With the arrival of spring, the two-year, $150,000 Wentworth/Crescent watershed management plan is now winding down, and its accomplishments are significant. Among them:
- A door-to-door survey of hundreds of properties along the shoreline of the two lakes and their tributaries, resulting in a raft of information about the age, placement, and maintenance of near-water septic systems
- Identification, as part of the survey, of more than 100 properties of various sizes where runoff from snowmelt and rain storms is eroding shorelines and roadway stream crossings and is likely delivering large amounts of phosphorus into our surface waters. That list has been prioritized so that sites whose repair would provide the greatest return for the cost could be placed first in line for funding in the future.
- Creation of a “build-out analysis” that estimates the extent of the development that could take place in the watershed under current zoning regulations. Using growth trends and other factors, the analysis estimated that all available property could be developed in Wolfeboro by 2033.
- Creation of a mathematical land-use model that has estimated the current and projected amount of phosphorus being delivered to the lakes from all properties in the watershed. The model identified Lake Wentworth as the source of 96% of the water load and 68% of the total phosphorus entering Crescent Lake, and it ranked the 14 tributaries that flow into Wentworth by the amount of phosphorus they deliver.
- Working from the data produced by the lake model, the Steering Committee that oversaw the watershed management plan set a goal of reducing the existing phosphorus levels in Lake Wentworth and Crescent Lake by 15% in the coming years.
The details of the Wentworth/Crescent watershed management plan are contained in a final 190-page report. That document, which details the findings and recommendations of the two-year project, is available from this site in two parts:
- “Wentworth/Crescent Watershed Management Plan” summarizes the findings of the watershed management project and provides data and guidance for next steps in protecting the surface waters of the watershed.
- “Appendices: Wentworth/Crescent Watershed Management Plan” provides technical data supporting the watershed management plan. NOTE: This file is 38 MB in size and may take significant time to download.