Hereford2CapeMay_IndustryDay_Presentation.pdf

INDUSTRY DAY 2023

Hereford Inlet to Cape May Inlet Coastal Storm Risk Management Project Cape May County, NJ

Initial Construction

9:45 REGISTRATION

10:00-10:15 INTRODUCTIONS

10:15-10:45 SCOPE REVIEW

10:45-11:45 INDUSTRY DAY QUESTIONS/ DISCUSSION

11:45-12:00 WRAP-UP

12:15-12:45 SITE VISIT

USACE and NJDEP aim to release Plans and Specifications that are easily understandable, biddable by qualified contractors and constructable with current technology and industry practices.

The purpose of today’s meeting is to solicit input from the marine construction industry and engage in discussions regarding the proposed project to produce high quality construction documents.

INDUSTRY DAY 2023 PROGRAM OVERVIEW

PROJECT OVERVIEW

All drawings and details are presented for discussion purposes and subject to change

BORROW AREA

This represents the permitted borrow. The intent is to use as minimal an area as possible based on the existing conditions at the time of construction. The permissible borrow area under contract is assumed less than the area currently shown.

Overall, the goal is to develop an affordable beach mining protocol that works with nature so that after the mining operation is completed, the beach reaches a new equilibrium condition rapidly, looks natural, and is safe for beach-goers to enjoy.

1. A goal of the project is reducing outfall clogging/maintenance. Priority for dredging locations may be given to areas around existing outfalls.

2. The contract potentially will require dredging operations to begin in Wildwood Crest

3. The intent is to dredge uniformly longitudinally along the beach and not perpendicular to the shoreline. After dredging beach conditions should not have pronounced ridges or scalloping along the shoreline

BORROW AREA DREDGING

PROJECT LAYOUT

Lower Township

PLAN VIEW

NORTH WILDWOOD TYPICAL CROSS SECTION

TYPICAL SECTIONS WILDWOOD/WILDWOOD CREST

TYPICAL SECTION LOWER TOWNSHIP

PEDESTRIAN AND VEHICULAR ACCESS

1. With the location of the borrow area and without being allowed to remove sand outside of this boundary, how would you access the borrow (land, sea or combination)?

2. With the known details for dredging within the borrow area, what type of equipment would you propose to use?

3. Sand placed in North Wildwood for berm construction must be hydraulically placed. In other areas of the project this restriction may not apply. How would you transport and place sand in Wildwood, Wildwood Crest and Lower Township?

4. Based on your anticipated means and methods and proposed equipment, what are the minimum staging requirements and what are the minimum dimensions required for access points?

5. What are the maximum wave heights that dredging within the surf zone would be feasible.

REQUEST FOR INFORMATION DISCUSSION

6. Required back passing distances could be between 5,000 and 22,000 feet. Using a mobile submersible pump:

1. What diameter discharge pipe would be proposed?

2. What would be the estimated losses during pumping?

3. If work hours are assumed 24hours/day, what is the range of production rates (volume sand placed) that could be reasonably accomplished?

7. If sand removal below the MLW is limited to September (Labor Day) – May (Memorial Day), and there are no time restrictions above this point, how would you sequence construction?

8. Is it feasible to track volume for payment based on the BD/ADs similarly to standard USACE beach renourishment projects?

9. The contract may require placement of fill around and under existing features such as piers and outfalls.

How would this impact placement methods? What challenges do you foresee with placement?

REQUEST FOR INFORMATION DISCUSSION

• Market Research and Sources Sought Notification

• Pre-Solicitation Notice Published

• Solicitation Published

• Contract Award

• ALL DATES SUBJECT TO CHANGE

March 2024

December 2024

May 2025

June 2025

ANTICIPATED SCHEDULE

Please contact Cheley Auguste with any follow-on questions or additional information you can provide:

Cheley.auguste@usace.army.mil

CONTACT INFORMATION

BACK UP SLIDES

POTENTIAL DREDGING EQUIPMENT IDEAS

POTENTIAL DREDGING EQUIPMENT IDEAS

Volume Backpassed

(CY)

Working Hours per Day Working Days per Week Average Production Rate cy/hr

Average Daily Production Rate cy/day

Average Weekly Production cy/week

Job Duration (months)

1,000,000 24 7 300 7,200 50,400 4.5

1,000,000 16 6 300 4,800 28,800 7.9

1,000,000 12 5 300 3,600 18,600 12.6

1,000,000 24 7 450 10,800 75,600 3

1,000,000 16 6 450 7,200 43,200 5.3

1,000,000 12 5 450 5,400 27,000 8.4

POSSIBLE PRODUCTION RATES

TYPICAL CROSSOVERS