NAVD88

Acronym	Definition
NAVD88	North American Vertical Datum of 1988

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(29) The station datum using NAVD88 is based on surveys representative

The Coastal Property Boundary in California: Recommendations to Improve Determination of the Mean High Tide Line in Light of Sea-Level Rise

The NAVD88 vertical datum is a geodetic mean sea level datum and the standard vertical datum used for surveying and engineering in the continental United States.

CHARACTERIZATION OF RIBBED MUSSEL GEUKENSIA DEMISSA (DILLWYN, 1817) HABITAT IN RELATION TO TIDAL ELEVATION AND SALINITY IN A SOUTH CAROLINA ESTUARY

Early Cost Estimates for FMMI ($ millions) FMMI Component May 1999 August 1999 FEMA-funded flood data updates 748 385 Digital conversion and map maintenance 56 191 Unmapped communities 132 118 Ongoing activities 234 344 Map and customer services initiatives 23 -- Conversion to metric and NAVD88 42 62 Contracted administrative staff -- 13 Total mapping costs $1,235 $1,114 Expected income from existing fees $364 $364 Incremental appropriations needed for FMMI $871 $750 Source: Modernizing FEMA's Flood Hazard Mapping Program, May 2001, estimating total mapping costs and incremental appropriations needed for FY2003 through FY2007.

FEMA's flood hazard map modernization initiative

The range of elevations measured in the study plots was [less than] 1 m (0.384-1.339 m NAVD88); median plot elevations ranged from 0.522 m to 1.100 m NAVD88.