2010-12-17_REVISION - C1981019 (153)

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36 Surface water C 4.7.3 JBR study This report is a summary of all jurisdictional waters in the Collom study area and is composed of the following surveys: • spring and seeps, • wetlands and waters of the US, and • riparian habitats. The area covered by the JBR report includes Jubb Creek, Collom and Little Collom Gulches, and the upper reaches of Straight Gulch. The portions of Straight and Morgan Gulches adjacent and downstream of the proposed Collom Mine are not included within the survey area. These areas will likely have to be surveyed prior to permitting. The JBR survey identified jurisdictional waters that might be affected by mine operations in the following areas: • Collom Gulch from the south edge of the proposed mine to approximately 1,000 ft downstream of the junction with Little Collom Gulch. • Little Collom Gulch from the headwaters to approximately 1,000 ft above C before the confluence with Collom Gulch. • East Fork of Jubb Creek from the southern edge of the proposed mine to the confluence with West Jubb Creek. • West Fork of Jubb Creek from the southern edge of the proposed mine to the confluence with East Jubb Creek. • Jubb Creek from the confluence of the East and West Forks of Jubb Creeks to Moffat County Road 51. 4.8 Alluvial valley floors 4.8.1 General Regulations reviewed to determine the status of alluvial valley floors (AVFs) included Regulations of the Colorado Mined Land Reclamation Board for Coal Mining, effective August 30, 1980, and revisions through June 26, 2002. The specific criteria are: • Rule 2, Section 06.8, which lists the criteria the State will use to make their AVF finding as well as permit requirements for operations on areas or adjacent to areas which include an AVF; and • Rule 4, Section 24, which lists the performance standards for operations on or affecting an AVF. 2572 -R2 Colowyo Coal Company Water Management Consultants