2016 annual dam and dike inspection report...annual inspection. the interior geometry changed with...

2016 Annual Dam and Dike Inspection Report

Ash Pond Complex

Conesville Plant

AEP Generation Resources, Inc.

Coshocton County, Ohio

November 30, 2016

Prepared for: AEP Generation Resources – Conesville Plant

Conesville, Ohio

Prepared by: American Electric Power Service Corporation

1 Riverside Plaza

Columbus, OH 43215

GERS-16-155

---Page Intentionally Left Blank---

Pages 3 of 8

Table of Contents

1.0 Introduction ..................................................................................................................4

2.0 Description of CCR Impoundments ...........................................................................4

3.0 Review of Available Information ................................................................................4

4.0 Inspection ......................................................................................................................4 4.1 Metals Cleaning Waste Tank Dike .............................................................................4

4.2 Fly Ash Pond Complex ..............................................................................................5

4.2.1 Changes in Geometry Since Last Inspection .......................................................5

4.2.2 Instrumentation ....................................................................................................5

4.2.3 Impoundment Characteristics ..............................................................................5

4.2.4 Visual Inspection .................................................................................................6

4.2.5 Changes that Effect Stability or Operation ..........................................................6

5.0 Summary of Findings ..................................................................................................6 5.1 General Observations .................................................................................................6

5.2 Maintenance Items .....................................................................................................6

5.3 Items to Monitor .........................................................................................................7

5.4 Deficiencies ................................................................................................................8

Attachments Attachment A – Pictures

Attachment B – Site Maps

Attachment C – Instrumentation Data

Pages 4 of 8

1.0 INTRODUCTION

This report was prepared by AEP- Geotechnical Engineering Services (GES) section, in part, to fulfill

requirements of 40 CFR 257.83 and the Ohio Department of Natural Resource (ODNR), Division of Water

Dam Inspection Section and to provide AEP Generation Resources and the Conesville Power Station with

an evaluation of the facility.

Mr. Cyril Burkhart, Landfill Supervisor for the Conesville Plant provided onsite coordination for inspection

activities. The inspection was performed on October 25, 2016 by Brian Palmer of AEP Geotechnical

Engineering. Also onsite for the inspection were Beth Mullen and Tony McClain from the Conesville Plant.

Weather conditions were sunny with temperatures in mid-30̊s F to Lower-60̊s F, the day started foggy and

was clear and sunny at the end of the inspection.

2.0 DESCRIPTIONS OF IMPOUNDMENT

The Ash Pond Complex is comprised of diked embankments on the north, southeast, and south sides.

County Road 273 runs along the toe of the north dike, a Plant haul road run along the top of the north dike,

and a coal haul road runs along the crest or exterior of the Southeast dike. The northwest side of the Ash

Pond Complex is located adjacent to a closed landfill area. There are three main ponds within the Ash

Pond Complex as listed below.

List of Main Ponds within the Ash Pond Complex

Fly Ash Pond

Bottom Ash Pond

Clearwater Pond

The Fly Ash Pond has internal splitter dikes that divide it into areas referred to as Ponds 1, 2, 3, and 4. The

Bottom Ash Pond has an internal splitter dike creating the Bottom Ash Pond and Pond 5. Water enters the

Ash Pond complex through either the Bottom Ash Pond or Pond 1. From the Bottom Ash Pond or Pond 1

water flows through the Ash Pond Complex in order from Pond 2, Pond 3, Pond 4, and Pond 5 before

reaching the Clearwater Pond where it is discharged to the Holding Pond.

The Inspection included the Dike for the Metals Waste Cleaning tank as it is adjacent to the South dike of

the Ash Pond complex

3.0 REVIEW OF AVAILABLE INFORMATION (257.83(b)(1)(i))

A review of available information regarding the status and condition of the Ash Pond Complex, which

include files available in the operating record, such as design and construction information, previous

periodic structural stability assessments, previous 7 day inspection reports, and previous annual inspections

has been conducted. Based on the review of the data there were no signs of actual or potential structural

weakness or adverse conditions.

4.0 INSPECTION (257.83(b)(1)(ii))

4.1 METALS CLEANING WASTE TANK DIKE (NON-CCR)

A visual inspection of the dike for Metals Cleaning Waste Tank was conducted to identify any signs

of distress or malfunction of the secondary containment system. Overall the facility is in good

condition. The secondary containment is functioning as intended with no signs of potential structural

weakness or conditions which would be disruptive to the safe operation of the containment system.

