HomeMy WebLinkAboutCash-in-lieu of water email1
mcotterman caddiseng.com
From:mcotterman caddiseng.com
Sent:Friday, January 20, 2023 2:24 PM
To:Griffin Nielsen
Subject:Lot 19, Block 4 of Nelson Meadows Subdivision - Cash-in-lieu of water rights calculation
Attachments:C1.0_General Civil and Utility Plan.pdf
Griffin,
Hope you are doing well! We are working on a site plan for the development of Lot 19, Block 4 of Nelson
Meadows Subdivision and need you to confirm/calculate the cash-in-lieu of water rights amount. The project is
a mixed use proposal with ground floor industrial/office and upper floor residential…attached is the current
draft of the site plan.
The water usage is projected as follows:
Estimated Average Daily Water Flow per unit
Residential Flows
1 dwelling unit @ 2.11 persons per dwelling unit
170 gallons/day/capita water flow
(1 dwelling unit)(2.11 )(170 /day) = 358.70 gallons/day Residential
Industrial/Office Flows
2 employees @ 15 gallons/day/employee = 30 gallons/day Industrial/Office
Total Average Daily Water Flow
7 units((358.70 + 30) /unit) = 2,720.90 gallons/day Average (1.89 gpm)
Maximum Day and Peak Hour Demands
Peaking Factors (from City of Bozeman Design Standards, dated July 2017):
-Maximum Day Demand (Peaking Factor = 2.31)
-Maximum Hour Demand (Peaking Factor = 3.00)
Maximum Day Demand = 2,720.90 gpd x 2.31 = 6,285 gpd (4.36 gpm)
Peak Hour Demand = 2,720.90 gpd x 3.00 = 8,163 gpd (5.67 gpm)
In addition, the landscape designers have estimated an irrigation demand of 98,000 gallons of water per year.
If you could run these numbers and let me know if we need to provide additional cash-in-lieu it would be much
appreciated.
Let me know if you have any questions or need anything additional.
Thanks!
Matt Cotterman, P.E., P.L.S.
Caddis Engineering & Land Surveying
226 Timberline Drive
Bozeman, MT 59718
(406)581-4097