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Module 11: Erosion and Sedimentation Controls
Instructions: Information submitted under this Module must be certified by a licensed professional engineer.
Provide the following information for each surface mining activity site. Organize the information by completing
separate sets of answers to Modules 11.1 and 11.2 for each site. Narrative descriptions should reference the
information on Exhibit 9.1.
11.1
11.2
Erosion & Sedimentation Controls
a.
Provide detailed site development plans which will be used during site preparation and operation.
b.
Using Form 11.1A, Diversion/Collection Channel Data Sheet, provide detailed design and construction
information for all channels.
c.
Provide typical channel cross sections. Submit installation specifications for alternatively (turf
refinforcement matting, concrete revetment, etc.) lined channels.
d.
Provide design criteria and capacity calculations for all drainage pipes and culverts. Provide a culvert
summary table that lists;
i.
Culvert length, size and type
ii.
Invert inlet and outlet elevations
iii.
Available headwater depth
iv.
Required headwater depth
v.
Tailwater depth
vi.
Actual design outlet velocity, and
vii.
Outlet protection provided
e.
Provide culvert inlet/outlet design details and outlet protection designs.
f.
Provide documentation of the capacity of any existing drainage structures, which will receive drainage
from the site.
g.
Provide design details for all other erosion and sedimentation structures. (Details regarding pond
construction should be addressed under Module 13.)
Roads
a.
b.
Provide the following information for each road meeting either of the following criteria:
i.
A road which will be constructed or improved in order to provide site access; or
ii.
A road which will be used on a regular basis to haul coal, refuse, ash or supplies to or from the
site.
All plans and information must be certified by a licensed professional engineer.
i.
Show the road in plan view on the Exhibit 9.1, including all bridges, culverts and drainage pipes.
ii.
Provide cross sections showing construction details, including existing ground, construction
materials, and surface grading.
iii.
Describe the measures which will be used to control and prevent erosion and sedimentation
(include proposed spacing of sediment traps, turnouts, culverts, check dams, etc.).
iv.
Provide measures to prevent tracking of materials off site from roads, or coal or coal refuse
storage areas. Depict measures on Exhibit 9.1.
v.
Describe the type of traffic the road is designed to accommodate.
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vi.
If the road involves the crossing of any intermittent or perennial stream or wetland, check the
appropriate block in Module 4 and complete Module 15.
vii.
Indicate whether a PennDOT highway occupancy permit will be needed. (Note: a copy of the
permit must be submitted prior to permit activation.)
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FORM 11.1A
DIVERSION / COLLECTION CHANNEL DATA SHEET
Title:
Site:
Company:
Permit Number:
Prepared by:
Telephone Number:
Date:
Sheet
___ of
___
Channel Cross-section Type:
Station
Drainage Design
Area
Storm
Start
End
Elevation
acres
(yrs.)
Average
Watershed
Slope
(%)
Curve
Number
Peak
Discharge
Q
Channel
Bed Slope
cfs
(%)
Channel
Lining
Manning’s
Freeboard
(specify
Coefficient
average rock
(ft.)
size
(n)
With Freeboard
Channel
Bottom
Width
Channel
Side
Slopes
Flow
Area
Flow
Depth
Top Flow
Width
(ft)
L/R
(sq.ft.)
(ft.)
(ft.)
Channel Profile
11 – 3
Flow
Velocity
(ft./sec.)
Q
Available
Channel
Depth
cfs
(ft.)
Top
Channel
Width
(ft.)
Q
Available
cfs