Sulphur Mines Investigation

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This page was updated on 07/18/2024 at 9:26:51 AM.

Subsidence Reports

Operators of salt caverns in Louisiana submit yearly subsidence reports to LDENR as a compliance requirement by the state. As part of an enhanced program to monitor ground subsidence at Sulphur Mines, Westlake was ordered by LDENR to provide more frequent updates and reports since January 2023.

The method used is InSAR, which employs satellites to approximate relative ground movement over time. Currently, one satellite (SNT) provides data every 12 days, and one satellite constellation (TSX/PAZ) provides data every 4 and 7 days, respectively. 

2023 Annual InSAR Survey of Ground Displacement and Subsidence Monitoring Report - received April 30, 2024

2022 Annual InSAR Survey of Ground Displacement and Subsidence Monitoring Report - received April 21, 2023

TRE-Altimara Response Regarded Reprocessing of Data and New Baseline - received January 29, 2024

Status Update (memo) - received July 1, 2024

2023

2024

2023

(Updates began 4/7/2023)

April 7, 2023
April 19, 2023
May 1, 2023
May 13, 2023
May 25, 2023
June 6, 2023
June 18, 2023
June 30, 2023
July 12, 2023
July 24, 2023
August 5, 2023
August 17, 2023
August 29, 2023
September 10, 2023
September 22, 2023 - No data received from satellite (statement)
October 4, 2023
October 16, 2023
October 28, 2023
November 9, 2023 - No data received from satellite (statement)
November 21, 2023 - Data issues (statement)
November 21, 2023
December 3, 2023
December 15, 2023

2024

January 25, 2024
February 1, 2024 - No data received from satellite (statement)
February 13, 2024
February 25, 2024
March 8, 2024 - No data received from satellite (statement)
March 20, 2024 
April 1, 2024 
April 13, 2024 
April 25, 2024 
May 19, 2024 
May 31, 2024  
June 12, 2024 
June 24, 2024 - No data received from satellite (statement)
July 6, 2024