Inspection photos are included in Appendix A. Additional pictures taken during the inspection can be

made available upon request. Figures of the Metals Cleaning Waste Tank are included in Appendix

B.

Pages 5 of 8

4.2 ASH POND COMPLEX

4.2.1 CHANGES IN GEOMETRY SINCE LAST INSPECTION (257.83(b)(2)(i))

No modifications have been made to the exterior geometry of the Ash Pond Complex since the 2015

annual inspection. The interior geometry changed with the addition of the splitter dike in the Bottom

Ash Pond creating Pond #5, the abandonment of the old outfall structures from Pond #4 and #5 into

the Clearwater Pond and the installation of new culverts to manage flow through the pond complex.

4.2.2 INSTRUMENTATION (257.83(b)(2)(ii))

The location and type of instrumentation is shown on Figure 7 in Appendix B. The maximum

recorded readings of each instrument since the previous annual inspection is shown in Table 1

below.

Table 1 – INSTRUMENTATION DATA

Ash Pond Complex

Instrument Type

Maximum Reading

since last annual

inspection

Date of reading

B7 Piezometer 736.64 4/28/16

P-11 Piezometer 729.24 3/3/16

P-12 Piezometer 749.91 11/12/15

P-13 Piezometer 750.48 1/7/16

B-0901 Piezometer 729.54 3/3/16

B-0902 Piezometer 756.19 8/18/16

B-0903 Piezometer 747.17 11/12/15

B-0904 Piezometer 744.12 3/3/16

Piezometers readings were generally consistent since the last inspection with the exception of B-7

which had an unexplained high reading in April 2016. A graph of the piezometer readings is

included in Attachment C.

4.2.3 IMPOUNDMENT CHARACTERISTICS (257.83(b)(2)(iii, iv, v))

Table 2 is a summary of the minimum, maximum, and present depth and elevation of the impounded

water & CCR since the previous annual inspection; the storage capacity of the impounding structure

at the time of the inspection; and the approximate volume of the impounded water and CCR at the

time of the inspection.

Table 2 – IMPOUNDMENT CHARACTERISTIC DATA

Impoundment Characteristics Ash Pond Complex

Approximate Minimum depth of impounded water since last annual inspection <1-ft

Approximate Maximum depth of impounded water since last annual inspection ~20-ft

Approximate Present depth of impounded water at the time of the inspection ~10 ft (avg)

Approximate Minimum depth of CCR since last annual inspection ~6-ft

Approximate Maximum depth of CCR since last annual inspection ~32-ft

Approximate Present depth of CCR at the time of the inspection ~15-ft (avg)

Storage Capacity of impounding structure at the time of the inspection 2,500 ac-ft.

Approximate volume of impounded water at the time of the inspection ~780 ac-ft.

Approximate volume of CCR at the time of the inspection 1,100 ac-ft

Notes:

1. Water and CCR elevations vary across the Ash Pond Complex

2. Values based on observations, bottom elevation of 730, max. operating pool of 762

Pages 6 of 8

4.2.4 VISUAL INSPECTION (257.83(b)(2)(i))

A visual inspection of the Ash Pond Complex was conducted to identify any signs of distress or

malfunction of the impoundment and appurtenant structures. The inspection also included hydraulic

structures underlying the base of the dike. Specific items inspected included all structural elements of

the dam such as inboard and outboard slopes, crest, and toe; as well as appurtenances such as the

outlet structure at the Bottom Ash Pond and Clearwater Pond, and pipe discharge structure.

Overall the facility is in good condition. The impoundment is functioning as intended with no signs of

potential structural weakness or conditions which are disrupting to the safe operation of the

impoundment. Inspection photos are included in Appendix A. Additional pictures taken during the

inspection can be made available upon request. Figures of the Ash Pond Complex are included in

Appendix B.

4.2.5 CHANGES THAT EFFECT STABILITY OR OPERATION (257.83(b)(2)(vii))

Based on interviews with plant personnel and field observations there were no changes to the Ash

Pond Complex since the last annual inspection that would affect the stability or operation of the

impounding structure.

