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Home My WebLink AboutVII (D) Reclaimed Water Retrofit Design Fees to Hartman & Associates, Inc. in the amount of $7,500 for Waterside and Silver Glen Subdivision Agenda 7-18-2000 Item VII 11"CENTER OF GOOD LIVING-PRIDE OF WEST ORANGE"" MAYOR• oMMIss'ONER Ocoee S_SCO'IT VANDERGRIFT 6" '• c 'o CITY OF OCOEE ONrRs �` _ DANNY IIOWIiLI, p, 160 N. LAKGSIIORL DRIVE SCOTr ANDERSON OCOEE,FLORIDA 34761-2258 RUSTY JOHNSON C`y �V (407)656-2322 NANCY 1.PARKER ��OF OOOO�Ni CI[Y MANAGER WAS SIIAPIRO MEMORANDUM DATE: June 27, 2000 TO: The Honorable Mayor and Board of City Commissioners FROM: James W. Shira, P.E., City Engineer/Utilities Director q� SUBJECT: Reclaimed Water Retrofit Design Fees /f Waterside and Silver Glen Subdivisions On May 4, 1999, the City Commission awarded a design contract to Hartman & Associates, Inc. for the design of a reclaimed water distribution system in the referenced subdivisions. This was the first project of this type undertaken by Ocoee, and we went through several more iterations of computer modeling than we had expected. This extra work was required to allow us to provide the most efficient system in terms of line size and location, so that we could construct a system that was the most cost effective. Hartman spent many hours over their original estimate helping us fine-tune this system. The lessons learned on this project will apply to future retrofit projects, and will help keep design and construction costs of those future projects to a minimum. Please be assured that we have taken the City Commission's recent clear direction to heart, and are no longer authorizing any of our design or construction contractors to perform any more work than was originally authorized without specific additional authorization by the City Commission. However, this work began in May of 1999, before the City Commission's recent clear direction that no additional work be authorized without prior approval of the Commission. Hartman acted in good faith to try to finish this project in a timely manner, and should be compensated for their work Hartman has submitted a request for additional compensation in the amount of$7,500, and I recommend that the City Commission authorize payment of this additional compensation to Hartman for services rendered. As always you are welcome to come into my office or call me if you have any questions on this or any other topic. POWF 627 Prated Ocoee's Water Resumes iw. HARTMAN & ASSOCIATES, INC. engineers, h}drogeologists,surveyors& management consultants NIAR29 March 24, 2000 "" HAI 498-037.05 Mr. James W. Shim, P.G. City Engineer/Utilities Director City of Ocoee 150 N. Lakeshore Drive Ocoee. Florida 34761-2258 Subject: City of Ocoee Waterside and Silver Glen Reclaimed Water System Dear Mr. Shim: As you are aware, I lartnfan & Associates, Inc. (HAI) was directed by the City to conduct a hydraulic analysis for both the Waterside and Silver Glen reclaimed water distribution systems. The analysis included several different scenarios with variations in pipe sizing, irrigation demand, irrigation application times, future connections, allowable pressures, and service metering options. Also. HAI attended several meetings with the City to discuss each round of analysis iterations, which were in addition to the meetings included in the original Scope of Work. In addition to the hydraulic analysis, HAI prepared a set of standard reclaimed water details for the City and provided those details in digital format. As agreed, this work was not in our original Scope of Services for the above-referenced project. A summary of the additional man-hours