20160530 Ver 1_401 Application_20160516

(� DUKE
ENERGY.
May. 23, 2016
Ms. Karen Higgins
Division of Water Resources
401 & Buffer Permitting Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
PAID
RE: Pre -Construction Notification — NW P 39
Duke Energy Mayo Steam Station, Roxboro, Person County, NC
Seepage Collection Plan
Dear Ms. Higgins:
410 S Wilmington St.
Raleigh NC 27601
�01
so 53
0
Enclosed is a Pre -Construction Notification (PCN) application for the above referenced project
located north of Roxboro in Person County, North Carolina. In accordance with Section 404 of
the Clean Water Act (33 USC 1344), Duke Energy is requesting authorization for a Department
of the Army Nationwide Permit (NWP) #39 to disturb Waters of the United States as part of the
Mayo Steam Station seepage collection project. Please find enclosed a project description for
this project, along with supporting documentation and figures.
Please do not hesitate to contact me at [phone] or [e-mail], if
you have any questions regarding this PCN application.
Respectfully,
Steve Cahoon
Duke Energy
EHS — CCP Permitting and Compliance
Enclosures
12 k [711414 D 2 3 2016

Aof WA r f9O
Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.4 January 2009
Page 1 of 10
PCN Form — Version 1.4 January 2009
Pre -Construction Notification (PCN) Form
A.
Applicant Information
1.
Processing
1a. Type(s) of approval sought from the Corps:
❑X Section 404 Permit ❑ Section 10 Permit
1b. Specify Nationwide Permit (NWP) number 39 or General Permit (GP) number:
1c.
Has the NWP or GP number been verified by the Corps?
Q Yes ❑ No
1d. Type(s) of approval sought from the DWQ (check all that apply):
❑X 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization
1 e.
Is this notification solely for the record
because written approval is not required?
For the record only for DWQ
401 Certification:
❑ Yes ❑X No
For the record only for Corps Permit:
❑ Yes NX No
1f.
Is payment into a mitigation bank or in -lieu fee program proposed for
mitigation of impacts? If so, attach the acceptance letter from mitigation bank
or in -lieu fee program.
N Yes ❑X No
1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below.
❑ Yes N No
1h.
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes NX No
2.
Project Information
2a. Name of project-
Mayo Steam Station Seepage Collection Plan
2b. County:
Person
2c.
Nearest municipality / town.
Roxboro
2d. Subdivision name
N/A
2e.
NCDOT only, T LP or state project no-
N/A
3.
Owner Information
3a
Name(s) on Recorded Deed.
Duke Energy Progress, LLC nn
3b.
Deed Book and Page No
3c
Responsible Party (for LLC if
applicable):
MAi 3 ZQjs
3d
Street address:
10660 Boston Road
3e
City, state, zip.
Roxboro, NC 27574 40 & BUFFER p SOURCES
3f
Telephone no
919-546-7457
3g
Fax no
3h
Email address
[e-mail]
Page 1 of 10
PCN Form — Version 1.4 January 2009

4. Applicant Information (if different from owner)
4a Applicant is:
❑ Agent ❑X Other, specify: Duke Energy Progress Employee
4b. Name•
Steve Cahoon - Senior Environmental Specialist
4c. Business name
(if applicable):
Duke Energy Progress
4d. Street address:
410 Fayetteville Street
4e. City, state, zip:
Raleigh, NC 27601
4f. Telephone no.:
919-546-7457
4g. Fax no.:
4h. Email address:
[e-mail]
5. Agent/Consultant Information (if applicable)
5a. Name -
5b. Business name
(if applicable) -
5c Street address:
5d. City, state, zip:
5e. Telephone no.:
5f. Fax no.
5g. Email address:
Page 2 of 10

