Federal Register - June 29, 2021
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Source: Federal Register
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Federal Register / Vol. 86, No. 122 / Tuesday, June 29, 2021 / Notices
Dates and Duration
lotter on DSK11XQN23PROD with NOTICES1
The applicant is requesting an IHA to conduct pile driving/removal and DTH
over two months approximately 26
working days beginning in August 2021. Pile installation and removal will be intermittent during this period, depending on weather, construction and mechanical delays, protected species shutdowns, and other potential delays and logistical constraints. Pile installation will occur intermittently during the work period, for durations of minutes to hours at a time.
Approximately 18 days of pile installation and 8 days of pile removal will occur using vibratory and impact pile driving and some DTH to stabilize the piles. These are discussed in further detail below. The total construction duration accounts for the time required to mobilize materials and resources and construct the project.
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Specific Geographic Region The proposed project in Metlakatla is located approximately 24 kilometers km 15 miles mi south of Ketchikan, in Southeast Alaska. Metlakatla, is on Annette Island, in the Prince of WhalesHyder Census Area of Southeast Alaska.
The Metlakatla Seaplane Facility is centrally located in the village of Metlakatla on the south shore of Port Chester Figure 1 within Section 5, Township 78 South, Range 92 East of the Copper River Meridian; United States Geological Survey Quad Map Ketchikan A5; Latitude 55750.30
North, 1313428.08 West.
Port Chester is a bay located on the east shore of Nichols Passage and on the west side of Annette Island. Port Chester contains numerous small islands and reefs. The bay is one of many that lead to a larger system of glacial fjords connecting various channels with the open ocean via Nichols Passage,
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Clarence Strait, and Dixon Entrance.
Port Chester is generally characterized by semidiurnal tides with mean tidal ranges of more than 5 meters m 16
feet ft. Freshwater inputs to Port Chester originate from Trout Lake, Melanson Lake, Chester Lake, and other minor drainages from Annette Island.
Three anadromous streams terminate in Port Chester: Hemlock Creek, Trout Lake Creek, and an unnamed creek that originates from Melanson Lake Giefer and Blossom 2020. The bathymetry of the bay is variable depending on location and proximity to shore, islands, or rocks. Depths approach 107 to 122 m 350 to 400 ft on the west side of the bay near Nichols Passage. Nichols Passage is a wide and deep channel that runs between Gravina Island and Annette Island. Depths can exceed 305
m 1,000 ft towards the south end of the channel.
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