H.08.03 ForbesField_Airside_Final Report_10082018 ...pdf

REPAIR AIRCRAFT PARKING RAMP

FORBES FIELD, TOPEKA, KANSAS

B-1 SUBMITTAL

Airfield Pavement Condition

Evaluation Report

190th AIR REFUELING WING

KANSAS AIR NATIONAL GUARD

FORBES FIELD, TOPEKA, KANSAS

December 2018

Distribution to U.S. agencies only; administrative or operational use. Distribution limitation applied as of report date.

Other requests for this document must be referred to the

National Guard Bureau, USPFO for Kansas, 2737 South Kansas Ave, Topeka KS 66611.

Airfield Pavement Condition Evaluation Survey Report

Forbes Field Air National Guard Base, Kansas

Date of Survey: August 2018 Date of Final Report: October 2018

AECOM Project Number: 60580947

Prepared by:

AECOM

250 Apollo Drive Chelmsford, MA 01824

USA

www.aecom.com

Copyright © 2018 by AECOM

All rights reserved. No part of this copyrighted work may be reproduced, distributed, or transmitted in any form or by any means without the prior written permission of AECOM.

Airfield Pavement Evaluation Survey Report Forbes Field ANG

AECOM October 2018 | i

Table of Contents Preface...................................................................................................................................................... viii Executive Summary ............................................................................................................................. ES-1

ES.1 Purpose .............................................................................................................................. ES-1 ES.2 Data Summary ................................................................................................................... ES-1 ES.3 Significant Issues ............................................................................................................... ES-3 ES.4 Estimated Repair Budget .................................................................................................. ES-3

Chapter 1 Overview and Background

1.1 Introduction

1.2 Project Scope

1.3 Base Location and History

1.4 Previous Reports

Chapter 2 PCI Process, Results, and Recommendations

2.1 Introduction

2.2 PCI Background

2.3 PCI Survey Process

2.4 Pavement Inventory

2.5 PAVER Implementation

2.6 Overview of PCI Results

2.7 Detailed PCI Description

2.7.1 Aprons

2.7.2 Shoulder

2.7.3 Taxiways

Chapter 3 Detailed PCC Slab-Based Survey

3.1 Introduction

3.2 Survey Process

3.3 Pavement Inventory

3.4 Overview of Slab Based Survey Results

Chapter 4 Maintenance and Repair Requirements

4.1 Introduction

4.2 Maintenance and Repair Program Requirements

4.3 Localized Maintenance Policies

4.4 Unit Cost

4.5 List of Reconstruction and Resurfacing Work Recommendations

4.6 Reflective Cracking Concern

4.7 Localized Maintenance Recommendations

AECOM October 2018 | ii

Appendices Appendix A Slab Level Inventory and Condition Information

Appendix A-1: Slab Inventory Appendix A-2: Slab Level Distresses Appendix A-3: Slab Level Localized Repair Recommendations

Appendix B Maps Appendix B-1: Section Layout Map Appendix B-2: Surface Type Map Appendix B-3: Sample Unit Layout Map Appendix B-4: Slab Layout Map Appendix B-5: Survey Method Map Appendix B-6: 3-Color Section PCI Map Appendix B-7: Recommended Work Map Appendix B-8: Localized Repair Plan

Appendix C Unit Cost Appendix D References Appendix E Glossary

AECOM October 2018 | iii

List of Figures Figure ES-1: PCI Values and PCI Rating Distribution by Branch ........................................................... ES-1

Figure ES-2: Forbes Field ANG PCI Map (7-Color) ................................................................................ ES-4

Figure 2-1: Pavement Deterioration and Consequence of Delayed Intervention

Figure 2-2: Total Area by Inspection Type

Figure 2-3: Surface Type PCI Trends

Figure 2-4: Corner Break and Joint Spalling in APHANGAR, Section A06C

Figure 2-5: Joint Spalling and Corner Spalling in APHANGAR, Section A14C

Figure 2-6: Large Patching and Shattered Slab in APHANGAR, Section A15C

Figure 2-7: Joint Spalling in APHANGAR, Section A17C

Figure 2-8: Vicinity and Alligator Cracking in APHANGAR, Section A18C

Figure 2-9: Corner Breaks in APHANGAR, Section A23C

Figure 2-10: Vicinity and Block Cracking in APMAIN, Section A10B

Figure 2-11: Vicinity and Joint Reflective Cracking in APMAIN, Section A11B

Figure 2-12: Durability Cracking and Linear Cracking in APMAIN, Section A12B

Figure 2-13: Vicinity and Raveling in APMAIN, Section A13B

Figure 2-14: Joint Spalling and Corner Spalling in APMAIN, Section A18B

Figure 2-15: Shattered Slab and Joint Spalling in APMAIN, Section A20B

Figure 2-16: Vicinity and Joint Seal Damage in APMAIN, Section A21B

Figure 2-17: Vicinity and Block Cracking in APMAIN, Section A22B

Figure 2-18: Shoving in APMAIN, Section A22B

Figure 2-19: Vicinity and Linear Cracking in SHOULDER, Section S01

Figure 2-20: Small Patching and Joint Spall in TW12, Section T12C

AECOM October 2018 | iv

List of Tables Table ES-1: Pavement Condition Summary by Branch .......................................................................... ES-1

Table ES-2: Total Distresses by Branch ................................................................................................. ES-2

Table ES-3: Estimated Total Cost of Repair

Table 2-1: Pavement Condition Index (PCI) Rating Scale

Table 2-2: Distress Types and Distress Codes for AC and PCC Pavements

Table 2-3: Pavement Condition Summary by Surface Type

Table 2-4: Forbes Field Section Information

Table 3-1: Slab-Based Distresses per Section (Count)

Table 4-1: Major M&R and Global Work Types

Table 4-2: Localized Maintenance Policies

Table 4-3: Unit Costs for Work Activities

Table 4-4: Major Work by Section

Table 4-5: Summary of Additional Cost Items to Address Reflective Cracking

Table 4-6: Summary of Required Localized Work

Table 4-6: Localized Work by Section

Table A1-1: Slab Inventory at Forbes Field ANG (Count)

Table A2-1: Slab Level Distresses at Forbes Field ANG (Count)

Table A3-1: Slab Level Localized Work Recommendations

AECOM October 2018 | v

Preface Under the direction of the National Guard Bureau (NGB), AECOM Technical Services, Inc. (AECOM) conducted airfield pavement condition evaluations at Forbes Field Air National Guard Base in August 2018.

Evaluations of these pavements resulted in pavement condition index (PCI) values as well as per slab conditions for aircraft parking ramps.

It is anticipated that engineers, planners, and leaders at Forbes Field ANG will be able to apply information presented in this report for planning, programming, and funding of pavement maintenance, repair, and construction projects based on current pavement condition values.

This report and supporting documentation meets USAF standards regarding pavement condition evaluations. Applicable standards include those outlined in American Society of Testing and Materials (ASTM), Air Force Instruction (AFI), U.S. Army Construction Engineering Research Laboratory (CERL), and Unified Facilities Criteria (UFC) documentation and referenced herein. Funding for this project was provided by NGB.

