Project Information

Bid Title

Bunten Road Park Improvement Project

Issuing Agency

City of Duluth

Location

Georgia

Published Date

Dec 23, 2025

Closing Date

Jan 22, 2026

Government Level

State & Local

Status

Closed

Original Source

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Project Description

Description	Opening Date/Time	Closing Date/Time
Bunten Road Park Improvement Project Geotech RPT	December 10, 2025 :	January 22, 2026 11:00 AM

Attachment Preview

Proposal Cov er Page

Bunten Road Park

Report Cover Page

Improvements

Duluth, Gwinnett County, Georgia

Geotechnical Engineering Report

December 12, 2024 | Terracon Project No. 49245278

Prepared for:

Columbia Engineering

2862 Buford Highway, Suite 200

Duluth, Georgia 30096

Report Cov er L etter to Sign

December 12, 2024

2105 Newpoint Place, Suite 600

Lawrenceville, GA 30043

P (770) 623-0755

Terracon.com

Columbia Engineering

2862 Buford Highway, Suite 200

Duluth, Georgia 30096

Attn: Ms. Erin White, PLA

P: (678) 769 8901

E: erinwhite@columbia-engineering.com

Re: Geotechnical Engineering Report

Bunten Road Park Improvements

3180 Bunten Road

Duluth, Gwinnett County, Georgia

Terracon Project No. 49245278

Dear Ms. White:

We have completed the scope of Geotechnical Engineering services for the above

referenced project in general accordance with Terracon Proposal No. P49245278 dated

October 11, 2024. This report presents the findings of the subsurface exploration and

provides geotechnical recommendations concerning earthwork and the design and

construction of foundations for the proposed project.

We appreciate the opportunity to be of service to you on this project. If you have any

questions concerning this report or if we may be of further service, please contact us.

Sincerely,

Terracon

E. Kelly Watson, P.E.

Senior Geotechnical Engineer

William J, Sheffield, P.E.

Principal / Department Manager - Geotechnical

Facilities | Environmental | Geotechnical | Materials

Geotechnical Engineering Report

Bunten Road Park Improvements | Duluth, Gwinnett County, Georgia

December 12, 2024 | Terracon Project No. 49245278

Table of Contents

Report Summary .............................................................................................. i

Introduction.................................................................................................... 1

Project Description.......................................................................................... 1

Site Conditions ................................................................................................ 2

Geotechnical Characterization ......................................................................... 3

Site Geology ............................................................................................ 3

Typical Subsurface Profile .......................................................................... 4

Groundwater ............................................................................................ 5

Infiltration Rate .............................................................................................. 6

Geotechnical Overview .................................................................................... 6

MSE or Gabion Wall................................................................................... 6

Paved Multi-Use Trails ............................................................................... 7

Earthwork ....................................................................................................... 8

Site Preparation........................................................................................ 8

Subgrade Preparation ................................................................................ 8

Existing Fill .............................................................................................. 9

Excavation............................................................................................... 9

Fill Material Types ....................................................................................11

Fill Placement and Compaction Requirements ...............................................11

Utility Trench Backfill................................................................................12

Grading and Drainage...............................................................................13

Groundwater Considerations ......................................................................13

Earthwork Construction Considerations .......................................................13

Construction Observation and Testing .........................................................14

General Comments ........................................................................................ 14

Attachments

Exploration and Testing Procedures

Photography Log

Site Location and Exploration Plans

Exploration and Laboratory Results

Supporting Information

Note: This report was originally delivered in a web-based format. Blue Bold text in the

report indicates a referenced section heading. The PDF version also includes hyperlinks

which direct the reader to that section and clicking on the

logo will bring you

back to this page. For more interactive features, please view your project online at

client.terracon.com. Refer to each individual Attachment for a listing of contents.

Facilities | Environmental | Geotechnical | Materials

i

Geotechnical Engineering Report

Bunten Road Park Improvements | Duluth, Gwinnett County, Georgia

December 12, 2024 | Terracon Project No. 49245278

Report Summary

Topic 1

Overview Statement 2

Project

Description

The project will include reconstruction of the existing paved multi-

purpose trails and parking areas, new retaining walls, and storm

drainage, landscaping, and various other ADA improvements.

Geotechnical

Characterization

Some areas of existing fill up to 5 of more feet deep.

Hand auger refusal occurred in all of the borings at the proposed

MSE/Gabion wall. Depths ranged from about 3 to 5½ feet.

Difficult excavation techniques may be required for excavations at

the MSE/Gabion wall.

Groundwater not observed in the borings during our exploration.

Earthwork

Existing lean clays, sandy silt, and silty sands can be used for

engineered fill.

Clays should not be used as wall backfill.

General

Comments

This section contains important information about the limitations

of this geotechnical engineering report.

1. If the reader is reviewing this report as a pdf, the topics above can be used to access

the appropriate section of the report by simply clicking on the topic itself.

2. This summary is for convenience only. It should be used in conjunction with the entire

report for design purposes.

Facilities | Environmental | Geotechnical | Materials

i

Geotechnical Engineering Report

Bunten Road Park Improvements | Duluth, Gwinnett County, Georgia

December 12, 2024 | Terracon Project No. 49245278

Introduction

This report presents the results of our subsurface exploration and Geotechnical

Engineering services performed for the proposed Improvements to Bunten Road Park.

The purpose of these services was to provide information and geotechnical engineering

recommendations relative to:

■ Hand auger boring logs with dynamic cone penetrometer (DCP) data.

■ Soil stratification based on visual soil classification.

■ Groundwater levels observed during and after the completion of drilling.

■ Site Location and Exploration Plans.

■ Subsurface exploration procedures.

■ Description of subsurface conditions.

■ Earthwork recommendations including use of on-site soils as structural fill,

structural placement, excavation conditions, groundwater control, and

site/subgrade preparation.

■ Comments on the stability of the slope and MSE wall and a design foundation

bearing pressure.

■ Measured walking trail pavement thicknesses at 6 locations.

■ Infiltration rate testing results at 4 on-site stormwater treatment facilities

Drawings showing the site and boring locations are shown on the Site Location and

Exploration Plans, respectively.

Project Description

Our initial understanding of the project was provided in our proposal and was discussed

during project planning. A period of collaboration has transpired since the project was

initiated, and our final understanding of the project conditions is as follows:

Item

Information

Provided

Description

The following plans were provided in an emailed RFP from Erin

White dated 9-30-24:

 ADA and Trail Improvements, Bunten Road Park, Concept

Plan, Sheet 1, dated 2-26-24.

 Bunten Park – grading and concept plan for Flex/MSE Wall

 Bunten Road Park Improvement Project, Preliminary

Construction Plans (60% set), dated 5-23-24.

Facilities | Environmental | Geotechnical | Materials

1

Commodity Codes

• NAICS 237310Highway, Street, and Bridge Construction

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