HomeMy WebLinkAboutWater Distribution Systems
Augusta Richmond GA
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SECTION 14A
WATER DISTRIBUTION SYSTEMS
BASIS FOR DESIGN:
Design shall conform to the requirements as set forth in "Minimum Standards for Public
Water" (latest version) as published by the Georgia Environmental Protection Division
(www.dnr.state.ga.us/dnr). A Professional Engineer registered in the State of Georgia
must prepare the plans and specifications,
There shall be no physical connection between a potable water supply and a questionable
water supply which would allow unsafe (contaminated) water to enter the potable water
system by direct pressure, vacuum, gravity or any other means.
Hydraulic designs shall be based upon pressure data applicable to the portion of the
service area, which will serve the proposed facility. Air release valves in vaults shall be
provided at all high points in the water main as required by the Utilities Director.
All water distribution systems shall be looped to the greatest extent possible. Water
mains shall have a minimum nominal inside diameter of 6 inches, Water mains having
an inside diameter of less than 6 inches will not normally be considered,
During construction when deviations from approved plans are desired, the Augusta
Utilities Department's Inspector shall be notified, Revised plans shall be submitted as
soon as possible to the Augusta Utilities Department for approval. Minor changes not
affecting capacities, flows or operation may be allowed in the field during construction
by the Utilities Department's Inspector. The Inspector shall have final authority as to
what constitutes a minor or major change. An approved set of Record Drawings clearly
showing any changes shall be submitted to the Augusta Utilities Department Inspector at
the completion of the work and prior to sign-off of the final plat,
The Contractor/Developer is responsible for verifying the exact location, size and
material of any existing water facility proposed for connection or use by the project.
All phases of construction must be completed in accordance with the Erosion and
Sedimentation Act 12-7-1 et seq" and no water main must be installed on or in close
proximity of an abandoned landfill site or any site used for waste disposal.
DESIGN STANDARDS FOR WATER MAINS:
14.1 COVER
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-1
14.1.1 Standard depth of cover is 4 feet below existing and proposed road surface unless
otherwise approved by the Augusta Utilities Department.
14.1.2 Minimum cover to finished grade over water mains shall be 36 inches. Minimum
cover under ditch bottoms shall be 24 inches. These must be approved by the
Augusta Utilities Department on a case-by-case basis.
14.2HORIZONT AL SEP ARA TION
14.2.1 Ten (10) feet to any existing or proposed sanitary sewer/force main, storm sewer
or sewer manhole (less than 10 feet requires pipe material to be Ductile Iron Pipe (DIP)
for both Water Main and Sewer/Force Main).
14.2.1 Fifteen (15) feet to buildings, top of bank oflakes/streams/creeks, other structures
(10 feet absolute minimum - only when unavoidable, and pipe material is
required to be DIP).
14.2.2 Ten (10) feet minimum separation to gas mains,
14.2.3 Ten (10) feet minimum to underground electric cable.
14.2.4 Current Georgia EPD separation requirements.
]4.2.5 All separation distances above are edge to edge.
14.3 VERTICAL SEPARATION
14.3,1 Water main shall cross over other pipes,
14.3,2 Eighteen (18) inch minimum separation (edge to edge) between all pipes and
cables shall be maintained (6 inch absolute minimum separation with DIP) when
conforming to Georgia EPD separation requirements,
14.3.3 When water mains cross under sewers, additional measures shall be taken. At
least ] 8 inches of separation between the bottom of the sewer and the top of the
water main shall be provided. Adequate structural support for the sewer to
prevent deflection or settling on the water main. The joint of water pipe shall be
centered at the crossing. Encasement of the water pipe in concrete shall also be
considered.
14.4 LAYOUT
14.4.1 Normal location of proposed water Jines is on the north side of east-west streets,
and the east side of north-south streets.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-2
14.4.2 For existing County roads, the proposed water line will generally be located five
(5) feet inside the right-of-way. For existing State roads, the proposed water line
must be located five (5) feet inside the right-of-way. Unusual circumstances may
warrant deviation. The location of the water line will be determined, also, by the
location of the existing lines to be tied into at the beginning and end of the
project.
14.4.3 For subdivisions, the proposed water line shall be located four (4) feet from the
back ofthe curb.
14.4.4 Wherever possible, avoid laying water line on the same side of the road as the gas
lines.
14.4.5 Water service lines for residential development shall be located at the center of
lot.
14.4.6 Dead ends shall be minimized by making appropriate tie-ins whenever practical.
Permanent dead ends will not be accepted unless unavoidable. Dead ends shall be
equipped with a fire hydrant. If, under special circumstances, where water lines
smaller than six (6) inches in diameter are accepted, an approved blowoff shall be
required for flushing purposes. A minimum of two 22-1/2-degree bends shall be
required on 6" and larger water lines in cul-de-sacs and shall be shown as such on
plans.
14.4.7 All water mains shall be placed in right-of-way areas or dedicated easements. All
easements shall allow adequate area to construct and maintain the water line and
appurtenances involved. Permanent easements shall be a minimum of 15 feet
wide with line installed in center of easement. Permanent easements shall be
provided as needed to serve adjacent property, even if the water line is not
installed at that time. If the line has not been installed to future serve adjacent
property, a larger easement than the minimum may be required to construct future
line. Easement agreements shall be specific to state that no permanent structures
may be constructed within the limits of permanent easements,
14.5 WATER MAIN MATERIAL
Water mains shall be either ductile iron pipe (DIP), polyvinyl chloride (PVC), or
galvanized pipe as outlined below. Any pipe, solder and flux used during installation of
the water lines and services must be "lead-free" with not more than 8% lead in pipe and
fittings, and not more than 0.2% lead in solders and flux.
DIP shall be centrifugally cast and shall conform to AWWA C150/ANSI A21.50 (latest
version) for design and AWWA C151/ANSI A21.51 (latest version) for manufacture.
PVC pipe 6 inch to 12 inch diameter shall conform to A WW A C900 (latest version).
PVC pipe 14 inch to 36 inch diameter shall conform to A WW A C905 (latest version).
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-3
For water mains 6" through 16", DIP Pressure Class 350 shall be allowed. For water
mains 18" through 24", DIP Pressure Class 300 shall be allowed. PVC C900 (most
current date), Class 200, SDR-14 with cast iron equivalent O.D.s, gasket bell end with
elastomeric gaskets shall be allowed for water mains 6" through 10" (solvent weld joints
are not permitted). Galvanized pipe shall be seamless, American made, Schedule 80 and
shall conform with the ASTM Specifications. Flanged DIP shall have threaded ductile
iron flanges and shall conform to the requirements of AWWA C115 (latest version). All
flanges shall be Ductile Iron Class 150, ANSI B 16.5 (latest version). Flanges shall be flat
faced and all joints shall use 1/8 inch black neoprene full-faced gaskets.
Ductile iron pipe and fittings shall have bituminous coating outside and shall be cement
lined in accordance with AWWA CI04/ANSI A21.4 (latest version). DIP shall have
1/16" cement mortar lining with rubber gasket push-on joints or mechanical joints.
Mechanical joint glands shall be ductile iron. Tee bolts and nuts shall be Cor-Ten steel.
Rubber gasket joints shall conform to A WW A C Ill/ANSI A21.11 (latest version), and
shall be furnished by the pipe manufacturer with the pipe. A non-toxic vegetable soap
lubricant shall be supplied with the pipe in sufficient quantities for installing the pipe.
The lubricant shall be approved by NSF for use with potable water mains.
Pipe classes designated previously in this standard are minimum allowed. Actual pipe
class shall be determined based upon the installation and the use intended. Pipe shall be
appropriately labeled on the drawings. All PVC pipe for potable water service shall bear
the approved stamp of the National Sanitation Foundation. Copper wire (12 gauge, bare
single strand) shall be attached along the top of all buried PVC water lines, wrapped
around service corporations and stubbed up into all valves boxes for locating purposes.
14.5.1 DIP shall be required in the following circumstances:
14.5.1.1
Within 10 feet of sanitary and storm pipes.
14.5.1.2
Within 15 feet of structures (near side of concrete footing), or top of bank
of lakes/streams/creeks,
14.5.1.3
Crossings over or under sewers, gas and storm pipes with less than 18
inches separation, with no joint allowed within 10 feet of crossing,
14.5.1.4
Beneath all paved areas, excluding driveways or sidewalks.
14.5.1.5
Within project boundaries of subdivisions with private roads where the
Utilities Department will take over the line for operations and
maintenance.
14.5.1.6
Along all state right-of-ways.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-4
14.52 The Utilities Director may mandate DIP in any instances of off-site or on-site
construction where future abuse to the line is possible due to location or
circumstances.
14.5.3 Restrained Joints shall be DIP as follows:
For 12-inch and Smaller - Restrained joint shall be U.S. Pipe Field Lok, American
Ductile Iron Pipe Lok-Fast, EBAA Iron Mega-Lug, or an equivalent product.
For 14-inch Diameter and Larger - Restrained joint shall be U.S. Pipe TR Flex,
American Ductile Iron Pipe Lok-Ring, or equivalent product.
If inserting in older cast iron pipe, the restrained joint shall be as approved by the
Augusta Utilities Department.
Retainer Glands/Mega':Lug shall not be considered a fitting.
The restraint method shall be suitable for the pipe size thickness and test pressure as
required for the specified design case. The plans shall indicate the restrained length of
pipe each side of the fittings.
14.5.4 Jack and Bore Installations:
Casing pipe used with jack and bore shall be in accordance with requirements of
the Georgia Department of Transportation (GDOT) or railway specifications and
Section 14C Excavation & Backfilling of these specifications. Carrier pipe shall
be restrained joint DIP as outlined in paragraph 14.5.3.
Directional Bore Installations: Directional bores will be considered as a viable
alternative to jack and bore installation under Augusta-Richmond County
roadways. The Utilities Director will review each case for materials and
construction methods.
14.5.5 Mains may be tapped as long as the tapping line is smaller than the tapped line
unless otheIWise approved by the Augusta Utilities Department. See Section 14.9
for service tap requirements. Equal size line connections approved by the
Augusta Utilities Department" shall require that a tee be cut into the main where
possible. Tees are also required at locations dictated by the Utilities Director.
Tapped connections in pipe and fittings shall be made in such a manner as to
provide a watertight joint and adequate strength against puII-out.
Tapping Sleeves and Valve shall be ductile iron, mechanical joint. Tapping
sleeves and valves are required for all taps 4 inches and greater. Taps less than 4
inches shall be provided with a . service saddle meeting the requirements of
Section 14.9. Valves shall be provided on all taps. Tapping sleeves shall be a
minimum of 6 feet from pipe joints.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-5
14.5.6 Schedule 40 PVC shall only be used as sleeves for the installation of service line
tubing under all pavement areas. Use in the water distribution system or other
areas are not acceptable.
14.5,7 Unspecified transitions from DIP to PVC are not allowed, Material for transition
shall be indicated and specified and must be approved by the Augusta Utilities
Department.
14.5.8 All construction material shall be first quality, not previously used. Repair
clamps are not acceptable. Damaged or faulty pipe and materials must be
properly replaced. All gaskets shall be new. When connecting to existing valves
or fittings, gaskets shall be replaced, not reused,
14.5.9 The Engineer shall provide a complete set of shop drawings, which shall indicate
the Augusta Utilities Department's specific material requirements. In general,
material requirements will be guided by the latest versions of the specifications of
A WW A, ANSI, ASTM, and NSF.
14.6 WATER MAIN SIZE
The minimum size of water main shall be 6 inches unless otherwise approved by the
Utilities Director. However, a professional engineer shall justify the size of the pipes
with a hydraulic network analysis.
The new water main shall have the ability to meet maximum daily demands plus fire flow
requirements as mandated by Georgia EPD "Minimum Standards for Public Water
Systems" (latest version) and the Augusta Fire Marshal. The residual design pressure
under all conditions shall not be less than 20 psi.
14. 7 VALVES, FITTINGS AND APPURTENANCES
Valving of all water distribution systems shall be designed to facilitate the isolation of
each section of pipeline between intersections of the network. Generally, the number of
valves at an intersection shall be one less than the number of pipes fonning the
intersection. Gate valves, 4 inches to 12 inches, shall be the resilient seat type
confonning to A WW A C509 (latest version). Valves larger than 12 inches shall be gear
operated butterfly valves, confonning to AWW A C504 (latest version). Wafer valves
shall not be accepted. Valves shall generally be installed at intervals of not more than
2,000 LF on transmission mains and on all primary branches connected to these mains.
Where possible, a valve shall be installed next to a fire hydrant for locating purposes. In
high density areas (25 dwelling units), valves shall be installed as necessary to minimize
the number of persons affected by a water main break.
The Utilities Director shall detennine which mains are distribution or transmission.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-6
Valves shall OPEN LEFT if installed south of Gordon Highway (SR 10), or OPEN
RIGHT if installed north of Gordon Highway. Valves shall be provided with valve stem
extensions to within 6 inches of ground sutface, where centerline of pipe to grade is
greater than 4 feet.
Valve boxes shall be M&H E-2702, Mueller HI 0364 or approved equal. Each valve box
shall be slip-type to adjust for a minimum cover of 36" bury. The flanged base of the
valve box shall be at least six (6) inches above the pipe so not to stress water lines 4" and
smaller, Extension pieces will be required for additional depth over valves. Extensions
shall be M&H E-3120 or Mueller H-10375. Covers shall have "WATER" cast on top.
All valves, bends, tees, crosses and dead ends shall be restrained by a mechanical
restraint systems as outlined in Paragraph 14.5.3., or by use of a concrete thrust block in
those instances that warrant such an installation. Thrust blocks shall be poured-in-place
concrete having a minimum compressive strength of 3,000 psi after 28 days of cure time.
Calculations for restrained joints shall be provided by the design engineer. Soil bearing
value shall be 2,000 psf maximum. Lower values shall be used when soil is poor quality.
All materials, fittings and appurtenances intended for use in pressure pipe systems shall
be designed and constructed for a minimum working pressure of 150 psi unless the
specific application dictates a higher working pressure requirement.
Standard pressure pipe fittings of size four (4) inch ill and larger shall be ductile iron
conforming to AWWA C153 (latest version), with mechanical joints unless flanged or
restrained joints are required. Gray cast-iron fittings are not allowed. Ductile iron
fittings shall be cement lined in accordance with A WW A C 104 (latest version).