The pavement evaluation field team included Michael Papakostas of AECOM based in Chelmsford, MA, Abbas Kachwalla of AECOM, based in Chicago, IL and, Sergio Valenzuela of WSP based in Lenexa, KS.

The report was prepared by Michael Papakostas and Abbas Kachwalla. Timothy Miller and Harley Hanson reviewed the report.

The team gratefully acknowledges the support provided by Major Diehl and SMSgt VanDerSluis, the team’s point of contact (POC) at Forbes Field ANG, as well as TSgt Stewart and many other individuals at the Base who provided operational and logistical support.

AECOM October 2018 | ES-1

Executive Summary

ES.1 Purpose The executive summary describes the project’s purpose, summarizes high-level condition data, presents significant issues, and briefly discusses the optimal budget scenario.

The National Guard Bureau (NGB) contracted AECOM Technical Services, Inc. (AECOM) to provide pavement evaluation services for its airside parking ramp area at Forbes Field ANG. AECOM performed pavement condition index (PCI) surveys on all asphalt concrete (AC) and Portland cement concrete (PCC) areas, and slab-based surveys on the PCC areas only.

ES.2 Data Summary PCI survey results indicate that the airside pavement network at Forbes Field is in Fair condition with an area-weighted average PCI value of 62. This value compares well to 2014 data where the network was in Fair Condition. Table ES-1 displays pavement conditions by branch, while Figure ES-1 shows the overall distribution of PCI values by branch. Figure ES-2 shows a seven-color PCI map for Forbes Field ANG airside base.

Table ES-1: Pavement Condition Summary by Branch

Branch Use Category

Total Area

(SF)

No.

Sections

Area- Weighted

Average PCI

PCI

Condition

APHANGAR 211,966 8 55 Poor APMAIN 1,647,316 8 63 Fair

SHOULDER 10,772 1 75 Satisfactory TW12 77,030 1 60 Fair

OVERALL 1,947,083 18 62 Fair

Figure ES-1: PCI Values and PCI Rating Distribution by Branch

Slab-based survey results (on PCC areas only) indicate that the airside PCC pavement network at Forbes Field can benefit significantly from maintenance and repair work. By evaluating every slab, actual distress quantities and repair work were determined. Table ES-2 displays the summary of distress quantities recorded.

AECOM October 2018 | ES-2

Table ES-2: Total Distresses by Branch

Branch Total Slabs

Blowup (61)

Corner Break (62)

LTD Cracks (63)

“D” Cracks (64)

Joint Seal Damage (65)

Small Patches (66)

Large Patches (67)

Popouts (68)

Pumping (69)

Scaling (70)

Faulting (71)

Shattered Slab (72)

Shrinkage Cracks (73)

Joint Spalls (74)

Corner Spalls (75)

ASR

(76)

APHANGAR 1,054 0 66 94 111 143 14 6 7 0 1 3 2 34 357 557 0

APMAIN 5,079 0 1 98 347 682 501 125 13 0 5 0 13 28 1,040 2,039 0

TW12 495 2 1 0 93 56 118 11 1 0 1 1 0 0 122 207 0

Total 6,628 2 68 192 551 881 633 142 21 0 7 4 15 62 1,519 2,803 0

Note: Distress values are in counts.

Legend Airside Section Outline

PCI

86 - 100 (Good) 71 - 85 (Satisfactory) 56 - 70 (Fair) 41 - 55 (Poor) 26 - 40 (Very Poor) 11 - 25 (Serious) 0 - 10 (Failed)

APMAIN::A20B

APHANGAR::A14CAPHANGAR::A14CAPHANGAR::A14C

TW12::T12C

APMAIN::A18B

APMAIN::A21B

APMAIN::A11B

APMAIN::A12BAPMAIN::A12BAPMAIN::A12B

APMAIN::A13B

APHANGAR::A23C

APHANGAR::A17C

APHANGAR::A06C

APHANGAR::A16C

APMAIN::A22B

APHANGAR::A18C

SHOULDER::S01

APMAIN::A10BAPMAIN::A10B

APHANGAR::A24C

APHANGAR::A15CAPHANGAR::A15C

APMAIN::A18B

APMAIN::A18B

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

BranchID::SectionID

Label Nomenclature

0 300150 Feet

Executive Summary Pavement Condition Index

Map (7-Color)

Forbes Field

ANG

Project No.:

Approved by:

8/28/2018MP

8/28/2018AK

Prepared by:

60580947 Contract No.: W912JC-18-R-5705

AECOM October 2018 | ES-4

AECOM October 2018 | 1

Chapter 1 Overview and Background

1.1 Introduction

The NGB is looking to repair the failing and deteriorating aircraft parking ramp pavement surfaces at Forbes Field ANG. To this end, the AECOM team is charged with providing high-quality pavement condition data that will assist the design team and Base personnel in identifying sustainment, maintenance, and repair requirements for landside pavement infrastructure at Forbes Field ANG. Furthermore, this work will assist Base personnel in packaging identified requirements into projects for execution. This report discusses inspection methods, results, and areas of concern as well as estimated cost of repair. Chapter 1 presents an overview of Forbes Field Air National Guard Base; Chapter 2 discusses PCI survey methodology and results; Chapter 3 discusses the slab-based survey methodology and results; and Chapter 4 discusses the maintenance and repair (M&R) program requirements and estimated repair cost. Appendices provide information related to inventory information, maps, and references.

This chapter introduces survey objectives and the scope of work. Background information on Forbes Field is also presented.

1.2 Project Scope

Achievement of the project objectives necessitates robust data collection and analysis processes. In general, the processes utilized at Forbes Field ANG to plan, conduct, and reconcile pavement condition data fall into three phases. These phases include:

• Records review: reconciliation of as-built plans, construction records, common installation picture (CIP, or geodatabase) files, PAVER files, and aerial imagery to determine section limits, sample unit boundaries, construction dates, and other information relevant to survey planning.

• Survey: collection of pavement condition data by trained raters using manual and digital survey tools, and reconciliation of section geometry.

• Reporting: quantification and discussion of survey results and proposed actions.

In the records review phase, the project team collects and analyzes available spatial information provided by the Base. The geodatabase is spatially compared to the area in scope per the contract. Overlaying recent aerial imagery allows for the project team to identify areas needing further clarification or explanation and can be addressed during Base in-brief meetings or field surveys.

In the survey phase, the project team mobilizes to the Base to conduct pavement condition surveys. The inspection is performed following the PCI method per ASTM D5340 standards and an additional modified slab-based method on PCC sections. Access to secure areas is coordinated with the Base point of contact (POC) in advance to minimize downtime to the survey team and Base personnel. Survey data is resolved daily to identify areas requiring further inspection and to plan the next day’s surveys.

In the reporting phase, project team members compile distress and pavement inventory data collected during the survey phase. Boundary adjustments or section changes are reconciled in geographic information systems (GIS) and inventory database prior to determining PCI values and conducting cost estimation.

