The U.S. Environmental Protection Agency (USEPA) published their notice of availability of the SURTASS LFA Final SEIS/SOEIS on July 7, 2017 (82 FR 129: 31597) (EIS No. 20170121).
On August 26, 2016, the Navy published a Notice of Availability (NOA) in the Federal Register of the Draft Supplemental Environmental Impact Statement/Supplemental Overseas Environmental Impact Statement (DSEIS/SOEIS) for the employment of SURTASS LFA sonar. The NOA can be downloaded here and the DSEIS/SOEIS can be downloaded here. The 45-day public comment period ran until October 11, 2016.