Our services

Civil Engineering

LDES offers Civil Engineering services to private developers, municipalities, counties, the state of Washington, and Native American tribes in Whatcom, Skagit, and Snohomish Counties.



Planning & Site Development

Our experienced staff provides professional services in planning, designing, and project management for
commercial developments and residential/commercial subdivisions. Planning and site development include:

  • Roadway and Site Design
  • Sewer and Water Main System Design
  • Drainage/Stormwater Management Design
  • Pedestrian Facility Design
  • Coordination with local agencies
  • Permitting Assistance Cost Estimate Preparation
  • Bid Document & Specification Preparation
  • Bidding Assistance Project Management
  • Civil Inspection SEPA Support

Stormwater Management

The engineering staff at LDES plans, authorizes, and designs efficient storm management systems that are cost effective and environmentally conscious. These services include:

  • Stormwater Management System Design
  • Preparation of Erosion & Sediment Control Plans
  • Certified Erosion & Sediment Control Lead (CESCL) Inspection
  • Hydraulic Modeling
  • Permitting Assistance
  • Preparation of Stormwater Pollution Prevention Plans (SWPPP)
  • NPDES Support



Water Distribution and Sanitary Sewer

Our staff has a strong background on water resources, including domestic water and sanitary sewer facilities. We have extensive experience in planning, design and permitting procedures regarding domestic water and sanitary sewer facilities, both the municipal distribution and collection systems, and large onsite sanitary sewer

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Whatcom County, WA
Goshen Rd/Anderson Creek Bridge
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