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Final Supplemental Environmental Assessment and Finding of No Significant Impact for the Proposed High-Water Crossing, Tucson Sector, Arizona (May 2021)

Document Posting Date: 
April 14, 2021

U.S. Customs and Border Protection (CBP) announces the availability of the Final Supplemental Environmental Assessment (SEA) and Finding of No Significant Impact (FONSI) for the Proposed High-Water Crossing in the Casa Grande Station's Area of Responsibility, Tucson Sector, Arizona.  The Final SEA and FONSI analyze the potential environmental and socioeconomic impacts associated with the construction, maintenance, and repair of a high water crossing through Vamori Wash. This SEA supplements the Final EA and FONSI for Integrated Fixed Towers on the Tohono O’odham Nation in the Ajo and Casa Grande Stations’ Areas of Responsibility, U.S. Border Patrol, Tucson Sector, Arizona, approved March 28, 2017. 
 
CBP provided the Draft SEA and FONSI for a 30-day comment period between April 17 and May 17, 2021.  The notice of availability for the draft SEA was published in the Tohono O’odham Nation’s The Runner, Ajo Copper News, and Arizona Daily Star newspapers. 


Based on the findings of the SEA, and after careful review of the potential environmental impacts of implementing the proposed action, CBP finds there would be no significant impact on the quality of the human or natural environment. Therefore, preparation of an environmental impact statement is not required and a FONSI has been issued.

Last modified: 
May 28, 2021