A04_Statement_of_Work_-_FOFR_Boardwalk_Amended_SOW_(8-19-2026)_0003.pdf

FORT FREDERICA NATIONAL MONUMENT

BOARDWALK REHABILITATION AND REPLACEMENT

Scope of Work (SOW)

National Park Service (NPS)

1.0 Project Background and Justification

Fort Frederica National Monument proposes replacement of the existing wood boardwalk to address deterioration, improve visitor safety, and maintain an accessible route over the dry moat at the historic townsite boundary.

Replacement provides the NPS an opportunity to improve life-safety features and construction practices consistent with current International Building Code requirements, including loading capacity and guardrail height, while maintaining the boardwalk's existing function and alignment.

2.0 Scope

The Contractor shall provide all labor, materials, equipment, and transportation necessary to demolish and remove the existing wood boardwalk and construct a new wood boardwalk in its place, including concrete supports, structural framing, decking, and guardrails. Work includes maintaining a continuous accessible route, protecting adjacent resources, and restoring disturbed areas.

3.0 Tasks

3.1 Demolition

1. Contractor shall demolish and remove the existing boardwalk in its entirety, including decking, framing, posts, guardrails, concrete encasements, and associated components.

2. Demolition shall be controlled to prevent damage to the dry moat and surrounding landscape.

3. Existing post voids shall remain available for reuse where practicable to limit new ground disturbance.

4. Contractor shall maintain site control and visitor and worker safety throughout demolition.

3.2 Elevated Boardwalk Footings and Post Anchorage

1. Elevated boardwalk vertical supports shall bear on reinforced precast concrete footings. Footings shall be manufactured off site using minimum 4,000 psi concrete and reinforced with welded wire mesh (WWM).

2. Precast footings shall include threaded J-bolt anchors cast into the concrete during the precasting process.

J-bolts shall be positioned and wet set to receive the specified pre-manufactured post bases.

3. Post bases shall be compatible with the cast-in-place J-bolt anchors and sized for the specified vertical support.

4. Post bases and anchors shall be centered and aligned on the footing to provide proper load transfer.

3.3 Ground Contact Boardwalk Construction

1. Ground-contact boardwalk segments shall use nominal 4x4 preservative-treated posts spaced at no more than 8 feet on center and fully embedded in concrete to provide lateral support and prevent movement.

2. Existing post voids shall be reused where practicable. Voids may be widened as necessary, not to exceed 12 inches in diameter, to allow concrete embedment.

3. Each post line shall support two (2) nominal 2x6 beams spanning the 8-foot boardwalk width. Beams shall remain in ground contact and shall be attached to each post with two (2) through-bolts.

4. Joists shall be nominal 2x8 lumber, bear a minimum of 1-1/2 inches on the 2x6 beams, and be spaced at no more than 16 inches on center. Joists shall be laid out from both sides with the odd space located at the center of the boardwalk.

5. Provide joist blocking at beam bearing locations.

3.4 Elevated Boardwalk Construction

1. Supporting beams shall consist of double nominal 2x8 preservative-treated members.

2. Interior bearing posts shall be spaced at no more than 4 feet on center. Perimeter posts shall be spaced at no more than 8 feet on center. Posts supporting beams shall be minimum nominal 6x6 preservative-treated lumber.

3. Posts shall be notched 7-1/4 inches high by 3 inches deep to provide full bearing for double 2x8 beams.

4. Beam-to-post connections shall use not less than two (2) 1/2-inch diameter Type 316 stainless steel through-bolts with Type 316 stainless steel washers and nuts at each connection.

5. Provide blocking joist blocking at all bearing beam locations. .

3.5 Decking

1. Decking shall be nominal 5/4 x 6 preservative-treated lumber installed perpendicular to the joists with a 3- 1/2-inch overhang at each side of the boardwalk.

2. Deck boards shall be fastened with two (2) 3-inch coated deck screws at each joist and installed to provide a smooth, continuous accessible walking surface.

3.6 Guardrail

1. Contractor shall install a two-rail guardrail along the full length of the boardwalk. Guardrail height shall be 42 inches above the finished walking surface.

2. Guardrail posts shall be nominal 4x4 at ground-contact segments and nominal 6x6 at elevated segments.

3. The upper rail shall be nominal 2x4 lumber installed flush with the top of the posts. The lower rail shall be nominal 2x4 lumber installed 14-1/2 inches below the upper rail.

4. Top caps shall be nominal 2x6 lumber. Top caps connecting 6x6 posts shall be nominal 2x lumber ripped to

8 inches wide.

5. Guardrail components shall be securely fastened to provide a rigid assembly.

6. Contractor shall mount 2 waysides at the elevated section of boardwalk. Location to be determined on site.

See Appendix B for mounting details.

4.0 Requirements

4.1 Scope of Work Requirements

1. Lumber on or in contact with soil, or embedded in concrete, shall be preservative-treated and rated for ground contact. All other lumber shall be preservative treated for exterior use.

2. Through-bolts, washers, and nuts shall be Type 316 stainless steel. Other fasteners, connectors, and hardware shall be corrosion-resistant and compatible with preservative-treated lumber.

3. All cuts, notches, and field modifications to treated lumber shall be field-treated with a compatible preservative.

4. Contractor shall verify dimensions, layout, and field conditions before construction. Bid Sketches in Appendix A communicate the Government's minimum design intent and are not construction drawings.

5. Work shall follow best practices for construction in a historic site and shall minimize unnecessary ground disturbance.

