Wednesday, April 5, 2017

Today's Press Release About Lake Level and Discharge

From the good folks at the PRVWSD:

Media Release
For Immediate Release
5 April 2017
Lake falling, no increase in discharge expected

Barnett Reservoir lake levels began falling Tuesday night after Pearl River Valley Water Supply District officials got ahead of inflows caused by Sunday rain event throughout the Pearl River Basin, and no further increases in the discharge from the dam is expected.

During Wednesday’s 9 a.m. conference call with the National Weather Service Jackson, the Lower Mississippi River Forecast Center in Slidell, the U.S. Army Corps of Engineers in Vicksburg, the U.S. Geological Survey, and the City of Jackson, PRVWSD, it was decided to keep the discharge at 43,000 cubic feet per second for another 24 hours.

The National Weather Service is still forecasting a crest of between 33.5 and 34 feet on the Pearl River at Jackson for Thursday. At 34 feet, some minor street flooding will occur in Jackson but water will not threaten homes or businesses.

“We took the discharge to 43,000 cubic feet per second Tuesday afternoon and at about 9 p.m., the lake peaked, turned around and started falling,” said John Sigman, PRVWSD general manger. “The lake reached 298.6 on Tuesday, the highest we’ve been in over 10 years. Now we can start working to track the fall and bring this event to a conclusion.”

The lake level was 298.4 at 9:15 a.m. Wednesday.

Sigman explained that while the worst of flood threats has passed, high water conditions will continue for two weeks. Inflows into Barnett Reservoir will remain above 30,000 cubic feet per second for at least another 10 days, which means the rate of discharge at the spillway will track at a similar rate.

Spillway Road across the dam remains open in both directions, but the access road to the fishing area below the dam on the Madison County side is closed until further notice.

The public can track river forecasts online.

For the Reservoir: http://water.weather.gov/ahps2/hydrograph.php?wfo=jan&gage=jsnm6

For Jackson: http://water.weather.gov/ahps2/hydrograph.php?wfo=jan&gage=jacm6

The U. S. Geological Survey offers real-time looks at river gauges. There are 14 real-time gauges in the watershed above the dam that can be accessed online at https://waterdata.usgs.gov/ms/nwis/current/?type=flow.

The USGS’s Jackson gauge can be found at https://waterdata.usgs.gov/ms/nwis/uv/?site_no=02486000&PARAmeter_cd=00065,00060

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