Area of Critical Environmental Concern

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Faded signage for the Jawbone-Butterbredt ACEC in the Mojave Desert Jawbone-Butterbredt Area of Critical Environmental Concern signs near SR178 2016-04-05.jpg
Faded signage for the Jawbone-Butterbredt ACEC in the Mojave Desert

Areas of Critical Environmental Concern (ACEC) is a conservation ecology program in the Western United States, managed by the Bureau of Land Management (BLM). The ACEC program was conceived in the 1976 Federal Lands Policy and Management Act (FLPMA), which established the first conservation ecology mandate for the BLM. The FLPMA mandate directs the BLM to protect important riparian corridors, threatened and endangered species habitats, cultural and archeological resources, as well as unique scenic landscapes that the agency assesses as in need of special management attention.



To be considered a potential ACEC an area must meet criteria of both relevance and importance. [1]


An area meets the relevance criteria of an ACEC if it contains one or more of the following:


An area meets the importance criteria if it is characterized by one or more of the following:

Designated ACECs



[3] [4]



[10] [11]



Climbers in Humbug Spires WSA Humbug Spires WSA (9469767136).jpg
Climbers in Humbug Spires WSA

(For more detailed descriptions of the following sites see) [14]

New Mexico







See also

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  1. BLM Manual 1613, Areas of Critical Environmental Concern, section 1613.1.11
  3. Arizona Strip Proposed Plan/FEIS, 2007. Chapter 3: Affected Environment, Areas of Critical Concern. Bureau of Land Management. (Accessed 2012-01-30)
  4. Yuma Field Office Record of Decision and Approved Resource Management Plan
  5. . accessed 2016-10-03.
  7. . accessed 2016-10-03.
  8. "Archived copy". Archived from the original on 2010-12-21. Retrieved 2010-06-26.CS1 maint: archived copy as title (link) . accessed 2010-06-22.
  9. . accessed 2016-10-03.
  10. "Areas of Critical Environmental Concern". United States. Bureau of Land Management. Retrieved 2019-04-30.
  11. The actual list is in an Excel file here.
  12. 1 2 3 4 "Draft Evaluation of Proposed and Existing Areas of Critical Environmental Concern for the Uncompahgre Planning Area" (PDF). United States Department of the Interior, Bureau of Land Management. June 2010. Retrieved October 22, 2012.
  13. 1 2 3 4 "BLM Colorado: Land Use Planning - Areas of Critical Environmental Concern". United States Department of the Interior, Bureau of Land Management. August 12, 2008. Archived from the original on May 30, 2010. Retrieved October 22, 2012.
  14. Bureau of Land Management Montana/Dakotas. "ACEC Status Report" . Retrieved 2012-01-01.
  15. Northern Plains Conservation Network. "Bitter Creek/Grasslands National Park". Archived from the original on 2012-01-29. Retrieved 2012-01-01.
  16. The Conservation Fund. "Saving Montana's Meeteetse Spires". Archived from the original on 2011-11-21. Retrieved 2012-01-01.
  17. Community Celebrates Expansion of La Cienega ACEC Archived September 22, 2008, at the Wayback Machine , United States Department of the Interior, Bureau of Land Management, Press Release dated 2007-08-23, accessed 2008-07-06.
  18. "ACEC Existing - Coos Bay Oregon/Washington BLM". Retrieved 2016-04-15.
  19. "Welcome to the Table Rocks Oregon/Washington BLM". Retrieved 2016-04-15.
  20. 1 2 Draft Oil Shale and Tar Sands Resource Management Plan Amendments to Address Land Use Allocations in Colorado, Utah, and Wyoming and Programmatic Environmental Impact Statement, Volume 1 Archived May 12, 2009, at the Wayback Machine , United States Department of the Interior, Bureau of Land Management, dated December 2007, accessed 2008-04-22.