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-13- Stipulation No. l: THE PERMITTEE WILL INSTALL A STAFF GAUGE AT SEDIMENT POND 4 TO INDICATE SEDIMENT LEVEL. THE POND SEDIMENT LEVEL WILL BE MAINTAINED AT LESS THAN 1.75 ACRE FEET OF SEDIMENT. THE STAFF GUAGE WILL BE INSTALLED WITHIN ONE MONTH OF ISSUANCE OF THE PROPOSED DECISION. Sediment Pond 6 The applicant proposes to leave Sediment Pond 6 as a permanent stockpond. The following stipulation is required: Stipulation No. 2: THE PERMITTEE WILL REGISTER THE PIT 5/6 SEDIMENT POND WITH THE COLORADO DEPARTMENT OF WATER RESOURCES. THE FORM REQUIRED IS FOR LIVESTOCK WATER TANK - AS BUILT STRUCTURE. THE POND MUST BE REGISTERED PRIOR TO FINAL BOND RELEASE. Diversion and Collection Ditches Potential erosive velocities have at the Grassy Gap Mine. Erosion problem. Enlargement and/or rock ditch segments where steep slopes protection is being handled as a stipulation. been calculated for certain ditch segments in the ditches has recently been noted as a riprap lining is being required in those have resulted in downcutting. The channel violation abatement rather than a permit Surface Water Monitoring The surface water monitoring program presently consists of monthly field parameters checked at 10 surface water stations in the mine area. The operator has proposed to modify this program to include only SWl and SW4 and exclude all ephemeral and intermittent sampling sites. This proposal is not acceptable due to the fact that the program would not adequately detect the impacts of mining on surface water. Therefore, the following stipulation is needed. Stipulation No. 3: 1. THE PERMITTEE WILL TEST THE FOLLOWING SURFACE WATER SITES MONTHLY FOR FIELD PARAMETERS OF TEMPERATURE, pH, CONDUCTIVITY, AND DISSOLVED OXYGEN. SW1 SW4 SW2 SW7 SW3 SW8 FLOW IS TO BE VISUALLY CHECKED AT EACH SITE NOTING NO FLOW, LOW, MODERATE, OR HIGH FLOW. MONTHLY FLOW READINGS ARE TO BE CONTINUED AT SW4.