HomeMy WebLinkAboutWater Design Report_0914211
Table of Contents
1.1 Project Purpose ............................................................................................................................. 2
1.2 Project Description ........................................................................................................................ 2
1.2.1 Site Location and Land Use ................................................................................................... 2
1.2.2 Existing Facilities ................................................................................................................... 2
1.3 Water Planning Assumptions ........................................................................................................ 3
1.4 Domestic Water Demand .............................................................................................................. 3
1.5 Fire Flow ........................................................................................................................................ 4
2.0 WATER SYSTEM NETWORK ANALYSIS ......................................................................................5
2.1 Methodology and Analysis Parameters ........................................................................................ 5
2.2 Water Network Layout .................................................................................................................. 5
2.3 Modeling Results for Peak Hourly Demand .................................................................................. 7
2.4 Modeling Results for Peak Day Plus Fire Flow .............................................................................. 8
3.0 Conclusion ............................................................................................................................ 10
List of Appendices
· Bozeman Pressure Zone Map
· Fire Flow Request Form
· Fire Hydrant #249 Flow Data
2
INTRODUCTION
1.1 Project Purpose
Smart Foods grocery store is proposing to construct a new grocery store located at the southwest corner
of the North 15th Ave. and West Beall St. intersection on a 1.89-acre lot in Bozeman, Montana. The
purpose of this report is to provide a water network analysis for the existing and proposed infrastructure
servicing the site, and to demonstrate that the proposed water network will provide adequate fire flow
and potable flows for the proposed development.
1.2 Project Description
The proposed Smart Foods grocery store is located within the city’s Pressure Zone 5125 (See Appendix)
1.2.1 Site Location and Land Use
The project site is located within a shopping center that is zoned B-2, “Community Business”, on
land that consists of asphalt paving and landscaping. The business development is bordered to
the north by W. Beall St., to the east by North 15th Ave., to the south by Main Street, and to the
west Harbor Freight Tools. A project location map (see below) has been included for reference.
1.2.2 Existing Facilities
Water servicing the development will flow from the intersection of N. 15th Ave. and W. Beall St.
through the 8-inch main that runs directly north of the proposed Smart Foods and south of W.
Beall St. See Map below for map of existing water infrastructure and project location.
3
The city of Bozeman provided flow data for hydrant #249, which will be used to service the
Smart Foods.
1.3 Water Planning Assumptions
The following design criteria and general assumptions were made as part of the modeling and design
process:
· Node elevations were based on proposed finish ground surface and/or street surface elevations
adjacent to the development.
· Required fire flow was based on the 2018 International Fire Code (IFC).
1.4 Domestic Water Demand
Domestic water demand was calculated based on the acreage of the site. The flow rates were taken
from the City of North Las Vegas for commercial sites and will provide an estimate for the purpose of
this study.
1. = 2.37 ∗ 3.0 !"= 7.11
2. $% &’( = 2.37 ∗ 4.6 !"= 10.9
3. , ,(’- ./0 = 2000
4
1.5 Fire Flow
The fire flow demand required for the Smart Foods site was modeled per Table B105.1 of the 2012 IFC.
The grocery store is a 22,022 square foot building (Type V-B construction). Table B105.1 therefore
requires a fire flow of 4,000 gpm. Additionally, Section B105.2 in Appendix B of the 2012 IFC allows for a
reduction of required fire flow of up to 50 percent, as approved, if the building is provided with an
automatic sprinkler system. The Smart Foods building is fire sprinkled per Section B105.2. Therefore, a
50 percent reduction in required fire flow was modeled for the site, bringing the fire flow to a minimum
2,000 gpm.
The fire flow requirement of 2,000 gpm was split among the building fire sprinkler system (700 gpm) and
fire hydrant #249, located to the north of the Smart Foods building.
5
2.0 WATER SYSTEM NETWORK ANALYSIS
2.1 Methodology and Analysis Parameters
The water network analysis completed for the Smart Foods development incorporates City of Bozeman
criteria for both operational pressure and fire flow requirements. The onsite infrastructure has been
designed to meet the minimum water pressure requirements for each of the following scenarios:
· Maximum Day plus Fire Flow
· Peak Hour
The analysis was performed using EPANET Version 2 modeling software. Pipe velocities were designed
to remain below twenty (20) fps during all scenarios. Friction losses for pipes 12 inches in diameter and
smaller were accounted for utilizing a Hazen-Williams coefficient of 130. A maximum pressure loss of 27
psi was modeled for the 6” pressure reducing valve and the 2” pressure reducing valve that service the
Smart Foods grocery store.
