- 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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Water-stage recorder. Datum of gage is NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Apr. 20, 1965, nonrecording gage at same site and datum. Satellite telemeter at station.
Headwater Gage: The reservoir level recorder consists of a Sutron Satlink 2 Data Collection Platform (DCP) with logger, as well as a Stevens Type AP recording transmitter set over a 30-inch-diameter steel pipe float well constructed as an integral part of the structure. It is located in a recess in the concrete wall at the left downstrean corner of the emergency generator and fan room near the ceiling at elevation 184.5. The transmitter actuates a Stevens Type PJ-C counter indicator which is integral with the instrument board in the control room of the power house. The transmitter is operated by electrical power. This gage is known as "Sam Rayburn Reservoir near Jasper, Texas."
The float well is connected to the reservoir by two 3-inch pipe intakes. The lower intake enters the gage well at elevation 120.5 and is 214 feet long. The intake at the reservoir to the lower connection to the gage well is at elevation 119.5 and is set in a recess in the face of the left upstream retaining wall. The lower intake is equipped with a 1-inch gate controlled compressed air connection and a 3-way cock between two 3- inch wedge gate valves provided for flushing the well. These controls are in the locked storage room behind the electrical shop and storage room. The upper intake enters the gage well at elevation 143.5 and is 145 feet long. (The upper intake is controlled by two 3-inch wedge gate valves with a gate controlled compressed air connection between them. Those controls can be operated from the staircase landing at elevation 143.0.) The intake to the upper gage well intake at the reservoir is at elevation 142.5 and is set in a recess in the face of the left upstrean retaining wall.
Tailwater Gage: The tailwater recorder consists of a Stevens Type AP recording transmitter set over a 20-inch diameter steel pipe well constructed as an integral part of the structure. The instrument is located in the generator room upstream from and adjoining the elevator shaft at elevation 124.0. The transmitter actuates a Stevens Type PJ-C counter indicator which is integral with the instrument board in the control room of the powerhouse. The transmitter is operated by electrical power. The tailwater gage well is connected to the tailrace by one 3-inch intake, 263 feet long, which enters the gage well at elevation y6.o. This intake is equipped with two 3-inch wedge gate valves with a compressed air connection between them. The gate valves for flushing the well can be operated from the stairway landing at elevation 75.25. The inlet is at elevation 74.0. It is equipped with a strainer and is located in the right wall of the tail-race about 7 feet from the end of the paved tailrace apron and 51 feet upstream from the control weir.
Outside tile gages: The headwater gage consists of five sections, black tile graduations and numerals on white tile background. Sections IA (elevation 105.0-153.0) and 2A (elevation 153.0-158.0) are set in concrete in the right upstream retaining wall. Sections lb (elevation 158.0-165.0), 2b (elevation 165.0-174.0), and 3b (elevation 174.0-183.7) are located on the face of the right end. wall of the power intake structure. The tailwater gage consists of two sections black tile graduations and numerals on white tile background, set in concrete on the right training wall of the tailrace. One section reads from elevation 81.0 to 117.0. The other section reads from elevation 116.0-125.7.
Elevation (feet) Top of dam............................................................ 190.0 Design flood.......................................................... 183.0 Crest of spillway..................................................... 176.0 Top of flood-control pool............................................. 173.0 Top of conservation pool (power pool)................................. l64.4 Top of power head and sediment pool................................... 149.0 Lowest gated outlet (invert).......................................... 105.0
