Low Impact Development Manual for Michigan - OSEH - University ...

4. Stable debris
As Zone 1 reaches 60 years of age or is hit with
pests or disease, it will begin to produce large
debris. Large debris, such as logs, create small
dams which trap and hold debris for processing by
aquatic insects, thus adding energy to the stream
ecosystem, strengthening the food chain, and
improving aquatic habitat. Wherever possible,
stable debris should be conserved.
• Where debris dams must be removed, try to
retain useful, stable portions which can provide
storage. (A state permit may be required).
For guidance on evaluating debris impacts
on streams and methods for managing debris
jams, refer to the “Primer on Large Woody
Debris Management” developed by the City of
Rochester Hills (see References).
Deposit removed material a sufficient distance
from the stream so that it will not be refloated by
high water.
5. Resources for assistance
Local land conservancies are excellent resources when
considering the long-term stewardship of the area. If a
site has critical value, a local conservancy may be interested
in holding a conservation easement on the area, or
may be able to provide stewardship services and assistance.
The following organizations may also provide
resources:
• Stewardship Network (www.stewardshipnetwork.
org) is a statewide organization that provides
informational and educational resources about
stewardship in Michigan.
• Wild Ones (www.for-wild.org/) is a national
organization with local chapters which may also
provide stewardship resources.
Winter Considerations
Volume reduction, peak rate mitigation, and water quality
benefits are not as pronounced in winter months
compared to the rest of the year in riparian buffers
because infiltration rates are generally lower during
prolonged cold weather periods. In addition, evapotranspiration
rates are lower in winter months because
most vegetation is dormant. However, riparian buffers
still provide stormwater management benefits even in
winter.
Cost
Installing a riparian buffer involves site preparation,
planting, second year reinforcement planting, and
additional maintenance. Costs may fluctuate based on
numerous variables including whether or not volunteer
labor is used, and whether plantings and other supplies
are donated or provided at a reduced cost. The following
table presents an estimate of typical costs for riparian
buffer restoration.
LID Manual for Michigan – Chapter 7 Page 278