2.2 Water Network Layout
A 6” fire sprinkler line will service the Smart foods grocery store. On this service line, there will be a
pressure reducing valve to keep the pressure below 110 psi per the City of Bozeman standards. Similarly,
a 2” domestic water line will service the Smart Foods grocery store and will be regulated with a pressure
reducing valve to keep the pressure below 110 psi.
See schematic EPA Net Layout below:
6
7
2.3 Modeling Results for Peak Hourly Demand
Peak Hourly Demand – Links
Peak Hourly Demand – Nodes
8
The above snapshots show that the pressure in the system will remain below 110 psi with the use of
pressure reducing valves on each of the service lines to the grocery store. Additionally, the flows will
remain well below the allowable velocity limits.
2.4 Modeling Results for Peak Day Plus Fire Flow
Nodes
Links
9
The above snapshots show that the pressure in the system will remain below 110 psi with the use of
pressure reducing valves on each of the service lines to the grocery store. Additionally, it can be seen
that the velocities will remain below the allowable limits.
10
3.0 Conclusion
The results of onsite water network modeling demonstrate that the proposed infrastructure will provide
adequate fire flow and potable flows for the Smart Foods grocery store. The proposed water system
provides minimum required pressures during all scenarios and pipe flow velocities remain below 20 fps
during the Maximum Day Plus Fire Flow scenario.
CITY OF BOZEMAN
Fire Flow Request Form
PHONE (406) 582-3200 FAX (406) 582-3201
Date August 26, 2021
Location Smart Foods – N 15th Avenue
Pressure Zone South
GIS Hydrant ID# 249
Adjacent Main Size 8-inch DI
Model Scenario Maximum Day Demand, Steady State, Fire Flow
Reference 2017 Water Facility Plan Update1
Hydrant Curves An Excel Spreadsheet with hydrant curves has been provided for the requested
location
Requested Location via the Bozeman Infrastructure Viewer2
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
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0 2000 4000 6000 8000 10000 12000 14000Residual Pressure (psi)Available Flow (gpm)
Hydrant Curve
249
1
Natalee Eaton
From:Scott Mueller <SMueller@BOZEMAN.NET>
Sent:Tuesday, September 07, 2021 8:30 AM
To:Natalee Eaton; Mikaela Schultz
Subject:RE: 21219 Smart Foods Bozeman
Hi Natalee,
Yes please use IFC for fire flow demand. And as you have noted, 2000 gpm is very attainable with our city water system.
Scott Mueller
Deputy Fire Chief-Prevention-Fire Marshal
Bozeman Fire Department
34 N Rouse Ave, Bozeman, MT 59715
Office (406) 582-2353 Mobile (406) 589-6271
“Excellence and Integrity”
From: Natalee Eaton <natalee@awaeng.com>
Sent: Tuesday, September 7, 2021 6:56 AM
To: Mikaela Schultz <mschultz@BOZEMAN.NET>; Scott Mueller <SMueller@BOZEMAN.NET>
Subject: RE: 21219 Smart Foods Bozeman
Importance: High
CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you
recognize the sender and know the content is safe.
I just wanted to check back in with the questions I had below as we are wanting to try and submit our plans back
to the City this week…. Do we just use our standard IFC Code?
Best,
Natalee Eaton
Project Assistant / CAD Technician
2010 N. Redwood Road
Salt Lake City, UT 84116
O: 801.521.8529
D: 801.410.8514
2
From: Mikaela Schultz
Sent: Thursday, September 02, 2021 10:12 AM
To: Scott Mueller <SMueller@BOZEMAN.NET>
Cc: Natalee Eaton <natalee@awaeng.com>
Subject: FW: 21219 Smart Foods Bozeman
Good morning Scott,
Can you answer Natalee’s question below?
City of Bozeman MT
Mikaela Schultz, EI | Engineer I
From: Natalee Eaton <natalee@awaeng.com>
Sent: Wednesday, September 1, 2021 3:20 PM
To: Mikaela Schultz <mschultz@BOZEMAN.NET>; Griffin Nielsen <GNielsen@BOZEMAN.NET>
Subject: RE: 21219 Smart Foods Bozeman
CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you
recognize the sender and know the content is safe.
Mikaela,
When looking into the city design standards we ran into a question regarding the following. It mentions
that “Fire Flow demand as determined by ISO (Insurance Services Office)”, generally we use the IFC code…. I am
unsure what ISO is or what their code would be…
Per IFC code our fire flow demand is 4,000 GPM (which with our building being fire sprinkled our
minimum requirement cuts in half (or giving it a 50% reduction) leaving 2,000 GPM).
