Restoration efforts, with USFWS funding support, began in December 1991 with the Onion Bottoms site, an area that historically grew mint and onions. After abandonment, exotic reed canary grass infested the east half, with lowland tree species establishing on the west half.
Subsurface drainage tile line location identified by excavating perpendicular to expected drainage outlet flow. (Dec 1991)
New plastic tile is connected to intact underground drain tile, an anti-seep collar installed and the open end of the new tile line is placed at the elevation of the designed high water level of the restored wetland basin. Once backfilled, this passive waster control structure will drain away excess water that exceeds the designed high water level. (Dec. 1991)