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including those that flowed north and south. He pointed out the peaks on the site. He also <br />referred to the two planned detention ponds. The information submitted by the developer indicates <br />that one of the ponds is a "wet" pond, meaning that it is expected to hold water all of the time, the <br />other pond could be a "dry" pond. A portion of the drainage area is characterized as a flood plain <br />area consisting of flat, poorly drained soil. In response to a question, he stated that it is possible to <br />build on that type of soil without a great deal of problem. There would not be structural problems <br />but where there are flat slopes the water does not drain well. The water stays on lawns and is not <br />good for them. When it rains, the water tends to drain slowly. <br />QUESTIONS AND/OR COMMENTS FROM THE PLANNING BOARD: <br />Planning Board member Katz stated that the builder has proposed "clear cutting" for ease of <br />construction. There is the possibility that there would be significant earth movement in this event. <br />He asked how that might affect the drainage, or if in fact, at the time they were doing construction <br />they could make some remedies to address potential drainage issues. <br />Mr. Thames stated that it was possible that they could make some remedies. He mentioned <br />that the information he has seen does not show the proposed grading plan. Essentially the elevation <br />of the outlet creeks set the limits. He said that you cannot steepen the grades to such an extent to <br />get good drainage in the upper areas because by the time you get to the lower areas there would <br />not be enough grade to work with. <br />Mr. Katz stated that when you have an area with trees, at least during the warmer months, you <br />have some moisture loss due to the trees. When there are heavy vehicles in an area that has clay <br />soil, the texture of that soil is affected as well as the drainage potential of that soil. <br />Mr. Thames agreed with that statement. <br />Mr. Katz asked Mr. Thames if the plan to "clear cut" to make the construction easier would have <br />any impact, harmful or helpful, on the drainage of that area. <br />Mr. Thames stated that it is certainly possible that it will impact the imperviousness of the soil. <br />Clay soils typically, in their natural state, allow surface water to percolate down through them. Once <br />the soil is disturbed it becomes plastic and less permeable to water. <br />Chair Brown had questions about the sewer connections. Part of the developer's statement is <br />that the Town of Hillsborough was willing to extend water and sewer because the nearby mobile <br />home park has had problems with septic systems. She asked about the issue of how that mobile <br />home park would be able to connect to the water and sewer system of this development and what <br />needs to be done to assure that happens. <br />Mr. Thames indicated that the sewer line does not show on the map. He pointed out the pump <br />station which would receive all of the drainage from the entire Lawrence Road project. From there, <br />a force main would pump the drainage to the top of the hill, where, apparently it would flow back <br />down toward Meadowlands by gravity feed. The mobile home park in question is in this area. The <br />Q:\19981123.doc®