1.3 Base Location and History

Forbes Field is an Air National Guard installation located in Topeka, Kansas. The airfield is shared with Topeka Regional Airport, a public general aviation airport.

Forbes Field dates back to 1942, when it was known as Topeka Army Airfield before becoming Forbes Air Force Base. From then until 1973, various United States Air Force Major Commands were located on the base. The Air National Guard came to the base in 1973, which ultimately led to the Air Force leaving the

AECOM October 2018 | 2 installation and the city of Topeka taking over in 1976. Today, the 190th Air Refueling Wing of the Kansas Air National Guard operates out of the installation. The wing flies the KC-135 Stratotanker as part of its aerial refueling mission.

1.4 Previous Reports

In the context of this report, the Airfield PCI Survey report completed in April 2014 represents the latest survey effort and will form the basis of information herein.

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Chapter 2 PCI Process, Results, and Recommendations

2.1 Introduction

This chapter introduces the pavement condition index (PCI) methodology, process, and survey results.

Generation of PCI values within PAVER allows for work planning and maintenance recommendation.

2.2 PCI Background

Originally developed by the United States Army Corps of Engineers (USACE) and standardized by the American Society of Testing and Materials (ASTM), the PCI method relies on visual observation of the pavement surface to identify distresses and quantify their extent and severity. Combining distress types, quantities, and severity levels leads to the development of a PCI value that ranges from 100 to 0. A PCI value of 100 represents a pavement in excellent condition, while a value of 0 represents a pavement in a completely failed condition. The full range of conditions is presented in Table 2-1 which shows both a three-color and seven-color rating system. This color scheme is used consistently throughout this report.

Table 2-1: Pavement Condition Index (PCI) Rating Scale

Simplified PCI Color Legend

Full PCI Color Legend PCI Range Definition

GOOD

GOOD 86 - 100 Pavement has minor or no distresses and should require only routine maintenance.

SATISFACTORY 71 - 85 Pavement has scattered low-severity distresses that should require only routine maintenance.

FAIR FAIR 56 - 70

Pavement has a combination of generally low- and medium-severity distresses. Near-term maintenance and repair needs may range from routine to major.

POOR

POOR 41 - 55

Pavement has low-, medium-, and high-severity distresses that probably cause some operational problems. Near-term M&R needs ranges from routine to major.

VERY POOR 26 - 40

Pavement has predominantly medium- and high-severity distresses that cause considerable maintenance and operational problems. Near-term M&R needs will be major.

SERIOUS 11 - 25 Pavement has mainly high-severity distresses that cause operational restrictions. Immediate repairs are needed.

FAILED 0 - 10

Pavement deterioration has progressed to the point that safe operations are no longer possible. Complete reconstruction is required.

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The purpose of the PCI survey and pavement management in general is to identify and document pavement distresses caused by a variety of factors. This information can be used to:

• Determine a pavement’s operational condition or level of service.

• Predict future pavement conditions based on family deterioration models.

• Develop and prioritize maintenance, repair, and construction projects.

• Justify budget needs.

Pavement distresses tend to fall into one of three categories based on cause. These categories include:

• Load

Asphalt concrete (AC) distresses such as alligator cracking, rutting, and shoving; and PCC distresses such as corner breaks, linear cracking, and shattered slabs.

• Climate and durability

AC distresses such as block cracking, joint reflection cracking, longitudinal and transverse (L&T) cracking, raveling, and weathering; and PCC distresses such as blow-ups, durability cracking, joint seal damage, shrinkage cracks, joint spalling, and corner spalling.

• Other factors

AC distresses such as bleeding, corrugation, depression, jet blast, oil spillage, patching, polished aggregate, slippage cracking, and swelling; and PCC distresses such as faulting, patching, popouts, pumping, scaling, and alkali-silica reaction (ASR).

A distress may have more than one cause. For example, depressions may be caused by inadequate compaction during construction or by subgrade softening due to environmental factors. In addition, a distress may be initiated by one cause but may progress to a distress of higher severity by another cause.

Therefore, engineering judgment is critical in analyzing the actual cause or causes of the distress, and to provide the best type of repair (which can differ from PAVER recommendations).

Distress types differ depending on pavement type. Distresses on one pavement type may resemble those on another pavement type but may be due to different causal factors. For example, AC cracking may be due to load (alligator fatigue cracking) or environmental factors (transverse or block cracking), whereas cracks on PCC that resemble AC cracks may be due to a loss of subgrade support (corner breaks) or the curing process (shrinkage cracking).

Table 2-2 lists distresses for AC and PCC pavements and enumerates them based on current ASTM D5340 standards.

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Table 2-2: Distress Types and Distress Codes for AC and PCC Pavements

AC Distresses

41. Alligator Cracking 46. Jet Blast 51. Polished Aggregate 56. Swell

42. Bleeding 47. Jt. Reflection Cracking 52. Raveling 57. Weathering

43. Block Cracking 48. L & T Cracking 53. Rutting

44. Corrugation 49. Oil Spillage 54. Shoving

45. Depression 50. Patching 55. Slippage Cracking

PCC Distresses

61. Blow Up 66. Patching (Small) 71. Faulting 76. ASR

62. Corner Break 67. Patching (Large) 72. Shattered Slab

63. Linear Cracking 68. Popouts 73. Shrinkage Cracking

64. Durability Cracking 69. Pumping 74. Joint Spalling

65. Joint Seal Damage 70. Scaling 75. Corner Spalling

Pavement conditions worsen over time as traffic, environmental factors, and drainage considerations undermine the integrity of the pavement structure and underlying layers. While several factors influence the pavement deterioration rate, it is generally accepted that pavement deterioration follows the curve shown in Figure 2-1. With the PCI scale superimposed on this time-condition plot, it can be observed that deterioration rates level off initially in the Satisfactory to Fair range before dropping rapidly to the Fair to Poor range.

Figure 2-1: Pavement Deterioration and Consequence of Delayed Intervention

Source: http://paver.colostate.edu

2.3 PCI Survey Process

During the records review phase, a pavement network is divided into a hierarchical order that facilitates inspection. In this case, the network inspected is the Forbes Field ANG airfield network. Once differentiated, a network is divided into branches that are readily-identifiable parts of the pavement system which have distinct functions. For the Forbes Field airside network, branches consist of individual aprons and taxiways and are often referred to as the pavement use category.

After confirming the existence of pavement branches during a records review, sections are developed or maintained within each branch. In accordance with ASTM standards, a section is defined as an area of uniform pavement exhibiting similar design, construction date, use type, pavement type, and traffic

AECOM October 2018 | 6 characteristics. Certain portions, or sample units, of the section are selected for visual inspection. A section is divided into sample units that are approximately 5000 square feet (±2000 SF) for AC pavement, and 20 slabs (±8 slabs) for PCC pavement.

