DDW-2025-003519

April 15, 2025
Marjalee Smith
Highlands Water Company Inc
5880 North Highland Drive
Mountain Green, Utah 84050
Subject:Plan Approval, Well Drilling, Mountain Green Well 1 (REPL-1) (WS019);
Highlands Water Company Inc, System #15005, File #16376
Dear MarjaleeSmith:The Division of Drinking Water (the Division) received the plans and specifications for the Well Drilling, Mountain Green Well 1 (REPL-1) from your consultant, Andrew
Flynn, EIT with Aqua Engineering on September 3, 2024. The Division received the Division of Water Rights Replacement Well Application Approval and the Start Card with the from you on
April 10, 2025. It is understood that the ownership of this well was recently transferred from the now dissolved Mountain Green Water Association, UTAH15015 to the Highlands Water Company
Inc, UTAH15005.
We understand that this project consists of the drilling of a replacement well approximately 15 feet from the existing well. It is anticipated that a 12-inch diameter steel casing will
be driven to a depth of 180 feet with knife perforations from 127 feet to 167 feet. A 16” surface casing will be installed from the surface to a depth of 120 feet. A grout seal will
be installed to 110 feet and a 10 foot bentonite plug from 110 feet to 120 feet.The Mountain Green Well 1 (REPL-1) is identified as WS018 in the Division’s database.
We have received the following information forWell Drilling, Mountain Green Well 1(REPL-1):
Plans and specifications for borehole and well drilling.
Division of Water Rights well replacement application approval.
Division of Water Rights drilling start card.
We have completed our review of the plans and specifications, stamped and signed by Darin Hawkes, P.E., and dated August 27, 2024, and found they basically comply with the applicable
portions of Utah’s Administrative Rules for Public Drinking Water Systems. On this basis, the plans for drilling Mountain Green Well 1 (REPL-1) are hereby approved. This approval pertains
to well drilling, development, aquifer testing, and disinfection of Mountain Green Well 1 (REPL-1) only. Please be aware that discharge permits may be required by the Utah Division of
Water Quality for discharges generated during well drilling and aquifer drawdown testing.
The Utah Division of Water Rights (State Engineer’s Office) regulates the drilling of water wells. Before the drilling of a well commences, the well driller must receive a start card
from the State Engineer’s Office. Please be aware that, for public drinking water supply wells, in addition to the Division of Drinking Water’s R309-515 rule, the Division of Water Rights’
rule R655-4 also applies and shall be followed.
After drilling is completed, you are required to submit additional information outlined in R309-515-6(5)(b) and (c) for review andobtain an approval from the Director for equipping this
well and constructing discharge piping and infrastructure necessary for introducing the well water into the distribution system. After obtaining the well equipping approval, you’ll then
be required to obtain an Operating Permit before Mountain Green Well 1 (REPL-1) may be put in service. A checklist outlining the well approval process, including the items required for
well equipping and an Operating Permit, is enclosed for your information.
Please label the well water sample collected for new source chemical analysis with your water system number UTAH15005 and WS018 (for both the facility ID and sample point ID) on all
laboratory forms for each individual source. This will ensure proper identification and entry of the new source chemical analysis results in our database.
Approvals or permits from the local authority or county may be necessary before beginning construction of this project. As the project proceeds, notice of any changes in the approved
design, as well as any change affecting the quantity or quality of the delivered water, must be submitted to the Division. We may also conduct interim and final inspections of this project.
Please notify us when actual construction begins so that these inspections can be scheduled.
This approval must be renewed if construction has not begun or if substantial materials have not been ordered within one year of the date of this letter.
Drinking Water Source Protection Plan Requirement
Based on the information submitted, this well meets the following criteria required under R309-600-6(1)(y) to be classified as a replacement well:
The proposed well location will be within a radius of 150 feet from the Mountain Green Well 1 (Source WS001), which is classified as an existing ground-water source, as defined in R309-600-6(1)(k);
and
The Public Water System provided a copy of the replacement application approved by
the State Engineer and dated April 10, 2025, for Water Right 35-14597 (E6688).A Preliminary Evaluation Report (PER) is not required for this replacement well so long as the replacement
well is drilled within 150 feet of the original well. However, you are required to submit and obtain written approval for a complete Drinking Water Source Protection (DWSP) Plan in accordance
with R309-600-7(1). The DWSP plan must be submitted to the Division within one year of the date of this letter. If you have questions about the source protection requirements, please
contact Melissa Noble, P.G., at [phone] or via email at [e-mail].
If you have any questions regarding this approval, please contact Cameron Draney, P.E., of this office, at [phone], or me at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
CLD/DB/mrn/mdbEnclosure — Well Approval Checklistcc:Scott Braeden, Weber-Morgan Health Department, [e-mail] Hawkes, PE, Aqua Engineering, [e-mail]
Flynn, EIT, Aqua Engineering, [e-mail] Smith, Highlands Water Company Inc, [e-mail] Miller, Mountain Green Water Association, [e-mail]
Draney, PE, Division of Drinking Water, [e-mail] Noble, PG, Division of Drinking Water, [e-mail] 15005 16376 PA Drilling Mountain Green Well 1 (REPL-1)Division
of Drinking WaterChecklist for New Public Drinking Water Wells
(per Utah Administrative Code, Rule R309-515-6)
System Name:System Number:Well Name & Description:1.Approval to Drill the Well
☐Project Notification Form (PNF)
☐Preliminary Evaluation Report (PER) concurrence
☐Well drilling specifications and plans
☐Valid Start Card or authorization to drill letter from the Division of Water Rights2.Approval to Equip the Well
☐PNF (if the well drilling and well equipping are designed by different consultants)

☐Well location data
☐Certification of well seal
☐Well driller’s report (well log)
☐Aquifer drawdown test results (step drawdown test & constant-rate test) for well yield determination
☐Chemical analyses of the well water
☐Plans and specifications for equipping the well
☐Pump information (e.g., pump specifications, pump curve & operating point, motor information, etc.)
☐Well head discharge piping
☐Well house design3.Operating Permit to Introduce the Well Water
☐Documentation of valid water right(s)
☐Recorded land use agreements, or documentation that the requirements for coverage under the City/County source protection ordinance have been met
☐Design engineer’s certification of conformance with plan approval conditions
☐Design engineer’s certification of rule conformance for any deviation from approved plans
☐As-built or record drawings
☐Evidence of O&M manual delivery to system owner
☐Satisfactory bacteriological results as evidence of proper flushing and disinfection