We have just completed the general arrangement drawings for our 9th forestry bridge within the last year. These bridges are typically a combination steel superstructure and pressure treated wood cribs. Spans range from 10m to 30m with steel “I” beam superstructures in the shorter spans and steel panel bridge design in the 25m+ spans.

Most recently a large panel bridge is proposed for crossing the Wanapitei River. It is located approximately half way between Timmins and Sudbury. The site has an extensive approach of low bearing capacity soils on the north side of the river. Geotechnical investigation was subcontracted to a Sudbury firm and the results were not encouraging. The proposed road approach and crib foundation is on 3m+ organic on top of 3m+ loose soils, basically no bearing capacity. As such, the forestry firm is debating what course of action to take. Remedies include pile driven support or micro piles at the crib foundation location.