The 2019 - 2020 Bonnet Carre Spillway Opening

The 2019 Bonnet Carre Spillway opening, what will be the lasting effects to the Ms Gulf Coast?

The opening of the Bonnet Carre Spillway, 27 February, 2019. Image copied from Wikipedia.org

French Hermit Oyster Farmers, Mike and Anita Arguelles, copied from Sun Herald article

Mike and Anita Arguelles, French Hermit Oyster Farmers, lost all their oysters to the influx of fresh waters when the Bonnet Carre Spillway was opened.

On Wednesday August 28, I attended the Sun Herald Bonnet Carre Spillway Community Forum held at the Knight NonProfit Center on Seaway Road in Gulfport, Ms.

Each of the 4 panelist presented their view of the consequences of the opening of the Bonnet Carre Spillway. I've listed their description from the Sun Herald handout and some of my notes from what they said that day.


Anita Lee - Investigative Reporter, Sun Herald

Anita Lee has written most of the Sun Herald's coverage on the spillway opening. Lee is a Mississippi native who specializes in investigative, court and government reporting. She has covered South Mississippi's biggest stories in her decades at the Sun Herald, including the Dixie Mafia, public corruption and Hurricane Katrina, a Pulitzer-winning effort.

The articles she wrote about the spillway were very helpful and as a base of knowledge about the effects of the Bonnet Carre Spillway opening

He founded the organization in 1984 to promote marine research, conservation and education. He has conducted pioneering research on dolphins and sea turtles both in the wild and under human care.


Dr. Moby Solangi Ph.D., President and Executive Director Institute of Marine Mammal Studies

Rick Burris, Deputy Director of the Department of Marine Fisheries

He has been at the Department of Marine Fisheries (DMR) for 12 years, previously as a marine fisheries scientist and as Director of the Shrimp and Crab Bureau. He represents the DMR on numerous state and federal committes.

  • After the spillway opening seasonal shrimp catch numbers are down.
  • shrimpers have to travel farther, away from the fresh water to catch shrimp
  • After the spillway opening, most oysters are dead from the fresh water

Save Louisiana Coalition represents over 1000 members of the commercial and recreational fishing industries, as well as seafood wholesalers, restaurant owners, tackle store owners, and coastal community residents. Ricks has become a student of salinity and freshwater intrusion in coastal waterways.

Captain George Ricks, Charter boat captain and President of the Save Louisiana Coalition

Captain George Ricks said, "My Dad said ‘You can’t breed giraffes and get monkeys.

You can’t have saltwater species in river water. Simple as that. Our crabs, our shrimp, our oysters, speckled trout, our tourism, we can’t do it in river water.

“If we had to rely on catfish, bass, frogs and alligators, that would be one thing, but our whole economy is driven off of our saltwater industries, and that’s being eliminated by this influx of river water.”

“This has been the worst year for speckled trout I’ve ever had,” Ricks said.


I left the Sun Herald Bonnet Carre Spillway Community alarmed, with a sense of urgency to do something about the threat of freshwater intrusion into our Ms Sound Ecosystem.

Time to Take Action !

I am a retired Oceanographer who worked at NAVOCEANO for 40 years. I traveled the world for the U.S. Navy collecting and processing oceanographic data.

I have an undergraduate degree in Marine Science and Marine Ecology from the University of South Carolina. There I studied the ecology of the saltmarsh. Basically, you learned that the saltmarsh, is the nursery grounds for many saltwater ocean species. Without the saltmarsh, you won't have crabs, shrimp, oysters and many fish species we currently enjoy along our coast.

My graduate degree from the Florida Institute of Technology is in Bio-Environmental Oceanography. Here I learned the importance of keeping things in balance with the marine environment. If we allow the ecology of the environment to get out of balance, their may be problems for the species of the marine environment. I grew up fishing in both fresh and saltwater in South Carolina.

Comments are appreciated! Please send comments to: dunnygreen@gmail.com.


Nearly 200 turn out to talk about Coast’s spillway disaster. Here’s how you can help.

AUGUST 30, 2019 05:00 AM, UPDATED SEPTEMBER 04, 2019 11:42 AM

Nearly 200 people listened intently as panel members each told how they knew South Mississippi was in trouble after the Bonnet Carré Spillway was opened twice this year, bringing flood waters from the Mississippi River into the Mississippi Sound.

When they left the Sun Herald Bonnet Carré Spillway Community Forum on Wednesday at the Knight Nonprofit Center, audience members asked what they can do to protect the Coast, the seafood and the estuary.

Adding to their concerns was hearing about other Mississippi River diversions that are in the works in Louisiana. The experts said the Mid-Breton diversion would introduce fresh water into the salt water of the Sound over a longer period of time, bringing additional damage to seafood, the fisheries and tourism.

It proposes construction in Breton Sound at Plaquemines Parish, extending into the Mid-Breton Sound Basin. It would release 75,000 cubic feet per second of Mississippi River water, and could operate continuously throughout the year from January through July. This would release 9.74 trillion gallons of fresh water into the Breton Basin, the resolution says, which is about the same as this year’s record Bonnet Carré Spillway release.

“Living in Coastal Mississippi, especially in Hancock County, a lot of the time we are associated with being part of Louisiana,” said LaFontaine. “In some parts we’re even called a parish, Hancock County parish. But at the end of the day as an official, looking ahead at the next decade, we think of threats. Some of those threats are sometimes economic, some of the times they are hurricanes, but to me our single-most largest threat to the future of our coastal economy is probably the Mississippi River.”

Anything the county can do to advocate for dredging the river o to consider other solutions to eliminate diversion is probably better for the fisheries and Coastal economy, he said.

The supervisors also asked the governor to let federal agencies know that Mississippi “. . . exerts its territorial jurisdiction over certain waters that can and will be impacted by Louisiana’s proposed large-scale Mississippi River Diversion project.”

