# U.S. Army Corps of Engineers The U.S. Army Corps of Engineers (USACE) is the federal agency that regulates the discharge of dredged or fill material into waters of the United States under Section 404 of the Clean Water Act. Its Little Rock District is the permitting authority for the stream crossings at the [[AVAIO Digital Partners|AVAIO]] "Project Leo" data center. ## Roles in this corpus - **Clean Water Act Section 404 permitting.** The Project Leo build requires fill at three roadway crossings of streams in the Fish Creek watershed. [[Stantec]], for AVAIO, submitted a Pre-Construction Notification for [[Nationwide Permit]] 14 (Linear Transportation Projects) and NWP 39 (Commercial and Institutional Developments) to the USACE Little Rock District — file SWL-2025-00064 ([[Project Leo Engineering and Environmental Permits]]). USACE approval of the stream crossings was an outstanding condition of Pulaski County's site plan approval. ## Notes The USACE is a federal agency, not a custodian in the Arkansas FOIA effort; it appears here as the federal permitting authority named throughout the Project Leo environmental file. Its permit records (file SWL-2025-00064) are obtainable from the Corps directly.