CN-370000-BS135-T11.pdf

Independent Technical Peer Review of Reports and Recommendations for

Lake Asbury North Dam, Lake Asbury South Dam, and Lake Ryan Dam Green Cove Springs, Clay County, FL

SCOPE OF SERVICES

Background and Project Description:

Mott MacDonald is pleased to submit this proposal to the Florida Department of Environmental Protection (FDEP) to conduct required professional engineering services for an Independent Technical Peer Review of reports and recommendations to the Florida Department of Environmental Protection, Dam Safety Program (Department) for the three High Hazard Potential dams, owned by the Lake Asbury Municipal Services Benefit District (LAMSBD), Green Cove Springs, Clay County, Florida.

PROJECT INFORMATION

The requested services include:

1. Review two reports:

a. Report of Dam Assessment, Lake Asbury North and South Dams, Lake Ryan Dam, Lake

Asbury, Florida (105 pages); and

b. Report of Geotechnical Exploration, Lake Asbury Dam Stability Analysis, Lake Asbury Florida

(284 pages).

2. Provide recommendations to the Department on:

a. whether the reported conditions of the subject dams and associated appurtenant works are so dangerous to the safety of life or property as to warrant immediate actions, or the issuance of an Order to the dam owner directing immediate maintenance or operational changes; and

b. what additional information, or what interim or emergency measures may be necessary to protect the safety of life or property, until the dam owner may complete permanent rehabilitation of the subject structures to render them in a satisfactory condition.

SCOPE OF SERVICES

Task 1: Independent Technical Peer Review

The following work tasks will be performed to assess, analyze, interpret, and evaluate design/engineering and construction criteria as well as conformance with Standard Practice procedures for the examination and Safety Evaluation of Existing Dams.

• Attend an initial meeting, which will include a verbal briefing on preliminary findings with the Department, Mott MacDonald and other relevant parties.

• Review Report of Dam Assessment, Lake Asbury North and South Dams, Lake Ryan Dam, Lake Asbury, Florida (105 pages).

• Review Report of Geotechnical Exploration, Lake Asbury Dam Stability Analysis, Lake Asbury Florida (284 pages).

• Review applicable USACE and US Bureau of Reclamation Policies for the design and construction of earth-fill dams, retaining and floodwalls, sheet pile design, conduits, culverts and pipes, seepage analysis and control for dams, design of reservoir outlet works, slope stability and settlement analysis.

• Focus on the technical aspects of the dam evaluations, to establish if there are any “fatal flaws” in the dam examination/assessments and to see if anything significant has been overlooked;

but not to conduct detailed back checking of calculations, computations and model analyses.

• Address questions such as:

o Were the engineering methods, models and analyses used in the examination of the dams adequate and acceptable?

o Were the models used to assess the hazards appropriate, and were the analyses assumptions appropriately documented and explained?

o Does the examination and analyses adequately address the uncertainty given the consequences associated with the potential for loss of life and life-line economic losses, if any of the dams were to fail?

o Have the characteristics and conditions leading to a potential dam failure along with potential impacts and consequences identified and described?

o From a public safety perspective, are the proposed dam evaluations recommendations reasonably appropriate; or are there other mitigating solutions that should be considered?

DELIVERABLES:

1.) Electronically submit a preliminary evaluation in ten calendar days from executing the task assignment, including a preliminary letter summary of initial findings to the Department, highlighting whether interim or emergency measures should be implemented.

2.) Electronically submit a completed certified Final Letter Summary Report, including recommended interim or emergency measures, within sixteen calendar days of executing the task assignment.

Performance Measure: Deliverables will be reviewed by the Department to confirm that they are complete, accurate, and timely.

Key Personnel

FDEP

Role Name Entity

Project Manager Tracy Woods FDEP Contract Manager Genita Alexander FDEP

Mott MacDonald Role Name Entity

Project Principal David Skipper Mott MacDonald Project Manager James Johnson Mott MacDonald

Principal Engineer Michael Cox Comak Group

Project Schedule: CONSULTANT is available to begin work on this project immediately following receipt of an executed Task Assignment from FDEP.

Compensation and Method of Payment

Compensation to be paid to the Consultant for providing the services described herein shall be on a fixed-price basis for each Task Deliverable. No compensation will be paid for services and/ or tasks that are not performed. The fixed-price compensation for each Deliverable shall be as listed in the detailed Payment and Deliverables Schedule Table. See Appendix A for Payment and Deliverables Schedule Table.

The Consultant will submit invoices to the FDEP for work performed at the completion and acceptance by FDEP of each deliverable. Invoicing will be accompanied by a brief description of the work effort completed, including deliverables achieved, in accordance with the attached Fee Schedule.

Compensation will not be paid for a deliverable until the deliverable has been completed and accepted by the FDEP.

1. AUTHORIZATION

This following individual is a representative for the CONSULTANT with the authority to enter into a binding Contract with the FDEP:

Signature Date

Name and Title

David Skipper, PE – Senior Vice President

Company Name

Mott MacDonald Florida, LLC

3/09/2021

Appendix A

PAYMENT AND DELIVERABLES SCHEDULE

For all tasks, payment shall be made on a fixed price basis in the fixed amounts specified below for each deliverable following receipt and acceptance by the FDSP in accordance with Contract Terms.

Deliverable Deliverable Description Due Date Total

Payment Amount

Task 1 Independent Technical Peer Review 1.) Preliminary letter summary and verbal briefing 2.) Final Independent Technical Peer Review Letter Report

3/26/2021 $5,363.53

TOTAL $5,363.53