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So Larry, you were the Site Engineer for
this particular project. What are some
of the physical constraints and some of
the project details that went into doing
the design here?
Larry: As a roadway designer, my first
challenge was to really recognize that
this was an opportunity to enhance an
existing stream. It's more than just a
roadside channel or ditch and working
with the other agencies, we had the
opportunity to really improve the
characteristics of the stream and bring
it back to a more natural setting.
So we, again, worked with the roadway
alignment and also modeled the alignment
of the stream and all the curves,
designed by SERPC (The Southeastern
Wisconsin Regional Planning Commission)
and also a flood-plain area that we had
to model and see how that balanced with
the roadway surface and create a flood-
plain area to provide buffers on each
side of the stream to help us determine
how much easement we would need for the
area. So that was an initial challenge.
Faith: So it started out as a –
basically, a ditch that went through
Faith: And now you've created a more
natural stream and added some flood
plain as well?
Larry: Right, exactly. Another important
phase next was how do we staged the
construction of the stream to match with
the construction of the roadway. This
section here we had an early contract to
grade the stream and get – all the
planting was done ahead of time so it
had a chance to vegetate for a year in
advance of any road construction.
Faith: I imagine that was really important.
Larry: Right, definitely. So we were
staging the phases of the stream similar
to how you would phase a roadway project
where you're really concerned about
getting the new ground stream to
vegetate, keeping water in the old
stream, but balancing it all with
construction equipment for the roadway.
[End of Audio]
Title: Urban stream restoration in a freeway interchange, County G I-94 Interchange, Wisconsin
Faith Fitzpatrick (U.S. Geological Survey) and Larry Pfeil (Wisconsin Department of Transportation) discuss the overall design to construct a natural looking stream from a ditch within the constraints of roadway alignment, buffers, easements, and culverts.
Location: Milwaukee, WI, USA
Date Taken: 11/17/2010
Video Producer: Douglas A. Harned , National Water-Quality Assessment Program (NAWQA), USGS, North Carolina Water Science Center, Raleigh, NC
Note: This video has been released into the public domain by the U.S. Geological Survey for use in its entirety. Some videos may contain pieces of copyrighted material. If you wish to use a portion of the video for any purpose, other than for resharing/reposting the video in its entirety, please contact the Video Producer/Videographer listed with this video. Please refer to the USGS Copyright section for how to credit this video.
Additional Video Credits:
Faith Fitzpatrick: Scriptwriter, Narrator, Scientist Consultant
Gerard McMahon: Producer
Douglas Harned: Producer, Video, Editor
Alan Cressler: Video
Luke McMahon: Video
Larry Pfeil (Wisconsin Department of Transportation)
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