05/17/2006 PLANNING BOARD Minutes

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� r allows water to flow through the dyke to the cranberry bog and eventually to the Mashpee River. The parking lot on the westerly side of the Mashpee River where all of the parking lot runoff accumulates. An area has been constructed in stone that acts as a filter. There is a small area where sediment from the parking lot has built up. There is an area beside the walkway that collects water and spills over behind the walkway. Theme is a retaining wall in this area and the soil between it and the walkway is washing away and should be addressed. uinauisset Avenesantuit River area, on the Barnstable side shows the effects of the super elevation in the road surface . The water runs across the road and alone the edge of the berm. The area just before the ridge on the Mashpee side shows how flat the area is and also shows the low shoulder. Runoff flows along this entire area to the low point at the bridge. The Barnstable side of the bride at the santuit River shows uncontrolled runoff along the bridge, and between the guardrail posts . Water travels across the road and is nowhere near the catch basin . However, the- basin is full of sediment. The Town of Barnstable and Mass Highway have constructed an infiltration system connected to the basin, however Mr. Rowley is uncertain as to how well it is working. The Mashpee side of the santuit River shows that one of the manholes is located over are outlet pipe that runs out to the edge of the marsh, an overflow outlet. There is no evidence of erosion or sediment carryover. Indication was made to the corrugated metal pipe where there is some erosion. Mitigation would be difficult i-n this area as the road is extremely flat and not the much higher than the water level. The intersection of Route 130 and Route 28 in Barnstable shows a manhole that collects water from the 5