USGS Water-Year Summary for Site 07260800

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	00060 Discharge(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

07260800 ARKANSAS RIVER NEAR MORRILTON, AR

LOCATION - Lat 35°07'37", long 92°43'54" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 sec.29, T.6 N., R.16 W., Conway County, AR, Hydrologic Unit 11110203, on left bank upstream from bridge on State Hwy 9, 2.0 mi southeast of Morrilton, 4.0 mi downstream from A.V. Ormon (No. 9) Lock and Dam, and at river mile 189.1.

DRAINAGE AREA - 155,000 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - Oct 1926 to current year.

GAGE -

Water Stage Recorder: Datum of gage is 255.81 ft above NAVD of 1988, (Reference Frame NAD_83 (2011) (EPOCH:2010.0000) GEOID18).

Prior to January 19, 2024, the datum of gage was 255.96 ft NAVD88.

Prior to January 9, 2020, the datum of gage was 255.93 ft NAVD88.

Prior to June 25, 2018, the datum of gage was 255.55 ft NGVD29.

Prior to April 7, 1948, the datum of gage was 265.55 ft MGD.

Prior to June 28, 1927, the datum of gage was 265.90 ft MGD.

There are references in the Weather Bureau "Station Inspection Report", where correspondence mentions elevations in 1883 and 1844 from the old Lewisburg gage, U. S. Engineers, Memphis District, approximately 0.5 miles upstream as well as approximately 0.3 ft higher datum.

REMARKS - As the number of streams on which streamflow information is likely to be desired far exceeds the number of continuous-record stream-gaging stations feasible to operate at one time, the USGS collects limited streamflow data at sites other than the continuous-record stream-gaging stations. When limited gage-height data are collected on a systematic basis over a period of years for use in hydrologic analyses, the site at which the data are collected is called a stage-only station. Data collected at these stations are usable in low-flow or floodflow analyses, depending on the type of data collected. The following table contains the annual maximum stage for this stage-only station. Typically no discharge measurements are made at stage-only stations. Only the maximum gage-height for the water year is given. The years given in the period of record represent water years for which the annual maximum has been determined. Discharge measurements in the following table were made at this special study or miscellaneous site during the 2010 water year.