From The Sky Above: Barker Dam and Reservoir
June 7, 2016
Houston photographer Jim Olive took this photo of Barker Dam and Reservoir in west Houston on Sunday, June 5, at around 11:30 a.m.
The dam gates had just been opened, and water from recent rains was pouring from the reservoir’s temporary lake into Buffalo Bayou, which flows through Barker Reservoir through the center of Houston and into Galveston Bay. Water impounded from several creeks behind nearby Addicks Dam also flows into Buffalo Bayou below Barker Dam. The dams were built in the 1940s to protect downtown Houston from catastrophic flooding.
Record rains that fell on west Houston and elsewhere on April 18 filled the two flood control reservoirs with unprecedented amounts of water. Rains since then have slowed releases from the normally empty basins, which contain large, forested parks and recreational facilities. The Army Corps of Engineers, which owns and operates the dams, closes the dam gates during a rain, and rain adds more water to the reservoirs, which must be emptied as quickly as possible in order to create room to hold back future stormwater. Maximum capacity, the volume beyond which water will begin to spill around the ends of the dams, is 199,643 acre-feet for Addicks and 209,600 acre-feet for Barker. Addicks Reservoir is just to the north of Barker on the northern side of Interstate 10.
The combined peak pool behind the two reservoirs was more than 206,000 acre-feet around April 22, with Addicks reaching some 122,000 acre-feet or a little more than two-thirds of maximum capacity. Despite record high extended releases from the dams for the last seven weeks, the two reservoirs have been drained by less than half, standing at a combined volume of 114,210 acre-feet on Tuesday early afternoon.
No Changes in Operation of Buffalo Bayou Dams
Release Rates May Be Looked At in Future
March 13, 2016
It was a dark and stormy night. Thunder boomed and heavy rain pelted the roof as a small group of us sat nervously in the middle of the rising Addicks Reservoir in far west Houston listening to the district commander of the Army Corps of Engineers tell us Addicks and Barker dams are safe.
Flanking Col. Richard Pannell last Wednesday, March 9, was a panel of officials from the Corps’ Galveston District office, as well as representatives from the Harris County Flood Control District and Granite Construction, the company awarded the $71.9 million contract to replace the leaky conduits in the 70-year-old earthen dams. The audience was a small crowd of about thirty hardy citizens who had braved the heavy traffic and heavy rain and managed to find the Bear Creek Community Center in the middle of a dark, wet forest despite the wrong address in the Corps’ public notice.
Col. Pannell made a thorough and convincing presentation of the history of the dams, the current problems, and what is being done about them. Among other work, the conduits in the two dams will be entirely replaced by new conduits in separate locations. This process will take about three years. He emphasized that the dams were in no immediate danger of failing and explained that the dams are labeled “extremely high risk” because of the potential consequences to Houston, the nation’s fourth most populous city, in the unlikely event that the dams failed.
Dams Operating Normally Despite Leaks
There were several questions about the capacity of the dams and the impact of repairs on the rate of future releases of water impounded behind the dams. The pattern of extended high releases and rapid drops has been criticized for damaging property on the bayou and killing trees and vegetation that control erosion.
After the enormous Memorial Day storm last year, the Corps began releasing impounded stormwater at 3000 cubic feet per second (cfs) for the first time. Normally the release rate is limited to 2000 cfs as measured by the Piney Point gauge. The Corps does not release water from the dams during a rain event, and the high releases began on June 1 and continued for ten days, finally dropping on June 12. The banks were already saturated from the storm, and the damage from the extended high flow was plainly visible up and down the bayou.