AECOM applied equations developed in ASTM standards to achieve 95% confidence in the PCI results. In general, sections with higher variability among sample unit PCI values have more sample units selected for survey, while sections with lower variability among sample unit PCI values have fewer sample units selected for survey. As a minimum, AECOM surveyed at least three sample units per section, even if 95% confidence could be achieved with two samples. Ultimately, the goal in sample unit selection is to ensure that distresses present within individual sample units reflect the section’s overall condition. Sample units can be added to the survey plan to ensure compliance with inspection protocols or as additional sample units to collect distress information on specific areas that may not be representative of the section as a whole.

Once sample units have been selected for survey, digital and hard copy maps are prepared for the survey team. Upon mobilization to the Base, pavement inspectors conduct pavement surveys during daylight hours and dry conditions to ensure full visibility of pavement distresses. Within the survey team, one person is responsible for completing the distress survey by assessing distress types, quantities, and severity levels.

The second person is responsible for locating and laying out the sample unit and recording data.

2.4 Pavement Inventory

Forbes Field includes 18 PCI survey sections comprising approximately 1.9 million square feet (SF). Of the PCI survey sections, aprons comprise 16 sections (1,859,282 SF), while taxiways and shoulders comprise 1 section each (77,030 SF and 10,772 SF, respectively). Figure 2-2 breaks down the total area of the network.

Figure 2-2: Total Area by Inspection Type

2.5 PAVER Implementation

PAVER is widely recognized as an industry-wide software for computing PCI results and was used to calculate PCI vales for Forbes Field. PAVER allows for storage of pavement inventory and condition data while containing the tools and modules necessary to determine PCI values and complete work plans.

2.6 Overview of PCI Results

A high-level review of PCI values at Forbes Field ANG network indicates that the overall PCI of the airside network is 62 (Fair). Condition maps presented in Appendix B show latest conditions. Appendix B-6 includes

AECOM October 2018 | 7 a three-color PCI map depicting network-level conditions by pavement section. In general, PCI trends are reasonable when comparing 2018 data to 2014 data. The following conditions should be noted:

• Overall, the airside pavement network exhibits a PCI of 62 in 2018 and is in Fair condition.

• APHANGAR exhibits a PCI of 55 and is in Poor condition.

• APMAIN exhibits a PCI of 63 and is in Fair Condition.

• SHOULDER exhibits a PCI of 75 and is in Satisfactory Condition.

• TW12 exhibits a PCI of 60 and is in Fair Condition.

PCI values and trends can also be considered in terms of surface type. Table 2-3 displays pavement conditions by surface type. Figure 2-3 shows area-weighted PCI values for 2018 inspections by surface type.

Table 2-3: Pavement Condition Summary by Surface Type

Surface Type

Inspection Year

Total Area

(SF)

Number of Sections for

PCI

Area- Weighted

Average PCI

PCI

Rating

AC 2018 789,020 6 58 Fair PCC 2018 1,158,063 12 64 Fair

OVERALL 2018 1,947,083 18 62 Fair

The following conditions for various surface types at Forbes Field should be noted:

• AC surfaces exhibit a PCI of 58 and are in Fair condition.

• PCC surfaces exhibit a PCI of 64 and are in Fair condition.

Figure 2-3: Surface Type PCI Trends

Table 2-4 presents the 2018 PCI results for Forbes Field by section. In addition to presenting basic inventory information, Table 2-4 presents branch PCI, section PCI, surface type, and area.

AECOM October 2018 | 8

Table 2-4: Forbes Field Section Information

Branch Section

Branch ID Branch Name PCI Section

ID

Surface Type

Area (SF) PCI PCI Category

APHANGAR HANGAR

APRONS 55

A06C PCC 19,079 34 Very Poor A14C PCC 117,049 67 Fair A15C PCC 18,675 22 Serious A16C PCC 11,250 39 Very Poor A17C PCC 12,766 46 Poor A18C AC 26,318 48 Poor A23C PCC 1,829 36 Very Poor A24C PCC 5,000 73 Satisfactory

APMAIN MAIN

APRONS 63

A10B AC 120,957 57 Fair A11B AC 266,252 69 Fair A12B PCC 157,973 32 Very Poor A13B AC 213,390 41 Poor A18B PCC 679,130 74 Satisfactory A20B PCC 34,748 56 Fair A21B PCC 23,533 93 Good A22B AC 151,331 66 Fair

SHOULDER SHOULDER 75 S01 AC 10,772 75 Satisfactory TW12 TAXIWAY 12 60 T12C PCC 77,030 60 Fair

2.7 Detailed PCI Description

This section contains detailed PCI descriptions for all pavement branches that received a PCI rating.

Section-level PCI values are presented by branch use (i.e., apron, taxiway, shoulder) with prominent distresses that are driving the PCI value, along with a list of all distresses observed in the section.

Significant distresses are reported for sections in Satisfactory or worse condition and are defined as the top three distresses that drive the PCI score and have deducts greater than 10 points. Maintenance and repair recommendations are also included and are outlined again in Chapter 4.

2.7.1 Aprons

HANGAR APRONS

APHANGAR consists of one asphalt-surfaced section and seven concrete-surfaced sections with a total area of 211,966 SF. The area-weighted average PCI of the branch is 55 (Poor).

• PCC Section A06C has an area of 19,079 SF and a PCI rating of 34 (Very Poor). Primary distresses observed in the section include medium joint spalling, medium linear cracking, and medium corner breaks. Reconstruction is recommended at this time.

AECOM October 2018 | 9

Figure 2-4: Corner Break and Joint Spalling in APHANGAR, Section A06C

• PCC Section A14C has an area of 117,049 SF and a PCI rating of 67 (Fair). Primary distresses observed in the section include medium corner spalling and medium joint spalling. Localized maintenance is recommended at this time.

Figure 2-5: Joint Spalling and Corner Spalling in APHANGAR, Section A14C

• PCC Section A15C has an area of 18,675 SF and a PCI rating of 22 (Serious). Primary distresses observed in the section include medium linear cracking, medium joint spalling, and medium durability cracking. Reconstruction is recommended at this time.

Figure 2-6: Large Patching and Shattered Slab in APHANGAR, Section A15C

AECOM October 2018 | 10

• PCC Section A16C has an area of 11,250 SF and a PCI rating of 39 (Very Poor). Primary distresses observed in the section include medium and low linear cracking and low durability cracking.

Reconstruction is recommended at this time.

• PCC Section A17C has an area of 12,766 SF and a PCI rating of 46 (Poor). Primary distresses observed in the section include medium joint spalling, medium corner spalling, and medium durability cracking. Reconstruction is recommended at this time.

Figure 2-7: Joint Spalling in APHANGAR, Section A17C

• AC Section A18C has an area of 26,318 SF and a PCI rating of 48 (Poor). Primary distresses observed in the section include high and medium alligator cracking and medium L&T cracking. This section is used for storage vehicles and not aircrafts. Resurfacing is recommended at this time.

Figure 2-8: Vicinity and Alligator Cracking in APHANGAR, Section A18C

• PCC Section A23C has an area of 1,829 SF and a PCI rating of 36 (Very Poor). Primary distresses observed in the section include low corner breaks, medium joint spalling, and medium corner spalling.

