True, but when the normally dry side of a levee is soaked, the integrity of the levee will be compromised. If the river levees are breached we would have an endless supply of water pouring into New Orleans. Equilibrium would occur when the "bowl" is filled to river-level and starts running OUT...............
Army working to help stop New Orleans flooding
August 31, 2005
VICKSBURG, Miss. (Army News Service, Aug. 31, 2005) — Although the category-four winds and rains have dissipated, major flooding continues to be a problem in the New Orleans area and the Army Corps of Engineers is working to help.
One source of flooding was the Aug. 30 overtopping and subsequent breaching of the London Avenue Canal floodwall at 6100 Pratt Drive, New Orleans, Corps officials said. They said Corps personnel are continuing to evaluate information on the breaching and are developing plans to seal it off.
One element of this plan is to use up-to-3,000-pound sand bags on the 17th Street Canal. Army National Guard Chinook helicopters are expected to begin assisting in the operation soon, officials said.
Access to breach sites continues to hamper efforts to close them, officials said. Barges and cranes cannot be moved through the Industrial Canal due to motor vessels and other large debris blocking the canal. Vessels must go around and through the Gulf Inner-Coastal Waterway or the Mississippi River Gulf Outlet.
The Mississippi River is closed to vessel traffic from Southwest Pass to Natchez, MS. The Army National Guard, U.S. Army, U.S. Coast Guard, other federal and state authorities, and private contractors are all working alongside the Corps to bring in necessary materials, supplies and equipment to begin making inroads to the damage.
The Corps is working with two major contractors to determine the scope of unwatering services available to inundated areas.
The Corps of Engineers Motor Vessel “Kirby Responder” is surveying the Gulf Inner-Coastal Waterway from Pascagoula, Miss., toward News Orleans with U.S. Coast Guard members on board to help determine what can be navigated.
They will survey Baptiste Collette Aug. 31, officials said, weather permitting.
The survey vessel LaFourche is currently surveying the condition of the navigation channel from Baton Rouge to Southwest Pass.
Corps of Engineers motor vessels are also delivering barges with cranes and excavating equipment and critical recovery materials.
The Port Allen Lock reopened Aug. 30 and remains on auxiliary power, officials said. Algiers Lock and Harvey Lock are operating.
The Industrial Canal Lock is operating on an emergency generator and officials said the lock is expected to be operational in the near future. The canal is blocked with vessels, loose barges and boats. All other Corps of Engineers waterway facilities are open for normal operations.
The Port Allen Lock has been designated as a staging area for the Federal Emergency Management Agency. In support of FEMA, the U.S. Army Corps of Engineers is contracting for:
• emergency clearance of debris to enable reconnaissance and movement of emergency personnel and equipment.
• temporary construction of emergency access routes, including damaged streets, roads, bridges, ports, waterways, airfields, and any other facilities necessary for passage of rescue personnel
• emergency restoration of critical public services and facilities including supplying adequate amounts of drinking water, temporary restoration of water supply systems and providing water for fire fighting
• emergency demolition or stabilization of damaged structures and facilities as designated by state or local governments
• immediate emergency supplies including ice and water
• emergency power generation at critical sites (hospitals, shelters, etc.)
• temporary roofing and temporary housing
• technical assistance and damage assessment, including structural inspection of structures
• unwatering to assist the state of Louisiana by performing and or contracting to remove water from New Orleans and the greater metropolitan area.
While the Corps is coordinating public works and engineering activities under FEMA, it will also provide direct assistance under Flood Control and Coastal Emergency authorities, officials said.
Aerial reconnaissance of the region has been conducted. Corps ground reconnaissance teams have observed that most houses have major damage to their roofs and officials said they expect roofing to be a huge mission. Communications also continues to be a major issue, they said.
Corps teams forward in the area have been unable to contact all parish emergency officials and determine pump station conditions. They are currently contacting Levee Boards to determine local capabilities for assistance in filling breeches, evaluating the extent of damage, etc., and are coordinating with the Louisiana Emergency Operations Center, officials reported.
The Corps has also maintained close communication with the U.S. Geological Service regarding water stage data in Louisiana. Gage data for Lake Pontchartrain indicates that the lake is slowly draining, officials said. Based on the present rate of fall observed for the last eight hours, they said the lake level should return to normal level in about 36 hours.
As recovery efforts continue to gather momentum, numerous U.S. Army Corps of Engineers personnel from across the nation are arriving in the region to help tackle the mission ahead.
Other military efforts in the area incude:
• Defense Coordinating Officers and Defense Coordinating Elements, known as DCEs, are on site in Clanton, Ala., Baton Rouge, La., and Jackson, Miss., to liaison between U.S. Northern Command, FEMA and the Department of Defense.
• Maxwell Air Force Base, Ala., Naval Air Station Meridian, Miss., Barksdale Air Force Base, La., Alexandria, La., and Ft. Polk, La., have been designated as federal operational staging areas to expedite the movement of relief supplies and emergency personnel to affected areas.
• U.S. Transportation Command is flying 8 swift water rescue teams from Calfornia to Lafayette, La. These California-based teams provide about 14 personnel with vehicles and small rigid hulled boats who are highly trained and capable of rescuing stranded citizens from flooded areas.
• The hospital ship, USNS Comfort, is departing Baltimore to bring its medical assistance to the Gulf region. The Comfort should reach the area in seven days, officials said.
• Three Army helicopters from III Corps at Fort Hood, Texas, are in Baton Rouge and two more in Mississippi to assist with search and rescue and damage assessment.
• USNORTHCOM established Joint Task Force Katrina to be the military’s on-scene commander in support of FEMA. Lt. Gen. Russel Honoré, commander of First Army at Fort Gillem, Ga., is the JTF commander. JTF-Katrina will be based out of Camp Shelby, Miss.
• JTF-Civil Support is providing a joint planning augmentation cell.
• U.S. Northern Command’s Joint Operations Center is on 24-hour duty in Colorado Springs, Colo., to facilitate any additional requests for assistance that may come from FEMA representatives.
(Editor’s note: Information taken from Army Corps of Engineers and U.S. Northern Command news releases.)
I would worry when they dewater the lake water, and the saturated conditions and increasing pressure from the river could cause a rupture of the river levees which are still intact, as far as we know.
"To: jeffers
Max pressure on a levee occurs when all the water is on one side.
True, but when the normally dry side of a levee is soaked, the integrity of the levee will be compromised."
Agreed.