While
each river and dam situation has its own unique set of characteristics,
there are strong similarities in the questions that tend to arise. For
your dam and community, be prepared to address the top ten most common
concerns raised in communities considering dam removal. Questions are
not necessarily in order of importance.
1. "Won't the river turn into a trickle of water that a person could jump across?"
An
easy way to predict the river's width and flow after a dam removal is
to look at the river 1) before it reaches the impoundment and 2) just
downstream of the dam. Unless the geology or topography changes
substantially in the restored stretch of the river, it is highly
unlikely that the restored river segment will be significantly wider or
narrower than already found at these portions of the river.
2. "Won't we have more flooding problems?"
This
is a legitimate concern only if the dam technically provides flood
control. Most small dams do not. If, according to qualified personnel,
the dam does not provide flood control, this needs to be explained to
the community. (Explaining how one dam provides flood control but
another dam does not can be a difficult idea to get across; see Chapter
2, Know the Dam for more information about the difference between a
run-of-river dam and a flood control dam.) Many dams actually increase
the risk of flooding, due to serious disrepair and/or misoperation
during storm events.
3. "Won't we be left with stinking mud flats?"
When
the impoundment is drawn down during dam removal sediments will
be exposed. Depending on the time of year and type of sediments,
there may be an odor of decomposing silt and vegetation for a short
period of time (typically ranging from a few days to a few weeks).
Years of experience show that these newly exposed lands will revegetate
(green up) within weeks during warm weather, thanks to the many plant
seeds that have accumulated in the rich sediment over the years. Once
exposed to sunlight and oxygen the plants grow very quickly and the
sediments dry up in the process. Of course, if the exposed land is
subject to dense shade, tidal action or other significant water level
fluctuations, this area may not revegetate as much or as quickly.
4. "Who will own the new land?"
Dam
removal usually results in exposing land that was previously
underwater. Land ownership questions can usually be answered by
referring to deeds and titles for the waterfront properties and the dam
property. Failing to address this concern early in the process can
unnecessarily cause alarm in the community. Avoid this problem by
answering the question of land ownership as early as possible.
5. "Won't wildlife habitat be lost causing wildlife to suffer?"
The
habitat created by the dam will change with dam removal. Consult your
state natural resources agency for site-specific information and
predicted changes. Historical records can sometimes provide a good
indicator of what the restored habitat might look like. Healthy rivers
are the lifeblood of healthy wildlife habitats. Dams alter the natural
physical, biological and chemical functions of rivers. This results in
degraded conditions for a variety of aquatic and terrestrial species.
For instance, the Wisconsin Department of Natural Resources has
identified dams as one of the biggest threats to aquatic biodiversity
in Wisconsin.
6. "Will property values plummet?"
This
is usually a factor when there are private homes on the impoundment. Of
course, this is a very site-specific issue, but there are several cases
where predicted decreases in property value never occurred. River
Alliance is funding a Univeristy study to more carefully examine this
question in Wisconsin. Because this impact is best measured over time
and has several variables involved (e.g., real estate market, location
in state, characteristics of the property), it is best to look at
property values at other former dam sites with similar community
attributes. These could be in your state or elsewhere.
7. "Who will pay for the dam removal?"
This
varies with the site. Sometimes the dam owner pays (e.g., an
individual, taxpayers, a business). Sometimes private funds are
acquired. Some states also provide funding for dam removal. One of the
most effective ways to promote dam removal is to help identify funds
for the removal. Consult your state dam safety official for information
specific to your community and situation. Helping people in your
community to understand the costs associated with both keeping and
removing the dam can be among your most valuable efforts. Understand
what is not included in most cost estimates. If professional estimates
have not been made you will need to find a way to gather them. See our
funding page for more information on that process.
8. "Doesn't the dam have historical value?"
This
points out the need to look cumulatively at the dam's impacts to
determine whether it has a true historical value that is greater than
the environmental value of restoring the river. Historical issues can
become a significant issue, especially if they arise near the end of
the decision-making process. With the vast number of dams in many
states and across the country, very few are considered true historic
sites. At some dam removal sites, communities honor a dam's past
contributions with interpretive displays and other information. If
historical issues are likely to become an issue, early involvement of
your states historical preservation office is recommended.
9. "Won't the dam removal introduce exotic or diseased species?"
Dams
sometimes act as barriers, protecting upstream areas from invading
species. This is a site-specific issue that needs to be addressed by
the appropriate state or federal natural resource agency. In many cases
mitigation measures have been designed to restrict unwanted species.
10. "Won't the best fishing spots will be lost if the dam is removed?"
Often
anglers like to fish right below the dam and oppose removal because
they feel they will lose a good fishing opportunity. But the fish
aren't there because its good habitat, they're usually stacked up
trying to get upstream. Dam removal improves the health of the river
and aquatic habitat, usually to such an extent that local anglers can
look forward to improved angling opportunities along a much longer
stretch of river. In some cases, removing a dam will restore a
warmwater fishery to a more rare coldwater fishery that supports trout
or salmon. In many cases, dam removal will allow a wider variety of
warmwater, coolwater and coldwater species to seasonally occupy the
same stretch of river, thus providing greater fishing variety.