A04_NATC_347974_Melrose_Generator_SOW_2_0.pdf

STATEMENT OF WORK

Melrose Mansion Generator Replacement

PMIS #: 347974

Natchez National Historical Park

1 Melrose Montebello Parkway, Natchez, Mississippi 39120

Date: December 4, 2025

DIVISION 1 – GENERAL REQUIREMENTS

SECTION 01 10 00 – SHORT FORM GENERAL REQUIREMENTS

PART 1 – GENERAL

ITEM 1 – DESCRIPTION OF WORK

1.1 Background

The Melrose Mansion requires a reliable standby generator due to frequent outages that threaten climate control, security, and operations. The current generator is beyond serviceable condition and must be replaced.

1.2 Work Covered by the Contract Documents

A. Disconnect and remove the existing generator and automatic transfer switch (ATS) from site.

The equipment removed shall become the property of the contractor upon removal. All labor, equipment, transportation, handling, and disposition of the removed generator and ATS shall be included in the contractor’s bid price. No additional compensation will be provided for removal or disposal.

B. Furnish and install a new minimum 100 kW standby-rated, 3-phase, 120/208V, 60 Hz, natural gas standby generator.

C. Enclosure must be powder-coated aluminum, wind-rated to 180 MPH, finished in dark forest green. Color must be submitted to and approved by the COR prior to ordering.

D. Install a new ATS rated for at least 400A, in a NEMA 3R outdoor enclosure, also factory-finished in dark forest green.

E. Generator and ATS shall be installed on the existing pad. No pad modifications are required.

F. Provide all necessary connections, terminations, grounding, and protection per current code.

G. Commission system, perform full load testing, and submit test results.

H. Provide end-user training to designated park staff.

I. Submit warranties, O&M manuals, as-builts, and closeout documentation.

ITEM 2 – EXISTING UTILITIES

Contractor is responsible for verifying all utility connections and must not rely on Government-supplied data. Any shutdowns must be requested at least 48–72 hours in advance. Utility interruptions must be minimized and coordinated. No work shall proceed that disrupts utilities without prior written approval.

ITEM 3 – CONTRACTOR’S USE OF PREMISES

3.1 Site Access

Access to the site is via gravel road and gravel parking directly adjacent to the generator site. No grass access is permitted without the use of heavy-duty ground mats. Contractor is responsible for repairing any landscape damage at their expense.

3.2 Site Hours and Conduct

Work is permitted from 7:00 AM to 3:00 PM, Monday through Friday, excluding federal holidays. Work outside these hours or on weekends must be approved in writing by the COR at least 48 hours in advance. Disruptive work must be coordinated with the COR to avoid interfering with park operations or visitor access.

3.3 Facilities

A Government restroom is available within 100 yards and may be used during working hours.

No portable restrooms will be provided by the Government.

3.4 Housekeeping and Protections

Contractor must maintain a clean and safe site. No use of Government dumpsters is allowed.

Protect structures, vegetation, and historic features.

ITEM 4 – COMMENCEMENT, PROSECUTION, AND COMPLETION

All work must be completed within 150 calendar days from the Notice to Proceed. This includes procurement, custom finishes, installation, testing, training, and closeout. Zero weather days are included. Requests for time extension due to severe weather or force majeure must be submitted in writing within five (5) calendar days of the event and approved by the Contracting Officer.

ITEM 5 – SITE VISIT AND VERIFICATION REQUIREMENTS

A pre-bid site visit is highly recommended. The contractor shall send a qualified representative

(e.g., licensed electrician or generator technician) to evaluate site conditions. Contractor is responsible for verifying voltage, phase, pad size, wiring, conduit paths, grounding, and gas supply conditions. The COR will not provide design data or technical clarification. Failure to verify conditions will not be grounds for change orders.

The contractor is responsible for verifying that the proposed generator and ATS are correctly sized and compatible with existing electrical service, distribution panels, load requirements, and site conditions. Submission of a bid constitutes acknowledgment that the contractor has independently verified all system requirements and that the proposed equipment will operate as a complete and code-compliant system without additional compensation.

ITEM 6 – CODE COMPLIANCE AND SCOPE CONTROL

All work shall comply with NEC, NFPA 110, UL 2200, and all applicable federal, state, and local codes and regulations. Contractor must correct any existing deficiencies that would prevent a fully operational, code-compliant standby power system. The contract price shall be all-inclusive. No scope changes or additional compensation will be allowed for oversights, lack of site verification, incorrect assumptions, or failure to review applicable codes.

The Contractor shall provide all qualified personnel, licensed electricians, certified technicians, supervision, equipment, and specialty trades required to complete the work in accordance with applicable codes, manufacturer requirements, and inspection authorities. No additional compensation shall be provided for specialty personnel or technical services necessary to deliver a complete, operational, and code-compliant installation.

ITEM 7 – SAFETY AND ENVIRONMENTAL

Contractor shall comply with OSHA 29 CFR 1926 and all applicable federal, state, and local safety regulations. Contractor shall submit a site-specific Safety Plan to the COR prior to commencement of work. The Safety Plan shall address, at minimum: electrical safety and lockout/tagout procedures, equipment operation, fall protection (if applicable), ground protection measures, public and visitor safety controls, and emergency contact procedures. Contractor shall protect the historic environment, prevent soil contamination, maintain daily housekeeping, and immediately contain and remediate any spills. Safety Data Sheets (SDS) for all hazardous materials shall be maintained on site and available for review.

