Relief shown by spot heights. "Community no. 421237A." "Initial identification date: January 24, 1975.." "Effective date: April 1, 1977." "Flood hazard boundary map H - 01-19." "Flood insurance rate map I - 01-19." "Panel 01E - elevation reference marks"--Index. "*Not printed--all area in zone C [panels 14, 15, 16, 17, 18, 19]"--Index. At head of title: Department of Housing and Urban Development.