Mechanical joint fittings, 24 inches and smaller shall be rated for 350 psi working
pressure. Flanged joint fittings 24 inches and smaller shall be rated for 250 psi working
pressure. All fittings 30 inches and larger shall be rated for 250 psi working pressure. For
sizes less than four (4) inch ill, fittings shall be suitable to the pipe material and
application. Glands for mechanical joint fittings shall be ductile iron, and tee bolts and
nuts shall be Cor-Ten steel. Only bolt systems furnished by the manufacturer for
mechanical joints are acceptable; nuts and bolts shall be new, not reused. Pipe gaskets
shall be new as supplied by the pipe manufacturer. All flanges shall be ductile iron Class
150, ANSI B16.5, All flanges shall be flat faced. Full face, 1/8 inch black neoprene
gaskets shall be used on all flanged joints. All joints shall conform to AWWA Clll
(latest version). Bolts, nuts and washers for flanges shall be hot dip galvanized, except T-
bolts shall be Cor-Ten steel.
List of Specifications:
ANSI! A WW A C 151/ A21.51-96 4-FEB-1996 or latest version
American National Standard for Ductile-Iron Pipe, Centrifugally Cast, for Water
ANSI!AWWA CI50/A21.50-96 1996 or latest version
American National Standard for Thickness Design of Ductile-Iron Pipe
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-7
ANSIJAWWA C1l5/A21.15-94 1994 orlatest version
American National Standard for Flanged Ductile-Iron Pipe With Threaded Flanges
ANSIJ A WW A C 111/ A21.11-95, 1995 or latest version
American National Standard for Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings
ANSIJA WWA C153-98 1998 orlatest version
American National Standard for Ductile-Iron and Gray-Iron Fittings, 3 in. through 48 in. (75 mm
through 1200 mm), for Water and Other Liquids
ANSIJAWWA C104/A21.4-95 1995 or latest version
American National Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for
Water
14.8 FIRE HYDRANTS
Fire hydrants shall be provided in all water mains, transmission and distribution systems.
Accepted models are Mueller #A-24018, M&H Figure 29T AWWA Compression Type-
Dry Top-Traffic Model 150 psi working pressure, 300 psi testing pressure. Kennedy K-
81D will also be accepted. All fire hydrants shall be ordered safety yellow body with
white bonnet and caps. Fire hydrants shall be spaced such that the radius of protection
will not be more than 5,00 feet. In certain areas, closer spacing may be required by the
Fire Marshal.
Each hydrant shall be left turn opening and capable of delivering a flow of at least 500
gallons per minute with a residual design pressure of not less than 20 psi, or a higher flow
as required by the Fire Marshal. Multiple fire hydrants with looped mains and/or larger
main sizes may be required to provide water for higher flow demand. Flow tests shall be
performed to verify the specified fire flow demand,
Fire hydrants shall be of the dry barrel break-away type conforming to A WW A C502
(latest version), with two 2 Y:z inches threaded hose nozzles and one 4 Y:z inch threaded
pumper nozzle. Hose and pumper nozzle threading shall be national standard. Show
connection shall be 6-inch mechanical joint. The center line of the nozzles shall be 18
inches above the finish grade. Hydrants shall have a 5 1f4 inch interior valve opening and
be restrained from hydrant to tee at the main. At the discretion of the Utilities Director,
additional protection for fire hydrants shall be provided including but not limited to
concrete filled ductile iron traffic posts,
Fire hydrant branches (from main to hydrant) shall be a minimum of 6 inches ill. Each
branch shall be provided with a resilient seat gate valve located as close as possible to the
main. Hydrants shall be located at or near road right-of-way lines with pumper nozzle
pointing toward the road. A clear zone around all fire hydrants shall be adhered to,
consisting of a 5 foot radius around the hydrant and 7 feet above the top of the hydrant.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-8
Maintain 15 feet minimum from hydrant to all structures. Placement of landscaping,
fencing, etc. shall be considered in order to meet this clear zone requirement.
List of Specifications:
ANSIJA WW A C500-93 1993 or latest version
Metal-Seated Gate Valves for Water Supply Service (includes addendum C500a-95
ANSIJ A WW A C502-94 1994 or latest version
Dry-Barrel Fire Hydrants (includes addendum C502a-95)
ANSIJ A WW A C503-97 1997 or latest version
Wet-Barrel Fire Hydrants
ANSIJAWWA C504-94 1994 or latest version
Rubber-Sealed Butterfly Valves
ANSIJAWWA C507-99 I-DEC-1999 orlatest version
Ball Valves 6 in. through 48 in. (150 mm through 1200 mm)
ANSIJ A WW A C508-93 1993 or latest version
Swing-Check Valves for Waterworks Service, 2 in. (50mm) Through 24 in. (600mm) NPS
(includes addendum C508a-93
ANSIJAWWA C509-94 1994 orlatestversion
Resilient-Seated Gate Valves for Water-Supply Service (includes addendum C509a-95)
ANSVAWWA C550-90 1990 or latest version
Protective Epoxy Interior Coating for Valves and Hydrants
14.9 WATER SERVICE LINES AND TAPS
Tapping sleeves and tapping crosses shall be of a heavy body ductile iron, mechanical
joint suitable for a working pressure of 150 psi for sleeves and crosses larger than 14-inch
(200 psi for sleeves and crosses equal to or less than 14-inch), as approved by the
Augusta Utilities Department.
No direct service taps shall be allowed. All service line taps shall be supplied with
corporation stops. Service line tubing shall be rolled of soft continuous and seamless
copper Type K conforming to A WW A C800 and ASTM B-88 (latest version).
Corporation Stops and Main. Connectors:
%" FB600 - 3 Ford or Equal
I" FB600 - 4 Ford or Equal
Taper Thread Inlet by Flare Copper Outlet
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-9
Eighth Bends:
%" LA02 - 33 Flare 1/8 Bend
%" LA04 - 33 Compression 1/8 Bend
I" LA02 - 44 Flare 1/8 Bend
1" LA04 - 44 Compression 1/8 Bend
Minimum size for residential use shall be one (1) inch. The service line shall be laid in a
straight line and be of a continuous piece of pipe from corporation to curb cock. The
curb cock shall be located 6 inches behind and 8 inches below the top of new curb or
edge of asphalt. Where service connects to DIP or any pressure-rated pipe, service
saddles must be used. Brass double strap tapping saddles shall be used. U-bolt type
straps are not acceptable. All water service taps on the main shall be spaced at a
minimum distance of 18 inches apart and a minimum of 18 inches from a bell or fitting.
If two or more taps are required at a minimum spacing, they shall be offset 450
alternatively. Services greater than one (1) inch shall be seamless galvanized. 2"
services shall have two 2" 90-degree galvanized elbows per Augusta Utilities' 2 Inch
Water Service detail.
Services shall not exceed over 100 feet from the main to the meter. Where possible,
meter shall be placed in unpaved area as close to the water main as possible.
14.10 METER INSTALLATION
The ContractorfDeveloper shall furnish and install an approved meter box at the
termination point of all water services, and maintain until such time as a meter is
installed. Meters will be installed by Augusta Utilities Department at the time services is
required at the stub-out. Each unit within a residential building (i.e., duplex, triplex, etc.)
shall have a separate meter, unless prior approval is received by the Utilities Director.
The proper sizing of service lines is the responsibility of the design engineer. Meters will
be available in the following sizes only: 5/8 x 3/4, 1, 1 ~, 2, 3, 4-inch, and larger standard
sizes as necessary. Meter boxes for 1 ~ inch and smaller meters are standard. 2-inch and
larger shall be installed in a meter vault. The Augusta Utilities Department reserves the
right to request historical data for meter sizing.
Meter boxes shall be Rome type, 10" x 19" x 10" cast iron box and lid. The top shall
have cast ribs on the bottom side with four (4) legs to prevent sliding movement. The
box shall have a minimum weight of 37 lbs., for meters 1 ~ inch or smaller. Meter and
curb stop shall be fully encased by the meter box. Meter vaults (for meters 2 inch and
larger) shall be fabricated of masonry block or pre-cast reinforced concrete using 3,000
psi concrete and #4 rebar. The access hatch shall be made of heavy duty aluminum, and
shall be hinged and lockable. The hatch shall be large enough for removal of the meter
but no smaller than 48" x 36". Wall dimensions shall allow 2 feet of working clearance.
Vault floors shall be no less than 4 inches thick with 3,000 psi concrete and #4 rebar,
with the meter located no less than 18 inches off the floor.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-10
The Augusta Utilities Department assumes no responsibility for undersized meters and
problems associated with it. All meters will be provided and installed by the Augusta
Utilities Department. The meters remain the property of the Augusta Utilities
Department.
Meters should generally be placed 18 inches inside the adjacent utility easement that
parallels the right-of-way. Where sidewalk, two feet of clearance is required between the
customer's side of the sidewalk edge and the meter box. In developments where the
property line is not clearly defined (e.g., condominiums) the meter should be placed for
ready access as approved by the Augusta Utilities Department. Meter and control valves
shall be accessible and unobstructed for 4 feet in all directions. This shall include but not
be limited to transformers, telephone junction boxes, walls, trees, etc. Meters shall not be
placed in areas that can be fenced, such as backyard. Meter boxes shall not be placed in
any asphalt or concrete surfaced areas (sidewalks, driveways, curbs, etc.) unless approved
in writing by Augusta Utilities. For shopping centers, the developer's engineer should
give special consideration to meter layout so as to satisfy these requirements. When no
alternative is available but to locate in asphalt, the top of box shall be flush with the
asphalt surface. Meters shall not be located in low areas that normally receive storm
water. The box shall also be located outside of parking stalls. The box and lid should be
traffic bearing, but located outside of a commonly trafficked area,
14.11 BACKFLOW PREVENTION DEVICES
Backflow prevention devices shall be provided, as required by the Utilities Director and
as set forth in these Standards. All irrigation systems, water selVices and fire lines for
industriaVoffice/commercial, schools~ mobile home parks, multi-family residences and
any other locations as determined by the Utilities Director shall require suitable backflow
prevention assemblies on the customer side of service lines (domestic, irrigation, and
fire). Backflow devices shall be tested by a certified person and the results furnished to
the Augusta Utilities Department prior to any water use. Residential development shall
install a "Dual Check" Backflow Device on the customer's side of service line at the
point of tie-in to the water meter. The plumber or builder tying service into the set meter
will submit the test results for the backflow prevention device to the Augusta Utilities
Department's Inspector prior to acceptance and any water use.
Backflow prevention device assemblies shall be the latest approved product of a
manufacturer regularly engaged in the production of this type equipment. All assemblies
shall be as approved by the America Society of Sanitary Engineering (ASSE), The
American National Standards ltistitute (ANSI), The American Water Works Association
(A WW A), Foundation for Cross Connection Control and Hydraulic Research of the
University of Southern California, and the Georgia State Plumbing Code.
Type and size of assemblies shall be indicated on the drawings.
Backflow prevention device ownership and maintenance responsibilities shall be as set
forth in the appropriate ordinances. The Owner shall document yearly that the backflow
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-11
prevention device has been tested annually by a qualified technician. A copy of the
technician's certification must be attached to the test results and submitted to the Augusta
Utilities Director. Engineer must comply with the Augusta Utilities Department Policies
and Procedures for Backflow Prevention by Containment (latest version). A copy of this
manual is available upon request.
List of Specifications:
ANSI! A WW A C51 0-97 1997 or latest version
Double Check Valve Backflow-Prevention Assembly
ANSI! A WW A C511-97 1997 or latest version
Reduced-Pressure Principle Backflow-Prevention Assembly
14.12 SYSTEM PRESSURES
The design engineer shall not assume a pressure greater than 35 psi at the meter of
detector check valve without confirmation from the Augusta Utilities Department. The
design engineer, if possible, should field verify the available pressures prior to finalizing
their design. The Augusta Utilities Department does not guarantee or warrant any
pressure or flow above what the system can furnish. Augusta Utilities reserves the right
to limit water usage for irrigation in the event of drought, or requirement by the Georgia
EPD.
14.13 FIRE LINES
All fire lines shall have a detector check valve with a 5/8 inch by-pass meter (to detect
low flows) within the right-of-way or dedicated easement. No exceptions to the by-pass
meter requirement shall be made regardless of sprinkler system type, configuration, etc.
CONSTRUCTION:
14.14 WATER DISTRIBUTION SYSTEM INSTALLATION
Authorization must be obtained from the Augusta Utilities Department to construct, alter
or modify a water line. Construction of water infrastructure will be authorized by the
Utilities Department upon approval of submitted plans and notification of the Augusta
Utilities Department at least 24 hours prior to starting construction (706-772-5503).
Installation of water mains and associated appurtenances shall be in accordance with
current A WW A specifications and manufacturer's requirements for the specific product.
Loading or unloading and storage of pipe, fittings, valves, etc. shall be done such that to
avoid damage. The interior of all pipe, fittings, valves, etc. shall be kept free of dirt and
foreign matter at all times. All piping shall be placed in a dry trench with a stable
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-12
bottom. Wet trench installation shall be allowed only upon written approval of the
Utilities Director,
Mechanical restraint systems shall be required at each fitting involving a change of
direction and as specified in the approved plans. Concrete thrust blocks will be allowed
in lieu of mechanical restraint systems. '
Backfill shall be free of boulders and debris. Sharp or rocky material encountered in the
base shall be replaced with proper bedding. Pipe shall be laid on line and grade as
designed. Pipe joints, gravity blocks, service connections, and conflicts shall be left
exposed until visually inspected and approved by the Augusta Utilities Department's
Inspector.
Fire hydrants shall be installed true and plumb with the center of the pumper nozzle
facing toward the road. Hydrants shall not be placed in the sidewalk. The engineer will
be responsible for moving hydrants placed in sidewalks.
All valves shall be placed according to plans. Valve stems shall be installed plumb.
Valve stem extensions are required as described in Section 14.7. Air relief valves shall
be installed at all high points in the water main where air can collect, as shown on the
plans or as directed by Augusta Utilities.
List of Specifications:
ANSI! A WW A C600-93 1993 or latest version
Installation of Ductile-Iron Water Mains and Their Appurtenances
ANSI! A WW A C605-94 30-JAN-1994 or latest version
Underground Installation of Polyvinyl Chloride (PVC) Pressure Pipe and Fittings for
Water
ANSI! A WW A C512-92 1992 or latest version
Air Release, AirN acuum and Combination Air Valves for W ater Works Service
14.14.1 Handling and Storing of Materials: Unload pipe so as to avoid
defonnation or other injury thereto. Place no pipe within pipe of a larger size.
