Los Alamos Field Office NEPA Documents

NEPA Documents

Below are links that provide NEPA documents which govern the Los Alamos National Laboratory operational envelope. This website is organized into three categories: Environmental Impact Statements (EIS), which includes Supplemental Analysis (SA); Environmental Assessments (EA) and Categorical Exclusions (CX). Under each of these sections, you will find a list of documents organized by document number, which is linked to an electronic version of the document for the reader's review. The document title, a brief summary of the document content, and the decision regarding the document are provided for each document number.

As LASO undertakes NEPA activities, project-specific websites will be used to communicate with the public regarding the NEPA process and activities. You will find active project-specific websites here and as new documents are developed and completed, they will be posted on this website for future reference. Please check this website periodically for updates and new information. For additional nationwide NEPA information, please visit the DOE NEPA Website. For additional information from LANL regarding environmental stewardship, protection, sustainability, cleanup, and the public electronic reading room, please visit the LANL Environmental page.

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Environmental Impact Statements (EISs)

LANL Site-wide EIS (SWEIS)

Document TypeDocument NumberTitleDecisionSummary
EISDOE/EIS-0380Site-Wide Environmental Impact Statement for Continued Operation of Los Alamos National Laboratory (2008 LANL SWEIS), May 2008ROD 1: September 2008 (73 FR 55833)

ROD 2: July 2009 (74 FR 33232)

Modification issued to ROD 2 for DOE/EIS-0380-SA-02
The Site-Wide EIS evaluates the continued operation of the Los Alamos National Laboratory (LANL). NNSA identified and assessed three alternatives for continued operation of LANL: (1) No Action, (2) Reduced Operations, and (3) Expanded Operations.
MAPDOE/EIS-0380-MAPARAnnual Report on the Mitigation Action Plan for the 2008 LANL SWEIS

FY2009 MAPAR (October 2009)

FY2010 MAPAR (October 2010)

FY2011 MAPAR (April 2012)

FY2012 MAPAR (March 2013)

FY2013 MAPAR (January 2014)

This document is an annualized report that summarizes the mitigation activities conducted in each fiscal year that were part of the implementation of the RODs of the 2008 LANL SWEIS. The MAP for the 2008 LANL SWEIS is a living document and is updated as needed to integrate mitigation action plans from completed NEPA activities into one document. The Trails MAP, DAHRT MAP and SEA for Heritage Resources are incorporated as appendices to the 2008 SWEIS MAP. The 2008 SWEIS MAPAR is used to consolidate reporting on all mitigation action activities completed by DOE/NNSA and LANL.
EIS-SADOE/EIS-0380-SA-02Supplement Analysis for the Transport and Storage of High-Activity Sealed Sources from Uruguay and Other Locations, 2011Mod to 2008 LANL SWEIS ROD 2 July 2011 (76 FR 40352)This document contains the analysis for the Off-Site Source Recovery Project (OSRP) that was not addressed in the LANL SWEIS and examines the role of a commercial facility in managing these sealed sources. As a supplement analysis, it is tiered off the analysis in the 2008 LANL SWEIS.
EIS-SADOE/EIS-0380-SA-01Supplement Analysis for the Proposed Transport of Low Level Radioactive Waste by Truck and Rail from LANL for Disposal at EnergySolutions at Clive, Utah, October 2009Approved: October 2009 (Determination included in document)This document contains the analysis for the transportation of Low Specific Activity (LSA) and Low Level Waste (LLW) by a combination of truck and rail to Energy Solutions in Clive, Utah. As a supplement analysis, it is tiered off the analysis in the 2008 LANL SWEIS.

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CMRR EIS and Supplemental Analysis (SA)