incurred by these tasks are depicted in the attached table to this letter. Also provided is a detailed breakdown of each Cybernet alternative model run. The total cost for setting up both models and running the various scenarios for the hydraulic analysis. providing the reclaimed water system details, and attending the additional meetings is $9,396.00, as detailed in the attached table. HAI is requesting to be paid a total of$7,500.00 for these additional services. HAI considers the City of Ocoee to he an important client and we wish to continue our good working relationship. For this reason, we have decided to reduce the total cost or the additional work to the requested amount. We have enjoyed working with you and your staff throughout the design of this Project, and look forward to the successful construction of the reclaimed water system in both of these subdivisions as well as others throughout the City. 201 P:UI PIT',NM 1 • Si 1[ IIIUII • ORIAVU(I,IL. 2SIII 11a 11110NE DIu 1 Hi9 i95s . I•VA I1c 1 839 CYO • ,v,c,,.co,nAlthnl tout t1Hl.AAUU IPltl AI19:Re 19%NI9IIPA JVC K'( \AIIll' I)4<TIA Mr. James W. Shira, P.E. March 24,2000 Page 2 If you have any questions or comments, please do not hesitate to call me. Vey truly yours, Hartman & Associates, Inc. J.7.:-kRichard Voorhees Senior Project Manager Attachments NIJ HIska/sma/99-037.09/co resp/ shira2 mjh.doc cc: David A.Wheeler, P.G., Assistant City Engineer/Utilities Director Harold E. Schmidt, Jr., P.E., HAT Michael J. Hudkins, P.E..,HAI Alexis S. Kinton, E.I., HAI PROJECT: City of Ocoee Waterside and Silver Glen Reclaimed Water Distribution System JOB #: 98-037.05 PHASE: 6 DATE: December 7, 1999 Week Description ASK MJH JRV Hours Hours Hours 8/11-8/18/99 Preparing details and starting hydraulic analysis model 15 2 1 8/18-8/25/99 Preparing details and running model at different gpm 7 2 1 8/25-9/1/99 Running model at different gpm and % of neighborhood usage 5 1 1 9/1-9/8/99 Running model at various pipe sizes with future connections at Silver Glen and Waterside 11.5 2 1 9/8-9/22/99 Running model at various pipe sizes with no future connections however with and'without meter box 12 2 1 9/22-10/6/99 Running new model including comments between Rich and the City. Changes included maintaining pressure and keeping pipe sizes 8- inches or less. Developing standard reclaimed water details for the City. 15 6 8 10/6-10/27/99 Meetings(2)with City on hydraulic model, discussing reclaimed water details, and determining reuse application rates. Running model with City comments incorporated. Comments included additional future flows in both divisions, pipe size changes, and increase pressure in selected areas. Prepared letter summarizing changes and meeting 15 12 8 TOTAL HOURS 80.5 27 11.5 HOURLY RATE $60/hr. $75/hr. $121/hr. SUB-TOTAL $4830.00 $2025.00 $2541.00 TOTAL $9396.00 MJHlckaicorresp/rybemettime.doc HAI#98-037.05 022100 PROJECT: City of Ocoee • Waterside and Silver Glen Reclaimed JOB #: 98-037.05 • PHASE: 6 • DATE: December 8. 1999 • SUMMARY OF EACH CYBLRNET MODEL SCENARIOS RUN I. i/environ/mjh/ocoee/silverglen20 20 gpm Model 1 — 100% 2. i/environ/mjh/ocoee/silverglen20 20 gpm Model 2 — 50% 3. i/environ/mjh/ocoee/silverglen20 20 gpm Model 3—75% 4. i/environ/mjh/ocoec/waterside20 20 gpm Model 1 — 100% li 5. i/environ/mjh/ocoee/e-aterside20 20 gpm Model 2—50% 6. i/environ/mjldocoee/waterside20 20 gpm • Model 3 —75% 7. i/environ/mj h/ocoee/silverglen15 15 represent - 15 gpm • Model 1 — 100% 8. i/environ/mjh/ocoee/silverglen15 15 represent - 15 gpm Model 2 — 50% 9. i/environ/mjh/ocoee/silverglen l5 15 represent - 15 gpm Model 3 —75% ID. i/environ/mjh/oeoee/ valerside l5 15 represent - 15 gpm Model 1 — 100% I\EN VIItONV ASK V98-03705ANI IMHOI RI IN S due PROJECT: City of Ocoee Waterside and Silver Glen Reclaimed JOB #: 98-037.05 • PHASE: 6 DATE: December 8, 1999 11. i/environ/mjh/ocoee/waterside15 15 represent - 15 gpm Model 2—50% 12_ i/environ/ntjh/ocoee/watersidel5 15 represent - IS gpm Model 3 —75% After Meeting with City of Ocoee it was decided that 20 gpm utilizing 50%of each neighborhood alternating reuse service would be modeled and changed. 