_ENFORCEMENT - C1981017 ‎(9)‎

• Permit No: C1981017
• IBM Index Class Name: Enforcement
• Doc Name: Bid Documents ‎(IMP)‎ CV-91-023
• Violation No.: C-91-023
• Media Type: D
• Archive: No

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inside. :f current use is light use, but future use is for access
or coal haulage, unneeded width should be ripped and seeded.
In either case , appropriate drainage control structures should be
installed and maintained. In road segments where road ditches
cannot be maintained, a combination of waterbars and outside berms
may be aporooriate , but the maintenance plan would need to address
how snow removal would be accomplished without ousning berm
material over the outslcpe.
On some light use road segments where surface rill erosion is a
problem, waterbars or beltline surface water deflectors which would
intercept road surface drainage , but not ditch drainage may be
appropriate.
Consideration should be given to replacing culverts which are
subject to frequent clogging or abrasion with appropriately
designed and outfall protected dips or low water crossings .
Given the high maintenance nature of the Coal Basin road system, a
specific commitment of time and resources to regular and post storm
event inspection and maintenance is critical . Plans for snow
removal which are practical , yet compatible with the goal of
minimizing sedimentation from the road system should be developed.
Locations for storage or disposal and stabilization of sediment
from ditch or sediment trap cleanout need to be specified.
W th reswect to road width reduction, in most cases it should be
accomplished by a combination of fill slope crest reduction and
moving the drainage ditch further out from the cut slope . An
exception would be upper segments of Road G which are characterized
by well vegetated cut and fill slopes and which have experienced
very little erosion. In such areas , the fill slope should not be
disturbed .
Problem: Excessive sedimentation to streams from road surfaces and drainage
ditches ( see NOV C-91-017)
Contributing Factors :
Excessive ditch gradients , erosive velocities
- Culverts or ditch relief drains which divert large volumes of
sediment laden runoff directly into eater courses or onto steep,
non vegetated slooes with little or no potential for any setting of
sediment before the runoff reaches a live water course .
Possible approaches :
Riprap erosive ditch segments and/or install check structures to
slow velocities .
Provide additional ditch relief structures (culverts , waterbars ,
rolling dips) in locations where vegetation will provide some
filtering of sediment.