Action Plan for the Town of Chatham Ponds

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Table of Contents 1. Introduction and Scope................................................................................................1 2. Nutrients and Eutrophication......................................................................................1 3. Managing Eutrophication............................................................................................3 4. Kettle Pond Ecosystems ...............................................................................................4 5. Sources of Data and Information.................................................................................5 5.1. Current Water Quality Conditions............................................................................5 5.2. Pollutants of Concern..............................................................................................6 5.3. Target Concentrations .............................................................................................6 5.4. Acceptable Loads to Meet Targets...........................................................................8 5.5. Point and nonpoint sources of nutrients ....................................................................8 5.6. Transport and attenuation from source to ponds ........................................................9 5.7. Strategy to meet targets.........................................................................................10 6. Inventory of Chatham Ponds .....................................................................................10 7. Summary of Findings.................................................................................................14 8. Recommendations......................................................................................................16 8.1. Public Education ..................................................................................................16 8.2. Land acquisition ...................................................................................................16 8.3. Bioengineering .....................................................................................................16 8.4. Structural.............................................................................................................16 8.5. Inspection and Monitoring.....................................................................................16 8.6. In-lake Measures ..................................................................................................17 9. Priority Actions for the Town of Chatham.................................................................18 10. References..................................................................................................................19 Appendix A. Summary of Regulatory Setbacks and Recommendations for Septic Systems in ..... Coastal Areas...................................................................................................20 Appendix B. Summary of Pond Management Alternatives......................................................21 Appendix C. Recommended Water Quality Monitoring Program............................................27
List of Tables Page Table 1. Data Sources Used to Develop Chatham Ponds Action Plan ............................... 5 Table 2. Trophic State and Indicator Parameters............................................................. 7 Table 3. Ecoregional Criteria ........................................................................................ 7 Table 4. Status of Chatham Ponds, based on Ecoregional Criteria .................................... 8 Table 5. Summary of Physical Characteristics: Chatham Ponds ..................................... 10 Table 6. Potential for Sediment Phosphorus to Enter Photic Zone during Summer .......... 12 Table 7. Summary of Trophic State Parameters, Chatham Ponds ................................... 13 Table 8. Summary of Current Water Quality Conditions and Use Attainment ................. 13 Table 9. Nitrogen: Phosphorus Ratios, Chatham Freshwater Ponds ................................ 15 Table 10. Summary of Major Findings and Recommendations for Chatham Ponds ........... 17 List of Figures Page Figure 1. Freshwater Ponds, Town of Chatham, MA. ....................................................... 2 Figure 2. Algal bloom in Perch Pond (left) and clear waters of White Pond (right) ............. 3 Figure 3. Aerial photograph of Goose Pond illustrating hydrologic isolation of kettle ponds..................................................................................................... 4 Figure 4. Maximum Depth and Extent of Anoxia ........................................................... 11
Page 1: Action Plan for the Town of Chatham
Page 5 and 6: FOX POND HARWICH STILLWATER POND MI
Page 7 and 8: techniques on controlling the conce
Page 9 and 10: Pond Historical Data (pre 1990) Ple
Page 11 and 12: Table 4 Status of Chatham Ponds, ba
Page 13 and 14: the Barnstable County Department of
Page 15 and 16: period (Osgood 1988). Ponds with ve
Page 17 and 18: 7. Summary of Findings Finding: Wat
Page 19 and 20: • Permanent drawdown to accelerat
Page 21 and 22: 9. Priority Actions for the Town of
Page 23 and 24: Appendix A. Summary of Regulatory S
Page 25 and 26: Category 1 (continued): Control Inp
Page 27 and 28: Category 2 (continued): Alter Inter
Page 29 and 30: Category 3 (continued): Mitigate th

Action Plan for the Town of Chatham Ponds

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