EXISTING PAVEMENT EVALUATION WILLMER ENGINEERING INC

EXISTING PAVEMENT EVALUATION

Howell Ferry Road

Duluth, Gwinnett County, Georgia

WILLMER ENGINEERING INC.

Willmer Project No. 71.4014

Prepared For

Clark Patterson Lee

Suwanee, Georgia

Prepared By


3772 Pleasantdale Road

Suite 165

Atlanta, Georgia 30340-4270

770.939.0089

Geotechnical Engineering

Environmental Engineering Construction Services

3772 Pleasantdale Road P: 770.939.0089 www.willmerengineering.com Suite 165 F: 770.939.4299 Atlanta, GA 30340-4270

February 25, 2015

VIA EMAIL/U.S. MAIL

Adolfo Guzman, P.E.

Principal

Clark Patterson Lee

350 Town Center Avenue

Suite 201

Suwanee, Georgia 30024

SUBJECT: Existing Pavement Evaluation

Howell Ferry Road



Dear Mr. Guzman:

Willmer Engineering Inc. (Willmer) is pleased to provide this Existing Pavement Evaluation report for

Howell Ferry Road in Duluth, Gwinnett County, Georgia. The work was performed based on information

provided to us by Clark Patterson Lee (CPL) via email correspondence, and in general accordance with

our subcontract with CPL dated December 19, 2014 and the Georgia Department of Transportation

(GDOT) guidance documents for existing pavement evaluation.

The attached summary presents the existing pavement conditions along the project alignment and our

recommendations for pavement design. The pavement design is based on traffic data provided to us by

CPL. The GDOT Pavement Design Tool Version 2.0 computer program was used for the pavement design.

We appreciate the opportunity to be of service to you on this project and look forward to a continuing

relationship. Please contact us if you have any questions concerning this report or require further

assistance.

Sincerely,


Joseph M. Sura, EIT

Daniel C. Pitts, PE

Project Engineer Geotechnical Project Engineer

James L. Willmer, PE

Executive Vice President/Principal Consultant

JMS/DCP/JLW P:\4014 Howell Ferry Road Existing Pavement Analysis\Reports\Report Revised DCP 2-11-15\Pavement Evaluation Report Revised.docx

Existing Pavement Evaluation

Howell Ferry Road



Page 1

Attachments:

Tables

Table 1 Summary of Pavement Conditions

Table 2 Summary of Pavement Core and Crack Depth Information

Figures

Figure 1 Project Location Map

Figure 2 Core Location Plan

Appendices

Appendix I Site Photographs

Appendix II Pavement Core Photographs

Appendix III Asphalt Pavement Design Calculations


Howell Ferry Road



Page 2

1. Location /

Description

This project consists of improvements to one roadway segment as part of a

potential street resurfacing of Howell Ferry Road in the City of Duluth in Gwinnett

County, Georgia. The potential street resurfacing options include mill and

inlay/overlay and/or full-depth reconstruction. The resurfacing options are

discussed and analyzed in further detail later in this report.

This existing pavement evaluation involves the portion of Howell Ferry Road

beginning at the intersection with Peachtree Industrial Boulevard (SR 141) and

ending at the intersection with North Berkeley Lake Road. The length of the

project is approximately one mile. GDOT station numbers for Howell Ferry Road

were not available, therefore, locations along Howell Ferry Road are referenced

as the approximate distance from the intersection with Peachtree Industrial

Boulevard. A project location map is presented in Figure 1.

For the purpose of this evaluation, the approximate one mile alignment of Howell

road was evaluated as a single segment. The roadway and pavement core sample

locations are presented in Figure 2.

The existing Howell Ferry Road is a two-lane road with curb and gutter. At the

intersection with Peachtree Industrial Boulevard, the existing Howell Ferry Road

additionally has a dedicated left turn lane and a dedicated right turn lane onto

Peachtree Industrial Boulevard from the eastbound lane of Howell Ferry Road.

