Louisiana Coastal Wetlands Lawyer & Attorney : Erich P. Rapp : Kean Miller Law Firm : Serving New Orleans, Baton Rouge, Shreveport, Louisiana

As I have written many times before, the principal cause of coastal wetland loss is the reduction of sediment load in the Mississippi River. The reduction in sediment load has been caused primarily by the construction of locks and dams in the Mississippi River drainage basin, and the dams in the Missouri and Arkansas River systems are the most significant.

For the Corps of Engineers representatives working north of Louisiana, the reduction in the sediment load is a good thing. If your primary concern is navigation in the river system, a river with little sediment load is a good river. It means the Corps does not have to dredge the river bed as much.

In contrast for the Corps of Engineers in New Orleans tasked with coastal wetland restoration, a river with a limited sediment load makes their restoration job harder. Of course, the Corps in New Orleans is also given the task of maintaining navigation on the Southern course of the river. Thus, the Corps in New Orleans also prefers the smallest possible sediment load for management of their navigation responsibilities.

Which objective does the Corps serve? How do they decide which objective to serve and when? As far as I can determine, the Corps gives no consideration to the sediment load in the Mississippi River system needed for restoration and preservation of Louisiana's coastal wetlands when the Corps makes decisions about river management north of Louisiana. As a practical matter, the Corps cannot serve both objectives with no oversight and be expected to preserve and restore Louisiana's coast. The navigation interest extends for most of the river system course and the focus on preservation and restoration of coastal wetlands is an active part of decision making only in the Southernmost section of the river. Preservation and restoration of coastal wetlands loses and navigation wins in that internal competition at the Corps. As a practical matter, it cannot be any other way. 

The responsibilities for decision making need to be split and a neutral third party needs to be responsible for balancing the two interests.

A good recent news article expressing concern with the negative impact of sediment load on navigation can be found in the Baton Rouge Advocate on April 12, 2008. The article was written by John A Colvin and is entitled, Mississippi River sediment piling up.

Erich.

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On January 10-11, 2008, a two day conference on the Atchafalaya River was held in Baton Rouge. Over 150 faculty members from Louisiana universities, representatives of various state and federal agencies and interested individuals attended the conference. The purpose of the meeting was to review what people know about the river and its surrounding environment, to report on recent and ongoing research related to the river, and to identify information gaps that have a negative impact on decision making by land and water managers and government policy makers. The program included 30 presentations on research being conducted in relation to the Atchafalaya River and the surrounding basin

The Atchafalaya River is a 140 mile long distributary channel of the MIssissippi River. The delta at the Gulf end of the river is the only actively building delta in the Gulf of Mexico. The Atchafalaya transports 100% of the Red River sediment and 25% of the Mississippi River sediment. Because the gates at the Old River Control structure which joins the Mississippi River and the Atchafalaya River do not trap sediment in the way that other locks and dams do, the Atchafalaya River delta is allowed to continue a building process from the deposit of sediment.  Over time not only is the river delta building but the Atchafalaya basin itself is also naturally filling in and evolving from open water to cypress swamp to bottomland forest.

The delta building process that continues for now in the Atchafalaya is the same process that has ceased to function in the Mississippi River delta. This failure of this process has been the principal cause of the loss of coastal wetlands in Louisiana which, of course, is the subject of this blog. The study of the ongoing delta building process in the Atchafalaya river and basin is thus worthwhile to better understanding events in the Mississippi River delta.   

Erich.

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