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Mr. Daly asked if these marshes are close to conscrvation land,would that become a conservation issue. <br /> ir. Rosenberg answered not unless you intend to do anything on conservation.land. The State agencies <br /> having to deal with conservation land would not be involved either. You would have the army Corp, of <br /> Engineers,but that would be completely separate from the State environmental agencies. <br /> One of the Conservation Commissioncrs asked what would it be in two years from now when we would <br /> have to do it over again. Mr.Hanks said that was incorrect information. we postulated inn be five years <br /> to do it over again. One could also argue that the Mashpee liver has never been dredged. we could do it <br /> once, leave everything alone and then ten years down the road if it becomes necessary again,maybe there <br /> will be some different technology. That is another school of thought. That is not necessarily the way we <br /> are going,but we are not doing it again in two years. <br /> Mr. Rosenberg said you would have to dig a hole three acres in area,five feet deep. He wanted to know <br /> what happens to that material that you have excavated, <br /> Mr. Hanks went into the details of the three upland sites and the ideas associated with them. If you have <br /> clean sand,you would wend up with up to 30,000 cubic yards of excess material. lfyou are dealing with <br /> clean sand,you can sell it or use it for beach nourisl ent. You can use it to berm up around the crater <br /> you are making so that you don't have to dig all that out, fn the end,you need to cover that muck with <br /> sand before you put the topsoil down. <br /> Mr. wallenhaupt asked if you have to bean it and you are letting the water run through it,aren't'you <br /> affecting the soil. <br /> Mr.Hanks went back to explaining the details to answer the question. The bulk of the salt would be going <br /> back to the river so it would not be a problem. It may require an impermeable lining to keep it froln <br /> seeping into the groundwater. If the environment is okay to let brackish water go into the ground then <br /> that would be a lot simpler. Once the material sits there, the rain will rinse it and over time it is going to <br /> leach the salt out. <br /> Mr. Worsen asked where it would be rinsed. Mr. Hanks said we would have to drain the pond.. The smart <br /> thing would be to drain it right back into the river, <br /> Mr. Rosenberg said you would have a pond with material on top of it. If you drain the pond,you would <br /> have to dig out all of the silt that you put in there in order to get the merxzb�rane out. So draining the pond <br /> would not allow you to get the membrane out. Mr. Hanks said if you are building a pond habitat}you <br /> nerd thenembrane any way. Mr. Rosenberg said it would be a stagnant pond because you have no <br /> drainage. Mr. Danks said you would need to speak to the habitat cxperts about that. <br /> Mr. Rosenberg said that he thou part of this was just argur�entative because at so�nc point they would <br /> be asked to make a decision and all of the issues will come up, Mr. Hanks said that the decision time <br /> would coxae when you are dealing with an order of conditions and plans, we are far from that. Mr. <br /> Lumsden said that we are here looking for guidance. We have done a lot of preliminary work. we <br /> haven't done it all. we arc looking for help right now. <br /> Mr. Daly said during preliminary discussions with the engineering firm,they said a pond habitat is <br /> feasible. They did not do an engineering study. All they did was cone in and look at sites. Sooner or <br /> later we are going to pay ars engineering firm to work out details. Right now we are trying to focus to <br /> keep our costs down. That is what we want help with from the Conservation Commission. we want to <br /> focus it down to a few possibilities. <br /> Mr. Sherman thought it was important to interject the processes you will have to go through will depend <br /> on where you put the material. <br /> 4 <br />