5.0 SUMMARY OF FINDINGS

5.1 GENERAL OBSERVATIONS

The following general observations were identified during the visual inspection:

Metals Cleaning Waste Tank Dike

1) The outboard slopes, crest and inboard slopes of the embankment were generally in good

condition. The embankments did not show any signs of structural weakness or instability. The

vegetation along the embankments was well established. The interior membrane liner

appeared to be in satisfactory condition. The crest did not contain any ruts or other signs of

instability. Specific maintenance and items to monitor are described in the subsequent sections

of this report.

Ash Pond Complex

2) The outboard slopes, crest and inboard slopes of the embankments were generally in good

condition. The embankments did not show any signs of structural weakness or instability. The

vegetation along the embankments was well established. The crest did not contain any ruts or

other signs of instability. Specific maintenance and items to monitor are described in the

subsequent sections of this report.

3) The hydraulic structure from the Clearwater Pond were generally in good condition. There

were no signs of deterioration of the concrete or steel structures. Stop logs were available for

use. Flow within the pipes appeared unobstructed. Specific maintenance and items to monitor

are described in the subsequent sections of this report.

5.2 MAINTENANCE ITEMS

The following maintenance items were identified during the visual inspection, see inspection map for

locations:


1) No specific items identified related to the Metals Cleaning Waste Tank Dike.

Pages 7 of 8

Ash Pond Complex

2) The lack of booms around the outlet structure in the Clearwater Pond has allowed floating

debris to enter the Wastewater Holding Pond. Recommend booms around the outlet structure

to minimize the discharge of floating debris to the Wastewater Holding Pond.

3) The Exterior slope of the south dike had an area above the MCWT dike that has been

previously identified for lack of vegetation. (Photo 6) Plant noted that the area has become a

Canadian Geese nesting area which limits the ability to re-establish vegetation. Recommend

deploying deterrents (e.i. erosion control matting) in area to assist with the establishment of

grass.

4) Interior of Southeast slope has former animal borrows and a stabilized erosion gully that are

unable to be mowed (Photo 16). The lack of mowing has allowed woody vegetation to start to

be established. Area needs to have the vegetation removed and the surface repaired to allow

proper mowing.

5) Isolated woody plants (autumn olive) have started to be established on the interior and exterior

(below coal haul road) of the southest dike (Photos 18 & 29). Woody vegetation (primarily

autumn olive) have established along the exterior toe (Photos 29 & 32). Trees become have

established on the embankment above the outfall discharge pipe (Photo 27 & 28). Plant needs

to work to remove the vegetation and clear a path along the toe in compliance with AEP

Circular letter and ODNR Dam Safety Regulations.

6) Abandoned culverts (See Photo 31) under original coal haul road need to be video inspected

and a disposition plan be developed for these culverts in conjunction with the long-term

modification/closure of the Ash Pond Complex.

7) The vegetation in the road side ditch along County Road 273 at the toe of the North dike and the

cattail area at the east end of the North dike need to be maintained.

5.2 ITEMS TO MONITOR

The following items were identified during the visual inspection as items to be monitored, see

inspection map for locations:


1) No specific items identified related to the Metals Cleaning Waste Tank Dike.

Ash Pond Complex

2) Exterior area of the South dike west of MCST dike had tree sapling growing with the grass.

(Photo 2.2). Mowing will control growth, area needs to be monitored and evaluated if more

direct measures need to be taken.

3) Previous inspections have identified the standing water in the road side ditch along County

Road 273 at the toe of the North dike. Clearing of the downstream drainage channel appears

to have eliminated this issue. Continue to monitor toe and ditch for standing water and

coordinate corrective actions as needed.

Pages 8 of 8

5.3 DEFICIENCIES (257.83(b)(2)(vi))

There were no signs of structural weakness or disruptive conditions that were observed at the time of

the inspection that would require additional investigation or remedial action. There were no

deficiencies noted during this inspection or any of the periodic 7-day or 30-day inspections. A

deficiency is defined as either 1) uncontrolled seepage, 2) displacement of the embankment, 3)

blockage of control features, or 4) erosion, more than minor maintenance. If any of these conditions

occur before the next annual inspection contact AEP Geotechnical Engineering immediately

If you have any questions with regard to this report, please contact Brian Palmer at 614-716-3382

(Audinet: 200-3382) or Gary Zych at 614-716-2917 (Audinet: 200-2917).

