DWQ-2025-004848

June 12, 2025DIVISION OF WATER QUALITYUTAH DEPARTMENT OF ENVIRONMENTAL QUALITYPUBLIC NOTICE OF INTENT TORENEW A UPDES PERMITPURPOSE OF PUBLIC NOTICE
The purpose of this public notice is to declare the Director of the Division of Water Quality’s intention to renew a Utah Pollutant Discharge Elimination System (UPDES) Permit under
the authority of the Utah Water Quality Act, Utah Code § 19-5-106(2)(g). The draft Permit and the Fact Sheet (collectively, the draft Permit documents) are available for review and
comment.PERMIT INFORMATIONPERMITTEE NAME: Castle Valley Special Service DistrictFACILITY NAME:Castle Dale LagoonsMAILING ADDRESS:P.O. Box 877, 20 South 100 East, Castle Dale, Utah 84513TELEPHONE
NUMBER:[phone]FACILITY LOCATION:Just Southeast of Castle Dale City off Hwy 10 in Emery CountyUPDES PERMIT NO.:UT0023663PERMITTED OUTFALLS:001OUTFALL LOCATION:latitude 39°11'30"
and longitude 111°00'30". RECEIVING WATER: Cottonwood Creek, part of San Rafael and Colorado River SystemsBACKGROUND
The Castle Valley Special Service District’s Castle Dale Wastewater Treatment Facility (Castle Dale) serves thecities of Castle Dale and Orangeville with a current total population of
approximately 3,200. The Castle Daledesign capacity is for a population equivalent of 7,020 and an average daily treatment flow of 0.4 to 0.5 milliongallons per day (MGD). The monthly
average design flow is 0.7 MGD. The facility consists of 4 lagoon cells,which are mechanically aerated and with a total area of 49.9 acres. The first cell is 30 acres in size followed
bythree smaller lagoon cells of 6-7 acres each, which are then followed by three sand filters which are alternated asneeded. Chlorination facilities are available, but have not been
used for a number of years.PUBLIC COMMENTSPursuant to Utah Admin. Code R317-8-6(6.6), any interested person may submit written comments on the draft permit documents and may request
a public hearing if no hearing has already been scheduled. A request for a public hearing shall be in writing and shall state the nature of the issues proposed to be raised in the hearing.
All comments will be considered in making the final decision and shall be answered as provided in Utah Admin. Code R317-8-6(6.12). Commenters have an affirmative obligation to raise
all reasonably ascertainable issues and submit all reasonably available arguments and factual grounds supporting their position, including all supporting material. Supporting material
must be included in full and may not be incorporated by reference, unless the material is already part of the administrative record. Public comments are invited any time prior to the
deadline of the close of business on MONTHXX, 202X. Written public comments can be submitted to: Daniel Griffin, UPDES Individual Permits Section, Utah Division of Water Quality, PO
Box 144870, Salt Lake City, Utah 84114-4870 or by email at: [e-mail] considering public comments, the Director of the Division of Water Quality will issuea finalPermit
decision. The draft Permit documents are available for public review under “Public Participation” at www.waterquality.utah.gov/. Additionally, If internet access is not available, a
copy may be obtained by calling Daniel Griffin at [phone].
DWQ-2025-