MACA_344429_SOW_Revised_3-20-2026_0001.pdf

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Mammoth Cave National Park

REPLACE VISITOR CENTER EXTERIOR DOORS

Scope of Work

PMIS #344429

DATED: 3/20/2026

NATIONAL PARK SERVICE

SOUTHEAST REGION

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DIVISION 01 - SHORT FORM GENERAL REQUIREMENTS

PART 1 – GENERAL

ITEM 1 – DESCRIPTION OF WORK

1.1 Background:

This project consists of replacing all exterior public entrance door assemblies at the Mammoth

Cave Visitor Center. The existing door systems have experienced operational failure, air infiltration, hardware degradation, and improper ADA functionality resulting in inefficient pedestrian flow and noncompliant accessibility conditions. The intent of this project is to provide new, durable, code-compliant, and fully functional entrance systems that maintain architectural continuity while improving accessibility, safety, and operational performance.

1.2 The Contractor shall furnish all labor, supervision, materials, equipment and services required to remove and replace existing doors in the Visitor Center.

1.3 Work Covered by the Contract Documents:

Project Location: Mammoth Cave Visitor Center, VC exterior doors. 1 Mammoth Cave Parkway, Mammoth Cave, KY 42259.

Scope of Work:

• Field verification of all door dimensions and conditions.

• Removal and lawful disposal of existing door units, hardware, frames, closers, and associated sealants and thresholds.

• Installation of new aluminum framed, thermally broken double doors with insulated glazing units (IGUs), low-e coated bird-safe fritted safety glass, weather striped and fully gasketed.

• Doors must comply with ANSI A117.1 (ADA accessibility), ASTM E283 (air leakage), ASTM

E330 (structure loading), and ASTM E1886/E1996 (impact resistance, where applicable.)

• Provide wide stile aluminum doors, clear anodized finish, 1" insulated glass units with low-E coating, continuous geared hinges, and thresholds compliant with IBC and ADA.

• Provide twelve (12) automatic door operators total, consisting of six (6) replacement operators and six (6) additional operators to support independent ingress and egress at all three entrances.

• All push/panic bars shall include manual dogging mechanisms operable with a standard 5/32" hex key, compatible with the Park’s existing access procedures. Alternative dogging methods may only be used if pre-approved by the COR and must maintain full code-compliant egress function under IBC and NFPA 101.

• Provide new hardwired ADA push buttons installed at existing locations. Existing push buttons shall be removed and replaced with new units. Wireless systems are not permitted.

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• Each push button shall activate only the door leaf corresponding to the direction of travel.

Cross-activation is not permitted.

• Existing ADA push button locations are embedded within the existing stone construction and shall remain in place. Relocation of push buttons is not permitted.

• Contractor shall modify, reconfigure, and coordinate door operators, wiring, and control logic as required to ensure that each fixed push button activates the correct door leaf corresponding to the intended direction of travel.

• Inability to relocate push buttons shall not relieve the Contractor of the requirement to achieve compliant ADA operation and proper pedestrian flow.

CRITICAL ADA FLOW REQUIREMENT:

• At each entrance, ADA push button activation shall operate a coordinated door pair consisting of one exterior door and the corresponding interior vestibule door aligned with the user’s path of travel.

• Activation of the exterior push button shall open the nearest exterior door leaf and the corresponding interior door leaf to allow continuous forward movement through the vestibule.

• Activation of the interior push button shall open the nearest interior door leaf and the corresponding exterior door leaf to allow continuous exiting movement.

• Doors shall operate in sequence or simultaneously such that users can pass through both door sets without stopping, changing direction, or encountering conflicting door operation.

• Each entrance shall provide independent and intuitive operation for both ingress (entry) and egress (exit).

• Contractor shall account for fixed push button locations and shall design the system accordingly to achieve compliant and intuitive operation.

• Push button activation shall align with the natural pedestrian path of travel and shall not require users to deviate from their approach path.

• System shall be configured such that approaching users activate the correct adjacent door leaf for their direction of travel.

• Final configuration shall be verified and approved by the COR during testing.