Store pipe and fittings on sills above stonn drainage level and deliver for laying
after the trench is excavated. Valves shall be drained and so stored as to protect
them from freezing.
14.14.2 Pipe Laying (General): The interior of the pipe shall be clean and joint
sulfaces wiped clean and dry when the pipe is lowered into trench. Lower each
pipe, fitting and valve into the trench carefully and lay true to line and without
objectionable breaks in grade. The depth of cover below finished grade shall be
not less than 3 feet, or as shown on the drawings. Give all pipes a unifonn
bearing on the trench bottom. Allow no trench water or dirt to enter the pipe after
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-13
laying. Insert a watertight plug in the open end of the piping when pipe laying is
not in progress.
14.14.3 Boring and Jacking: Where required by the drawings, the water line will
be installed in a steel casing, placed by boring and jacking. Where boring is
required under highways, the materials and workmanship will be in accordance
with the standards of the State Highway Department or local authority. Boring
and jacking under railroads will be governed by the latest A.R.E.A. Standards,
Part 5, "Pipelines" and those of the railroad involved.
14.14.3.1 Casing Pipe: The casing pipe shall conform to the materials standard of
ASTM Designation A252, with minimum wall thickness of 0.219 inch. Steel pipe
will have a minimum yield strength of 35,000 psi. Casing pipe shall be joined
together with welded joints.
14.14.3.2 Carrier Pipe: The carrier pipe shall be ductile iron as specified herein.
14.14.3.3 Installation: The steel casing shall be installed by the "Dry Bore and Jack"
method. If voids develop or if the bored hole diameter is greater than the outside
diameter of the pipe by more than approximately 1 inch, remedial measures will
be taken as approved by the Engineer.
When installing water line through casing, Contractor shall use mechanical joint
pipe with retained glands through length of casing. The water main shall be
strapped to 8 foot long treated wooden skids with metal straps throughout length
of casing. The ends of the casing shall be sealed with brick and mortar.
14.14.4 Reaction Blocking: All plugs, caps, tees, bends and other fittings shall be
provided with adequate reaction blocking as shown on the drawings. Reaction
blocking shall be made to bear directly against the undisturbed trench wall.
Where trench conditions are, in the opinion of the Engineer, unsuitable for
reaction blocking, the Contractor shall provide tied joints to adequately anchor the
piping as shown on the drawings. All the rods and clamps shall be given a
bituminous protective coating.
14.14.5 Pressure and Leakage Testing: Before any work will be accepted for
payment, the Contractor will fill the piping with water, open outlet as necessary
for expelling the entrapped air. No fire hydrant shall be opened full force during
charging operations'. Thereafter, furnish the necessary equipment and test the
piping under the supervision of the Engineer for a period of at least 2 hours at not
less than 1.25 times the design pressure in pounds per square inch, based upon the
highest elevation of the section under test. Pressure testing shall be in accordance
with the latest A WW A Standard C600, Section 4.1. at 1.5 times the working
pressure at the point of testing. Inspect all joints, and remedy to the satisfaction
of the Engineer any defects discovered. Continue the test until all visible leaks
have been eliminated from the part of the system under test, and the pressure
remains constant with a maximum pressure drop of 5 psi for the duration of the
test.
Immediately following the pressure test, and before any work will be accepted for
payment, the Contractor shall perrorm a leakage test. Leakage is defined as the
quantity of water to be supplied into the newly laid pipe, or any valved section
Augusta Utilities Department Design Standards & Construction Specifications
September 2000
14-14
thereof necessary to maintain the specified leakage test filled with water to within
5 psi of the test pressure. No pipe installation will be accepted until the leakage is
less than the number of gallons per hour as detennined by the fonnula:
L = Allowable L - ~ leaka~e in gallons per hour.
S = The length of pipe in the section tested.
D = The nominal diameter of the pipe in inches.
P = The average test pressure during the leakage test in pounds per
square inch gauge.
The leakage test shall be conducted in accordance with A WW A Standard C-600,
Section 4.1 (latest version).
14.14.6 Connection to Existing System: All connections to existing mains shall be
made under the direct supervision of the Augusta Utilities Department's
Inspector. Valves on existing mains shall be operated 'by or under direct
supervision of Augusta Utilities Department personnel. Tapping sleeves and
valves shall be pressure tested prior to tapping. If service to existing customers
must be cut off, the Augusta Utilities Department shall be notified at least three
(3) days in advance to make necessary notifications. The Contractor shall
disinfect and secure appropriate Utilities Department clearances and samples for
any service interruptions which occur as a result of a Contract request for shut
down or error. The clearances shall be obtained within 72 hours of reactivation.
If cut-off of service is required, the Contractor shall be ready to proceed with as
much material pre-assembled as possible at the site to minimize the length of
service interruption. Augusta Utilities reserves the right to postpone service cut-
off if, in the opinion of the Utilities Director, the Contractor is not ready to
proceed on schedule. No customer should be without water for more than four (4)
hours. The Owner/Developer shall arrange for temporary services to Customer if
, water will be shut off for more than four hours.
Local chlorination will be required for all pipe and fittings used to complete
connections with the potable water system. Tapping sleeves and valves shall be
chlorinated in accordance with A WW A requirements. All wet taps shall be
witnessed by the Augusta Utilities Department's Inspector.
14.15 CLEANING AND FLUSHING
Upon completion of installation, the mains shall be flushed and the water disposed of
without creating a nuisance. Flushing must achieve a minimum water velocity of 2.5 fps
in all portions of the pipe. The duration of the flushing will be detennined by the
Augusta Utilities Department's Inspector. If, in the opinion of the Augusta Utilities
Department's Inspector, there is insufficient water available for proper flushing, the
Contractor shall clean the lines by pigging. No flushing or cleaning shall take place
without an Augusta Utilities representative present. The existing mains that the new
Augusta Utilities Deparbnent Design Standards & Construction Specifications
September 2000
14-15
mains are connected to may be required to be flushed under the direction of the Augusta
Utilities Department when service is restored.
14.16 TESTING AND DISINFECTION
All water mains shall be leak tested. The Contractor/Developer shall provide all
equipment, materials and labor necessary for pressure and leak testing. This test must be
observed by an Augusta Utilities Department representative and the design engineer. A
pumping pressure of 200 psi must be supplied at the expense of the
Contractor/Developer. The main tested shall either be isolated from active potable lines
or protected from leakage by a double valve arrangement. All water used for pressure
testing must be potable water with an adequate chlorine residual. Water lines shall be
tested by valve sections. Maximum allowable leakage shall be as determined in
accordance with current A WW A specifications. The standard duration of test is four (4)
hours. Testing procedures shall meet or exceed A WW A C600 (latest version)
requirements. Any portions of the main which fail the test shall be replaced or adjusted
until the entire new main passes the test criteria. The pressure and leakage test shall be
done concurrently.
Augusta Utilities shall be notified at least 24 hours in advance to schedule bacteriological
testing of water mains. The Contractor shall replace or adjust components of the pipeline
which fail the test. Clearance is required from the Utilities Department before the
Augusta Utilities Department will allow the main to be put into service.
All piping complete with fittings and appurtenances shall be sterilized as specified in the
applicable sections of A WW A Specification C651 (latest version) "Disinfecting Water
Mains." Piping and appurtenances shall be thoroughly flushed then chlorinated with not
less than fifty parts per million (50 ppm). Calcium hypochlorite can be used. Water from
the existing distribution system or other source of supply should be controlled so as to
flow slowly into the newly laid pipeline during the application of chlorine. The solution
should be retained in the pipeline for not less than 24 hours and a chlorine residual of 10
ppm should be available at this time. The system shall then be flushed with potable water
and the sampling program started. Sampling taps and chlorinated water used for
disinfection shall be flushed to a location that will not damage property, persons, etc., and
shall be provided by the Contractor/Developer at the expense of the
Contractor/Developer. The provisions of this paragraph apply equally to new pipe and
fittings and to existing pipelines into which connections have been made or which may
have been otherwise disturbed to the extent that contamination may have occurred. All
requirements of the health authorities shall be observed in executing this work. The
disposal of heavily chlorinated water (folJowing disinfection) must be accomplished in
accordance with the latest editions of the A WW A Standard C651 and the EPD's
Minimum Standards for Public Water Systems.
Two or more successive sets of samples, taken at 24 hour intervals and tested by a State
approved private lab, shall indicate bacteriologically satisfactory water and the results
submitted to the Engineer.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-16
14.17 WATER/SEWER SEPARATION:
A 10 foot horizontal separation shall be maintained between water and sewer lines.
Where the horizontal separation cannot be met or where water and sewer lines must
cross, an 18 inch vertical separation, water over, sewer must be maintained. Where the
above conditions cannot be met, water and sewer lines shall be cast iron or ductile iron
pipe with joints staggered such that maximum separation between joints exists. The
water line shall be installed overthe sewer line,
14.18 AS-BUILT DRAWINGS:
As the work progresses, record on one set of utility drawings all changes and deviations
from the contract drawings in sizes, lines or grade. Record also the exact final location of
water lines by offset distances to surface improvements such as edge of existing
pavement or to property lines, etc. at a maximum interval of 200 feet. Make sufficient
measurements to locate definitely all water lines etc., to permanent points. The drawings
will show references to all valves, fittings, pipe brand changes, etc. Transfer accurately
all such records in red pencil to white prints of the utility drawings and deliver them to
the Engineer with monthly payment estimate.
14.19 MEASUREMENT AND PAYMENT:
Payment will be made only for elements in place and tested as follows:
1. Pipelines will be paid for at the unit contract price, per linear foot, for each
size, type and class installed, complete, including fittings. No deduction
will be made for the laying length of valves and fittings installed within
pipelines.
2. Valves will be paid for at the unit contract price for each size and type
installed. Payment therefore will include box or vault as shown on the
plans.
3. Fire hydrants will be paid for at the unit contract price for each size
installed, complete with the lead piping, valve, and main tee, in place as
shown on the plans.
4. Service lines will be paid for at the unit contract price for each size and type
installed, complete as sh.own on the plans.
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September 2000
Design Standards & Construction Specifications
14-17
TillS PAGE INTENTIONALLY BLANK
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-18
SECTION 14B
SANITARY SEWER SYSTEMS
BASIS FOR DESIGN:
A Professional Engineer registered in the State of Georgia must prepare the plans and
specifications. Design must conform to the requirements set forth in "Recommended
Standards for Wastewater Facilities" (latest version) published by the Great Lakes-Upper
Mississippi River Board of State and Provincial Public Health and Environmental
Managers, and follow EPD guidelines.
Before a sewer is designed, the area to be served should be studied for the purpose of
estimating the type and quantity of flow to be handled. Design should be considered for
the ultimate tributary population. Consideration should be given to the maximum
anticipated capacity of institutions, industrial parks, etc. Where future relief sewers are
planned, economic analysis of alternatives should accompany initial permit application.
Design should be based on peak sewage flows plus the anticipated maximum
infiltration/inflow levels under normal open channel flow conditions.
All food service operations are required to install, operate, clean, and maintain a
sufficiently sized oil and grease, separator (grease trap) to prevent obstruction or
interference with the proper operation of the sanitary sewer collection system and
treatment plants.
All existing waterworks units, including basins, wells, and treatment units, located within
200 feet of a proposed sewer shall be shown on the engineering plans. Soil conditions
within this 200 feet of waterworks shall be determined and shown on the plans.
A professional engineer shall determine force main size, after a study has been completed
of the surrounding area with regards to the proposed construction and potential future
construction. A minimum velocity of 2 fps within a force main shall be acceptable for
prevention of solids settling.
No sanitary sewer lines less than eight (8) inches in diameter may be installed. Sanitary
laterals with clean-outs shall be installed atALL service tie-ins ,to the system.
During construction when deviations from approved plans affecting capacity, flow, or
operation are desired, the Augusta Utilities Department's Inspector shall be notified.
Revised plans shall be submitted as soon as possible to the Augusta Utilities Department
for approval. Minor changes not affecting capacities, flows or operation may be allowed
in the field during construction by the Utilities Department's Inspector, The Inspector
shall have final authority as to what constitutes a minor or major change. An approved
set of Record Drawings clearly showing any changes shall be submitted to the Augusta
Utilities Department Inspector at the completion of the work and prior to sign-off of the
final plat.
Augusta Utilities Department Design Standards & Construction Specifications
September 2000
14-19
The Contractor/Developer is responsible for verifying the exact location, size and
material of any existing sewer facility proposed for connection or use by the project.
DESIGN STANDARDS FOR SANITARY SEWER LINES:
14.20COVER
14.20. 1 Minimum cover to finished grade over sanitary sewer shall be four (4) feet.
14.20.2Maximum cover shal~ be 20 feet unless otherwise approved by the Augusta
Utilities Department.
14.21HORIZONTAL SEPARATION
14.21.1 Ten (10) feet to water lines and stonnsewer lines.
14.21.2 Fifteen (15) feet to buildings, top of bank of lakes/streams/creeks, other structures (10
feet absolute minimum - only when unavoidable, and pipe material is required to be
DIP),
14.21.3 Ten (10) feet minimum separation to gas mains.
14.21.4 Ten (10) feet minimum to underground electric cable.
14.21.5 All separation distances above are edge to edge.
14.22VERTICAL SEP ARA TION
Eighteen (18) inch minimum separation (edge to edge) between all pipes and cables shall
be maintained (6 inch absolute minimum separation with DIP)
14.23LA YOUT
14.23.1 Sanitary sewer easements shall be a minimum of twenty (20) feet wide with the
sewer line centered in the easement.
14.23.2Individual sewer services shall be a minimum of six (6) inches in diameter and
shall extend from the m~inand tenninate with a clean-out constructed at the edge
of right-of-way. If the main is installed outside of the right-of-way, the services
. with clean-outs shall terminate at the edge of the permanent easement. All lines
eight (8) inches in' diameter and larger shall tenninate in a manhole. Sewer lines
installed parallel to lakes/streams/creeks shall be designed to leave a 25-foot
undisturbed buffer along the edge of the bank. The required service lateral with
clean-out shall be inspected by the Augusta Utilities Inspector prior to physical
tie-in of private service line. The use of donuts or tying into the stack pipe of the
clean-out is strictly prohibited.
14.23.3Under no circumstances shall house sewer services and water services be laid in
the same trench.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-20
14.23.4AlI sewers shall be designed and constructed to give a mean velocity of 2.0 feet
per second, when flowing full, based on Manning's formula using an "n' of 0.014.
