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Georgia Utility
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Association, Inc. |
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| Mitigation Bank Construction |
| Project: | Weehadkee Farm Mitigation Bank |
| Owner: | Mitigation Resource Group |
| Location: | Heard County, Georgia |
| Engineer: | David A Burre Engineers & Surveyors, Inc. |
| Contact: | Tim Funk (Wetlands Ecological) |
| Completion: | Construction is paused for planting establishment. Anticipate resumption of final phase of construction mid May 2008 |
| Project Superintendent: | Donald Spinks |
| Project Details: |
This project involves the conversion of a former 500 acre cattle farm into a mitigation bank site. Basic scope to be performed is as follows: drain existing ponds (1/5 acre and 2½ acre) by breeching the dams and installing a series of rock vane structures in the dam breech; clearing and reshaping existing stream channel (channel #1-approx. 3700 feet of stream) in order to stabilize and revegetate, structures installed include tree revetments and boulder clusters for bank stabilization; dig new channel (channel #2-approx. 2200 feet of stream) and install combination of rock vane structures, channel constrictors, K dams, tree revetments and boulder clusters for bank stabilization, redirect stream flow and fill in abandoned stream bed. Re-vegetate with riparian plantings; install concrete check dams in low lying areas to create wetland habitats.
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| Idle and overgrown, this property with several streams and artificial ponds represented a perfect opportunity for rehabilitation and repurposing. |
A credit-rich, economical, durable, and sustainable mitigation bank emerges through expert design and construction. |
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| The dam of the 3-acre pond was breached in order to allow streams to flow in a more regulated way. A series of Cross-Vanes in the breach reduces the flow to match the level of the stream. |
This is a close-up of the Cross-Vane structures and and looking downstream. |
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| The drained pond upstream beyond the uppermost Cross-Vane has begun vegetating. The pond was originally formed from two streams. The streams are beginning to establish their new channels.
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The banks of this existing channel were cleared of vegetation, and reshaped and sloped. Log revetments protect the newly-sloped banks, which have already begun revegetating. |
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| The large rock mid-stream helps direct and control the main channel flow, and helps protect the bank. |
In this half-mile portion of the stream, the scope of the project and sinuosity of the stream are apparent. |
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| The newly-dug stream features shaped and sloped banks, stablized and protected with bio-friendly coir matting, and boulder clusters in the stream which protect the banks, which began vegetating almost immediately. The old stream has not yet been diverted in to new stream. |
Structures like these two Cross-Vanes offer grade control, reduce bank erosion, and improve stream habitat.
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| Shaped and sloped banks, new vegetation, boulder clusters, and a K-Dam structure are features of this newly-cut channel. |
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