• The completed system shall be rejected if push button activation does not correspond to the correct door leaf for the intended direction of travel.

• All hardware shall be heavy-duty commercial grade, including hydraulic closers, mortise locks, lever handles, and continuous hinges.

• Provide rim exit devices with removable mullion. Basis of design: Von Duprin or approved equal.

• All hardware shall be compatible with the Park’s Marshall Best Security (MBS) SFIC 7-pin system without modification.

• Provide surface-mounted door closers. Concealed closers are not permitted.

• Contractor shall replicate and reinstall all existing applied graphics or vinyl decals from removed doors onto the new door assemblies, including but not limited to: hours of operation, 4 | P a g e push/pull instructions, accessibility symbols, or NPS branding. New decals shall match original size, color, and placement unless otherwise directed by the COR.

• Contractor shall coordinate with the COR to ensure all lock hardware is compatible with

Mammoth Cave National Park’s existing Marshall Best Security (MBS) lock and keying system using interchangeable core cylinders keyed to Park’s standards. Cores may be provided by the

Park and installed by Contractor as directed.

• Caulking, insulation, and waterproofing to be installed in accordance with SMACNA and AAMA standards.

• Ensure weather tightness, proper drainage, and air seal for all installed assemblies.

• Testing and balancing of door closures and locking systems.

• Final adjustment, testing, and commissioning of hardware and systems.

• Removal of debris and restoration of surrounding wall finishes where disturbed.

1.4 Period of Performance:

Work to be completed within 180 calendar days from NTP (Notice to Proceed), inclusive of 10 weather days.

ITEM 2. Temporary Services

2.1 The Contractor shall be responsible for providing all necessary temporary utilities, including:

• Power for tools and equipment, if additional power is required beyond existing visitor center infrastructure.

2.2 The Contractor must ensure that all temporary services meet NPS environmental and safety standards.

ITEM 3. Contractor’s Use of Premises

3.1 Because the work is taking place in the Visitor Center, the highest visitation area in the Park, all construction activities shall be carefully scheduled to avoid peak visitor use periods.

3.2 A minimum of two operable public entrances shall be maintained at all times.

3.3 Contractors shall confine operations to the immediate vicinity of work zones and maintain clear egress routes.

3.4 The Park has determined that the targeted construction window will be in the early spring months, with work commencing during evening hours to further minimize impacts to visitors.

3.5 Work shall be conducted in a manner that minimizes disruption to visitor center operations.

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3.6 All work areas must be clearly marked and secured to prevent unauthorized access.

3.7 No equipment, tools, or materials shall be left unattended in public areas.

3.8 The Contractor shall be responsible for daily cleanup and removal of debris from the worksite.

3.9 The Contractor shall be responsible for securing the building to not allow unauthorized access after hours.

3.10 The Contractor shall comply with all Park rules including restrictions on signage, waste, and conduct.

3.11 Public access must not be disrupted. All areas under work shall be appropriately barricaded.

3.12 Typical Visitor Center operating hours are 8:30 AM to 4:30 PM (winter hours) and 8:00 AM to

6:30 PM (summer hours). NPS staff are generally on site by 6:30 AM and may provide building access before opening hours with prior coordination, excluding federal holidays.

3.13 The Contractor shall work with the COR to determine the work hours that best suit the

Contractor’s personnel while also respecting the operating hours of the Mammoth Cave Visitor

Center.

3.14 One service bay and designated exterior staging area (as identified by the COR) may be used for storage.

3.15 All tools and materials must be removed at end of each workday from public-facing spaces.

3.16 Work during weekends, holidays, or outside of standard business hours may be permitted with prior verbal approval from the Contracting Officer's Representative (COR), provided that a minimum of 24 hours' advance notice is given. No work may be conducted outside the hours of normal Visitor Center hours without written approval.

ITEM 4. Commencement, Prosecution, and Completion of Work

4.1 The Contractor shall commence work within 10 business days of receiving the Notice to

Proceed (NTP).

4.2 All work shall be completed within 180 calendar days from the issuance of the NTP.

4.3 The Contractor must integrate all lead times and material coordination into their baseline schedule and inform the Contracting Officer’s Representative if there is an unforeseen issue that would cause a delay in delivery, as soon as possible.