Reconstruction is recommended at this time.

AECOM October 2018 | 11

Figure 2-9: Corner Breaks in APHANGAR, Section A23C

• PCC Section A24C has an area of 5,000 SF and a PCI rating of 73 (Satisfactory). Primary distresses observed in the section include low linear cracking and medium and low joint spalling. Localized maintenance is recommended at this time.

MAIN APRONS

APMAIN consists of four asphalt-surfaced sections and four concrete-surfaced sections with a total area of 1,647,316 SF. The area-weighted average PCI of the branch is 63 (Fair).

• AC Section A10B has an area of 120,957 SF and a PCI rating of 57 (Fair). Primary distresses observed in the section include low and medium block cracking and medium weathering. Resurfacing is recommended at this time.

Figure 2-10: Vicinity and Block Cracking in APMAIN, Section A10B

• AC Section A11B has an area of 266,252 SF and a PCI rating of 69 (Fair). Primary distresses observed in the section include low block cracking, medium joint reflective cracking, and medium L&T cracking.

Resurfacing is recommended at this time.

AECOM October 2018 | 12

Figure 2-11: Vicinity and Joint Reflective Cracking in APMAIN, Section A11B

• PCC Section A12B has an area of 157,973 SF and a PCI rating of 32 (Very Poor). Primary distresses observed in the section include medium linear cracking, medium durability cracking, and medium joint spalling. Reconstruction is recommended at this time.

Figure 2-12: Durability Cracking and Linear Cracking in APMAIN, Section A12B

• AC Section A13B has an area of 213,390 SF and a PCI rating of 41 (Poor). Primary distresses observed in the section include medium block cracking, medium weathering, and high raveling.

Resurfacing is recommended at this time.

Figure 2-13: Vicinity and Raveling in APMAIN, Section A13B

AECOM October 2018 | 13

• PCC Section A18B has an area of 679,130 SF and a PCI rating of 74 (Satisfactory). Primary distresses observed in the section include medium corner spalling and medium joint spalling. Localized

Figure 2-14: Joint Spalling and Corner Spalling in APMAIN, Section A18B

• PCC Section A20B has an area of 34,748 SF and a PCI rating of 56 (Fair). Primary distresses observed in the section include medium joint spalling and medium and low corner spalling. Localized

Figure 2-15: Shattered Slab and Joint Spalling in APMAIN, Section A20B

• PCC Section A21B has an area of 23,533 SF and a PCI rating of 93 (Good). No significant distresses were observed in the section. No work is recommended at this time.

AECOM October 2018 | 14

Figure 2-16: Vicinity and Joint Seal Damage in APMAIN, Section A21B

• AC Section A22B has an area of 151,331 SF and a PCI rating of 66 (Fair). Primary distresses observed in the section include low block cracking, medium weathering, and low joint reflective cracking. At the intersection of the apron and TW-12 high severity shoving is observed as seen in Figure 2-18. This is due to the differential thermal cycles between the AC and PCC surfaces. In addition to resurfacing the section, at the AC and PCC intersection, an intermediate layer is recommended to avoid future shoving.

Figure 2-17: Vicinity and Block Cracking in APMAIN, Section A22B

Figure 2-18: Shoving in APMAIN, Section A22B

AECOM October 2018 | 15

2.7.2 Shoulder

SHOULDER

SHOULDER consists of one asphalt-surfaced section with a total area of 10,772 SF. The area-weighted average PCI of the branch is 75 (Satisfactory).

• AC Section S01 has an area of 10,772 SF and a PCI rating of 75 (Satisfactory). Primary distresses observed in the section include medium weathering and low L&T cracking. No work is recommended at this time.

Figure 2-19: Vicinity and Linear Cracking in SHOULDER, Section S01

2.7.3 Taxiways

TAXIWAY 12

TW12 consists of one concrete-surfaced section with a total area of 77,030 SF. The area-weighted average PCI of the branch is 60 (Fair).

• PCC Section T12C has an area of 77,030 SF and a PCI rating of 60 (Fair). Primary distresses observed in the section include medium durability cracking, medium corner spalling, and medium blow-ups.

Localized maintenance is recommended at this time.

Figure 2-20: Small Patching and Joint Spall in TW12, Section T12C

AECOM October 2018 | 16

Chapter 3 Detailed PCC Slab-Based Survey

3.1 Introduction

This chapter introduces the slab-based survey for PCC pavements at Forbes Field ANG to be used to determine the localized maintenance requirements at specific locations on PCC sections. In this survey method, the distresses evaluated were in accordance with ASTM D5340 standards. The purpose of this survey is to improve the current PCC pavement condition and mitigate the potential for FOD (Foreign Object Debris) which can damage airplane engines.

3.2 Survey Process

As explained in Section 2.3, the pavement network is divided into hierarchical order of network, branches, and sections. For the PCI survey purposes, sections are further divided into sample units. For the slab-based survey, PCC sections are further divided into individual slabs. Each slab has a unique ID for inspection purposes. Similar to the PCI survey, pavement inspectors conduct pavement surveys during daylight hours and dry conditions to ensure full visibility of pavement distresses. Within the survey team, one person is responsible for completing the distress survey by assessing distress types, quantities, and severity levels. The second person is responsible for locating the slab.

This survey method differs from the PCI process where for an individual slab, only one count of the highest severity distress is recorded. However, for the slab-based survey the actual number of distress counts are recorded along with their severity levels. For example, consider a slab having two low severity, one medium severity, and one high severity joint spall. In the PCI survey process, only one high severity joint spall on the slab would have been recorded. However, in slab-based survey approach all severities and counts of a distress are recorded: in this case, two low severity, one medium severity, and one high severity joint spall.

This would result in having actual distress counts that can be used to determine maintenance and repair needs.

3.3 Pavement Inventory

Forbes Field includes a total of 18 sections comprising approximately 1.9 million square feet (SF). For the slab-based survey only PCC sections were surveyed which included aprons comprising of 11 sections (1,081,034 SF) and 6,133 slabs; and taxiways comprising 1 section (77,030 SF) and 495 slabs.

3.4 Overview of Slab Based Survey Results

Table 3.1 shows the summary of the slab-based distresses recorded per section. Detailed per slab distresses along with severity and count can be found in Appendix A-2.

