Civil Engineering

Since Hahn Engineering first began providing professional engineering services to Washington, Idaho and Montana, it has been dedicated to providing our clients with technically innovative and cost effective solutions in civil engineering. Hahn Engineering has vast experience in a variety of civil engineering fields including residential, commercial and municipal. No project is too small or too large and can range in construction cost from $50,000 to $110,800,000. Hahn Engineering has worked on many private and public funded projects and has established professional relationships with many municipal, state and federal agencies along with the private sector. No matter if it is a 20-lot subdivision, 8-story addition to a hospital or a complete water system analysis for a local community, Hahn Engineering Inc. has the staff and commitment to provide professional engineering services to all sizes and types of civil engineering projects.


Civil engineering Services we provide

  • Site Grading Design
  • Earthwork Volume Analysis
  • Stormwater Drainage Planning and Design
  • Domestic Water and Fire Protection Distribution System Analysis and Design
  • Sewer and Wastewater System Planning and Design
  • Full Site Planning and Design
  • Resource Engineering and Stream Bank Stability Analysis and Design
  • Earthen Dam Site Analysis and Design
  • Watershed Modeling and Runoff Analysis
  • Slope Stability Planning and Design including Structural and Non-Structural Measures
  • Retaining Wall Systems

What We've Achieved

  • Sacred Heart Medical Center, Sisters Of Providence
  • Spokane Tribe Economic Project (S.T.E.P.), Spokane Tribe of Indians
  • Spoko Fuel SR2 Redesign, Spokane Tribe of Indians
  • Flint Road Extension, Spokane International Airport
  • Concourse "C" Parking Lot Expansion, Spokane International Airport
  • Sewer Lift Station (Francis and Market), WSDOT
  • Booster Station and Water System Analysis and Design, City of Colfax
  • Wastewater Application System Design, Stevens County P.U.D.