Could you give me any further information about what ISO is or if we are correct in using IFC standard
code? The picture below mentions what is referenced above. Please let me know if you have any questions for
me. Thank you for your help it is greatly appreciated.
Best,
Natalee Eaton
Project Assistant / CAD Technician
2010 N. Redwood Road
Salt Lake City, UT 84116
3
O: 801.521.8529
D: 801.410.8514
From: Mikaela Schultz
Sent: Thursday, August 26, 2021 2:44 PM
To: Natalee Eaton <natalee@awaeng.com>; Griffin Nielsen <GNielsen@BOZEMAN.NET>
Cc: Bret Wahlen <bretw@awaeng.com>
Subject: RE: 21219 Smart Foods Bozeman
Hi Natalee,
I can provide the fire hydrant flow and pressure from our model (See attached pdf and spreadsheet)
The HGL is reported at an elevation of 5125 in the area. You can find other helpful water distribution system
information on our infrastructure viewer, I have attached a link to that viewer below:
https://gisweb.bozeman.net/Html5Viewer/?viewer=infrastructure#
Calculate the demands per the City Design Standards Manual as directed in the engineering comments (DSSP
Section V, V.A.4. has some helpful metrics/reporting criteria).
City Design standards and facilities plans can be found at the link below:
https://www.bozeman.net/government/engineering/permits-plans-projects
Let me know if you need anything else,
City of Bozeman MT
Mikaela Schultz, EI | Engineer I
From: Natalee Eaton <natalee@awaeng.com>
Sent: Thursday, August 26, 2021 11:37 AM
To: Mikaela Schultz <mschultz@BOZEMAN.NET>; Griffin Nielsen <GNielsen@BOZEMAN.NET>
Cc: Bret Wahlen <bretw@awaeng.com>
Subject: RE: 21219 Smart Foods Bozeman
CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you
recognize the sender and know the content is safe.
Mikaela,
Thank you for your timely response to our questions we appreciate you looking into those things for us.
I do have another question and wasn’t sure if you or Griffin would better to contact. For the water design report
you mentioned was required (Under Water and Wastewater – Comment 1.) We are needing information for the
following in order to complete our report:
· HGL (Elevations)
· Pressures
· Is there a Standard way for Calculating Demands?
Please let me know ASAP if this is something you can help us with.
Best,
Natalee Eaton
4
Project Assistant / CAD Technician
2010 N. Redwood Road
Salt Lake City, UT 84116
O: 801.521.8529
D: 801.410.8514
From: Mikaela Schultz
Sent: Monday, August 23, 2021 4:26 PM
To: Natalee Eaton <natalee@awaeng.com>
Cc: Susana Montana <smontana@BOZEMAN.NET>; Bret Wahlen <bretw@awaeng.com>; Grayson Smith
<graysons@awaeng.com>
Subject: RE: 21219 Smart Foods Bozeman
Good afternoon Natalee,
Thank you for the meeting breakdown.
Please see the city responses below;
· Please send City Code Form for BMC38.270.030 (C)(D) (Comment - General 1. DSSP Fire Service Line)- At
present there is no (form) per say detailing what is required for concurrent construction per city code,
the code was recently updated and below is the interpretation/deliverables that we have been
requesting at this time:
o BMC 38.270.030.D – The applicant has requested concurrent construction for the public
infrastructure with the project. In certain circumstances, the issuance of a building permit may
be allowed prior to completion of the public infrastructure, provided that the following criteria
are met:
Subsequent to preliminary plat or plan approval, a concurrent construction plan,
addressing all requirements of this section, must be submitted for review and approval
of the community development director in consultation with the city engineer and with
a recommendation from the development review committee.
The following deliverables must be completed prior to concurrent construction
approval:
· The property owner must enter into an improvements agreement to ensure the
installation of required infrastructure and other applicable improvements, to be
secured by any security or securities found in section 38.279.080;
· The developer must provide and maintain hazard and commercial general
liability insurance;
· The developer must recognize, acknowledge and assume the increased risk of
loss because certain public services do not exist at the site;
· The developer must execute a hold harmless and indemnification agreement
indemnifying, defending and holding harmless the city, its employees, agents
and assigns from and against any and all liabilities, loss, claims, causes of action,
judgement and damages resulting from or arising out of the issuance of a
building permit under this section;
· The applicant must provide written approval from the fire department (Scott
Mueller) that adequate fire protection services are available from existing
hydrants, and water supply exists to meet needs during construction.