Appendix A

2016 DAM AND DIKE INSPECTION

CONESVILLE PLANT

METALS CLEANING WASTE TANK DIKE AND ASH POND COMPLEX

INSPECTION PHOTOGRAPHS

--INTENTIONALLY LEFT BLANK--

Appendix A, Conesville Metals Cleaning Waste Tank (MCWT) Dike and Ash Pond Complex

Inspection Photographs

Photographs taken on October 25, 2016

I:\Dam & Dike Inspections\DIMP 2016\Conesville\Engineering Inspection Report\Appendix A.docx Page 1 of 14

Photograph No. 1

Looking East along crest of South

MCWT dike – General Condition

Photograph No. 2

Looking west along toe of south

MCWT dike – General Condition

Photograph No. 3

Crest/Interior of East MCWT dike

looking north – General Condition





Photograph No. 4

Toe/Exterior of East MCWT dike

looking south – General Condition

Photograph No. 5

Crest of liner for MCWT common

Dike with Ash Pond Complex –

General Condition

Photograph No. 6

Unvegetated area of APS south dike

above MCWT dike. Staff report

goose nesting hampering

establishment of vegetation.





Photograph No. 7

Crest/interior of west MCWT dike

looking North – General Condition

Photograph No. 8

Toe/Exterior of west MCWT dike

looking south. – General Condtion

Photograph No. 9

Toe/exterior of south dike of Ash

Pond Complex looking west from

MCWT dike. – General condition





Photograph No. 10

Start of woody vegetation on

exterior of south dike of Ash Pond

Complex. Continue mowing to

control and monitor.

Photograph No. 11

Crest of South Dike looking East

from west corner – General

Condition

Photograph No. 12

Bottom Ash discharge structure.





Photograph No. 13

Crest/Interior of Northwest dike

along bottom ash pond looking

North – General Condition

Photograph No. 14

Crest/exterior of Northwest dike

along bottom ash pond looking

South – General Condition

Photograph No. 15

Interior/Toe Southeast dike near

northeast corner, looking south –

General Condition





Photograph No. 16

Area of rough ground on interior of

southeast dike near north end that is

unable to be mowed and is starting

to develop woody vegetation.

Photograph No. 17

Interior toe of southeast dike Pond 3

area looking North – General

condition

Photograph No. 18

Interior slope of Southeast dike at

Pond 4, high vegetation with some

woody vegetation starting to be

established.





Photograph No. 19

Work to develop access along

interior slope of Pond 4 area to

allow safe maintenance of slope.

Photograph No. 20

Interior Crest of Southeast dike with

coal haul road looking north –

General Condition

Photograph No. 21

Interior of Southeast dike as it starts

to raise above the coal haul road

looking north – general condition





Photograph No. 22

Crest where Southeast dike starts to

raise above the coal haul road

looking south – general condition

Photograph No. 23

Exterior of Southeast dike at Coal

Haul road looking north near

southern corner – general condition.

Photograph No. 24

Crest/Interior of Southeast dike

from Southern corner looking north

– General Condition.





Photograph No. 25

Crest/Interior of South dike looking

west from East corner – general

condition.

Photograph No. 26

Toe/exterior of south dike looking

west from east corner – general

condition.

Photograph No. 27

Southeast dike below haul road

looking at access towards discharge

structures. Trees on embankment.





Photograph No. 28

Outlet end of discharge from

Clearwater Pond outlet structure. –

general condition.

Photograph No. 29

Exterior/Toe area of Southeast dike

below coal haul road – woody

vegetation on slope and

encroaching on toe.

Photograph No. 30

Stabilized erosion area on Southeast

Dike below Coal Haul Road.





Photograph No. 31

Former culverts at toe of Southeast

dike below coal haul road. – Pipes

to be videoed to verify condition.

Photograph No. 32

Toe of Southeast Dike looking

south. Excessive woody vegetation

at the toe.

Photograph No. 33

Exterior of North dike Looking

West – General Condition





Photograph No. 34

Cattail area at toe of North Dike.

Photograph No. 35

Toe of North dike looking East near

end of Ash Pond Complex – general

condition

Photograph No. 36

Exterior slope of North Dike

looking East near end of Ash Pond

Complex. – general condition





Photograph No. 37

Crest of North Dike looking East

near end of Ash Pond Complex. –

general condition

Photograph No. 38

Interior slope of North Dike looking

East near end of Ash Pond

Complex. – general condition

Photograph No. 39

Toe/Interior slope of North Dike

looking west from northeast corner

of Ash Pond Complex. – general

condition





Photograph No. 40

Ash Pond Complex Outlet Structure

in Clearwater pond – General

Condition

Photograph No. 41

Discharge over stoplogs at Ash

Pond Complex Outlet Structure.