AECOM October 2018 | 17

Table 3-1: Slab-Based Distresses per Section (Count)

Branch Section Blowup (61)

Corner Break (62)

LTD Cracks (63)

“D” Cracks (64)

Joint Seal Damage (65)

Small Patches (66)

Large Patches (67)

Popouts (68)

Pumping (69)

Scaling (70)

Faulting (71)

Shattered Slab (72)

Shrinkage Cracks (73)

Joint Spalls (74)

Corner Spalls (75)

ASR

(76)

APHANGAR A06C 0 37 43 8 7 1 0 0 0 0 0 1 31 76 30 0

APHANGAR A14C 0 4 18 39 108 12 1 7 0 1 3 0 1 208 443 0

APHANGAR A15C 0 5 21 26 7 0 3 0 0 0 0 1 1 21 8 0

APHANGAR A16C 0 0 10 17 9 0 0 0 0 0 0 0 1 1 5 0

APHANGAR A17C 0 14 2 21 4 1 1 0 0 0 0 0 0 45 66 0

APHANGAR A23C 0 6 0 0 8 0 1 0 0 0 0 0 0 6 5 0

APMAIN A12B 0 1 96 147 95 113 32 13 0 1 0 12 28 146 94 0

APMAIN A18B 0 0 2 181 535 386 93 0 0 4 0 0 0 670 1735 0

APMAIN A20B 0 0 0 18 38 2 0 0 0 0 0 1 0 206 206 0

APMAIN A21B 0 0 0 1 14 0 0 0 0 0 0 0 0 18 4 0

TW12 T12C 2 1 0 93 56 118 11 1 0 1 1 0 0 122 207 0

Total: 2 68 192 551 881 633 142 21 0 7 4 15 62 1519 2803 0

AECOM October 2018 | 18

Chapter 4 Maintenance and Repair Requirements

4.1 Introduction

This chapter introduces maintenance and repair (M&R) program policies and requirements. As pavement infrastructure at Forbes Field ANG represents a significant long-term investment, it is imperative that proactive pavement management strategies be applied in managing the network at the expected level of service. Repair strategies and estimated costs of repair have also been discussed in this chapter.

4.2 Maintenance and Repair Program Requirements

A common method to identify sections needing work is to compare the section’s PCI value to an established minimum criterion. The criterion most commonly used is the critical or trigger PCI value. In general, the trigger PCI value divides localized maintenance and major repair (resurfacing and reconstruction). If the PCI value falls below the critical PCI value, localized maintenance may not be cost-effective, and a more expensive and time-consuming construction activity may need to be considered to increase the PCI value and corresponding level of service. Figure 2-1 remains instructive in depicting the costs of deferred maintenance.

For this project the following criteria was adopted to determine repair needs.

Table 4-1: Major M&R and Global Work Types

PCI

Range

Repair Work Descriptions Asphalt Concrete (AC) Portland Cement Concrete (PCC)

0-55 Reconstruction/Resurfacing Reconstruction 56-70 Reconstruction/Resurfacing Localized Maintenance

71-100 Localized Maintenance Localized Maintenance

4.3 Localized Maintenance Policies

In order to determine the localized work requirements, the following policies were applied for PCC distresses. There were no AC sections recommended for localized maintenance. Table 4-2 below shows applied policies. The policies were developed in accordance with UFC 3-270-08. The table also includes the recommended repair strategy for the particular distress and dimensions for the work. The dimensions were developed using typical sizes observed during the field survey.

It was observed that some PCC pavements were exhibiting durability cracking. Durability cracking is caused due freeze thaw cycles. The stopgap measure for durability cracking is remove and replace (patching) of the distressed areas. Other factors to control durability cracking are:

• Keep joint seal in excellent condition to prevent entry of water and development of durability cracking.

• Replace affected areas (patch/slab replacement) with high quality concrete mix.

• Use high quality durable aggregates of suitably small max. size. Avoid using aggregates with low permeability, high porosity, and small pore size.

AECOM October 2018 | 19

Table 4-2: Localized Maintenance Policies

Distress Severity Description Work Type Size

Units L W

61 Low Blow-Up Patching - PCC Full Depth Slab L 2 SF 61 Medium Blow-Up Patching - PCC Full Depth Slab L 1/4 Slab W SF 61 High Blow-Up Slab Replacement - PCC Slab L Slab W SF 62 Low Corner Break Crack Sealing - PCC 5 - FT 62 Medium Corner Break Patching - PCC Full Depth 3.5 3.5 SF 62 High Corner Break Patching - PCC Full Depth 5 5 SF 63 Medium Linear Cracking Crack Sealing - PCC Slab L - FT

63 High Linear Cracking Crack Sealing – PCC (Routing and Sealing) Slab L 0.25 SF

64 Medium Durability Cracking Patching - PCC Partial Depth 2.5 2 SF 64 High Durability Cracking Slab Replacement - PCC Slab L Slab W SF 65 Medium Jt Seal Dmg Joint Seal (Localized) 1*Slab L - FT 65 High Jt Seal Dmg Joint Seal (Localized) 2*Slab L - FT 66 Medium Small Patch Patching - PCC Partial Depth 3 2 SF 66 High Small Patch Patching - PCC Partial Depth 3 2 SF 67 Medium Large Patch Patching - PCC Full Depth 6 3 SF 67 High Large Patch Patching - PCC Full Depth 6 3 SF 69 N Pumping Joint Seal (Localized) Slab L - SF 70 Medium Scaling Patching - PCC Partial Depth 2.5 2 SF 70 High Scaling Slab Replacement - PCC Slab L Slab W SF 71 Medium Faulting Grinding (Localized) Slab L 2 FT 71 High Faulting Grinding (Localized) Slab L 2 FT 72 Low Shat. Slab Slab Replacement - PCC Slab L Slab W SF 72 Medium Shat. Slab Slab Replacement - PCC Slab L Slab W SF 72 High Shat. Slab Slab Replacement - PCC Slab L Slab W SF 74 Low Joint Spall Crack Sealing - PCC 0.5 - FT 74 Medium Joint Spall Patching - PCC Partial Depth 1 0.5 SF 74 High Joint Spall Patching - PCC Partial Depth 2 0.5 SF 75 Low Corner Spall Crack Sealing - PCC 0.5 - FT 75 Medium Corner Spall Patching - PCC Partial Depth 1 1 SF 75 High Corner Spall Patching - PCC Partial Depth 1.5 1.5 SF

76 Medium Alkali-Silica Reaction Patching - PCC Partial Depth 2 2 SF

76 High Alkali-Silica Reaction Slab Replacement - PCC Slab L Slab W SF

AECOM October 2018 | 23

Appendix A Slab Level Inventory and Condition Information Appendix A-1: Slab Inventory

Appendix A-2: Slab Level Distresses

Appendix A-2: Slab Level Localized Repair Recommendations

AECOM October 2018 | 24

Appendix A-1: Slab Inventory Table A1-1 presents the slab inventory information for PCC sections at Forbes Field ANG.

