Assessment of Tile Drainage Systems in Addison County and the Jewett Brook Watershed

Braun, D., Stone Environmental Inc., (2023). Assessment of Tile Drainage Systems in Addison County and the Jewett Brook Watershed (Technical Report # 104). Grand Isle, VT. Lake Champlain Basin Program.

• Dataset 1

In Vermont and across the Lake Champlain Basin, the extent of tile drainage systems and their
potential impacts on water quality have not been adequately assessed. A previous study by
Stone Environmental (Stone) for the Lake Champlain Basin Program in the Jewett Brook
watershed in Franklin County (Braun et al. 2019) revealed that subsurface drainage systems in
agricultural fields can discharge significant quantities of phosphorus (P). This project adds to the
previous work by measuring nutrient and sediment concentrations and loads in tile drainage
water in a second agricultural area, Addison County, and comparing these values with nutrient
and sediment concentrations and loads measured in tile drains in the Jewett Brook watershed.