HomeMy WebLinkAbout009 L18 Water and Sewer Report
Water and Sewer Memo:
for
NELSON MEADOWS LOT 18
Gallatin County, Montana
June, 2022
Prepared For:
Vista, LLC
Prepared By:
Hyalite Engineers, PLLC
Brett Megaard, PE
Page 1
NELSON MEADOWS LOT 18
ENGINEER’S WATER AND SEWER MEMO
Owner: Vista, LLC
1276 N 15th Ave Suite 103
Bozeman, MT 59715-3289
Introduction
This report provides an estimate of the peak-hour sanitary sewer demand as well as the
average and max day demands of domestic water usage for the proposed site development.
The City of Bozeman Design Standards and Specifications (March 2004) was used as the
primary guideline for this stormwater drainage design.
General Design
The proposed development of the site will contain one commercial building. The building will
have a new 1” copper water service and 4” SDR 26 PVC sewer service. The sewer service
will be connected to the 8” main that runs down Royal Wolf Road. The sewer services will be
installed at a minimum slope of ¼-inch per foot. Cleanouts will be provided at each bend as
well as at the exterior of the building. The water service will also run off of the 8” water main
that runs down Royal Wolf Road. Water services are to be 1” diameter to allow for the fixture
count demand as shown in the included Fixture Count chart. A 2” diameter water service will
also be provided to the building for a fire sprinkler system. This is on top of the fixture count
demand as shown in the included Fixture Count chart.
Sewer Demands
Assuming 15 employees for the commercial use with an average daily flow of 10 gpd per
employee.
(15 employees) X (10 gpd) = 150 gallons per day
Using a peaking factor of 4.43 calculated from equation 10-1 from DEQ Circular 2:
(150 gpd) X 4.43 = 664.5 gpd (0.46 gallons per minute)
Water Demands
Assuming 15 employees for the commercial use with an average daily flow of 10 gpd per
employee.
(15 employees) X (10 gpd) = 150 gallons per day
Using a maximum day to average day ratio of 2.3:1 from City of Bozeman Design Standards:
(150 gpd) X 2.3 = 345 gallons per day (0.24 gallons per minute)
Appendix A – Commercial Water Service
N E L S O N M E A D O W S L O T 1 8
J U N E 2 0 2 2
A P P E N D I X
APPENDIX A
COMMERCIAL WATER SERVICE