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<br />Genenl <br /> <br />ROCK RAPIDS, IOWA <br />Review Sheet <br /> <br />4184-RRP-415-1 <br />Sept. 5, 1995 <br /> <br />SITES <br /> <br />Site A: Proposed levee on West side of Fairgrounds <br /> <br />Site B: Existing levee constructed on North side of town crossing Boone Street. <br /> <br />Site C: Existing private ring levee around Stewart residence on West side of East Street. <br /> <br />MAPPING <br /> <br />Four sets of mllps used <br /> <br />1. TopoWlijlhic M!ij) of Rock Rapids_ Iowa (hereout called Topo map) <br />- Contour interval: 5 feet <br />- Scale: I" = 400' <br />- Datum: none listed or could be obtain through verbal confirmation <br />- Map Date: May 1971 <br />- Contours revised in 1971 <br />- Spot elevation taken along with photogammetric techniques <br />- Aerials taken by Great Plains Aerial Surveys, Inc., on July 19, 1965. <br /> <br />2. Flood Insurance Study Work Mlijl (hereout called FIS map) <br />- Contours interval: 10 feet <br />- Scale: 1" = 500' <br />- Datum: none listed (1971 USGS quad used 1927 North American datwn) <br />- Map Date: September 1989 <br />- Flood (I00-yr and 500-yr) and floodway boundaries plotted on map <br />- Water surface elevations plotted at 2 foot intervals <br />- cross sections plotted on 1971 USGS quad <br />- City Surveyed cross sections for FIS (page 1, section 4.0, FIS report) <br />- Verbal confirmation from DGR that cross sections tied to mean sea level <br /> <br />3. Flood Insurance Rate MlW (hereout called FIRM map) <br />- Contour interval: No contours <br />- Scale: 1" = 500' <br />- Datum: National Geodetic Datum of 1929 <br />- Map date: revised on May 2, 1991 <br />- Flood (lOO-yr and 500-yr) and tloodway boundaries plotted on map <br />- Water surface elevations plotted at 1 foot intervals <br />- Cross sections plotted (extended sections) <br /> <br />General - page 1 <br />