B. Project Information and Prior Project History
1. Property Identification
1a Property identification no. (tax PIN or parcel ID):
N/A
1b. Site coordinates (in decimal degrees):
Latitude: 36.53905487 Longitude: 78.89310455
1c. Property size:
acres
2. Surface Waters
2a. Name of nearest body of water to proposed project:
Crutchfield Branch
2b. Water Quality Classification of nearest receiving water:
Class B
2c. River basin:
Roanoke - HUC 03010104
3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application
The site contains the existing Mayo Steam Station electric generating plant and the associated ash pond. Land us in the vicinty to the protect is
primarly undeveloped forest land and agricultural land.
3b List the total estimated acreage of all existing wetlands on the property: 40
3c List the total estimated linear feet of all existing streams (Intermittent and perennial) on the property: 113640
3d. Explain the purpose of the proposed project:
The purpose of the protect is to collect water from the ash basin seeps and reroute the water back to the ash pond
3e Describe the overall project in detail, including the type of equipment to be used:
See the project narratives in Attachement A Typical construction equipment including tracked/wheeled excavators and dump trucks may be used
4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
project(including all priorphases) in thepast?
❑X Yes ❑ No ❑ Unknown
Comments: Field approval by USACE on 3/14/16
4b. If the Corps made the jurisdictional determination, what type
of determination was made?
E] Preliminary El Final
4c If yes, who delineated the jurisdictional areas?
Name (if known).
Agency/Consultant Company. Amec Foster Wheller
Other:
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation
The USACE completed a field review of a portion of the Mayo Plant site on March 14, 2016. The delineation at the project site location was reviewed
during this site visit and approved with revisions.
5. Project History
5a. Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past?
❑ Yes ❑X No ❑ Unknown
5b. If yes, explain in detail according to "help file" instructions.
6. Future Project Plans
6a. Is this a phased project?
❑ Yes 0 No
6b If yes, explain.
Page 3 of 10
PCN Form — Version 1.4 January 2009

C. Proposed Impacts Inventory
1. Impacts Summary
1a. Which sections were completed below for your project (check all that apply):
❑ Wetlands ❑X Streams — tributaries ❑ Buffers ❑ Open Waters ❑ Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted
2a.
Wetland impact
number
Permanent (P) or
Temporary T
2b.
Type of impact
2c.
Type of wetland
2d.
Forested
2e.
Type of jurisdiction
Corps (404,10) or
DWQ (401, other)
2f
Area of
impact
(acres)
W1
Choose one
Choose one
Yes/No
W2
Choose one
Choose one
Yes/No
W3
Choose one
Choose one
Yes/No
W4
Choose one
Choose one
Yes/No
W5
Choose one
Choose one
Yes/No
W6
Choose one
Choose one
Yes/No
2g. Total Wetland Impacts:
2h Comments:
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a.
Stream impact
number
Permanent (P) or
Temporary (T)
3b.
Type of impact
3c.
Stream name
3d.
Perennial (PER) or
intermittent (INT)?
3e.
Type of
jurisdiction
3f.
Average
stream
width
(feet)
3g.
Impact
length
(linear
feet)
S1 P
Fill
UT Crutchfield Branch
PER
Corps
15
20
S2 P
Fill
Crutchfield Branch
PER
Corps
8
20
S3 T
Fill
UT Crutchfield Branch
PER
Corps
15
6
S4 T
Fill
Crutchfield Branch
PER
Corps
8
6
S5
Choose one
S6
Choose one
3h. Total stream and tributary impacts
52
3i. Comments:
Permanent impacts of 20 feet of stream to S1 and S3 are associated with the west and east seepage collection systems and sump boxes to be placed
in the channel Temporary impacts of 6 feet of channel to S2 and S4 are associated with a rock check dams located downstream of the seepage
collection systems and sump boxes See Attachment A and the attached permit drawings for impact details
Page 4 of 10
PCN Form — Version 1.4 January 2009