LaFontaine said he hopes other Coast counties will pass resolutions in support of the Gulf Coast Resource Coalition.

The fresh water intrusion from the polluted Mississippi River closed the water off every beach along the Coast for much of the summer and killed most of the oysters and brown shrimp. It’s not over yet, audience members said after the forum. Now that the spillway has closed, they await a fish kill as the oxygen levels stabilize and the waters return to normal salinity.

“There are so many facets to this story. It’s very complicated,” said Sun Herald reporter Anita Lee, who has written extensively about the spillway and the blue-green algal bloom that followed the fresh water intrusion into the Mississippi Sound.

IT’S A FEDERAL ISSUE

The rules that regulate when the spillways open were written almost a century ago in the 1920s and ‘30s, said Moby Sonalgi, executive director of the Institute for Marine Mammal Studies in Gulfport. The Army Corps of Engineers  regulates when the spillway  is opened based on the 1928 Flood Control Act.

Solangi said, "Some very powerful people were in the room, filled with engineers, environmentalists, those who fish for a living and others, who are concerned about the future of South Mississippi".

“All of you need to recognize your power,” Solangi told the audience. He urged them to talk to their Congressional delegation in Washington and ask them to change the rules and provide “flexibility and direction” for the Bonne Carre Spillway openings.

Dennis Lambert — who worked on the Breton diversions until he began questioning the project — said the Coastal Protection and Restoration Authority Board in Louisiana already has spent about $200 million.

“So you know how hard it is to stop that,” he said. So much money has been spent they can’t give it up — “They don’t want to give it up,” he said.

“The only people that can change what is going on are the people in this room and the state of Mississippi,” Lambert said.

ALSO A STATE ISSUE

Several people in the crowd said they want the issue interjected into Mississippi’s governor race so they know where the candidates stand.

Lee said in this election year, she questions if support from Jackson is about the election or about protecting the Coast.

“It’s very much a concern who will stand up for us,” she said.

Joe Spraggins, executive director of the Mississippi Department of Marine Resources, is meeting with the Army Corps on a regular basis and will be with the Congressional delegation next month, said Rick Burris, deputy director of Marine Fisheries. He said Gov. Phil Bryant and Secretary of State Delbert Hosemann also are very involved.

This is not the first time the Bonnet Carré Spillway has opened, Burris said, but all previous times except in 2011 it was in the winter. This year it was open twice for the first time and a record number of days, and in May. “That’s a critical time for our fisheries,” he said.

WHO TO CONTACT:

Now it’s a critical time for the Coast as progress continues in Louisiana toward building additional spillways.

Here is contact information for the Coast delegation in Washington, D.C.:

 ▪ Sen. Roger Wicker  — 555 Dirksen Senate Office Building, Washington, DC 20510

Phone: 202-224-6253

Coast office : 2909 13th St., 3rd Floor, Suite 303, Gulfport, MS 39501

Phone 228-871-7017

 ▪ Sen. Cindy Hyde-Smith  — 702 Hart Senate Office Building, Washington, DC 20510-2405

Phone 202-224-5054Coast office: 2012 15th St., Suite 451, Gulfport, MS 39501Phone 228-867-9710 Phone 202-225-5777

Washington, DC Office - 2349 Rayburn House Office Building, Washington, DC 20515, T: (202) 225-5772, F: (202) 225-7074


Hancock County takes ‘adamant opposition’ to Louisiana’s river diversion plans. Here’s why.

OCTOBER 07, 2019 03:10 PM, UPDATED OCTOBER 07, 2019 03:11 PM

Hancock County supervisors expressed “adamant opposition” to Louisiana’s plans to add another Mississippi River diversion and asked the governor and the Coast’s congressional delegation in Washington to join their fight.

The Board of Supervisors met Monday at the courthouse and passed three resolutions:

To oppose Louisiana’s proposed Mid-Breton Basin diversion project and the issuance of a federal permit for the construction of the project, asking Gov. Phil Bryant to do the same.Request the Coast delegation take take immediate action to repeal one law and defeat another that would allow the Mid-Breton project to go forward.To authorize an agreement between the county and the nonprofit Gulf Coast Resource Coalition to work together. The agreement says the coastal projects proposed by Louisiana “could extremely and negatively impact Hancock County’s coastal resources, communities and economy.”Board president Blaine LaFontaine said Louisiana’s master plan to create this new diversion project, “Will probably be the single-largest threat to the Gulf Coast and this economy — maybe in the next decade.

The supervisors know what happened this year when the Bonnet Carré Spillway was opened for 123 days for flood control on the Mississippi River.

“This inundation has caused massive harm to Hancock County’s economy and fisheries, as well as dire effects on the marine mammal population in and around the coastal waters of Hancock County,” the resolution said.

The project proposed in Louisiana would have a much bigger impact on Mississippi, the supervisors’ resolutions say.

The supervisors know what happened this year when the Bonnet Carré Spillway was opened for 123 days for flood control on the Mississippi River.

“This inundation has caused massive harm to Hancock County’s economy and fisheries, as well as dire effects on the marine mammal population in and around the coastal waters of Hancock County,” the resolution said.

The project proposed in Louisiana would have a much bigger impact on Mississippi, the supervisors’ resolutions say.

Louisiana’s Coastal Protection and Restoration Authority has filed Permit Application WQC 190227-01 with the U.S. Army Corps of Engineers to construct the  large-scale diversion project 


Nov 4th Harrison County votes to oppose the Mid-Breton Sound Diversion Project

The Harrison County Board of Supervisors met on 4 November and voted to oppose the Corps of Engineers scheduled Mid-Breton Sound project.

2019 late winter and early spring record rainfalll in parts of the Mississippi River basin lead to the spillway being opened twice in one year for the first time ever.

