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HomeMy WebLinkAboutSUPPLEMENTAL AGREEMENT NO 1 CRANSTON ENGINEERING GROUP P C / AUGUSTA-RICHMOND COUNTY DEPARTMENT OF PUBLIC WORKS & ENGINEERING SUPPLEMENT AL AGREEMENT Project No.: N/A SUPPLEMENTAL AGREEMENT NO.1 P.O. 130726 WHEREAS, We, Cranston Engineering Group, P.C., Consultant, entered into a contract with Augusta-Richmond County on December 29, 2007, for engineering design services associated with the Willis Foreman Road Repair/Replacement Project, File Reference No. 07-014 (A), and WHEREAS, certain revisions to the design requested by Augusta-Richmond County are not covered by the scope of the original contract, we desire to submit the following Supplemental Agreement to-wit: Additional Engineering services to design and complete the proposed Willis Foreman Road Bridge over Spirit Creek. It is agreed that as a result of the above described modification the contract amount is increased by $65,070.00 from $16,928.00 to a new total of$81,998.00. Any modifications to submittal dates shall be as identified in the attached proposal. This agreement in no way modifies or changes the original contract of which it becomes a part, except as specifically stated herein. NOW, THEREFORE, We, Cranston Engineering Group, P.c., Consultant, hereby agree to said SupplemeI1tal Agreement consisting of the above mentioned items and prices, and agree that this Supplemental Agreement is hereby made a part of the original contract to be performed under the specifications thereof, and that the original contract is in full force and effect, except insofar as it might be modified by this Supplemental Agreement. L/ar: This.:tth day of February. 2007 RECOMMEND FOR APPROVAL: CITY OF AUGUSTA-RICHMOND COUNTY Ale7or:- Deke Copenhaver, Mayor ., !Z.I (0/ Approved: Date ~ ~6~ . C~Fee./.J2..... ,IfI...r- /Tf . ~ ./. r ( pproved: Date cI -1-~~ .' [ATTACHED CORPORATE SEAL] J . C .~ / :- " ,--<!'" (SA02 - For changes greater than $20,000) January 2001 .. ^ Cranston Engineering Group, P.C. ~ENGINEERS-PLANNERS-SURVEYORS 452 ELLIS STREET, AUGUSTA, GEORGIA 30901 POST OFFICE BOX 2546, AUGUSTA, GEORGIA 30903 TELEPHONE 706-722-1588 FACSIMILE 7~722-8379 mail@cranstonengineering.com THOMAS H. ROBERTSON, PE, AICP, RUl ELDRIDGE A. WHITEHURST, JR., PE JAMES B. CRANFORD, JR., PE DENNIS J. WELCH, PE J. CRAIG CRANSTON, PE, RLS <RETIRED} February 5,2007 Mr. Abie Ladson, P .E. Augusta Public Works and Engineering Department 1815 Marvin Griffin Road Augusta, GA 30906 Re: Willis Foreman Road Bridge Replacement Project Proposal for Engineering Seryices CRW File No.: 2006-508 Dear Mr. Ladson: Cranston Engineering Group, P .C., is pleased to offer this proposal for civil and structural engineering and surveying services for the Willis Foreman Bridge Replacement Project located in Augusta, Georgia. This proposal presents the scope of services to be offered by our design team and the engineering fees to complete the proposed work. Scope of Services Cranston Engineering Group recently completed a bridge assessment for the Willis Foreman Road Bridge and found that the bridge should be replaced. A copy of our assessment is included with this proposal. The current bridge has been posted by the Georgia Department of Transportation for a maximum of3 ton axles. Trucks with axle loads greater than 3 tons cannot travel over the bridge. Based on the age of the bridge and inability to meet an AASHTO Functional Classification, our firm recommended that the bridge be temporarily repaired in order for the roadway to be reopened for passenger vehicles with axle loads less than 3 tons. The repairs were recommended for the bridge to remain open during construction of a new bridge. We propose to prepare the construction documents required to replace the bridge to allow HS-20 vehicles (18 wheel trucks) to travel over the bridge. We propose to prepare a survey ofthe site which will include the roadway and ground topography and property lines on both east and west sides of the bridge for a minimum length of 1200 " 2 linear feet per side. The survey will be used to create a database for the design of the bridge and tapered roadway. The existing roadway will be staged to remain open during the construction of the new bridge. Furthermore, we propose to prepare R/W Plans, Bridge Plans, and Roadway Plans required to replace the current bridge structure. Currently, we would propose to replace the 24 foot wide bridge with a bridge structure consisting of two 12 foot driving lanes with 10 foot shoulders on each side for a total bridge width of 44 feet. This width meets the Georgia Department of Transportation functional classification for a 2 lane rural section with an ADT volume exceeding 4000 vehicles per day. We have assumed that this bridge will not be designed in accordance with the Georgia Department of Transportation Plan Development Process. However, the bridge and roadway will conform to AASHTO standards. This proposal also includes the inclusion of a geotechnical evaluation of the site. The geotechnical work will include a soil survey for the determination of a soil support value to be used for roadway design and a bridge foundation investigation that will determine the pile capacity for the proposed bridge substructure. Following the completion of the design process, we will prepare an Engineer's Estimate of Probable Costs for use in determining the final project budget. We will also prepare bid documents for the project which will include the project specifications and standard city bidding documents to be used to bid and let the project. This proposal also includes construction phase services which would inClude attending apreconstruction meeting with the City of Augusta and the contractor, performing up to ten (10) periodic site observations to assure that the contractor is adhering to the contract documents, attending up to four (4) site meetings with the contractor, providing plan interpretation of the drawings, and reviewing bridge shop drawings and submittals. This proposal does not include environmental or electrical services. However, these services can be provided as requested by the City of Augusta. Engineering Fees and Time of Completion We propose to complete the work in accordance with the following Lump Sum Fees: Surveying: $ 8,650.00 Geotechnical Investigation - Roadway and Bridge $6,820.00 R/W Plats $ 7,040,00 Bridge Plans: $ 20,480.00 Roadway Plans: $ 11,520.00 Cost Estimate: $ 800.00 , ~ 3 Bid Document Preparation: $ 1,280.00 Construction Phase Services $ 8,480.00 Grand Total $ 65,070.00 We are prepared to begin work immediately and proceed with the work upon receipt of an executed agreement returned to our office. We propose to complete the work within ninety (90) days following receipt of your notice to proceed. We appreciate the opportunity to be of service to Augusta Engineering and Public Works Department. Please contact us at your convenience should you have any questions regarding any aspect of this proposal. Sincerely, CRANSTON ENGINEERING GROUP, P.C.