Document TypeDocument NumberTitleDecisionSummary
EISDOE/EIS-0350Chemistry and Metallurgy Research Replacement Building Project at LANL, Los Alamos, New Mexico, November 2003ROD: February 2004 (69 FR 6967)This EIS evaluates the continued operation of the Chemistry and Metallurgy Research (CMR) Building at Los Alamos National Laboratory (LANL). This project is proposed to construct new structures at Technical Area 55 (TA-55). This project would not alter the purpose of mission of the CMR.
SEISDOE/EIS-0350-S1Final Supplemental Environmental Impact Statement for the Nuclear Facility Portion of the Chemistry and Metallurgy Research Building Replacement Project at Los Alamos National Laboratory, Los Alamos, New Mexico, August 2011ROD: October 2011 (76 FR 64344)
MAP: November 2011
This document contains the analysis completed to supplement the analysis that was completed and disclosed in the in the 2004 CMRR EIS. The SEIS was completed due to proposed changes to the structure of the facility. The work performed in the facility was not proposed for alteration or change. The MAP will be integrated into the 2008 LANL SWEIS MAP in FY13.
EIS-SADOE/EIS-0350-SA-01Supplement Analysis, EIS for the Chemistry and Metallurgy Research Building Replacement (CMRR) Project at LANL, New Mexico, January 2005SA Not Approved; determination was to support an EIS analysis.This supplemental analysis was completed to determine if the EIS for the CMRR Building Project at LANL adequately addressed the potential environmental effects of changes proposed in the location of components that were selected for implementation in the ROD completed in 2004. This supplemental analysis compared two different locations for a variety of the structures planned for construction including laboratory space, utilities support, a connection tunnel, and a small access control station with all other aspects of the facilities remaining the same. This alteration was necessary in part due to security requirements. The SA concluded that the actions proposed and assessed in this document are adequately bounded by the CMRR Building Project EIS that was completed in 2004.
EIS-SADOE/EIS-0350-SA-2Chemistry and Metallurgy Research Building Replacement Project at Los Alamos National Laboratory, January 2015 

To meet mission requirements, the DOE/NNSA proposes to relocate analytical chemistry (AC) and materials characterization (MC) capabilities at Los Alamos National Laboratory (LANL) from the Chemistry and Metallurgy Research (CMR) Building to other existing LANL facilities.  Relocation of AC and MC capabilities from the CMR Building was evaluated in the Final Environmental Impact Statement for the Chemistry and Metallurgy Research Building Replacement Project at Los Alamos National Laboratory, Los Alamos, New Mexico (DOE/EIS-0350) (CMRR EIS).  DOE/NNSA now proposes changes that have become viable for relocating AC and MC capabilities at LANL since publication of the CMRR EIS.  This Supplement Analysis evaluates whether the proposed changes would represent a substantial change relevant to environmental concerns or whether new circumstances or information relevant to environmental concerns and bearing on the proposed action or its impacts are significant. 

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Documents Related to the 1999 LANL SWEIS

Document TypeDocument NumberTitleDecisionSummary
EIS-SADOE/EIS-0238-SA-05Proposed Expansion of Restricted Airspace, September 2004Approved: September 2004 (Determination included in document)This SA to the 1999 SWEIS was completed to adequately address the environmental affects of modifying the horizontal restricted airspace boundaries at LANL in New Mexico. The airspace above portions of Technical Areas 33 and 54 (TA-33 and -54) needed to be revised in response to a revised threat analysis resulting from September 11, 2001. Though the airspace expansion request was made there was no request to change operations within the two TAs. The DOE determined that the expansion of airspace would be within the capabilities analyzed in the 1999 SWEIS.

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Other EISs and SAs

Document TypeDocument NumberTitleDecisionSummary
EA-SA DOE/EA-1212-SA-01Final Supplement Analysis for teh Environmental Assessment for the Lease of Land for the Development of a Research Park at Los Alamos National Laboratory 

The purpose and need for this SA is to support a determination by DOE/National Nuclear Security Administration (NNSA) as to whether the analysis in the 1997 EA is sufficient to support a lease modification to remove the restriction on the use and storage of radioactive material specifically for the Samitaur proposal, or whether additional National Environmental Policy Act (NEPA) documentation would be required.

