Stream & Wetland Mitigation Solutions Across the Midwest

Helping developers, agencies, and landowners navigate compensatory mitigation with ease and compliance.

Who We Are:

Tetonka, LLP was established in 2006 with the purpose of pioneering wetland mitigation in the state of South Dakota.  Wetland mitigation offers an avenue to offset unavoidable impacts to wetlands due to commercial or civic development projects through the purchase of approved compensatory credits from an Army Corps of Engineers’ federally approved bank site.  This mitigation process is governed under Section 404 of the Clean Water Act.  The bank sites are approved and monitored by the Corps of Engineers, Omaha District and the Inter-Agency Regulatory Team.

Tetonka, LLP, began with its first two bank sites in the Lower Big Sioux (LBS) Service Area of SD:  Tetonka 1 (2008) an Tetonka 2 (2009).  Tetonka then went on to add the Jandl Bank Site (2017) in the LBS and the Hatch Bank Site (2017) in the Upper Big Sioux Service Area of SD.  Tetonka then expanded into the Red Service Area of ND with the Mekinock Bank Site (2020). 

Tetonka continues to expand. Two new bank sites were federally approved in June 2025: Farr’s Landing Bank Site (LBS) and the Little Coulee Bank Site in the Minnesota/Red Service Area of SD.  Two additional banks are currently pending federal approval: the Wink Meadows Bank Site in the UBS and Sourdough Flats Bank Site in the Bad/Cheyenne Service Area of western SD.

With nearly 2 decades of experience, the partners of Tetonka continue their dedication to environmental sustainability and habitat stewardship through wetland mitigation.

What We Do

What is Mitigation Banking?

Mitigation banking is the creation, restoration and/or protection of areas of wetlands and streams in advance of, and as an offset (mitigation) for, anticipated impacts to those resources within the same watershed.