4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then indivii ually list all open water impacts below.
4a.
Open water
impact number
Permanent (P) or
Temporary T
4b.
Name of waterbody
(if applicable)
4c
Type of impact
4d.
Waterbody
type
4e.
Area of impact (acres)
01
Choose one
Choose
02
Choose one
Choose
03
Choose one
Choose
04
Choose one
Choose
4f. Total open water impacts
4g Comments:
5. Pond or Lake Construction
If pond or lake construction proposed, the complete the chart below.
5a.
Pond ID number
5b.
Proposed use or
purpose of pond
5c.
Wetland Impacts (acres)
5d.
Stream Impacts (feet)
5e.
Upland
(acres)
Flooded
Filled
Excavated
Flooded
Filled
Excavated
P1
Choose one
P2
Choose one
5f. Total:
5g. Comments:
5h. Is a dam high hazard permit required?
❑ Yes ❑ No If yes, permit ID no:
5i. Expected pond surface area (acres)
5j. Size of pond watershed (acres):
5k. Method of construction.
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
below If any impacts require mitigation, then you MUST fill out Section D of this form
6a. Project is in which protected basin?
❑ Neuse ❑ Tar -Pamlico ❑ Catawba ❑ Randleman ❑ Other.
6b.
Buffer Impact
number —
Permanent (P) or
Temporary T
6c
Reason for impact
6d
Stream name
6e.
Buffer
mitigation
required?
6f
Zone 1
impact
(square
feet)
6g
Zone 2
impact
(square
feet
BI
Yes/No
B2
Yes/No
B3
Yes/No
B4
Yes/No
B5
Yes/No
B6
Yes/No
6h. Total Buffer Impacts:
61 Comments:
Page 5 of 10

D. Impact Justification and Mitigation
1. Avoidance and Minimization
la Specifically describe measures taken to avoid or minimize the proposed impacts in designing project
The limits of disturbance (LOD) for the proposed seepage collection system will be limited to the areas necessary for placement of the seepage
collection sumps and will have no additional stream impacts Impacts to Waters of the US will be kept to the smallest footprint practicable. No
impacts to jurisdictional wetland areas will result from project construction
1b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques
Silt fencing will be utilized to prevent sediment from entering the stream features Silt fencing will be installed beyond the limits of adjacent wetland
areas Sand bags and Filtrexxx Sox will be utilized to prevent sediment from leaving the LOD Upon completion of project construction, areas of
temporary impacts will be restored to pre -construction conditions Access for construction equipment will be provided by existing gravel access roads
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State?
❑ Yes ❑X No
2b. If yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
2c If yes, which mitigation option will be used for this
project?
❑ Mitigation bank
El Payment to in -lieu fee program
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank
3b. Credits Purchased (attach receipt and letter)
Type: Choose one
Type: Choose one
Type- Choose one
Quantity.
Quantity:
Quantity:
3c. Comments.
4. Complete if Making a Payment to In -lieu Fee Program
4a. Approval letter from in -lieu fee program is attached
❑ Yes
4b. Stream mitigation requested:
linear feet
4c If using stream mitigation, stream"temperature:
Choose one
4d Buffer mitigation requested (DWQ only)
square feet
4e Riparian wetland mitigation requested:
acres
4f. Non -riparian wetland mitigation requested
acres
4g Coastal (tidal) wetland mitigation requested:
acres
4h. Comments.-
omments:5.
5.Complete if Using a Permittee Responsible Mitigation Plan
5a If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
Page 6 of 10
PCN Form — Version 1.4 January 2009

6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires
Yes X No
buffer mitigation?
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.
6c.
6d.
6e.
Zone
Reason for impact
Total impact
Multiplier
Required mitigation
(square feet)
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
1.5
6f. Total buffer mitigation required:
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund).
6h. Comments:
Page 7 of 10

E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1a. Does the project include or is it adjacent to protected riparian buffers identified
within one of the NC Riparian Buffer Protection Rules'?
❑ Yes ❑X No
lb If yes, then is a diffuse flow plan included? If no, explain why.
❑ Yes ❑ No
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project?
2b. Does this project require a Stormwater Management Plan?
❑ Yes No
2c If this project DOES NOT require a Stormwater Management Plan, explain why:
There will be no impervious surfaces associated with this project
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan.
2e. Who will be responsible for the review of the Stormwater Management Plan?
3. Certified Local Government Stormwater Review
3a. In which localgovernment's jurisdiction is this project?
/
3b Which of the following locally -implemented stormwater management programs
apply (check all that apply):
❑ Phase II
❑ NSW
❑ USMP
❑ Water Supply Watershed
❑ Other:
3c. Has the approved Stormwater Management Plan with proof of approval been
attached?
❑ Yes ❑ No
4. DWQ Stormwater Program Review
4a. Which of the following state -implemented stormwater management programs apply
(check all that apply) •
❑Coastal counties
❑HQW
❑ORW
E] Session Law 2006-246
❑ Other:
4b Has the approved Stormwater Management Plan with proof of approval been
attached?
❑ Yes ❑ No
5. DWQ 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements?
❑ Yes ❑ No
5b. Have all of the 401 Unit submittal requirements been met?
❑ Yes ❑ No
Page 8 of 10
PCN Form — Version 1.4 January 2009

