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