A Montana utility installed a new 4.5 mile 100kV transmission line and 36 power poles between a 100 kV Interconnect Substation and a 25kV Collector Substation. WET prepared, submitted, and secured a U. S. Army Corps of Engineers (USACE) Section 404 Permit. The construction of the transmission line resulted in crossings through 11 intermittent waterways. Fill material, crossing mats, and/or culverts were installed to make the project successful.