Laserfiche WebLink
8 <br />19 illustrates the Plan View of the Proposed Physical Condition and Figure 20 illustrates a cross- <br />section of the restored conditions of the Channel. <br /> <br />Construction access (Figure 22) to this site will be from the north from the existing road. Silt fence <br />will be installed around the east and west sides of the fill area between the fill and wetland areas <br />and along the south edge of the fill toward the gravel bar. An excavator or front end loader will <br />be used to remove the fill material to match the contours shown on Figure 20. Work will start on <br />the south end of the fill and progress to the north. The excavated material will be loaded into a <br />truck and hauled to an upland site for disposal. <br /> <br />It should be noted that the High Flow Channel may fill with sand and gravel from flood events in <br />the future, change the hydrology of the site, and create conditions appropriate only for upland <br />plants. Under this natural scenario, it would not be possible to restore the wetland in the High <br />Flow Channel. <br /> <br />3.2 Proposed Remedial Work – Right Bank <br />3.2.1 Herbaceous Wetland <br />The 10,464 square feet of impact to the Herbaceous Wetland will be restored. Please note, 190 <br />square feet of fill around an existing tree will not be removed as it might result in the loss of the <br />tree. However, the restoration site will be enlarged by 190 square feet to result in a restoration <br />area of 10,464 square feet. Specifically, the berm in the wetland will be removed and the <br />restoration site will be excavated to a depth that is about six inches lower than the existing <br />wetland (Figure 21). A new gravel pit pond containment berm will be constructed approximately <br />40 feet to the west of the existing berm. This berm will cross the existing pond outlet channel and <br />tie into an old, existing berm surrounding the north side of the gravel pit. Material from the <br />existing berm may be used for constructing the new berm. <br /> <br />Construction access (Figure 22) to the right bank Herbaceous Wetland fill area will be from the <br />south through the existing gravel pit area. Approximately 300 linear feet of silt fence will be <br />installed around the north, east and southeast sides of the fill area between the fill and the <br />unimpacted wetland areas and between the fill and the pond outlet channel and River. <br /> <br />An excavator or front end loader will be used to remove the fill material and create a slight <br />depression a few inches below the grade of the adjacent wetland. The fill removal work will <br />begin in the northeast corner fill (near the River) and progress in the west and southwesterly <br />direction. The excavated material not used for the new berm will be loaded into a truck and <br />hauled to an upland site for disposal. If the site is too soft for a truck to enter, the excavated <br />material may be stockpiled in the pit area and then loaded into a truck for removal. <br /> <br />Approximately ten cubic yards of 8”-12” diameter riprap will be placed along the edge of the <br />River where sediment is removed from the 25 foot long area adjacent to the River to prevent <br />future bank scour. <br /> <br />3.2.2 Low Water Crossing <br />No excavations or fills occurred at the Low Water Crossing, therefore no earthwork is necessary or <br />proposed at this site. However, the wetland will be restored. <br /> <br />3.3 Limits of Construction <br />The Construction Plan Map (Figure 22) illustrates the limits of construction, disposal area, access <br />roads, silt fences and areas to be restored. <br />