12/14/1989 CONSERVATION COMMISSION Minutes

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CHARLES L. RO LEY & ASSOCIATES diad &6&=u and e&wLyou 2229 CRANBERRY HIGHWAY WE STI A Ft E H A M,-MASSAC HUSETTS 02 576 TELEPHONE 295-0545 December 14, 1989 Town of Mashpee Conservation Comission PO Box 1108 Mashpee, MA 02649 Re: Sarakumett Lots 80, 81 Attention: Robert Sherman, Conservation Agent Dear Mr. Sherman I have reviewed the submittal by Arrow Engineering, Inc. relative to the determination of the 100 year flood elevation for lots 80 and 81., Noisy Hole Road. The materials reviewed which you supplied to me includes 1. Print of a portion of a subdivision plan which shows lot configuration and topography as far as the outside property boundaries at a two Boot contour interval. 10 plan title or date is shown. 2. Drainage computations consisting of three sheets by Arrow Engineering, Inc. dated 1111/89. I have also reviewed 310 CMR 10.57 of the Wetlands Act and have reviewed the USGS topographic quadrangle which covers the area in question. Chapter 131, §40 Reference The drainage computations make reference to .310 SMR 10.57 o the Wetlands Act. This section deals with Land Subject to Flood- ing (both bordering and isolated areas) . That section, in part, requires that the 100 year flood be determined as follows: 1. First, by "reference to the most recently available flood profile data prepared for the community within which the work is proposed under the National Flood Insurance Program FFP . . .tf.. 2. Second, "where 'IP profile data is unavailable, the boun- dary of the Bordering Lard Subject to Flooding shall be the maximum lateral extent of flood water which has been observed orrecorded. . .". 3. Thirdly, where there is conflict in the latter, compu- tations shall be done by a professional engineer or other compet nt professional to determine the boundary based on