The extra fresh water changed the salinity structure of Lake Pontchartrain from brackish water system to a freshwater system while the gates of the Bonnet Carre Spillway remained open.


From the Gulf Coast Resource Coalition


Nov 4th, Harrison County votes to oppose the Mid-Breton Sound Diversion Project

The Harrison County Board of Supervisors met on 4 November and voted to oppose the Corps of Engineers scheduled Mid-Breton Sound project


On Wednesday, December 11th The Bonnet Carre Spillway & Louisiana Diversion Forum was held at USM Gulf Park Campus, in Flemming Auditorium from 1:30 - 5:30 p.m.

Historically, this was the first time officials from Louisiana and Mississippi met to discuss the Bonnet Carre Spillway problem and the planned Louisiana diversion projects.

At this meeting MDMR's Paul Mickle discussed the hydrodynamics of the Pearl River system.

Next, Joey Windham, Chief, USACE Mississippi Valley Watershed Division talked about the historic 2019 Mississippi River Flood. Here he spoke about the levels of the Ms River triggered the opening of the Bonnet Carre Spillway 2 times in 2019.

Brad Barth, the Mid-Basin Sediment Diversion Program Manager, CPRA talked about the Louisiana plan for river diversions of the Mississippi River, i.e. The Mid-Breton Sound River diversion. Brad talked about how this new diversion would not be anything like opening of the Bonnet Carre Spillway in 2019.

Next 4 panelists held a discussion about the effects of the Mississippi River and Diversions.

Panelists:

John Lopez, Lake Pontchartrain Basin Foundation     

Bren Haase, CPRA Executive Director

Moby Solangi, Institute for Marine Mammal Studies

Joey Windham,USACE Mississippi Valley Watershed Division

Read Hendon, USM Gulf Coast Research Lab

Each panelists talked about their area of expertise.

John Lopez, head of the Lake Pontchartrain Basin Foundation. Dr. Lopez assured everyone that there would be some interaction between La and Ms in the next year to avoid the tragedy of the Bonnet Carre Spillway openings of 2019.

Bren Hasse, CPRA Executive Director. He talked about the impending Mid-Breton Ms River diversion permitting process and assured everyone it was still about 9 years away from happening. He spoke about the Marine Mammals Act and how it was changed slightly just to get approvals for the next phases of the diversion project. 2024 was mentioned as a start date for the Mid-Breton Sound River Diversion.

Moby Solangi, Institute for Marine Mammals Studies. Dr. Solangi spoke about how the Mississippi River waters had changed in the last 100 years. Todays Ms River water contains runoff from upstream farmlands with nitrates and phosphates that cause algal blooms in the Ms Sound and ultimately beach closures. It also contains other toxins, that kill dolphins, turtles, oysters and change shrimp seasonal spawning patterns.

He also pointed out that the Mississippi and Mid-Breton Sounds are connected. And, he said the largest dolphin population in the United States lives in these waterways.

Anita Lee of the Sun Herald reported that: Moby Solangi, executive director of the Institute for Marine Mammal Studies, pointed out to applause, that the Mississippi and mid-Breton sounds are connected. He also said the biggest dolphin population in the United States is in these waterways.

Dr. Solangi said he was concerned that Congress granted a waiver from the Marine Mammal Protection Act, meaning dolphins could be killed or harmed for diversions.

Waivers from the act are not unusual, but Solangi said this one was because no study preceded the decision to grant them.

Louisiana officials point out that diversion impacts on dolphins must still be studied as part of the permitting process.

Dolphins died in record numbers this year after the spillway opened. Many had skin lesions that can occur when salinity levels are low.

Solangi also pointed out the Mississippi River, which drains 41% of the United States, is far more polluted than it was 100 years ago and could further degrade coastal waterways.

He is concerned that Congress granted a waiver from the Marine Mammal Protection Act, meaning dolphins could be killed or harmed for diversions. Waivers from the act are not unusual, but Solangi said his concern was because no study preceded the decision to grant them. 

Joey Windham, USACE Mississippi Valley Watershed Division. He reviewed the process of opening and closing of the different river diversions. He said future openings and closings should be studied to determine what will be best for both Louisiana and Mississippi.

Louisiana officials point out that diversion impacts on dolphins must still be studied as part of the permitting process.

Read Hendon, Head of the USM Gulf Coast Research Lab. He talked about model runs that were made to show the effects of the Bonnet Carre Spillway fresh water intrusion. In the future, these model runs may be used to determine how to control opening and closing of future river diversions.

This meeting marks the first time Louisiana and Mississippi have talked about working together to fix this problem. This story map will follow and report on upcoming issues as both states begin to work together on the problem of freshwater intrusion into La. and Ms. Marine Ecosystems.


‘Unlawful’ operation of Bonnet Carré prompts MS Secretary of State to sue US Army Corps

BY ANITA LEE

DECEMBER 30, 2019 01:57 PM

Anita Lee reported that Mississippi State Secretary Delbert Hoseman filed a suit against the U.S. Army Corps of Engineers.

The U.S. Army Corps of Engineers and Mississippi River Commission have violated federal law by failing to study the consequences of diverting Mississippi River Water into the Mississippi Sound through the Bonnet Carré Spillway, Secretary of State Delbert Hosemann says in a lawsuit filed Monday.

“This is not only unlawful, it is inexcusable,”the lawsuit says”

His office filed the lawsuit in U.S. District Court in Gulfport against the Army Corps of Engineers and MRC, the two agencies responsible for flood management on the river. The lawsuit also accuses the agencies of “willfully and obstinately” refusing to open the Morganza Floodway to relieve river flooding, despite the authority to do so.

