Res 2016-137/approving a Water Master Plan to guide the future maintenance and extension of the City’s Water Infrastructure

Home Browse Search

Alan Plummer Associates, Inc. Water Master Plan Update 2016 Table 8-3: 2035 CIP List Pipeline and Pump Station Projects (continued) Diameter CIP # Description Length (LF) TOTAL (in) Upsize lines to 8" PVC in Hughson Heights 41N neighborhood (Hughson Ct., Manor Park Rd., & 8 1300 $155,000 other side streets). Upsize lines to 8" PVC in Oak Heights 41O neighborhood along Franklin St., Larue Dr., 8 5300 $634,000 Indiana St., & Heavenly Hills. Upsize lines to 8" PVC in Downtown on Lindsey 41S St., Pat Garison St., N. Fredericksburg St., & side 8 4100 $490,000 streets/alleys along RR 12. Upsize lines to 8" PVC in East Guadalupe area 41V (along Lee St., McKie St., Mariposa St., & Rincon 8 3600 $370,000 St.) & Wallace Addition (y). 2035 CIP Pipeline Total $5,799,000 In developing the above Costing Model (UCM) was used as a guide for pipelines and pump stations. However, these values were also compared to recent bid tabulations for the City of San Marcos. Recent bids suggested that the UCM values should be adjusted by a factor of 1.48 for all pipelines. New pump stations were estimated using UCM values as a function of required horsepower. Individual pump costs were estimated by verifying costs with vendors. All costs based on the UCM values were then updated from the last UCM publication in March 2012 to July 2015 dollars using Engineering News Record (ENR) construction cost index (CCI) values. For pipelines, costs per linear foot were determined by estimating substrate type in the area (rock or soil) as well as the development density along the route (urban or rural), and then looking up the value for the proposed diameter in the appropriate table in the UCM. The UCM cost was then multiplied by the COSM adjustment factor of 1.48 and then brought to present value using the ENR CCI. For new pump stations, required horsepower (HP) was determined and recent bid tabs were used to estimate costs for stations with HP values from 80 to 200. Stations with HP values outside this range were interpolated from the UCM table for new pump stations. Costs were then brought to present value using the ENR CCI. For tanks, recent bid tabulations and UCM values were compared to estimate costs for new tanks. Costs were then brought to present value using the ENR CCI. Land costs associated with easements were estimated using recent Hays County appraisal values where available. If no appraisal values were available in the area, best engineering judgement was used to estimate land costs. Pavement repair costs were estimated using recent bid tabs. Costs were then brought to present value using the ENR CCI. 8-7 m:\projects\0600\022-01\doc\report\draft\draftmasterplan-v15_hef.docx