The Detour Canyon project layout includes an approximately 72 m dam with a spillway control structure, a fish ladder, a water intake, conveyance, a 3-unit powerhouse with 2 additional turbine generator bays for post 2065 upgrades, trailrace structures, and diversions to facilitate de-watering of the dam site during construction.
Costs are preliminary and are based on Class 5 engineering estimates.
They are used here to compare the relative costs of each site.
3.1 Detour Canyon [PELLY-PELLY-0567-B]
Detour Canyon is a potential hydroelectric project on the Pelly River, located in the Pelly River Basin approximately 85 km downstream (northwest) of Faro. The total drainage area is estimated to be 28,500 km2. The major components of the preliminary project layout are listed in Table 10. The project components are shown in Figure 8 and described in more detail as per sections listed in Table 10.
Table 10: Detour Canyon Major Project Components
9 – At this stage of study, upstream fish passage is expected to be facilitated via fish ladder. During subsequent phases of development, different alternatives may be considered including, but not limited to, mechanical lifts or trap-load-haul operations. Downstream fish passage is expected to be facilitated through fish friendly turbines (e.g. Kaplan Turbine).
10 – The transmission line is not shown on the drawing but is expected to follow approximately the access road from the switchyard to the interconnection point.
Figure 8: Detour Canyon Layout