The Mississippi Sound has borne the brunt of polluted river water, with trillions of gallons flowing through the Bonnet Carré in 2019 while the Morganza Floodway in centeral Louisiana remained closed. The discharge also includes river sediment that has blanketed the water bottoms of the Mississippi Sound.

The Bonnet Carré empties into Lake Ponchartrain and the Mississippi Sound beyond.

Hosemann wants a preliminary injunction that directs the federal agencies to also open the Morganza when river flooding is a problem instead of directing all the floodwaters through the Bonnet Carré.

He also is requesting that the judge order the federal agencies to update an environmental study, called an Environmental Impact Statement, that addresses the impacts of river water on the the Mississippi Sound. Previous studies have failed to evaluate damage to the Mississippi Sound, the lawsuits says.

Hosemann held a news conference Monday afternoon to announce the lawsuit, filed by attorneys from Balch & Bingham in Gulfport. Hosemann said he that his office was forced to file the lawsuit because the Corps has been unwilling to work with Mississippi on alternatives to opening only the Bonnet Carré.

“If the injunction is not granted, a substantial threat of irreparable injury exists in the form of massive freshwater inundation to a saltwater body, namely the Mississippi Sound,” the lawsuit says. “Such freshwater inundation will not only upset the delicate ecological balance of the Sound, but will also inflict serious economic damage to the people and businesses that derive their livelihoods from the Sound.”

ENVIRONMENTAL STUDY OUTDATED, LAWSUIT SAYS

An updated Environmental Impact Statement (EIS) would require the agencies to assess environmental impacts on the Mississippi Sound and consider less destructive alternatives to opening the Bonnet Carré.

This is the second lawsuit filed in federal court in Gulfport against the Army Corps and MRC. The first, filed by several Coast localities and two private associations representing hoteliers and the seafood industry, also calls for an EIS and other relief.

“We thank Secretary Hosemann for today’s powerful action and look forward to working with the state to protect the Mississippi Sound,” said Gerald Blessey, who heads the Mississippi Sound Coalition that includes Coast localities suing the Corps.

Repeated openings of the Bonnet Carré in recent years are without historic precedent. The spillway opened twice in 2019 for 123 days, releasing trillions of gallons of river water and causing $215 million in damage to Mississippi fisheries and the seafood industry, the lawsuit points out.

Such changed circumstances should under federal law prompt an updated EIS, the lawsuit says. Other changes the lawsuit enumerates since the last EIS, which was 43 years ago:

▪ Ecological changes to the Sound caused by Hurricane Katrina in 2005 and the BP oil catastrophe in 2010.

▪ Sediment and silt buildup that have raised the bottom of the Mississippi River.

▪ Changes to the coastline’s shape and the size of its barrier islands.

CORPS ‘WILLFULLY’ REFUSES MORGANZA OPENING

The lawsuit also points out that the Corps and MRC have “absolute discretion” to open the Morganza Floodway, where excess river flow is released into the Atchafalaya Basin. The Morganza Floodway has been opened only twice in its history, most recently in 2011, when the Bonnet Carré also opened for a prolonged period.

Mississippi officials urged the Corps to open the Morganza in 2019, but the Corps said the river did not reach the trigger point of 1.5 million cubic feet per second. The lawsuit points out that the Corps’ water control manual allows the Morganza to be opened even if the flow rate does not reach the established 1.5 million cubic feet per second.

The Corps, “without explanation, justification, or rationale, has willfully and obstinately refused to open the Morganza Spillway, which is per se arbitrary and capricious,” the lawsuit says. “Failure to do so has resulted in a 100% diversion of all floodwaters directly into the Mississippi Sound.”

Hosemann has filed the lawsuit as the steward of Mississippi’s tidelands — water bottoms subject to the tide’s ebb and flow.

The Army Corps and MRC have 60 days to respond to the lawsuit, which represents only one side of the case.

Hosemann said he will continue to support the lawsuit when he ascends to the lieutenant governor’s office. Secretary of State-elect Michael Watson of Pascagoula, currently a state senator, said he will continue to “aggressively pursue” the lawsuit when he takes office January 9.


In a News Update from the GULF COAST RESOURCE COALITION (GCRC)

The State of Mississippi, through its Secretary of State Delbert Hosemann, has filed suit against the US Army Corps of Engineers over the operation of the Bonnet Carre' Spillway and its associated severe damage to Mississippi's ecosystem and economy. Also filed was a similar lawsuit by Mississippi coastal government bodies and nonprofit organizations.

A request was made to Gulf Coast Resource Coalition to file an Amicus Brief as part of the pending lawsuits in Federal Court, and our organization - as always - will keep you updated on events as they happen.

Follow us on Twitter @ GulfCoalition

Facebook @ OurCoastOurCause


The following map shows the location of the Bonnet Carre Spillway

Bonnet Carre Spillway Location-Large


Reading the news stories written by Anita Lee at the Sun Herald, I found Hydrocoast Salinity maps from the Lake Pontchartrain Basin Foundation that show the changes in salinity in Lake Pontchartrain Basin in response to the opening and closing of the Bonnet Carre Spillway.

The Hydrocoast salinty maps are created bi-weekly and added to their catalog of maps that are downloadable from their website. So what you get every 2 weeks is the best image, depending on the weather and cloud cover for that time you are interested in.

I downloaded all the Hydrocoast salinity maps for 2019 and the first 1 for 2020 to show how the salinity regime for the Ms Gulf Gulf Coast Esutary changed in response to the opening and closing of the Bonne Carre Spillway a record 2 times in 2019. Images from the time the Bonnet Carre was closed the 2nd time on 27 July until the Jan 06 - 12, 2020 showed how the the Ms Gulf Coast Estuary slowly recovered after the 2nd spillway open and closing in 2019.

In Conclusion, The ESRI Swipe Tool is used to compare the Hydrocoast salinity image on Jan 7 -13 showing no freshwater intrusion to the Hydrocoast salinity image from 27May- 2 June, 2019.

