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HomeMy WebLinkAbout17 Water & Sewer Report 12-21-20 WATER & SEWER DESIGN REPORT FOR: COURTYARD HOTEL BY MARRIOTT- BOOTHILL BOZEMAN, MT Prepared By: Madison Engineering 895 Technology Drive, Suite 203 Bozeman, MT 59718 (406) 586-0262 DECEMBER 2020 COURTYARD HOTEL BY MARRIOTT-BOOTHILL WATER & SEWER DESIGN REPORT A. General Information This design report will give an overview of the proposed water main extension and sewer service for the 3.007 acre development of the Courtyard Hotel by Marriott-Boothill located at 2168 Boot Hill Court. The report includes a description of the proposed water system and design parameters. The proposed improvements are anticipated to be constructed in 2021. Once the water main is constructed and approved, it will become a part of the City of Bozeman system. The report also includes a description of the anticipated sewer flow rates for the sewer service. The procedures and parameters outlined in the COB Design Standards and Specifications Guide were used in the design of the water infrastructure for the proposed development. In addition, the following references were used in the preparation of this report: a. COB Design Standards and Specifications Policy, 2004. Addendum #7 b. COB Modifications to Montana Public Works Standard Specifications (MPWSS), Addendum #3. c. DEQ Circular No. 1 d. City of Bozeman Zoning Map e. Uniform Plumbing Code f. City of Bozeman Water Facility Plan Update, July 2017 The developer’s contact information is: Bozeman Courtyard Hotel, LLC 1735 S 19th Ave STE B Bozeman, MT 59718 Water supply and wastewater treatment will be provided by the City of Bozeman. The system owner’s contact info is: City of Bozeman Public Service Department PO BOX 1230 Bozeman, MT 59771 B. Extent of Water & Sewer System The proposed water main extension will be served from the existing City of Bozeman 8” water main in Boot Hill Court. This project will provide a new 8” water main, fire, and domestic services to the proposed building. The sewer service will be provided by a new service on the existing 8” sewer main in Boot Hill Court. The proposed project is displayed on the Utilities exhibit in the Appendix. An overall map of the system from the 2017 Water Facilities Plan and 2014 Wastewater Facilities Plan showing the proposed project in relationship to the entire system is also included in the appendix. C. Alternate Plans The desired alternative for the project is to connect to the existing City water and sewer system. This alternative is preferred by the City, is the most cost efficient, and provides the least amount of environmental impacts. D. Site Conditions The existing site is an empty lot that slopes northward at about 1%. A geotechnical report was conducted for project 2019 by TD&H Engineering. In general, soil conditions consist of a layer of topsoil 0.9 to 1.2 ft thick followed by a layer of silts and clays between 4.0 and 7.2 ft depths, followed by alluvial sandy gravel. Groundwater was encountered on the site and was observed at depths ranging from 4.0 to 7.5’ below the ground surface at the time of the geotechnical investigation. E. Water & Sewer Use Data The City of Bozeman was contacted regarding estimated water use rates for hotels with a restaurant and bar. The City provided metered used data for a similar hotel in Bozeman at an average domestic water use rate of 64 gpd/room. The proposed Courtyard hotel has 117 rooms, therefore equating to an average daily flow rate of 7,488 gpd, or 5.2 gpm. Irrigation water will also be provided by the domestic water service. The annual irrigation