POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA
View all current conditions values on the classic Water Data for the Nation interface.
Monitoring location 01646500 is associated with a STREAM in MONTGOMERY COUNTY, MARYLAND. Current conditions of DISCHARGE, DISSOLVED OXYGEN, GAGE HEIGHT, and MORE are available. Water data back to 1930 are available online.
Provisional Data Statement
Data are provisional and subject to revision until they have been thoroughly reviewed and received final approval. Current condition data relayed by satellite or other telemetry are automatically screened to not display improbable values until they can be verified. Provisional data may be inaccurate due to instrument malfunctions or physical changes at the measurement site. Subsequent review based on field inspections and measurements may result in significant revisions to the data. Data users are cautioned to consider carefully the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Information concerning the accuracy and appropriate uses of these data or concerning other hydrologic data may be obtained from the USGS.
USGS Parameter Group Data Types Start Date End Date Information Water-quality 1980-09-17 2015-11-04 Inorganics, Major, Metals Water-quality 1965-08-09 1983-02-09 Inorganics, Major, Non-metals Daily Values, Unit Values, Water-quality 1965-08-09 2019-04-18 Microbiological Water-quality 1969-07-16 1983-04-20 Nutrient Daily Values, Unit Values, Water-quality 1965-08-09 2019-04-18 Organics, PCBs Water-quality 1980-09-17 1980-09-17 Organics, other Water-quality 1980-09-17 2015-10-07 Organics, pesticide Water-quality 1980-09-17 1983-04-20 Physical Daily Values, Unit Values, Water-quality 1930-03-01 2019-04-18 Sediment Water-quality 1975-09-27 2015-10-07 n/a Peak Measurements 1931-04-03 2017-05-07 n/a Site Visits 1930-03-25 2018-12-17 n/a USGS Annual Water Data Reports Site 2006-01-01 2018-01-01
Metadata Element Location Metadata Metadata Code Agency
The agency that is reporting the data.
U.S. Geological Survey USGS Site identification number
Each site in the USGS data base has a unique 8- to 15-digit identification number.
01646500 n/a Site name
This is the official name of the site in the database. For well information this can be a district-assigned local number.
POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA n/a Site type
A list of primary and secondary site types that can be associated with data collection sites. A site type is a generalized location in the hydrologic cycle, or a man-made feature thought to affect the hydrologic conditions measured at a site. All sites are associated with a primary site type, and may additionally be associated with a secondary site type that further describes the location. The exception to this rule is the Facility primary site type, which must always be associated with a secondary site type. The site type code incorporates these hierarchial distinctions.
"A body of running water moving under gravity flow in a defined channel. The channel may be entirely natural, or altered by engineering practices through straightening, dredging, and (or) lining. An entirely artificial channel should be qualified with the ""canal"" or ""ditch"" secondary site type."
ST DMS latitude 385659.2 n/a DMS longitude 0770739.5 n/a Decimal latitude 38.94977778 n/a Decimal longitude -77.12763889 n/a Latitude-longitude method
Indicates the method used to determine latitude longitude values.
Mapping grade GPS unit (handheld accuracy range 12 to 40 ft) G Latitude-longitude accuracy
Indicates the accuracy of the latitude longitude values.
Accurate to + or - 1 sec. S Latitude-longitude datum
Latitude/longitude (horizontal) coordinate datum.
North American Datum of 1983 NAD83 Decimal Latitude-longitude datum North American Datum of 1983 NAD83 District
The Water Science Centers (WSCs) across the United States use the FIPS state code as the district code. In some case, sites and samples may be managed by a water science center that is adjacent to the state in which the site actually resides.
Maryland 24 State
The name of the state or territory in which the site is located.
Maryland 24 County
The name of the county or county equivalent (parish, borough, etc.) in which the site is located.
Montgomery County 031 Country US n/a Land net location description n/a Name of location map FALLS CHURCH, VA n/a Scale of location map 24000 n/a Altitude of Gage/land surface 37.20 n/a Method altitude determined Interpolated from Digital Elevation Model N Altitude accuracy .1 n/a Altitude datum
Altitude of the site referenced to the specified Vertical Datum.
North American Vertical Datum of 1988 NAVD88 Subbasin hydrologic unit
Hydrologic units are geographic areas representing part or all of a surface drainage basin or distinct hydrologic feature and are delineated on the State Hydrologic Unit Maps.
Middle Potomac-Catoctin 02070008 Drainage basin
The Basin Code or "drainage basin code" is a two-digit code that further subdivides the 8-digit hydrologic-unit code.
n/a Topographic setting
Refers to the geomorphic features in the vicinity of the site.
n/a Flags for instruments at site YNNNYNYNNYNNNNNNNNNNNNNNNNNNNN n/a Date of first construction
Date the well was completed
n/a Date site established or inventoried n/a Drainage area
The area enclosed by a topographic divide from which direct surface runoff from precipitation normally drains by gravity into the stream above that point.
11560 n/a Contributing drainage area n/a Time Zone abbreviation EST n/a Site honors Daylight Savings Time
Y for yes or an N for no to indicate whether the site is in an area that switches to Local Standard Time (Daylight Savings Time) for a part of the year.
Y n/a Data reliability
Data reliability code is mandatory for spring, groundwater, and aggregate groundwater sites.
n/a Data-other GW files NNNNNNNN n/a National aquifer n/a Local aquifer n/a Local aquifer type
Describes the type of aquifer(s) encountered by a site type of well (groundwater).
n/a Well depth n/a Hole depth
The total depth to which the hole is drilled, in feet below land surface datum.
n/a Source of depth data n/a Project number 442400100 n/a
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