Los Alamos Historic Document Retrieval & Assesment

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The Los Alamos Historical Document Retrieval and Assessment (LAHDRA) Project is assembling pieces of Los Alamos National Laboratory's history to evaluate releases of materials that had the potential to cause off-site health hazards.

The Centers for Disease Control and Prevention (CDC) is conducting this project to systematically review all available documents related to Los Alamos National Laboratory (LANL) operations and identify records that contribute information about releases of chemicals and radionuclides from the site between 1943 and the present. Scientists from ChemRisk, contractor to CDC, are performing the document retrieval and assessment. The project team has access to LANL records that is unprecedented for an independent group studying potential off-site health hazards. Products of the project include:

bullet summary of historical operations
bullet listing and ranking of materials released off site
bullet bibliographic database of relevant documents and interviews
bullet copies of those documents made available in a local reading room



CDC’s December 2010 Letter to the U.S. Department of Energy regarding the LAHDRA Project

Final Report of the Los Alamos Document Retrieval and Assessment (LAHDRA) Project (PDF File - 45MB)

Community Summary of the Los Alamos Document Retrieval and Assessment (LAHDRA) Project (PDF File - 5MB)

Resumen Para La Communidad - Recopilación y Evaluación de los Documentos Históricos de Los Álamos, Para el CDC (PDF File - 5MB)


Please join us for the final Los Alamos Historical Document Retrieval and Assessment (LAHDRA) project public meetings. The purpose of the meetings is for CDC to present its recommendations to the Department of Energy as a result of the final LAHDRA report.

  • Wednesday, December 8, 2010 5-7 PM
    Rio Grande Ballroom at the Santa Claran Hotel;
    464 North Riverside Drive, Espanola, NM
  • Thursday, December 9, 2010 5-7 PM
    Tularosa Community Center;
    1050 Bookout Road, Tularosa, NM


Comments that have been received regarding the draft final report of the LAHDRA project are now available for your review.

Click here to view the comments that have been received.

Options for follow-up work include:

  • Finalize this report and stop
  • Proceed to some form of more detailed dose reconstruction
    -For all releases and locations identified in this report
    -For selected releases and locations identified in this report


CDC logo and link ChemRisk logo and link
Shonka Research Associates logo and link Advanced Technologies and Laboratories International, Inc. logo and link
ENSR logo and link

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For more information contact Matt Le