amount was provided by the landscape designer, the amount is 229,194 gallons per year applied over a 24 week watering season. Converting this to a use rate yields or 1,364 gpd, 1.0 gpm. To be conservative, an irrigation peaking factor of 4.8 is applied to the use rate, for an average daily irrigation flow of 4.8 gpm. Thus, the design average daily demand is the irrigation flow plus the domestic flow rates, yielding about 10 gpm. In addition to the average daily demand, the water main extension must account for peak periods of daily use. Peaking factors are applied to the demand and account for these peak periods in daily use. The peaking factors used are maximum daily use and peak hour and are obtained from the City of Bozeman Design Standards. The following table summarizes the design demands. DESIGN DEMAND SUMMARY Flow Designation Peaking Factor Flow (gpm) Average Day Demand 1 10 Maximum Day Demand 2.3 23 Peak Hour Demand 3 30 The required fire flow was estimated for based on the City adopted International Fire Code. The proposed structure has a gross square footage of approximately 73,000 sf and will be sprinklered. For this building, with an assumed type IIA construction a fire flow of 4,000 gpm is required. This does not include an allowable reduction due to the sprinkler system. The 64 gpd/room water use rate was also utilized to estimate peak sewer flows for sizing of the sewer service and impact on the existing system. The City requires an infiltration rate of 150 gpd/acre to be included in the sewer flow estimates. At 117 rooms and a peaking factor of 4.2, the estimated peak hour plus infiltration flow rate is 22.4 gpm. A 6” PVC sewer service is proposed, and at a minimum slope of 2% the service has an estimated capacity of 324.8 gpm flowing at 75% full. The existing 8” main in Boot Hill Court was installed at a minimum slope of 0.87%, which has a capacity of 461.3 gpm flowing at 75% full. Sewer flow rate and capacity calculations are included in the appendix. F. Water Flow Requirements and Modeling A hydraulic analysis was performed using WaterCAD in order to determine operating conditions and available fire flow. The model was calibrated to system flow information provided by the City of Bozeman. The system flow data is included in the appendix. The analysis utilized the following criteria:  Hazen-Williams “C” Factor of 130  Minimum operating pressure of 20 psi  Maximum velocity of 15 ft/s in the mains under peak hour conditions  Fire flows evaluated during the maximum day demand event The WaterCAD model shows that the available fire flows range from 4,000 gpm to 6,000 gpm under the maximum day scenario. Therefore, the proposed water main extension has adequate capacity for the maximum day demand plus fire flow and peak hour demand. No operating conditions were outside of the required conditions during the peak hour demand. A WaterCAD exhibit and reports for both the maximum demand plus fire flow and peak hour scenarios are included in the appendix. G. Conclusion Based on this analysis, the proposed 8-inch water main extension for the development of the Courtyard hotel provides adequate service to meet the fire flow plus maximum day demand and the peak hour flows for the development. Additionally, the proposed 6” sewer service and existing 8” sewer main in Boot Hill Court have the capacity to handle the peak sewer flows. The City of Bozeman will need to confirm that adequate supply exists within their system to serve the development. This project will require the approval of the City Engineer and MDEQ. Appendix Utilities Exhibit Overall System Maps Metered Use