17. Economic Analysis
• Avoid road and culvert damage repair costs following storms
• Improve fishing watershed‐wide due to improved fish passage
• Avoid private property damage
• Improve safety
• Utilize outside sources of funding
• Atlantic Salmon Federation
• Nature Conservancy
• NOAA
Source: BDN
300,000 Alewives
returned to
Blackman’s Stream
in 2015
18. Conclusions
• Fish passage and stream connectivity at stream crossings are
necessary due to the advantages that in provides environmentally,
societally and economically. It is well said by McKay (2013) that
stream connectivity is “of particular importance to mobile, aquatic
[organisms] such as fish, which serve not only as economically,
socially and culturally important species, but also ecologically
important species that alter large-scale ecosystem processes”
• Each passage site must be analyzed on an individual basis to
determine what type of passage structure will best fit the particular
stream (Bunt, 2012).
19. Conclusions (cont)
• Stream connectivity can be an economically
viable with proper planning and life cycle
analysis.
• A variety of bridge and culvert designs can
cause stream connectivity issues, but, in
general, most bridge designs do not create a
barrier for fish.
Alewife
20. Recommendations
• Any potential stream connectivity issue should be approached
proactively, to avoid situations such as the one in the summer of 2014
where DOT had to make a temporary solution in the middle of a fish
run.
• For each issue, engineers should “explicitly consider the full range of
management options and objectives that are relevant to the decisions
being made and use models to forecast the expected consequences
of each option.” (McLaughlin, 2013, p. 594)
21.
22. Rec (cont.)
• All streams that are part of the
Penobscot River drainage and
have potential for anadromous
fish passage should be analyzed
for stream connectivity issues at
all crossing between roads and
streams, and design plans should
be created and analyzed
• Other river systems as well
(Kennebec, Androscoggin, etc)
23. Final Recommendation
• It is all about prioritizing
• Which species is blocked
• Structural safety
• Relationship with Penobscot River
Restoration Plan
• Economic potential
• Potential flooding
• Maintenance issues
24. Questions? And for additional info
• eddiegonnella10@gmail.com
• Google:
• Maine Stream Habitat Viewer
• Atlantic Salmon Federation
