3.2 Water Quantity

  1. Drainage is conveyed through the subwatershed through a series of culverts and channels that should be evaluated, monitored, and replaced or repaired as necessary to maintain conveyance, minimize erosion, minimize hydrologic bounce, and maintain adequate water levels in lakes and wetlands.  The HHPLS and Regional Team input identified one in particular that exhibited some need for maintenance: the culvert that serves as the outlet from the wetland north of Schutz Lake under Highway 7.
  2. Development, redevelopment, and reconstruction in the subwatershed is predicted to increase volume of runoff as well as increase nutrient and TSS loads from the watershed, potentially further degrading water quality in lakes, streams, and wetlands.
  3. Future development in the southern subwatershed could increase volume and velocity of discharge conveyed by the channel that drains the central part of the watershed, and could create erosion and sediment transport issues.
  4. The HHPLS predicted that the outlet of the wetland north of the lake would overtop during 100 year or larger events.  Local plans should identify these observed or potential locations and assess whether the risk of occasional flooding is acceptable or should be addressed.