F.
Supplementary Information
1.
Environmental Documentation (DWQ Requirement)
1a.
Does the project involve an expenditure of public (federal/state/local) funds or the
[] Yes
No
use of public (federal/state) land?
lb
If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State
El Yes
❑ No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1c.
If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
letter.)
❑ Yes
❑ No
Comments:
2.
Violations (DWQ Requirement)
2a.
Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards,
E] Yes
❑X No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b
Is this an after -the -fact permit application?
❑Yes
❑X No
2c
If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
3.
Cumulative Impacts (DWQ Requirement)
3a.
Will this project (based on past and reasonably anticipated future impacts) result in
❑ Yes
❑X No
additional development, which could impact nearby downstream water quality?
3b
If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
4.
Sewage Disposal (DWQ Requirement)
4a
Clearly detail the ultimate treatment methods and disposition (non -discharge or discharge) of wastewater generated from
the proposed project, or available capacity of the subject facility.
This protect will not generate wastewater.
Page 9 of 10
PCN Form — Version 1 4 January 2009

S. Endangered Species and Designated Critical Habitat (Corps Requirement)
So. Will this project occur in or near an area with federally proteded species or
Yes No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act
❑Yes ®No
impacts?
5c. If yes, indicate the USFWS Field Office you have contacted.
-
5d. What data sources did you use to determine whether your site would Impact Endangered Species or Designated Critical
Habitat?
USFWS information, Planning, and Conservation System (IPaC) we 9 and the N.C. Natural Heritage Program (NCNHP) Natural Heritage
Database Search Interactive website.
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat?
❑ Yes ® No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
htip:lkwan.ftotidarnadm.org/off�_corat4msMewer.htm
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur In or near an area that the stats, federal or tribal
governments have designated as having historic or cultural preservation
Yes ®Na
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b. What data sources did you use to determine whether your site would Impact historic or archeological resources?
N.C. Dept. of Cultural Resources, State Historic Preservation Office (SHPO) Interactive website (HPOWEB).
B. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain?
❑ Yes ® No
8b. If yes, explain how project meets FEMA requirements:
8c. What source(s) did you use to make the floodplain determination?
NC Flood Maps. FEMAIFIRM number 370N60031J, dated June 4, 2007.
54t,u C� h
-5r-/ 1//6
Applicant/Agent's Printed Name
Applicant/Agent's Signature
Date
(Agenra signature Is valid only If an authorization
letter from the applicant is rovlded.
Page 10 of 10

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Attachment A
USACE Pre-Construction Notification — NWP 39
Duke Energy Carolinas, LLC
Mayo Steam Station Seepage Collection Plan
Person County, NC
ATTACHMENTS
Site Location Map
USGS Topographic map
NRCS Soils Map
National Wetland Inventory Map
Jurisdictional Waters Map
Floodplain Map
NCSAM Reaches
Drawing 1 - Plan View drawings
Drawing 2 - Profile drawings