13. i/environ/mjh/ocoee/silverglen20a The following changes were made: Adding on future connections to Silver Glen at .I-41 with a flow of 1200 gpm al 49.54 psi. See velocity chart. • 14. i/environ/mjh/ocoee/waterside20a Adding on future connections to Waterside at J-25 with a flow of 760 gpm 54.06 psi. Sec velocity chart. 15. i/environ/mjh/ocoee/silverglen20Ba & 20Bh Only serving existing system as in No. 1 Model 2 with NO future. Ba is with a meter requiring the minimum pressure at any junction node to be 45 psi. 16. i/environ/mjh/ocoee/silverglen20Ba & 201lb Only serving existing system as in No. I Model 2 with NO future. Bb is with a meter requiring the minimum pressure at any junction node to be 40 psi. 17. i/environ/mjh/ocoee/waterside20Ba&20Bb Only serving existing system as in No. I Model 2 with NO future. Fla is with a meter requiring the minimum pressure at any junction node to be 45 psi. 18. i/environ/mjh/ocoee/waterside20Ba&20Bb Only serving existing system as in No. I Model 2 with NO future. Bb is with a meter requiring the minimum pressure at any junction node to be 40 psi. ISFNV[l(UNVASSAl -U37.05ANaUA1HOIRI.NS.doe 1 1 1 I. PROJECT: City of Ocoee Waterside and Silver Glen Reclaimed JOB #: 98-037.05 PHASE: 6 DATE: December 8, 1999 19. i/environhnjh/ocoee/silverglen20C Using recommended 8" pipe throughout neighborhoods on designated areas determined by MJH and JRV and fluctuate flow to maintain a pressure at future nodes at 55 psi. Determine maximum flow. Ca,b,c etc. is varying pipes to achieve above- • 20. i/environ/mih/ocoee/waterside2OC Using recommended 8" pipe throughout neighborhoods on designated areas determined by MJH and .IR V and fluctuate flow to maintain a pressure at future nodes at 55 psi. Determine maximum flow. Cabe etc. is varying pipes to achieve above. 21. i/environ/mjtt/ocoeelsilverglen20e Run I for the Silver Glen Subdivision, is the original model revised to illustrate a 12-inch pipeline from Clarke Road to SR 438 allowing R-2 to maintain an entrance pressure of 56 psi. Initially I-IAI had assumed that there would be a 16- inch main from the entrance of Silver Glen to SR 438 which resulted in a pressure of 58 psi at R-2. This change in entrance pressure has decreased the allowable future flow of 50 gpm at .1-41 to 0 gpm to maintain acceptable pressures within the rest of the subdivision. 22. i/environ/mjh/ocoee/silverglen20d Run 2 for the Silver Glen Subdivision illustrates the revisions requested by the City. After the pipe size changes were made the allowable future flow from J-41 totaled 50 gpm. 23. i/environ/mjh/ocoee/silverglen2Of Run 3 for the Silver Glen Subdivision illustrates the changes requested by the City plus an excess demand on J-38 to supplement any future flow to the surrounding area that may be developed. The allowable future flow at .1-38 is estimated to be 110 gpm. 24. i/environ/nj h/ocoee/waterside20d Run 4 for the Waterside Subdivision illustrates the requested change by the City in P-1 from a IO-inch pipe to a 12-inch pipe increasing future flow at J-25 from 700 gpm to 750 gpm which satisfied the maximum required at that point. I91:N VIItUMASKV98-037 OAN UMBORtU N S Aoc