6. Contractor shall maintain site control and visitor and worker safety throughout the Work.

4.2 Option 1 Requirements

1. The temporary accessible route shall consist of a modular accessible ramp or walkway system suitable for public use.

2. Installation and removal of the temporary accessible route shall not require new borings or other ground disturbance greater than 6 inches below existing grade.

3. The Contractor shall provide all components, supports, landings, transitions, guardrails, and other appurtenances required to provide a complete temporary accessible route.

4. The temporary accessible route shall remain in place and available for visitor use until the permanent boardwalk is available for use, unless otherwise directed by the COR.

5. Contractor shall remove the temporary accessible route upon completion and restore disturbed surfaces to pre-construction condition.

5.0 Deliverables

1. Material submittals for lumber, concrete, fasteners, connectors, post bases, anchors, and other major components shall be provided for Government review prior to installation.

2. Contractor shall provide a site-specific safety plan addressing site control, visitor safety, worker safety, demolition, excavation, concrete placement, structural framing, material handling, and use of wheeled or mechanized equipment.

3. Activity Hazard Analyses (AHAs) shall be provided for demolition, excavation and concrete placement, structural framing, and use of wheeled or mechanized equipment.

4. Contractor shall provide a one (1) year workmanship warranty beginning at final Government acceptance.

6.0 Resource Protection

6.1 Cultural Resources

1. The boardwalk is a non-historic structure located within a culturally significant maintained landscape. Its alignment conveys the location of the original entry bridge into the townsite and shall be preserved.

2. Construction access, staging, and material storage shall be confined to previously disturbed areas and areas immediately adjacent to the boardwalk to the maximum extent practicable.

3. Ground disturbance shall remain within the existing boardwalk footprint and the approved Area of Potential Effect, extending 10 feet outside the existing boardwalk perimeter.

Ground Disturbance, including all excavations and borings, shall be limited to the existing boardwalk footprint. No ground disturbance shall take place outside the existing boardwalk perimeter.

Construction activities outside of the existing boardwalk footprint, including material staging, cutting, and other construction support activities, shall be limited to the area extending up to 15’ north of the boardwalk perimeter. Construction activities shall not occur south of the existing boardwalk perimeter.

4. New borings shall be limited to those required for structural support and shall not exceed 12 inches in diameter. Up to 20 additional 12-inch diameter borings may be required.

5. NPS will provide archeological monitoring. Contractor shall notify the COR at least 72 hours before performing new borings.

6. If cultural materials, archeological resources, or human remains are encountered, Contractor shall stop work in the immediate area and notify the Contracting Officer. Work shall resume only when directed.

7. All wheeled equipment operated within the historic townsite during performance of the Work shall be equipped with turf tires.

6.2 Natural Resources

1. Disturbed turf or ground surfaces shall be restored to pre-construction condition, including grading to existing contours, seeding, and stabilization until vegetation is established.

2. Contractor shall not disturb, harass, or otherwise interfere with wildlife and shall avoid impacts to wildlife habitat.

3. Contractor shall stage, contain, and remove all demolition and construction debris from the site. All debris shall become the property of the Contractor and shall be disposed of outside of the Park boundary in accordance with Local, State, and Federal regulations.

7.0 Options

Option 1 – Temporary Accessible Route

1. Contractor shall provide a temporary accessible route over the moat for use during demolition and construction of the new boardwalk. The temporary accessible route shall span approximately 53 feet 6 inches and provide visitor access into the townsite without requiring visitors to traverse the earthen slopes of the moat.

2. The temporary accessible route shall be located approximately 20 feet north of the existing boardwalk.

3. Contractor shall include all materials, delivery, installation, maintenance, removal, and site restoration associated with the temporary accessible route in the Option 1 price.

APPENDIX A - BID SKETCHES

The following sketches are provided to communicate the Government's minimum design intent. They are not construction drawings. Contractor shall verify all dimensions and field conditions prior to construction.

Appendix A-1 - Ground Contact Walkway Detail

Appendix A-2 - Ground Contact Section

Appendix A-3 - Elevated Boardwalk Section

APPENDIX B

1 1 Each

2 1 Each

3 1 Each

4 1 Each

5 1 Each

6 2 Each

7 1 Each

8 1 Each

9 1 Each

10 1 Each

10 1 Each

TOTAL PRICE FOR ALL OPTIONS BASE PRICE (Contract Line Item Number 9)-----------

TOTAL BASE PRICE (Contract Line Item Number 1 through 7-----------------------------

Provide temporary townsite access spanning the Moat

Total Price

Demolition of Existing

Boardwalk

Concrete Footing Placement

Decking

Structural Framing

Guardrail

General Conditions

Profit

Overhead

Install Waysides

Contract Price Schedule National Park Service (NPS)

Solicitation : TBD

Park: FOFR

PMIS Number: 327467

Developed Area:

Project Title: FOFR Moat Boardwalk

Notice: Offerors are required to submit, a minimum, an offer that conforms to the solicitation documents with pricing for Base line items and all option line items. Failure to do so may render the proposal unacceptable. On lump-sum line items, provide the total price only. For all unit-priced line items, provide the unit price and the extended total price. If no specific line item exists for a portion of the work, include the costs in a related item. In case of error in calculation of extended prices, the unit price governs. In case of error in summation, the total of the corrected amounts govern. Round totals and extended prices to whole dollars.

Contract

Line Item

Number

(CLIN)

Unit of

Measure Contract Line Item (CLI) Title Quantity Unit Price