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HomeMy WebLinkAboutRae's Creek Channelization Augusta R,ichmond GA ( . ~ DOCUMENT NAME:yo..es cxeet.. c.-ro(\nd \~-n()n DOCUMENT TYPE: DU.~ YEAR: 00 BOX NUMBER: \ \ FILE NUMBER: \'5\&C\ NUMBER OF PAGES: '1 AUGUSTA-RICHMOND COUNTY, GEORGIA CPB# 323-04-200823334 CAPITAL PROJECT BUDGET RAES CREEK CHANNELIZATION, PHASE IV AND V SOURCE OF FUNDS CPB AMOUNT 2000 G/L CPB AMOUNT RECAPTURE, PHASE III 323-04-1110-6011110-296823333 ($13,325) ($13,325) TOTAL SOURCES: ($13,325) ($13,325) USE OF FUNDS ENGINEERING 323-04-1110-5212115-200823334 $13,325 $13,325 $13,325 $13,325 TOTAL USES: ~~~ F;~~ ~~i~ ~~12~ m>~~ 3~~M cnWg ~~~ 0.. .. Cranston, Robertson & Whitehurst, EC. ENGINEERS PLANNERS SURVEYORS OLD ENGINE COMPANY NO.1 4U KLLIS STREET POST OPFICE BOX U46 AUGUSTA. GEORGIA 30903-2546 J. CRAIG CRANSTON, P.E~ IU..S. THOMAS a ROBERTSON, P L, IU..S. ELDRlDGB It.. WBITEBUBST. JR., P.E. JAMBS B. CRANFORD. JR.. PL DBNNIS J. WELCa P.E. TELEPHONE (708) 722-1588 TEU:COPIER (706) 721-3379 E-MAIL CRWPCIitCRWPC.COM JOHN T. ATrAWAY.!LL.B. WAYNE SWANN,!LL.B. MlCHAXL S. BERGLUND STEVEN M. BRYANT DWIGHT E. l'UNDBlUIURX, II BOBBY M. USRY KEITH It.. LAWRENCE KELVIN G. OGLKSBY July 14, 2000 Mr. Clifford A. Goins Augusta-Richmond County 530 Greene Street Augusta., Georgia 30911 Re: Rae's Creek Study & Bridge at Forest Hills Racquet Club Our File No. 99-194.01 Dear Mr. Goins: We appreciate your consideration of our firm to perform a hydrology and hydraulic analysis of Rae's Creek from Walton Way to Jackson Road and to design the Rae's Creek Bridge at Forest Hills Racquet Club. We are pleased to offer this proposal for the study, design and construction phases of the project. The following presents what we believe to be the scope of work required to complete the necessary elements of the study, design and construction and the engineering fee for completing such work. PROBLEM AND PURPOSE There are currently three known areas of concern on Rae's Creek between Walton Way and Jackson Road. These are the questionable capacity of the Lake Awnond Spillway at Walton Way, the periodic flooding in West Lake Forest Drive and the recurring flooding in Forest Hills Racquet Club. It is believed that the flooding in West Lake Fore~t Drive is a by product of the questionable spillway capacity at Walton Way and the flooding in Forest Hills Racquet Club is believed to be the result of an undersized culvert at Court Side Drive. The purpose of the hydrologylhydraulic study will be to model the section of Rae's Creek. from Walton Way up to Jackson Road in order to determine the effect of the various components . within this section on the three stated problem areas. Furthermore, it is our intent to make recommendations for alleviating the problems for the three areas in question and also to design a . new bridge to replace the culvert crossing at Court Side Drive in Forest Hills Racquet Club. \.. '0 Mr. Clifford A. Goins July 14, 2000 Page 2 SCOPE OF WORK Hydrolo~fHydraulic Analysis: We propose to compile our existing data on this section of Rae's Creek and then -to supplement this data with approximately six additional field run cross-sections and elevations in order to obtain current topographical data on the creek and road crossings within the specified section of Rae's Creek. With this data, we will update the existing TR-20 Model of Rae's Creek in order to determine the design flows to be utilized in the hydraulic analysis of the existing and proposed structures. We do not anticipate having to coordinate with or submit to federal or state regulatory agencies. Once the new design flows have been generated, we will create a base model in the river analysis modeling software, HEC-RAS, for the purpose of determining the existing base flood elevations. After the base model has been developed, we will modify it to reflect various proposed improvements to the channel, the road crossing at Court Side Drive and the spillway at Walton Way. Based on the combinations of possible improvements, we will make recommendations for the construction of specific channel and structure improvements within the limits of the study. Construction Documents The development and implementation of construction docwnents for the new bridge at Court Side Drive will be accomplished in two phases as described below: Brid!!e Desi~n Phase: The design phase will begin with the determination of the necessary design criteria for the bridge. We propose to meet with the City of Augusta officials to determine the minimum design requirements for storm return frequency, bridge geometry and other factors, in consultation with you and the principal property owners, Forest Hill Racquet Club and A TC Development Corporation. Based on the results of the hydrologylhydraulic study and the design criteria determination, we will accomplish the hydraulic analysis necessary to proportion the required size of the bridge or' culvert that will pass