From: on behalf of Panel Registry Subject: FW: TNG registration of ...

HCRP are not given. However, the bottom will slope upward, toward
the east, from the three-section containment dyke. Will soil
bioengineering or other measures be used to control erosion by
wind and waves around the HCRP?
The HCRP is to be filled each spring, by the end of May or
early June (Fig. 8-8, Section 8, Compensation Plan), and gradually
emptied, starting in April (the start date in April not given, but
outflow and inflow will overlap for part of April and all of May),
proceeding through the summer months, and ramping down to nil
by September 15. During the latter part of this storage and release
period, i.e. July 1 to September 15, the water in the HCRP will be
particularly vulnerable to excess warming.
The documents reviewed do not provide adequate information
on and analysis of the thermal characteristics of the water to be
released from the HCRP. This information will be particularly
important during the latter part of the spawning and rearing period.
5
Spawning and Rearing Channel
The compensation plan does not indicate what the water
temperatures will be in the spawning and rearing channel during the
period, late July to September. During this period, water already
warm from its time in the HCRP, will warm further during its
movement through the riffles and alcoves in the spawning/rearing
channel. The project documents do not present data on temperature
patterns, that will occur during the operation of the channel. This
does not allow full evaluation of temperature effects on fish in the
channel. This is another area of unknowns and potential risk.
The matter that is important, in considering the former three
interdependent components, is that each and all must function in
order that the compensation system works. The quality of function
and the likelihood of failure is an artifact of the complexity of the
system. It will be a challenge to achieve success. Where the
environmental issues are important, and where there is serious
public concern about a project, compensation must be more than