· Please email Griffin Nielsen on if a Sewer Drainage report will be necessary for this submittal or if it will
be a condition of approval. See Attachments for further information. (Comment – Water and
5
Wastewater 2. DSSP Section (V)(B) Design Report)- I convened with Griffin on 8/23/21. A sewer report
will not be needed as the method used for the sewer calc. provided produces a peak flow that is
generally higher than the DSSP/WW Facilities Plan method. This peak flow was run through the recently
updated WW model and the proposed flows from the subject property are adequately handled by the
existing sewer conduit system per the model report.
· Please review the Stormwater Drainage Report (Grayson Smith will email this to you in a separate
email.) (Comment – Stormwater 1. DSSP Section II/BMC38.410.080/BMC40.04.700(A)(5))- The storm
water report was adequate per my review on 8/20/21.
Please reach out if you have any additional inquiry’s based on this information. I look forward to your
resubmission and moving forward.
Thanks all,
City of Bozeman MT
Mikaela Schultz, EI | Engineer I
From: Natalee Eaton <natalee@awaeng.com>
Sent: Thursday, August 19, 2021 1:31 PM
To: Mikaela Schultz <mschultz@BOZEMAN.NET>
Cc: Susana Montana <smontana@BOZEMAN.NET>; Bret Wahlen <bretw@awaeng.com>
Subject: 21219 Smart Foods Bozeman
CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you
recognize the sender and know the content is safe.
Mikaela,
As per our meeting this afternoon I wanted to send a follow up email with what we are needing from
you.
· Please send City Code Form for BMC38.270.030 (C)(D) (Comment - General 1. DSSP Fire Service Line)
· Please email Griffin Nielsen on if a Sewer Drainage report will be necessary for this submittal or if it will
be a condition of approval. See Attachments for further information. (Comment – Water and
Wastewater 2. DSSP Section (V)(B) Design Report)
· Please review the Stormwater Drainage Report (Grayson Smith will email this to you in a separate
email.) (Comment – Stormwater 1. DSSP Section II/BMC38.410.080/BMC40.04.700(A)(5))
Thank you for attending our meeting and helping to clarify/move our submittal forward. Please let me know
if you need anything else from me.
Best,
Natalee Eaton
Project Assistant / CAD Technician
2010 N. Redwood Road
Salt Lake City, UT 84116
O: 801.521.8529
D: 801.410.8514
6
City of Bozeman emails are subject to the Right to Know provisions of Montana’s Constitution (Art. II,
Sect. 9) and may be considered a “public record” pursuant to Title 2, Chpt. 6, Montana Code Annotated.
As such, this email, its sender and receiver, and the contents may be available for public disclosure and
will be retained pursuant to the City’s record retention policies. Emails that contain confidential
information such as information related to individual privacy may be protected from disclosure under
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CAUTION:This email originated from outside of the organization. Do not click links or open attachments unless you
recognize the sender and know the content is safe.
City of Bozeman emails are subject to the Right to Know provisions of Montana’s Constitution (Art. II, Sect. 9)
and may be considered a “public record” pursuant to Title 2, Chpt. 6, Montana Code Annotated. As such, this
email, its sender and receiver, and the contents may be available for public disclosure and will be retained
pursuant to the City’s record retention policies. Emails that contain confidential information such as information
related to individual privacy may be protected from disclosure under law.
CAUTION:This email originated from outside of the organization. Do not click links or open attachments unless you
recognize the sender and know the content is safe.
City of Bozeman emails are subject to the Right to Know provisions of Montana’s Constitution (Art. II, Sect. 9)
and may be considered a “public record” pursuant to Title 2, Chpt. 6, Montana Code Annotated. As such, this
email, its sender and receiver, and the contents may be available for public disclosure and will be retained
pursuant to the City’s record retention policies. Emails that contain confidential information such as information
related to individual privacy may be protected from disclosure under law.
CAUTION:This email originated from outside of the organization. Do not click links or open attachments unless you
recognize the sender and know the content is safe.
City of Bozeman emails are subject to the Right to Know provisions of Montana’s Constitution (Art. II, Sect. 9) and may
be considered a “public record” pursuant to Title 2, Chpt. 6, Montana Code Annotated. As such, this email, its sender
and receiver, and the contents may be available for public disclosure and will be retained pursuant to the City’s record
retention policies. Emails that contain confidential information such as information related to individual privacy may be
protected from disclosure under law.
CAUTION:This email originated from outside of the organization. Do not click links or open attachments unless you recognize the
sender and know the content is safe.