ATTACHMENT B

Inspection / Instrumentation Location Maps

GROUND OBSCURED

750

745

745745

750

750

755

760

760

765

765

X745.1

X745.4

X745.4

X746.8

X745.5

X747.1

X747.2

X747.4

X770.1

X756.8

X768.8

X744.3

DATE:

SCALE:1"=60'

DRN BY:GRS

1 RIVERSIDE PLAZA

COLUMBUS, OH 43215

AEP SERVICE CORP.

DWG NO:FIGURE 2CONESVILLE POWER STATION

SHEET 2 of 7

METAL CLEANING TANK

PL

OT

DA

TE:11/28/2016

PL

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ME:9:4

9:5

8

AM

s259464

BY:

189600 189600

189800 189800

2143200

21

43

20

0

2143400

21

43

40

0

METAL CLEANING TANK

W E

NPOND #5

750

750

750

760

760

760

760

760

760

760

760

760

760

760

760

760

770

770

770

780

790

CONVEYOR

748.65

104

755.3W.E.

763.6

762.7

766.7

762.2

775.1

774.7

761.5762.6

773.2

762.9

763.5

765.5

763.8

775.4

775.9

759.6

751.6

750.9

747.3

760.6

758.7

750.9

751.3

747.5

797.3

796.5

761.6756.9

750.7

766.6

759.7

759.6

759.2

767.4

758.3

757.1

757.8

767.1

768.3

768.7

767.2

762.3

767.4

767.1

766.4

751.5

749.4

759.3

758.5

763.1

763.6

761.6

768.7

766.7

757.3

761.1

761.2

755.2

768.9757.8

804.7

749.4762.7

747.5

747.1

752.2

774.8

755.6

750.7

768.2

759.6

757.8

765.1

765.6

764.2800.2

763.2759.4

769.4

755.7

763.8

762.3

766.7763.9

762.3 762.9

764.5

764.2

764.4

764.7

780.6

778.4

769.9

761.9

766.4

768.4

775.7

768.8

768.8

766.5

764.8

759.1

762.4

GROUND OBSCURED

765

745

750

745

740

745

745

745745

750

750

750

750

750

750

755

755

755

755

760

760

760

760

760

760

765

765

765

X752.1

X752.3

X759.5

X770.0

X743.1

X742.7

X744.9

X745.4

X745.1

X744.9

X745.1

X745.4

X745.4

X746.8

X745.5

X747.1

X747.2

X747.4

X770.1

X769.4

X770.0

X756.8

X768.8

X744.3

X749.7

X751.7X753.2

X750.5

X749.1

X746.8

3-16-05 AERIAL MAPPING

RAISED 1.22'

AERIAL MAPPING

MATCHES 10-31-05

W E

N

DATE:

SCALE:1"=200'

DRN BY:

1 RIVERSIDE PLAZA

COLUMBUS, OH 43215

AEP SERVICE CORP.


SHEET 3 0F 6

ASH POND COMPLEX

PL

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6:0

1 A

Ms259464

BY:

POND #5

CLEA

R W

ATER P

OND

POND #2

BOTTOM ASH POND

21

43

00

02143000

191000

2143500

21

44

00

02144000

21

43

50

0

190000

189500189500

190000

191000

190500190500

POND #4

760

760

760

760

760

760

770

780

DOCK

758.1

758.1W.E.

W.E.

760.9

761.2

761.3

760.5

760.9

765.5

763.1

766.7

757.3

767.6

769.3

767.1

761.2

762.7

763.7

765.4

758.8

763.3

758.9

757.9

759.7

767.5

758.9

766.8

755.2

761.5

766.4

770.5

777.3

784.4

768.2

766.4

757.8

764.3

765.7

770.9

763.1

W E

N

DATE:

SCALE:1"=200'

DRN BY:

1 RIVERSIDE PLAZA

COLUMBUS, OH 43215

AEP SERVICE CORP.


SHEET 4 0F 6

ASH POND COMPLEX

PL

OT

DA

TE:11/28/2016

PL

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TI

ME:9:2

5:2

4

AM

s259464

BY:

POND #3

POND #4

2145000

21

44

50

02144500

21

45

50

02145500

21

45

00

0190500

190000190000

191000191000

190500

740

750

760

760

770

770

770

770

770

780

780

790

800

760.2W.E.

