DDW-2024-010591

September 4, 2024
Zachary Renstrom, Manager
Washington County Water Conservancy District
Washington County WCD – Cottam
533 East Waterworks Drive
St. George, Utah 84770
Subject:Plan Approval, Cottam to Casa 14-inch Diameter Culinary Transmission Line Project;
Washington County WCD – Cottam, System #27071, File #16079
Dear Zachary Renstrom:The Division of Drinking Water (the Division) received the plans and specifications for the Cottam to Casa 14-inch Culinary Transmission Line Project from Russ
Vernon, Alpha Engineering, on August 12, 2024. This project has met the conditions for receiving a plan approval.
Our understanding of the project is the installation of approximately 6,500 feet of 14-inch diameter ductile iron pipe (DIP, 250 psi) in Mills Lane (I-15 frontage road), installing 425
feet of 30-inch diameter steel casing under I-15 using trenchless methods, and tie-ins to an existing 14-inch diameter water line from the Cottam Wells, an 8-inch diameter water line
in Mills Lane, and an existing 12-inch diameter water line in Old Highway 91 north of Leeds. This water line project includes all appurtenant valves and fittings.
We have completed our review of the plans and specifications, stamped, and signed byTodd Brent Gardner, P.E., dated April 2, 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 Cottam to Casa 14-inch Diameter Culinary Transmission Line Project
are hereby approved.
This approval pertains to construction only. An Operating Permit must be obtained from the Director before this water line may be put in 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 J. Paul Wright, P.E., DEQ Southwest District office, at [phone], or me at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
JPW/mrn/mdbEnclosures –Operating Permit Checklistcc:Jeremy Roberts, Southwest Utah Public Health Dept., [e-mail] Gardner, P.E., Alpha Engineering, [e-mail]
Vernon, P.E., Alpha Engineering, [e-mail] Renstrom, Washington County WCD, [e-mail] Bundy, Washington County WCD, [e-mail]. Paul Wright,
P.E., DEQ Southwest District Engineer, [e-mail] 27071 16079 PA
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