LEI’s full service civil engineering shop is highly experienced and skilled at civil site design, commercial and industrial development, residential design, stormwater treatment, hydraulic design, and roadway engineering.  From the planning stages to construction, we create the strategies that transform empty lots and crowded urban landscapes into useful assets to the community.

Key to LEI’s success are open communications with our clients from the onset of a project through final project closeout.  We work to gain a thorough of client objects, needs, project constraints, and budgets and then work to tailor an engineering approach to client needs.  Our objective is always to provide our clients with the greatest return on investment possible through highly specialized and proven engineering techniques.  

Moreover, LEI has been in business for over 30 years.  This means that we understand the ebbs and flows of the Pacific Northwest economy and can help our clients successfully complete projects to meet current and foreseeable future market conditions.   Our clients success is our success.  LEI takes great pride in meeting our clients needs and doing our absolute best to make our clients happy.

 

Commercial Civil Site Design

  • Grading and Finish Floor Elevations
  • Lot Layout
  • Road and Pedestrian Pathway Design
  • Stormwater Collection, Conveyance and Treatment
  • Sanitary Sewer Collection, Conveyance and Treatment
  • Grading and Finish Floor Elevations
  • Permitting
  • Construction Documents and Specifications

Roadway Design

Roads not only provide access to a property, they often provide a first impression of the development. LEI's designs provide roads with safe, efficient access to homes and business while remaining pleasing to the eye. Our decades of experience include federal, state and local government contracts and private residential projects.
 
  • Arterial Roadway Design
  • City Street and Rural Roadway
  • Access Management
  • Small Bridge Design for Pedestrians and Vehicular Traffic
  • Traffic Control Design

Hydraulic Design

  • Stream Crossing and Fish Passage Design
  • Stream Channel Modification/Enhancements for Bridge Construction
  • Scour and Riprap Analysis for Culverts and Bridges
  • Stamped Hydraulic Reports for Bridge and Culvert Replacement Projects
  • Pedestrian and Vehicular Bridges
  • Fish Passage Design

Floodway Engineering (FEMA)

  • HEC-RAS Backwater Analysis
  • Erosion Control

Stormwater

  • Stormwater Management Plans
  • Drywell Design / Seepage Trench Design
  • Permitting, including USACE Clean Water Act Section 404 Permits
  • Address Green Space Requirements for City Settings

Residential Engineering

  • Lot Layout and Grading Design
  • Road and Pedestrian Pathway Design
  • Stormwater Collection, Conveyance and Treatment
  • Sanitary Sewer Collection, Conveyance and Treatment
  • Permitting
  • Construction Documents and Specifications