Iowa Ordnance Plant-Line 1 and Associated Activities Information

The Iowa Ordnance Plant (IOP), also known as the Iowa Army Ammunition Plant (IAAP), is a load, assemble, and pack munitions facility that began production in 1941 and continues to operate as a Government-owned, contractor-operated installation. Between 1947 and 1974, a portion of the IAAP was operated under contract to the Atomic Energy Commission (AEC) for the purpose of supplying the AEC with explosive components for nuclear weapons. The area of the IOP that performed work for the AEC includes the buildings and property/grounds of the IAAP that is identified as Line 1, as well as Yards C, G and L and the Firing Site Area, Burning Field “B” and the storage sites for pits and weapons, including Buildings 73 and 77. Work performed in these areas is covered under the Energy Employees Occupational Illness Compensation Program Act. In 1974, the AEC closed out its activities at the plant and transferred all functions to the Pantex Plant.

Throughout the course of its operations, the potential for beryllium exposure existed at this site, due to beryllium use, residual contamination, and decontamination activities.

Alternative Names

• Burlington Ordnance Plant
• Silas Mason Company
• Mason & Hanger
• Iowa Army Ammunition Plant

Type of Facility

• Department of Energy

Covered by EEOICPA

• Part B and Part E

EEOICPA Covered Years

• 1947-1974

Contractors

• Mason & Hanger-Silas Mason Company (1947-1974)

Army Corps of Engineers

•  FUSRAP Information

DOE

• DOE Facility List by Name
• Considered Site

DOL

• Tracking your DOL Claim Status
• Advisory Board on Toxic Substances and Worker Health
• Ombudsman’s Office
• Resource Center
• DOL Case and Claim Statistics
• Site Exposure Matrix
• Approved Special Exposure Cohorts
• Bulletin 05-06: Processing Claims for Iowa Army Ammunition Plant SEC Class, 1949 – 1974
• Circular 07-03:This Circular replaces Circular No. 07-01, DOE facility description of Line 1 (Division B) at the Iowa Ordnance Plant, with one correction

NIOSH

• FAQs About Your Case
• Advisory Board on Radiation and Worker Health
• NIOSH Case Statistics
• Special Exposure Cohort Status Table
  • Petitions 006, 007, 014, 015: “Employees of the Department of Energy (DOE) or DOE contractors or subcontractors employed by the Iowa Army Ammunition Plant, Line 1, during the period from March 1949 through 1974 and who were employed for a number of work days aggregating at least 250 work days either solely under this employment or in combination with work days within the parameters (excluding aggregate work day requirements) established for other classes of employees included in the SEC.”
  • Petitions 006, 007, 014, 015: “
    Department of Energy (DOE) employees or DOE contractor or subcontractor employees who worked as radiographers from May 1948 to March 1949 in support of Line 1 operations at the Iowa Army Ammunition Plant and who were employed for a number of work days aggregating at least 250 work days either solely under this employment or in combination with work days within the parameters (excluding aggregate work day requirements) established for other classes of employees included in the SEC.”
• Work Site Information

Other Resources

• BTComp Contractor/Subcontractor Database
• Waste Lands-America’s Forgotten Nuclear Legacy Database