EISDOE/EIS-0388Operation of a Biosafety Level 3 Facility at the Los Alamos National Laboratory, NM (LANL BSL-3 EIS)This document is still in draft form.This document analyzes the impacts associated with operating a biosafety level 3 (BSL-3) laboratory at LANL. The EIS evaluates three actions: (1) Proposed action: Operation of a the Facility at BSL-1, -2 and -3; (2) Alternative 1: Operation of the Facility as a BSL-1 and BSL-2; and (3) No Action: No change in the current use of the Facility.
EISDOE/EIS-0293Conveyance and Transfer of Certain Land Tracts Administered by the U.S. Department of Energy and Located at LANL, Los Alamos and Santa Fe Counties, New Mexico, October 1999ROD 1: March 2000 (65 FR 14952)

ROD 2: July 2002 (67 FR 45495)

ROD 3: August 2005 (70 FR 48378)

ROD 4: January 2012 (77 FR 3157)
This document analyzes the impacts associated with conveyance and transfer of lands from DOE at LANL. In compliance with the Departments of Commerce, Justice, and State, the Judiciary, and Related Agencies Appropriations Act, 1998 ("the Act"), which directs the DOE to convey or transfer parcels of DOE lands in the vicinity of LANL to the incorporated county of Los Alamos and the Secretary of the Interior, in trust for the Pueblo of San Ildefonso; however, such lands must not be required to meet the national security mission of the DOE. LANL identified 10 tracts of land as potentially suitable for conveyance and transfer.
EISDOE/EIS-0228Dual Axis Radiographic Hydrodynamic Test Facility, August 1995ROD: October 1995 (60 FR 53588)

MAP:October 2006
This EIS evaluates the proposed Dual Axis Radiographic Hydrodynamic Test (DARHT) facility at Los Alamos National Laboratory (LANL) in northern New Mexico. The DARHT EIS analyzed six alternative ways to implement DOE's proposed action to obtain enhanced radiographic capability. The MAP is incorporated into the 2008 LANL SWEIS.

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EISs Affecting LANL Completed by Other Programs

Greater Than Class C (GTCC) EIS

Document TypeDocument NumberTitleDecisionSummary
EISDOE/EIS-0375Draft Environmental Impact Statement for the Disposal of Greater-Than-Class C (GTCC)Low-Level Radioactive Waste and GTCC-Like WasteThis document is still in draft form. Additional information is available on the project website. The Draft document for Public Comment was issued on February 25, 2011. The public comment period closed on June 27, 2011. The document is currently in the comment response phase of the NEPA process.The GTCC EIS evaluates potential impacts from the construction and operation of a new facility or facilities, or use of an existing facility, employing various disposal methods (geologic repository, intermediate depth borehole, enhanced near surface trench, and above grade vault) at six federal sites and generic commercial locations. The sites evaluated in the EIS are WIPP, the Hanford Site, Idaho National Laboratory, Los Alamos National Laboratory, Nevada National Security Site, Savannah River Site, and WIPP vicinity. The GTCC EIS also evaluates the long-term safety and stability of the conceptual disposal facilities after waste has been emplaced and the facility permanently closed. DOE does not have a preferred alternative but does include LANL in its analysis.

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Surplus Plutonium Disposition Supplemental EIS

Document TypeDocument NumberTitleDecisionSummary
EISDOE/EIS-0283Surplus Plutonium Disposition, 1999ROD 1: January 2000 (65 FR 1608)

ROD 2: April 2002 (67 FR 19432)

ROD 3: April 2003 (68 FR 20134)

ROD 4: November 2003 (68 FR 64611)

ROD 5: December 2008 (73 FR 75088
This EIS is specific to the disposition of plutonium that was determined to exist as excess for national security needs of the DOE. The purpose of the project is to reduce the threat offered by nuclear weapons proliferation in the United States (and Russia). This EIS evaluates the potential affects of disposition of the materials that exists at seven locations within the DOE complex: the Hanford Site near Richland, WA; Idaho National Engineering and Environmental Laboratory near Idaho Falls, ID; Lawrence Livermore National Laboratory in Lawrence, CA; Las Alamos National Laboratory near Los Alamos, NM; the Pantex Plant (Pantex) near Amarillo, TX; the Rocky Flat Environmental Technology Site near Golden, CO; and the Savannah River Site near Aiken, SC.
EISDOE/EIS-0283-S2Draft Surplus Plutonium Disposition Supplemental Environmental Impact Statement (SPD SEIS), July 2012Additional information is available on the project website. The Draft document for Public Comment was issued on July 27, 2012. The public comment period closed on October 10, 2012. The document is currently in the comment response phase of the NEPA process.This SEIS analyzes five alternatives: (1) the No Action Alternative; (2) the Immobilization to DWPF Alternative - glass can-in-canister immobilization of both surplus non-pit and disassembled and converted pit plutonium and subsequent filling of the canister with high-level radioactive waste (HLW) at DWPF at SRS; (3) MOX Fuel Alternative - fabrication of the disassembled and converted pit plutonium and much of the non-pit plutonium into MOX fuel at MFFF, for use in domestic commercial nuclear power reactors to generate electricity, and disposition of the surplus non-pit plutonium that is not suitable for MFFF as transuranic waste at the existing Waste Isolation Pilot Plant (WIPP), a geologic repository in southeastern New Mexico; (4) H-Canyon/HB-Line to DWPF Alternative - processing the surplus non-pit plutonium in the existing H-Canyon/HB-Line at SRS with subsequent disposal as HLW (i.e. vitrification in the existing DWPF) , and non-pit plutonium fabrication of the pit plutonium into MOX fuel at MFFF; and (5) WIPP Alternative - processing the surplus non-pit plutonium in the existing H-Canyon/HB-Line for disposal as transuranic waste at WIPP, and fabrication of the pit plutonium into MOX fuel at MFFF. Included in all alternatives, DOE would also disposition as MOX fuel, 34 metric tons (MT) of surplus plutonium in accordance with previous decisions.

