Salix Erosion Control and Stream Restoration

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Erosion Control

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Stafford Slide Biotechnical Erosion Control Project
PHOTO DOCUMENTATION:
Stafford Slide part 1

Stafford Slide part 4

SOUTH SLIDE

The South Slide received the same types of biotechnical treatments as the North Slide. On the South Slide, PALCO workers installed 23 willow wattles of varying length, for a total of 168 linear feet of willow wattles. Workers also constructed 18 live pole drains of varying length, for a total of 348 linear feet of live pole drains. Additionally, 14 modified brush layers were constructed, for a total of 95 linear feet of modified brush layers. Approximately 300 linear feet of live stakes were also installed, ranging from 1-3 feet apart.

Modified brush layers growing on South Slide (June 2nd, 2000 site visit).

Stafford Slide

Biotechnical Erosion Control was used to help stabilize the Stafford Slide, reduce surficial erosion, and revegetate bare, exposed slopes. PALCO workers harvested cuttings of locally-adapted willow species. The miracle of willow is that it can form adventitious roots from the portion of the stem that is in contact with soil and water, while branches sprout above. The roots eventually spread out and stabilize the soil. Biotechnical systems are strong initially and grow stronger with time as the vegetation becomes established. The photo above shows a willow wattle which is beginning to form adventitious roots. (Stafford Slide, June 2, 2000)

This live pole drain was installed on the North Slide in order to help drain excess moisture from the slope.