ITEM 8 – SUBMITTALS

8.1 Pre-Construction

• Generator and ATS cut sheets

• Sound attenuation ratings

• Color sample (dark forest green)

• Commissioning plan

• Training plan

• Warranty drafts

8.2 Closeout

• Final warranty certificates

• O&M manuals

• As-built drawings or markups

• Load test reports

• Training roster

• Permit and inspection records

ITEM 9 – PERMITS AND INSPECTIONS

Contractor is responsible for obtaining and passing all required permits and inspections. City, county, and utility signoffs must be submitted before final payment.

ITEM 10 – QUALITY ASSURANCE / QUALITY CONTROL

The contractor shall verify that the replacement standby power system is fully compatible with the existing 120/208V, 3-phase, 4-wire building electrical distribution system and correctly sized to carry the existing emergency load. Submission of a bid constitutes acknowledgment that the contractor has verified system compatibility, load requirements, voltage configuration, and phase requirements.

The generator shall be minimum 100 kW standby rating, 3-phase, 120/208V, 60 Hz, WYE-connected, natural gas-fueled, UL 2200 listed, and compliant with NFPA 110. Generator shall be provided with Level 2 sound attenuation not exceeding 71 dB(A) at 23 feet and housed in a wind-rated (minimum 180 MPH) powder-coated aluminum enclosure finished in dark forest green as approved by the COR.

The Automatic Transfer Switch shall be minimum 400 amps, 3-phase, 120/208V, NEMA 3R outdoor enclosure, service-rated where required. The ATS enclosure shall be factory-finished in dark forest green to match the generator enclosure. Field painting of a standard enclosure is not acceptable. Finish shall be manufacturer-applied powder coat or equivalent corrosion-resistant factory finish. Color sample or manufacturer documentation shall be submitted to the COR for approval prior to ordering.

Contractor shall verify existing overcurrent protection devices, feeder conductors, grounding configuration, bonding arrangements, and phase rotation for compatibility with the new generator and ATS. Any modifications required to achieve a fully functional, code-compliant installation shall be included in the contractor’s bid price.

Testing and commissioning are required prior to acceptance and shall include operational transfer testing under load conditions, voltage verification, and confirmation of proper phase rotation. Final acceptance will not occur until successful transfer operation is demonstrated under load and all required documentation has been submitted and approved.

Contractor shall coordinate with the local gas utility to verify that existing gas supply pressure and flow are adequate for full-load generator operation. Submission of a bid constitutes acknowledgment that the contractor has verified gas supply requirements. Any regulator adjustments, meter upgrades, or modifications required to achieve proper full-load operation shall be included in the contractor’s bid price.

ITEM 11 – DELIVERABLES SUMMARY

Submittals required include:

• Generator and ATS specs

• Attenuation data

• Paint approval

• Warranty documents

• O&M manuals

• Test reports

• Training records

• As-builts

ITEM 12 – WARRANTY

Contractor shall provide:

• Minimum one (1) year labor and workmanship warranty covering installation, wiring, terminations, programming, and commissioning.

• Minimum two (2) year manufacturer warranty for the generator for standby applications.

• Manufacturer warranty for the automatic transfer switch (ATS), minimum one (1) year unless greater coverage is provided by the manufacturer.

• Warranty support administered through the contractor for the duration of all warranty periods.

• Contractor shall serve as the single point of contact for warranty coordination.

• Contractor shall respond within seventy-two (72) hours to any documented operational issues reported within thirty (30) calendar days of final acceptance, at no additional cost.

ITEM 13 – SPECIAL CONDITIONS

• Ground mats must be used over historic lawn

• Contractor shall not damage landscaping or historic surfaces

• Any shutdowns must be coordinated 48–72 hours in advance

• Park access must always remain open

• Restoration of any damage is the contractor’s responsibility

ITEM 14 – TECHNICAL PERFORMANCE REQUIREMENTS

This Statement of Work includes performance-based technical requirements for the generator and ATS. All proposed equipment must meet or exceed the specifications outlined in this document.

The generator shall be a commercially manufactured, industrial-grade, natural gas-powered standby generator designed for institutional or commercial applications. Residential-grade standby generators are not acceptable.

The generator shall meet the following minimum requirements:

• Be rated minimum 100 kW standby power at 120/208V, 3-phase, 60 Hz, WYE-connected, 1800 RPM.

• Be UL 2200 listed.

• Be capable of meeting NFPA 110 requirements for standby power systems.

• Comply with EPA stationary emergency emissions requirements (40 CFR 60).

• Provide isochronous frequency regulation and voltage regulation within ±1.0% from no load to full load.

• Include a fully integrated digital control system capable of automatic start/stop, voltage and frequency monitoring, alarm annunciation, fault shutdown, and self-diagnostics.

• Be equipped with a Level 2 or equivalent hospital-grade sound-attenuated enclosure not exceeding 71 dB(A) at 23 feet.

• Include a corrosion-resistant, powder-coated aluminum enclosure rated for wind loads consistent with current building code requirements (minimum 180 MPH).

• Be supported by a manufacturer with a minimum of ten (10) years of experience producing commercial standby generators of similar size and configuration.

• Include a minimum two-year manufacturer warranty for standby applications.

• Be supported by an established regional authorized service network capable of providing warranty service and parts availability.

Appendices are provided for reference and field verification only.

Contractor remains responsible for independent verification of all site conditions.

Appendix A

Photographs

Outside Main Breaker

Outside Breaker Panel

Main Breaker on House Interior Panel

House Interior Panel

House Interior Panel

Appendix B Maps

END OF STATEMENT OF WORK