f
Ic
Ic
a
it,
C
U
U
c
'C
C
C
a
n
F
z
3
LCI
rD rD n N !
(D
a _ ♦`'�
I
O y V
cl
a
m^ �'• `
D -u G) 16
m ,Jol
CL
O
m
n
z
0
N
.. \ * y
� � � h_JI � fie." 9 Y i� ,. t'e tY r _ _ � w .✓ • `
i
-: A
4 All
• r
�r --� \� �\ � � .� , ` • \ ��---= / 1 ; � ,- � � 4, � � # Ali � 3 � J
t
" 1 S
OLI
1 _
�r � �'� , •11 � ay r f f `
3' <
r
Z � v
1 C 1
♦ ... � 1. � a.
rl
Ij
i
'c
ti
s,
+
l
� a -
r
w
r�
6
� e� (t��f� I Ij �♦.t a t`.. t� i' t��s� �« � •l jam{ � , 1 �•-
111 \e _
g
y M '' 1 3 t Alr: � rf k. �� � a a■ I
It I
x
p {
f
ire.
r � (i v .
x a a €
r . .
Lf r > 447,_
1
I 4 + � • rJ \\ y
*i !{ It e
c�
c
o
o
N C
-1'<
c'n
C N
co O
O N
cm
0
o C-)
3
m
N
A0
0
z-te
a r.
0
Z/ - O
l) U
n
N
.. \ * y
� � � h_JI � fie." 9 Y i� ,. t'e tY r _ _ � w .✓ • `
i
-: A
4 All
• r
�r --� \� �\ � � .� , ` • \ ��---= / 1 ; � ,- � � 4, � � # Ali � 3 � J
t
" 1 S
OLI
1 _
�r � �'� , •11 � ay r f f `
3' <
r
Z � v
1 C 1
♦ ... � 1. � a.
rl
Ij
i
'c
ti
s,
+
l
� a -
r
w
r�
6
� e� (t��f� I Ij �♦.t a t`.. t� i' t��s� �« � •l jam{ � , 1 �•-
111 \e _
g
y M '' 1 3 t Alr: � rf k. �� � a a■ I
It I
x
p {
f
ire.
r � (i v .
x a a €
r . .
Lf r > 447,_
1
I 4 + � • rJ \\ y
*i !{ It e

Attachment A
This project is designed to capture water from two seeps located at the toe -of -slope of the Mayo
Steam Station ash pond dam. The seepage collection system will capture and reroute collected
water back into the ash pond. The proposed impacts to Streams 2 and 3 (see Figure 5) include
permanent and temporary impacts (Drawing 1). Permanent impacts include the placement of
pre -fabricated sump boxes and seepage collections systems in the stream channels to collect the
seepage water. Temporary impacts include rock check dams downstream of the sump box
construction areas to capture sediment that may result from the in -stream construction activities.
Sediment accumulated behind the check dams will be removed and placed in upland disposal
areas once construction activities are completed. The check dams will be removed and the pre -
construction site conditions restored. The narratives below provide detailed descriptions of the
proposed project impacts.
Mayo Seepage Plan Narrative (West Box)
The following steps constitute the effort to collect and reroute baseflow, including seepage,
located at the base of the main ash pond dam. Please refer to the design drawings for locations
of select construction components.
1. Erosion and sedimentation control features will be installed prior to all construction
activities.
2. Sandbags will be placed upstream of the proposed construction area to dam baseflow in
the channel. These sandbag measures are temporary and will only be required during
the proposed construction activities.
3. A trash pump will be installed in the channel upstream of the sandbags and used to
bypass channel baseflow during construction.
4. Erosion control measures will be placed across the channel immediately downstream of
the construction area.
5. A 5'x7'x5' exterior (4'x6'x4' interior) precast, reinforced concrete box will be installed
within the channel. The box will be buried 4' below the channel bottom. The box top will
be approximately 18± inches above the channel bottom.
6. A new 6" PVC line laid approximately on the channel bottom will be installed from the
existing weir box to the new precast sump box (±20'). In addition, a small drainage
system of 2" y slotted PVC pipe will be laid approximately within the channel limits as
part of the collection system. Upon installation of all pipes, a 6" layer of #39 washed
railroad ballast stone will be installed to provide cover over the pipes.
7. A duplex pump system to external discharge lines will be installed in the concrete box to
recover inflow and discharge the water to the adjacent ash pond. Each pump will be
equipped with float switches for low level pump -off and normal level pump -on.
8. Temporary power supply to the pumps will be provided by mobile, diesel, generators,
located adjacent to the channel areas until permanent power can be installed.
9. The downstream erosion control measures will be removed.
10. The upstream trash pump and sandbags will be removed.