797.4760.3

801.1

770.9

803.2

764.9

806.6

806.7804.9

809.2

770.5

749.3

760.9

761.2

761.3

760.5

760.9

760.3

760.3

760.4

760.5

759.9

763.1

763.1

758.9

757.9

759.7

767.5

758.9

803.6

805.3

777.3

784.4

789.1

793.4

797.4

807.2

809.5

740.7

774.5772.9773.1

767.4766.4

738.7737.8

770.9

763.1

759.9

771.1

772.1806.1

W E

N

DATE:

SCALE:1"=200'

DRN BY:

1 RIVERSIDE PLAZA

COLUMBUS, OH 43215

AEP SERVICE CORP.


SHEET 5 0F 6

ASH POND COMPLEX

PL

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PL

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2:4

3

AM

s259464

BY:

POND #3

POND #4

2146000

21

45

50

02145500

21

46

50

02146500

21

46

00

0

191500

191000191000

192000192000

191500

740

750

750

760

760

760

760

760

760

760

760

770

770

770

770

780

790

810

808.80

105

760.2W.E.

758.1W.E.

749.6W.E.

761.5

760.9758.7

758.2

758.5

760.5757.3

758.3

757.4

760.7

759.1

760.4759.1

759.3

760.3

760.7

760.5

760.8

761.3

760.5761.1811.7

760.4760.8

766.9

760.9

760.7

761.2

762.7

763.7

765.4

762.1

765.3

759.1

767.2

757.9

759.7

767.5

758.9

766.8

768.9

759.8

772.9773.1

767.4

773.9773.3773.5773.7

773.9

737.8737.8736.8

736.5737.1737.7

737.5

764.5

762.3

762.3

762.4

766.2

757.7

762.9

765.7

763.2

767.9

751.7

752.2

750.8

750.8

751.7

757.7

757.9

756.9

757.6

756.9

766.7

759.9

762.4

762.1

759.9

762.7

762.8

766.4

768.3

765.7

761.2

W E

N

DATE:

SCALE:1"=200'

DRN BY:

1 RIVERSIDE PLAZA

COLUMBUS, OH 43215

AEP SERVICE CORP.


SHEET 6 0F 6

ASH POND COMPLEX

PL

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PL

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9:5

4

AM

s259464

BY:

POND #4

POND #3

POND #2

POND #1

21

44

00

02144000

192500

2144500

21

45

00

02145000

21

44

50

0

191500

191000191000

191500

192500

192000192000

107742.97

765

745

750

745

740

745

745

745

745745

750

750

750

750

750

750

755

755

755

755

760

760

760

760

760

760

765

765

765

X746.8

X745.0

X743.3

X752.1

X752.3

X759.5

X770.0

X743.1

X742.7

X744.9

X745.4

X745.1

X744.9

X744.8

X743.2

X742.6

X743.3

X743.1

X745.1

X745.4

X745.4

X746.8

X745.5

X747.1

X747.2

X747.4

X770.1

X769.4

X770.0

X756.8

X768.8

X744.3

X749.7

X751.7X753.2

X750.5

X749.1

X746.8

740740

750

750

750

750

750

750

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

760

770

770

770

770

770770

770

770

770

770

770

770

770

770

780

780

780

780

780

790

790

790

790

800

800

800

810

810

DOCK

CONVEYOR

748.65

808.80

104

105

760.2W.E.

758.1

758.1W.E.

W.E.

749.6W.E.

755.3W.E.

