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<br />III. COMMENTS -COMPLIANCE <br />Below are comments on the inspection. The comments include discussion of observations made <br />during the inspection. Comments also describe any enforcement actions taken during the inspection <br />and the facts or evidence supporting the enforcement action. <br />the watershed, so the culvert is not of critical importance. However, the culvert does improve the <br />efficiency of the drainage control system. When ground conditions allow for safely completing the task, <br />the rock will need to be pulled off the slope and the culvert will need to be replaced or repaired as <br />necessary. <br />There was evidence of recent heavy flow down the major drainage above the Diversion Culvert "A" drop <br />inlet. Flow had scoured around the CMP riser section and had eroded a cavity over six feet deep by <br />several feet wide on the downstream side of the riser. The flow was contained by the containment dike <br />associated with the drop inlet, and all flow did appear to enter the diversion culvert, either over the top of <br />the riser, or through a hole in the riser near the base of the scoured cavity. Maintenance is necessary. <br />Partial dirt backfill, with the upper few feet of the cavity filled in with concrete may be the best <br />approach. <br />A short distance up the drainage channel from the Culvert "A" inlet there is a steep sandstone ledge <br />segment (waterfall). Avery large juniper tree had apparently fallen into the channel and been washed <br />down to the ledge, where it had become lodged. Should it be dislddged by the next large flow event, it <br />could potentially block the culvert inlet, which could lead to flooding of the'coal stockpile area below, It <br />is recommended that the tree be removed to prevent this possibility. <br />The reconstructed sediment pond embankment appeared to be stable, with no evidence of cracking, <br />slumping, or seepage. The embankment and adjacent areas disturbed by the reconstruction had recently <br />been seeded and mulched. A berm had been constructed as requested to divert runoff from the sediment <br />drying area away from the pond embankment and into the sediment pond at an appropriate location. <br />Water level in the sediment pond was just below the elevation of the primary spillway inlet. The inlet <br />valve was closed, and the pond was not discharging. <br />SAE silt fence structures at the topsoil stockpile, construction dirt stockpile, and office area were intact <br />and functional. <br />Maintenance grading and seeding of the scoured diversion segment south and west of the sediment pond <br />and soil stockpiles, as described in the November and December inspection reports, will need to be <br />completed this spring as soon as ground conditions permit. <br />Revegetation <br />Stabilization seeding and straw mulching were recently completed in various recently graded locations, <br />including the pond embankment vicinity, the construction dirt stockpile disturbed by pond embankment <br />construction activity, the construction dirt stockpile SAE outlet area, and the rutted area just north of the <br />haul road across from the sediment pond. <br />4 <br />