4.4 Work must be executed in phases to maintain continuous building access.

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ITEM 5. Examination of the Site

5.1 Prior to submitting a bid, the Contractor shall visit the site to assess the existing doors and conditions. The Contractor shall:

• Coordinate with the COR to schedule a site visit.

• Verify access routes and work areas.

• Identify any constraints that could impact the project schedule or execution.

• Account for all necessary safety measures and accessibility requirements.

• Contractor is responsible for verifying all dimensions and site conditions.

5.2 Failure to examine the site shall not be grounds for contract modification.

ITEM 6. Abbreviations

6.1 The following abbreviations apply to this contract:

• NPS – National Park Service

• COR – Contracting Officer’s Representative

• OSHA – Occupational Safety and Health Administration

• ABA – Architectural Barriers Act

• ADA – Americans with Disabilities Act

• ANSI – American National Standards Institute

• PPE – Personal Protective Equipment

• MBS – Marshall Best Security

ITEM 7. Accident Prevention and Safety Requirements

7.1 The Contractor shall comply with all applicable OSHA, ANSI, and NPS safety regulations, including:

• OSHA 29 CFR 1926 for construction safety.

• ANSI Z87.1 for eye protection, ANSI Z89.1 for head protection, and ANSI A92 for fall protection if work requires working at heights.

• Conducting a Job Hazard Analysis (JHA) before work begins.

• Providing and enforcing the use of appropriate PPE for all workers.

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• Maintaining an emergency response plan on-site, including first aid and fire prevention procedures.

ITEM 8. Preconstruction Conference

8.1 A preconstruction conference shall be held no later than 5 business days before the start of work. The Contractor, COR, and key personnel shall attend to discuss:

• Project schedule and milestones.

• Subcontractor list.

• Site access and staging areas.

• Safety and accident prevention requirements.

• Coordination with visitor center operations.

8.2 The Contractor shall submit a work plan and safety plan for COR approval before the meeting.

ITEM 9. Submittals

9.1 The Contractor shall submit the following for approval:

• Work Schedule – Within ten (10) business days of the NTP.

• Shop drawings showing dimensions, hardware sets, and frame conditions.

• Product data sheets for door assemblies, hardware, finishes.

• Hardware and lockset submittals shall include documentation verifying compatibility with the

Park’s Marshall Best Security (MBS) lock and keying system, or request for coordination if interchangeable core cylinders will be provided by the Government.

• Finish samples for approval.

• Test certificates for air infiltration, water penetration, and structural load.

• Product data for any modified components

9.2 All submittals shall be transmitted using CM-16 forms and submitted electronically in PDF format.

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ITEM 10. VC Access and Daily Housekeeping Requirements

10.1 General Intent

• The intent of this section is to ensure that the Visitor Center remains open, safe, and accessible to the public during all non-working Contractor hours.

• The National Park Service (NPS) requires that all doors remain secured when construction is not actively underway.

10.2 Daily Housekeeping Requirements

1. At the end of each workday, the Contractor shall clean, organize, and secure all tools, equipment, and materials associated with the work.

2. All walkways, egress routes, and circulation paths around Visitor Center doors shall remain free of debris, tools, cords, materials, or obstructions at all times outside of active work hours.

3. Housekeeping shall be performed to meet all applicable fire code and life safety requirements.

10.3 Visitor Center Access Requirements

1. Two points of entrances within the Visitor Center must remain operational and accessible to visitors during working hours.

2. The Contractor shall coordinate sequencing and housekeeping activities to minimize disruptions and protect the visitor’s experience.

3. If any public entrance doors are temporarily out of service during construction, the Contractor shall cover any illuminated “EXIT” signage above those doors and clearly post a sign stating

“NOT AN EXIT” in compliance with NFPA 101 Life Safety Code and OSHA 1910.37(b)(4).

Signage must be legible, securely fastened, and approved by the COR prior to installation.

