Action Plan for the Town of Chatham Ponds

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Appendix B. Summary of Pond Management Alternatives Category 1: Control Inputs Method How does it Work? Potential Benefits Potential Drawbacks Data gaps to make decision Costs (Relative) Permitting issues 1 2 3 Reduce phosphorus Reduce phosphorus from Reduce phosphorus from from on-site wastewater on-site wastewater on-site wastewater disposal disposal systems by disposal systems by systems by requiring centralized collection modifications to require frequent inspections and and disposal outside of alum additions to septic maintenance of systems watershed zone of tanks influence Collection system and Physical modification to Modification to local laws treatment/disposal Decreased loading of all wastewater contaminants, including pathogens Could increase development pressure Integrated with rest of wastewater decisions. Existing data do not define extent of problem High (likely to receive some public funds) Collection system will have environmental impact. Need to identify acceptable site for disposal to groundwater. Conservation Commission approval needed. wastewater systems Decreased loading of phosphorus More complex systems, more maintenance. More sludge Existing data do not define extent of problem Moderate (may receive public funds for demonstration) Dept. of Heath approvals, sludge disposal Conservation Commission approval needed. Decreased loading of all wastewater contaminants, including pathogens Public acceptance needs to be very high Existing data do not define extent of problem Low (borne by homeowners) Longevity High Moderate Moderate Ponds that might be appropriate for this alternative all Highest number of onsite systems are in Lovers, White, Stillwater, Emery Impaired ponds with >20 residences: Emery, Stillwater, Lovers. Non-impaired ponds, at least 15 residences: White, Schoolhouse. Consider Trout and Pickerel, based on water quality Dept. of Health approvals Conservation Commission approval needed. EcoLogic LLC and 21 November 20, 2003 Rev. 3 Stearns & Wheler LLC
Category 1 (continued): Control Inputs Method How does it Work? 4 5 6 Water quality inlets to Public education and stormwater infiltration outreach basins Stormwater collection and treatment prior to groundwater discharge Educate public on importance of landscaping, erosion controls, beach sanitation Potential Benefits Reduced loading Reduced loading. Increase public awareness of ponds and their vulnerability Potential Drawbacks Data gaps to make decision Most systems designed to capture sediment. Higher maintenance No estimate of the contribution of soluble P from stormwater None None Discourage gulls by using scare techniques Reduces nutrient deposition from birds Reduced loading of nutrients and bacteria Disruptive Costs (Relative) Low Low Low Permitting issues Requires siting, Conservation Commission approval needed. None Longevity Moderate Moderate (prevention of incremental source likely to be a small source) Ponds that might be appropriate for this alternative All, especially those with developed watersheds, Trout and Pickerel have evidence of sediment deposition from runoff All Estimate maximum number of gulls, use research reported in Portnoy (1990) Needs approvals from Fish and Wildlife, MADEP. Conservation Commission approval needed. Likely to be effective only while active measures are taken, although birds may move to other areas White EcoLogic LLC and 22 November 20, 2003 Rev. 3 Stearns & Wheler LLC
Page 1 and 2: Action Plan for the Town of Chatham
Page 3 and 4: List of Tables Page Table 1. Data S
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: Appendix A. Summary of Regulatory S
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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