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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Physical Daily Values, Unit Values 2024-03-26 2024-11-21
n/a USGS Annual Water Data Reports Site 2024-01-01 2024-01-01
Water Data for the Nation inventory

Monitoring location 01661499 is associated with a Lake, Reservoir, Impoundment in St. Mary's County, Maryland. Current conditions of Gage height and Precipitation are available. Water data back to 2024 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
01661499 n/a
Site name
ST MARYS LAKE NEAR CALLAWAY, MD n/a
Site type
Lake, Reservoir, Impoundment
LK
DMS latitude 381510.0 n/a
DMS longitude 0763200.5 n/a
Decimal latitude 38.25277778 n/a
Decimal longitude -76.5334722 n/a
Latitude-longitude method
Interpolated from Digital MAP. N
Latitude-longitude accuracy
Accurate to + or - .1 sec (Differentially-Corrected GPS). 1
Latitude-longitude datum
North American Datum of 1983 NAD83
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
Maryland 24
State
Maryland 24
County
St. Mary's County 037
Country US n/a
Land net location description n/a
Name of location map HOLLYWOOD, MD n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 2.07 feet n/a
Method altitude determined Interpolated from Digital Elevation Model N
Altitude accuracy 1.6 feet n/a
Altitude datum
North American Vertical Datum of 1988 NAVD88
Subbasin hydrologic unit
Lower Potomac 02070011
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site YNNNYNNNNNNNNYNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
8.72 square miles n/a
Contributing drainage area n/a
Time Zone abbreviation EST n/a
Site honors Daylight Saving Time
Y n/a
Data reliability
n/a
Data-other GW files n/a
National aquifer n/a
Local aquifer n/a
Local aquifer type
n/a
Well depth n/a
Hole depth
n/a
Source of depth data n/a
Project number n/a