Alaska Online Public Notices #ADL 109506

Installation of Outfall Pipeline (Outfall 002A) at Greens Creek Mine, Alaska

This opportunity concerns the installation of a new outfall pipeline (Outfall 002A) at the Greens Creek Mine, near Juneau, Alaska, to support treated water discharge from the mine's water treatment plant. - Government Buyer: - Alaska Department of Natural Resources, Division of Mining, Land and Water (DMLW), Southeast Regional Office - Primary OEMs and Vendors: - Hecla Greens Creek Mining Company (mining operations) - Morrison Maierle (engineering firm for project plans) - Products and Equipment Requested: - Approximately 5,565 linear feet of 14-inch HDPE DR-17 pipe (fused and bolted) - 8 units of 6-inch Tideflex diffuser valves - 1 unit of 10-inch V-port ball valve - 8 units of 6-inch HDPE DR-17 flange adapters with stainless steel back-up rings - 2 units of 10-inch carbon steel ASME 150# weld neck flanges - Additional pipeline fittings: reducers, bends, tees, branch saddles, inspection ports, flow meter, and ballast weights - Services Requested: - Mobilization and demobilization of equipment and personnel - General project requirements and indirect costs - Unique or Notable Requirements: - Installation on state-owned tidelands and submerged lands at Hawk Inlet, Admiralty Island - Use of heavy equipment (e.g., CAT340/CAT350 excavators, support barge) - Protection of existing utilities and infrastructure - Use of rig mats for equipment travel - Compliance with environmental and permitting stipulations - Project area covers approximately 1.40 acres - Easement term requested for 15 years

Description

The Alaska Department of Natural Resources has received an application from Hecla Greens Creek Mining Company for the installation and maintenance of a new outfall pipeline (Outfall 002A) at Hawk Inlet near Juneau, Alaska. The project involves installing approximately 4,062 feet of 14-inch HDPE pipe on state-owned tidelands and submerged lands to transfer treated water from mining operations to a permitted discharge location. The installation will use heavy equipment including excavators and a support barge, and the requested easement term is 15 years. Public comments are invited until May 6, 2026.

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