Peace Project Water Use Plan - BC Hydro

Peace Project Water Use Plan
Annual Report: 2010
5.1.12.3 Status
The riprap slope protecting the bridge abutment has lost several rocks, although the
remainder of sections of the slope and the exposed geotextile are in good condition.
Signs posted at the site indicate that the boat launch is currently closed. Discussions
with Joan Dickinson, a relatively regular visitor to the site, indicated that the boat
launch is closed because of concrete debris on the ramp. More generally, she and
her family have indicated that the concrete ramp is in poor condition. Ripples in the
water over the ramp support the presence of debris over the ramp.
A sandy track runs east from the boat launch site. During the site visit, this track
terminated in the water. However, during more normal water levels it appears that
the track reconnects to the main park road forming a loop. Mrs. Dickinson indicated
that the logjam, visible in varies in extent according to recent flows but often extends
most of the way to the bridge.
Based on the headway made by the survey vessel, the current in the river was
estimated at approximately 2.5 m/sec (4.9 kts) during the site visit.
Due to the flat topography and shallow water east of the site in the area no suitable
boat launch areas were found in the park downstream of the site.
Additionally, the logjam would form a barrier to boat access when it is in a relatively
large configuration. Similarly, no suitable areas were observed upstream, and it
would be undesirable for park users to be required to cross over Clayhurst Road to
use the ramp.
Consequently, no alternative sites were investigated in detail.
The existing site has many advantages:
� Easy access from Clayhurst Road;
� The existing access road is in good condition;
� There is sufficient water depth for year-round launch;
� There is good upland infrastructure in Blackfoot Regional Park; and,
� If desired, there is ample space to increase parking at the boat launch ramp.
The main disadvantage of the site appears to be occasional high currents, which
have damaged the riprap slope. The concrete boat launch ramp may have suffered
direct damage from falling and tumbling riprap or other debris; it may also have
suffered indirect damage from scour caused by the high currents. However, both of
these problems can be overcome through appropriate engineering of the riprap,
ramp, and scour protection.
This project is complete.
5.1.13 GMSWORKS#14 – Williston Air Photos and DEM
Order clause: Schedule A 3(d)
BC Hydro Project Manager: Karen Skibo
BC Hydro Page 34