797.4760.3

801.1

770.9

803.2

764.9

806.6

806.7804.9

809.2

770.5

749.3

763.6

762.7

766.7

762.2

775.1

774.7

761.5762.6

773.2

759.3773.1773.5

759.3

760.9758.7

761.2758.9

761.3758.2

758.5

760.5757.3758.4

811.8

760.9758.3

760.3

760.3757.4

760.4815.6

760.5760.7

759.9759.1815.6

760.4759.1

813.4816.8

759.3

760.3

760.7815.9

760.5811.1

760.8814.9

761.3815.1

760.5761.1811.7

812.8

760.4760.8

766.9

760.9

760.7

762.9

763.5

765.5

763.8

763.1

763.1

775.4

775.9

759.6

771.4

751.6

750.9

747.3

760.6

758.7

750.9

751.3

752.7

752.7

764.4

747.5

797.3

796.5

761.6756.9

750.7

766.6

759.7

759.6

759.2

767.4

758.3

757.1

757.8

767.1

768.3

768.7

767.2

762.3

767.4

767.1

766.4

751.5

749.4

759.3

758.5

763.1

763.6

761.6

768.7

766.7

757.3

767.6

769.3

767.1

761.1

761.2

762.7

763.7

765.4

762.1

765.3

759.1

767.2

758.8

763.3

758.9

757.9

759.7

767.5

758.9

766.8

768.9

759.8803.6

805.3

755.2

761.5

766.4

770.5

777.3

784.4

789.1

793.4

797.4

807.2

809.5

740.7

774.5772.9773.1

767.4766.4

773.9773.3773.5773.7

773.9773.9

738.7737.8

737.8736.8736.5737.1

737.7737.5

764.5

762.3

762.3

762.4

767.0

766.2

774.4

751.4

768.9757.8

804.7

749.4762.7

747.5

747.1

752.2

774.8

774.1

755.6

750.7

768.2

759.6

757.8

765.1

765.6

764.2800.2

763.2759.4

769.4

755.7

763.8

762.3

766.7763.9

816.1

757.7

762.3 762.9

764.5

764.2

764.4

764.7

780.6

778.4

769.9

761.9

766.4

768.4

775.7

768.8

768.8

766.5

764.8

759.1

762.4

765.7

763.2

767.9

751.7

752.2

750.8

750.8

751.7

757.7

757.9

768.2

756.9

757.6

756.9

766.7

759.9

762.4

762.1

759.9

762.7

762.8

766.4

768.3

757.8

764.3

765.7

770.9

763.1

759.9

771.1

772.1806.1

774.3

761.2

IMAGERY DATE: MARCH 2006

UNIT: U.S. SURVEY FEET

ZONE: OHIO NORTHERN

DATUM: NORTH AMERICAN DATUM OF 1983 (NAD83)

HORIZONTAL CONTROL:

W E

N

21

44

00

02144000

2144500

2145000

21

44

50

0

2143000

21

42

50

0

21

43

00

0

21

43

50

02143500

21

45

00

0

2147000

21

46

50

0

21

47

00

0

21

47

50

02147500

21

45

50

02145500

2146000

2146500

21

46

00

0

190500

190000

190500

191000191000

189000189000

189500

190000

189500

191500

21

41

50

02141500

2142000

2142500

21

42

00

0

192000

191500

192000

192500192500

P13

P11

B-7

PZ-0901

PZ-0902

PZ-0903

PZ-0904

P12

DATE:

SCALE:1"=400'

DRN BY:AG

1 RIVERSIDE PLAZA

COLUMBUS, OH 43215

AEP SERVICE CORP.


INSTRUMENTATION PLAN

ASH POND COMPLEX

PL

OT

DA

TE:

PL

OT

TI

ME:

