ESBD_463384_1761073622333_Addendum No.1.pdf

Date: October 21, 2025

ADDENDUM #1

To the proposal documents for RFP# 808-26-243630, Autonomous Survey Vessel Survey for Texas Historical Commission

RFP Submittal Deadline: November 21, 2025, 2:00 PM CT

This addendum forms a part of the Contract Documents and modifies the RFP Documents issued October 20, 2025, as noted below:

The Respondent's attention is directed to the fact that addendum item and specifications as noted herein are not necessarily referenced to all occurrences in the documents.

Respondent shall acknowledge receipt of this addendum where indicated; failure to do so may subject the Respondent to disqualification.

This addendum consists of four (4) pages, including this page.

This Addendum updates sections 2.2 Reporting and Deliverables and Exhibit E, Price Schedule including updating RFP# from 808-25-243630 to RFP# 808-26-243630 in the RFP. Respondents are required to complete the revised Exhibit E, Price Schedule which outlines the cost breakdown for Phase I and Phase II and submit it with their RFP bid packet.

Revise Sections:

2.3 REPORTING AND DELIVERABLES.

Responsibilities include field data acquisition, processing and interpretation of remote-sensing data, and preparation of data figures and summary survey information for the required technical report. Raw magnetic data will be shared with the project team for processing and incorporation into the larger overall larger project area magnetic contour figures.

Services are expected to take place between the period covering December 10, 2025 through August 31, 2027. An initial meeting or conference call to agree on work schedule and approach must be scheduled to occur within (2) two weeks of last signature date of contract. Services shall be performed under the coordination of THC’s Archeology Division.

Benchmarks shall be established based on the Respondent’s project information provided in their proposal, which must include a timeline/schedule of work that outlines how and when Respondent proposes to complete the project.

It is the awarded Respondent’s sole responsibility to ensure that all status reports are delivered to the proper recipient(s) at the proper time. Documents will be considered delivered only when received by THC’s designated Project Manager. Services are deemed completed when THC has reviewed the reports, all requested revisions have been addressed, and THC has given final, written approval of all services required by the contract.

EXHIBIT E

PRICE SCHEDULE

Having carefully examined the Requests for Proposal for Autonomous Survey Vessel Survey for the Texas

Historical Commission and all other contract documents, this undersigned proposes to the required services for a sum of:

Basic Proposal Items Lump Sum Price

Task 1-Autonomous Survey Vessel (ASV) Survey

Services (7 days of survey including mileage/meals/lodging).

Task 2- Data processing, analysis, and assistance in preparation of the technical report.

LUMP SUM PRICE $

Vendor Name: ___________________________________________________

Address: __________________________________________________

Email Address: __________________________________________________

Print Name: ____________________________________________________

Signature: ______________________________________________________

Title: __________________________________________________________

(Exhibit E, Price Schedule is for the convenience of the contractor to accurately estimate costs. The total amount of the contract will not exceed the total price schedule. It is the responsibility of the Applicant (Contractor) to pay for all expenses incurred during the performance of the contract. These expenses will be reimbursed by using funds from the total amount of the contract according to the payment schedule of the contract.)

NOTE: THIS FORM MUST BE COMPLETED & RETURNED WITH THE SUBMITTAL

END OF ADDENDUM

Bidder acknowledges receipt of the following addenda: Addendum #1__________(initial)

WARNING: BIDDER’S FAILURE TO ACKNOWLEDGE RECEIPT OF ADDENDA MAY RESULT

IN REJECTION OF THE PROPOSAL.