1/12/2012 CONSERVATION COMMISSION Minutes

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Resource Area: Bordering Land Subject to Flooding, Buffer to Johns Pond Material submitted: site Flare 0 1103112 (Hand draven Duberger Builders/Proposed tai ing Wa Repair& Improvements 01103/12 Deburger Builders Don Dub rger fr m Dubarg r Builders is representing for the homeowners and a plai ns.that the existing condition of the structural integrity of the gall has been compr r i d. The issue is that on top of the gall exists a big concrete slab and if they remove the wall, the weight of the slab would cause the entire surface to collapse. Mr. Duberg r states that they would like t ,place four piers into the' icing wall, equally spaced across a 30' plane. A footing will then be placed in front of the wall with a field stone wall to face that wall. Mr. Duberger is aware that the Building Department requires an engineered stamp plan and he will be providing then one. Agent McManus states that the wall needs to be addressed as it is a safety hazard and the permit could be withheld until Mr. Dubergr can supply a stamped plan. [1 ,,03] /Motion nada, seconded and unanimously carried for a Negative Determination pending submittal of an engineer stamped plan 5) Ken Bates (Chairman Waterways Commission) Material submitted: Budget Figures 12116111 Mashpee Waterways Mr. Bates is present to explain to the Commission an article that will be published in the newspaper the following day regarding the Mashpee Fiver Dredging project and a specific site that he thought would be,beneficial to dispose of the dredged mate rial. M r. Bates suggests that there could also be some restoration to the firebreak road when the project is completed. Under this carne restoration project, they could possibly rake a handicap access with a possible picnic area and Barak launch area. This could be an Eagle Scout project. Chairman Fitzsimmons asks if dredging would have any toxic materials in it. Mr. Bates states that all of the test core samples have been tested by laboratories and show no hazardous materials. There is a high salinity count in the sediment but he assumes that is from the salt water. The Chairman mentions a-coli count and Mr. Date states that the 1916 channel in Popponesset Bay that was permitted and dredged in 2010 and the flushing that was created did not have any blossoms irn the Mashpee Diver this past summer and no fish kills. [1:21] 6) Brian Howes: cutin Cape Beach research plots (U-Mass Dartmouth) uth Material submitted: Power Point Presentation:Mashpee 2012 Accretion study(sae flash drive dated 711/1 0 Professor Brian Howes from the U n ive rsity of Massachusetts Dartmouth presented a powerpoint presentation to the commission that describes a PHD student's graduate work on the effects of sea level rise on salt marshes. A few research plots were created by the student on a parcel of salt marsh in Mashpee without notice to the commission. Professor Howes described the research in detail and assured the commission that all disturbances to the salt marsh will be mitigated entirely once the research is completed. Mr. Swe et encs how the r selected the particular spots and Professor Howes states that the true reason is that he's had a house in Mashpee since 1991 and he goes to the beach all the time so he has watched the dune material move back. The other reason is that they have already measured the rate at which that marsh is growing vertically. They have natural markers in the sediment that has been allowing documentation. The third reason is that it is on Nantucket Sound has a variety tide range of 4- '. Chairman Fitzsimmons asks how many sites they are planning on researching. Professor Howes states that these are the only ones for Mashpee. They had selected other sites such as Falmouth S i