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Environmental Assessments (EAs)

Document TypeDocument NumberTitleDecisionSummary
EADOE/EA-1247Electrical Power System UpgradesFONSI: March 2000This EA evaluated the environmental effects for the proposal to upgrade the electrical power supply system for the LANL to increase the reliability of the system to meet then current and future needs.
EADOE/EA-1250Strategic Computing ComplexFONSI: December 1998This EA evaluated the environmental effects for the proposal to construct and operate the Strategic Computing Complex (SCC) within the LANL Technical Area-3 (TA-03). The purpose of constructing the SCC was to support the Stockpile Stewardship and Management (SSM) Program through the integration of computer processors capable of performing high volume computations. For the purposes of analysis it was assumed that the SCC was planned to be a 267,000 square foot building designed to be occupied by up to 300 employees on a daily basis. Other construction activities were assumed to include the expansion of parking areas, and the use of local utilities.
EADOE/EA-1329Wildfire Reduction and Forest Health Improvement ProgramFONSI: August 2000

FONSI: May 2001

FONSI: October 2004
This EA evaluated the implementation of a Wildfire Hazard Reduction and Forest Health Improvement Program at the LANL. The Proposed Action (the No Burn Alternative) did not propose the use of fire as a treatment measure. The ecosystem-based management program would initially be composed of a series of individual, small-scale projects using mechanical and manual thinning methods that would be conducted over about 10 years with ongoing, long-term maintenance projects conducted thereafter. An estimated 35 percent, approximately 10,000 ac (4,000 ha), of the LANL were to be treated under this program using forest thinning and the construction of access roads and fuel breaks as treatment measures. Wood materials generated by the treatment measures were to be either donated or salvaged; waste wood materials (slash) were to be primarily disposed of through chipping and used as mulch on-site.
EADOE/EA-1364Construction and Operation of a Biological Safety Level 3 FacilityFONSI: February 2002This EA evaluated the potential environmental impacts of a proposal to construct an approximately 3,000 square foot, one-story permanent facility which included two BSL-3 laboratories with adjoining individual mechanical rooms separated by a central support BSL-2 laboratory; clothes-change and shower rooms; and associated office spaces.
EADOE/EA-1375Construction and Operation of a New Office Building and Related Structures within TA-3FONSI: July 2001This EA analyzed the environmental consequences associated with construction and operation of a new facility to support programmatic, management, and support functions essential to the overall LANL operations and nuclear weapons work performed for the DOE and the NNSA at Technical area (TA) 3. The existing building (TA-3-43) had many identified structural, systemic, and security problems associated with it.
EADOE/EA-1376Construction and Operation of New Interagency Emergency Operations CenterFONSI: July 2001This EA evaluated the potential environmental impacts of a proposal to construct and operate an Interagency Emergency Operations Center (Center) at Technical Area 69 (TA-69.) The new Center would include a 30,000-square-foot (2,700-square-meter) facility, a garage, a 130-car parking lot, and a 150-foot (45-meter) tall fire suppression water storage tank with antenna attachments on about a 5-acre (2-hectare) site. The design of the proposed center was a state-of-the-art multi-use facility housing about 30 fulltime University of California and Los Alamos County (or their contractor) staff.
EADOE/EA-1408Future Disposition of Certain Cerro Grande Fire Flood and Sediment Retention StructuresFONSI: August 2002This EA was prepared to analyze the environmental consequences that resulted from the disposition of certain flood retention structures built in the wake of the Cerro Grande Fire within the boundaries of LANL. Due to hydrophobic soils (non-permeable soil areas created as a result of very high temperatures often associated with wild fires) and the loss of vegetation from steep canyon sides caused by the fire, surface runoff and soil erosion on hillsides above LANL were greatly increased over prefire levels. The danger to LANL facilities and structures and homes located down-canyon from the burned area was magnified.
EADOE/EA-1429Proposed Access Control and Traffic Improvements, August 2002FONSI: December 2002This EA evaluates impacts associated with restricting vehicular access to certain areas within LANL for the purpose of permanently enhancing the physical security environment at LANL. It has also identified the need to change certain traffic flow patterns for the purpose of enhancing physical safety at LANL. The Proposed Action would include the construction of eastern and western bypass roads around the LANL Technical Area 3 (TA-3) area and the installation of vehicle access controls and related improvements to enhance security along Pajarito Road and in the LANL core area. The Proposed Action modified the current roadway network and traffic patterns.
EADOE/EA-1431LANL Proposed Trails Management Program (Trails EA), August 2003

