Working closely with the Forest Service, Morrison-Maierle Inc. developed a modified design that incorporates a post-tensioning system into the glu-laminated stringers. The post-tensioning system allows the stringers to withstand the significant snow loadings and provides a long-term solution to remote trail bridge construction restrictions. The public may now safely enjoy the benefits of the Cabinet Mountains Wilderness trail system and can most certainly look forward to similar applications of this hybrid, post-tensioned packable trail bridge design.

Water Resources

Big Hole River Diversion Dam

DOWL HKM

The project was initiated by the city and county of Butte-Silver Bow (BSB) to repair or replace the existing diversion dam and associated intake structure. The previous water system was over a century old and had been originally constructed to meet the needs of the copper mines and related mining industry in Butte and the surrounding community. Due to its age, the facility was in poor condition and posed an imminent threat of failure or malfunction, which would deprive the citizens of Butte of potable water. DOWL HKM and their team joined together with the BSB Public Works Dept. and Mungas Co. to tackle the many issues surrounding the diversion dam. DOWL HKM provided engineering and design, environmental compliance and permitting, and construction services to assist BSB in the rehabilitation of the dam and intake structure.

Studies, Research and Consulting

Helena Regional Airport Master Plan

Morrison-Maierle Inc.

Morrison-Maierle completed the master plan, normally a one- to two-year process, in nine months to accommodate the airport authority’s reauthorization process. The end result is a prioritized, financially viable improvement plan that addresses the needs of the whole airport for the long-term.

Special Projects Category

Crow Irrigation Project - Emergency Flood Repairs

DOWL HKM