Erosion and Sediment Pollution Control Program Manual.pdf

The locations, spacing, etc. of proposed BMPs should be shown on the plan drawings, maps, and/or
profile sections.
All surface waters, as defined in 25 Pa. Code § 102.1, which could be affected by the proposed
earthmoving should be shown on the plan maps. Trench plugs should be installed on both sides of all
crossings to prevent draining streams or wetlands, and to prevent changes to their hydrology. Specific
instructions should be provided for each type of water crossing anticipated, such as major streams,
minor streams, swales, wetlands, etc. Site specific wetland and stream crossing may be requested by
the Department or conservation district for review. All appropriate Chapter 105 permits must be
obtained prior to initiating any stream or wetland crossing by pipeline, utility line, or access road.
ROADWAY CROSSINGS
The types and locations of control measures needed at roadway crossings depends upon the slope of
the land and types of roadway drainage systems present at that location. Upslope runoff should be
diverted around the work area by use of waterbars. Sediment barriers should be located downslope of
trench or boring pit storage piles. Such storage piles may not be located in any roadway swale or ditch
or within 10 feet of a stream. Runoff from existing roadway culverts, storm sewers, swales, and ditches
should be safely conveyed over any open trench. Suitable inlet protection should be provided for any
storm sewer inlet that may receive runoff from a disturbed area.
Specific instructions should also be given for each type of roadway crossing with particular attention
given to roadway drainage structures, such as channels, ditches, sewer lines, etc. A typical detail
should be provided for each type of roadway crossing, such as trench, boring, etc.
STREAM CROSSINGS
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Horizontal directional drilling (HDD) has been used as an effective technique for the installation of
pipelines and other utilities in sensitive or congested areas, including streams and wetlands. As the
drainage area for a waterway increases, open-cut methods become less practical and HDD becomes
363-2134-008 / March 31, 2012 / Page 284