GAO Report Highlights Need for Greater Consistency in Mitigation Oversight

A newly released Government Accountability Office (GAO) report is shining a spotlight on a concern many in the mitigation banking industry have raised for years: inconsistent implementation of the federal compensatory mitigation program across U.S. Army Corps of Engineers districts.  

Under Section 404 of the Clean Water Act, the Corps requires compensatory mitigation when permitted activities impact wetlands, streams, or other aquatic resources. The 2008 Mitigation Rule was specifically designed to create a more predictable, science-based framework for mitigation, while prioritizing mitigation banks as the preferred option for offsetting unavoidable impacts.  

According to the GAO, oversight has improved since its previous review in 2005. Districts are conducting more compliance inspections and maintaining better monitoring documentation. However, the report found that Corps districts continue to apply key mitigation requirements inconsistently, particularly regarding financial assurances, long-term management, and performance standards.  

For mitigation bankers, this finding is significant. Regulatory inconsistency creates uncertainty for project sponsors, investors, permittees, and environmental stakeholders alike. A mitigation bank operating in one district may face entirely different expectations than a comparable project in another district, despite both operating under the same federal rule.

The GAO recommended that Corps headquarters develop clearer national guidance to help districts implement mitigation requirements more consistently. The Department of the Army reportedly agreed with the recommendation.  

For the mitigation banking industry, consistency matters. Predictable implementation supports investment in high-quality mitigation projects, improves ecological outcomes, and helps ensure the 2008 Rule functions as intended. As federal agencies continue reviewing Clean Water Act implementation and Waters of the U.S. policies, this report serves as another reminder that effective mitigation depends not only on strong regulations, but also on consistent execution in the field.