ESBD_552546_1788981989509_Addendum_1 CBBEP Matagorda Island Unit of Aransas NWR Berm Repairs.pdf

HDR Engineering, Inc. 10462976

Addendum No. 1

COASTAL BEND BAYS & ESTUARIES PROGRAM

ADDENDUM NO. 1

INVITATION FOR BIDS, SPECIFICATIONS & CONTRACT DOCUMENTS FOR

MATAGORDA ISLAND UNIT OF ARANSAS NWR, BERM REPAIRS

SEPTEMBER 8, 2026

TO ALL POTENTIAL BIDDERS:

This addendum shall be considered part of the Contract Documents and is issued to change, amplify, or delete from or otherwise explain the drawings and specifications where provisions of this addendum differ from those of the original contract documents. This addendum shall have precedence over the original drawings and specifications and shall govern.

Respondents are hereby notified that they shall incorporate this addendum in their bid, and it shall be construed that the Contractor's Bid shall reflect with full knowledge, all items, changes and modifications to the Contract Documents herein specified.

RESPONDENTS SHALL ACKNOWLEDGE RECEIPT OF THIS ADDENDUM IN THE SPACE

PROVIDED ON THE BID FORM.

ATTACHMENTS:

Meeting Minutes from the Pre-Bid Meeting held on August 27th Questions and Answers from prospective bidders through September 4th PowerPoint Presentation slides from the Pre-Bid Meeting held on August 27th

END OF ADDENDUM NO. 1

OWNER: COASTAL BEND BAYS & ESTUARIES PROGRAM

ENGINEER: HDR ENGINEERING, INC.

10462976

Meeting Minutes Project: CBBEP Matagorda Island Unit of Aransas NWR, Berm Repairs

Subject: Pre-Bid Conference Meeting

Date: Thursday, August 27, 2026

Location: Virtual - Teams

Attendees: Rosario Martinez, CBBEP Felipe Prieto, USFWS Cameron Perry, HDR Stephanie Rogers, HDR Hunter Balbin, HDR Aaron Lawrence, HDR

Ken Lester, Lester Contracting Juan Vazquez, Shell Construction Dan Goeddel, Luhr Crosby

This memorandum documents key information exchanged during the pre-bid meeting held via

Microsoft Teams virtual conference call on August 27, 2026.

Project Description:

A. HDR provided a description of the project background, site conditions, accessibility, and the work to be performed. Highlighted parts of the work included the two locations along the berm, owner furnished materials, and environmental considerations.

B. A summary of the discussion is provided in the attached PowerPoint presentation

C. U.S. Fish and Wildlife Service provided recommendation of using high water levels early in the season (October / November) to mobilize and working onsite later in the season (December /

January / February) during lower water levels.

Questions and Answers:

A. No questions were asked during this meeting.

Important Dates:

A. Site Visit – 08/28, meeting at 9:00 A.M. at ANWR Headquarters

B. Deadline for Questions – 09/11/2026 at 5:00 PM, send all questions to Julie Morris

C. Deadline for Bids – 09/18/2026 at 2:00 PM delivered to HDR office (555 N Carancahua St, Ste

1600, Corpus Christi, TX 78401)

Project: CBBEP Matagorda Island Unit of Aransas NWR, Berm Repairs

Subject: Prospective Bidder Questions and Answers

Date: Tuesday, September 08, 2026

This memorandum documents questions from prospective bidders received through September 4th and the Owner’s response.

Questions and Answers:

Question 1: Is the U.S. Fish and Wildlife Service dock in Port O’Conner available for this project?

Answer 1: Yes, U.S. Fish and Wildlife Service have agreed for the use of their dock within Port

O’Conner for the usage of moving materials and equipment to the north dock on Matagorda Island.

The U.S. Fish and Wildlife Service dock is located at: 28°26'15.35"N, 96°25'6.23"W

The Contractor shall not have exclusive use of the dock and shall be responsible for coordinating all dock access and operations with the U.S. Fish and Wildlife Service. The Contractor shall schedule dock usage in advance and conduct its operations in a manner that does not interfere with USFWS activities. Any limitations on dock availability, access times, or operational restrictions imposed by

USFWS shall be incorporated into the Contractor's work planning and schedule.

Question 2: Will standby time be paid for Whooping Crane delays and will there be a time extension for the contractor?

Answer 2: In the event that construction activities are suspended due to restrictions associated with whooping crane conservation measures, the Contractor may be entitled to compensation for documented and substantiated standby costs and/or an adjustment to the Contract Time, subject to review and approval by the Owner.

Requests for compensation or additional Contract Time shall be submitted in accordance with the

Contract requirements and shall include sufficient documentation substantiating the cause of the delay, the duration of the impact, and the resulting effect on the Contractor's operations and project schedule.

Documentation may include:

• The date, time, and duration restrictions were imposed.

• Documentation of notification to the Designated Whooping Crane Specialist and the response received.

• Daily reports documenting when work stopped and the work activities affected.

• Crew and equipment logs showing resources that were unable to perform work.

• Evidence that alternative work could not reasonably be performed.

• The resulting impact on the project schedule.

The Contractor shall take reasonable measures to mitigate delay impacts, including resequencing work where practical. Any determination regarding compensation for standby costs or adjustment of

Contract Time will be based on the specific circumstances of the delay and the documentation provided, and will be made by the Owner in accordance with the Contract.

© 2014 HDR, Inc., all rights reserved.