2. Historical

Data

A historical data search was performed during this study. The GDOT TransPI

website was searched for available existing pavement data for this project. No

pavement as-built or maintenance data was found in this search.

Based on the site visit, there are three short segments (less than 250 feet) of

Howell Ferry Road which have been recently resurfaced. Historical data for this

resurfacing was not available. Based on aerial photographs from April 2014, it is

believed that these areas were resurfaced more recently than April 2014.

• Between Wood Acres Road and Whitney Park Drive (≈4,150 to 4,250 feet

from Peachtree Industrial Blvd.): Westbound lane resurfaced.

• Intersection with Wood Acres Road (≈4,500 to 4,700 feet from Peachtree

Industrial Blvd.): Westbound and eastbound lanes resurfaced.

• Intersection with North Berkeley Lake Road (Station ≈5,000 to 5,250 feet from

Peachtree Industrial Blvd.): Westbound and eastbound lanes resurfaced.


Howell Ferry Road



Page 3

3. Traffic Data

Design traffic data for Howell Ferry Road was provided to us by CPL. The following

traffic data was used for pavement design:

Howell Ferry Road

Design Period 2015 to 2035

One-Way AADT in 2015 2,230 vpd

One-Way AADT in 2035 2,453 vpd

Lane Distribution Factor 1.0

24-hour Truck Percentage 1% (0.9% S.U. and 0.1% M.U.)

4. Field

Photographs

Photographs were taken at the time of our fieldwork to record the existing

pavement conditions. These photographs are included in Appendix I.

5. Drainage

Survey

Based on our field reconnaissance, the roadway drainage was in good condition.

No standing water or other drainage problems were observed during this survey.

6. Non-

destructive

Field Testing

No non-destructive tests were performed.

7. Rutting No rutting was observed.

8. Load

Cracking

Load cracking with varying levels of severity was observed along the alignment. In

the 100-foot rating segment, Level 3 load cracking was observed. The load

cracking percentage for the rating segment is presented in Table 1.

9. Block/

Transverse

Cracking

Level 1 transverse cracking with varying levels of severity was observed along the

alignment. In the 100 foot level 1 transverse cracking was observed. The location

and block/transverse cracking percentage is presented in Table 1.

10. Reflection

Cracking

No reflection cracking was observed.

11. Raveling Level 1 raveling was observed along the length of Howell Ferry Road. The level

and percentage of raveling is presented in Table 1.

12. Edge Distress No edge distress was observed.

13. Bleeding or

Flushing

No bleeding or flushing was observed.

14. Corrugation

or Pushing

No corrugation or pushing was observed.


Howell Ferry Road



Page 4

15. Loss of

Section

No loss of section was observed.

16. Patches,

Potholes,

and Local

Base Failures

A total of 7 patches/potholes were observed along Howell Ferry Road, as

presented in Table 1. No local base failures were observed.

17. Cores The existing pavement was cored at 6 locations within the project limits. The type

and thickness of existing pavement and base materials at each location are

summarized in Table 2. Core sample photographs are included in Appendix II.

18. Pavement

Condition

Summary

The pavement surface condition rating for this project was performed in general

accordance with GDOT Pavement Condition Evaluation System (PACES). The

PACES-based rating for Howell Ferry Road is 47.

19. Asphalt

Pavement

Design

Based on the surface condition rating, the existing pavement on Howell Ferry

Road is generally in poor condition and cannot be used in mill and inlay or direct

overlay designs. A description and table of the pavement design recommendation

for Howell Ferry Road is provided below. The GDOT Pavement Design Tool

Version 2.0 computer program was used in the pavement design calculations. The

output from the computer program is included in Appendix III.

Full Depth Reclamation

Full-Depth Reclamation (FDR) is recommended to remediate the pavement. To

provide an adequate pavement section, the existing asphalt pavement (3½ inches

thick) should be removed. The top 8 inches of the newly exposed surface (4

inches GAB and 4 inches of subgrade soil) should be blended and mixed with

cement and compacted in place to form a stabilized base. The stabilized base

should have a minimum 7-day compressive strength of 600 psi. The cement

stabilized base mix design should be the responsibility of the FDR contractor. A

3.25-inch thick layer of asphalt pavement should be constructed atop the newly

stabilized base. The new pavement design will retain the existing vertical profile.

Full-Depth Reclamation: Howell Ferry Road

Pay Item Course Material Thickness

(inches)

402-3103 Asphalt Surface 9.5 mm Type II

Superpave 1 ¼

402-3190 Asphalt

Intermediate

19 mm

Superpave 2

-- Base FDR - Stabilized

Base 8


Howell Ferry Road



Page 5

20. Life Cycle

Cost Analysis

No life Cycle Cost Analysis was performed.

Report By: Joseph Sura, EIT / Daniel Pitts, PE

Reviewed By: James L. Willmer, PE

TABLES

Table 1

Summary of Pavement Conditions

Howell Ferry Road



Rating Segment Sample Section

Load Cracking (%) Block/Transverse

Cracking (%) Reflection

Cracking

(%) Level 1 Level 2 Level 3 Level 4 Level 1 Level 2 Level 3

Howell Ferry Road

610 to 710 Feet from

Peachtree Industrial

Boulevard

0 0 15 0 20 0 0 0

Rating Segment

Raveling (%) Edge

Distress

Bleeding &

Flushing

Corrugation

& Pushing

Loss of

Section

Patches &

Potholes Level 1 Level 2 Level 3

Howell Ferry Road 100 0 0 None None None None 7

Table 2

Summary of Pavement Core and Crack Depth Information

Howell Ferry Road



Page 1 of 1

Abbreviations:

GAB = Graded Aggregate Base

WB = Westbound

EB = Eastbound

Core

No.

Location Asphalt

Pavement

Thickness

(in)

Base

(GAB)

Thickness

(in)

Rut Depth

(in)

Crack

Depth (in) Comments Distance from

Peachtree

Industrial Blvd.

(ft)

Traffic

Direction

B-1 620 WB 3 ½ 4 ½ -- 3 ½ Subgrade appears to be reddish brown sandy CLAY.

B-2 1,490 WB 3 ½ 4 -- 3 ½ Subgrade appears to be reddish brown sandy CLAY.

B-3 2,310 EB 3 ¾ 4 -- 3 ½ Subgrade appears to be reddish brown sandy CLAY.

B-4 3,350 EB 3 ½ 4 -- 3 ½ Subgrade appears to be reddish brown sandy CLAY.

B-5 4,160 WB 3 ½ 3 -- -- Pavement appears to have been resurfaced recently.

Subgrade appears to be reddish brown sandy CLAY.

B-6 4,120 EB 4 6 -- 3 ½ Subgrade appears to be reddish brown sandy CLAY.

FIGURES

GEOTECHNICAL ENGINEERING

CONSTRUCTION SERVICES

ENVIRONMENTAL SERVICES AND ENGINEERING

3772 PLEASANTDALE ROAD - SUITE 165

ATLANTA, GA 30340-4270

P:\4014 H

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REVIEWED BY: TS

DRAWN BY: JB

SCALE: 1" = 1000'

FIGURE 1

PROJECT LOCATION MAP

EXISTING PAVEMENT ANALYSIS

HOWELL FERRY ROAD

GWINNETT, GEORGIA

WILLMER PROJECT No. 71.4014

DATE: 1/16/2015

0+00

10+00

20+0

0

30+0

0

40+0

0

52+5

0

50+0

0

FIGURE 2CORE LOCATION PLANEXISTING PAVEMENT EVALUATIONHOWELL FERRY ROADDULUTH, GWINNETT COUNTY, GEORGIAWILLMER PROJECT No. 71.4014

GEOTECHNICAL ENGINEERING ¤ CONSTRUCTION SERVICESENVIRONMENTAL SERVICES AND ENGINEERING

3772 PLEASANTDALE ROAD - SUITE 165ATLANTA, GA 30340-4270

LEGEND:

