DDW-2024-007690

May 21, 2024
Joe Hawkes
Logan City Water System
290 North 100 West
Logan, Utah 84321
Subject:Exception to R309-550-7(1) Minimum Separation Requirements for Logan Station Phase 1; Logan City Water System, System #03010, File #14362
This letter is not Plan Approval for construction.
Dear Joe Hawkes:
On May 10, 2024, the Division of Drinking Water (the Division) received your request for an exception to Rule R309-550-7(1), Separation of Water Mains and Transmission Lines from Sewers
and Other Pollution Sources for Logan Station Phase 1. This rule states specifically that the horizontal distance between pressure water mains and sanitary sewer lines shall be at least
ten feet and that where a main and a sewer line must cross, the water main shall be at least 18 inches above the sewer line.
Background Information
New water mains are being installed in the area of 900 West 200 South in Logan. Existing sewer mains are located at the same elevation as the proposed water main. Constructing the water
main over the top of the existing sewer mains is not an option as minimum cover cannot be maintained.
Exception Request
The basis for your request for an exception to R309-550-7(1) is that given the elevation constraints of the existing sewer mains and minimum cover, the proposed water main will be looped
under the existing sewer mains. You propose to sleeve the water main to the extent of 10 feet on each side of the sewer mains while maintaining a minimum of 1.6 feet of vertical clearance
to meet the intent of the rule.
On this basis, an exception to R309-550-7(1), Separation of Water Mains and Transmission Lines from Sewers and Other Pollution Sources, is hereby granted for Logan Station Phase 1.This
exception may be rescinded at any time if new evidence indicates that the conditions of this exception are no longer being met or a public health risk exists due to this exception.
Please maintain a copy of this letter with your permanent records for future reference.
If you have any questions regarding this exception, 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/mrn/mdbcc:Ben Harker, Bear River Health Department, [e-mail] Mackelprang, P.E., Alliance Consulting Engineers, [e-mail] Hawkes, P.E., Logan City Water
System, [e-mail] Cameron Draney, P.E., Division of Drinking Water, [e-mail] 03010 14362 Sewer Separation Exception