The removal of sediment from the pond has always been one of the fundamental goals of this project. Our plans, as approved by MDEQ, very clearly states what is the amount permitted to be removed from the pond and displaced on the TNC site (approx. 1,100 cubic yards).
If you recall (see our July 17th post) the heavy clay material that was found to be suitable for the expansion and reinforcement of the berm, was to be be dug, transported within the pond, and used as such. The sediment, which is composed of more muck and peat, was to be disposed at the OHAC access site (near parking lot), the Anita Jones access site (north of OHAC parking lot), the amphitheater, and used to re-construct the nesting island. Based on the original plans we were also to take this sediment that was being removed from the pond and transported within the confines of the pond (with minimal use of trails) to the specified disposal areas.
Once again on-site conditions of the pond (i.e. the amount of water, saturated sediment, and the inability to find the required clay) changed the disposition, placement, and transport of the sediments that have been removed from the pond. The berm was built using imported clay. The nesting island is still being built with sediment from the pond. The OHAC access site (near parking lot) will still get sediment from the pond. There is no sediment going to the Anita Jones access site (north of OHAC parking lot) and very little (if any) to the amphitheater. The remaining sediment is now being placed on the Thurston school grounds.