[4] Water released into the Pascack Brook flows downstream into the Oradell Reservoir.

When the water levels become low, the old stone bridge over the Pascack Brook becomes visible just south of the causeway.

Several species of fish inhabit the reservoir including largemouth bass, smallmouth bass, carp, pumpkinseed, bluegill, brown and yellow bullheads, as well as large schools of both yellow and white perch.

Numerous waterfowl including various species of ducks and heron also live on and around the reservoir.

On March 11, 2003, Governor of New Jersey Jim McGreevey visited the nearby Lake Tappan reservoir and proposed protecting it, Woodcliff Lake and their tributaries with Category 1 water purity status.