Drainage Improvements

What This Service Involves

We design and construct targeted drainage improvements, including regrading, new conveyances, inlets, and infiltration measures, to resolve recurring flooding and standing-water problems. Many Western Washington sites suffer from undersized or aging systems overwhelmed by today's intense rainfall, and our crews correct these deficiencies with solutions sized for current conditions. Work integrates with existing storm systems and meets local stormwater and permitting requirements while minimizing downstream impacts. Completed improvements are documented with as-builts for engineering and maintenance records.

Benefits

Resolves chronic flooding and standing-water complaints; upgrades undersized systems to handle current rainfall; integrates cleanly with existing storm infrastructure; meets local stormwater and permitting standards; delivers as-built documentation for the agency

Our Process

1) Investigate the drainage problem and evaluate improvement options; 2) Design the solution and obtain required permits and approvals; 3) Construct regrading, conveyances, inlets, or infiltration measures; 4) Tie into existing systems, restore the site, and provide as-builts

What Affects the Cost

Project scope and area addressed; earthwork, conveyance, and structure quantities; permitting and downstream mitigation requirements; soil and infiltration conditions; site restoration and traffic control needs

Best Time of Year

Drainage construction is scheduled in the dry season to manage excavation and erosion, with completion targeted before the fall rainfall ramp-up.