4. When any entrance is temporarily closed for construction, the Contractor shall post clear, weather-resistant signage at the point of closure to direct visitors to the nearest accessible entrance. Signage must include the International Symbol of Accessibility where applicable and be compliant with ANSI Z535.2 for public safety signage. Placement and content shall be reviewed by the COR prior to installation.

ITEM 11. Warranties

11.1 Description of Warranty Coverage

• The Contractor shall provide manufacture warranties for all equipment and materials. Warranty documentation must be provided at project closeout.

• The Contractor shall be responsible for repairing or replacing any defective components, or improper installation issues, within the specified warranty periods, at no additional cost to the

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National Park Service. Any warranty work shall be scheduled within 5 business days of written notification from Contracting Officer’s Representative (COR), unless otherwise approved.

• All work performed under this contract shall carry a minimum warranty of two (2) year from the date of final acceptance by the Government.

• At the completion of the project, the Contractor shall provide a written warranty statement, including contact information for technical support and service requests, along with a documented schedule for preventive maintenance recommendations.

ITEM 12. Project Closeout

12.1 Prior to final acceptance, the Contractor shall:

• Remove all equipment, tools, and debris from the site.

• Submit all required submittals and as-built documentation to the COR.

• Restore all equipment access panels, labeling, and enclosures.

12.2 The COR and Contractor’s Project Manager will conduct a final inspection before project acceptance, and Contractor shall correct all punch list items within 10 calendar days.

12.3 PART 2 – EXECUTION

Phase 1 – Verification

• Submit door and hardware submittals for COR review.

• Field verifies all rough openings, frame conditions, power needs and availability.

Phase 2 – Demolition & Prep

• Carefully remove existing doors and frame components, including any embedded or integral locking mechanisms, and all associated sealants.

• Protect adjacent finishes.

• Dispose of materials per federal and state guidelines.

Phase 3 – Installation.

• Install twelve (12) automatic door operators in accordance with ANSI/BHMA A156.19.

• Install new ADA push buttons at existing fixed locations and connect to operators using new or modified wiring as required.

• Configure system such that each push button activates only the door leaf corresponding to the direction of travel.

• Verify independent operation of ingress and egress functions at each entrance.

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• Adjust operator settings, timing, and sequencing to achieve compliant ADA operation.

• Install frames plumb and level using mechanical anchors per manufacturer’s specifications.

• Install door slabs, hinges, closers, and all hardware sets.

• Wire and connect ADA push button and openers.

• Adjust for smooth operation and ensure ADA compliance.

• Apply sealants, thresholds, and gaskets to prevent water and air infiltration. Verify installed doors meet ASTM E283, E330, and E1886/E1996 standards through documented performance testing or certification from manufacture.

Phase 4 – Final Testing, Cleaning & Punch List

• Provide rim exit devices with removable mullion. Basis of design: Von Duprin or approved equal.

• All hardware shall be compatible with the Park’s Marshall Best Security (MBS) SFIC 7-pin system without modification.

• Perform ADA compliance testing in accordance with ANSI A117.1 and ADAAG 404.

• Cycle test each door a minimum of ten (10) times to verify proper operation.

• Simulate bidirectional pedestrian traffic to confirm proper flow and door activation.

• Demonstrate correct door operation and traffic flow to the COR.

• Provide written certification that all systems comply with ADA, ANSI, and NFPA 101 requirements.

• Provide surface-mounted door closers. Concealed closers are not permitted.

• Function tests all doors for latch, closure, and electronic function.

• Coordinate access testing with COR.

• Clean all glazing, frames, and adjacent surfaces.

• Submit photo documentation and warranty binders.

• Punch list resolution required.

• Provide warranty contact info in writing.

• Maintenance recommendations from the manufacturer for long-term care.

• Perform final walkthrough with COR.

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PART 3 – PICTURES

(1) Picture of two sets of double doors at the Mammoth Cave Visitor Center. This is one of three public entrances. The ADA push button is located on the right post; however, the far-left door opens.

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(2) Picture of bottom latch separating from the door, indicating hardware failure.

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(3) Picture of a visible gap between the exterior double doors.

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(4) Picture of the Visitor Center’s east entrance doors.

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(5) Picture of the Visitor Center’s south entrance doors.