IEPA FINAL REPORT JUNE 2006
MUDDY WATERS POND RESTORATION
AGREEMENT NUMBER 3190309
CONSERVATION DESIGN FORUM (PROJECT NO. 03095.00) PAGE 3
treatment, hand weeding, and mowing as necessary to maintain appropriate plantings within
the first couple years of plant establishment. The long-term maintenance regime will be annual
Treatment 2: Interplanted Stone over Geotextile
Description: This technique was used to create a stable slope within a constricted setting at one
of the inlets to the detention pond. The technique utilized angular stone (3-4”) placed over
geotextile. Rock was placed approximately 0.5 feet below NWL to 3.5 feet above the NWL. A
stone depth of at least 8 inches was topped with planting soil to provide a planting medium for
native seed and plugs that were installed within the interstitial spaces of the rock. Interplanting
the stone provides a modest amount of additional stabilization, as well as improved habitat and
aesthetics. Additional minor rip rap armouring was used along the slopes at each of the inlet
pipes to address post-construction erosion rills.
Refer to cross sections F and G for this technique.
Cost Considerations: This was one of the least costly treatments since it involved little
earthmoving and utilized relatively inexpensive materials.
Advantages and disadvantages: This was the least costly method to implement and given the
ability to interplant and soften the appearance of the stone, this technique visually is similar to
the clay soil shelf technique. Because this method did not create an aquatic shelf, it provided
less aquatic habitat and less soil-water interface for water quality improvement. Also, this
method was less morphologically sound than the primary treatment method since the stone was
used to hold a steeper slope. However, due to the limited use of this technique and the addition
of established plant roots, the integrity of the slope should endure.
Maintenance: To ensure long-term stabilization, the shoreline should be inspected periodically to
ensure that the stone remains in place. Initially, inspections should occur each fall and spring
and after each major storm event with high water levels. After time, the inspection interval
should be re-evaluated to determine if adjustments are needed. Maintenance will include
periodic replacement of stone and weeding as necessary to maintain appropriate plantings.
Treatment 3: Stone Fishing Platforms
Description: This treatment was used to allow preservation of existing trees that otherwise would
have required removal to accommodate re-grading of the slopes. Outcropping stone was laid
on a 3” gravel bed to create an area of approximately 9’x 3’. The graded upslope was seeded
with turf grass. The stone also allowed creation of fishing platforms to improve public access.
This technique is shown on cross sections numbered 6 and 15.
Cost Considerations: Although the cost of the outcropping stone and their placement is
somewhat high, there is little cost associated with earth moving. This technique was the most
expensive shoreline treatment based on linear feet stabilization cost. However, this technique
was selected due to its limited use and its coinciding functions of shoreline stabilization and safe
access to the pond edge.
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