4/8/2010 ENVIRONMENTAL OVERSIGHT COMMITTEE Minutes

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4Y roads. Mr. Storrs also discussed four point signalization that will be installed at Frank Hicks &Rt. 151, Donna& 28, Market& 151 and Steeple& 28. The lights will better manage traffic so that it does not approach the rotary at the same time. Selectman Myers was pleased with the improvements to the plan. Mr. Storrs noted that the final three pages represent each street by their"profile" such as on street parking, parking on one side, etc., which represent existing conditions in real historic and functional neighborhoods. Mr. Storrs emphasized the importance of differentiation of housing types and styles in the community, noting that the Mashpee comprehensive plan has called for mixed use and high density housing in the area. Mashpee Commons currently has only 40 apartments and they hope to offer single family housing in the new neighborhoods. Close proximity to Mashpee Commons would allow individuals access to work, shops, the library and public transit without the use of a car. Additionally, Mr. Storrs stated that the area could be better served by public water and tertiary wastewater treatment since the infrastructure is already in place with plans to expand it. Regarding stormwater, Mashpee Commons prefers the use of pervious surfaces and the Planning Board has recommended the use of rain gardens. The North Market and East Steeple Street development will manage their own water within their neighborhood, but East Steeple may also have an emergency overflow. The current wastewater plant has 80,000 gallons built approved capacity with a permit to expand it to 180,000 gallons. The tri-party development agreement process with Mashpee and Cape Cod Commission allows everyone to work together, at the same time, with the ability to work out various issues together on the master plan. Although Mashpee Commons will install the infrastructure and meet the permit requirements, the goal is to sell parcels to other parties to assist in the development in the community. Chairman Myers questioned the availability of green space. Space has not been made available for families with children to play in the community. Mr. Storrs does not envision many people with children living in the East Steeple Street neighborhood but felt that families would be interested in the Jones Whiting area located near the current commons and other open space. Mr. Storrs responded that open space is being provided in a priority habitat area, but not in the center of the community. Ms. Waygan suggested that there may be additional discussion about open space, particularly as it relates to Trout Pond. Mr. Storrs responded that the immediate area around Trout Pond will be protected with wetland setbacks but the balance of the 52 acre neighborhood has been zoned and taxed as commercial and will ultimately be developed. Ms. Waygan has requested a map of Mashpee Commons' proposed open space. Mr. Baker requested more details about stormwater. Santuit Pond Study Results-AECOM Don Kretchmer of AECOM introduced a PowerPoint presentation depicting the results of the study. Mr. Kretchmer described the pond as shallow with the greatest depth being 9-10 feet and the majority of the pond in the range of 5 feet or less. Mr. Kretchmer noted that more than half of the land around the pond continues to be forested, with low to mid density development in the area closest to the shoreline on both sides. Additionally, a small percentage of cranberry bogs are present as well as some wetland areas. Overall, the lake area covers 170 acres with a flushing rate of 3 times per year. Mr. Kretchmer noted that, with the flushing rate,there would be a total water exchange approximately every 120 days. 1t was determined that phosphorus was the critical nutrient fueling the growth of algae in the pond, often resulting in an algae bloom lasting the entire summer. Mr. Kretchmer shared images of a 1957 experiment at a Canadian lake where half of the lake had phosphorus added, resulting in increased 2