FONSI: September 2003
MAP: September 2003

This document evaluates the permissible uses of trails within the LANL in order to facilitate the establishment of a safe, viable network of linked trails across the Pajarito Plateau that traverses land holdings of various private and government etitities for recreational use and for alternative purposes (such as riding bikes to and from residences and worksites). The MAP is incorporated into the 2008 LANL SWEIS MAP as an Appendix.
EADOE/EA-1464Proposed Corrective Measures at Material Disposal Area H within Technical Area 54 at LANL, Los Alamos, New Mexico, June 2004FONSI: June 2004This EA evaluated the historical management of radioactive and hazardous wastes that have been generated as a result of mission support activities at LANL. As a result of historical disposal practices, the wastes disposed within shafts at Material Disposal Area (MDA) H have been identified as potentially having a future adverse effect on human health and the environment. The corrective measures to mitigate the potential hazards in MDA H are analyzed in this EA.
EADOE/EA-1515Proposed Closure of the Airport Landfills within TA-73, May 2005FONSI: May 2005This EA evaluates the corrective measures needed for the NNSA to meet the requirements for remediation of the landfills identified on the Airport Landfills Tract prior to their conveyance.
EADOE/EA-1736Expansion of the Sanitary Effluent Reclamation Facility and Environmental Restoration of Reach S-2 of Sandia Canyon at LANL (SERF EA), August 2010FONSI: April 2010

MAP: August 2010
This EA considered two separate actions, the expansion of the Sanitary Effluent Reclamation Facility (SERF) and environmental restoration activities located within a portion of upper Sandia Canyon, designated as reach S-2. The two separate actions considered in this document also received separate decisions. The MAP is incorporated into the 2008 LANL SWEIS MAP as an Appendix.

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Categorical Exclusions (CXs)

Document TypeDocument NumberTitleDecisionSummary

Domestic Source Recovery – FY 2015

Approved: December 2, 2014This project proposed to recover up to 4000 domestic actinide and non-actinide sealed sources in FY 15.

Foreign Location Source Recovery-FY 2015


Approved: December 2, 2014This project proposes to recover up to 1,500 U.S.-origin actinide and non-actinide sources from foreign locations in FY 15.
 CX n/a

Foreign Location Source Recovery-FY 2014


Approved: December 16, 2013

This project proposes to recover up to 1,400 U.S.-origin actinide and non-actinide sources from foreign locations in FY 14.

 CX n/a

Domestic Source Recovery – FY 2014


Approved: December 16, 2013 

This project proposed to recover up to 4000 domestic actinide and non-actinide sealed sources in FY 14.


Lease Extension for the Operation of a Telecommunications Tower at Los Alamos Laboratory

Approved: February 9, 2015The proposed action is to renew an existing lease with SBA Structures, Inc. to operate and maintain telecommunications equipment (wireless, cellular, and/or radio services) at a tower located at the intersection of State Road 4 and Pajarito Road.