The following are the minimum slope that should be provided; however, slopes
greater than these are desirable.
Size (inches)
8
10
12
14
15
16
18
21
24
27
30
33
36
39
42
Minimum Slope in Feet
Per 100 Feet
0.40
0.28
0.22
0.17
0.15
0.14
0.12
0.10
0.08
0.067
0.058
0.052
0.046
0.041
0.037
Where velocities greater than 1 0 feet per second are attained, special
provision shall be made to protect against displacement by erosion and
impact.
14.23.5The maximum slope for a sanitary sewer line shall be 20%. All 20% sewers shall
be DIP with concrete collar walls at every joint or alternate restraining system
provided by design engineer. Slopes less than 20% are preferred. If steep slope is
necessary, the Augusta Utilities Department Engineer must approve the design.
14.23.6Buoyancy of sewers shall be considered and flotation of the pipe shall be
prevented with appropriate construction where high groundwater conditions are
anticipated. '
14.23.7Manhole spacing shall not exceed 400 LF for sewers 15 inches in diameter or
smaller, and 500 feet for sewers 18 inches to 30 inches.
14.23.8Manholes shall be located at the junction of sewers and at changes in grade, pipe
size, or alignment. They shall also be installed at all intersections. Sanitary sewer
manholes should not be located where surface water drain into them. When this is
not possible, a watertight cover shall be specified. For this purpose, and also for
assisting in locating manholes across country, the rims shall be set above grade.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-21
14,23.9A drop manhole shall be provided for a sewer entering a manhole at an elevation
of 24 inches or more above the manhole invert. Where the difference in elevation
between the incoming sewer and the manhole invert is less than 24 inches the
invert shall be filleted to prevent solids deposition.
14.23. IOMinimum angle between influent and effluent sanitary sewer lines at a manhole
shall be ninety (90) degrees.
14.23.IIBoth vertical and horizontal alignments shall be reviewed with the Augusta
Utilities Department prior to finalization,
14,23.12All pipes crossing proposed sanitary sewer lines shall be shown as conflicts in
plan and profile views on. the sanitary sewer plan sheets (not on detail sheets),
Crossings shall be designated by a letter (A, B, C, etc...) and include information
regarding top of pipe and bottom of pipe elevations. Contact the Augusta Utilities
Department for an example. The design engineer is responsible for identifying all
conflicts. . ..
14.23. 13 Where indicated on the plans, pipe stub-outs for the connection of future sewers
shall be provided during the construction of new manholes. Each stub-out shall
be plugged in the bell end of the stub-out with plug approved by Augusta
Utilities.
14.24SANITARY SEWER MATERIAL
Pipe for sanitary sewers shall be polyvinyl chloride (PVC) or ductile iron pipe (DIP) as
outlined below. However, DIP. is considered a remedial measure for special applications
only. Standard pipe lengths not greater than 20 feet shall be used. Force main pipe shall
be of approved C900-CL200 water pipe.
PVC pipe shall be manufactured from virgin resin conforming to ASTM D-3034 (latest
version) with minimum classification of SDR-35. DIP shall be epoxy-lined and conform
to AWWA C151/ANSI A21.51 (iatest version), Design methods shall conform to
AWWA CI50/ANSI A21.50 (latest version). DIP shall be Class 350 for 12" and smaller.
All fittings shall be of the same quality and material as the pipe to be used. Pipe classes
shall be determined based upon the installation and the use intended. Pipe shall be
appropriately labeled on the drawings. WYE fittings shall be utilized. TEE fittings and
saddles shall not be allowed. All DIP fittings shall be ductile iron or cast iron.
Aerial pipe shall be mechanical joint DIP or continuous weld, wrapped and coated steel
pipe. Piers shall be placed at every joint directly,behind the bell. Site conditions may
dictate construction utilizing more stringent requirements than indicated in the standard
detail. Anchor collars shall be constructed on the pipe whenever pipe grade is 20% or
greater. Restrainers may be used in lieu of collars when a particular brand and method
are determined equivalent.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14- 22
14.24.1 DIP shall be required in the following circumstances:
14.24.1. 1 When sanitary sewer line has less than four (4) feet of cover. Minimum depth
of DIP is two (2) feet.
I4.24.1.2When a sanitary sewer line cross over storm pipe (Must be one joint of DIP
centered on the crossing)
I4.24.1.3When a sanitary sewer line passes laterally within one (1) foot ofa storm sewer
line (Must be one joint of DIP centered on the crossing).
I4.24.1.4When a sanitary sewer line is to have in excess of eighteen (18) feet offill.
I4.24.1.5When a sanitary sewer line is at the maximum slope of 20%.
I4.24.I.6For last joint of pipe at all drop manholes greater than three (3) feet.
I4.24.I.7When a sanitary sewer is less than six (6) feet under a street.
I4.24.1.8The Utilities Director may mandate DIP in any instances of off-site or on-site
construction where future abuse to the line is possible due to location or circumstances,
extensive length under pavement, or in private property away from right-of-way areas.
14.24.2 PVC shall be jointed with a rubber gasket and shall conform to ASTM F477
(latest version) and manufacturer's recommendations. Solvent weld is
prohibited. DIP shall be of the bell and spigot type with push-on joints
conforming to ANSI A21.II (latest version) or mechanical joints.
14.24.3 Sewer Pipe Bedding:
Bedding requirements shall apply to sanitary sewer lines only. They are
not to be considered minimum bedding requirements and as such, do not
relieve the Engineer/Contractor of the responsibility to provide any
additional bedding necessary for proper construction .
Bedding shall be carefully placed along the full width of the trench so that
the pipe is true to line and grade of the pipe barrel. Bell holes shall be
provided so as to relieve pipe bells of all load, but small enough to ensure
that support is provided throughout the length of pipe. Crushed stone
embedment material shall conform to ASTM C33, Graduation #67 (3/4"
to #4). Bedding material shall be placed underneath and be carried up the
sides of the pipe as specified below.
Class B Bedding shall be performed by first undercutting the trench an
adequate amount to provide bedding under the pipe bell. The trench shall
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-23
then be brought to grade with compacted crushed stone as specified above
for the full width of the trench. The bedding material shall be placed in
the zone four (4) inches below the pipe and the pipe laid to line and grade
and backfilled with compacted crushed stone placed the full width of the
trench up to one-half the outside diameter of the pipe. Select backfill
placed in six (6) inch layers and compacted shall be the backfill from the
springline of pipe to 18 inches above the pipe. A minimum Class B
Bedding shall be used for all plastic pipes.
Class C Bedding shall be performed by first undercutting the trench an
adequate amount to provide bedding under the pipe bell. The trench shall
then be brought to grade with compacted crushed stone as specified above
for the full width of the trench. The bedding material shall be placed in
the zone four (4) inches below the pipe and the pipe laid to line and grade
and backfilled with compacted crushed stone placed the full width of the
trench up to one-fourth the outside diameter of the pipe. Select backfill
placed in six (6) inch layers and compacted shall be the backfill from the
bedding material to 18. inches above the pipe. A minimum Class C
Bedding shall be used for all ductile iron pipes.
14.24.4
Jack and Bore Installations:
Casing pipe used with jack and bore shall be in accordance with requirements of
the Georgia Department of Transportation (GDOT) or railway specifications.
14.24.5 New sewers shall be tied-in to the existing sewers at locations indicated on the
plans. No lines smaller than. six (6) inches shall be tied to a sewer line or
manhole. All tie-ins to existing manholes shall be cored. The Contractor shall be
responsible for maintaining uninterrupted service of the sanitary sewer during tie-
in operations. No connection to existing sanitary sewer shall be allowed until the
proposed sewer line is inspected and approved by the Augusta Utilities
Department's Inspector.
14.24.6 Side sewers shall be installed where shown on the plans. A side sewer
consists of a sewer extending from a connection to the street or main sewer to its
connection to the house sewer or other point. For new 8" through 12" diameter
sewers, the side sewer connection shall be constructed with a wye fitting in the
street sewer with a 45-degree elbow. For new 15" and larger pipes, or existing
sewers, the connection shall be made by machine made tap and suitable saddle,
unless otherwise approved by the Augusta Utilities Department.
Belled pipe shall be laid with the bell end up grade and in general, all pipe laying
shall start and proceed up grade from the point of connection at the street sewer or
other starting point. Pipe shall be laid in a straight line at a uniform grade
between fittings or on a uniform horizontal or vertical curvature achieved by
deflecting the pipe joints within the manufacturer's recommended limits. The
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-24
maximum deflection permissible at anyone fitting shall not exceed 45 degrees.
The maximum deflection of any combination of two adjacent fittings shall not
exceed 45 degrees unless straight pipe not less than 21f2 feet in length be installed
between such adjacent fittings or unless one of such fittings is a wye branch with
a cleanout provided on the straight leg.
14.24.7 Material for transition (e.g., PVC to DIP) shall be indicated and specified.
Where offset of DIP is required, mechanical joint DIP shall be installed with
mechanical joint heavy body DIP sleeves at the reconnections.
14.24.8
Sanitary Sewer Manholes:
Precast manholes shall conform to the latest edition of ASTM C-478 (five inch
wall thickness). Use six (6) inch wall thickness if manhole exceeds 20 feet in
depth. All holes for incoming and outgoing pipe will, whenever possible, be
precast, with pipe tie-in made using PS 1 0 flexible gasket, manufactured by
Press Seal Gasket Corporation, or approved equal. In the event ofthe necessity of
cutting new holes, the holes shall be machined cored neatly and carefully so as
not to damage the structural integrity of the manhole and large enough to allow
the insertion of a flexible rubber boot. Precast holes shall be flexible boot fitted.
Barrel joints shall be tongue and groove with performed plastic meeting the
requirements of Federal Specifications SS-S-0021O, "Sealing Compound,
Preformed Plastic Pipe Joints" Type I, rope form, also known as "Ram Neck."
Eccentric manholes cones are required. Inverts shall be constructed of3,000 psi
plant mix. Manhole steps shall be installed in all sections of each manhole as
indicated on the drawings. Frame and covers shall be cast or ductile iron and set
in a bed of mortar on the top of the manhole and completely grouted outside and
wiped smooth. Ring and cover shall be USF-170 or approved equal. Cover shall
read "Sanitary Sewer." Watertight manhole covers are to be used wherever street
11lnoff or high water may flood the manhole tops. Locked manhole covers may be
may be desirable in isolated easement locations or where vandalism may be a
problem.
Where corrosive conditions due to septlclty or other causes is anticipated,
consideration shall be given to prov~ding corrosion protection on the interior of
the manholes.
The minimum diameter of manholes shall be 48 inches; larger diameters are
required for large diameter sewers. A minimum access diameter of 22- 1f4 inches
shall be provided. .
Outside drop manholes shall be precast and constructed for incoming lines having
invert 24 inches or more above the invert of the manhole outlet, with DIP and tie
rods per Detail No. 14.08. Shallow manholes shall be precast or Type B slab top
precast and shall be constructed in accordance with ASTM C-478 (latest version).
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-25
14.22.11
14.22.12
Drop manholes should be constructed with an outside drop connection. Inside
drop connection (when necessary) shall be secure to the interior wall of the
manhole .and provide access for cleaning. Inside drop connections shall be used
only when approved by the Utilities Department Engineering Division.
Due to the unequal earth pressure that may result from the backfilling operation in
the vicinity of the manhole, the entire outside drop connection shall be encased in
concrete.
A bench shall be provided on each side of any manhole channel when the pipe
diameter(s) are less than the manhole diameter. The bench should be sloped no
less than 1f2 inch per foot (4 percent). No lateral sewer, service connection, or drop
manhole pipe shall discharge onto the surface ofthe bench.
All construction material shall be first quality, not previously used. Repair
clamps are not acceptable. Damaged or faulty pipe and materials must be
properly replaced. All gaskets shall be new. When connecting to existing
valves or fittings, gaskets shall be replaced, not reused.
The Engineer shall provide a complete set of shop drawings, which shall
indicate the Augusta Utilities Department's specific material requirements.
In general, material requirements will be guided by the latest versions of
the specifications of A WW A and ASTM.
14.25 SANITARY SEWER SYSTEM DESIGN
Design requirements are as follows:
14.23.1
14.23.2
14.23.3 .
14.23.4
14.23.5
14.23.6
14.23.7
14.23.8
14.23.9
Per Capita Flow, Average:
125 gallons per day (gpd)
Minimum velocity in collector sewer:
2.0 feet per second (fps)
Maximum velocity in collector sewer:
10.0 feet per second (fps)
Minimum collector sewer size:
8 inch
Infiltration Allowance:
25 gpdlin Diafmile
Ratio of Peak to Average flow:
2.5
Design depth offlow @PeakFlow:
0.75 of Full
Design Period:
30 Years
Minimum Manning's "n'.' Factor:
0.014
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-26
14.26 LIFT STATION DESIGN
All lift stations shall be installed underground, unless otherwise directed by the Utilities
Director. Wet well size and pump sizing shall be determined by a professional engineer,
after a comparative study has been done of the area surrounding the proposed
construction. Potential future development of the surrounding area should be
incorporated into the design. All potable water services around sewage pumping
facilities shall be provided with an approved reduced pressure backflow prevention
(RPZ) device.
All pipes entering the wet well and discharging from the wet well into the valve pit shall
be mechanical joint DIP. PVC pipe will not be permitted. Pipes shall be sized per the
design engineer's calculations and pump data.
14.24.1
14.24.2
14.24.3
Pumps, valves, and pipe sizes, shall be designed by a professional
engineer. Calculations for the design shall be submitted to the Augusta
Utilities Department for review and approval. Pump specifications shall
be provided to Augusta Utilities for review. Valves shall have a minimum
of a IS-inch clear zone in all directions.
The valve pit shall consist of a precast manhole cone section or a precast
concrete box; The bottom shall have 2-inch diameter pre-drilled holes
filled with gravel for drainage.
A cone section shall be set on a minimum 4-inch thick concrete slab with
an open bottom and gravel for drainage. For proposed piping, the
manhole shall have cored holes fitted with flexible rubber boots. Standard
ring and cover shall be installed and grouted to the cone section. The top
of the valve pit shall be a minimum of six (6) inches above finished grade.
Electrical systems and components (e.g., motor, lights, cables, conduits,
switch boxes, control circuits, etc.) in raw wastewater wells, or in enclosed
or partially enclosed spaces where hazardous concentrations of flammable
gases or vapors may be present, shall comply with the National and the
City of Augusta Electrical Code requirements. In addition, equipment
located in the wet well shall be suitable for use under corrosive conditions.