the required flows. We will utilize the cross-sections from the field survey and . the HEC-RAS computer model to the extent that it is applicable. We will select a preferred culvert . or bridge, in consultation with you. considering such factors as hydraulic efficiency, constructability, I maintenance of traffic, and utility relocations, and generalized costs. We will prepare a conceptual drawing of the selected plan and will meet with you and the property owners to explain the concept. I Mr. Clifford A. Goins July 14, 2000 Page 3 We recommend that two borings be made at the bridge abutment locations to determine the depth and competency of rock. The cost of this work is not included herein: however, we do propose to coordinate all work required by the geotechnical testing firm that you choose to use. Upon your approval of the conceptual drawing, we will begin the Preliminary Plans for the project. The Preliminary Plans will include the plan. profile, and details required to construct the bridge. The plans will be furnished on 24 inch by 36 inch drawings in AutoCAD Release 14 format. The bridge design will be in accordance with the AASHTO Standard Specifications for Highway Bridges. 1996. These plans, which will be 90 percent complete, will be submitted to the City of Augusta for review and approval. After receiving the Preliminary Plans with comments from the City of Augusta, we will proceed to the Final Construction Plans. The Final Construction Plans will include furnishing the necessary construction docwnents to construct the bridge and incorporation of any review comments by you or the City of Augusta. Brid~e Construction Phase The Construction Phase of the project will include the bidding and negotiation stage and the construction stage of the project. The bidding and negotiation stage will include providing a construction cost estimate, preparing bid docwnents and the project advertisement, responding to contractor questions, attending a pre-bid meeting, attending the bid opening and recommending award to the contractor. Following the award of the project, we will provide the necessary construction phase services to include review of shop drawings, responding to contractor questions, providing periodic site observations and reports and review the contractor's periodic pay estimates for the work completed to date. FEE PROPOSAL We propose to accomplish the following services at the fees indicated. Construction Documents: HydrologylHydraulic Analysis 1. Compile existing and new data 2. Generate new TR-20 Design Flows 3. Develop HEC-RAS base model 4. Develop models of possible improvements 5. Determine recommended operating procedure for gates at Heirs Pond and Lake Aumond 6. Generate report for recommended improvements Su'btotal AnA!Ysis $ 5,075.00 $ 1,280.00 $ 2,320.00 $ 2,640.00 $ 1,050.00 $ 960.00 $ 13,325.00 .. Mr. Clifford A. Goins July 14,2000 Page 4 Brid~e Design Phase 1. 2. 3. 4. Determination of Design Criteria Conceptual Drawing Preliminary Plans Final Construction Plans Subtotal Bridge Design $ 1,680.00 $ 1,960.00 $ 5,220.00 $ 2,220.00 $ 15,060.00 Bridge Construction Phase 1. 2. Bidding and Negotiation' Construction Subtotal Bridge Construction $ $ $ 1,720.00 2,040.00 3,760.00 Total $ 32,145.00 We would expect to submit periodic invoices for these items as they are completed from time to time, and to receive payment within fifteen days thereafter. TIME OF COMPLETION HvdrologylHvdraulic Analvsis: Weare prepared to begin work immediately at your direction and would expect to complete the data compilation and field surveys within 21 days, the hydrology and hydraulic analyses within 21 days and generate report of recommended improvements within 14 days, for a total of 56 days. Construction Documents: Upon completion ofhydrologiclhydraulic analysis, we would expect to complete the design criteria determination for the bridge within 14 days, and the conceptual drawings within 14 day thereafter. Upon approval of the conceptual drawing, we will proceed with the plans and anticipate completing the preliminary plans for your review within 21 days and the final construction plans within 20 days after receiving your preliminary design comments for a total of 69 days. Your authorized signature in the space provided on a copy of this letter returned to our office, or your purchase order, will indicate your acceptance of our proposal and our authorization to proceed with ~i.e project. . . . . . . -' . Mr. Clifford A. Goins July 14, 2000 Page 5 We appreciate your confidence in our firm and the opportunity of making this proposal. We trust that you find it satisfactory. However, should you have any questions about the scope of the services offered. or the fees, please do not hesitate to give us a call. Sincerely, CRANSTON, ROBERTSON & WHITEHURST, P.C. -:Q... .. -~' W~C- Dennis 1. Welch, P .E. DJW :thw enclosure cc: Tom Robertson Jim Cranford ACCEPTED ~ TITLE: M~1.~ tl) /("*'/00 , I BY: DATE: