Transportation & Other Facilities Management - USDA Forest Service
Transportation & Other Facilities Management - USDA Forest Service
Transportation & Other Facilities Management - USDA Forest Service
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R-10 AMENDMENT 2509.22-2006-2<br />
EFFECTIVE DATE: 07/14/2006<br />
DURATION: This amendment is effective until superseded or removed.<br />
Water Quality Issues<br />
Erosion of road embankment at<br />
culvert inlets & outlets.<br />
BMP 14.9<br />
_________ __________<br />
Contractor COR<br />
Additional comments:<br />
Reduced culvert capacity due to<br />
crushing or deformation.<br />
BMP 14.9<br />
_________ __________<br />
Contractor COR<br />
Additional comments:<br />
Ditch sediment load flowing<br />
directly into streams. BMP 14.9<br />
_________ __________<br />
Contractor COR<br />
Additional comments:<br />
Ditch sediment load flowing<br />
directly into streams due to culvert<br />
clearing in flowing streams or<br />
ditch clearing in actively flowing<br />
ditches. BMP 14.9<br />
_________ __________<br />
Contractor COR<br />
Additional comments:<br />
Ditch and road embankment scour<br />
and erosion. BMP 14.9<br />
_________ __________<br />
Contractor COR<br />
Additional comments:<br />
Deposition of excavated materials<br />
beyond roadway limits or on<br />
slopes adjacent to drainages.<br />
BMP 14.10 & 14.12<br />
_________ __________<br />
Contractor COR<br />
Additional comments:<br />
Scour, erosion, and increased<br />
sediment/bed-load in stream.<br />
BMP 14.14<br />
_________ __________<br />
Contractor COR<br />
Additional comments:<br />
FSH 2509.22 – SOIL AND WATER CONSERVATION HANDBOOK<br />
CHAPTER 10 – WATER QUALITY MANAGEMENT FOR<br />
NATIONAL FOREST SYSTEM LANDS IN ALASKA<br />
Mitigation Measures<br />
Place riprap as specified.<br />
14.5 Exhibit 01--Continued<br />
Timing<br />
2509.22_10<br />
Page 67 of 117<br />
Immediately after<br />
culvert installation.<br />
Implemented/<br />
Date if<br />
Appropriate<br />
________<br />
Install at design minimum depth. As identified. ________<br />
Install cross drain culvert to discharge on filter. As identified. ________<br />
When possible confine these activities to the period of July 15<br />
through August 15. If work is done outside this timeframe,<br />
construct sediment ponds, install silt fences, or hay/straw bales<br />
to mitigate sedimentation.<br />
________<br />
Install ditch blocks and riprap lining as specified. As identified. ________<br />
Confine excavation operation to within roadway, and avoid<br />
placing material near drainages.<br />
As identified. ________<br />
Avoid removing large woody debris from streams. As indentified. ________
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