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KEY TO MAP SOO-Year Flood B9undary~~.~ 1 OO.Y ear Flood Boundary-'~- 100-Year Flood Boundaty~~ Zone Designations* With Date of Identification e.g., 12/2/74 500- Year Flood Boundary~.~. Base Flood Elevation Line With Elevation In Feet** 513------ Base Flood Elevatioh in Feet Where Uniform Within Zone** (EL 987) River Mile RM7X M1.5 Elevation Reference Mark **Referenced to the National Geodetic Vertical Datum of 1929 *EXPLANA TJON OF ZON E DESIGNATIONS ZONE A EXPLANA TION o B Areas of 100-year flood; base flood elevations and flood hazard factors not determined. Areas of 100-year shallow flooding where depths are between one ('I) and three (3) feet; depths of inundation are shown, but no flood factors are determined. of 100-year shallow flooding where depths are one (1) and three (3) feet; base flood elevations are shown, but no flood hazard factors are determined. Areas of 100-year flood; base flood elevations and flood hazard factors determined. Areas of 100-year flood to be protected by flood under construction; base flood flood hazard factors not determined. Areas between limits of the I OO-year flood and 500- year flood; or certain areas subject to 1 OO-year flood- ing with depths less than one (1) foot or where the drainage area is less than one mile; or areas protected by levees from the base (Medium shading) Areas of minimal flooding, (No shading) Areas of undetermined, but possible, flood hazards. 100-year coastal flood with base flood elevations and flood not determined. Areas of 100-year coastal flood with action) base flood elevations and flood / '" ~ '" {', I AO AH A 1-A30 / c A99 C D V / V1-V30 '" / '" / NOTES TO USER Certain areas not in the special 'flood hazard areas (zones A and V) may be protected by flood control structures. This map is for flood insurance purposes only; it does not neces- sarily show all areas subject to flooding in the community or all planimetric features outside special flood hazard areas. / /; '~ '" INITIAL IDENTIFICATION JUNE 14, 1974 CONVERSION TO REGULAR PROGRAM SEPTEMBE R ,1978 / / Refer to the CONVERSION TO REGULAR PROGRAM date shown on this map to determine when actuarial rates apply structures in the zones where elevations or depths have been established. To determine if flood insurance is available in this community, contact your insurance agent, or call the National Flood Insurance Program, at (800) 638-6620, or (800) 424-8872. APPROXIMATE SCALE 400 ELEVATION REFERENCE II REFERENCE MARK RM2* ELEVATION (FT. NGVD) 9598.0 DESCRIPTION OF LOCATION RM3 9305.447 Standard tablet, stamped V.T.-1952 V ABM 9598, 1 mile south- southwest of the Town of Silverton, 205 feet east of U.S. Highway 550, on highest point of a small knoll. Established by U.S. Geologi- cal Survey Aluminum tablet, stamped 9302 OUR, southeast corner of Grand Hotel Block, 2.5 feet above sidewalk, at northwest corner of Greene and 12th Streets. Established by U.S. Geological Survey *OUTSIDE CORPORATE LIMITS FEDERAL INSURANCE ADMINISTRATION