2026-06394NoticeWallet

Alaska Coast Guard Dock May Disturb Local Sea Mammals

Published Date: 4/2/2026

Notice

Summary

The U.S. Coast Guard wants to change its plan for building a new fast response cutter homeport in Sitka, Alaska, which might disturb some local marine mammals. These changes affect how long the project lasts, how it’s designed, and how many animals might be impacted. The public can share their thoughts by April 17, 2026, before the final decision is made.

Analyzed Economic Effects

3 provisions identified: 2 benefits, 1 costs, 0 mixed.

New PSO and Monitoring Requirements

Construction at Moorings Sitka must employ three to six protected species observers (PSOs). Monitoring must occur from 30 minutes before pile driving or DTH begins through 30 minutes after it ends, and soft-start procedures (an initial set of three reduced-energy strikes, a 30-second wait, then two reduced-energy strike sets) are required for impact pile driving.

Requested Smaller Shutdown Zones

The U.S. Coast Guard requested reducing the minimum shutdown zone from 30 meters to 10 meters for all activities because two seafood processing plants about 210 m and 450 m away attract pinnipeds and could cause construction delays and shutdowns. The USCG also proposed land-based PSOs for DTH activities instead of vessel-based PSOs.

Project Days and One-Year Authorization

Pile removal and installation at Moorings Sitka would occur for approximately 113 non-consecutive days. The modified incidental harassment authorization would be valid for the statutory maximum of 1 year from the date it becomes effective.

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Key Dates

Published Date
Comments Due
Effective Date
4/2/2026
4/17/2026
9/1/2026

Department and Agencies

Department
Independent Agency
Agency
Commerce Department
National Oceanic and Atmospheric Administration
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