Overview:
Big Horn Mitigation Bank is a 101.73 acre site located in Big Horn County, Montana. Big Horn was approved by the U.S. Army Corps of Engineers Omaha District in December 2024 for a potential of 33.04 wetland credits and 38,552 stream credits.
The Big Horn mitigation work plan provides almost exclusively for enhancement of wetland resources, and preservation of stream resources with modest enhancement of riparian areas. There are significant existing aquatic resources to be enhanced via hydrologic improvements such as removal of fill and culverts at avulsed channels.
Big Horn Mitigation Bank is approved to offset wetland and stream impacts within the Middle Yellowstone Montana Service Area. The Middle Yellowstone Montana Service Area encompasses the Pryor (HUC 1007008), Yellowstone-Pompeys Pillar (HUC 10070007), Big Horn Lake (HUC 10080010), Lower Bighorn (HUC 10080015), Little Bighorn (HUC 10080016), Shoshone (HUC 10080014), Rosebud (HUC 10100003), Lower Yellowstone – Sunday (HUC 10100001), Big Porcupine (HUC 10100002), Upper Tongue (HUC 10090101), and the Lower Tongue (HUC 10090102) basins.