Comments are appreciated! Please send responses to dunnygreen@gmail.com. 

JAN 7 - 13

NO BAYS OPEN

The salinity structure can be observed in the western side of Lake Pontchatrain, into Lake Borgne and the Ms. Sound.

Note the salinity structure is uniform and contours are pretty close together.

The salinity structure is seen as 3 main blue 0-5 ppt salinity valued contours in Lake Pontchartrain. These contours can also be seen in Lake Borgne, extending eastward along the Ms Coast past Bay St. Louis.

Notice how the structure of the contours in all areas are pretty close together. Later, as more Ms river fresh water is introduced from the Bonnet Carre, we can observe the salinity contours to be pushed east and northward.

Jan 21 - 27

The salinity contour structure changes in response to the record rainfall along the Mississippi north of Louisiana.

The salinity contour structure in Lake Pontchartrain are pushed eastward. Two lighter color half moon shaped areas are observed to appear as river flow enters the lake on its western north west and southwest shores.

The same change in salinity can be observed at the mouth of the Pearl River as the fresh water from the Pearl Rivers enter the western Ms. Sound.

February 4 - 10

The salinity contour structure changes in response to the record rainfall. Lake Pontchartrain salinity contours are pushed eastward.

Lake Borgne salinity contours are pushed southeastward in response to the runoff of rivers in Lake Pontchartrain.

Where the Pearl River empties into the Ms Sound, the contours are observed to spread out towards the south in response to the outflow of fresh water from record rainfall.

The Bonnet Carre Spillway bays are still closed. But we can see the salinity contour structure changes in response to record rainfall along the Mississippi valley north of Lousiana.

Feb 18 - 24

The salinity contour structures in Pontchartrain and Lake Borgne remain somewhat spead out in response to the fresh water river input into Lake Pontchartrain and the Pearl River.

The Bonnet Carre Spillway is opened on February 27th.

Feb 27th - 28 bays open

Feb 28th - 20 bays open

48 bays Total

March 4 - 10

March 1st - 40 bays open

March 2nd - 20 bays open

March 4th - 40 bays open

March 7th - 20 bays open

March 8th - 20 bays open

March 10th - 10 bays open

                  168 Total

Salinity in Lake Pontchartrain has changed with the 0.5 blue dotted contour and 1 ppt dark blue contour pushed against the north-shore shoreline by the inflow of fresh and polluted Ms riverwater from the Bonnet Carre Spillway.

The freshwater input at the mouth of the Pearl River is present can be seen from just inside Lake Borgne north along the Ms coast to about Waveland.

The 0.5 and 1 ppt salinity contour are pushed north and east in Lake Pontchartrain.

In Lake Borgne the 1 - 2 ppt salinity contours are pushed south and east against the salt marsh

At the mouth of the Pearl River the 0.5 ppt contour is pushed southeast to the of the mouth of the Pearl. It then proceeds noth and east along the Ms Coast to just beyond the eastern side of the mouth of Bay St. Louis. The 1-3 ppt contours are pushed south eastward to Half Moon Island

Further northeast the 6 ppt contour is pushed to the edge of the Biloxi Marsh.

Just east of the Bay of St Louis the contours range from 1ppt along shore to 16 ppt at Cat Island and Ship Island.

March 11th - 8 bays open              206 bays Total

Mar 18 - 24

206 Bays total open

Closing of the Bonnet Carre Spillway for the first period.

March 15th - 10 bays closed

March 26th - 20 bays closed

The freshwater outflow from the Bonnet Carre Spillway has pushed the 0.5 and 1 ppt northeast in Lake Pontchartrain.

In Lake Borgne, the freshwater inflow from Lake Ponthartrain through the Rigolets and the Pearl River has pushed the 0.5 and 2 ppt contours against the shorline north of Shell Beach.

East of the Pearl River the 0.5 - 2 ppt contour is pushed north and east past the entrance to Bay St. Louis.

Salinity contours are 5 ppt at Cat Island and 7 ppt at Ship Island.

April 01 - 07

8 April 36 bays closed

9 April 47 bays closed

11 April 18 bays closed

11 April 0 bays open

Bonnet Carre is closed for first period

15 April - No bays open

The salinity structure in Lake Pontchartrain has changed. The 0.5 dotted blue salinity contour and the 1 ppt dark blue countour are pushed by the inflow of fresh water from the Bonnet Carre Spillway to the northeast coast and a smaller area along the southeast coast west of the north point at Bayou Sauvage Wildlife Refuge inside the lake.

The Lake Borgne salinity structure is pushed eastward with a large area of fresh water holding the salinity countours to the eastern shore of Lake Borgne. 

From the mouth of thePearl River the 0.5 ppt blue dotted contour is slightly offshore just east of the mouth of Bay of St. Louis. The 1-10 ppt contours begin after the 1 -10 ppt contours increase eastward until Deer Island.

April 15 - 21

April 15 no bays open

20 April No bays open

The 0.5 - 3 ppt salinity contours are pushed against the north shore of Lake Pontchartrain by the fresh water.

Lake Borgne shows the 0.5 - 3 ppt contours pushed to the mid and south shores. The fresh water has pushed the salinity contours away from the Ms coast.

The 0.5 ppt blue dotted contour line runs from the west side of Lake Borgne passing east of Half Moon Island, ending just inside of the mouth of Bay St. Louis. The salinity contours increase to 7 ppt at Deer Island.

27 April no bays open

April 29 - May 5

Lake Pontchartrain is has no salinity! The salinity contours in Lake Borgne are pushed eastward. The 0.5 blue dotted contour and the dark blue 1 ppt contour are pushed to the middle of Lake Borgne in the south and further offshore in the Ms Sound. The fresh water has yet to reach Bay St. Louis.