APPROXIMATE CORING LOCATIONB - 1

P:\4

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REVIEWED BY: SB

SCALE: AS SHOWN

DRAWN BY: JSDATE: 2/2/2015

B - 2B - 3

B - 4

B - 5

NOTES

1. BACKGROUND MAP SOURCE: GOOGLE EARTH, APRIL 20142. GDOT STATIONING FOR HOWELL FERRY ROAD WAS NOT AVAILABLE. FOR PURPOSES OF THIS PROJECT, APPROXIMATE STATIONINGALONG HOWELL FERRY ROAD HAS BEEN ESTABLISHED STARTING AT THE INTERSECTION WITH PEACHTREE INDUSTRIAL BOULEVARD.

B - 6

B - 1

APPENDIX I

Site Photographs: Howell Ferry Road Existing Pavement Evaluation



Sheet 1 of 1

Sample Rating Segment; Core Location B-1; Looking West

Sample Rating Segment; Core Location B-1; Looking East

B-1

B-1

APPENDIX II

Pavement Core Photographs: Howell Ferry Road Existing Pavement Evaluation



Sheet 1 of 3

Core No. Location Distance from Peachtree

Industrial Blvd. (ft) Traffic Direction

C-1 Howell Ferry Road

620 Westbound

C-2 1,490 Westbound

B-1 B-2

3½” 3½”




Sheet 2 of 3



C-3 Howell Ferry Road

2,310 Eastbound

C-4 3,350 Eastbound

B-3 B-4

3½”

3¾”




Sheet 3 of 3



B-5 Howell Ferry Road

4,160 Westbound

B-6 4,120 Eastbound

B-5

3½”

B-6

4”

APPENDIX III

Prepared By

Recommended By

Approved By

State Pavement Engineer Date

Filename: P:\4014 Howell Ferry Road Existing Pavement Analysis\Working Data\GDOT Pavement Design - Howell Ferry.xlsm

GDOT Pavement Design Tool - Version 2.0

Design

RemarksFull Depth Reclamation (FDR) for Howell Ferry Road

2/11/2015 5:36 PM

Joseph Sura, Willmer Engineering Inc. Date

Consultant Design Phase Leader Date

Course 3 Full Depth Reclamation (FDR) 8.00 0.2000 1.60

Required SN 3.18 Proposed pavement is 4.63% Underdesigned Proposed SN 3.03

Course 1 9.5 mm Type II Superpave 1.25 0.4400 0.55

Course 2 19 mm Superpave 2.00 0.4400 0.88

Total Daily ESALs 13

Total Design Period ESALs 94,900

Proposed Flexible Full Depth Pavement Structure

Thickness

(inches)

Structural

Coefficient

Structural

ValueCourse Material

1,300 100.00Single Unit Truck 0.50 0.40 3

Multi Unit Truck 0.50 1.50 10

User Defined 18-KIP ESAL 0.00 Calculated 18-KIP ESAL 0.95

Non-Standard

Value Comment

Design Loading (Calculated 18-KIP ESAL)

Mean AADT, VPD LDF (%) Vehicle Type Volume (%) ESAL Factor Daily ESAL

Design Data

Lane Distribution Factor (%) 100.00 Soil Support Value 2.50 Single Unit ESAL 0.40

Terminal Serviceability Index 2.50 Regional Factor 1.80 Multiple Unit ESAL 1.50

Final Design Year 2035 Final AADT, VPD 1,300 SU Truck % 0.50 Curb & Gutter/Barrier Yes

Mean AADT, VPD 1,300 MU Truck % 0.50

Project Description Howell Ferry Road

Traffic Data (AADTs are one-way) Miscellaneous Data

Initial Design Year 2015 Initial AADT, VPD 1,300 24 Hour Truck % 1.00 Lanes in one direction 1

Flexible Pavement Design Analysis

PI Number 0000000 County(s) Gwinnett

Project Number 71.4014 Design Name Full Depth Reclamation - Howell Ferry Rd

Documents

EXISTING PAVEMENT EVALUATION WILLMER ENGINEERING INC