Site Description

Site ID: SB28
Lebanon Township, Hunterdon County
Stream Category: FW2-TM(C1) (Category 1, Trout maintenance waters)
Site monitors Raritan River South Branch (StoneMill gage to Califon) subwatershed (HUC: 02030105010070)
The site is located at the lower end of Ken Lockwood Gorge.

This is a restoration site and is being actively monitored for temperature year-round. Only one year of pre-restoration data has been collected to date.

What is being monitored at this site?

  • Biological and Visual Assessments (?)
  • Chemical Testing (?)

Water Quality Data

Each June, Raritan Headwaters scientists and volunteers visit 72 stream sites in the North and South Branch Raritan Watershed Region (WMA8) of New Jersey to collect data on the health of our streams.  Data collected includes a sample of benthic macroinvertebrates (used to calculate the High Gradient Macroinvertebrate Index;HGMI score), an assessment of the habitat in and around the stream, and chemical conditions in the water.  Chemical parameters include dissolved oxygen, phosphate, chloride, specific conductance, nitrate, turbidity, pH, and temperature. The HGMI is used by the NJ Department of Environmental Protection (NJDEP) and the US Environmental Protection Agency (USEPA) to determine if the site is meeting state and national water quality standards under the Clean Water Act. Click here to learn more about our stream monitoring program and water quality reports. In addition, we also monitor stream restoration and dam removal projects. In these studies, it is ideal to collect at least one year of pre-restoration data and at least three years of post-restoration data.


Site Data for SB28

Select a parameter below to view annual data. Hover over the chart to get more information.

Threats and Recommendations

This site is located just upstream of a major stream restoration that will take place by Urbani Fisheries Inc in 2020. This site allows us to monitor the quality of the water and habitat just above the restoration site as a control. This site allows us to be sure that any improvements in water quality within the restoration zone are not simply due to natural variation. The stream restoration that is taking place just downstream of this site is aimed at increasing fish and macro invertebrate habitat and decreasing stream temperatures.



Looking Downstream


Looking Upstream

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