HomeMy WebLinkAbout014 Deviation Request Letter - Fire Service
K:\Bozeman\TruNorth Contractors\2023823 TruNorth Center\11Regulatory\Site Plan Resubmittal #4\Deviation Request Letter.doc
895 Technology Blvd, Ste 203 Bozeman, MT 59718 (406) 586-0262 Fax (406) 586-5740
895 Technology Boulevard, Suite 203, Bozeman, MT 59718 | 406.586.0262
March 12th, 2024
City of Bozeman Engineering Department
20 East Olive
Bozeman, MT 59715
RE: TruNorth Center
Deviation Request – Fire and Water Service Line Lengths
Dear City of Bozeman Engineering,
WWC Engineering is requesting a deviation for the Site Plan of the TruNorth Center located on a
1.24 acre property Lot 1, Block 1, Section 08, Township 02 S, Range 06 E, located in Northeast
Bozeman, MT.
We are requesting a deviation for the proposed fire and water service lines to be greater than
150’ per Bozeman regulation section 38.410.070.B.2. “The length of service lines from the main
to the structure may not exceed 150 feet in length, unless approved in writing by the city.” The
proposed fire service is 229 feet and the water service 220 feet.
The variance requested will not be detrimental to the public health, safety, general welfare, or be
injurious to adjoining and surrounding properties. Due to the layout of the existing water
infrastructure and the proposed buildings there no alternatives for the fire and water services that
would allow for them to be less than 150 feet.
Attached, please find a copy of the calculations showing there is enough capacity for the
fire/water services to be more than 150’. Please respond at your earliest convenience with any
comments or questions to the address provided below, or feel free to contact me directly at 406-
586-0262 or eringsak@wwcengineering.com
Thank you for your consideration.
Sincerely,
WWC Engineering
_____________________________
Erik Ringsak, PE, CMI
Cc: file
N
Fire Flow Requirements
Water Service Requirements
Based on the Montana Public Works, 02660 - 6th Edition Page 13 of 21 for Water
Distribution. Required flow to produce 2.5 ft/s velocity when flushing pipes.
2024 Uniform Plumbing Code. Page 114 section 610.12.1 Copper Tube Systems.
Maximum velocities in copper and copper alloy tube and fitting systems shall not
exceed 8 feet per second (ft/s) (2.4m/s) in cold water and 5 ft/s (1.5m/s) in hot water.
The deviation request was for a 1.5" copper water service to achieve 2.5ft/s at the
meter due to length being over 150 LF.
Calculations:
Based on City water pressure provided. The 1.5" copper water
service has adequate velocity.