DDW-2024-010390

J. Paul Wright <[e-mail]>
Hildale Waterline Extension - File #13933 Review Comments
1 message
J. Paul Wright <[e-mail]>Tue, Apr 30, 2024 at 5:10 PM
To: Charles Hammon <[e-mail]>, Jerry Postema <[e-mail]>
Charles and Jerry,
I have reviewed the plans for this project and I have the following review comments:
1) Jerry mentioned to me that this is for an Innovation Center, but will also loop the water lines. Has this been included in
the water system hydraulic model to ensure that the following scenarios are metm especially for the demands of the
Innovation Center and the fire hydrants. If so, the attached hydraulic model certification should be completed and signed.
40 psi peak day demand
30 psi peak instantaneous demand
20 psi for fire flow (1500 gpm from the PNF + peak day demand)
2) On the trench detail , Sheet C-5.1 I could not see what soil type is specified for the pipe zone. It should be 3/4" minus
soil at least.
3) What type of PVC pipe (type and pressure class) is going to be used, you have just called out PVC pipe from what I
can tell.
4) All materials that come into contact with drinking water need to meet the following standard and should be included as
a note in the plans:
(1) ANSI/NSF Standard for Health Effects.
All materials that may come in contact with drinking water, including pipes, gaskets, lubricants and O-Rings, shall
be ANSI-certified as meeting the requirements of ANSI/NSF Standard 61, Drinking Water System Components -
Health Effects. To permit field-verification of this certification, all components shall be appropriately stamped with
the NSF logo
5) I could not see any details or notes specifying water/sewer separation. There should be 10 feet separation (6 feet
under certain conditions) horizontally (edge to edge) and when they cross, there should be a minimum of 18 inches of
vertical separation with the water line above the sewer line.
6) I could not see the disinfection and pressure testing requirements in the plans or notes, the should be as follows:
(10) Disinfecting Water Lines.
All new water mains or appurtenances shall be disinfected in accordance with AWWA Standard C651-05 or a
method approved by the Director. The specifications shall include detailed procedures for the adequate flushing,
disinfection, and microbiological testing of all water mains. On all new and extensive distribution system
construction, evidence of satisfactory disinfection shall be provided to the Division. Samples for coliform
analyses shall be collected after disinfection is complete and the system is refilled with drinking water. A standard
heterotrophic plate count is advisable. The use of water for public drinking water purposes shall not commence
until the bacteriologic tests indicate the water is free from contamination.
(7) Pressure and Leakage Testing.
All types of installed pipe shall be pressure tested and leakage tested in accordance with AWWA Standard C600-
10.
Please respond to this email with your comment resolution and revisions to the plans.
Paul
On Thu, Apr 18, 2024 at 2:00 PM Charles Hammon <[e-mail]> wrote:
4/30/24, 5:10 PM State of Utah Mail - Hildale Waterline Extension - File #13933 Review Comments
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Paul,

We are the design engineers for a waterline extension project in Hildale City. The Project Notification Form and the
waterline construction plans are attached to this email. Please review the attachments and let me know if you need
anything else for the plan review.

I appreciate any feedback you can provide.

Thank you,

Charles Hammon, PE
Excel Design Associates, LLC
1185 West Utah Ave., Ste 102
Hildale, UT 84784
office: 435-619-4586
email: [e-mail]
visit us at: www.exceldesign.us

--
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
4/30/24, 5:10 PM State of Utah Mail - Hildale Waterline Extension - File #13933 Review Comments
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DEQ WEBSITE
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Hyd Model Certification.docx
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4/30/24, 5:10 PM State of Utah Mail - Hildale Waterline Extension - File #13933 Review Comments
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J. Paul Wright <[e-mail]>
Hildale Waterline Extension - File #13933
J. Paul Wright <[e-mail]>Wed, Jul 17, 2024 at 4:10 PM
To: Charles Hammon <[e-mail]>, Riley Vane <[e-mail]>
Cc: Jerry Postema <[e-mail]>, Nathan Fischer <[e-mail]>, Athena Cawley
<[e-mail]>
Charles and Riley,
I know we discussed this on the phone, but I want to ask a couple more questions based on what has been submitted:
1) The hydraulic model memo and report discusses a booster station and proposed modifications to that facility. I have
not seen a design for that facility yet and it will have to be submitted for review and plan approval before it can be
constructed (as a separate project I assume).
2) Is the booster station required for the Innovation Center to meet the minimum pressures? The memo didn't really
address where the Innovation Center was located in the model and what pressures would be achieved for this specific
portion of the area. The only that was addressed is that by adding the Innovation Center, the minimum pressure under
Peak Day Demand would be 40.51 psi with a recommended "upgraded booster station". Again, I have not seen any
submittals for a booster station in this water system.
3) We also require that the Peak Instantaneous flow scenario be modeled, which has a requirement of meeting 30 psi
under that flow scenario and was not discussed at all in the memo.
4) The fire flow scenario shows the minimum fire flows that can be met. I assume that this scenario was modeled by
meeting a minimum pressure of 20 psi and that the Peak Day Demand was added onto the fire flow to meet the DDW
requirement for this scenario?
Let me know if you have any questions.
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.
7/17/24, 4:10 PM State of Utah Mail - Hildale Waterline Extension - File #13933
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J. Paul Wright <[e-mail]>
Hildale Waterline Extension - File #13933
J. Paul Wright <[e-mail]>Wed, Jul 17, 2024 at 9:24 PM
To: Riley Vane <[e-mail]>
Cc: Charles Hammon <[e-mail]>, Jerry Postema <[e-mail]>, Nathan Fischer
<[e-mail]>, Athena Cawley <[e-mail]>
I guess the only question I have based on your responses is if the fire department is okay with only 700 GPM fire Flow at
the 20 PSI. Is that adequate for the Innovation Center and is there any documentation showing that they have approved
that flow rate?
Paul
[Quoted text hidden]
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8/27/24, 3:42 PM State of Utah Mail - Hildale Waterline Extension - File #13933
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