AECOM October 2018 | 25

Table A1-1: Slab Inventory at Forbes Field ANG (Count)

Branch ID Section ID Sample Unit ID Slab ID Slab Length (FT) Slab Width (FT) Slab Area (SF)

APHANGAR A06C 01 1398 12.5 12.5 156.25

APHANGAR A06C 01 1427 12.5 12.5 156.25

APHANGAR A06C 01 1428 12.5 12.5 156.25

APHANGAR A06C 01 1453 12.5 12.5 156.25

APHANGAR A06C 01 1454 12.5 12.5 156.25

APHANGAR A06C 01 1455 12.5 12.5 156.25

APHANGAR A06C 01 1466 12.5 12.5 156.25

APHANGAR A06C 01 1478 12.5 12.5 156.25

APHANGAR A06C 01 1479 12.5 12.5 156.25

APHANGAR A06C 01 1480 12.5 12.5 156.25

APHANGAR A06C 01 1491 12.5 12.5 156.25

APHANGAR A06C 01 1500 12.5 12.5 156.25

APHANGAR A06C 01 1501 12.5 12.5 156.25

APHANGAR A06C 01 1502 12.5 12.5 156.25

APHANGAR A06C 01 1513 12.5 12.5 156.25

APHANGAR A06C 01 1522 12.5 12.5 156.25

APHANGAR A06C 01 1523 12.5 12.5 156.25

APHANGAR A06C 01 1534 12.5 12.5 156.25

APHANGAR A06C 01 1543 12.5 12.5 156.25

APHANGAR A06C 01 1553 12.5 12.5 156.25

APHANGAR A06C 02 1241 12.5 12.5 156.25

APHANGAR A06C 02 1275 12.5 12.5 156.25

APHANGAR A06C 02 1276 12.5 12.5 156.25

APHANGAR A06C 02 1309 12.5 12.5 156.25

APHANGAR A06C 02 1310 12.5 12.5 156.25

APHANGAR A06C 02 1311 12.5 12.5 156.25

APHANGAR A06C 02 1321 12.5 12.5 156.25

APHANGAR A06C 02 1339 12.5 12.5 156.25

APHANGAR A06C 02 1340 12.5 12.5 156.25

APHANGAR A06C 02 1341 12.5 12.5 156.25

APHANGAR A06C 02 1352 12.5 12.5 156.25

APHANGAR A06C 02 1371 12.5 12.5 156.25

APHANGAR A06C 02 1372 12.5 12.5 156.25

APHANGAR A06C 02 1373 12.5 12.5 156.25

APHANGAR A06C 02 1383 12.5 12.5 156.25

APHANGAR A06C 02 1399 12.5 12.5 156.25

APHANGAR A06C 02 1400 12.5 12.5 156.25

APHANGAR A06C 02 1412 12.5 12.5 156.25

APHANGAR A06C 02 1429 12.5 12.5 156.25

APHANGAR A06C 02 1443 12.5 12.5 156.25

APHANGAR A06C 03 1022 12.5 12.5 156.25

APHANGAR A06C 03 1055 12.5 12.5 156.25

APHANGAR A06C 03 1056 12.5 12.5 156.25

APHANGAR A06C 03 1094 12.5 12.5 156.25

APHANGAR A06C 03 1095 12.5 12.5 156.25

APHANGAR A06C 03 1096 12.5 12.5 156.25

APHANGAR A06C 03 1112 12.5 12.5 156.25

APHANGAR A06C 03 1130 12.5 12.5 156.25

APHANGAR A06C 03 1131 12.5 12.5 156.25

APHANGAR A06C 03 1132 12.5 12.5 156.25

APHANGAR A06C 03 1148 12.5 12.5 156.25

APHANGAR A06C 03 1168 12.5 12.5 156.25

APHANGAR A06C 03 1169 12.5 12.5 156.25

Slab Inventory

AECOM October 2018 | 26

Slab Inventory

APHANGAR A06C 03 1170 12.5 12.5 156.25

APHANGAR A06C 03 1184 12.5 12.5 156.25

APHANGAR A06C 03 1203 12.5 12.5 156.25

APHANGAR A06C 03 1205 12.5 12.5 156.25

APHANGAR A06C 03 1206 12.5 12.5 156.25

APHANGAR A06C 03 1219 12.5 12.5 156.25

APHANGAR A06C 03 1242 12.5 12.5 156.25

APHANGAR A06C 03 1243 12.5 12.5 156.25

APHANGAR A06C 03 1255 12.5 12.5 156.25

APHANGAR A06C 03 1277 12.5 12.5 156.25

APHANGAR A06C 03 1288 12.5 12.5 156.25

APHANGAR A06C 04 1271 12.5 12.5 156.25

APHANGAR A06C 04 1305 12.5 12.5 156.25

APHANGAR A06C 04 1306 12.5 12.5 156.25

APHANGAR A06C 04 1335 12.5 12.5 156.25

APHANGAR A06C 04 1336 12.5 12.5 156.25

APHANGAR A06C 04 1337 12.5 12.5 156.25

APHANGAR A06C 04 1367 12.5 12.5 156.25

APHANGAR A06C 04 1368 12.5 12.5 156.25

APHANGAR A06C 04 1369 12.5 12.5 156.25

APHANGAR A06C 04 1370 12.5 12.5 156.25

APHANGAR A06C 04 1395 12.5 12.5 156.25

APHANGAR A06C 04 1396 12.5 12.5 156.25

APHANGAR A06C 04 1397 12.5 12.5 156.25

APHANGAR A06C 04 1401 12.5 12.5 156.25

APHANGAR A06C 04 1425 12.5 12.5 156.25

APHANGAR A06C 04 1426 12.5 12.5 156.25

APHANGAR A06C 04 1430 12.5 12.5 156.25

APHANGAR A06C 04 1452 12.5 12.5 156.25

APHANGAR A06C 04 1456 12.5 12.5 156.25

APHANGAR A06C 04 1481 12.5 12.5 156.25

APHANGAR A06C 05 1090 12.5 12.5 156.25

APHANGAR A06C 05 1126 12.5 12.5 156.25

APHANGAR A06C 05 1127 12.5 12.5 156.25

APHANGAR A06C 05 1164 12.5 12.5 156.25

APHANGAR A06C 05 1165 12.5 12.5 156.25

APHANGAR A06C 05 1166 12.5 12.5 156.25

APHANGAR A06C 05 1199 12.5 12.5 156.25

APHANGAR A06C 05 1200 12.5 12.5 156.25

APHANGAR A06C 05 1201 12.5 12.5 156.25

APHANGAR A06C 05 1202 12.5 12.5 156.25

APHANGAR A06C 05 1236 12.5 12.5 156.25

APHANGAR A06C 05 1237 12.5 12.5 156.25

APHANGAR A06C 05 1238 12.5 12.5 156.25

APHANGAR A06C 05 1240 12.5 12.5 156.25

APHANGAR A06C 05 1272 12.5 12.5 156.25

APHANGAR A06C 05 1273 12.5 12.5 156.25

APHANGAR A06C 05 1274 12.5 12.5 156.25

APHANGAR A06C 05 1307 12.5 12.5 156.25

APHANGAR A06C 05 1308 12.5 12.5 156.25

APHANGAR A06C 05 1338 12.5 12.5 156.25

APHANGAR A06C 06 0892 12.5 12.5 156.25

APHANGAR A06C 06 0920 12.5 12.5 156.25