Mayo Seepage Plan Narrative (East Box)
The following steps constitute the effort to collect and reroute baseflow, including seepage,
located at the base of the main ash pond dam. Please refer to the design drawings for locations
of select construction components.
1. Erosion and sedimentation control features will be installed prior to all construction
activities.
2. Sandbags will be placed upstream of the proposed construction area to dam baseflow in
the channel. These sandbag measures are temporary and will only be required during
the proposed construction activities.
3. A trash pump will be installed in the channel upstream of the sandbags and used to
bypass channel baseflow during construction.
4. Erosion control measures will be placed across the channel immediately downstream of
the construction area.
5. A 5'x7'x5' exterior (4'x6'x4' interior) precast, reinforced concrete box will be installed
within the channel. The box will be buried 4' below the channel bottom. The box top will
be approximately 18± inches above the channel bottom.
6. A new 6" PVC line laid approximately on the channel bottom will be installed from the
existing weir box to the new precast sump box (±20'). In addition, a small drainage
system of 2" cp slotted PVC pipe will be laid within and adjacent to the channel limits as
part of the collection system. Upon installation of all pipes, a 6" layer of #39 washed
railroad ballast stone will be installed to provide cover over the pipes.
7. A duplex pump system to external discharge lines will be installed in the concrete box to
recover inflow and discharge the water to the adjacent ash pond. Each pump will be
equipped with float switches for low level pump -off and normal level pump -on.
8. Temporary power supply to the pumps will be provided by mobile, diesel, generators,
located adjacent to the channel areas until permanent power can be installed.
9. The downstream erosion control measures will be removed.
10. The upstream trash pump and sandbags will be removed.

tej F=y I o v', '&SC -IDI C, 12 2 Z I "r"k \M,- '61r 'r 44' \-O, F[ tiMITM- P-AN,'l J, /,N�
n m C3
0
0
X
z
m
O
0 0 X M X X X X X X
0 Z > , m
< M M
>
m 0 z 0 0 0 0 0
m
oo�O,M-2 "0
x
cl 2 > 0 , m I >m
> - t'� z
K In , -
Z In o 0
M m z Z
I ,
0 0
C
U) T cn
x X x K
K z ju
m >
z -M
--i
AO)O—co
Cn W -n
> 7n
(n cn
I —
6 DNIMVJ(l
m ml
m ol
AUHASSA
> m z zR�t'�
m
90
z-
93
mx
mn
p -n am
3
A,
�z
To
ti
W
10. z
>
Im 10
-<
0
M
U)
zcm
M
>
m
m
M
z;v
<
C/) cl)
.1
0
0
>
C
>
m -0
m
�a
z
,.
o > , 0
-n
0
>
§ 0,
I >
z z
:5 -
z
M T
m
z
0
o m
;m
1,
;o
—
< (n
0
0
m z
z
>
C)
0
>
C:
z
z
z
>z 0
Z
O
0
i n
I —
6 DNIMVJ(l

Platted 9 _ _ _•w May, Seepage Pia, L wm., _VlEW INSETS» May 17 2016 _,_ ,\D,k ,_9,\M 7810150445 , _ e_. m PERMITTING PLA _,mP . m
�
;
!§ m §
&
-- ----§/
_
°w
n
§)
- ----2;
1-
�
,4)
,
M
�
-- ----)§
k,
§
�4
m§
2{
�
(0
§
■■
|■
.�.
0 !
-
}
\go
,\ /]
��'
) )
},
-- ---M2
®
m)
k
{
m k
���_,|!§
ƒ
,
; !|�-■ E;
ƒ2§
�
� �ILA�
j
/
f
~ , §
°
\
\
z C
M
>
M
§ § >
o
;
>
o
!
) m
Q 9 n
,
o
}
z 0:E0
k /
O
§
Fn
-
X
~
0 v
M
:5§ Z
§|;&k
n §
/ z
)°§
f
/
�
2{/,;|�!
|§!
�
�
°^
ZSNpV?JQ
n
>