DDW-2024-006785

March 15, 2024
John Chartier
Division of Environmental Quality
RE: Spring City Culinary Water Project Review
Dear Mr. Chartier,
Thank you for reviewing the Spring City Culinary Water Project and returning comments so quickly.
We have reviewed your comments and questions and provided our responses below. We will also
attach the requested documents to the email chain.
1.Just to clarify, the proposed improvements to the "South Well" as referenced in your
design will be for the Upper South Well (WS006) as identified in the Division of Drinking
Water database? And the "West Well" as referenced in your design will be for the
Artesian Well North (WS007) as identified in the Division of Drinking Water database?
a.Yes, that is correct.
2.Detail B on Sheet D2 shows the creek/river crossing with the required isolation valves
and combination air/vacuum valves. Note 3 in this detail calls out a sample tap and
pressure gauge in the downstream combination air valve assembly, and refers to detail
D on Sheet D2. Detail D on this sheet does not show the sample tap and pressure
gauge. Please clarify detail D to show the sample tap and pressure gauge or add
another note to detail D requiring those items specifically for the creek/river crossing.
a.Detail B on Sheet D2 has been updated to show the sample tap and pressure
gauge for the creek/river crossing.
3.Detail D on Sheet D7:
a.R309-515-6(12)(d) requires that well discharge piping have a Sample Tap, Check
Valve, Pressure Gauge, Flow Meter and Isolation Valve with the sample tap
being first from the wellhead and the isolation valve being last. The plans show
the sample tap after the check valve and there isn't an isolation valve shown at
the end. There is a pressure transducer called out, but it isn't clear if this is tied
directly into SCADA or if there is a display included to verify the pressure on-
site. If there isn't an on-site display for the pressure, a manual pressure gauge is
required.
i.Gate valve has been moved to the end, and sample tap to the beginning.
The pressure transducer will connect directly to the SCADA, so a pressure
gauge has been added.
635 North Main Suite 675,Richfield, Utah 84701
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b.R309-515-6(12)(e) requires the well to have a means for measuring the water
depth. This may be an existing feature that is present, but it is not shown in the
detail. If a means for measuring water depth is not available, it should be
included in the improvements.
i.There is no existing feature. An instrumentation tube has been added to
the detail and depth gauge added to the specifications.
c.A well casing vent should also be considered at this wellhead if one is not
currently available.
i.A well casing vent has been added to the detail.
d.The Check Valve and Gate Valve located in the well discharge piping are
elevated causing a local high point in the discharge piping. Is the high point
required for these two valves or could they be located in-line at the same
elevation as the flow meter? The local high point without an air valve could
cause problems with trapped air.
i.The high point is needed to keep the ultrasonic meter flooded. An air
valve has been added to prevent trapped air at this high point.
4.Detail A on Sheet D10 shows the North Well pump to waste line connecting into the
transmission pipeline in the South Well Valve Box. Please clarify why the pump to waste
line ties directly back into the transmission pipeline and not pumped to waste.
a.Please see sheet W1. The existing North Well pump to waste line drains downhill
to the creek. The South Well pump to waste line will connect to the North Well
pump to waste line. A note has been added to sheet W1 to clarify that the South
Well pump to waste must be laid with a downhill slope away from the valve box
in order to connect to the North Well pump to waste lower than the transmission
lines.
5.Detail D on Sheet D11 calls out a #14 screen on the overflow outlet and that should be a
#4 screen.
a.Detail D on Sheet D11 has been updated to callout a #4 screen.
6.Please provide a formal name for the new tank. The existing tank names are; Lower
Tank, Upper Tank, Upper Zone East Tank.
a.The new tank will be called the “Canyon Tank”.
Please let us know if you have any further questions or need any more information to finalize your
review.
Sincerely,
Jesse Ralphs, P.E.
Project Engineer