AECOM October 2018 | 27

APHANGAR A06C 06 0921 12.5 12.5 156.25

APHANGAR A06C 06 0952 12.5 12.5 156.25

APHANGAR A06C 06 0953 12.5 12.5 156.25

APHANGAR A06C 06 0954 12.5 12.5 156.25

APHANGAR A06C 06 0983 12.5 12.5 156.25

APHANGAR A06C 06 0984 12.5 12.5 156.25

APHANGAR A06C 06 0985 12.5 12.5 156.25

APHANGAR A06C 06 0986 12.5 12.5 156.25

APHANGAR A06C 06 1018 12.5 12.5 156.25

APHANGAR A06C 06 1019 12.5 12.5 156.25

APHANGAR A06C 06 1020 12.5 12.5 156.25

APHANGAR A06C 06 1021 12.5 12.5 156.25

APHANGAR A06C 06 1051 12.5 12.5 156.25

APHANGAR A06C 06 1052 12.5 12.5 156.25

APHANGAR A06C 06 1053 12.5 12.5 156.25

APHANGAR A06C 06 1054 12.5 12.5 156.25

APHANGAR A06C 06 1091 12.5 12.5 156.25

APHANGAR A06C 06 1092 12.5 12.5 156.25

APHANGAR A06C 06 1093 12.5 12.5 156.25

APHANGAR A06C 06 1128 12.5 12.5 156.25

APHANGAR A06C 06 1129 12.5 12.5 156.25

APHANGAR A06C 06 1167 12.5 12.5 156.25

APHANGAR A14C 01 1469 12.5 12.5 156.25

APHANGAR A14C 01 1494 12.5 12.5 156.25

APHANGAR A14C 01 1495 12.5 12.5 156.25

APHANGAR A14C 01 1516 12.5 12.5 156.25

APHANGAR A14C 01 1517 12.5 12.5 156.25

APHANGAR A14C 01 1518 12.5 12.5 156.25

APHANGAR A14C 01 1537 12.5 12.5 156.25

APHANGAR A14C 01 1538 12.5 12.5 156.25

APHANGAR A14C 01 1539 12.5 12.5 156.25

APHANGAR A14C 01 1542 12.5 12.5 156.25

APHANGAR A14C 01 1554 12.5 12.5 156.25

APHANGAR A14C 01 1555 12.5 12.5 156.25

APHANGAR A14C 01 1557 12.5 12.5 156.25

APHANGAR A14C 01 1559 12.5 12.5 156.25

APHANGAR A14C 01 1569 12.5 12.5 156.25

APHANGAR A14C 01 1570 12.5 12.5 156.25

APHANGAR A14C 01 1571 12.5 12.5 156.25

APHANGAR A14C 01 1573 12.5 12.5 156.25

APHANGAR A14C 01 1574 12.5 12.5 156.25

APHANGAR A14C 01 1583 12.5 12.5 156.25

APHANGAR A14C 01 1584 12.5 12.5 156.25

APHANGAR A14C 01 1586 12.5 12.5 156.25

APHANGAR A14C 01 1594 12.5 12.5 156.25

APHANGAR A14C 01 1596 12.5 12.5 156.25

APHANGAR A14C 01 1604 12.5 12.5 156.25

APHANGAR A14C 02 1097 12.5 12.5 156.25

APHANGAR A14C 02 1134 12.5 12.5 156.25

APHANGAR A14C 02 1135 12.5 12.5 156.25

APHANGAR A14C 02 1172 12.5 12.5 156.25

APHANGAR A14C 02 1173 12.5 12.5 156.25

APHANGAR A14C 02 1174 12.5 12.5 156.25

AECOM October 2018 | 28

APHANGAR A14C 02 1207 12.5 12.5 156.25

APHANGAR A14C 02 1208 12.5 12.5 156.25

APHANGAR A14C 02 1209 12.5 12.5 156.25

APHANGAR A14C 02 1212 12.5 12.5 156.25

APHANGAR A14C 02 1244 12.5 12.5 156.25

APHANGAR A14C 02 1245 12.5 12.5 156.25

APHANGAR A14C 02 1246 12.5 12.5 156.25

APHANGAR A14C 02 1248 12.5 12.5 156.25

APHANGAR A14C 02 1278 12.5 12.5 156.25

APHANGAR A14C 02 1279 12.5 12.5 156.25

APHANGAR A14C 02 1280 12.5 12.5 156.25

APHANGAR A14C 02 1281 12.5 12.5 156.25

APHANGAR A14C 02 1312 12.5 12.5 156.25

APHANGAR A14C 02 1313 12.5 12.5 156.25

APHANGAR A14C 02 1314 12.5 12.5 156.25

APHANGAR A14C 02 1342 12.5 12.5 156.25

APHANGAR A14C 02 1343 12.5 12.5 156.25

APHANGAR A14C 02 1374 12.5 12.5 156.25

APHANGAR A14C 03 0955 12.5 12.5 156.25

APHANGAR A14C 03 0987 12.5 12.5 156.25

APHANGAR A14C 03 0988 12.5 12.5 156.25

APHANGAR A14C 03 1023 12.5 12.5 156.25

APHANGAR A14C 03 1024 12.5 12.5 156.25

APHANGAR A14C 03 1025 12.5 12.5 156.25

APHANGAR A14C 03 1057 12.5 12.5 156.25

APHANGAR A14C 03 1058 12.5 12.5 156.25

APHANGAR A14C 03 1059 12.5 12.5 156.25

APHANGAR A14C 03 1060 12.5 12.5 156.25

APHANGAR A14C 03 1098 12.5 12.5 156.25

APHANGAR A14C 03 1099 12.5 12.5 156.25

APHANGAR A14C 03 1100 12.5 12.5 156.25

APHANGAR A14C 03 1101 12.5 12.5 156.25

APHANGAR A14C 03 1136 12.5 12.5 156.25

APHANGAR A14C 03 1137 12.5 12.5 156.25

APHANGAR A14C 03 1138 12.5 12.5 156.25

APHANGAR A14C 03 1139 12.5 12.5 156.25

APHANGAR A14C 03 1175 12.5 12.5 156.25

APHANGAR A14C 03 1176 12.5 12.5 156.25

APHANGAR A14C 03 1177 12.5 12.5 156.25

APHANGAR A14C 03 1210 12.5 12.5 156.25

APHANGAR A14C 03 1211 12.5 12.5 156.25

APHANGAR A14C 03 1247 12.5 12.5 156.25

APHANGAR A14C 04 0835 12.5 12.5 156.25

APHANGAR A14C 04 0862 12.5 12.5 156.25

APHANGAR A14C 04 0863 12.5 12.5 156.25

APHANGAR A14C 04 0893 12.5 12.5 156.25

APHANGAR A14C 04 0894 12.5 12.5 156.25

APHANGAR A14C 04 0895 12.5 12.5 156.25

APHANGAR A14C 04 0922 12.5 12.5 156.25

APHANGAR A14C 04 0923 12.5 12.5 156.25

APHANGAR A14C 04 0924 12.5 12.5 156.25

APHANGAR A14C 04 0925 12.5 12.5 156.25

APHANGAR A14C 04 0956 12.5 12.5 156.25

AECOM October 2018 | 29

APHANGAR A14C 04 0957 12.5 12.5 156.25

APHANGAR A14C 04 0958 12.5 12.5 156.25

APHANGAR A14C 04 0959 12.5 12.5 156.25

APHANGAR A14C 04…