Teichert Construction began implementing their water control plan in the Brushy Creek Bridge widening area. Water control or dewatering of Brushy Creek consists of establishing a "dry" work zone in the creek in advance of actual bridge widening construction. The water control plan (also referred to as dewatering plan) consists of installing a silt filter barrier at the downstream work limits and upstream cofferdams. The existing creek flow is diverted through a plastic pipe so clean upstream water bypasses the work area and is discharged downstream of the work area. The silt filter barrier at the downstream end ensures that any work zone runoff is treated prior to flowing downstream of the work area. Initial water quality sampling that compares upstream and downstream water quality during this dewatering operation indicates that none of the operations have adversely impacted the creek water quality. County Construction Inspection provide biological monitoring to identify and manage wildlife encountered during creek work since California red-legged frogs have been sighted this last week.
While creating access to the creek, an excavator makes repairs to the ESA-silt Fence. Maintaining the fence along the project limits is vital in preventing animals from entering the work zone and being harmed as well as treating storm water runoff that may enter the creek.
Looking downstream (from the upstream cofferdam area), Teichert Construction begins to secure the dewatering bypass pipe with existing river rock.
Looking downstream (from the upstream cofferdam area), Teichert Construction begins to secure the dewatering bypass pipe with existing river rock.
