Draft Permit – UIC # 17-218 – Wyoming Department of Transportation Muddy Gap

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Wyoming Department of Environmental Quality

Draft Permit – UIC # 17-218 – Wyoming Department of Transportation Muddy Gap

Draft Permit – UIC # 17-218 - The UIC Program is proposing to issue permit 17-218 for the Wyoming Department of Transportation Muddy Gap employee housing septic system.  The permit proposes to authorize the continued injection of an average of average of 2,106 gallons per day (gpd) average, and 3,510 gpd maximum of primary treated domestic wastewater into the existing leach field.  Wastewater will be injected into the quaternary alluvial aquifer via septic tanks and a leach field.  Review of information on the Wyoming State Engineer’s website revealed that there are no active Wyoming State Engineer’s Office (SEO) well permits located within the area of review for this facility.  The original permit classified the ground water as Class III based upon a surface water sampling site located four (4) miles away in Muddy Creek.  However, the groundwater beneath the Muddy Gap septic system is reclassified as Class II by quality according to Wyoming Water Quality Rules and Regulations Chapter 8.  This classification is made because the groundwater obtained from on-site monitor wells indicates that chloride concentrations have been measured up to 367 mg/L.

The permit applicant is Wyoming Department of Transportation, 900 Bryan Stock Trail, Casper, WY  82601.  This facility is located in the SE¼ SW¼ NE¼of Section 34, Township 28 North, Range 89 West, of the 6th Principal Meridian, Carbon County.  The public is invited to comment on this draft permit until January 16, 2018.

Public Notice


Draft Permit


Fact Sheet