Data Correspondence Sewer System Calculations City of Bozeman Water System Flow Data WaterCAD Exhibit and Reports Appendix: Utility Exhibit B O O T H I L L C O U R T UP UP FITNESS036 MECH/WH/FIRE026 POOLEQUIPMENT028 POOLCHEMICAL029 POOL/SPA032 MEETINGROOM041 LOBBY019 RECEPTION017 LUGGAGE015 COMP/TELECOM016 ELEVATORLOBBY190 EMPLOYEEBREAKROOM006 LINEN007 LAUNDRY193 WORKROOM012 SALESOFFICE013 MANAGERSOFFICE014 CRATE018 BAR020 FOOD PREP021 MEETINGROOMSTORAGE031 DHU027 POOLVEST.033 CORRIDOR034 ENTRYVESTIBULE001 LOUNGE042 VEST.035 ELECTRICAL025 KING128 KING130KING132KING134KING136 PUBLICSPACE138 QUEEN/QUEENACC. R.I.S.139 QUEEN/QUEENACC. R.I.S.137 QUEEN/QUEEN135 STAIR 2152 STAIR 1150 EMP.RESTROOM005 FIRERISER WATERHEATER MECHANICAL RESTROOM044 PREFUNCTIONAREA039 MEETINGROOM040 WOMENS127 MENS129 GUESTLAUNDRY141 VESTIBULE142 QUEEN/QUEEN133 ICE140 ELEV.EQUIP.143 LINEN144 COURTYARD HOTEL BY MARRIOTT FFE 4723.00 LEGEND 1" = 0 SCALE 30' 601530 EXHIBITMADISON ENGINEERING 895 TECHNOLOGY BLVD, STE 203, BOZEMAN, MT 59718 PHONE (406) 586-0262 COURTYARD BY MARRIOTT UTILITY EXHIBIT Overall System Maps Figure 5-1 – Drainage Basins within the Bozeman Community Plan 5-3 Metered Use Data Correspondence 1 Mark From:Brian Heaston <bheaston@BOZEMAN.NET> Sent:Wednesday, November 4, 2020 11:14 AM To:mark@mad-eng.com Cc:chris@mad-eng.com Subject:RE: CILWR for Courtyard Hotel by Marriott Attachments:Prelim CILWR.xls Mark, We’ve been using the Element Hotel as the comp for new hotels with restaurant/bars. Metered use at the Elements equates to 64 gpd/room. See attached. Anticipated annual domestic water use for Courtyard Hotel is 64*117*365/325851 = 8.4 AF. Irrigation water will be added from the landscape plan once known. The property is in the solvent site, so will use city water for irrigation. The subject property has a CILWR credit form platting. Amount paid at plat was 22.57 gal/yr/sqft, equating to a credit of 22.57*3.007 ac*43560 sqft/ac * 1AF/325851 gal = 9.1 AF. CILWR will be required if the total anticipated annual use is more than 0.25 AF above the credit amount. The amount paid is the difference b/w the anticipated use and the credit if the threshold is exceeded. Brian From: Mark <mark@mad-eng.com> Sent: Monday, November 2, 2020 4:45 PM To: Brian Heaston <bheaston@BOZEMAN.NET> Cc: chris@mad-eng.com Subject: CILWR for Courtyard Hotel by Marriott Hi Brian, I’m writing to request CILWR information for the proposed Courtyard Hotel my Marriott-Boothill at 2168 Boot Hill Court. The hotel consists of 117 guest rooms and a restaurant/bar. Landscaping irrigation will likely be provided via the domestic water service. Would you please provide guidance on the water use rate for CILWR? Please let me know if you need any additional information. Thank you, Mark Juras, PE Madison Engineering, LLC 895 Technology Boulevard, Suite 203 Bozeman, MT 59718 406.586.0262 office 406.868.8213 cell mark@mad-eng.com Sewer System Calculations Courtyard Hotel Site Plan Sewer Flow Estimate 12/21/2020 Sewer Flow Estimate Average Daily Domestic Use per Room 64 gpd Number of Rooms 117 ea Average Daily Flow Rate 7488 gpd Average Daily Flow Rate 5.2 gpm Equivalent Population 92 persons Peaking Factor 4.3 Peak Flow Rate 22.1 gpm Infiltration Rate 150 gpd/acre Lot Gross Acerage 3.007 Acre Infiltration Flow 0.3 gpm Peak plus Infiltration Flow 22.4 gpm Brian Heaston provided metered water use data from the similar Element Hotel in Bozeman, the amount being 64 gpd/room. This metered water use data is utilized to estimate the sewer flows for the project as follows: Sewer Main & Service Capacity Calculations Status Existing - 8" Sewer