2025-08-01_PERMIT FILE - C1981019

Home Browse Search

RULE 2 PERMITS South Taylor – Rule 2, Page 27 Revision Date: 7/21/25 Revision No.: MR-267 Taylor Creek – The water quality in Taylor Creek is principally magnesium-bicarbonate or magnesium- sulfate. The average TDS ranged from 530 mg/L at UTC to 1,210 mg/L at LTC. The mean total recoverable concentration of iron of 0.3-0.6 mg/L is below the USEPA aquatic life standard for the monitoring period, although some individual samples exceeded this standard. Wilson Creek – Bicarbonate and sulfate appear to be the dominant anions that characterize the water quality in Wilson Creek, with calcium, magnesium, and sodium generally occurring in equal proportions. TDS concentrations in Wilson Creek are typically lower than those measured in the other drainages in the general area. TDS values ranged from 560 mg/L in UWC to 920 mg/L in LWC. Mean total recoverable iron concentrations of 0.7 to 5.6 mg/L exceeded the USEPA aquatic life standard in three of the four monitoring locations. Jubb Creek – The water quality in Jubb Creek is also magnesium-bicarbonate or magnesium-sulfate, similar to Taylor Creek. The average TDS ranged from 950 mg/L at WFJC to 1,550 mg/L at CJC. The average total concentrations of iron in the West and East Forks of Jubb Creek exceeded the USEPA aquatic life standard for the monitoring period, however, the total recoverable iron value in the main stem of Jubb Creek was below the standard for the monitoring period. Additional water quality data for these water monitoring locations may be found in the Annual Hydrologic Reports submitted by Colowyo to Division. 2.04.7 (3) Alternative Water Supply Colowyo’s mining operations in the South Taylor area are not expected to cause significant contamination, diminution, or interruption of surface or groundwater resources, based on information provided in Section 2.05.6. The potential diminution that may result during mining is within the water rights held by Colowyo. 2.04.8 Climatological Information Please see Section 2.04.8 in Volume 1. 2.04.9 Soils Resource Information The objective of this section is to meet the requirements of Rule 2.04.9 et seq. by furnishing soils information for the South Taylor permit revision mining areas in sufficient detail to determine the following: • General distribution, properties and present and potential productivity of soils within the mining areas; • Distribution, suitability, and average salvage depths of soils within the disturbed areas associated with the mining areas; and, • Quantity of salvageable suitable soil material for use in the reclamation of the disturbed areas associated with the mining. To meet the requirements of Rule 2.04.9 et seq. both general and detailed soils resource information/data where assembled, collected, and analyzed for each mining area. General soils resource information will be provided first followed by detailed soils resource information for each area. Detailed soils information presented in this document are for the South Taylor mining areas located within the permit revision area