Each flexible cable shall be provided with a watertight seal and separate
strain relief. A fused.. disconnect switch located above ground shall be
provided. For the main power feed for all pumping stations. When such
equipment is exposed to weather it shall meet the requirements of
weatherproof equipment. One such equipment such as the control panel
shall be duplex NEMA 4X with audible and visible afarms. Lightning and
surge protection systems should be considered. A 110 volt power
receptacle to facilitate maintenance shall be provided inside the control
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-27
14.24.4
14.24.5
panel for lift stations that have control panels outdoors. Ground fault
interruption protection. shall be provided for all outdoor outlets.
Permanently-installed or portable engine-driven generating equipment
must be available for emergency operation of all lift stations. Generating
unit size shall be adequate to provide power for pump motor starting
current and for lighting, ventilation, and other auxiliary equipment
necessary for safety and proper operation of the lift station. The City of
Augusta must approve allowance for the operation of only one pump
during periods of auxiliary power supply. Special sequencing controls
shall be provided to start pump motors unless the generating equipment
has the capacity to start all pumps simultaneously with auxiliary
equipment operating. Where portable generating equipment or manual
transfer is provided, sufficient storage capacity with an alarm system shall
be provided to allow time for detection of pump station failure and
transportation and connection of generating equipment. Special electrical
connections and double throw switches shall be installed at all lift stations
where emergency power will be provided by portable generating
equipment. Design engineer and/or contractor shall coordinate type and
size of all permanent or portable generators with City of Augusta prior to
lift station construction.
Wastewater pumping stations and portable . equipment shall be supplied
with a .complete set of operational instructions, including emergency
procedures, maintenance schedules, tools and spare parts as may be
necessary .
CONSTRUCTION:
14.27 INSTALLATION
Authorization must be obtained from the Augusta Utilities Department to construct, alter
or modify a sanitary sewer line. . Construction of sewer infrastructure will be authorized
by the Utilities Department upon approval of submitted plans and notification of the
Augusta Utilities Department at least 24 hours prior to starting construction (706-772-
5503).
Installation of sanitary sewer pipe and associated appurtenances shall be in accordance
with current ASTM specifications and manufacturer's requirements for the specific
product. Loading or unloading and storage of pipe, fittings, valves, etc. shall be done
such that to avoid damage. All pipe shall be carefully examined before it is installed in
the trench. Damaged pipe or pipe which does not meet specification requirements shall
be rejected and removed from the work site. The interior of all pipe, fittings, valves, etc.
shall be kept free of dirt and foreign matter at all times. All piping shall be placed in a
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-28
dry trench with a stable bottom. Wet trench installation shall be allowed only upon
written approval of the Utilities Director.
Backfill shall be free of boulders and debris. Sharp or rocky material encountered in the
base shall be replaced with proper bedding. Pipe shall be laid on line and grade as
designed. Pipe joints, gravity blocks, service connections, and conflicts shall be left
exposed until visually inspected and approved by the Augusta Utilities Department's
Inspector.
All concrete cradles, saddles, or encasements shall be installed as shown on the plans.
These structures shall be constnicted in strict accordance to the details shown on the
plans. Concrete shall have a 28 day compressive strength of 3,000 psi when tested in
accordance with ASTM SpecificationC-39.
All manholes indicated on the plans shall be furnished and installed by the Contractor in
strict accordance with the plans. The invert channels shall be smooth and accurately
shaped to the semicircular bottom conforming to the inside of the adjacent sewer sections
as shown on the plans. Changes in direction of the sewer and entering branches shall
have as long a radius of the true curvature as the size of the manhole will permit.
The top of manholes shall be topped out with brick as indicated on the plans. The
number of courses will depend on the required elevation of the top of the manhole. The
maximum number of brick courses allowed shall be three (3).
New sewer lines shall be inspected through use of camera inspection equipment with an
Augusta Utilities Department Inspector at the time of installation and again before the
one-year warranty expires. The Developer is to provide the Augusta Utilities Department
with a color VHS system videotape of the inside of every reach of sanitary sewer
installed. The tape shall record manhole number to manhole number, date of recording,
and distance from start of run. The tape shall include a distance and location description
of every service line connection installed. The manhole numbering system shall be the
same as shown on the approved development plans.
14.25.1
Installation:
14.25.1.1 Sewer Pipe Laying: The pipe shall be laid with bell or groove end upgrade.
Pipe shall be tested for soundness, clear interior and satisfactory joint surfaces
before lowering the pipe into the trench. Pipe shall be laid in straight lines and
on uniform grades between points where changes in alignment or grade are
shown. The pipe barrel shall be uniformly bedded. The line and invert grade
of each pipe shall be checked from a top line carried on batter boards not over
25 feet apart or by use of a laser beam target inserted in each joint. Pipes shall
be laid to form a smooth, uniform invert. A stopper shall be installed in the
pipe mouth when pipe laying is not in progress.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-29
PVC gravity sewer pipe and force main shall be installed in accordance to
ASTM D2321, latest version. Ductile iron force main shall be installed in
accordance with A WW A C600, latest version.
14.25.1.2 Backfilling Around Pipe: As soon as the joint material has set, fine earth shall
be carefully tamped " around each joint, and around and over the pipe to a depth
of at least 2 feet above the top of gravity pipelines. In addition, all PVC sewer
pipe shall be bedded in selected material from the pipe centerline down to a
point 3 to 6 inches below the pipe invert. Selected materials for this purpose
shall be Class lor IT soils as specified in ASTM D232I.
14.25.1.3 Sewer Structures: Appurtenant sewer structures shall be constructed according
to one or more of the following methods:
14.25.1.3.1 Masonry: Brick for manholes and other sewer structures
shall be laid with shove joints completely filled with mortar.
Horizontal joints shall not exceed 2 inch, vertical joints 3 inch on
their interior face. In circular structures, all brick shall be laid as
header with joints broken between courses. Interior joints shall be
struck or wiped smooth with the face of the wall. The exterior of
sanitary sewer manholes shall be plastered to a thickness of at least
2 inch.
14.25.1.3.2 Laying Brick and Concrete Block Work: Only clean brick
or block shall be used. The brick or block shall be moistened by
suitable means, as directed, until they are neither so dry as to
absorb water from the mortar, nor so wet as to be slippery when
laid.
Each brick or block shall be laid in a full bed and joint of mortar
without repairing subsequent grouting, flushing, or filling, and
shall be thoroughly bonded as directed.
14.25.1.3.3 Plastering and Curing Brick or Block Masonry: Outside
faces of masonry shall be plastered with mortar from 3 inch to d
inch thick. Ifrequired, the masonry shall be properly moistened
prior to application of the mortar. The plaster shall be carefully
spread and troweled so that all cracks are thoroughly worked out.
After hardening, the plaster shall be carefully checked by being
tapped for bond and soundness. Unbonded or unsound plaster
shall be removed and replaced.
Masonry and plaster shall be protected from too rapid drying by
the use of burlap kept moist, or by other approved means, and shall
be protected from the weather and frost, all as required.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-30
14.25.1.3.4 Manhole Inverts: Manhole flow channels shall be
constructed of concrete, sewer pipe, brick or precast, and shall be
of semicircular section. Each manhole shall be provided with such
channels for all connecting sewers.
The inverts shall conform accurately to the size of the adjoining
pipes. Side inverts shall be curved and main inverts (where
direction changes) shall be laid out in smooth curves of the longest
possible radius which is tangent to the centerlines of adjoining
sewers.
14.25.1.3.5 Drop Manholes: Drop inlets shall be provided into
manholes on sanitary sewers for incoming lines having inverts 2
feet or more above the inverts of the manhole outlet lines. Drop
pipe and fittings shall be encased in masonry integral with the
manhole and extending from the manhole base to the top of the
incoming sewer. Diameter of drop manholes to be four feet at a
mInimum.
14.25.1.3.6 Setting Manhole Frames and Covers: Manhole frames
shall be set with the tops conforming accurately to the grade of the
pavement or finished concentric with the top of the masonry and in
a full bed of mortar so that the space between the top of the
manhole masonry and the bottom flange of the frame shall be
completely filled and made watertight. A thick ring of mortar
extending to the outer edge of the masonry shall be placed all
around the bottom flange. The mortar shall be smoothly finished
to be flush with the top of the flange and have a slight slope to
shed water away from the frame. Manhole covers shall be left in
place in the frames on completion of other work at the manholes.
14.25.1.3.7 Setting Precast Manholes Sections: Precast-reinforced
concrete manhole sections shall be set so as to be vertical and with
sections and steps in true alignment.
All holes in sections, used for their handling, shall be thoroughly
plugged with mortar. The mortar shall be 1 part cement to 12 parts
sand; mixed slightly damp to the touch until it is dense and an
excess of paste appears on the surface; and then finished smooth
and flush with adjoining surfaces.
14.25.1.4
Bulkheads and Flushing: The contractor shall build a tight bulkhead in the
pipeline where new work enters an existing sewer. The bulkhead shall
remain in place until its removaJ is authorized by the Engineer.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-31
14.25.1.5
14.25.1.6
14.25.1.7
14.25.1.8
Care shall be taken to prevent earth, water and other materials from
entering the pipe, and when pipe laying operations are suspended, the
Contractor shall maintain a suitable stopper in the end of the pipe and also
at openings for manholes. All sanitary sewer, except building connections
shall be flushed with water in sufficient volume to obtain free flow
through each line. All obstructions shall be removed and all defects
corrected. As soon as possible after the pipe and manholes are completed
on any line, the Contractor shall flush out the pipeline using a rubber ball
ahead of the water. None of the flushing water or debris shall be
permitted to enter any existing sewer.
Temporary Plugs: At all times when pipe laying is not actually in
progress, the open ends of the pipe shall be closed by temporary watertight
plugs or by other approved means. If water is in the trench when work is
resumed, the plug s4all not be removed until all danger of water entering
the pipe has passed.
Joints and Structure Rightness: All pipe joints shall be made as nearly
watertight as practicable. There shall be no visible leakage at the joints
and there shall be no sand; silt, clay, or soil of any description entering the
pipelines at the joints.
Leaks in the pipelines which cause infiltration or exfiltration to exceed
limits herein specified shall be repaired by replacing defective pipe.
Grouting and/or caulking to repair pipelines where excessive infiltration or
exfiltration is evident will not be permitted.
Fittings and Stoppers: Branches and fittings shall be laid by the
Contractor as indicated on the drawings and/or as directed by the
Engineer. Open ends of pipe and branches shall be closed with premolded
gasket joint stoppers which conform with the same requirements as pipe
being used.
Sewer Line Relation to Water Lines: Sewer lines and sewer force mains
in relation to water lines shall conform to "Ten States Standard" Section
29.3 at a minimum. Sewer lines shall have at least a 10 foot pipe-to-pipe
horizontal.separation from known or proposed water mains. When a
sewer crosses under a water main, there shall be at least 18 inches from
the crown of the sewer line to the bottom of the water main.
In all cases where adequate vertical separation as stated above cannot be
achieved (or whenever sewer lines must be installed to cross above a water
main), both the water and sewer lines shall be constructed of ductile iron
"pipe a distance of 10 feet on each side of their intersection with one full
length of water main centered on the sewer line.
Augusta Utilities Department
September 2000
Design Standards & Construction Specificationso
14-32
14.25.1.9
14.25.1.10
14.25.1.11
Minimum Cover for Sewer Lines: Gravity sewer lines shall have a
minimum of 3 feet of cover at the crown of the pipe. In cases where this
minimum cover cannot be achieved, ductile iron pipe shall be used.
Detectable Tape: Detectable tape as manufactured by Reef Industries of
Houston, Texas, or equal shall be installed during the backfill operation at
a point 1 foot below the final finished grade.
The detectable tape shall be a 5.5 mil composition film containing one
layer of metalized foil laminate between two layers of inert plastic film
specifically formulated for prolonged use underground. The tape shall be
highly resistant to alkalis, acids and other destructive agents found in the
soils.
The detectable tape shall bear a continuous printed message "Caution
Sanitary Sewer Line Buried Below." The message shall be printed in
permanent ink formulated for prolonged use underground. . Letters shall be
clearly legible and have a minimum height of 1.2 inches.
Boring and Jacking: Where required by the drawings, the sanitary sewer
line will be installed in a steel casing, placed by boring and jacking.
Where boring is required under highways, the materials and workmanship
will be in accordance with the standards of the State Highway Department
or local authority.
Boring and jacking under railroads will be governed by the latest A.R.E.A.
Standards, Part 5, "Pipelines" and those of the railroad involved.
14.25.1.11.1 Casing Pipe: The casing pipe shall conform to the
materials standards of ASTM Designation A252, with minimum
wall thickness of 0.219 inch. Steel pipe will have a minimum yield
strength of 35,000 psi. Casing pipe shall be joined together with
welded joints.
14.25.1.11.2 Carrier Pipe: The carrier pipe shall be ductile Iron as
specified herein.
14.25.1.11.3 Installation: Thesteel casing shall be installed by the "Dry
Bore and Jack" method. If voids develop or if the bored hole
diameter is greater than the outside diameter of pipe by more than
approximately 1 inch, remedial measures will be taken as approved
by the Engineer. "
When installing water lines through casing, the Contractor shall
mechanical joint pipe with retainer glands throughout the length of
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-33
the casing. The sanitary sewer line shall be strapped to treated
wooden skids with metal straps throughout the length of the
casing. The empty space shall then be filled with sand and the
ends of the casing shall be sealed with brick and mortar.
14.25.1.12
Force Main Installation: In general, sewer force main must be installed in
accordance with the water distribution system specifications."
Polyvinyl chloride (PVC) force main must conform to ASTM D-224I,
latest version.
Ductile iron force main must conform to ASTM A-377, latest version.
14.25.1.14
Removal and Replacement of Existing Pipe and Equipment: where
indicated on the drawings or required to properly place the work under this
contract, as approved by the Engineer, the Contractor shall remove and
replace such pipe lines and equipment in a manner as approved by the
Engineer.
14.25.2
INSPECTION INFILTRATIONIEXFILTRATION LEAKAGE TESTS
Upon completion of a section of the sewer, the Contractor shall dewater it and conduct a
satisfactory test to measure the infiltration or exfiltration for at least three consecutive
days. The amount of infiltration including "Y" branches, and connections shall not
exceed 1 00 gallons per inch diameter per mile of sewer pipe per 24 hours for gravity
sewer pipe. The amount of 50 gallons per inch diameter per mile of sewer per 24 hours
shall not be exceeded for ductile iron pipe. The Contractor shall be responsible for the
satisfactory watertightness of the entire section of sewer.
