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<br />KEY TO MAP <br /> <br />ELEVATION REFERENCE MARKS <br /> <br />SOO-Year Flood Boundary <br />1 aO-Year Flood Boundary <br /> <br />RM4 <br /> <br />7930.76 <br /> <br />DESCRIPTION OF LOCATION <br />U.S. Coast and Geodetic Survey disk, located 0.3 mile west along <br />State Highway 119 from State Highway 279 junction at Gregory <br />Gulch, 19 feet southeast of centerline, 7 feet southwest of promi- <br />nent vertical ridge, in the top of the southwest face of large sloping <br />rock, 2 feet higher than road. <br />U.S. Coast and Geodetic Survey disk located at Central City, on <br />road leading from State Highway 279 to State Highway 119; in the <br />southeast curb of concrete bridge over Eureka Creek (Gregory <br />Gulch Tributary) near the Black Hawk-Central City boundary. <br />U.S. Geological Survey disk located 34 feet east of the centerline <br />of State Highway 119 and Gregory Gulch State Highway 279 <br />junction, on a small ledge, 3.5 feet higher than road, <br />U.S. Geological Survey chiseled square located on northwest end <br />on concrete box culvert over Silver Creek on State Highway 119, <br />Silver Creek is the first draw entering from the north and just <br />downstream of the Black Hawk Treatment Plant. <br /> <br />FLOODWAY FRINGE <br /> <br /> <br />REFERENCE <br />MARK <br />RM1 <br /> <br />ELEVATION <br />(FT. NGVD) <br />8100.522 <br /> <br />lOa-Year Flood Boundary <br />SOO-Year Flood Boundary <br /> <br />RM2 <br /> <br />8241.749 <br /> <br />Approximate 100.Year <br />Flood Boundary <br /> <br /> <br />Cross Section Line <br /> <br />@------0 <br /> <br />/ <br /> <br />/ <br /> <br />/ <br />/ <br />/ <br /> <br />/ <br /> <br />/ <br /> <br />/ <br /> <br />/ <br /> <br />/ <br /> <br />/ <br /> <br />/ <br /> <br />/ <br /> <br />k <br /> <br />/ <br /> <br />/ <br /> <br />/ <br /> <br />/~........ <br />~~ <br />~~ <br />~........ <br />~........ <br />~........ <br />~........ <br /> <br />RM3 <br /> <br />8055.871 <br /> <br /> <br />River Mile <br /> <br />RM7X <br />· M1.5 <br /> <br />Elevation Reference Mark <br /> <br />NOTES TO USER <br /> <br />~~ <br />~~O~, <br />~/E: <br />~~ <br /> <br />~ <br /> <br />Boundaries of the floodways were com puted at cross sections <br />and interpolated between cross sections. The flood ways were <br />based on hydraulic considerations with regard to requirements <br />of the Federal Emergency Management Agency. <br /> <br />This map was prepared to facilitate flood plain management <br />activities only; it may not show all special flood hazard areas <br />in the community or all planimetric features outside of the flood <br />plain. Refer to the latest official Flood Insurance Rate Map for <br />any additional areas of special flood hazard. <br /> <br />Floodway widths in some areas may be too narrow to show to <br />scale. Refer to Floodway Data Table where floodway width is <br />shown at 1/20 inch. <br /> <br />STATE HIGHWAY 119 <br /> <br />........~ <br />~~ <br />~~ <br />........~ <br />........~ <br />~~ <br />........~ <br />~~ <br />....... <br /> <br />., <br /> <br />LIMIT OF <br />DETAILED STUDY <br /> <br />LIMIT OF <br />STUDY <br /> <br /> <br />I <br />/ <br />/ <br /> <br />) <br /> <br />/ <br />/ <br />/ <br />/ <br />(^/ <br />I <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />.. <br /> <br />Unnamed Tributary to <br />North Clear Creek <br /> <br />400 <br />I <br /> <br />APPROXIMATE SCALE <br />o <br />f-----l f-----l <br /> <br />400 FEET <br />I <br /> <br />~ <br />~ <br />:::: <br />Cj <br />e: <br />Cl <br />~ <br />c3 <br /> <br /> <br />I <br />_J <br /> <br /> <br />NA TIONAl FLOOD INSURANCE <br /> <br /> <br />~ <br />c- <br />~ <br />:::: <br />..t::) <br />~ <br />"t;$ <br />o:.l <br />t <br />'0 <br />..:. <br />..:. <br />';:J <br /> <br />LIMIT OF <br />STUDY <br /> <br /> <br /> <br />CITY OF <br />BLACK HAWK, <br />COLORADO <br />GILPIN COUNTY <br /> <br /> <br /> <br />ONLY PANEL PRINTED <br /> <br />CORPORATE LIMITS <br /> <br />COMMUNITY.P ANEL <br />080076 <br /> <br /> <br /> <br />o <br /> <br />BER 1 <br /> <br />1 <br /> <br />Federal Emergency Management Agency <br />