7 May No bays open

10 May, 60 bays opened

11 May 10 bays opened

May 13 -19

The Bonnet Carre is opened a 2nd time in 2019

13 May 58 bays opened

138 bays total

No salinity in Lake Pontchartrain. Plumes of fresh water can be seen at the Bonnet Carre and the Tangiphoa River. In Lake Borgne the 0.5 blue dotted contour meanders from the south shore northward up the middle of Lake Borgne and crosses into the Biloxi Marsh.

138 bays total

The fresh water is now entering Bay St. Louis.

In the Ms Sound the 1ppt salinity contour exits the mouth of Bay St Louis on its east side.

The 2 - 3 ppt contours meander eastward past the Pascagoula River mouth.

The salinities at the islands range from 6-8 ppt at Cat and Ship and 15 ppt at Horn Island.14 May 10 bays opened

No salinity in Lake Pontchartrain. Plumes of fresh water can be seen at the Bonnet Carre and the Tangiphoa River. In Lake Borgne the 0.5 blue dotted contour meanders from the south shore northward up the middle of Lake Borgne and crosses into the Biloxi Marsh.

The fresh water is now entering Bay St. Louis. In the Ms Sound the 1ppt salinity contour exits the mouth of Bay St Louis on its east side.

The 2 - 3 ppt contours meander eastward past the Pascagoula River mouth.

19 May 10 bays opened

The salinities at the islands range from 6-8 ppt at Cat and Ship and 15 ppt at Horn Island.

14 May 10 bays opened

21 May 20 bays opened

The fresh water is now entering Bay St. Louis.

In the Ms Sound the 1ppt salinity contour exits the mouth of Bay St Louis on its east side.

168 bays Total

27 May - Jun 02

1 ppt salinity has moved all the way to Biloxi. Lake Pontchartrain, Lake Borgne are all filled with the fresh water from the Bonnet Carre.

The salinity contours reach from Biloxi Bay seaward to Horn Island.New plumes of fresh water are present at the Bonne Carre, and at the mouth of the Pearl River.

Smaller plumes are present in Lake Ponthchartrain at river mouths around the lake.

The Big Picture, shows all salinity pushed south and eastward. The 0.5 ppt light blue dotted contour is pushed eastward to the east coast of the Biloxi Marsh, then moving to just east of the mouth of Bay St. Louis and along the coast of Long Beach until it moves just offshore around Gulfport Harbor.

168 bays are open from 21 May until 27 July

June 10 - 16

168 bays are open

There is no salinity in Lake Pontchartrain. The 0.5 ppt blue dotted contour has been pushed eastward and southward pushed eastward and southward through the Biloxi Marsh.

The Local south/southeast wind conditions have pushed the salinity contours westward. Salinity contours are pressed against the No-salinity waters in a line from Bay St. Louis south to the Biloxi Marsh.

168 bays are open from 21 May until 22 July

June 24 - 30

There is no salinity in Lake Pontchartrain and Borgne.

The 0.5 ppt contour, represented by a blue dotted line emerges from Three Mile Bay and continues to the north east, arriving on the Ms Coast east of the mouth of the Bay of St. Louis.

The 1 ppt contour begins just eastward and incrementally to 8 ppt as it approaches Cat and Ship Island

168 bays are open from 21 May until 22 July

July 8 - 14

The salinity structure is held against the north shore of Lake Pontchartrain.

The 0.5 - salinity contours connect through the Rigolets across Lake Borgne eastward and south around the Biloxi Marsh.

Fresh water outflow from the Pearl Rivers is sourounded by the salinity structure east and west along the Ms Gulf Coast.

July 22 - 28

In Lake Pontchartrain, the 0.5ppt blue dotted contour runs from the shoreline just east of the Bonnet Carre Spillway east to the Rigolets and back west to just east of the Tangipahoa River mouth. Along the shoreline inside the 0.5 contour the 1 - 3 ppt contours may exist in some areas. A salinity high of 3 ppt exists just to the west of the Rigolets.

In Lake Borgne the 0.5 -2 ppt contours runs from the mouth of the Rigolets south alongshore about halfway down then into the center of the Biloxi Marsh.

The 1 and 2 ppt solid blue contour proceed eastward to the Bay of St. Louis. Salinity levels increase as you move offshore to 3 ppt at Half Moon Island and incrementally to 12-14 ppt at Cat Island.

At the mouth of Biloxi Bay the 10 ppt salinity contour is present, increasing to 10-12 ppt at Horn Island.

22 July 10 bays closed23 July 22 bays closed24 July 42 bays closed25 July 30 bays closed26 July 38 bays closed27 July 26 bays closed27 July 0 bays open

The Bonnet Carre Spillway is closed on 27 July for the 2nd time.

Aug 5 - Aug 11

The Bonnet Carre Spillway has been closed since 27 July. The salinity contours are moving westward as the fresh water slowly mixes with the saltier water on its east side. The mixing is accelerated by the shallow depths of the Ms Sound.

There is little salinity present in Lake Pontchartrain. The 0.5 blue dotted salinity contour is present as a high just west of the Rigolets. There is no freshwater plume at the Bonnet Carre Spillway.

Aug 19 - Aug 25

Higher salinity water moves westward along the Ms Coast and into Lake Borgne.

Lake Pontchartarin now has higher salinity contours north of the Rigolets as the 0.5 blue dotted contour and the 1-3 ppt dark blue contours are present to the west of the Rigolets.

Some fresh water is located in the southwest portion of Lake Borgne.

Along the Ms Gulf Coast the salinities range from 4-6 ppt at the mouth of the Pearl River to the mouth of the Bay of St. Louis.

Along the Ms coast, salinities increase incrementally to 16 ppt at Gulfport Harbor.

