DDW-2024-007086

April 9, 2024
David White
Westwater
Navajo Tribal Utility Authority
PO Box 170
Fort Defiance, Arizona 86504
Subject:Plan Approval, Westwater Distribution System (DS001);
Westwater, System #19000, File #13663
Dear David White:The Division of Drinking Water (the Division) received the plans and specifications for the Westwater Distribution System (DS001) from your consultant, Corwin Willmore,
with Brown and Caldwell on February 15, 2024. This project has met the conditions for receiving a plan approval.
Our understanding of the project is the installation of approximately 6,660 linear feet of 8-inch diameter PVC pipeline including approximately 1,100 linear feet of 8-inch diameter HDPE
pipeline installed via directional bore under Westwater Creek. The project also includes 17 connections to existing homes and 12 laterals for future connections.
We have completed our review of the plans and specifications, stamped, and signed byCorwin Willmore, P.E., dated February 13, 2024, and find they basically comply with the applicable
portions of Utah’s Administrative Rules for Public Drinking Water Systems in R309. On this basis, the plans for the Westwater Distribution System are hereby approved.
This approval pertains to construction only. An Operating Permit must be obtained from the Director before the Westwater Distribution System may be put into service. A checklist outlining
the items required for operating permit issuance is enclosed for your information.Approvals or permits from the local authority or the 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 equipment has not been ordered within one year of the date of this letter.
If you have any questions regarding this approval, please contact Russell Seeley, of this office, at [phone], or me at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
RLS/mrn/mdbEnclosures –Operating Permit Checklistcc:Ronnie Nieves, San Juan Public Health, [e-mail] Willmore, Brown and Caldwell, [e-mail] White,
NTUA, [e-mail] Holyan-Higdon, NTUA, [e-mail]
Russell Seeley, P.E., Division of Drinking Water, [e-mail]
Nathan Lunstad, P.E., Division of Drinking Water, [e-mail]
Ryan Barton, Navajo Nation, [e-mail]
Patrick Parsons, Blanding City, [e-mail] 19000 F# 13663 Copy of PA Basic -- A
Utah Division of Drinking Water ― Checklist for Issuing Operating PermitsWater System Name:System Number: Project Description:File Number:
Items 1 through 8 below must be submitted to the Division and found to be acceptable prior to operating permit issuance (unless a water line project meets the requirements of R309-500-7
and is not required to obtain an Operating Permit).
Distribution lines (not including in-line booster pump stations) requiring Plan Approval may be placed into service prior to submitting all of the following items and receipt of Operating
Permit if the water system has received items 1 and 4 below.☐1.Certification of Rule Conformance by a professional engineer (P.E.) that all conditions of Plan Approval were accomplished,
and if applicable, changes made during construction were in conformance with rules R309-500 through 550☐2.As-built or record drawings incorporating all changes to approved plans and
specifications (unless no changes were made to the previously approved plans during construction)☐3.Confirmation that as-built or record drawings have been received by the water system☐4.Satisfactory
bacteriological samples as evidence of proper disinfection and flushing in accordance with the appropriate ANSI/AWWA standards:
☐ANSI/AWWA C651-14 AWWA Standard for Disinfecting Water MainsTwo consecutive sample sets at least 16 hours apart, none positive (e.g., every 1,200 feet, end-of-line, each branch)☐ANSI/AWWA
C652-11 AWWA Standard for Disinfection of Water-Storage FacilitiesOne or more samples, none positive☐ANSI/AWWA C653-13 AWWA Standard for Disinfection of Water Treatment PlantsTwo consecutive
samples per unit, none positive, no less than 30 minutes apart☐ANSI/AWWA C654-13 AWWA Standard for Disinfection of WellsTwo consecutive samples, none positive, no less than 30 minutes
apart☐5.Water quality data, where appropriate [For example, include raw and finished water data that demonstrate satisfactory performance of the treatment facility; sample should be
taken from a storage tank for residual volatile organic compounds after tank interior re-coating; etc.]☐6.If applicable, all other documentation that may have been required during the
plan review process☐7.If applicable, confirmation that the water system owner has received the O&M manual for the new facility☐8.If applicable, location data of new storage tank, treatment
facility, or source