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Home My WebLink AboutPROSPECT AND COLLEGE HOTEL - PDP190014 - SUBMITTAL DOCUMENTS - ROUND 1 - SUPPORTING DOCUMENTATIONPreliminary Water Report for Prospect and College Hotel Fort Collins, CO Prepared For Saunders Commercial Development Company 1705 17th Street, Suite 350 Denver, CO, 80202 9/16/2019 Project No. 18111 September 16, 2019 Project No. 18111 PRELIMINARY WATER REPORT FOR PROSPECT AND COLLEGE HOTEL A PORTION OF LOT 2 OF FOX SHOPPING CENTER SUBDIVISION FORT COLLINS, COLORADO OVERVIEW NARRATIVE The proposed College and Prospect Hotel is located on a Portion of Lot 2 of Fox Shopping Center Subdivision. The site has a net area of approximately 2.0083 acres and is located within the city limits of Fort Collins. The proposed project will consist of a new 6-story hotel building with approximately 83,356 square- feet of gross floor area and supporting utilities consisting of storm sewer, sanitary sewer and waterline improvements. Surface improvements include a new paved parking lot, landscaped areas and concrete sidewalk surrounding the buildings. Part of the City of Fort Collins required improvements will include the extension of utility services from existing sewer, water, and storm drain that are not located within the boundary of Lot 2. The purpose of this report is to verify that the existing off-site 6-inch cast iron water main adjacent to- and west of the subject property is sufficiently sized to deliver adequate fire flow to the proposed building on Lot 2. 1. Existing and Proposed Water System The existing water line to be analyzed is a 6-inch cast iron main installed in 1969. This main connects to a newly installed 8-Inch PVC main in the adjacent property to the south and connects to an 8-inch main across West Prospect Road to the north. There is an existing fire hydrant at the northwest corner of Lot 2 (referred to in this report as “North FH”) and an existing fire hydrant approximately 250 feet to the south of Lot 2 (referred to in this report as “South FH”). P:02015.21_College and Prospect Hotel_Prelim Wat Rpt_18111 2 9/16/19 Fire flow tests were performed by the City for the existing north and south hydrants with the results as follows: North FH: Static pressure: 85 PSI Residual pressure: 80 PSI South FH: Static pressure: 90 PSI Residual pressure: 75 PSI Flow Hydrant: Flowed Nozzle Size: 4.5 IN Flowed at: 38 PSI Flow: 2041 GPM Proposed services to serve the building from the existing 6-inch water main includes a 3-inch domestic service and a 6-inch fire supply line. A new fire hydrant is also proposed off the northwest corner of the proposed building. 2. Criteria and Assumptions The criteria used for the required fire flow was the Table B105.1 of the 2015 IFC. Based on the construction type of IIA, gross floor area to be sprinkled of 83,320 square feet and an occupancy group of R-1, the required fire flow was determined to be 4,250 gpm. Because the building will be sprinkled, a reduction of 75% was used to bring the revised fire flow to 1,063 gpm. 1,500 gpm at 20 psi residual pressure was used, however, since this is the minimum required. An assumed peak demand for the building was assumed at 400 gpm based on meter flows from the AWWA Manual N-22 for a 3-inch meter and service line (maximum flow from the manual is 350 gpm). Final peak demand, however, will need to be verified by the MEP. Based on a 6-inch fire supply line, the maximum demand for the sprinkler system from NFPA 20, Section A-2-9.4 and assuming a fire pump at 15 fps, 1,400 gpm was assumed (maximum flow from the NFPA was 1,322 gpm). In talking with Poudre Fire Authority, this would be very conservative. Final peak demand, however, will need to be verified by the fire suppression designer. 