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- 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.
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USGS Water-Year Summary 2024
420014091442701 083N08W14A 1996USGS CRM-18
Sand and gravel aquifers (glaciated regions)
Holocene Alluvium
Holocene Alluvium
LOCATION - Lat 42°00'14", long 91°44'27" referenced to North American Datum of 1983, in NE 1/4 sec.14, T.83 N., R.8 W., Linn County, IA, Hydrologic Unit 07080205,
REVISIONS HISTORY - Revisions: Land-surface datum was updated to 722.94 ft NAVD88 on July 26, 2022, as determined by a GNSS Level II survey. Land-surface datum was previously published as 723 ft NAVD88. Discrete water-level measurements and groundwater level above NAVD88 time-series data prior to July 26, 2022, are referenced to the original datum.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 42.5 ft. Upper casing diameter 2 in; top of first opening 40 ft, bottom of last opening 42.5 ft. Drilled observation well, cased to 40.0 ft, screened from 40.0 to 42.5 ft. All depths below land-surface datum.
DATUM - Land-surface datum is 722.94 ft above North American Vertical Datum of 1988. Measuring point: unknown, 2.9 ft above land-surface datum, Mar. 19, 1996 to present.
PERIOD OF RECORD - Water-level measurements, water years 1997-2001; Continuous water-levels, water year 2015 - present
GAGE - Intermittent measurements with chalked tape, or calibrated electric tape.
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 42.5 ft. Upper casing diameter 2 in; top of first opening 40 ft, bottom of last opening 42.5 ft. Drilled observation well, cased to 40.0 ft, screened from 40.0 to 42.5 ft. All depths below land-surface datum.
DATUM - Land-surface datum is 722.94 ft above North American Vertical Datum of 1988. Measuring point: unknown, 2.9 ft above land-surface datum, Mar. 19, 1996 to present.
PERIOD OF RECORD - Water years 1996-1998; 2015-present