Sept 2 - 8

Led by the 0.5 ppt dotted blue contour the dark blue 1-3 ppt contours move to the west in Lake Pontchartrain.

The 0.5 light blue dotted contour holds the last area of fresh water in the southwest end of Lake Borgne.

To the east the 1 ppt dark blue contour begins about 1/2 way to the eastern shoreline of Lake Borgne and emerges out and around to the mouth of the Rigolets and the Pearl River.

Darker green 5-10 ppt Lower salinities are present along the Ms Gulf Coast, green 10-15 ppt and brighter green 15-20 ppt as you approach Cat and Ship Island.

Yellow 21-25 ppt contours move inshore between east Cat Island to Ship Island and between Ship Island and Horn Island.

The same feature is present between east Horn Island and Peti Bois Island with the yellow 20 ppt contour almost reaching the mainland shoreline.

Sept 16 - 22

Salinity in Lake Pontchartrain is mostly contained just west of the Rigolets to the west side of the1-10 Twin Span.

A smaller area of fresh water is still present in the southwest area of Lake Borgne.

Higher salinities of 4-6 ppt are located at the mouth of The Bay of St. Louis. 20 ppt contours are present at Gulf Port Harbor.

Further eastward salinities increase to 16-18 ppt at the mouth of Biloxi Bay.

Sept 30 - Oct 6

The salinity structure has set up in the eastern half of Lake Pontchartrain. The 0.5 ppt blue dotted line extends west beyond the Ponthcartrain causeway at about the midway point. And, the 1 to 4 ppt solid blue contours follow close behind.

The 1 ppt dark blue contour begins in the southwest corner of Lake Borgne and increases incrementally to 5ppt at the mouth of the Pearl Rivers.

Contours along the Ms Gulf Coast and sound are returning to normal configurations with darker green 5 - 6 ppt contours at the mouth of the Bay of St. Louis. The 10-15 ppt green contours incrementally increase along the coast and southeast to green 20 ppt contours at Cat and Ship islands. Here, yellow 20-25 ppt contours begin.

Oct 14 - 20

The Bonnet Carre Spillway has been closed since 27 July.

The Ms Sound and Lake Borgne ecosystems are retuning to their salinity configurations before the record 2 openings of the Bonnet Carre in 2019.

The 0.5 ppt blue dotted contour and the 1 - 2 ppt dark blue contour are located just west of the Pontchartrain Causeway bridge. The 5 ppt dark green contour has just moved through the Rigolets into Lake Pontchartrain.

At the western end of Lake Borgne the 2 ppt dark blue incrementally increases to 6 ppt at the mouth of the Pearl River.

dark green 5-10 ppt, green 10- 15 ppt and bright green 15-20 ppt and yellow 20-25 ppt are located from the shoreline to Cat, Ship and Horn Islands.

Yellow 20- 25 ppt and dark yellow 25-30 ppt intrusions of higher salinity are found between east Cat Island and west Ship Island. And also between east Ship Island and the west end of Horn Island. The same can be said about the east end of Horn Island and the west end of Petit Bois Island.

Oct 28 - Nov 3

The 0.5 blue dotted contour and the 1 ppt dark blue contour are west of the causeway bridge followed by the 2 - 3 ppt contours to the east.

In Lake Borgne the 2 ppt dark blue contour encompasses the southwest corner of Lake Borgne. Dark blue contours increase to 5 ppt before returning to 1 ppt at the mouth of the Pearl River.

A plume of fresh water is seen from higher rainfall in the last period.

2 - 5 ppt dark blue contours are found alongshore until the east side of the mouth of the Bay of St. Louis.

From there 5-10 ppt darker green contours transition to 10-15 ppt green contours and brighter green 15-20 contours moving offshore.

Dark green 5-10 ppt, green 10- 15 ppt and bright green 15-20 ppt and yellow 20-25 ppt are located from the shoreline to Cat, Ship and Horn Islands.

Yellow 20- 25 ppt and dark yellow 25-30 ppt intrusions of higher salinity are found between east Cat Island and west Ship Island. And also between east Ship Island and the west end of Horn Island. The same can be said about the east end o f Horn Island and the west end of Petit Bois Island.

Nov 12 - 17

Local rain events have pushed the 0.5 dotted blue contour and the dark blue 1 ppt contour eastward slightly from the last period. The 2 -3 ppt dark blue contours are no longer present in Lake Pontchartrain.

Contours in Lake Borgne are separated and pushed eastward from the runoff from the Pearl River.

The 2-5 dark blue contours are found along the coast running past the mouth of the Bay of St. Louis.

From there, the darker green 5-10 ppt contours incrementally increase to the green 10-15 ppt, brighter green 15 -20 ppt and yellow 20-25 ppt to the north and east.

Yellow 20- 25 ppt and dark yellow 25-30 ppt intrusions of higher salinity are found between east Cat Island and west Ship Island. And also between east Ship Island and the west end of Horn Island. The same can be said about the east end o f Horn Island and the west end of Petit Bois Island.

Nov 25 - Dec 1

The 0.5 dotted blue contour and the dark blue 1 ppt contour eastward slightly from the last period. The 2 -3 ppt dark blue contours are found to the east towards the Rigolets.

In Lake Borgne the 2 ppt dark blue contour begins in the south end and incrementally increases to 5-6 ppt at the northern end near the mouth of the Pearl River. Here a plume of fresh water can be seen emptying into the Ms Sound.

Eastward alongshore dark blue and dark green salinity contours range from 5-6 ppt until you reach the Bay of St. Louis.

East of Bay St. Louis salinities increase with dark green contours 5-10 ppt, green contours 10-15 ppt and bright green contours 15-20 ppt.

Yellow 20- 25 ppt and dark yellow 25-30 ppt intrusions of higher salinity are found between east Cat Island and west Ship Island. And also between east Ship Island and the west end of Horn Island. The same can be said about the east end o f Horn Island and the west end of Petit Bois Island.