BY:s252086

3:4

2:2

0

PM

12/8/2016

ATTACHMENT C

Instrumentation Data

Dates BAP FAP CWP B-6 B-7 B-11 B-12 B-13 B-0901 B-0902 B-0903 B-0904

3/9/2009 754.18 758.44 752.94 DR 724.67 726.78 747.75 749.8 NR NR NR NR

6/30/2009 754.72 757.95 753.48 DR 724.67 726.78 747.75 749.8 725.79 NR 724.47 742.8

9/28/2009 755 757.91 753.45 DR 722.43 724.87 745.55 749.8 725.23 760.07 724.39 743.02

12/31/2009 757.2 758.13 753.92 DR 724.32 726.18 746.17 749.77 727.15 759.63 NR 743.02

3/31/2010 757.96 758.13 753.98 DR 728.48 730.52 747.19 749.82 730.95 760.92 748.02 743.15

6/21/2010 756.8 757.07 753.86 DR 726.9 728.59 748.03 749.77 729.19 759.64 744.04 743.19

9/29/2010 753.891 757.275 752.554 DR 722.65 725.17 746.42 749.73 726.18 755.18 729.68 742.91

12/31/2010 755.567 757.91 754.18 DR 723.79 726.1 747.53 750.22 727.28 755.98 744.12 743.1

3/31/2011 754.94 757.43 753.89 DR 730.13 732.1 748.96 749.7 732.06 757.27 746.81 743.26

6/29/2011 757.66 757.95 754.48 DR 725.73 728.13 750.35 749.73 728.87 756.83 747.67 743.37

9/29/2011 755.65 758.09 753.94 DR 723.02 725.57 750.11 749.72 726.77 756.09 747.88 743.52

12/22/2011 753.7 757.9 753.2 DR 728.13 730.25 749.72 749.77 731.39 757.24 747.72 743.65

3/29/2012 754.34 757.99 753.19 DR 725.49 727.62 749.85 749.76 728.73 756.85 747.84 743.46

6/29/2012 757.36 758.11 753.65 DR 722.16 725.07 750.57 749.76 726.01 755.98 748.63 743.47

9/20/2012 NF 758.65 752.63 DR 722.31 725.19 749.3 749.79 726.64 756.32 747.28 743.4

12/5/2012 NF 757.41 752.63 DR 722.5 725.44 748.61 749.77 725.79 755.62 746.86 743.52

3/12/2013 NF 756.94 752.52 DR 724.49 727.29 748.84 749.21 728.43 756.22 747 743.38

6/5/2013 NF 757.28 752.63 DR 722.36 724.97 749.49 744.62 726.58 756.76 747.45 743.37

12/19/2013 NF 757.95 752.74 DR 722.2 726.19 748.84 750.07 728.15 756.63 747 743.99

3/24/2014 NF 758.45 752.08 DR 724.67 728.37 748.65 749.72 728.93 757.24 746.1 743.34

6/5/2014 NF 757.05 753.14 DR 725.2 727.65 749.45 749.79 728.43 756.44 746.75 743.37

9/3/2014 NF 757.45 753.24 DR 723.9 725.57 748.75 748.92 727.93 755.14 747.1 743.07

3/9/2015 754.6 757.75 753.04 DR 720.9 725.57 749.85 748.92 726.88 754.99 749.6 743.07

6/18/2015 754.6 757.05 752.64 DR 720.02 725.69 750.14 749.64 727.5 755.23 747.54 743.39

9/24/2015 754.6 757.5 754.14 DR NR 725.23 749.71 749.77 726.19 754.46 747.15 743.58

11/12/2015 NR NR 753.04 DR 720.57 725.16 749.91 750.01 726.09 754.5 747.17 743.61

12/10/2015 753.4 NR 753.54 DR 722.04 729.24 747.6 749.78 729.54 755.19 743.69 744.12

1/7/2016 NR NR 754.54 DR 722.95 726.09 747.44 750.58 728.73 755.30 745.01 743.32

2/4/2016 NR NR 754.64 DR 722.61 725.86 747.25 750.10 727.08 754.83 744.44 743.27

3/3/2016 753.7 NR 753.54 DR 722.04 729.24 747.60 749.78 729.54 755.19 743.69 744.12

3/31/2016 NR NR NR DR 722.35 728.32 747.55 750.47 728.18 755.54 744.35 743.37

4/28/2016 NR 757.48 753.94 DR 736.64 725.62 747.49 749.80 728.47 755.14 743.89 743.22

5/26/2016 NR 757.78 754.4 DR 723.93 727.13 747.63 750.27 727.96 755.79 744.78 743.20

6/23/2016 NR 757.88 754.74 DR 723.13 725.39 748.13 749.77 727.79 755.64 744.25 743.13

7/21/2016 NR 757.88 754.74 DR 721.18 725.10 747.69 749.81 725.81 755.47 744.65 743.19

8/18/2016 NR 758.98 754.6 DR 722.04 725.21 748.29 749.80 725.99 756.19 745.64 743.41

9/12/2016 NR 757.98 753.5 DR 722.98 725.04 747.85 749.72 727.78 755.79 744.82 743.18

10/10/2016 NR 757.68 752.5 DR 722.65 725.02 747.70 749.08 727.61 755.90 744.79 743.13

11/7/2016 NR 756.58 753.2 DR 721.83 725.08 747.01 749.36 725.92 754.81 745.68 743.01

NF - No Flow

Table C1- Summary of Instrumentation Data.

DR - Destroyed

ND - No data

NR - No Reading

DM - Damaged

715

720

725

730

735

740

745

750

755

760

ELE

VA

TIO

N, F

EE

T

TIME, QUARTERLY

FIGURE 8 - INSTRUMENTATION DATA.

FAP CWP B-7 P-11 P-12 P-13 B-0901 B-0902 B-0903 B-0904 BAP

2016 annual dam and dike inspection report...annual inspection. the interior geometry changed with...

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