What if the Old River Control Structure fails?

Failure of the Old River Control Structure and the resulting jump of the Mississippi to a new path to the Gulf would be a severe blow to America’s economy, robbing New Orleans, Baton Rouge, and the critical industrial corridor between them of the fresh water needed to live and do business.

What is the purpose of the Old River Control Structure?

The Old River Control Structure is a floodgate system in a branch of the Mississippi River in central Louisiana. It regulates the flow of water from the Mississippi into the Atchafalaya River, thereby preventing the Mississippi River from changing course.

What is the problem with the Atchafalaya River?

Throughout the Atchafalaya Basin, we’re seeing degraded water quality, reduced forest health, and damaged habitat for wildlife. In some places, water flows the wrong way, causing semi-permanent flooding that hurts forests.

When was the Old River Control Structure?

The Old River Control project consists of several large engineering structures. These structures include the Old River Low Sill and Overbank Structures that began operation in 1962; the Old River Lock completed in 1963; and the Auxiliary Structure built in 1986.

What city will flood if the Old river Control Complex fails?

The biggest city threatened would be Morgan City (population 12,000), which lies at the mouth of the Atchafalaya, near the shores of the Gulf of Mexico.

What happened during the 1973 flood?

The 1973 flood was the first time the Morganza Spillway was opened: from April 19 through June 13. The largest single inundation, south of St. Louis, Missouri, was caused by a series of catastrophic levee failures on the west bank of the river and ultimately covered almost 9,400 square miles (24,000 km2).

Why is the Atchafalaya Basin so low 2021?

Oil and gas pipelines disrupt the natural movement of flow and sediment within the wetlands. The development of the Lower Atchafalaya River, from a tidal to a riverine system, has created natural levees along the banks of the river, disrupting the movement of flow and sediment into the wetlands.

Why is the Atchafalaya Basin so low?

Did the Mississippi flow backwards?

The force of the land upheaval 15 miles south of New Madrid, drowned the inhabitants of an Indian village; turned the river against itself to flow backwards; devastated thousands of acres of virgin forest; and created two temporary waterfalls in the Mississippi.

What caused the flood of 1973 in Louisiana?

Is Louisiana sinking?

Although sea-level rise is a major factor in Louisiana’s disappearing coast, even if sea-levels remained stable, Louisiana would still be sinking. This, combined with natural subsidence and sea-level rise, has resulted in Louisiana having one of the worst coastal erosion problems around the world.

Why are Louisiana’s wetlands disappearing?

Coastal wetlands disappearing. Natural causes include hurricanes, saltwater intrusion, subsidence, wave erosion and sea level rise, but human activities are most responsible for accelerated coastal land loss.

What happened to the old river control structure?

On April 14, 1973, the Old River Control Structure foreman walked out on the Low Sill Structure for an inspection to witness the collapse of a 67-foot-long wall along the south side of the intake channel.

Is the Mississippi River control structure at risk of failure?

This first part of a 3-part series will study the history and importance of this critical structure, and how it almost failed in 1973. Part II, scheduled to run on Monday, is titled, Escalating Flood Heights Puts Mississippi River’s Old River Control Structure at Increasing Threat of Failure.

When did the old river control structure discharge water into Atchafalaya?

Old River Control Structure discharging water into the Atchafalaya, May 2011. The Old River Control Structure is a floodgate system in a branch of the Mississippi River in central Louisiana. It regulates the flow of water leaving the Mississippi into the Atchafalaya River, thereby preventing the Mississippi river from changing course.

When was the lower Old River Project finished?

The project was finished in 1840. After that, the Lower Old River would flow eastward to the Mississippi when the Red River was high and the Mississippi was low, and westward to the Atchafalaya when the Mississippi was high and the Red River was low.