Biosafety Level-2 (BSL-2) Laboratory in Building 3-216

Approved: Dec. 16, 2013This project would develop a biological detection system to identify and quantify microorganisms for an organization leading in supply of detection technologies to the United States and international pharmaceutical firms.
CXn/aWell Pump Tests Phase II in Sandia and Mortandad CanyonsApproved: May 19, 2014Project consists of measures to reduce migration of contaminated groundwater in Sandia and Mortandad Canyons at Los Alamos National Laboratory.
CXn/aForeign Location Source Recovery- FY 2013Approved: November 2012The DOE/NNSA's Off-Site Recovery Project (OSRP), managed at LANL, proposes to recover up to 1,400 U.S.-origin actinide and non-actinide sealed sources from foreign locations in Fiscal Year (FY) 2013.
CXn/aStorm Water Control Measures at Individual Permit Site, TA-72Approved: November 2012DOE/NNSA proposes to implement engineered storm water control measures at Technical Area (TA) 72, Sandia Watershed Site Monitoring Area 6 (S-SMA-6), at Los Alamos National Laboratory (LANL). Storm water controls would be designed and installed to meet the requirements of National Pollutant Discharge Elimination System (NPDES) Permit No. NM0030759, commonly referred to as the LANL Individual Storm Water Permit (IP).
CXn/aDomestic Source Recovery- FY 2013Approved: November 2012The DOE/NNSA's Off-Site Recovery Project (OSRP), managed at LANL, proposes to recover up to 4,000 domestic actinide and non-actinide sealed sources in Fiscal Year (FY) 2013.
CXn/aDomestic Source Recovery- FY 2012Approved: April 2012The DOE/NNSA's OSRP, managed at LANL, proposes to recover up to 1,500 domestic actinide and non-actinide sealed sources in the second half of FY2012.
CXn/aConstruction of Interagency Fire Center at TA-49Approved: January 2012The Los Alamos Field Office (LASO) proposes to approve construction of a new, single-story multipurpose interagency fire center at TA-49. The building would contain about 6,400 square feet of offices, training and conference rooms and about 200 square feet of storage for fire protection/suppression equipment.
CXn/aOperation of the CLEAR Line at TA-55-4Approved: May 2011The Chloride Extraction and Acid Recovery (CLEAR) glovebox line at TA-55-4 was proposed as an addition to the existing EXCEL hydrochloric acid recovery line, to remove actinide from process effluent that would be treated at the Radioactive Liquid Waste Treatment Facility (RLWTF).
CXn/aConstruction of Protective Force Indoor Live Fire Range at TA-16Approved: February 2011The proposed indoor live fire range would be approximately 18,000 square feet and house a 50-meter, 20-erson firing range suitable for all pistol and rifle calibers currently in use or required by the LANL protective force.
CXn/aReplacement of Los Alamos Neutron Science Center (LANSCE) Operational EquipmentApproved: December 2010As part of the LANSCE Risk Mitigation Project, LANL proposes to refurbish critical operating programmatic equipment at the LANSCE facility at TA-53.
CXn/aPajarito Road Right-of-Way Shift at TA-50 and TA-55Approved: April 2010LANL proposes to shift a segment of Pajarito Road slightly to the south along the edge of Two-Mile Canyon in the vicinity of TA-55.
CXn/aPhotovoltaic Array Reuse of Los Alamos County Landfill LocationApproved: March 2010In an effort to beneficially reuse the LANL TA-61 'Brownfield' landfill site, the County is proposing to lease and use approximately 15 acres of the 46 acres of land it operated as a landfill for the installation of up to 2.5 mega watt of photovoltaics to generate electric power.
CXn/aFuels Research Lab at TA-35-455Approved: June 2010LANL proposes to modify an existing laboratory at TA-35, Building 455, Room 104, for a Fuels Research Lab to be used to fabricate and characterize fuel pellets.
CXn/aConstruction of Grade Control Structures in Pueblo and DP CanyonsApproved: October 2009

LANL proposes to install grade control structures in Pueblo and DP Canyons to reduce flow velocities and peak discharge during flood events and reduce erosion of contaminated deposits downstream of these structures.


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