General Information
The Big Thompson Confluence Mitigation Bank provides a compensatory mitigation alternative for stream and wetland impacts in a region currently underserved with mitigation options. The Bank site is located at the confluence of the Big Thompson and South Platte rivers in Weld County, Colorado. The Big Thompson Confluence Mitigation Bank is the first mitigation bank approved in the Denver metro area in 20 years.
The principal objective of the 72.4-acre site is to reestablish high-quality wetlands, which will include 34.76 wetland credits and 460 functional feet of stream credits to fulfill 404 mitigation requirements. Other objectives include increasing floodplain connectivity to increase refugia for native fisheries, food-web production, and other ecosystem services, and improving flood resiliency of local communities. It provides habitat for sensitive species such as the Preble’s Meadow Jumping Mouse, the Orangespotted Sunfish, and both the Golden and Bald Eagle. A permanent conservation easement is held by Colorado Open Lands, and a long-term endowment has been established to fund site management held by the National Fish and Wildlife Foundation.
The primary geographical service area for this bank will encompass portions of the Middle South Platte-Cherry Creek 8-digit HUC 10190003 and the Big Thompson 8-digit HUC 10190006, as well as portions of adjoining 8-digit HUCs within the USEPA Level III High Plains Ecoregion and USACE Omaha District Regulatory Boundary in the state of Colorado. At the discretion of the US Army Corps of Engineers, credits may be approved outside of the primary geographic service area.
Westervelt Ecological Services (WES) is the authorized agent and representative for credit sales.
Service Area Map
Service area:
The primary geographical service area for this bank will encompass portions of the Middle South Platte-Cherry Creek 8-digit HUC 10190003 and the Big Thompson 8-digit HUC 10190006, as well as portions of adjoining 8-digit HUCs within the USACE Omaha District Regulatory Boundary. At the discretion of the US Army Corps of Engineers, credits may be approved outside of the primary geographic service area.
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