09/21/1989 CONSERVATION COMMISSION Minutes

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Conservation commission September 21 , 1989 Page 4. Concerning the Hydro-lift, Mr. Depietri stated it is no different than a Catamaran sailboat, he can take it out and away tomorrow, Mr. Sherman stated it cuts off light in places, as a float would, and in his opinion merits a filing, The Shellfish Warden,, upon viewing the area, was 6f the opinion dredging was done in that area. Mr, Depietri stated it was not dredged. Mr. Sherman advised Mr. Somerville stated that the compressed air from such devices could cause the alteration to the bottom, Chris Riel of I.E,P. advised this situation i s treated like a float would be and an addition concern in the notice of intent is the potential need for a Section to ACOE permit and also chapter 91 license because it is below Mean Low Water. He suggested they look into this. . Depietri stated the reason they purchased it is because they saw one in New Seabury and have since seen another. Ms Behrman suggested the Agent go down when the unit is in operation to observe the situation first hand. Mr. Depietri agreed. She felt it does core under the act and a filing should be considered. 8:45 Daniel 's Island Imp ment Association for the proposed reconstruction and maintenance of an existing bituminous concrete road, the installation of a water main and the construction of drainage structures on Daniel 's Island Road. Michael Mc Grath of Holmes & McGrath presented abutter receipts. Ms Behrman asked if this project has been reviewed with the Planning Board, Mr. McGrath was not aware of any necessity. Daniel 's Island Road is existing, only 251 wide, and in very poor condition. It will be destroyed when the new water main is put in. Ms Behrman expressed concern with drainage structures proposed. As the commission does not have the services of a. consultant engineer, she felt it would be wise to refer this plan to the Planning Board for their Engineer to review. She was concerned with drainage going into the wetlands. Mr, McGrath stated the work being proposed is immediately adjacent to the salt marsh. There is very few feet between the pavement and edge of salt marsh. Work is being done in the buffer zone, land subject to flooding,, there are five different flood zones they are going to be performing construction i n. They will be doing work within the buffer zone of a coastal bank. There is a one-car width paved roadway scarred by potholes. There is no method they could find to direct the run-off other than into the salt marsh. Nis Behrman asked if they planned any mitigating measures to compensate for the impact from that run-off into the estuarine area? Mr, McGrath stated the existing roadway drains into that area. She added it is not a sealed surface at this point. She further asked if consideration was given to changing the slope of the road? d' 0 Mr. McGrath stated they are going to flood the road until it reaches the highest edge .of the pavement and/or the shoulder.