CAVE EDITOR'S NOTES:
US ARMY CORP OF ENGINEERS NEWS RELEASE
July 7, 2011 is scheduled for diversion through regulating tunnels to allow for routine inspection of spillway slabs at Ft. Randall Dam (dam upstream from Gavins Point)
Pickstown, S.D. —The U.S. Army Corps of Engineers invites the public to witness the diversion of surplus water out of Fort Randall Dam through the dam’s four regulating tunnels July 7, between 10 a.m. and 2 p.m.
“This is only the second time in history that such a high volume of water will be released through the regulating tunnels,” said Tom Curran, Fort Randall Dam operations manager.
The opening of the regulating tunnels will equate to a flow of approximately 120,000 cubic feet per second (cfs) through these 22-foot diameter pipes. The water will be diverted to allow for routine inspection of the spillway slab at the dam. The spillway slab is 40 acres of concrete with a thickness of 2 – 6 feet, used to carry water downstream and away from the spillway gates.
MONTHLY RESERVOIR OPERATION - MAY 2011 - PECK, GARRISON, OAHE, BIG BEN, FT. RANDALL, GAVINS POINT
FOLLOWING LINK UPDATES DAILY:
http://www.nwd-mr.usace.army.mil/rcc/reports/showrep.cgi?3MRDTAP7
THE FOLLOWING ARE LINKED TO A PICTURE:
June 27, 2011
JUNE 26, 2011
JUNE 25, 2011
JUNE 24, 2011
June 27, 2011
JUNE 26, 2011
JUNE 25, 2011
JUNE 24, 2011
A guide assisting in reading this report:
- Under 'Project Information' are the capacities of each reservoir referring to the dam/reservoir's elevation above sea level.
- MP means the minimum power pool or a normal lake level- FC means flood control of the maximum height the reservoir can hold before water goes over the emergency spillways (called an "uncontrolled release").
- Current data shows the reservoirs actual level at the time of observation- acre-feet of the lake's surface- inflow to the lake/reservoir and discharge out the dam's control structures/spillway.
- The last figure in each project- probably the figure most telling- is the percentage of flood control capacity left in that particular reservoir/lake.
http://www.nwo.usace.army.mil/html/Lake_Proj/fortpeck/welcome.html
59600 cubic feet per second (cfs) June 24, 2011
60200 cubic feet per second (cfs) June 22, 2011
61800 cubic feet per second (cfs) June 21, 2011
percentage of flood control capacity left in that particular reservoir/lake 110.4% June 24, 2011
percentage of flood control capacity left in that particular reservoir/lake 112.9% June 22, 2011
percentage of flood control capacity left in that particular reservoir/lake 112.9% June 21, 2011
percentage of flood control capacity on JUNE 15, 2011 115.1%
http://www.nwo.usace.army.mil/html/Lake_Proj/garrison/welcome.html
150300 cubic feet per second (cfs) June 24, 2011
150400 cubic feet per second (cfs) June 22, 2011
150200 cubic feet per second (cfs) June 21, 2011
percentage of flood control capacity left in that particular reservoir/lake 103.0% June 24, 2011
percentage of flood control capacity left in that particular reservoir/lake 102.4% June 22, 2011
percentage of flood control capacity left in that particular reservoir/lake 101.0% June 21, 2011
percentage of flood control capacity on JUNE 15, 2011 98%
http://www.nwo.usace.army.mil/html/Lake_Proj/oahe/welcome.html
150400 cubic feet per second (cfs) June 24, 2011
153900 cubic feet per second (cfs) June 22, 2011
160300 cubic feet per second (cfs) June 21, 2011
percentage of flood control capacity left in that particular reservoir/lake 94.3% June 24, 2011
percentage of flood control capacity left in that particular reservoir/lake 92.7% June 22, 2011
percentage of flood control capacity left in that particular reservoir/lake 89.8% June 21, 2011
percentage of flood control capacity on JUNE 15, 2011 87.8
http://www.nwo.usace.army.mil/html/Lake_Proj/bigbend/welcome.html
165000 cubic feet per second (cfs) June 24, 2011
162900 cubic feet per second (cfs) June 22, 2011
162900 cubic feet per second (cfs) June 22, 2011
158900 cubic feet per second (cfs) June 21, 2011
percentage of flood control capacity left that particular reservoir/lake 47.0% June 22, 2011
percentage of flood control capacity left that particular reservoir/lake 31.7% June 22, 2011
percentage of flood control capacity left that particular reservoir/lake 0.0% June 21, 2011
percentage of flood control capacity on JUNE 15, 2011 0.0%
http://www.nwo.usace.army.mil/html/Lake_Proj/fortrandall/welcome.html
137800 cubic feet per second (cfs) June 24, 2011
139600 cubic feet per second (cfs) June 22, 2011
143500 cubic feet per second (cfs) June 21, 2011
percentage of flood control capacity left in that particular reservoir/lake 79.4% June 24, 2011
percentage of flood control capacity left in that particular reservoir/lake 68.7% June 22, 2011
percentage of flood control capacity left in that particular reservoir/lake 62.4% June 21, 2011
percentage of flood control capacity on JUNE 15, 2011 51.7%
http://www.nwo.usace.army.mil/html/Lake_Proj/gavinspoint/welcome.html
158500 cubic feet per second (cfs) June 24, 2011
150900 cubic feet per second (cfs) June 22, 2011
150000 cubic feet per second (cfs) June 21, 2011
percentage of flood control capacity left in that particular reservoir/lake 53.0% June 24, 2011
percentage of flood control capacity left in that particular reservoir/lake 62.8% June 22, 2011
percentage of flood control capacity left in that particular reservoir/lake 51.6% June 21, 2011
percentage of flood control capacity on JUNE 15, 2011 52.3
