Tyson Valley Powder Farm

(Site Profile/Docket Number 143)

Location: St. Louis, Missouri

Special Exposure Cohort Petition Information

The Special Exposure Cohort (SEC) is a unique category of employees established by the Act (42 CFR Part 83). Claims compensated under the SEC do not have to go through the dose reconstruction process. To qualify for compensation under the SEC, a covered employee must meet specific requirements (e.g., must have at least one of 22 “specified cancers,” and have worked for a specified time period at one of the SEC sites). Classes of employees and work sites can be considered for addition to the SEC through a NIOSH petition process. More information about the Special Exposure Cohort can be found on our Frequently Asked Questions page.

Open/Active SEC Petitions

To date, there are no open/active SEC petitions from Tyson Valley Powder Farm.

Class(es) Added to the SEC

  • All Atomic Weapons Employer (AWE) employees who worked at Tyson Valley Powder Farm near Eureka, Missouri, from February 13, 1946 through June 30, 1948, for a number of work days aggregating at least 250 work days, occurring either solely under this employment or in combination with work days within the parameters established for one or more other classes of employees in the SEC.

    Note: This class was established from Petition 115

Petitions Qualified for Evaluation

Below is a list of the petitions that qualified for evaluation. Select a petition on the list to view the table for that particular petition.

Petition 115
Steps in Petition Process: Petition Details:

Date Received

June 13, 2008

Date Qualified for Evaluation

August 4, 2008

Summary of Information in Petition

Location: St. Louis, Missouri

Job Titles and/or Job Duties: All employees

Period of Employment: January 1, 1942 through December 31, 1949

Note: The information above is what qualified for evaluation. During our evaluation of whether dose reconstructions can adequately be completed for the above job titles and period of employment, information may cause NIOSH to change some the dates or job titles/duties. Therefore, as this petition proceeds through the SEC petition process and if an SEC class is proposed, the proposed class may not exactly match the above information.

Copy of the Petition Received

June 13, 2008 Cdc-pdf[56 KB (2 pages)]

Federal Register Notice Announcing that a Revere Copper and Brass SEC Petition has met the Minimum Qualifications for Review and Evaluation

August 15, 2008 Cdc-pdf[56 KB (2 pages)]

SEC Petition Evaluation Report

Revised March 2, 2009 Cdc-pdf[200 KB (37 pages)]

Evaluation Report Sent to the Advisory Board

February 3, 2009

Petition Discussed by the Advisory Board

The petition was discussed by the Advisory Board on February 18, 2009, during its regular meeting.

Note: the agenda and transcripts from this meeting are available on the Advisory Board and Public Meetings page.

Advisory Board Recommendation on SEC Petition

March 3, 2009 Cdc-pdf[49 KB (2 pages)]

HHS Letters to Congress Regarding the SEC Petition

March 31, 2009 Cdc-pdf[154 KB (9 pages)]

HHS Designation of Additional Members to the SEC


Federal Register Notice: Designation Regarding a Class of Employees for Addition to the Special Exposure Cohort


Note: A “designation” will be published if there is a recommendation to add a class to the SEC. A “determination” will be published if there is a recommendation not to add a class to the SEC.

Effective Date for the SEC Class

April 30, 2009

Federal Register Notice: Final Effect of Determination of a Class of Employees for Addition to the Special Exposure Cohort

May 8, 2009 Cdc-pdf[43 KB (1 page)]

Letter to DOL Regarding the Addition of a New Class of Employees to the SEC

April 30, 2009 Cdc-pdf[16 KB (1 page)]

Public Comments on Tyson Valley Powder Farm Documents

How to Submit Comments

Comments on Tyson Valley Powder Farm Documents can be submitted to the NIOSH Docket Officer electronically by email at nioshdocket@cdc.gov or printed comments can be mailed to:

NIOSH Docket Office
Robert A. Taft Laboratories, MS-C34
1090 Tusculum Avenue
Cincinnati, OH 45226
Please include the Site Profile/Docket Number (143) on all comments.

Comments Received

At this time, no comments have been submitted on Tyson Valley Powder Farm documents.

Document Archive for Tyson Valley Powder Farm

Page last reviewed: September 28, 2015