Forest Road Deactivation Practices
in the Pacific Northwest
12 - Full Sidecast Pullback	Description, Expectations

Description

Full sidecast (fill) pullback removes the driving weight of a landslide, and restores the slope to its natural profile. Restoring hillslope contours is important to re-establish surface hillslope drainage paths. Ramping and benching may be necessary to achieve these objectives. To re-establish natural subsurface drainage patterns, proper sorting and material placement is essential.

Expectations

1. Before placing the sidecast pullback in the cut, decompact and outslope the subsurface to below the base of the ditch at an angle greater than the grade of the road. The result is a bench which is wider, safer, and lower, allowing for increased machine reach to retrieve roadfill.
2. Eliminate the ditchline to create "flow-thru water management".
3. Place material against the cutslope to buttress the cut and accom-modate seepage. Extend material upslope on the cut to catch seep-age, and extend across the bench to disperse flows at the toe of the pullback roadfill. Proper pullback placement is important.
4. Pull back all unsta-ble or potentially un-stable sidecast from the fill-slope. Place material tight against the cut-bank and over the road mate-rial to the top of the cut, or to its angle of repose.
5. Remove any areas that may trap water, including berms immediately below the pull-back area. Remove all roadfill if subsurface drainage is established and seepage may flow onto potentially unstable fill.
6. To facilitate revegetation, scatter woody debris randomly over recontoured slopes. This provides protection from surface water and rain splash erosion, and better growing sites for tree seedlings.
7. Follow water management rules as with partial pullback.

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Introduction  1   Water Management  2   Waterbars & Ditchblocks  3   Safety and Road Surface  4   Revegetation  5   Sediment Control  6   Erosion Protection  7   Dewatering Streams  8   Cross-Ditches (Road Intact)  9   Cross-Ditches in Pullback  10   Partial Sidecast Pullback  11   Full Sidecast Pullback  12

13  Blanket Drains   14  Trench Drains   15  French Drains   16  Fords   17  Cross-Ditching Practices   18  Cross-Ditching in Pullback   19  Partial Pullback Practices   20  Full Pullback Practices   21  Wood Culvert Removal   22  Metal Culvert Removal   23  Stream Diversion Dams   24  Pre-Work Checklist

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