REQUEST_FOR_PROPOSAL_ENGINEERING.docx

REQUEST FOR PROPOSAL (RFP): ENGINEERING SERVICES

PROJECT: DONNIE AVOCADO 138kV SUBSTATION Owner: City of Homestead / Homestead Energy Services (HES)

1. PROJECT OVERVIEW

The City of Homestead Energy Services (HES) is seeking proposals from qualified engineering firms (“Consultant”) to provide comprehensive engineering and design services for the new Donnie Avocado Substation. This project consists of all engineering activities required for a new distribution substation rated at 138 kV / 13.2 kV with a net output capacity of 89 MVA.

The facility will be located in Homestead, Florida. The design must facilitate a loop-in/loop-out configuration from the existing 138 kV transmission line between HES Lucy and FPL Davis substations.

2. GENERAL DESIGN SCOPE

The Consultant shall be responsible for the following primary design elements:

· Transmission Interface: Two (2) 138 kV transmission line feeds, two (2) 138 kV line switches, and one (1) 138 kV disconnect switch configured as two radial lines with a bus tie.

· Power Transformers: Two (2) 138 kV / 13.2 kV, 44.8 MVA power transformers.

· High Voltage Protection: 138 kV circuit switchers with an interrupting rating of 20 kA.

· Medium Voltage Bus: 13.2 kV outdoor double bus rated at 2000A.

· Feeders: Eight (6) load positions served by 13.2 kV, 1200A outdoor circuit breakers.

· Auxiliary Power: Two (2) power and light transformers for substation AC requirements.

3. DETAILED SCOPE BY DISCIPLINE

A. Structural and Civil Engineering

· Surveys & Geotechnical: Site boundary, topographical surveys, and geotechnical reports.

· Site Design: Grading and drainage plans, specifications, and drainage calculations.

· Structures: Design and calculations for bus structures, including load trees for concrete poles.

· Foundations: Detailed design and calculations for all equipment foundations.

· Perimeter: Fence plans and details.

· Environmental: SPCC (Spill Prevention, Control, and Countermeasure) plan11.

B. Substation Engineering (Physical Design)

· Arrangement: Electrical Single Line Diagrams, General Arrangements, and Electrical Sections.

· Grounding & Shielding: Grounding plan/study and Lightning shielding plan/study.

· Conduit & Cable: Conduit plans, cable trench drawings/details, and conduit schedules.

· Station Service: AC and DC station load studies, battery sizing, and station light/power calculations.

· Procurement Support: Development of Long Lead Material Lists and Equipment Specifications.

C. Protection and Control (P&C) Engineering

· One-Lines: Relay one-line and three-line diagrams.

· Schematics: AC and DC elementary (schematic) diagrams.

· Wiring: Interconnection relay panel wiring and remote wiring diagrams for all electrical equipment.

· Hardware: Relay panel arrangements and a comprehensive Bill of Materials (BOM).

4. REQUIRED STUDIES AND CALCULATIONS

Final reports for all studies must be signed and sealed by a Florida Registered Professional Engineer and include:

· Grounding and Lightning Shielding Studies.

· Lighting/Illumination Study.

· AC/DC Station Load and Battery Sizing Calculations.

· Substation Bus Strength Calculations.

5. PROJECT DELIVERABLES AND PHASES

The project shall follow a structured review process with submittals at the following intervals:

1. 30% Design Package: Focus on site layout, single lines, and long-lead equipment specs.

2. 60% Design Package: Detailed physical and structural design, including most studies and elementary diagrams.

3. 90% Design Package: Finalized drawings incorporating all previous comments and vendor-certified data.

4. Issued for Construction (IFC): Final signed and sealed package incorporating all HES comments.

5. As-Built Documentation: Processing of field markups within 30 days of construction completion.

6. PROPOSAL REQUIREMENTS

Consultants responding to this RFP should include:

· Project Approach: Detailed methodology for managing schedule, quality (QA/QC), and risks.

· Relevant Experience: Examples of 138kV substation designs performed in Florida.

· Project Team: Identification of the Project Manager and lead discipline engineers (PE licensure in Florida is required).

· Schedule: A proposed timeline from Award of Contract (ARO) through IFC submittal.