Kalispell (US-93) Bypass

This project will construct a new, 4-lane limited-access Bypass route to relieve travel demand and congestion on US-93 and US-2 through Kalispell. Stelling Engineers is developing conceptual roadway plans for the 8-mile roadway, including the design of six interchanges and two complex intersections with US-93. The design and construction scope includes project development, intersection alternatives, alignment development, traffic forecasting, bridge design, storm drain, traffic analysis, signalization, lighting, signing, striping, updating of right-of-way plans, survey, geotechnical analysis, utility relocation design, public involvement, final design drawings, special provisions, and related contract documents conforming with the MDT’s project development procedures, design procedures, and design manuals.

The Traffic Analysis scope includes traffic forecasting and analysis of the new Bypass. SEI developed a method to estimate future traffic volumes based on projected land uses (utilizing census data and past projects to establish baseline conditions) and coordinated with local planning agencies. SEI also utilized existing traffic studies to estimate proposed (commercial) growth and traffic impacts. GIS data was integrated into forecasts to ensure recent growth is included. Traffic access and signal warrants are being developed at this time.

Project Description:

• 8-miles of 4-lane Limited-Access Roadway
• 6 Interchanges
• Bridge Design
• Traffic Forecasting
• Utility Relocation
• Public Involvement

Visit the Kalispell Bypass Project Site...

Polson-East (SR 35)

Design of improvements for the complete reconstruction of SR 35 involving the realignment of SR 35 at Highway 93, 1 mile of reconstruction of US 93, new frontage road, traffic studies, signalization, Environment Assessment, Access Management, lighting, landscaping, storm water, ROW documentation and irrigation ditch relocation. This project involved the design of 3 miles of storm drainage improvements, including a 4 acre storm water detention pond, 1.6 miles of urban 3-lane, 1.2 miles of rural roadway, pedestrian trail and bike path on both sides, and tiers of sheet pile retaining walls with “stone look” concrete veneer. This project involved numerous public meetings, coordination with landowners, city, county, and CSKT Tribal officials.

SEI held a pre-design conference with the City to confirm the Scope of Work and needs for the project. Frequent coordination with the City was also required for collection of the engineering data necessary for design. Construction plans and specifications were included with the MDT administered roadway project. Interim construction cost estimates were prepared for both the 50% and 100% design reviews. Final plans were submitted to the Montana Department of Environmental Quality (MDEQ) for review and approval prior to bidding. SEI provided Contractor shop drawing review for equipment for conformance with the plans and specifications. SEI also conducted full-time inspection of the work to insure compliance to the MQ approved plans and specifications.

US 93 - Minesinger Trail - MT 35

Design of improvements for the complete reconstruction of US 93 to widen to a rural four-lane divided roadway, including roadway design, access replacement and relocation, new frontage roads, lighting, landscaping, retaining walls, wildlife underpass crossing, storm water and irrigation ditch relocation. This project includes the design of 3 miles of rural roadway with adjoining pedestrian bike path. This project involved numerous public meetings, coordination with landowners, county, and CSKT Tribal officials.

The Highway 93 grade drops at 6% for a total vertical drop of 200 feet. The design prepared by SEI includes storm water detention ponds, permanent erosion control features, and storm drainage piping. Hydraulic analysis was completed using the SWMM hydrologic model.

Hobson-Utica Highway

Estimated Cost: $6 million

Design of improvements for the overlay, widening, and minor reconstruction of 11 miles of secondary highway between Hobson and Utica. This project included bridge widening, environmental documentation, public involvement, irrigation relocation, and right-of-way plans for 98 parcels.