Latitude: 38.983056° N,
Longitude: 76.480000° W,
Horizontal Datum:
NAD83
River Stage
Reference Frame |
Gauge Height |
Flood Stage |
Uses |
| NWS stage |
0 ft |
2.6 ft |
Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps |
| Vertical Datum |
Elevation
(gauge height = 0) |
Elevation
(gauge height = flood stage) |
Elevation information source |
| NAVD88 |
-0.77 |
1.63 |
Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps |
| NGVD 29 |
0.06 |
2.46 |
Older USGS topographic maps, NGVD29 benchmarks |
| MSL |
-0.72 |
1.68 |
Older USGS topographic maps, MSL benchmarks |
| Other |
Not Available |
Not Available |
|
|