Eckert_Bridges_SWPPP_Narrative.pdf

This is a Stormwater Pollution Prevention Plan (SWPPP) narrative document for the City of Boise, Idaho, supporting the Eckert Road Bridges 2147 and 2148 construction project. The project encompasses demolition of existing bridge structures, construction of new bridges over the Boise River and Ridenbaugh Canal, and construction of a single-lane roundabout at the Eckert Road and Boise Avenue intersection. Additional work includes reconstruction of roadway approaches, a multi-use pathway along the west side of Eckert Road, a Greenbelt underpass beneath Eckert Road, modifications to Barber Park driveway access, roadway excavation and embankment, pavement construction, curb and gutter work, sidewalks, retaining walls, drainage improvements, utility adjustments, traffic control, permanent signing and markings, illumination, and landscaping. The SWPPP narrative outlines erosion and sediment control measures and environmental protection protocols necessary to comply with regulatory requirements and protect water quality during construction activities.

The document details stormwater management practices, best management practices (BMPs), and pollution prevention strategies required throughout the project duration to minimize impacts to the Boise River, Ridenbaugh Canal, and surrounding environmental resources. All work involving irrigation and bridge construction must comply with the NMID (North and Middle Idaho Irrigation District) Approval Letter dated July 16, 2026, unless otherwise approved by the irrigation district. The SWPPP narrative serves as a technical compliance document ensuring contractors implement appropriate sediment and erosion control measures consistent with state and local environmental regulations and project specifications.