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9 <br />3.4 Sediment & Erosion Control Structures <br />Work will be performed during a period when the water level in the River is low. Figure 22 <br />illustrates the location of silt fences and the erosion control fabric. <br /> <br />3.5 Methods to Minimize Adverse Impacts <br />The earthmoving contractor will be informed of the project goals and will be supervised by the <br />project hydrologist and ecologist. The existing wetland adjacent to the fill on the left and right <br />banks will be protected by construction fencing and equipment operators will be notified that no <br />earthmoving is to occur in these areas. Similarly, the High Flow Channel Wetland on the left <br />bank upstream and downstream of the fill area will be protected. <br /> <br />3.6 Equipment, Access & Fill Removal <br />Equipment used for the project will include an excavator, front end loader and dump truck for <br />excavating, loading and hauling excavated materials to the disposal site. The existing roads, <br />which extend west from Colorado Highway 52 to the fill sites, will be used as the equipment <br />access. <br /> <br />3.7 Fill Disposal Area <br />The excavated fill material will be placed in the upland area as illustrated on Figure 22. <br /> <br />3.8 Finished Grades & Restored Physical Condition <br />The Plan View of Figure 19 and the cross-sections in Figures 20 and 21 illustrate the proposed <br />finished grades of the fill sites on the left and right banks. <br /> <br />3.9 Location of Wetlands to Restore <br />Figure 19 illustrates the location of the three wetlands to restore. They include the 351 square <br />foot High Flow Channel on the left bank, the 10,464 square foot Herbaceous Wetland on the right <br />bank, and the 57 square foot Low Water Crossing Wetland on the right bank. <br /> <br /> <br />4.0 Work Plan & Schedule <br />Table 4 illustrates the seven tasks of the Work Plan and the start, duration and completion time for <br />each. <br /> <br />4.1 Consult with Corps <br />Before implementing the Work Plan, Builders Aggregate Company shall consult with the Corps to <br />determine if any work to be performed pursuant to the Administrative Order (AO) requires a <br />permit. If a permit is required, it will be obtained and a copy will be provided to the EPA prior to <br />initiating any such work. <br /> <br />4.2 Site Preparation <br />Task 2, Site Preparation, includes four subtasks. The limits of construction will be clearly staked <br />and flagged and the sediment control structures illustrated by Figure 22 will be installed before <br />any other work will commence. The boundaries of the two fill removal areas will be staked and <br />flagged, as will the sediment relocation site. <br /> <br />4.3 Fill Removal & Final Grades <br />First, the fill material in the High Flow Channel on the left bank will be removed and transported <br />to the disposal site. Next, the final grade of the Channel will be established. Next, work will