Davey Resource Group performed a wetland delineation along the Samuel Cohee Open Drain #690 in Rush County, Indiana, at the request of the Rush County Drainage Board. More than 45,000 linear feet of the riparian corridor adjacent to the open drain was delineated for the presence of wetlands. The corridor delineated measured 75 feet from the top streambank on each side of the stream and encompassed approximately 155 acres.
A U.S. Army Corps of Engineers (USACE) trained wetlands delineator led the field team and assured that all work was performed in accordance with methodology outlined in the 1987 U.S. Army Corps of Engineers Wetlands Delineation Manual and the Midwest Regional Supplement (Version 2.0). A GeoXH™ Trimble® GeoExplorer® 6000 series Dual-frequency Global Navigation Satellite System (GNSS) receiver with an Everest™ antenna using 220 channels, running professional TerraSync™ software capable of decimeter (10–75cm) accuracy after differential correction was used to map the wetlands. A total of 25 wetlands were mapped within the study area along with 196 feet of ephemeral stream and 313 linear feet of intermittent stream.
Davey Resource Group collected all required data to complete a Water Resources Delineation Report. The comprehensive Water Resources Delineation Report was prepared according to USACE specifications and included data sheets, maps, and site photographs.