Tenders and Proposals Registry

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RFP 2022-001 AH2 10-Year Teardown and Overhaul

Yukon Energy Corporation (YEC) has a three-unit hydro-electric generating station approximately 150 Km north-west of Whitehorse, Yukon at YEC’s Aishihik Hydro site.

The Aishihik Hydro powerhouse is an underground plant, located approximately 460 ft beneath the service building. Personnel and small equipment access to the powerhouse is via a service elevator. Larger components can be moved in and out of the powerhouse using a larger access shaft and overhead crane located in the service building.

AH2 is a Francis style, vertical shaft turbine-generator with a generator rated output of 17.28 MW originally installed in 1973. AH2 has a mechanical gate shaft governor with AH2 was last overhauled in 2012. An upstream turbine inlet valve (TIV) provides certified single device isolation. Downstream, a single vertical lift tail race gate provides certified single device isolation. YEC will be establishing and maintaining the isolation for the duration of the outage, however the Contractor may be called upon to assist with installing pumps, operating valves and monitoring water levels as required.

A ‘10-year major overhaul’ is planned for the outage window approximately from July 4, 2022 – September 26, 2022. YEC is dependent on generation from AH2 during the fall and winter and as such, strict adherence to this outage window is required in scheduling overhaul activities. The goal of the major overhaul is to correct known deficiencies and refresh unit components to ensure 10 years of trouble-free operation.

YEC is requesting proposals from qualified vendors to perform the overhaul site works and work with YEC and YEC representatives (owner’s engineer) to perform remedial works to correct known operational issues with the AH2 unit. YEC will reference the most recent CEATI Mechanical Overhaul Guide for Hydroelectric Turbine-Generator Units and the CEATI Hydroelectric Turbine-Generator Units Guide for Erection Tolerances and Shaft System Alignment during the site works to ensure work is done in conformance with industry standards. ASME/CSA/IEEE/ASTM standards will be used as reference where applicable. YEC expects the qualified Contractor, at a minimum, to perform all required checks, refurbishments and respect as-left unit tolerance recommendations (if appropriate) during reassembly per applicable CEATI guidelines.

The solicitation package can be accessed here.

RFP 2021-027 Transmission Line Brushing L177 & L178

The Corporation is seeking Contractor(s) to brush along transmission lines L177 (Stewart Crossing North Substation to Callison Substation) and L178 (Carmacks Substation to Faro Substation).

Transmission line brushing is essential to ensure the Corporation’s assets are accessible and continue to function in a safe and reliable state. The Corporation is seeking Proposals from qualified Proponents for the vegetation brushing of the L177 and L178 transmission line(s).

The Work will include the supply of all labour, equipment, and materials required to perform the brushing as detailed below. Proponents may bid on one (1) or two (2) of pieces of Work. 

The solicitation package can be accessed here.