crossings in the St. Joseph River Watershed were quantified using
the Landscape Analyst extension to ArcView 3.2. The model output
indicated that there are over 4,600 road-stream crossings in the
watershed. Click on the image below to see a map of the identified
319 grantees in Michigan typically survey road-stream crossings
as a part of their grant requirements. Crossings in the Rocky River
and Hog Creek Watersheds were surveyed in 2003. Sediment loading
due to erosion at selected sites was quantified. In 2004, an MDEQ
student intern surveyed several road-stream crossings and quantified
sediment loading from the identified eroding sites. The sum of the
estimated annual sediment loading from the sites surveyed was 75
tons/year. Click on the image below to see a map of the quantified
Michigan Department of Environmental Quality requires Section 319
grant recipients to conduct surveys of the road-stream crossings,
using an agency
form, in their watersheds. However, prior to this project, that
form did not lead to quantification of sediment loading.
was developed to determine a method for quantifying erosion from
streambanks and road-stream crossings in the St. Joseph River Watershed.
View the Subcommittee's
View the list
of Subcommittee members.
of forms meant to score
erosion and habitat
quality at road-stream crossings and along
streambanks were presented to the Subcommittee. It was decided
that it would be best for agencies conducting these surveys to add
a few key parameters to their existing forms.
addition of these key parameters were field tested in two subwatersheds
of the St. Joseph River Watershed: Hog Creek and Rocky
here to review all of the data from the Rocky River Watershed
in an .xls format. Ten sites were revisited so that additional parameters
could be recorded. An estimation of sediment loading was determined
at those sites. Click
here to download the .xls file of the site data. The
map above to illustrates site locations and loading from each
the images below to view larger photographs.
attempt was made to correlate the loading values to the ranking
assigned during the initial survey. Those rankings are categorical
(e.g. poor, fair, good). However, there was no correlation found
between sediment loading (tons/year) and the scores derived from
the MDEQ form (either for total site score or for erosion severity).
graph images below for larger views.
Road-Stream Crossing erosion quantification workshop, was held November
5, 2003 at A Place in Time in Downtown Three Rivers, MI.
Several attendees, including road commissioners, drain commissioners/surveyors,
biologists, NRCS staff and watershed planners, were present. Presentation
were delivered by:
above links to view available presentations.
A summary of the
workshop is available as a PDF.
here to access "FishXing", fish passage/culvert design
photos of well designed and failing culverts.
has been developed for the Kalamazoo River to share streambank erosion