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Sediment Control Measures ., 1 6owf I ~. caw a a(~,,; l Lois ow~~ ~ ~ Plans for the Deserado Mine have adequately provided for erosion prevention and control. The surface water control system in the D-Portal and Refuse Disposal Areas and along the coal transport and storage svstem have been designed to minimize sediment contribution to natural drainageways on and off the permit area. Secondary erosion control measures are proposed to reduce the sediment lbad carried by the primary control systenx These include revegetation and mulch- ing, anchored jute netting and contour furrowing on slopes greater than or equal to 3h:ly; graveled surfacing, stabilization of rills and gullies as they develop, and the installation of loose rock check dams in gullies and channels to trap sediment. Diversions have been implemented to reduce erosion by routing run-off away from vulnerable areas. The monitoring program proposed by the applicant will alert the appropriate reviewing agency to the need for further sediment control measures. The applicant is in compliance. Sedimentation Ponds General Requirements Sedimentation ponds in the Refuse Disposal Area will be constructed prior to the onset of any grading activites. The D-Portal Area sedimentation pond can- not be constructed prior to grading activites since it will be located on top of the Scullion Gulch diversion and run-off cannot be diverted into the pond until most of the diversion pipe is in place. Instead, three loose rock check dams will be installed in the Scullion Gulch channel downstream of the D-Portal ~~~ Area during the first summer of construction in order to trap excess sediment (~/ ~p IY-72 and 73 of the permit application). The applicant has not specified that sediment controls for the coal transport and storage system will be imple- mented prior to construction, but provisions must be made to do this (see "Stipulations" in this section of the TEA). 18