As required, suitable bulkheads shall be installed to permit the test of the sewer. Where
the ground water level is less than 1 foot above the top of the pipe at its upper end, or as
directed by the Engineer, the sewer shall be subjected to exfiltration testing by plugging
the pipe at the lower end and then filling the pipelines and manholes w~th clean water to a
height 4 feet above the top of the sewer at its upper end. The leakage out of the sewer,
measured by the volume of the water necessary to maintain meter level in the highest
manhole, shall not exceed 200 gallons per inch diameter per 24 hours per mile of sewer
for gravity sewer pipe. The amount of 50 gallons per inch diameter per 24 hours per mile
of sewer shall not be exceeded for ductile iron pipe.
The sewer shall be tested before any connections are made to buildings or to active
sewers .
The Contractor shall construct such weirs and bulkheads as may be required, shall furnish
all water, labor, test plugs, power, pumps; meters, and other equipment necessary for the
test to be properly made. "
Augusta Utilities .Department
September 2000
Design Standards & Construction Specifications
14-34
The Contractor may use a low pressure air test as an option to the hydraulic
infiltrationlexfiltration leakage test for gravity lines provided the Contractor established a
correlation between the air test results and the quantity of infiltrationlexfiltration actually
being experienced by the line and the allowable air pressure drop shall be that
corresponding to the allowable hydraulic leakage specified previously in this section.
Such a correlation is to be established according to a procedure satisfactory to the
Engineer. The low pressure air test shall be performed in accordance with the applicable
sections of the Uni-Bell UNI-B-6-90, latest version.
If the Contractor opts to use the low pressure air test, leakage tests on manholes shall be
conducted independently of the lines by using a hydraulic infiltrationlexfiltration test as
directed by the Engineer. The allowable infiltration into the manhole over a 24 hour
period is zero and the allowable exfiltration is also zero when tested by plugging off the
manhole and filling it with water four feet above the top of the sewer and measuring the
water loss over a 24 hour period.
14.25.3
MEASUREMENT AND PAYMENT
Payment will be made at the unit contract prices as shown in the bid schedule under
Sanitary Sewer.
Measurement of pipelines shall be the actual number of linear feet of pipe installed,
complete in place and accepted. No deductions in length will be made for manholes.
Measurement of manholes will be the vertical dimension to the nearest tenth of a foot
from the invert of the outlet pipe to the top of the manhole cover ring casting.
Concrete encasement will be paid for at the contract unit price, per cubic yard, for the
actual volume of concrete placed, up tothe volume of concrete required by the maximum
dimensions for concrete encasement shown on the plans. Concrete in the excess of that
volume will not be paid for.
No separate payment will be made for any special fittings, tie-ins, or connections, nor
will any separate payment be made for normal bedding of sewer pipe.
Service lines will be paid for at the unit contract price as shown in the bid schedule under
Sanitary Sewer, complete as shown on the plans
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-35
SECTION 14C
EXCAVATION & BACKFILLING
14.26 SCOPE
This section covers all excavation, trenching and backfilling for pipe lines, complete.
14.27 EXISTING IMPROVEMENTS
The Contractor shall maintain in operating condition and protect from damage all existing
improvements including utilities, roads, streets, sidewalks, drives, power and telephone
lines, gas lines, water lines, sewers, gutters and other drains encountered, and repair to
the satisfaction of the Engineer any aerial, surface or subsurface improvements damaged
during the course of the work. Where and if shown on the plans, the locations and
existence or nonexistence of underground utilities are not guaranteed. The Contractor
shall contact the various utility companies to determine and/or verify such information
prior to proceeding with the work. He shall make reasonable and satisfactory provisions
for the maintenance of traffic on streets, drives, walkways and at street crossings and if
necessary to provide temporary walkways and bridges for crossing of the open trench as
directed.
14.28 EXCAVATION
All excavation of every description and of whatever substances encountered shall be
performed to the depths indicated on the drawings or as specified herein. Excavation
shall be made by the open cut method except as otherwise specified or shown on the
drawings. Excavation methods shall generally meet or exceed Occupational Safety and
o Health Administration (OSHA) construction industry standards.
All excavated materials not required for fill or backfill shall be removed and wasted as
directed. The banks of shallow trenches shall be kept as nearly vertical as practicable and
where required shall be properly sheeted and braced. Except where otherwise indicated,
trench bottoms shall be not less than 12 inches wider nor more than 16 inches wider than
the outside diameter of the pipe to be laid therein, and shall be excavated true to line, so
that a clear space of not less than 6 inches nor more than 8 inches in width is provided on
each side of the pipe. The bottom of trenches shall be accurately graded to provide
uniform bearing and support for each section of the pipe on undisturbed soil at every
point along its entire length, except for portions of the pipe sections where it is necessary
to excavate for bell holes and for the proper sealing of pipe joints. Bell holes shall be dug
after the trench bottom has been graded. Bell holes shall be excavated only to an extent
sufficient to permit accurate work in the making of the joints and to insure that the "pipe,
for a maximum of its length will rest upon the prepared bottom of the trench.
Augusta Utilities Department Design Standards & Construction Specifications
September 2000
14-36
Depressions for joints other than mechanical shall be made in accordance with the
recommendations of the joint manufacturers for the particular joint used. Excavation for
structures and other accessories shall be sufficient to leave at least 12 inches in the clear
between their outer surfaces and the embankment or timber which may be used to hold
the bank and protect them~ Where damage is liable to result from withdrawing sheeting,
the sheeting will be ordered to be left in place. Except at locations where excavation of
rock from the bottoms oftrenches is required, care shall be taken not to excavate below
the depths indicated. Where rock excavation is required, the rock shall be excavated to a
minimum overdepth of 4 inches below the normal required trench depth. The overdepth
rock excavation and all excess trench excavation shall be backfilled with loose, moist
earth, thoroughly tamped. Rock is defined as materials which are so hard or cemented
that the excavation of such material requires blasting. The excavation shall proceed in a
conventional manner with satisfactory effort made to remove hard materials before the
Engineer makes a determination of need for blasting. Predrilling and blasting will be
allowed, if the Contractor can provide evidence for the Engineer's review that boring logs
can and will show that the material can or cannot be excavated. Evidence will be
provided for the Engineer's review and approval before predrilling and blasting is
undertaken. The excavation and removal of isolated boulders or rock fragments larger
than one cubic yard in volume encountered in materials of common excavation shall be
classified as rock excavation. Whenever wet or otherwise unstable soil that is incapable
of properly supporting ~he pipe, as determined by the Engineer or indicated on the
drawings, is encountered in the trench bottom, such soil shall be removed to a depth
required for the lengths designated by the Engineer, and the trench backfilled to trench
bottom grade, as herein specified, with coarse sand, fine gravel, or other suitable material.
Backfill with earth under structures will not be permitted and any unauthorized excess
excavation below the levels indicated for the foundation of such structures shall be filled
with sand, gravel, or concrete, as directed.
14.28.1 Grading and Stacking: All grading in the vicinity of trench excavation
shall be controlled to prevent surface ground water from flowing into the
trenches. Any water accumulated in the trenches shall be removed by pumping or
by other approved methods. During excavation, material suitable for backfilling
shall be stored in an orderly manner a minimum distance of one and one-half
times the depth of the excavation back from the edges of trenches to avoid
overloading and prevent slides or cave-ins. Material unsuitable for backfilling, as
determined by the Engineer, shall be removed from the job site and disposed of
by the Contractor in a manner as approved by the Engineer.
14.28.2 Shoring and Sheeting: All shoring, sheeting, and bracing required to
perform and protect the excavation and to safeguard employees and the public
shall be performed. The failure of the Engineer to direct the placing of such
protection shall not relieve the Contractor of his responsibility for damage
resulting from its omission.
Whenever sheeting is driven to a depth below the elevation of the top of the pipe,
that portion of the sheeting below the elevation of the top of the pipe shall not be
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-37
disturbed or removed. Sheeting left in place shall be cut off not less than 1 foot
below finished grade. No sheeting shall be removed until the excavation is
substantially backfilled as hereinafter specified.
14.28.3 Water Removal: Where water is encountered, it shall be prevented from
accumulating in excavated areas by pumping, well-pointing and pumping, or by
other means approved by the Engineer as to capacity and effectiveness. Water
removed from excavations shall be discharged at points where it will not cause
injury to public or private property, or the work completed or in progress. Under
no circumstances shall trench bottoms be prepared, pipes laid, or appurtenances
installed in water. Water shall not be allowed to rise in unbackfilled excavations
after pipe or structures have been placed.
14.28.4 Blasting: Explosives are to used only within legal limitations. Before
explosives are used, all necessary permits for this work shall be secured and all
precautions taken in the blasting operations to prevent damage to private or public
property or to persons. The Contractor shall assume full liability for any damage
that may occur during the use of explosives. No blast shall be set off within 50
feet of pipe already laid in the trench.
14.28.5 Tree Protection: Care shall be exercised to protect the roots of trees to be
left standing. Within the branch spread of the tree, trench shall be opened only
when the work can be installed immediately. Injured roots shall be pruned
cleanly and backfill placed as soon as possible.
14.29 BACKFILLING
Trenches and other excavations shall not be backfilled until all required tests are
performed and the work has been approved by the Engineer. The trenches shall be
carefully backfilled with the excavated materials approved for backfilling consisting of
earth, loam, sandy clay, sand and gravel, soft shale, or other approved materials. No
material shall be used for backfilling that contains mulch, other unstable materials,
stones, blasted rock, broken concr~te or pavement, or other hard materials having any
dimension greater than 4 inches; or large clods of earth, debris, frozen earth or earth with
an exceptionally high void content.
For backfill up to a level 1 foot over the top of pressure pipelines and 2 feet above the top
of gravity pipelines, only selected materials shall be used. Select materials shall be finely
divided material free from debris, organic material and stone, and may be suitable job
excavated material or shall be provided by the Contractor from other sources. The
backfill shall be placed in uniform layers not exceeding 6 inches in depth. Each layer
shall be moistened and carefully and uniformly tamped with mechanical tampers or other
suitable tools. Each layer shall be placed and tamped under the pipe haunches with care
and thoroughness so as to eliminate the possibility of voids or lateral displacement.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
. 14-38
The remainder of the backfill material shall then be placed and compacted above the level
specified above. In areas not subject to traffic, the backfill shall be placed in 12 inch
layers and each layer moistened and compacted to a density approximating that of the
surrounding earth. Under roadways, driveways, paved areas, parking lots, along roadway
shoulders and other areas subject to traffic, the backfill shall be placed in 6 inch layers
and each layer moistened and compacted to density at least equal to that of the
surrounding earth so that traffic can be resumed immediately after backfilling is
completed. Any trenches which are improperly backfilled, or where settlement occurs,
shall be reopened to the depth required for proper compaction, then refilled and
compacted with the surface restored to the required grade compaction.. Along all
portions of the trenches not located in roadways, the ground shall be graded to a
reasonable uniformity and the mounding over the trenches left in a neat condition
satisfactory to the Engineer. "
Sheeting not specified to be left in place shall be removed as the backfilling progresses.
Sheeting shall be removed in such a manner as to avoid caving of the trench. Voids left
by the removal of sheeting and shoring shall be carefully filled and compacted.. Where,
in the opinion of the Engineer, damage is liable to result from withdrawing sheeting, the
sheeting will be ordered to be left in place.
14.30 BORING AND JACKING
Where required by the drawings, the pipeline will be installed in a steel casing, placed by
boring and jacking. Where boring is required under highways, the materials and
workmanship will be in accordance with the standards of the State Highway Department
or local authority. Boring and jacking under railroads will be governed by the latest
A.RE.A. standards and those of the railroad involved. The steel casing shall be in
accordance with ASTM A252 to the thicknesses shown on the drawings.
14.31 PAVEMENT REMOVAL AND REPLACEMENT
Where necessary existing pavements shall be removed and replaced, the applicable
standards of the State Highway Department or local authority shall govern this work.
Joints shall be sawed, unless joints equally uniform in the opinion of the Engineer result
" from other means. All pavement repairs shall consist of a concrete slab no less than 6
inches thick or compacted graded aggregate at least 9 inches thick, as indicated on the
drawings. Where the parent pavement is concrete, the slab surface shall be smoothly
finished flush with the surrounding pavement. Where the parent pavement is asphalt, the
concrete slab shall be raked finished and topped with 1 inch of surface mix asphalt
paving rolled flush with the surrounding pav"ement.
14.32 MEASUREMENT AND PAYMENT
Excavation and backfilling for pipelines and appurtenances, except as hereinafter
provided for, will be considered as incidental to the construction of the various elements
of the installation it is associated with, and no separate payment will be made therefor.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-39
When made at the direction of Engineer, overcut, rock excavation and backfill to
compensate for rock will be made at the unit contract price for rock excavation per cubic
yard measured in place.
When made at the direction of the Engineer, overcut and backfill to compensate for
inadequate foundation will be paid for at the unit contract price for overcut and clean
stone bedding, per ton of stone.
Sheeting ordered to be left in place will be paid for at the unit contract price for sheeting
left in place, per board foot.
Joints in pavements will not be paid for separately. Pavement removal and replacement
will be paid for at the unit contract price therefor, per square yard.
-,
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-40
SECTION 14D
PLAN. SUBMITTAL
Water Construction Plans:
Water Construction Plans submitted to the Augusta Utilities Department for review must
contain the following at a minimum:
o Project Name
o Developer's name, address, and phone number
o Owner's name, address, and phone number
o Design professional's name, address, and phone number
o Design professional's signed seal
o LocationlVicinity Map
o "North arrow on all applicable sheets
o Scale (minimum 1" = 20'; maximum 1" = 100')
o Show subject property information including subdivision name, lot numbers, block
letters, property owners, etc.
o Show adjacent property information including subdivision name, property owners,
etc.
o Show existing conditions, structures, pavement widths, right-of-way widths,
easements, adjoining roads, etc.
o Show the locations, size and material of exi~ting water mains along with other
appurtenances. Existing water lines shall be shown as dashed lines.
o Show the location, size and material of proposed water mains, valves, hydrants and
service lines along with all other water appurtenances involved with the proposed
project. Proposed water lines shall be shown as solid lines.
o Number all fire hydrants.
o Show locations, type and size of all backflow prevention devices.
