Clarks Creek Sediment Removal Demonstration
All permit applications have been submitted for this in-water work.
With issuance of the HPA for WDFW - expected in February 2014, the City will be able move forward with development of bid documents. The City anticipates issuing two contracts - one for the in-stream construction/dredging work, the second for monitoring as required by the HPA permit.
It is anticipated for the demonstration project to take place during the in-water work window: June 15 and August 1, 2014.
The demonstration project will involve a hydraulic dredging process to remove accumulated sediment from a 400-foot section of Clarks Creek. The method is meant to remove sand and smaller-sized particles, leaving cobbles and larger rocks.
The purpose of the demonstration project is to evaluate the permitting process and regulatory requirements, determine the effectiveness of the method, determine the underlying condition of the creek bed, determine if cobbles/rocks present, evaluate the depth of accumulated sediment, analyze the environmental and habitat impacts, and monitor the long-term effectiveness of the project including the rate (if any) of sediment loading back into the demonstration area.
The City is currently constructing several projects that will reduce the sediment loading to Clarks Creek. In addition, several projects are budgeted for 2014, with more in the conceptual stage for future development when funding is available. Such projects include:
Requirements imposed by the project permits including the following monitoring activities for the demonstration project: