Beisler Lake Dam

Beisler Lake Dam Removal and Restoration of Spruce Run Creek

The Beisler Lake dam impeded native brook trout passage to their upstream headwaters habitat and acted to warm the river water as it flowed over the top of the spillway in hot summer months. The Equity team provided the survey, design, permitting, and construction.

The project included:

  • the removal of a high hazard classified dam;
  • restoration of the 7 acres of former lake bed;
  • creation of native brook trout habitat in-stream; and
  • building vernal and year round wetlands in the footprint of the former lake impoundment.

This project was located in Lebanon, New Jersey is part of the Spruce Run Creek, a critical drinking water supply for more than 3 million New Jersey residents.

This project tasks included lake lowering, fish capture and transfer, stream restoration design, bank stabilization, dam removal, Threatened & Endangered habitat enhancement for wood and box turtles, nesting boxes for barred owl and wood ducks, bat boxes, and riparian plantings of 7 acres in the former lake impoundment.

This was a high hazard classification dam, and infrastructure including homes and bridges were built downstream after this dam was constructed in 1973. The former infrastructure would not tolerate increased flows in rain events. Our team had to engineering and design a way to retain water in the impoundment while at the same time removing the high hazard dam. Dozens of hydraulic models were analyzed to determine the best design for the dam removal and scheduling the construction phase.

The Equity team was able to get the complete set of permits for this project during the height of the pandemic to keep the project on schedule.

Project Components

  • Surveying
  • Stream Restoration Design
  • Bank Stabilization
  • Hydraulic Modeling
  • Permitting
  • Construction Oversight
  • Dam Removal
  • Threatened and Endangered Species
  • Habitat Enhancements
  • Wetlands


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