Click
to
hide
Water-Year
Summary
instructions
and
information
- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
370504116404903 ER-OV-06a2
Southern Nevada volcanic-rock aquifers
Volcanic Rocks
Volcanic Rocks
LOCATION - Lat 37°05'03.56", long 116°40'52.76" referenced to North American Datum of 1983, in NE 1/4 SE 1/4 NE 1/4 sec.11, T.10 S., R.47 E., Nye County, NV, Hydrologic Unit 18090202,
REVISIONS HISTORY - Revisions: Groundwater levels above NGVD 1929 and NAVD 1988 from June 27, 2024, at 20:00 UTC to October 2, 2024, at 18:00 UTC were revised on October 30, 2024, because land-surface datum was resurveyed. The previous land-surface datum of 4,007.04 ft above NGVD 1929 was used from October 27, 1997, to June 23, 2024. The current/updated land-surface datum of 4,010.20 ft above NAVD 1988 is applied from June 24, 2024, to the present.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 65 ft. Upper casing diameter 2.5 in; top of first opening 44 ft, bottom of last opening 65 ft.
DATUM - Land-surface datum is 4,010.2 ft above North American Vertical Datum of 1988. Measuring point: Red mark on top of pvc casing, 2.2 ft above land-surface datum, Oct. 2, 1997 to present. The NAVD of 1988 datum was determined by a level
2 GNSS survey (Reference Frame NAD_83 (2011) (EPOCH:2010.0000), GEOID18) by
USGS on June 24, 2024, and tied to file mark on the well casing. Prior to June
24, 2024, the land-surface datum was 4,007.04 ft above NGVD of 1929 as
determined via level survey by USGS on August 27, 1997.
COOPERATION - U.S. Department of Energy as part of the Nevada Environmental Management Operations Activity.
REMARKS - Periodic water-level measurements are made throughout the Nevada National Security Site (NNSS) and adjacent areas to aid in characterizing the local and regional groundwater flow systems. The following data have been collected and reviewed according to quality-assurance requirements specific to the NNSS.