Dec 09 - 15

The light blue 0.5 ppt contour and the 1-5 dark blue contours have been pushed against the north shore of Lake Pontchartrain by local southwest thunder storm winds. The dark green 6 ppt contour reaches through the Rigolets into Lake Pontchartrain from Lake Borgne.

The Big Picture is becoming closer to normal. This Saturday morning 14 Dec, Don Debuke of the Outdoor show on WWL mentioned that trout were being caught at the Causeway bridges in Lake Pontchartrain. For fishing, things are getting back to normal.


Jan 6 -12, 2020

The Hydrocoast Map – Salinity plot for Jan 06 – 12, 2020, shows fresh water plumes from the Tangipahoa in Lake Pontchartrain. The blue dotted 0.5 ppt salinity contour runs from the north shore southward just west of the Causeway twinspan soutward about ¾ the way to the southshore, then turning eastward towards the Rigolets. The solid blue 1-2 ppt contours are pushed northeast against the north shore just east of the twinspan and moving towwards and through the Rigolets.

In Lake Borgne, the 1 – 4 ppt solid blue contours begin on the western shore and end against the eastern shore of Lake Borgne.

At the mouth of the Pearl River the blue dotted 0.5 ppt salinity contour preceeds the 1- 5 ppt dark blue contours, the 5 ppt dark blue is positioned at Half Moon Island. Moving eastward, the 6 - 19 ppt green contours turn from darker green to brighter green. The yellow 21-25 ppt contours begin at Cat Island with the gold 26-30 ppt contours just offshore of Cat and running eastward just south of Ship, Horn and Peti-Bois Island.

Yellow 20- 25 ppt and dark yellow 25-30 ppt intrusions of higher salinity are found between east Cat Island and west Ship Island. And also between east Ship Island and the west end of Horn Island. The same can be said about the east end o f Horn Island and the west end of Petit Bois Island.

This is the first plot of the new year 2020. A good place to end the 2019 - 2020 Bonnet Carre Spillway Story Map.

This story map has taken us full circle. It showed salinity configuration before the opening of the Bonnet Carre.

Then it showed the change in salinity due to the opening and closing of the Bonnet Carre Spillway a record 2 times in 2019.

And, after the closing of the Bonnet Carre Spillway a 2nd time on 27 July, the Hydrocoast Salinity Maps from August to December revealed the slow transition of the Lake Pontchartrain and Ms Sound ecosystems back to normalcy.

On 30 December, 2019 Mississippi Secretary of State Delbert Hosemann sued the U.S. Army Corps of Engineers.

This lawsuit stated that he U.S. Army Corps of Engineers and Mississippi River Commission have violated federal law by failing to study the consequences of diverting Mississippi River Water into the Mississippi Sound through the Bonnet Carré Spillway.

Hosemann wants a preliminary injunction that directs the federal agencies to also open the Morganza when river flooding is a problem instead of directing all the floodwaters through the Bonnet Carré.

He also is requesting that the judge order the federal agencies to update an environmental study, called an Environmental Impact Statement, that addresses the impacts of river water on the the Mississippi Sound.

Previous studies have failed to evaluate damage to the Mississippi Sound, the lawsuits says.

After reading this, I sent a link to the Bonnet Carre Spillway Story Map to Mississippi Secretary of State Delbert Hosemann. In this email I told him to please use the Bonnet Carre Spillway Story Map to support his case against the U.S. Army Corps of Engineers.

In a thank-you email from the Secretary of State, I could see that he had cc’d state officials as well as the attorneys at Balch and Bingham of Gulfport, Ms. These were the attorneys who filed the case against the U.S. Army Corps of Engineers for Secretary Hosemann.

If, the 2019 - 2020 Bonnet Carre Spillway Story Map is useful in supporting this lawsuit it's purpose has been fullfilled.


How the opening of the Bonnet Carre Spillway

changed

The Ms Gulf Coast Ecosystem

On February 27th the Bonnet Carre Spillway was first opened in 2019. On 11April it was closed and then opened again for a record 2nd time on 10 May. It remained open until July 27th. It was open a record 107 days in 2019.

Hydrocoast Salinty maps are created every 2 weeks at the Lake Pontchartrain Basin Foundation and added to their catalog of downloadable maps in .pdf format.

Using the Swipe Tool you can compare the Hydrocoast salinity image from February 18 - 24, 2019 and the May 27- June 02, 2019. I chose the May27 - 02 June image because it showed the most influence from fresh water intrusion of the Bonnet Carre Spillway in 2019.

The comparison reveals salinity contours in the May 27 - 02June image are pushed away from the Ms Coast from the Rigolets to just past Deer Island.

The impact on Ms Gulf Coasts' ecosystem can be measured from its impact on the marine population:

BP Oil Spill - 95 dead dolphins

Bonnet Carre Spillway Opening

154 dead dolphin

and

175 dead sea turtles

Months of low salinity killed the year's oyster crop.

And,

The Human Population:

Gulf Coast's Fishermen, shrimpers and crabbers who depended on the marine environment for their livelihood

Crabbers have to work harder to catch fewer crabs.

Shrimpers have to travel farther to catch fewer shrimp.

The algae bloom, caused by the influx of polluted Mississipi River water's high phosphate content closed Mississippi's beaches.

Swimmers were not allowed in the water and beach vendors all along the cost were shut down. The economic impact of this was felt all along the Ms Gulf Coast.

Vacationers who had frequented the Ms Gulf Coast hotels and restaurants made other arrangements in other states.


Comments are appreciated! Please send comments to: dunnygreen@gmail.com.

  

French Hermit Oyster Farmers, Mike and Anita Arguelles, copied from Sun Herald article