DESCRIPTION
At the Wolfridge Resort, the Methow River has been migrating to the south, eroding a high bank for the past 20 years. The situation has been of concern for the homeowners association. Ten years ago, a series of log structures were installed at the resort to prevent further bank erosion. Over time, these log structures have been undercut and have failed. Bank loss has continued. A cooperative project was initiated in 2010 to protect the bank. The primary focus of the project was bank stabilization through the installation of an engineered log jam and the resetting of all the existing failed log structures. A series of five log jams were installed to protect the eroding bank. A high density planting occurred on the lower benches to help stabilize the bank. A riparian buffer was also established, creating a 75-100' vegetated buffer along the entire length of the project. Landowner access will be through a series of gates and a main path through the plantings, removing individual paths that exacerbated the erosion.
Numerous pole cuttings were planted around each of these structures during construction. The poles placed further back on the structures on the lower planting bench were included in the deer fence to protect from the browse. Downstream of the log jams, revetment was installed to protect the riverbank from undercutting. Two fenced enclosures were also installed as planting buffers, to the north and west, and were supplemented with drip irrigation. The surrounding grass has been watered and mowed regularly, with individual plantings mulched and fertilized. Additional potted plants were planted along the trail and on the berm between the buffer plantings and pasture. Mowing, weed whacking, and weekly watering were implemented to assist survival, which is at 86%. Native grasses were seeded and weed presence is expected to further decline as these take hold. Fertilization of the north enclosure is recommended for next year. Overall, the plants have started to experience vigorous growth, and the revetment has held up very well, with plants establishing on the slope. Bank erosion has been reduced and riparian vegetation is established. Resort guests are utilizing the new centralized trails as evidenced by the worn main pathway.