Conservation Projects



The goal of the Manalapan Brook and Lake Watershed Restoration project focuses on rehabilitating the watershed, which stretches from Millstone Township in Monmouth County to DeVoe Lake in Spotswood within Middlesex County.

A watershed plan was developed by local project partners and approved by the New Jersey Department of Environmental Protection. This plan recommends actions needed to reduce rainwater runoff sediment, and nutrients (such as phosphorus) in the brook and lake. When it rains, runoff washes sediment into the brook. Soil is also flushed from streambanks during storm events Sediment eventually ends up deposited in Manalapan Lake in Monroe.

Excess sediment from soil erosion makes it impossible for fish and insects living in the stream and lake to survive. Expensive lake and stream dredging is needed to remove sediment build up.

Click on the map to learn more about local projects that will improve water quality and reduce rainwater runoff (also called stormwater runoff), to the brook and lake.

Floating Wetland Islands

Floating wetland islands use recycled plastic material which are planted with native wetland plants that, along with microbes in the island, remove harmful nutrients from the water column. The islands shown in this video were installed in Thompson Park in the Township of Monroe in 2014.

Project Partners include:

Freehold Soil Conservation District, Princeton Hydro, Rutgers Cooperative Extension of Middlesex County, Middlesex County Planning Department, Middlesex County Office of Parks and Recreation, Township of Monroe, and Township of Manalapan.