The project included the replacement of an existing 22-foot span bridge over Lopatcong Creek with a three (3) sided box culvert. The new culvert was widened by approximately 11 feet with an effective span of 24 feet. The upstream face of the culvert was located one (1) foot upstream of the existing bridge, and the downstream face of the culvert was located ten (10) feet further from the existing bridge along the flow direction.

The project involved the use of a temporary bridge to maintain traffic so that the entire culvert could be constructed in a single stage. This recommendation was based on several factors which included: a significantly shorter construction duration (4 – 6 months vs. 12 months); a lower construction cost; and, a decreased impact to the motoring public.

Boswell estimated that the temporary bridge option would add approximately ten (10) additional feet of disturbance into the wetland area versus a two-stage construction of the culvert. The environmental permitting required an Individual Wetlands Permit, Individual Flood Hazard Permit and a Highlands Applicability Determination.