After passing through this area, the Natchaug River begins flowing in a more southwesterly direction, still paralleling Connecticut Route 198.

A small oxbow forms just south of the Reservoir, nearby US 6, causing the boundary of Windham and Mansfield to depart from the river briefly.

[5] As of 2023, the Connecticut Department of Energy & Environmental Protection still mentions a fish consumption advisory in effect for those three rivers.

This stretch is less than a mile but is quite intense, ranking at Class IV on the International Scale of River Difficulty, and with a number of waterfall-like drops.

The river is stocked with trout by the Connecticut Department of Environmental Protection, but several other types of fish also swim in its waters.