Location Boot Hill Court Pipe Material 8” SDR 35 PVC Pipe Diameter (in) 8 Minimum Pipe Slope (ft/ft) 0.0087 Coefficient of Roughness (n) 0.013 Depth in Pipe at 75% Full (in) 6 Depth of Flow (ft) 0.5 Pipe Radius (in) 4 Pipe Radius (ft) 0.33 Wetted Perimeter 1.40 Area of Flow (ft2)0.28 Hydraulic Radius 0.20 Velocity (ft/sec)3.66 Flowrate (cfs)1.03 Maximum Pipe Flowrate (gpm)461.3 Status Proposed - 6" Service Location On Site Pipe Material 6” SDR 26 PVC Pipe Diameter (in) 6 Minimum Pipe Slope (ft/ft) 0.02 Coefficient of Roughness (n) 0.013 Depth in Pipe at 75% Full (in) 4.5 Depth of Flow (ft) 0.375 Pipe Radius (in) 3 Pipe Radius (ft) 0.25 Wetted Perimeter 1.05 Area of Flow (ft2)0.16 Hydraulic Radius 0.15 Velocity (ft/sec)4.58 Flowrate (cfs)0.72 Maximum Pipe Flowrate (gpm)324.8 City of Bozeman Water System Flow Data CITY OF BOZEMAN Fire Flow Request Form PHONE (406) 582-3200 FAX (406) 582-3201 Date October 19, 2020 Location Courtyard Hotel by Marriott-Boothill Pressure Zone Northwest GIS Hydrant ID# 1714 Adjacent Main Size 8-inch DI Model Scenario Maximum Day Demand, Steady State, Fire Flow Reference 2017 Water Facility Plan Update 1 Hydrant Curves An Excel Spreadsheet with hydrant curves has been provided for the requested location Requested Location via the Bozeman Infrastructure Viewer 2 If you have questions or need further information feel free to email. Data Disclaimer: Water distribution information is calculated using hydraulic modeling software and is subject to variation. Actual field conditions may vary. This information is provided to the requestor for evaluation purposes only, without warranty of any kind, including, but not limited to any expressed or implied warranty arising by contract, stature, or law. In no event regardless of cause, shall the City be liable for any direct, indirect, special, punitive or consequential damages of any kind whether such damages arise under contract, tort, strict liability or inequity. HOME OF MONTANA STATE UNIVERSITY GATEWAY TO YELLOWSTONE PARK 1 https://www.bozeman.net/government/engineering/permits-plans-projects 2 https://gisweb.bozeman.net/Html5Viewer/?viewer=infrastructure GIS Hydrant # Available Flow (gpm)Residual Pressure (psi)1714 0 105.65 200 104.9 400 103.94 600 102.98 800 101.78 1,000.00 100.35 1,200.00 98.88 1,400.00 97.88 1,600.00 96.73 1,800.00 95.42 2,000.00 93.95 2,200.00 92.33 2,400.00 90.68 2,600.00 88.88 2,800.00 86.95 3,000.00 84.88 3,200.00 82.69 3,400.00 80.39 3,600.00 78.02 3,800.00 75.52 4,000.00 72.9 4,200.00 70.16 4,400.00 67.31 4,600.00 64.34 4,800.00 61.28 5,000.00 58.27 5,200.00 55.11 5,400.00 51.84 5,600.00 48.45 5,800.00 44.95 6,000.00 41.34 6,200.00 37.62 6,400.00 33.79 6,600.00 29.86 6,800.00 25.82 7,000.00 21.73 7,200.00 17.59 7,400.00 13.33 7,600.00 8.98 7,800.00 4.52 7,998.08 0 Hydrant Curve 0 20 40 60 80 100 120 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 Re s i d u a l P r e s s u r e ( p s i ) Available Flow (gpm) Hydrant Curve 1714 Data Disclaimer: Water distribution information is calculated using hydraulic modeling software and is subject to variation. Actual field conditions may vary. This information is provided to the requestor for evaluation purposes only, without warranty of any kind, including, but not limited to any expressed or implied warranty arising by contract, stature, or law. In no event regardless of cause, shall the City be liable for any direct, indirect, special, punitive or consequential damages of any kind whether such damages arise under contract, tort, strict liability or inequity. WaterCad Exhibit and Reports Scenario: maximum day plus fire flow P -3 Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 11/7/2020 WaterCAD CONNECT Edition Update 2 [10.02.00.43] Bentley Systems, Inc. Haestad Methods Solution CenterCourtyard Hotel by Marriott-Boothill.wtg Fire Flow Node FlexTable: Fire Flow Report Junction w/ Minimum Pressure (Zone) Pressure (Calculated Residual) (psi) Fire Flow (Available) (gpm) Fire Flow (Needed) (gpm) Label H-3204,0654,000H-1 J-4203,5234,000H-2 J-3203,4954,000H-3 H-3246,0004,000J-1 H-3205,8654,000J-2 H-3204,5724,000J-3 H-2204,7524,000J-4 Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 11/7/2020 WaterCAD CONNECT Edition Update 2 [10.02.00.43] Bentley Systems, Inc. Haestad Methods Solution CenterCourtyard Hotel by Marriott-Boothill.wtg FlexTable: Reservoir Table Hydraulic Grade (ft) Flow (Out net) (gpm) Elevation (ft) LabelID 4,720.00234,720.00R-130 Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 11/7/2020 WaterCAD CONNECT Edition Update 2 [10.02.00.43] Bentley Systems, Inc. Haestad Methods Solution CenterCourtyard Hotel by Marriott-Boothill.wtg FlexTable: Pump Table Hydraulic Grade (Suction) (ft) Status (Initial)Pump DefinitionElevation (ft) LabelID 4,720.00OnPump Definition - 14,720.00PMP-131 Pump Head (ft) Flow (Total) (gpm) Hydraulic Grade (Discharge) (ft) 242.33234,962.33 Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 11/7/2020 WaterCAD CONNECT Edition Update 2 [10.02.00.43] Bentley Systems, Inc. Haestad Methods Solution CenterCourtyard Hotel by Marriott-Boothill.wtg FlexTable: Junction Table Pressure (psi) Hydraulic Grade (ft) Demand (gpm) Elevation (ft) Label 1054,962.3204,720.00H-1 1044,962.3204,721.00H-2 1044,962.3204,723.00H-3 1054,962.3204,720.00J-1 1054,962.3204,720.00J-2 1044,962.3204,723.00J-3 1044,962.32234,721.00J-4 Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 11/7/2020 WaterCAD CONNECT Edition Update 2 [10.02.00.43] Bentley Systems, Inc. Haestad Methods Solution CenterCourtyard Hotel by Marriott-Boothill.wtg FlexTable: Pipe Table Velocity (ft/s) Flow (gpm) Minor Loss Coefficient (Local) Hazen-Williams C Diameter (in) Stop NodeStart NodeLength (Scaled) (ft) Label 0.15230.000130.08.0PMP-1R-130P-1 0.15230.000130.08.0J-1PMP-143P-2 0.0002.700130.06.0H-1J-111P-3 0.15230.000130.08.0J-2J-134P-4 0.15230.000130.08.0J-4J-2178P-5 0.0002.700130.06.0H-2J-417P-6 0.0000.000130.08.0J-3J-2215P-7 0.0002.700130.06.0H-3J-39P-8 Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 11/7/2020 WaterCAD CONNECT Edition Update 2 [10.02.00.43]Bentley Systems, Inc. Haestad Methods Solution CenterCourtyard Hotel by Marriott-Boothill.wtg FlexTable: Junction Table Pressure (psi) Hydraulic Grade (ft) Demand (gpm) Elevation (ft) Label 1054,962.3204,720.00H-1 1044,962.3104,721.00H-2 1044,962.3204,723.00H-3 1054,962.3204,720.00J-1 1054,962.3204,720.00J-2 1044,962.3204,723.00J-3 1044,962.31304,721.00J-4 Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 11/7/2020 WaterCAD CONNECT Edition Update 2 [10.02.00.43] Bentley Systems, Inc. Haestad Methods Solution CenterCourtyard Hotel by Marriott-Boothill.wtg FlexTable: Pipe Table Velocity (ft/s) Flow (gpm) Minor Loss Coefficient (Local) Hazen-Williams C Diameter (in) Stop NodeStart NodeLength (Scaled) (ft) Label 0.19300.000130.08.0PMP-1R-130P-1 0.19300.000130.08.0J-1PMP-143P-2 0.0002.700130.06.0H-1J-111P-3 0.19300.000130.08.0J-2J-134P-4 0.19300.000130.08.0J-4J-2178P-5 0.0002.700130.06.0H-2J-417P-6 0.0000.000130.08.0J-3J-2215P-7 0.0002.700130.06.0H-3J-39P-8 Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 11/7/2020 WaterCAD CONNECT Edition Update 2 [10.02.00.43]Bentley Systems, Inc. Haestad Methods Solution CenterCourtyard Hotel by Marriott-Boothill.wtg