Letter to Batavia Aldermen
2-26-03
In June of 2002 I spoke with you prior to the City Council’s vote on the
recommendation for the removal of the North Batavia Dam. I attended the
joint City Council and Park District Board meeting where you voted for the
removal of the dam. I thank you for that vote, as I believe it was the most
economical and environmental choice available.
I
have served on the Citizens Advisory Committee for the Dam Removal project
since that time, and have enjoyed the opportunity to provide input on the
restoration efforts that will follow removal of the dam.
As you know, Batavians will have a chance on April 1 to cast an advisory
vote on the removal of the North Batavia Dam. I hope in your conversations
with constituents and friends that you will relate the reasons why you voted
to recommend removal of the dam last August. Following are a few points that
may be helpful to discuss with voters who may not be familiar with the facts
of the dam project:
1. Leaving
the dam ‘as is’, or repairing at the current location, are not options.
The dam is unsafe, both structurally and hydraulically. The current dam
configuration causes scouring and erosion downstream of the immediate dam
site. If the dam were repaired to correct for the scour issue, it would
result in a dangerous ‘roller’ which would be a threat to human safety.
Other modifications to the current dam (building on the current dam with a
‘stepped design’ or ‘rock ramp’ to provide fish and recreational passage
as required of any new or modified dams under current law) are not
possible because they would increase the flood profile downstream.
All options presented by the Illinois Department of Natural Resources (IDNR)
in 2002, therefore, involved complete
replacement
or removal
of the current dam. The
replacement option called for a new dam structure to be built nine hundred
(900) feet upstream of the current dam with large boulders set into the
river to create a mild whitewater section between the new dam and the
current dam location. Clearly, those proponents of ‘keeping things as they
are’ do not understand that under any scenario possible, the face of the
river will change.
2.
The
upfront costs to replace or remove the dam are virtually the same.
According to IDNR’s “Alternative Evaluation Report, Replacement of Upper
Batavia Dam, Kane County, Illinois”, the cost to replace the dam is $8.3
million (Alternative 1), and the cost to remove the dam (Alternative 4) is
$8.8 million.
Some citizens are citing the cost to repair the dam ($1.9 million) as proof
that the dam should not be removed. Again, note that
repair is not an option
– see above.
3.
Complete removal is the only financially long-term, sustainable solution.
The construction of a half-height dam will commit City of Batavia and State
of Illinois residents to long-term maintenance, engineering, and
construction funding requirements. The current life expectancy of a new dam
structure is 50-100 years, and maintenance may be expected to begin just 20
years after construction. If a new dam is constructed, the IDNR will require
the City of Batavia to maintain the structure for a minimum of 50 years.
Therefore, if a new dam is constructed, future Batavia and Illinois
residents will be burdened with not only the time and energy to complete the
same decision making process as the new structure degrades, but also the
funds to maintain and ultimately reconstruct or remove the new structure.
Additionally, under any dam replacement scenario, the City of
Batavia would continue to face the need to
dredge Depot Pond every 20 years. Consultants for the Illinois Department of
Natural Resources estimate that the next round of dredging will cost $1
million. Complete dam removal and the construction of a berm to close off
Depot Pond will eliminate the need to dredge the pond.
4.
The
post-removal river will be aesthetically pleasing
The river will
not ‘dry up’ - McLaughlin
Water Engineers, IDNR’s consultants on the dam replacement study, estimate
that after removal of the dam, the river will be 200-400 feet across at bank
full flows, compared with 600 feet across currently.
The banks will
not be dominated by ‘mudflats’
– $2.7 million is currently budget for
channel restoration under Option 4 (complete removal). Channel restoration
will include dryland seeding, landscaping, and all necessary sediment
management and stabilization. Landcape restoration was of high importance to
all members of the Citizens Advisory Committee, and IDNR has assured the
committee of its commitment to proper restoration. Additionally, attractive
limestone banks are likely to emerge upon removal, based on McLaughlin’s
recent channel surveys.
Once again, I hope you
will pass on this information to residents in our Ward who are seeking
information on this referendum. I appreciate the time and effort the city
invested in this project for the last few years, and hope the decision the
Council made last fall will be supported by residents again this spring.
Please feel free to call or email with any questions or comments. Enclosed
for your reference is the letter I sent last summer before the Council’s
vote.
Sincerely,
Karen Kosky, Batavia |