3. Modeling and Results The following is a summary of the scenarios employed: P:02015.21_College and Prospect Hotel_Prelim Wat Rpt_18111 3 9/16/19 Scenario #1: Static Condition The static scenario was modeled first, which established available water pressures for the site with no demands placed on the system. This model demonstrates that all pressure requirements are maintained. Scenario #2: Fire Flow and Peak Demand The second scenario was run with the peak hour demand of the proposed hotel and fire flow. 1,500 GPM was used at the proposed hydrant. An assumed value of 400 GPM for the peak demand of the hotel, and a value of 1,400 GPM was assumed for the fire sprinklers within the building. The modeling information is presented in the Appendix. Based on the analyzed scenarios given the outlined assumptions, the existing 6-inch cast iron water main, from which the proposed domestic service, fire supply line and fire hydrant will be served, is adequately sized to deliver the required peak demand and fire flows for the proposed building on Lot 2. This report will be revised and a final report will be issued once the final demands are more accurately determined. If you have any questions or need additional information please contact me at 970/488-0169 or email me at csonnier@sandersonstewart.com. Thank you. SANDERSON STEWART Charles Sonnier, PE Senior Engineer/Project Manager SCENARIO #1 - STATIC ANALYSIS Midtown Fort Collins Hotel – Fort Collins, CO 18111 Preliminary Water Report Analysis Static Junction Table - Time: 0.00 hours Pressure (psi) Hydraulic Grade (ft) Demand (gpm) Demand Collection Elevation Zone (ft) ID Label <Collection: 0 0 5,209.90 91 32 J1 5,000.00 <None> items> <Collection: 0 0 5,209.90 91 34 J5 5,000.00 <None> items> <Collection: 0 0 5,209.90 91 36 J6 5,000.00 <None> items> <Collection: 0 0 5,209.90 91 38 J7 5,000.00 <None> items> <Collection: 0 0 5,209.90 91 40 J8 5,000.00 <None> items> <Collection: 0 0 5,209.90 91 42 J9 5,000.00 <None> items> <Collection: 0 0 5,209.90 91 59 J4 5,000.00 <None> items> <Collection: 0 0 5,209.90 91 62 J2 5,000.00 <None> items> <Collection: 1 0 5,209.90 91 65 J10 5,000.00 <None> item> <Collection: 1 0 5,209.90 91 66 J12 5,000.00 <None> item> <Collection: 0 0 5,209.90 91 70 J3 5,000.00 <None> items> <Collection: 1 0 5,209.90 91 73 J11 5,000.00 <None> item> 27 Siemon Company Drive Suite 200 W Watertown, CT Page 1 of 8 06795 USA +1-203-755-1666 9/16/2019 WaterCAD CONNECT Edition Update 1 WATER MODEL.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.01.01.04] Preliminary Water Report Analysis Reservoir Table - Time: 0.00 hours Hydraulic Grade (ft) Flow (Out net) (gpm) Elevation Zone (ft) ID Label SOUTH 5,002.00 <None> 0 5,002.00 46 RESERVOIR NORTH 5,003.00 <None> 0 5,003.00 47 RESERVOIR 27 Siemon Company Drive Suite 200 W Watertown, CT Page 2 of 8 06795 USA +1-203-755-1666 9/16/2019 WaterCAD CONNECT Edition Update 1 WATER MODEL.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.01.01.04] Preliminary Water Report Analysis Pump Table - Time: 0.00 hours Pump Head (ft) Flow (Total) (gpm) Hydraulic Grade (Discharge) (ft) Hydraulic Grade (Suction) (ft) Pump Status (Initial) Definition Elevation (ft) ID Label NORTH 5,000.00 North Pump On 5,003.00 5,209.90 0 0.00 31 HYDRANT SOUTH 5,002.00 South Pump On 5,002.00 5,209.90 0 207.90 84 HYDRANT 27 Siemon Company Drive Suite 200 W Watertown, CT Page 3 of 8 06795 USA +1-203-755-1666 9/16/2019 WaterCAD CONNECT Edition Update 1 WATER MODEL.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.01.01.04] Preliminary Water Report Analysis Pipe Table - Time: 0.00 hours Has Check Valve? Hazen-Williams C Diameter Material (in) Length Start Node Stop Node (Scaled) (ft) ID Label NORTH J1 24.0 Cast Iron 130.0 False 33 P2 10 HYDRANT 37 P7 77 J5 J6 8.0 Cast Iron 130.0 False 39 P8 123 J6 J7 8.0 Cast Iron 130.0 False 41 P9 28 J8 J7 8.0 Cast Iron 130.0 False 43 P10 11 J9 J8 8.0 Cast Iron 130.0 False NORTH 24.0 Cast Iron 130.0 False HYDRANT NORTH 48 P1 10 RESERVOIR 63 P3 137 J1 J2 6.0 Cast Iron 130.0 False 67 P15 160 J4 J12 6.0 PVC 150.0 False 68 P13 111 J2 J10 6.0 PVC 150.0 False 69 P6 266 J4 J5 6.0 Cast Iron 130.0 False 71 P4 65 J2 J3 6.0 Cast Iron 130.0 False 72 P5 8 J3 J4 6.0 Cast Iron 130.0 False 74 P14 160 J3 J11 3.0 PVC 150.0 False SOUTH 24.0 Cast Iron 130.0 False HYDRANT SOUTH 85 P12 11 RESERVOIR SOUTH J9 24.0 Cast Iron 130.0 False 86 P11 97 HYDRANT Length (User Defined) (ft) Has User Defined Length? Headloss Gradient (ft/ft) Velocity (ft/s) Flow (gpm) Minor Loss Coefficient (Local) 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 SCENARIO #2 – PEAK DEMAND + FIRE FLOW Midtown Fort Collins Hotel – Fort Collins, CO 18111 Preliminary Water Report Analysis Peak Demand + Fireflow Junction Table - Time: 0.00 hours Pressure (psi) Hydraulic Grade (ft) Demand (gpm) Demand Collection Elevation Zone (ft) ID Label <Collection: 0 0 5,188.03 81 32 J1 5,000.00 <None> items> <Collection: 0 0 5,185.07 80 34 J5 5,000.00 <None> items> <Collection: 0 0 5,187.65 81 36 J6 5,000.00 <None> items> <Collection: 0 0 5,191.74 83 38 J7 5,000.00 <None> items> <Collection: 0 0 5,192.68 83 40 J8 5,000.00 <None> items> <Collection: 0 0 5,193.05 84 42 J9 5,000.00 <None> items> <Collection: 0 0 5,149.20 65 59 J4 5,000.00 <None> items> <Collection: 0 0 5,150.63 65 62 J2 5,000.00 <None> items> <Collection: 1 1,500 5,137.28 59 65 J10 5,000.00 <None> item> <Collection: 1 1,400 5,132.17 57 66 J12 5,000.00 <None> item> <Collection: 0 0 5,149.20 65 70 J3 5,000.00 <None> items> <Collection: 1 500 5,075.44 33 73 J11 5,000.00 <None> item> 27 Siemon Company Drive Suite 200 W Watertown, CT Page 5 of 8 06795 USA +1-203-755-1666 9/16/2019 WaterCAD CONNECT Edition Update 1 WATER MODEL.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.01.01.04] Preliminary Water Report Analysis Peak Demand + Fireflow Reservoir Table - Time: 0.00 hours Hydraulic Grade (ft) Flow (Out net) (gpm) Elevation Zone (ft) ID Label SOUTH 5,002.00 <None> 1,382 5,002.00 46 RESERVOIR NORTH 5,003.00 <None> 2,018 5,003.00 47 RESERVOIR 27 Siemon Company Drive Suite 200 W Watertown, CT Page 6 of 8 06795 USA +1-203-755-1666 9/16/2019 WaterCAD CONNECT Edition Update 1 WATER MODEL.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.01.01.04] Preliminary Water Report Analysis Peak Demand + Fireflow Pump Table - Time: 0.00 hours Pump Head (ft) Flow (Total) (gpm) Hydraulic Grade (Discharge) (ft) Hydraulic Grade (Suction) (ft) Pump Status (Initial) Definition Elevation (ft) ID Label NORTH 5,000.00 North Pump On 5,003.00 5,188.04 2,018 185.04 31 HYDRANT SOUTH 5,002.00 South Pump On 5,002.00 5,193.07 1,382 191.07 84 HYDRANT 27 Siemon Company Drive Suite 200 W Watertown, CT Page 7 of 8 06795 USA +1-203-755-1666 9/16/2019 WaterCAD CONNECT Edition Update 1 WATER MODEL.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.01.01.04] Preliminary Water Report Analysis Peak Demand + Fireflow Pipe Table - Time: 0.00 hours Has Check Valve? Hazen-Williams C Diameter Material (in) Length Start Node Stop Node (Scaled) (ft) ID Label NORTH J1 24.0 Cast Iron 130.0 False 33 P2 10 HYDRANT 37 P7 77 J5 J6 8.0 Cast Iron 130.0 False 39 P8 123 J6 J7 8.0 Cast Iron 130.0 False 41 P9 28 J8 J7 8.0 Cast Iron 130.0 False 43 P10 11 J9 J8 8.0 Cast Iron 130.0 False NORTH 24.0 Cast Iron 130.0 False HYDRANT NORTH 48 P1 10 RESERVOIR 63 P3 137 J1 J2 6.0 Cast Iron 130.0 False 67 P15 160 J4 J12 6.0 PVC 150.0 False 68 P13 111 J2 J10 6.0 PVC 150.0 False 69 P6 266 J4 J5 6.0 Cast Iron 130.0 False 71 P4 65 J2 J3 6.0 Cast Iron 130.0 False 72 P5 8 J3 J4 6.0 Cast Iron 130.0 False 74 P14 160 J3 J11 3.0 PVC 150.0 False SOUTH 24.0 Cast Iron 130.0 False HYDRANT SOUTH 85 P12 11 RESERVOIR SOUTH J9 24.0 Cast Iron 130.0 False 86 P11 97 HYDRANT Length (User Defined) (ft) Has User Defined Length? Headloss Gradient (ft/ft) Velocity (ft/s) Flow (gpm) Minor Loss Coefficient (Local) 0.000 2,018 1.43 0.000 False 0 0.000 -1,382 8.82 0.033 False 0 0.000 -1,382 8.82 0.033 False 0 0.000 1,382 8.82 0.033 False 0 0.000 1,382 8.82 0.033 False 0 0.000 2,018 1.43 0.000 False 0 0.000 2,018 22.90 0.272 False 0 0.000 1,400 15.89 0.106 False 0 0.000 1,500 17.02 0.121 False 0 0.000 -1,382 15.68 0.135 False 0 0.000 518 5.88 0.022 False 0 0.000 18 0.20 0.000 False 0 0.000 500 22.69 0.461 False 0 0.000 1,382 0.98 0.000 False 0 0.000 1,382 0.98 0.000 False 0 27 Siemon Company Drive Suite 200 W Watertown, CT Page 8 of 8 06795 USA +1-203-755-1666 9/16/2019 WaterCAD CONNECT Edition Update 1 WATER MODEL.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.01.01.04] 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 0.000 0 0.00 0.000 False 0 27 Siemon Company Drive Suite 200 W Watertown, CT Page 4 of 8 06795 USA +1-203-755-1666 9/16/2019 WaterCAD CONNECT Edition Update 1 WATER MODEL.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.01.01.04]