i

Phase II Bond Release Application

J19 and N11 Coal Resource Areas, Kayenta Mine

TABLE OF CONTENTS

Section 2. Phase II Bond Release Supporting Information - Soil and Suitable Material Data

Page

Introduction 2.1

Soil and Suitable Material Thickness – J19 2.1

List of Tables

 2.1 Soil and Suitable Material Thickness Verification Site Sampled by

 PWCC at J19 During 2022 2.2

List of Attachments

 2.1 Certification of Phase II Reclamation Activities

List of Maps

 2.1 Bond Release Phase II Topsoil – J19 Thickness Verification
2.1

SECTION 2. Phase II Bond Release Supporting Information

Soil and Suitable Material Data

Introduction

This Phase II bond release application for the J19 and N11 Coal Resource Areas (CRAs) is 

requesting release for topsoil replacement in one 3.0-acre parcel within the J19 CRA since it was 

not included with the Phase I bond release application that was submitted to the Office of Surface 

Mining Reclamation and Enforcement (OSMRE) in June 2020. Information is provided on topsoil and 

suitable material thickness sampling to document an adequate thickness of topsoil and mitigation 

material has been replaced in this part of the J19 CRA.

Soil and Suitable Material Thickness – J19

Topsoil and suitable material replacement on permanent program lands within the 3.0-acre parcel 

within the J19 CRA occurred during 2018. Topsoil and suitable material replacement status for the 

release area shown on Map 2.1 was previously reported to the regulatory authority on the Topsoil 

Down Map 2 (as of December 31, 2018) shown on the Southeast Sheet contained in the 2018

Reclamation Status and Monitoring Report, Black Mesa and Kayenta Mines (submitted June 2019). 

Soil was redistributed on final graded slopes from stockpiles or replaced directly from soil 

removal areas prior to ripping and contour discing. Pursuant to Chapter 22 of Permit AZ-0001F, 

the thickness of soil replaced shall exceed the minimum average of 1 foot.

The soil depth survey of the 3.0-acre parcel within the J19 permanent program reclaimed area was

completed during August 2022 as shown on Map 2.1. Personnel from Peabody Western Coal Company 

(PWCC) observed one site in the J19 permanent program reclaimed area in order to verify suitable 

material and soil replacement thickness. A stratified grid sampling scheme using a random number 

generator program was used for the 2022 PWCC survey to locate 1 site prior to going into the 

field. A sampling density of about 1 site per 25 acres is typically used being like the density

used and approved previously at Kayenta Mine for the N1/N2, N7/N8, N11, N14, J16, J19, and J21 

soil and suitable material thickness evaluations. A Tremble GeoXT survey grade GPS unit was used 

to navigate to the site. One site was placed in the J19 area and observed by PWCC during 2022 to 

verify soil and suitable material thickness requirements. A 3 1⁄2-inch bucket auger was used to

verify the soil thickness by excavating to the contact with spoil. The results of the soil and 

suitable material thickness verification survey is shown in Table 2.1 and Map 2.1 shows the

sampled site with the corresponding thickness value.
2.2

One (1) sample was collected over the 3.0-acre parcel of disturbed land within the release area. 

Soil and suitable material thickness at the one random profile placed in the J19 release area was 

37 inches (Table 2.1).

The mean soil and suitable material thickness of 37 inches exceeds the minimum 1-foot average 

topsoil thickness requirement presented in the approved reclamation plan in Chapter 22 of Permit 

AZ-0001F. This mean thickness of 3.1 feet also exceeds the topsoil and mitigation material 

thickness of 1.0 feet as required by the spoil suitability mitigation requirements (spoil sample 

site J19-3060) discussed in the Phase I bond release application submitted to OSMRE in June 2020. 

In conclusion, PWCC has satisfied soil and suitable material thickness replacement requirements in 

conformance with the applicable regulatory requirements and as stipulated by the approved 

reclamation plan for the J19 Phase II release area shown on Map 2.1.

Table 2.1. Soil and Suitable Material Thickness Verification Site Sampled by PWCC at J19

During 2022 (See Map 2.1 for Site Location).

Site ID Soil Thickness

(Inches)

Easting

 (Feet) (1)

Northing

 (Feet) (1)

48 37 58909 -41245

Mean 37

(1) PWCC coordinate system.

RRaammpp 5566

RRaammpp DDee aaddhhee aadd RRooaadd

RRaammpp 4444

Equipment and

Materials

Yard (1260)

Equipment and

Materials

Storage Facility

A p p r o v e d B o n d

R e l e a s e P h a s e I

A p p r o v e d B o n d

R e l e a s e P h a s e I

A p p r o v e d B o n d

R e l e a s e P h a s e I

7000

69 50

6900

6800

7100

7050

6900

6850

6800

7050

7000

6850

6800

6850

6750

6 850

6800

6750

7050

7000

7000

6950

6950

6900

6900

68 50

6900

6850

6850

6800

6850

6800

6850

6800

6800

6750

680

5

6850

7000

7000

7000

7000

7000

7000

6950

6950

7000

6950

69 50

6950

6950

6950

6950

6950

6900

6900

6900

6900

6900

6900

6900

6900

6900

6900

68 5

0

6850

6850

685 0

6850

6850

6850

68 50

6850

685 0

6850

6850

6850

6800

6800

680 0

7000

6950

6800

680

0

A p p r o v e d

B o n d R e l e a s e

P h a s e I I I

A p p r o v e d

B o n d R e l e a s e

P h a s e I I I

A p p r o v e d

B o n d R e l e a s e

P h a s e I I I

A p p r o v e d

B o n d R e l e a s e

P h a s e I I

33..00 aacc

TSV-48

58000

58000

60000

60000

62000

62000

-42000-42000

-40000-40000

-38000-38000

B l a c k M e s a

August 11, 2022

Revision

10 foot contour interval

Index contours at 50 feet

Produced by

Gary Altsisi

Professional

Engineer

J-21

J-19

Kayenta Complex

PO Box 650

Kayenta, Arizona USA 86033

1 inch = 200 feet

Map 2.1

J-19

File: F:\GIS\Projects\BondRelease\J19N11_PhaseII\Maps\Map 2.1 Soil Thickness Verification.mxd

Bond Release Phase II

Topsoil Thickness

Verification

Proposed BR Phase II

Approved TOJ Boundary

Approved Bond Release Phase I

Approved Bond Release Phase II

Approved Bond Release Phase III

Pre-law

Major Drainages

Permanent Impoundment

Existing Pond

Facility Outline

Random Topsoil Thickness

Verification Points

Topsoil Area Not Included in

Phase I Release

Ancillary Mine Road

Primary Mine Road

Mine Ramp

Secondary Mine Road

Non-PWCC 2-Lane Unpaved

Road

Non-PWCC Single Track

Road

50 ft Contour

10 ft Contour

Partition Line

Lease Line

Black Mesa Mine

Kayenta Mine

Cattle Guard

Gate

Fence