Cornerstone Chemical Company, LLC

• WARN notice effective JUL 31, 2025 · 71 employees · filed MAY 5, 2025 — recorded; it does not change the status

Notices filed with the state under the federal WARN Act, as the state publishes them, collected by the WARN Act notices feed (CC BY 4.0). A notice records what the employer told the state; it is not by itself proof that the plant closed.

What they make

• intermediate chemicals
• Military
• sulfuric acid
• environmental protection programs
• employee wellness assessments
• operational excellence and safety
• flat-screen TVs
• household countertops
• high-quality products

NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026

Open positions

Openings read from Cornerstone Chemical Company, LLC’s own job board on ADP, last checked OCT 28, 2026. FactoryRegistry does not host applications — each title opens the posting where the company published it.

• Production Engineer
  Waggaman, LA, US · posted OCT 23, 2026
• Project Coordinator
  Waggaman, LA, US · posted OCT 8, 2026
• Instrumentation and Electrical (I/E) Technician
  Waggaman, LA, US · posted AUG 27, 2026
• Strategic Engagement and Communications Manager
  Waggaman, LA, US · posted AUG 13, 2026

Where it is

Other plants nearby

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CRCross Road Centers Transportation LLC	Kenner	Other Paperboard Container Manufacturing 322219	◐ LIKELY ACTIVE	2.5 KM
RRRiver Ridge Terminal	River Ridge	Other Paperboard Container Manufacturing 322219	◇ UNVERIFIED	3.8 KM
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Every listed plant in Jefferson County

Also at this address

1 other record shares this street address. Separate filings can describe distinct businesses on one site, or the same plant recorded by different agencies, so every record is kept rather than merged away.

Where this record comes from

6 sources hold this plant, and 12 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

EPA cross-references this facility in AIR, AIRS/AFS, BR, CEDRI, E-GGRT, EIS, ICIS, LA-TEMPO, NCDB, NPDES, OSHA-OIS, RCRAINFO, TRIS, TSCA · EPA site type STATIONARY.

• The company’s own websiteOPERATING
  first seen JUL 2026 · last seen OCT 2026
• EPA Facility Registry ServiceEXISTENCE
  Record 110049249075 · first seen FEB 2026 · last seen JUL 2026
• SAM.gov entity registrationOPERATING
  Record TAKSX2K3GRY8 · first seen JAN 2026 · last seen JAN 2026
• State WARN plant-closing and layoff noticesEXISTENCE
  first seen JUL 2025 · last seen JUL 2025
• EPA Toxics Release InventoryOPERATING
  first seen DEC 2024 · last seen DEC 2024
• DOL Form 5500 retirement plan filingsOPERATING
  Record 273966965|LA|70094|10800 river rd · first seen DEC 2024 · last seen DEC 2024

ALSO RECORDED ASCORNERSTONE CHEMICAL CO LLC

IN JEFFERSON COUNTY10 other plants share this one’s industry (Converted Paper Product Manufacturing, NAICS 3222); 0 of them have a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

NameSOURCES DISAGREE

EPA: CORNERSTONE CHEMICAL CO LLC · JUL 2026

SAM.gov: CORNERSTONE CHEMICAL COMPANY, LLC · JAN 2026 · ON THIS PAGE

Street address

EPA: 10800 RIVER RD · JUL 2026 · ON THIS PAGE

SAM.gov: 10800 RIVER RD · JAN 2026 · ON THIS PAGE

City

EPA: WAGGAMAN · JUL 2026 · ON THIS PAGE

SAM.gov: WAGGAMAN · JAN 2026 · ON THIS PAGE

State

EPA: LA · JUL 2026 · ON THIS PAGE

SAM.gov: LA · JAN 2026 · ON THIS PAGE

County (FIPS code)

EPA: 22051 · SEP 2026

Coordinates

EPA: 29.958889,-90.270472 · JUL 2026

Employees (band)

DOL: 100-499 · DEC 2024

Website

SAM.gov: www.cornerstonechemco.com · JAN 2026

CAGE code

SAM.gov: 9UVB0 · JAN 2026

Retirement plan filing (Form 5500)

DOL: 456 active participants, plan year ending 2024-12-31, 3 plan(s) · DEC 2024

SAM registration expires

SAM.gov: 2027-01-29 · JAN 2026

State business registration

TX Comptroller: CORNERSTONE CHEMICAL COMPANY, registered with the Texas Comptroller of Public Accounts; Corporation; revoked