DDW-2025-006638

J. Paul Wright <[e-mail]>
Tonaquint Heights Booster Pump - Review Comments - Project File #21228
1 message
J. Paul Wright <[e-mail]>Mon, May 12, 2025 at 10:11 AM
To: [e-mail], Kade Bringhurst <[e-mail]>
Logan,
I have reviewed the plans and water model that you sent, I have the following comments:
1) In reading through the report, it appears you use 800 gallons per day (gpd) for indoor use and 479 gpd for outdoor use
for a total of 1,279 gpd peak day demand per connection. However, in 2020, a system specific peak and average day
demand was determined for St George City. This was a new requirement per the legislature several years ago and is
used in place of the demands in R309-510 for systems that have that established. The system specific peak day demand
per connection for St George is 1,534 gpd and an average demand of 765 gallons per connection. You can find these
numbers at this waterlink site: https://waterlink.utah.gov/reports.html?systemId=1425. These should be used for setting
demands in the hydraulic model for peak day demand (Minimum 40 psi) and for peak day demand plus fire flow
(minimum 20 psi).
2) I just want to clarify what the actual operational flow will be for the booster station. The report states 195 gpm as the
peak flow, but you have 1 - 150 gpm pump, 2 - 500 gpm pumps,and 1 - 1,000 gpm pump. I assume that one of the 500
gpm pumps may be used in a peak flow scenario, along with the 150 gpm pump. Other than that, the 1,000 and 500 gpm
pumps are primarily for fire flow. Do I understand this correctly?
3) Can you verify that the minimum intake pressure for the pumps is 20 psi? This is required by rule in R309-540.
4) The pump station detail on Sheet 95310-B-001 shows two air release valves. The notes say they should be piped to
the floor drain, which appears on the far right side of section B-B. The note instead should indicate that the end of the
downturned air vent has a non-corridible #14 mesh screen on the end and it cannot terminate any closer than 6 inches
from the floor, not to the drain as the note indicates.
5) The pressure gauge indicated on the suction should be capable of measuring both positive and negative pressures.
The discharge side pressure gauge can be a standard gauge.
6) I assume the generator is for backup power at the booster station, since that is required.
Let me know if you have any questions.
Paul
On Thu, Apr 17, 2025 at 8:41 AM <[e-mail]> wrote:
Paul,

Kade Bringhurst with St. George City said that I would need to have you review this booster pump for Tonaquint
Heights.
I’ve attached a link to download the site plan approved by the city and the submittal package from the manufacturer.

Tonaquint Heights Booster Pump

If there is anything else that you need me to do for this review process, please let me know.
5/12/25, 10:20 AM State of Utah Mail - Tonaquint Heights Booster Pump - Review Comments - Project File #21228
https://mail.google.com/mail/u/0/?ik=f3bcb897f8&view=pt&search=all&permthid=thread-a:r7719626927001333018&simpl=msg-a:r-746180887602130…1/2

Thanks

Logan Blake, PE
Civil Engineer

DSG Engineering
113 East 200 North Suite 2
St. George, UT 84770
[phone] x 103 – office
[e-mail]

--
J. Paul Wright, P.E. | District Engineer | Southwest Utah District
435.986.2590 (office) | 435.680.0163 (cell) | 435.986.2595 (fax)
620 S 400 E #400, St. George, UT 84770
DEQ WEBSITE
Emails to and from this email address may be considered public records and thus subject to Utah GRAMA requirements.
5/12/25, 10:20 AM State of Utah Mail - Tonaquint Heights Booster Pump - Review Comments - Project File #21228
https://mail.google.com/mail/u/0/?ik=f3bcb897f8&view=pt&search=all&permthid=thread-a:r7719626927001333018&simpl=msg-a:r-746180887602130…2/2
J. Paul Wright <[e-mail]>
Tonaquint Heights Booster Pump
J. Paul Wright <[e-mail]>Thu, Apr 17, 2025 at 9:48 AM
To: [e-mail], Kade Bringhurst <[e-mail]>
Logan,
I looked at the plans that you sent and it appears to be just the development plans. I could not find a specific design for
the booster pump station, where it will be located, how it ties into the water system, pipe sizes, valving, etc.
You should submit a detailed design of this booster pump that meets R309-540. If this is the same pump station that
Kade talked to me about a few weeks back, with it being a submersible pump in a can, some of the rules may not apply,
but you should ensure that the elements that do apply can be reviewed to ensure sanitary conditions can be maintained.
The Grundfos cut sheets with valve types, etc doesn't really give me anything to review. Here is the rule link:
https://adminrules.utah.gov/public/rule/R309-540/Current%20Rules
It would be really helpful to also have a small write up about pump capacity, size (hp), type, etc. and how this pump will
be used in the system and where the water will flow (is it pressurizing part of the system or is it just transferring water from
one zone to another, which should be described.) Trying to comb through the cut sheets to find this information is difficult.
I also need to see notes in the design about proper disinfection so that when an operating permit is needed, that it can be
properly requested by you (the design engineer).
Also, with your submission, once you have revised everything and are ready to resubmit the complete design package, a
project notification form (PNF) should be submitted along with it. Send it to [e-mail] and copy me as well.
Kade will need to help you fill out some of the information in the PNF .
Paul
[Quoted text hidden]
--
J. Paul Wright, P.E. | District Engineer | Southwest Utah District
435.986.2590 (office) | 435.680.0163 (cell) | 435.986.2595 (fax)
620 S 400 E #400, St. George, UT 84770
DEQ WEBSITE
Emails to and from this email address may be considered public records and thus subject to Utah GRAMA requirements.
2018 PNF.xlsm
29K
5/12/25, 9:41 AM State of Utah Mail - Tonaquint Heights Booster Pump
https://mail.google.com/mail/u/0/?ik=f3bcb897f8&view=pt&search=all&permmsgid=msg-a:r643294255846500898&simpl=msg-a:r643294255846500898 1/1