D Label all easements with respect to type and size.
D Show easements shaded-in to be dedicated to the Augusta Utilities Department for
water lines installed outside proposed right-of-ways.
Sanitary Sewer Construction Plans:,
Sanitary Sewer Construction Site Plans submitted to the Augusta Utilities Department for
review must contain the following at a minimum:
o Project Name
o Developer's name, address, and phone number
o Owner's name, address, and phone number
o Design professional's name, address, and phone number
o Design professional's signed seal
o LocationlVicinity Map
Augusta Utilities Department Design Standards & Construction Specifications
September 2000
14-41
D North arrow on all applicable sheets
D Scale (minimum 1" = 20'; maximum 1" = 100')
D Show subject property information including subdivision name, lot numbers, block
letters, property owners, etc.
D Show adjacent property information including subdivision name, property owners,
etc.
D Show existing conditions, structures, pavement widths, right-of-way widths,
easements, adjoining roads, etc.
D Show the locations, size and material of existing sanitary sewer lines and force mains
along with other appurtenances. Existing sewer lines shall be shown as dashed lines.
D Show the proposed location, size and material of sewer mains, force mains, manholes,
service lines with clean-outs and sewerage lift stations involved with the proposed
project. Proposed sewer lines shall be shown as solid lines.
D Creek crossings require full scale details at 1" = 20' scale minimum, including piers,
collars and all other appurtenances.
D Show easements shaded-in to be dedicated to the Augusta Utilities Department for
sanitary sewer lines installed outside of proposed rights-of-way.
D Show easements dedicated to the Augusta Utilities Department for sanitary sewer
lines to serve adjacent properties.
Plan and Profile:
.
Plan and profile sheets shall be provided for all sanitary sewers (except service laterals).
Profiles shall have a horizontal scale of not more than 1" = 1 00' and a vertical scale of
not more than 1" = 1 0'. The plan view should normally be shown on the same sheet as
the profile. Plan and profile view should have line designations, station numbers,
manhole numbers and any other indexing necessary to easily correlate the plan and
profile views.
Plan and Profiles shall show the following:
D Location and names of streets, sewers and drainage easements
D Line of existing and proposed ground surface, the grade of the sewer between each
two adjacent manholes, invert of sewer in and out of each manhole (label as
directional if more than 2 pipes connected to manhole), and surface elevation of each
manhole. All manholes shall be numbered on the plan and correspondingly
numbered on the profile. The station number shall be shown for each manhole.
D The location and elevation of adjacent parallel stream beds and of adjacent water
surfaces shall be shown on the plan and profile.
D Sizes, locations and inverts of all special features such as connections to existing
sewers, wet wells, concrete encasement, collar walls, elevated sewers, piers, special
manhole covers such as vented outfall or sealed covers, etc.
D All structures, both above and below ground, which might interfere with the proposed
construction, particularly water mains, gas mains, storm drains, utility conduits, etc.
Identify pipe crossings with letter, or other, designation on the plan and profile.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-42
Specify top of pipe and bottom of pipe elevations at crossings to verify there is no
conflict. See Section 14.21.11.
General Notes: "
Notes to be shown on Site Plans include:
1. The Developer and/or Developer's Contractor is responsible for verifying the exact
location, size and material of any existing water or sewer facility proposed for
connection or use by this project.
2. All construction of water and sanitary sewer lines shall be in accordance to Augusta
Utilities Department's Standards and Specifications.
3.. All water lines shall be class 200 PVC meeting A WW A C-900, unless otherwise
shown.
4. All water lines are to be tested, chlorinated, and checked for bacteria.
5. Augusta Utilities Engineering Department shall be notified 24 hours prior to any
construction, tie.:.ins, or testing of water or sanitary sewer lines. (706-772-5503) If no
answer leave message.
6. Copper Wire (12 gauge, Bare Single Strand) shall be attached along top of all buried
PVC water lines, wrapped around service corporations and stubbed up into all valve
boxes for locating purposes.
7. Per Augusta Utilities Specifications for backflow installations for non-residential
development, a minimum "Double Check" Backflow device shall be installed on the
customer's side of all service lines (domestic, irrigation and fire). Fire lines require a
" "Detector Type" backflow device. Backflow Devices shall be tested by a certified
person within 5 working days of installation and the results furnished to the Utilities
Engineering Depaftment within 10 working days of installation prior to any water
use.
8. Per Augusta Utilities Specifications for backflow installations residential
development shall install a "Dual Check" Backflow Device on the customer's side of
service line at the point oftie-in to the water meter.
9. All water valves on the main lines, including hydrant laterals, shall be: open-left if
installed south of Gordon Highway (SR 10); or open-right if installed north Gordon
Highway.
10. The - Developer and/or Contractor shall furnish and install an approved meter box
(Rome type 10" x 19" x 10" cast iron or approved equal) at the termination point of
" all water services and maintained until such time as meter is installed.
11. All water meters shall be purchased from the August Utilities Department.
12. Maximum sanitary sewer infiltration shall not exceed 1 00 GPD/inch of pipe diameter
per mile. _
13. All tie-ins to existing manholes shall be cored. All manholes require "K or N Seal"
or equal rubber boots.
14. No connection to existing sanitary sewer lines until the proposed sewer line is
inspected and approved -by the _Augusta Utilities Engineering Department.
15. Sanitary sewer clean-outs shall be installed at all individual services as shown in
detail and installed as not to be u!1der driveways.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-43
16. Finished floor elevations of all proposed buildings shall be a minimum of five (5) feet
above the invert elevation of the sanitary sewer main! manhole at the point of tie-in
17. Provide 0.1 foot drop across all sanitary sewer manholes.
IS. Sewer force main shall be PVC C-900, class 200 or D.I.P. and shall have 12 gauge
bare single strand wire attached along the top of the main.
19. A minimum 15' Utility Easement Centered over all water lines and a minimum 20'
Utility Easement centered over all sanitary sewer lines shall be deeded to the
Augusta-Richmond County at completion and acceptance of said lines.
20. Disturbance to any Survey Markers or Monuments requires re-establishment by a
licensed surveyor at the Contractor's expense.
21. For private developments, the Developer/Owner shall be responsible for pavement
patching/replacement and the site restoration whenever Augusta Utilities Department
must repair/replace utilities on the property. The developer shall arrange for access by
the Augusta Utilities Department as required to make the repair/replacement of the
utility
22. Contractor shall contact the Utilities Protection Inc. "Call Before You Dig" service in
order to locate utilities prior to starting any excavation or construction.
23. If in the course of construction, a conflict arises between the new work and the
existing water and sewer facilities, it will be the responsibility of the
OwnerlDdeveloper, at his expense, to correct same as directed by a representative of
Augusta Utilities Department.
Details:
The detail drawings at the end of this Section shall be included with the construction
drawings.
Record (As-Built) Drawings:
At the completion of the water and/or sanitary sewer construction and prior to recording
the final plat, the Contractor shall.furnish the Augusta Utilities Department's Inspector
with Record Drawings of the project. The Record Drawings must show all field changes
made to the approved drawings. Record Drawings shall be prepared by a registered
surveyor and/or professional engineer and submitted in digital format, as well as hard
copy. Acceptable digital formats include ArclInfo, ArclInfo export file, or a DXF file
generated by AutoCad from the DWG file.
All Digital Record Drawings submitted must conform to:
Projection: Georgia State Plane East
Datum: NADS3
Units: Feet
A Data Dictionary should be included with each DXF file defining individual layers.
Water record drawings shall be a separate plan from the sewer record drawing.
Maximum plan size shall be 24" x 36". Scale shall be no larger than 1" = 20' and no
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-44
smaller than 1" = 1 00'. No hand-drawn or marked up construction plans will be accepted
as record drawings. "AS-BUILT DRAWING" shall be stamped in large print on the
plan. If the project is a phase of a subdivision, a location sketch of the entire subdivision
with subject phase outlined shall appear on drawings.
Record drawings shall contain the following information:
a Developer's name, address, and phone number.
a Contractor's name, address, and phone number.
o Lot numbers.
a Road names and right-of-way widths.
a Water and sanitary easements.
a All water service locations and distances from both front property corners of serviced
lot.
o All sanitary sewer services with clean-outs and distances from both property corners
of serviced lot and from nearest manhole.
o Invert and top elevations of all manholes.
Acceptance of Work:"
Once an approved Record Drawing, final inspection and final plat with maintenance
agreement is recorded, the Augusta Utilities Department will accept the new constructed
system. The Developer/Owner shall be responsible for any defects in materials or
workmanship within the subject system for a period of twelve (12) months from the date
of the maintenance agreement.
IMPORTANT: A note stating that- Augusta Utilities shall not be responsible for
. pavement repair or site restoration associated with repair/replacement of a water or sewer
line shall be included on allfiilal plats for private developments.
Augusta Utilities Department
September 2000
Design Standards & Construction Specifications
14-45
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CARSON IND. SERIES 1730D BOX W/COVER"
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TIGHTl.Y PACKED CLEAN
GRAVEL TO PREVENT THE
BOX FROM SETTLING
*NOTE: OTHER TYPES. OF INSTALLATION
MAY BE NECESSARY DUE TO VARYING
FIELD CONDITIONS. CONSULT WITH
INSPECTOR BEFORE INSTALLING.
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TOP VIEW
. TAPPING VALVE. SHAll. BE A l.4uEii.ER T-23S0 RESlUENT ~~-FL X WJ ENOS-
OR APf>RO~ EQUAL
TAPPING st.EEVE: SHAll. BE A WUEl..lDl H-S1S. t.lJ-OR APPROVED EQUAL
, NO.SS REPAIR CLAMPS OR MJ SPUT SLEEVE:S WIll. BE ACCEPic:D
SIDE
VIEW
--
-.-
TAPPING SlEEVE: AND VALVE SHALl. BE PRESSURE ~"Tal f"OR 1 HOUR PRIOR TO
TAPPING THE EXISTING WAIN. THE COUNTY INSPECTOR SHALl. BE PRESENT DURING TESTING.
All. TESTlNG SHALL BE I.A.W. SECTION 15.028 Of THE COUNTY SPECFlCATIONS.
TESTING PRESSURE SHALl. BE 200psi
T A.PPING
VAL VE-
AND
SLEEVE
AUGUSTA-UTlUTlES ENGINEERING DEPARTMENT
. 2760 PEACH ORCHARD ROAD
AUGUSTA, GA 30906
(706) 771"-2648 FAX (706) 771-2646
DETAIL NO.
13.18'
REViseD 3/99
~.
- -
,,/
s. WAX,
6. l.4IN.
<oJ
Z
o
N
HAUNCHING
<oJ
~ BEDDING
C0t.4P ACTED BACI<Flll.
PER SECTION 11
", .".
.. .... :~. '...::~. r.. '..' . ~ : .' .:.
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T'rPE .), 1A-1A3 SEl....ECT REFlL.J.. IoIAY BE REQUIRED ~ t
SEE SECTION 11.0620 ~ :::J
[1.'
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ON
U .
X
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<:::E
z'
[;:~
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N :i
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AND COI.IPACTEO BAO<F1L.J..
CtASSES 2 OR J
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F'OUNDAilON IoIAY BE REQUIRED
SEE SECTION 11.05+
ClASS 1 BEDDING
NO. 57 STONE
TRENCH .EXCAVATION, BAO<FlL.J.. AND COlolPACllON SHAll. BE IN STRICT
CONFORI.IAN~ \'11TH SECllON 11 OF iHEA:c.hmoAl6U.U..ty. SPEClFlCAllONS.
~
TYPICAL TRENCH
DETAIL FOR
EXCAVATION/BACKFILL
SANITARY SEWER
AUGUSTA-UTlUTlES ENGINEERING DEPARTMENT
2760 PEACH ORCHARD ROAD
AUGUSTA, GA 30906
(706) 771-2648 FAX (706) 771-2646
DETAIL NO.
13'.20'
REVISED 3/99
./.
USE A MAXIMUM OF 3
BRICK COURSES AS RE-
QUIRED TO ADJUST TO
FINISHED GRADE
NOTE: DROP MANHOLE TO BE
USED WHERE INLET AND
OUTLET I.E. DIFFERENCE
IS GREATER THAN 2.0'
BRICK DAM NOT
LESS THAN 2/3
D2
r
C-
o~
o 0 0 00
j
SECTION c-c
-....
GROUT
=
PRECAST CONCRETE
=
=.
" .. .
=
=
~1 Joint DIP
, .-L
N
Cl
--r
DROP PIPE TO BE
Ductile Iron of
NEXT STD. SIZE
SMALLER THAN
D2 (6" MIN.)(TYP.)
Min.
. ..--
. .,
.... :
= N
.~.
=
=
DIP DROP TO
BE ENCASED
IN STONE
. .;,
'. ~ ........ ..
C
TYPICAL SECTION
DROP MANHOLE
N.T.S.
AUGUSTA-UTIUTlES ENGINEERING DEPARTMENT
2760 PEACH ORCHARD' ROAD
AUGUSTA, GA 30906
(706) 771-2648 FAX. (706) 771-2646
DETAIL NO.
1"3.08
REVISED ;3/99
,,:
" FREAKOUT PRECAST Of' INC TO FIT OVER PIPE I
o
NO. + REBARS 12- ON CDf~ BOiH WA'tS
FROlT VIEW
AOOI110NAL RISERS AS RECUIRED
24- PRECAST RISER
~18 -p-
...., -b-
0 0 0 0 0 0
SlOE VIEW.
-
BAst: OIMENSlONS
LENC'll-i (1oIIN) 8'
WIDTH 6'
iHlCXNESS 6- PRECAST
o
-
N01ES:
1. CON~ETE TO Be: POURED TO 'll-iE SPRlNCUNe:. OF THE PIPE (PRECAST ONLY).
2; .CONS1RUCll0N SHALl. BE IN ACCOROANa: 'MlH SEC110NS 8,. n, AND 13 OF THE Ii\;C~l'\o,.d~Tl' SPEClFlCAnONs.
AUGUSTA-U11UllES ENGINEERING DEPARTMENT
2760 PEACH ORCHARD. ROAD .
AUGUSTA, GA 30906
(706) 771-2648 FAX (706) 771-2646
CONN.ECTOR MANHOLE
. ._.__.___._._._~~. n_._
DETAIL NO.
1'3'~07
REVISED .3/99
./
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AUGUSTA-UTlUTlES ENGINEERING. DEPARTMENT
"2760:PEACH-ORCHARD ROAD
AUGUSTA, GA 30906.
