DDW-2025-004187

1

Wasatch Peaks Ranch │Tank5
April 2025

TECHNICAL MEMORANDUM
To: Brent Arns, P.E.
Utah Department of Environmental Quality
From: Will Bowman, P.E.
Kimley-Horn and Associates, Inc.
111 East Broadway, Suite 600, Salt Lake City, UT 84111
[phone]
[e-mail]
Date: April 16, 2025
Subject: Wasatch Peaks Ranch Tank 5 - Design Memorandum
Water System #15044
INTRODUCTION AND PURPOSE
The purpose of this memorandum is to provide an explanation of the accompanying construction
drawings of the Wasatch Peaks Ranch Plat 3C Tank 5. The construction documents are being submitted
for approval from the Utah Department of Environmental Quality (UDEQ). The goal for the project is to
begin construction summer-2025.
BACKGROUND
The proposed Wasatch Peaks Ranch (WPR) Development is a 15.1 square mile development northeast
of Salt Lake City within Morgan County, Utah. The project will include a private low-density residential
community with private recreational amenities. The project is zoned as a Resort Special District (RSD)
and approved for up to 750 equivalent residential connections (ERC). The residential and commercial
developments and associated infrastructure began to be developed in phases beginning in mid-2020. The
project is being completed by WPR Development Company and the associated infrastructure to support
the development includes water and sewer systems in addition to roadways, dry utilities, and drainage
improvements. As noted, this submittal is a portion of the water system that will be further described
below.
WATER SYSTEM
The proposed water system includes a raw water system and distribution system. The raw water system
is generally composed of groundwater wells, well header piping, transmission main, pump stations and
associated storage tanks, and additional raw water piping. The raw water system delivers raw well water
to the development to serve the distribution system and the snowmaking and golf course irrigation
systems. The distribution system will chlorinate the raw well water at pump station 3 (PF003) and then
deliver potable water throughout the development. The components of the distribution system are a
chlorination system (TP001), pump stations, water storage tanks, distribution piping, and pressure
reducing vaults (PRVs). The various water system components have been and will be constructed in
phases as development continues.

2

Wasatch Peaks Ranch │Tank5
April 2025

The water system Exchange Application was approved in Fall 2020. The Transmission Main Part 1,
Transmission Main Part 2, Transmission Main Part 3, Well Header, Pump Stations 1-3, Tanks 1-4, Plat 1
water distribution, and Tank 4 to Plat 1 water distribution line all received operating permissions in
December 2023. Well A and A2 received operating permissions in January 2024. Plat 2A water
distribution plans received plan approval on May 31, 2022. Plat 3A water distribution plans received plan
approval on November 2, 2023. Plat 3C water distribution plans received plan approval on February 18,
2025. This submittal consists of construction drawings for Tank 5 and associated water lines connecting
to the transmission and distribution water lines in Plat 3C water distribution plans. The remaining
components associated with the water system will be submitted separately to UDEQ.
The entire water distribution system was modeled to meet all UDEQ requirements, and a report was
approved by DDW on March 23, 2021.
Tank 5 is a 300,000-gallon fully buried tank above the phase 3C development at finished floor elevation of
6720.50-feet. The Tank 5 plans also consist of approximately 1550 LF of 10-inch DR-11 HDPE
inlet/transmission line piping and approximately 1580 LF of 12-inch DR-11 HDPE outlet/distribution line
piping that will connect to their respective lines in the previously approved Plat 3C water distribution
plans. There is also a flow meter vault and an interconnection line to bypass Tank 5 to maintain service
downstream in the event the tank is down. Tank 5 is fed from distribution piping originating from Tank 4
(ST004) and a future booster pump station that will be submitted to UDEQ-DDW in the future.
The original master plan for this development did not have any portion of an ERC/lot above the Tank 4
elevation. As development and construction has progressed for WPR, lots were rearranged resulting in
higher elevations than what Tank 4 would be able to supply. WPR decided to design a tank fed by a
constant flow/pressure booster pump station to supply adequate pressure to currently planned ERCs in
the southern end of the development and to add resiliency to the water system. Tank 5 has been sized to
store water for all demands and storge per R309-545 rules. Tank 5 will supply a total of 81 ERCs and fire
flow will be 1,500 gpm at 2 hours per Morgan County fire code. Tank 5 does not add any additional ERCs
as Tank 4 was sized for the total WPR development. However, Tank 5 will store additional water and
supply adequate pressure per R309 rules.
Tank 5 will be a welcomed addition to the WPR water system providing adequate pressure, additional
storage, and resiliency.