It turns out we've got plenty time left.
A new forecast for saltwater intrusion moving up the Mississippi River has surprisingly bought lots more time for the New Orleans area — and raised the possibility that most of the city and Jefferson Parish could be spared from the threat altogether.
The change in forecast had to do with factors related to the river’s flow, work by the Army Corps of Engineers to elevate a sill and the Mississippi’s depth at the salt water’s current location.
The cone of uncertainty for the arrival of this wedge must be pretty wide. Who even knows the correct speed of salt anyway? Anyway, the wedge isn't coming as quickly as they thought. There's a bunch of reasons listed for that in this article. The river didn't lose as much flow as they thought it would. The salt is also sinking into a "pocket" in the riverbed near Belle Chase. Possibly a tandem float ran into a tree. I don't know.
But it does change the plans a bit. Maybe by a $250 million bit, in fact.
On top of that, based on modelling through November, the Corps now thinks the leading toe of the salt water — at the bottom of the river — could stop somewhere between river mile 112-113, or in the River Ridge-Kenner area.
If that does occur, the toe will not have reached far enough to cause salinity on the surface of the river at the locations of the West Jefferson plant in Marrero, New Orleans’ Carrollton plant for its east bank and the East Jefferson plant.
As a result, chloride levels in drinking water would be expected to remain below the 250 parts per million threshold for those plants. Surface water tends not to exceed that standard until the toe advances 15 to 25 miles upriver from it, given the wedge shape of the intrusion.
New Orleans may be able to avoid having to build an emergency pipeline to dilute the salt water at an estimated cost of between $150 million and $250 million. The Corps cautions, however, that forecasts could very well change. It now plans to update its forecasts for the public every Thursday.
That's quite a difference from just a few days ago when it looked like the pipeline wouldn't even make it on time. A similar effort in Jefferson Parish appeared to be moving faster which led everyone to begin making the usual jokes/trolls about comparative governmental efficiency. Little did they know Orleans was "leading the way," the entire time.
When it comes to where Orleans parish stands currently in its effort to mitigate the saltwater intrusion, when compared to neighboring parishes, Cantrell says the parish is ‘leading the way’.
“I'm saying don't believe the hype. The city of New Orleans, Sewerage and Water Board, we're leading in this capacity, or we're getting the responses that were due,” she said.
“Again, at the federal level. I've been always leaning in, always attached to the briefings, always advocating picking up the phone and calling myself so no asks have been done by anybody else. First, but me. But of course, echo, you continue to ask. And you continue to serve, circle the wagons to demonstrate why the solution is a collaborative one, that there's buy-in across the board, that we can actually get it done, that we have the talent to get it done. And we need the resources the federal government is listening, and the state is listening.”
Always leaning in, yes. That's what you have to do when you serve, circle the wagons. But then we found out it is just as important to lean in with accuracy.
"So, make no mistake about it, the city of New Orleans is not behind anybody, or anyone. The city of New Orleans is leading in this capacity. You know, regardless of what you hear," she said.
But not long after she said that, Jefferson Parish began construction on their West Bank pipeline. Meanwhile, Orleans is still nailing down contractors. Usually, the city's procurement process can take months. When asked if they were expediting the process, she said the city is moving ahead.
"So again, working aggressively every day. The contract and procurement process has started, in short order will be completed, because the time is now. We all understand that. And everyone is lean, leaning in with urgency, but also wanting to lean in with accuracy," Mayor Cantrell said.
On second thought, maybe the thing that's actually holding the wedge back is the great wall of sound that happens whenever the mayor speaks. Whatever it is, it's working. Keep doing that.
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