Tatnuck Brook begins in Holden, as the outlet of Holden Reservoir Number Two. It travels into Worcester where it is the feeds Cook’s Pond, Patch Reservoir, Patch Pond, Coes Reservoir and Coes Pond.
The Tatnuck Brook watershed is small, measuring about 11.2 square miles. Land use in the upper portion of the watershed is mostly forested, and protected open space as it drains to drinking water reservoirs for the City of Worcester, Holden Reservoirs Number One and Two. As the stream travels south to Worcester, land use become much more developed. As an urban waterway, the path of Tatnuck Brook has been greatly impacted by development of the City of Worcester and the Worcester Airport (currently managed by MassPort).
Tatnuck Brook is a headwater of the Blackstone River, which feeds into the Seekonk River north of Providence Rhode Island.
Tatnuck Brook Watershed Association 