(706) 771-2648' FAX (706) 771-2646
DETAIL NO.
13'. 13'
REVISED 3/99
AUGUSTA-U:nUl1ES ENGINEERING DEPARTMENT
2760 PEACH ORCHARD ROAD
AUGUSTA, GA: 30906.
(706) 771-2648 FAX (706) 771-2646
1 l/B"
A
I- 10 3/4" A -I
12-.
r ~u ~
u~
STEP SHALL BE MANUFACTURED BY OU~ TIRE AND RUBBER COt./PANY
OR APPROVED EOUAL
5 :.5/+.
MANHOLE S.TEP
~
,..,
,..,
'ao
.......
a>
1 1/4"
-
DETAIL NO.
1'3"0.3
REVISED 3/99
w;
A.-J
P LAN
WAHHQ.( FRAlol( TO BE U.S F"OUIClIlY Il6ll RING . IC1. c::cr..€R
SEE :C:C11ON '3..08
8"a-l/4" TOP
CRAOE RING
S.l<2-1/4..CRAOE
RINGS I.S REQUIRED-
NO BRIO<
CONCRETE:
TO 2/!1:)
1~
0"
e'-O" SQ.
HO"TtS:
1. WAHHa..c; S' OR u::ss IN DEP1l< USE A, r -0" CONCDImlC cONe:
:C:C11ON.
2. USE G" WllU. MCKNESS F. WloHHo...E 0= 20' DO'1l<.
J. IN'WERT QJRVA,1VR( TO HA"'!: I.S LONe A. RADIUS I.S POSSIIll.E..
4. CONe. TO BE F'OJRfD TO THE:. SPRINC UNE r:A" THE: F'F'E:
(PRECAST ONL 1'). .
.....-
SECTION "A-A"
A
J
<l <1.
AUGN TOP W / STEPS
<l
()
..
6
PRECAST BOX
SHALLOW MANHOLE
AND
I.IANHOLE: CONSTRUCllON O~ EXIS11NG SEWER
AUGUSTA-UTlUTlES ENGINEERING DEPARTMENT
2760' PEACH ORCHARD ROAD
AUGUSTA, GA 30906
(706) 771-2648. FAX (706) 771-2646 .
DETAIL NO.
13..06
REVISED 3/99
'V
'V
'V
1 1/2. MIN. PiPE: STRAP w/ ANCHOR 80l. TS IN CONCRETE
USE MEGA-LUGS AND CONCRETE 8LOO</NG-NO RooD/NG REQUIRED
~
I
f
I
I
I
-
CLAMPS" ,AND TIE RODS
AUGUSTA-UTlUllES ENGINEERING DEPARTMENT
2760 PEACH ORCHARD ROAD .
AUGUSTA, GA 30906
(706) 771-264'8 FAX (706) 771-2646
..;;::;--
DETAIL NO.
13.1"5'
R~lsED.3/99
if
NON-SHRINK
GROOT (TYP.)
."
UJ
Z
o
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u
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I LENGlHS
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..1 :.:
14-
t./ANHOlL RING SHAlL BE USi"-668 k KL COVER
LOAD RATING-HEAVY DUiY
24.
1.0.
S"x2-1!4" GRADE
RINGS AS REQUIRED
l.tAHHOLE S1tJ>
(SEE SPECS)
A
.
...I
AlL .!aNTS TO BE
SEAU:Il W1lH PRE-.
F" ORIolEDPl...ASil C
GASKET. "RAMNECX",
OR APPROVED EQUAL
...
".
.
A.I'
P LAN
I:::
" ::E
4'-0"1.0.
SANITARY
~
STAlNLLSS
S1EEl.. Cl...AIoIP
liTER-TIGHT
FU:XlBLE BOOT
~-
1. USE 6" WALL TI-lICXNESS IF" I.lANHOLE EXct:EDS 20' DE?lH.
2. INVERT CURVAruRE TO HAVE AS LONG A RADIUS AS POSSIBLE.
J. t./.H. STI:?S-EACH "-0" O.c. \,lAX. F"OR ADDIi10NAL NO'lO SEE STD. 13.00
':--..
SECTION DA_A~
PRECAST MANHOLE DETAILS
,
--- "- - .
---~-
AUGUSTA-UTIUTIES ENGINEERING DEPARTMENT
2760 PEACH ORCHARD ROAD
AUGUSTA~ GA 30906
(706) 771-2648 FAX (706) 771-2646
DETAIL NO
13. OS'
REVISED 3/99
.J.
fOlD< HOLE
VENT
I 2J 1/2.
~ I I
l~
SECTION Of" covrn
~T
P LAN
r-U"~
I .
H" ou~~ "~')j [ill]S ~
~.... is. ~I
, H,l,LF SE. CT H AtF El.EV
33 1/4-
BOL lED WA 1ERilGHT FR.......E ae COVER
U.5. FOUNDRY IJSF 668 RING at. eWT CO~
CO'S T'l'PE-8WT
LOAD RA TlNG-HEA V"f DUTY
---"
FRANE
STANDARD CO~
U.S. FOUNDRY ~Sf 668 RING /k. KL CO~
CO~ T'r'PE-KL
LOAD RA ilNG-HEA V'f DUTY
'rf:NT H<U: LOCA TlON ORIU.ED !oS SHOv.t4
-
APPROXIMA IT WEIGHT
FRAl.CE 160
COVER 125
TOTAl 285
MANHOLE FRAME & COVER.
incl. BOLTED WATERTIGHT
,
AUGUSTA-UllUTtES ENGINEERING DEPARTMENT
27GO PEACH ORCHARD ROAD
AUGUSTA, GA 30906
(70G) 771-2648 FAX (706) 771-2646
DETAIL NO.
1'3.04
REVISED 3/99
."
I
REACTION
BLOCKING
</;
. ...1
MINIMUM 0.5 Cu. Yd.
I
I
I
NOTI:S:
1. DO NOT 'ALLOW CONCRETE TO COVER BOLTS, GLANDS. RINGS OR NUTS.
2. ALL PLUGS, CAPS, TEES, WYES AND AT BENDS MORE THAN 11 1/4' .
SHALL BE GIVEN REACTION BLOCKING AS SHOWN
3. SUmCIENT THRUST BLOCK BEARING AREA SHALL BE INSTALLED
TO DISTRIBUTE THE TI-iRUST INTO THE UNDISTIJRBED TRENCH
WALL. WHERE IT IS DETERMINED THAT THE TRENCH WALL WILL NOT
PROVlDE SUITABLE SUPPORT, 3/4- ALL-TI-iREADED RODS WITH
APPURTENANCES SHALL BE USED IN UEU OF BLOCKING.
.',' 4. OF!TION-MEGA~lUGS MAY BE INSTALLED w, 0 RODDING
AUGUSTA-UllUllES ENGINEERING DEPARTMENT
2760 PEACH ORCHARD ROAD
AUGUSTA, GA 30906
(706) 771-2648' FAX (706) 771-2646
DETAIL NO.
1'3.. 1'4
REVISED 3/99
,lit.
~l'L
.~
...;~
'"
5T ANDARD POSlTIONING
FOR SANITARY ~
COfTtRED /RESTRAINED POSITIONING FOR WI. T!R WAINS
I.lECHANICAL JOINT PIPE REQUIRED FOR WATER WAINS
PUl.1.-QN l'::iR VlftAP-AROUNO END SEALS
NO BRIO< SHAU. BE ACCD""TED
D.I.P. CL 50
S1ta CASING
c-.....
tl
tl
tl
tl
tl
~
1. SPACER OPTIONS: 8" WIDE BAND OR 12"
2. APPROVED TYPES ARE CASCADE OR PSI
3. INSTALLATION SHALL BE lAW THE MANUFACfURES STANDARDS
4. CASING PIPE TmCKNESS SHALL BE PER DOT OR RAIL WAY SECIFICA TIONS
--
c:::-""
FOR
TYPICAL ROADWAY ..TACK &: BORE
WATER AND SANITARY SEWER MAINS
AUGUSTA-UllUllES ENGINEERING DEPARTMENT'
2760 PEACH ORCHARD ROAD
AUGUSTA, GA. 30906,
(706) 771-2648: FAX (706) 771-2646.
DETAIL NO.
13'.10
REVISED 3/99
'"
. .
'.: .... --: - .
.' .
~
'MRf SHAU.. BE CCJoINECTEI) TO P1PE
>>ID RAISED TO 'M1liIN 2"- FROI.I
F1NISHElJ GRAOE-EYERY 100' CF PIPE
24-
. 12 CUAGE Cl:Pf'ER 'MRE SHAI.l..
BE ~EC1EO TO PlP€
-,...
1 . Vllire.:ooml be 12 gauge bare copper wire.
2. Vllire shall be wrapped around each corporation a mininmum of two (2) wraps.
"3. Vllire shall b extended outside of each valve box and wrapped around the'valve box
for easy connection of tracing equipment.
BURIED WATER. LOCATIN.G WIRE
'.-
. . -
- .' ~ . ....--.... .'~ . -.' '.
o .'
... "0'
,r" :,. -: '<.:..... .-: '. ~
- ~ :.o.~. :_." .._ .',..
..... ...... 00" ..
- .0.;. !.. .. :..:..... ..
. . .
'\ '0 ."
... - .... ...
. . .
.. --'.. - ..
. . .0-
.' .
. .
. .:.. -: ........
... ..
C'AUT10N, I.
8URIED WATER LINE .
NO'T'E:
AUGUSTA-UTlUl1ES ENGINEERING DEPARTMENT
2760: PEACH ORCHARD ROAD:
AUGUSTA, GA 30906.
(706) 771-2648 FAX (706) 771-2646
DETAIL NO.
1'3'.1"2
REVISED.3/BB
~.
CON~ETE ~~L.E:
H"
DIA + 8" MIN.
~. I.4IN.
15. I.4AX.
Ce+.lP ACTI:D
8ACXF11.L
PL4.JN OR
RElNFORCED
CON~ETE
~I.4IN.
IS" l.lAX.
6"
--'--
PL4.JN OR
RElNFORcrn
CONCRETE
ca..PACTtD GR.A.NUlAR
WA TeRrAL
~
CONCRETE AROi
BEDDING 1.4 A TERIALS AS OEFlNED BY ASCf:
MANUAL OF PRACl1Cf: NO. SO-GRAVITY SEWER
DESIGN AND CONSiRUCTION. AND AS"N D 38.:39.
SEE SECTION 11
r."~
BEDDING
6"
T
ClASS I-NO. 57 STONE
CLAS.SES
SEWER PIPE
FOR
FLEXIBLE
"Gl::NERAL BEDDING AND BAO<FlLlJNG CONCEPTS DEVELOPED FOR FU:XJBL.E: ~. PIPE IolAY ALSO BE APPUED TO RIGID PIPE.
REF"ER TO ANSI AND AS"N SPEOFlCA nONS. NO. 57 STONE IS REOUIRED FOR BEDDING 'M1H PVC PIPE IN COLUIolBIA COUNTY.
BACKFILL
CLASS 2 ffiENOi BAO<Flu.m 'MTI-i COURSE: SAND .k GRAV8...S
'MTI-i IolAX. PARl1Q..E SIZE Of" , '/2., INCL
VARIOUSY GRADED SANDS c!c GRAV8...S
CONl1NING SWALl.. PERCENTAGES OF FlNES.
SOIL NPES GW; GP, S'Ii .!t. SP ARE INO-UDED.
CLASS.3 1RENOi BAO<F1u.m 'MiH FlNE SAND AND CLA~
GlU -.n.s.. INo... FlNE SANOS. SANO-ClA Y MIXTURES.
AND GRAVEl.-Q..AY IolIXlURES. SOIL T'r'PES GM,
GC. SW. AND SC ARE INQ..UOED.
a..ASS ~ ~IS NPE IolATERtAL IS TO BE USED 'MiH APPROVAL
~..
ONLY BY ~E SUPERINTENDENT.
CLASSES
FOR PIPE INSTALLATION
"
AUGUSTA-UllUllES ENGINEERING DEPARTMENT
2760 PEACH- ORCHARD ROAD
AUGUSTA, GA 30906
(706) 771-2648 FAX (706) 771-2646
DETAIL NO.
1'3.19 -
REVISED 3/99
/
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AUGUSTA-,UllUllES ENGINEERING DEPARTMENT
2760 PEACH ORCHARD ROAD .
AUGUSTA, GA 30906
(706) 771-2648" FAX (706) 771-2646
DETAIL NO.
13. 16.
REVISED 3/99
~.
1.0. PIPE
~
10-
12"
A
l' 1/2"
13 1/1:
13 1/1:
B
r
2 1/1:
3'"
..
.4 4
..
.~
..
'.4
~
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11
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NO.3 REBAR O.CLW.r.F.
rc
HelD DOWN S1RAP
1 /~ SiEEI.. RED -
PRnoIED W /,
1/18- BIT. COATING
A
c
C
5 3/~"
II 3/~"
5 3/4-
1: 2 CROUT
. .4.
. 44
~
. ~
'J/4- X 24" CALVAHIZED ANCHOR BOl.iS
I ~7"~1
t
NO. 4 REBAR 12- O.eLF.
(1oIINlW1oIOF 'J)
1:Z-
..
. I
~w~~.~~~
--
'J"-r:1"
WlNlWUW
4
.'
CONCRETE PIER F'OR AERIAL CROSSING
. '.- -----1
AUGUSTA-UTlUl1ES ENGINEERING DEPARTMENT
2.760 PEACH ORCHARD ROAD" ..
AUGUSTA~ GA 30906
(706) 771-2648: FAX (706) 771-2646
DETAIL NO.
t3'J) 9:
REVISED .3/99
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COlolPACiED
BACXfltl.
r Y1NIloIUY
NO. :1 REBAR 4- ON ~11:R
NO-re:
1. ANOiQR COl.L.ARS REQUIRED ON PIPES 8"' D1""'E1ER AND LARGER ON SLCPES r7 ~ OR' GREA"TCR.
2.. TlE-BAO<S PROOucm BY AN APPRO~ IoIANUFACiURER AC:EPTASlE ......'T(RN"~ TO ANOiOR CO-L.ARS.
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ANCHOR DETAIL.
AUGUSTA-UTlUTlES ENGINEERING DEPARTMENT
2760 PEACH. ORCHARD ROAD
. AUGUSTA, GA 30906:
(706) 171-2648' FAX (706) 171-2646
DETAIL NO.
13.. t1
REVISED ;1/99