Stream & Fish Passage
DCG performs site evaluation and assessment, and design of drainage structures to enhance and restore fish passage and streams. We provide technical assistance in the construction of culverts and other stream barriers for migratory and riverine fish.
Our services include production of mapping, plan sections, and elevations, river modeling, hydrologic assessment of watersheds and evaluation of stream flow, rainfall, runoff, flooding, and fish passage flows, sediment transport, erosion, and hydraulic analyses of spillways, weir flow, river flow, stream velocity, and pipe discharge.
Fauntleroy Creek Culverts Replacement
DCG is the prime consultant leading a team of nine subconsultants through the Options Analysis and Preliminary Engineering phase for the replacement of two culverts and associated stream restoration on salmon-bearing Fauntleroy Creek in southwest Seattle.Lyon Creek Flood Mitigation
While solving serious flooding problems in the Lake Forest Park Town Center area, the project gave the creek an opportunity to improve fish passage by evening out the stream channel profile and eliminating partial migration barriers, greatly increasing vegetative cover, and improving overall habitat diversity.McAleer Creek Bypass Facility
DCG led a team in the modeling, options analysis, design, plans, specifications, construction cost estimating, permitting, and construction inspection of a retrofit to reduce sediment build-up, improve fish survivability, and improve safety and maintenance at an existing diversion and bypass pipe intake facility.Ballinger Creek Bridge at Brugger’s Bog
Subconsultant on the project for wetland delineation, survey, stream channel design, planting plan, bridge sizing, structural footing design, local, state and federal permitting, initial site assessment through final project plans, and construction documents.
Fauntleroy Creek Culverts Replacement
DCG is the prime consultant leading a team of nine subconsultants through the Options Analysis and Preliminary Engineering phase for the replacement of two culverts and associated stream restoration on salmon-bearing Fauntleroy Creek in southwest Seattle.
Lyon Creek Flood Mitigation
While solving serious flooding problems in the Lake Forest Park Town Center area, the project gave the creek an opportunity to improve fish passage by evening out the stream channel profile and eliminating partial migration barriers, greatly increasing vegetative cover, and improving overall habitat diversity.
McAleer Creek Bypass Facility
DCG led a team in the modeling, options analysis, design, plans, specifications, construction cost estimating, permitting, and construction inspection of a retrofit to reduce sediment build-up, improve fish survivability, and improve safety and maintenance at an existing diversion and bypass pipe intake facility.