Boat Ramps and Dewatering

Home / Service Options / Boat Ramps and Dewatering

During the last 8 years, Drennon has had great success with multiple boat ramp replacement projects in Alaska. In fact DCC was a key player in pioneering the dry dam method now a standard requirement in most of the Department of Natural Resources (DNR) boat ramp projects. In fact, it was the highly successful Harding Lake SRA Facilities Boat Ramp Replacement Project performed by DCC in 2008, that prompted DNR to incorporate a standard dewatering requirement using similar dry dam systems into all their future boat ramp replacement projects going forward.

DCC and its employees have gathered invaluable experience on other large scale dewatering projects as well. The Marx Creek Spawning Channel Rehabilitation Project required the dewatering of a fast moving creek system where a total of 12 locations required both dewatering and bypass in order to install weir systems at specified locations throughout the creek. Using a combination cofferdam and pumping system where both large bypass and dewatering pumps were incorporated. DCC successfully dewatered the 12 locations, bypassing upwards of 25 CFS of clean water, and 10 CFS of turbid water into energy dissipaters, and sediment dewatering bags to allow for the weir installation during a very tight 30 day fish passage window allowed by permitting constraints.

Later in 2013 DCC would go on to its most challenging project to date, the Alaganik Slough Boat Ramp Replacement Project in Cordova, Alaska. Never one to back down from a challenging job, DCC took on dewatering the tidal influenced Alaganik Slough. This slough which runs from North to South during high and low tides, would change elevations and depths of more then 12 feet in a single day. This constant change in conditions would prove to be quite the challenge, and quite the reward as well, ultimately providing DCC with another extremely satisfied customer in the USDA Forest Service .