Dredging Update 2-26-13

 Active construction of the berm began on 02/11/2013, and is now nearly complete with some finish up work remaining. Dredging operations are also nearly complete. Grading work of the dredge placement area will be completed this week.

·         Badgerland will be building the berm to elevation 778.5' to account for the settling/sinking of the stone. When permanent stabilization measures are implemented in the spring, the berm will be set to the final grade of 778'.

·         All erosion control measures in place and appear to be functioning appropriately, including the tracking pad and the silt curtain.

·         Silt sock has not been placed in the dredge area and it is no longer practical to do so. As water levels have risen, Badgerland instead built ice roads to connect to the existing silt curtain to provide continuous containment. Silt socks are no longer necessary in the dredge placement area as the berm is now providing containment.

·         Temporary stabilization will be completed after the dredge placement area has been graded. A 12" silt sock filled with ground, untreated wood will be pinned along the top of the berm with rebar in order to provide temporary stabilization of the dredge fill area. The specific product will be a Silt Sock manufactured by Silt Sock Erosion Control Products. The silt sock will be removed when the permanent stabilization of the site occurs later in the spring after planting. Soilnet Polymer Solution's TRIPAM will be applied at an application rate of 54 lbs/acres. As discussed with the DNR, TRIPAM is a Type B polymer that meets the criteria listed in the WisDOT PAL, meets the requirements of WDNR Code 1050 (Land Application of Anionic Polyacrylamide), and the meets requirements regarding acute toxicity.