The existing banks were six to ten feet tall, near vertical, continuing to erode and beginning to expose vital sanitary sewer infrastructure. The City contracted with Plan B Development to construct a bank stabilization project. A product called A-Jacks was used to stabilize the toe (or bottom) of the slope. These armour units are available in many sizes. A smaller size was chosen for this project so that it could be installed by a person reducing the need for large machinery. Most alternative solutions would require multiple concrete trucks or dump trucks full of rock to travel up and down the trail. By using A-Jacks, the contractor could minimize the use of large construction equipment and minimize damage to the Bear Creek Trail.
|A-Jacks fit together and interlock.|
|Sloping banks with A-Jacks at the bottom. |
Erosion control fabric and vegetation will stablize the upper portion of the slope.
|A-Jacks at pipe outlet with erosion control fabric on the adjacent bank.|