Pre-Bid Conference August 27, 2026

Matagorda Island Unit of Aransas NWR, Berm Repairs

01 Introduction

02 Plan Review

03 Construction Considerations

04 Bidding Details

05 Site Visit Discussion

▪ Matagorda Island Unit is part of Aransas National Wildlife Reserve

▪ Western marsh has series of interior berms for access

▪ Culverts along berms to allow water flow/tidal connection

▪ Hurricane Harvey (2017) breached berms and damaged culverts

▪ Repair project conducted in 2023, this project addresses further repairs not previously funded.

Project resulted in misc. materials remaining on site and available for this work

Introduction

Project Background

▪ Conduct repairs at 2 discrete locations o BC-SR-1: replace culverts o DC-SR-1: fill breach and install culverts

▪ Install graded riprap shoreline protection

▪ Top berm with recycled asphalt

Other Considerations:

▪ Use on-site materials to the extent possible

▪ No water access to the work areas – land-based work.

▪ Adjacent to environmentally sensitive habitat (marsh, oysters, seagrass)

▪ Whooping Crane conservation measures

Introduction

Project Purpose

Project Vicinity

Project Area

(Repairs)

Barge Dock

▪ Equipment/Material access at north end

▪ Repair sites at south end

▪ Boat dock use at south end

▪ Approx. 25 miles from barge dock to USFWS area at south end of island

▪ Site Access

Project Location

South End

BC-SR-1

DE-SR-1

BOAT DOCK

SAND BORROW

Mobilization/Demobilization

Construction Surveys

Access Road Improvements

Install New 36” HDPE Culverts

Cap Berm with Recycled Runway Materials

Install Shoreline protection (riprap)

Restore (fill) breach

BC-SR1

Site Photos

▪ BC-SR-1

Typical Sections

• Oyster Shell / Recycled Runway Material

• Bedding Stone

• Recycled Debris Aggregate

• Sand Fill

• Geotextile

• 36” HDPE Culverts & Anchoring

Not to scale

Site BC-SR-1

DE-SR1

June 2, 2026

DE-SR-1

Site DE-SR-1

2019 2026

Site DE-SR-1

Owner Provided Materials

Graded Riprap

Sand

Concrete Debris

Bedding Stone

Airport Runway Oyster Shell Asphalt

▪ Estimated Quantity 1020 CY

▪ Specification: R-150 GRR

Graded Riprap

Estimated Quantity

• Bedding Stone: 45 CY (TXDOT Item 247, Type A, Grade 1 aggregate)

• Sand Fill: 4,200 CY (to be harvested)

Bedding Stone and Sand Fill

▪ Quantities Not Estimated by Engineer

▪ Significant Clearing and Grubbing may be required

Berm Sand Borrow Sources

▪ Harvested (milled, not processed) – 45 CY

▪ Available (in-situ) – 677k SY

Oyster Shell / Recycled Runway Mix Material

▪ Estimated Quantity: 300 CY

▪ Will require material processing: 9” x 6” and removal of unsatisfactory materials and reinforcement cut flush or removed.

Concrete Debris

Construction Considerations

Site Photo

▪ Washout along existing berm access route

▪ June 2, 2026

▪ North-end Barge Dock

Construction Considerations

▪ Remote site location – limited access for equipment/materials at north end

▪ No water access to project site – all work to be land based

▪ Adjacent to environmentally sensitive habitat (marsh, oysters, and seagrass)

▪ Tidal activity at breaches

▪ 25-mile unimproved access road from north end to south end

▪ Road and access along levees may need maintenance

▪ Weather may impact use of road and access levees

▪ Boat access at north and south ends

▪ Others working at the site (oil and gas decommissioning)

▪ Matagorda Island hunts 2026: November 16 – 18, November 30 – December 2, December 12 – 13, 19 – 21

▪ No recreational access will be granted to selected Contractor

Whooping Crane Conservation Measures

▪ Starting November 1st or as soon as the first crane arrives

▪ An Endangered Species Monitor with stop-work authority shall have the sole responsibility of monitoring the active work areas for endangered species.

▪ Work closely with the Designated Whooping Crane Specialist (Felipe Prieto)

▪ Work should cease if a crane appears within 1,000 feet

▪ Limit project activities to daylight hours to the extent possible

Surveys

▪ Registered TX professional land surveyor is required

▪ Initial performed prior to filling and culverts

▪ Interim surveys prior to culvert placement, shoreline protection

▪ Survey transects provided in drawings

▪ Provide with payment applications

Construction Schedule

▪ Contractor shall commence mobilization before December 1, 2026

▪ Contractor shall complete all on-island work items by February 28, 2027

Measurement-Basis of Payment

▪ Payment per linear foot – levee cap

▪ All other items lump sum (% complete)

▪ Surveys accompany progress payments

▪ Substantial Completion – walk through and Certificate

▪ Access and staging areas – return to pre-project conditions

▪ Clean up/Punch List and Final Completion

Bid Form

Bidding

▪ Question Deadline – September 11th at 5:00 pm (all by email to Julie)

▪ Bid Deadline – September 18th at 2:00 pm: Deliver to HDR office

▪ Part 3 C-1 Proposal Requirements and Conditions (Page 73 of the PDF) o Proposal o Bid Bond o Qualifications Statement o Preliminary Schedule

Site Visit

▪ Limited space so only one person per Contractor

▪ Owner may schedule additional trips, if needed

▪ Meeting at ANWR headquarters at 9:00 am on August 28th

▪ Travel by boat to Matagorda Island

▪ Travel by FWS truck between north and south ends (limited capacity).

▪ Bring life jacket if you have one

▪ May want to bring along water/snacks, mosquito spray, sun block, drone

Questions

Contact:

Julie Morris

Julie.Morris@hdrinc.com