2008 Annual Monitoring Report (pdf 10.9MB) - Bolsa Chica ...

Bolsa Chica Lowlands Restoration Monitoring
2008 Annual Report
First, consideration should be given to dredging to the permitted depth of the final engineering design
depths to extend the period between maintenance events. Dredging at the time of initial construction
was not completed to full design depths within the maintenance basin. If deepening of the
maintenance basin were completed, this would garner additional time between dredging events and
would improve dredging efficiency by capturing a greater volume of sediment in a more localized and
recoverable area nearer the inlet.
Second, the pre-dredging contracting process can consume a considerable period of time and thus work
should be completed to streamline and pre-prepare to the maximum extent practical prior to
maintenance triggers being tripped. This would allow for a reduced period over which the system
functions in an impaired condition prior to completing maintenance dredging. To accomplish this
would require: preparation of the majority of the plans and specifications, completion of permitting
based on a maintenance basin plan and dredge volume range, preparation of bid and contract
documents, and obtaining maximum flexibility for the dredging window of work.
Merkel & Associates, Inc. 142