11-2025-08-27 Pine Island Strux Pre-Bid Presentation printfriendly.pdf

Town of Hilton Head Island, SC

PINE ISLAND BREAKWATER

PROJECT

IFB #: 2025-23

Pre-Bid Conference

Town of Hilton Head Island, SC

Hilton Head Plantation

August 26, 2025, 11:00am

Project Overview & Purpose

Gated

Access

Port Royal

Sound

Skull Creek

PINE ISLAND

Marshlands Dolphin

Head Rec

Area

Erosional

Beach

Accretional

Spit

Direction of Sand Transport

Site Overview

Tidal

Range

8-10 FT

Beach Fill to be Completed by

Others Prior to Construction

(Fall 2025)

SOFT SOIL

CONDITIONS

Contract Schedule

Date Event

1.) August 12, 2025 Bid Advertised

2.) August 26, 2025 at 11:00 a.m. Mandatory Pre-bid Conference

3.) September 3, 2025 at 5:00 p.m. Deadline to submit questions

4.) September 11, 2025 at 5:00 p.m. Bid Submittal

5.) September 12, 2025 at 9:30 a.m. Virtual Bid Opening

6.) Within 7 Days of Bid Opening (Goal) Owner issues Notice-of-Award

7.) Within 10 Days of Notice of Award Contractor provides signed Contract, Insurance Documentation and Bonds

8.) Within 30 Days of Receipt of Signed Owner executes Contract and issues

Contract and Bonds Notice-to-Proceed (NTP)

Bid Schedule of Quantities

Estimated

Quantity Units Unit Cost Cost

1 Town Business License 1 allowance 25,000$ 25,000$

2 Mobilization/Demobilization 1 lump sum $ $

3 Armor Stone 9,870 ton $ $

4 Chinking Stone 1,740 ton $ $

5 Stone-Filled Marine Mattresses - Size 1 (22'x6.5'x0.5') 32,032 sqft $ $

6 Stone-Filled Marine Mattresses - Size 2 (18'x6.5'x0.5') 7,722 sqft $ $

7 Geogrid / Fabric Composite 14,800 sqft $ $

8 Structure Inspection and Vibration Monitoring 1 lump sum $ $

9 Signage 1 lump sum $ $

* Actual quantities to be placed and accepted may vary from Base Bid by +/- 20 percent (%) or less.

IFB# 2025-23

TOTAL

Item

BID

Discussion on Stone at End of Presentation

General

• Basis for Award

• Lowest most responsible, responsive bidder

• Proposed construction schedule

• Methods of mobilization/demob

• Personnel and equipment committed

• Qualifications and experience

• Contract Schedule/Town Council Approval-

Execution Process

General

• Permits included with bid documents

• Retainage 10%

• Rock quantities for payment to be certified by truck load weigh tickets

• Rock placement to be verified by survey

• Conduct vibration monitoring and control throughout project

Order of Work

• Establish staging/access area

• Complete furthest structure from access back to nearest (S6 to S1)

• Excavation

• Foundational treatments

• Stone placement

• Backfilling/washing sand into voids

• Install warning sign

• Site Restoration

Operations

• Staging/access: Dolphin Head Rec Area

• Works Days/hours

• M-F: 7 AM to sunset; Sat: 8 AM to 5 PM

• Material/equipment deliveries: M-F: 7 AM to 6 PM

• No work Sundays and Holidays

• Mattresses to be assembled & filled offsite

• Stone clean & free of debris

• Separated into piles of similar size at staging area

Materials

• Armor Stone (discussion at end)

• Marine Mattresses (Tensar BX 1500, or equivalent)

• Size 1: 22’ x 6.5’ x 0.5’

• Size 2: 18’ x 6.5’ x 0.5’

• Geotextile Fabric (US Fabrics US1540, or equivalent)

• Geogrid/Fabric Composite (Tensar GC654050, or equivalent)

• Timber pile warning sign

• Location to be coordinated with Town

Staging/Access

Limits to be field verified

Structure Layout

Size 1

Mattresses

Size 2

Mattresses

Geogrid/Fabric

Composite

Structure Layout

Size 1

Mattresses

Size 2

Mattresses

Geogrid/Fabric

Composite

Warning

Sign

Structure Cross-Sections

Excavation

Limit

Excavation

Limit

All side slopes 2H:1V

Structure Cross-Sections

Marine Mattresses

2’ Extension for

Overlapping

Questions/Discussion