Military Aviation and Installation Assurance Siting Clearinghouse, Office of the Assistant Secretary of Defense for Sustainment

Military Aviation and Installation Assurance Siting Clearinghouse Reviews

Mission Compatibility Evaluation Process

The DoD has a structured process for developers to request a mission compatibility evaluation of a proposed energy project, as documented in Part 211 of Title 32 CFR.

Some states have incorporated notifying DoD about proposed energy projects into their requirements. The Electrical Reliability Council of Texas (ERCOT) is one example. PGRR047 FIS Department of Defense Declaration, passed in 2016, requires entities to notify the Clearinghouse of a proposed energy project and request an informal or formal review before submitting to ERCOT for a full interconnection study (FIS).

In accordance with 10 U.S. Code ยง 183a (c)(6), if an energy project proposed is known to be inside a military training route or in a radar surveillance line-of-sight that the DoD owns or operates in, then the project must be filed at least one year prior to construction.

Formal Review

The Clearinghouse formal review process applies to projects filed with the Secretary of Transportation, under Title 49 U.S.C., Section 44718 (Federal Aviation Administration obstruction evaluation process) and addresses all energy projects greater than 199 feet above ground level, proposed for construction within military training routes or special use airspace, whether on private, state, or Federal property, such as the Bureau of Land Management lands.

Calendar Year Formal Review
2011 (Partial Year) 502
2012 1,769
2013 2,075
2014 2,594
2015 3,325
2016 4,208
2017 4,224
2018 5,658
2019 5,141

Informal Review

The Clearinghouse encourages all energy proponents to seek informal reviews as early as possible to identify potential compatibility concerns. Developers of an energy project; a landowner; a State, Indian tribal, or local official; or other Federal agency should request a preliminary determination from the Clearinghouse in advance of filing an application with the Secretary of Transportation under Title 49 U.S.C., Section 44718 or where a preliminary DoD determination is desired.

Calendar Year Informal Review
2011 (Partial Year) No data
2012 86
2013 60
2014 27
2015 39
2016 122
2017 138
2018 171
2019 226

To request an informal review, please send the following information to the Clearinghouse at

  • Contact Information
  • Company/Vendor/Developer
  • Project Point of Contact First and Last Name
  • Address, City, State, and Zip code
  • Phone Number, Fax, and E-mail
  • Project Name and Nearest City or County and State
    • The geographic location of the project, including latitude and longitude. Please include Lats/Longs in DMS (Degrees, Minutes, Seconds) for each turbine tower in Excel format and a map of the project in PowerPoint or Adobe pdf format, if possible.
    • The nature of the project (e.g., wind, solar) and the following information:
      • Number of Structures
      • Wind Turbine:
        • Turbine Type
        • Hub Height
        • Blade Tip Height
        • Turbine Farm Layout
      • Solar:
        • Solar Tower or Panel Height
        • Solar Layout
        • Solar Array Acreage (with map)
      • Geothermal:
        • Geothermal Layout/Acreage (with map)
      • Transmission, Utility, and Power Lines:
        • Height and Type of Structure(s)
        • Substation(s) Tie-in (if known)
        • KV of Line(s)
        • Map of Route
  • BLM ID, NEPA number, or any Federal/State/Local identifiers, if applicable
  • Provide as much additional information as possible, such as:
    • Associated transmission/lines for project and obstructions to structure (guideline supports, lighting)
    • Intended grid connection with location (DMS)
    • Shapefile for project (Lats/Longs in DMS and decimals)

If the request for an informal review includes information that is proprietary or competition sensitive, we encourage that the documents be marked accordingly. Documents must be marked as "Proprietary" or "Business Sensitive" to ensure they are properly safeguarded upon receipt. Do not mark documents as "Confidential," as that can be easily mistaken for a national security classification. Properly marked proprietary information will be protected under exemption to the Freedom of Information Act and will only be used to assess potential impacts on military missions.

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