Attachment C- Scope of Work.pdf

MARK TWAIN NATIONAL FOREST MARCH 2024

WILD BOAR HOLLOW

BOAT DOCK REPLACEMENT

PART 1 - GENERAL

1.1 SCOPE OF WORK

The Work of Project is defined by the Contract Documents and consists of the following:

1. Detach existing dock from stiff arm and ramp.

2. Remove and haul of existing dock for contractor salvage.

3. Furnish and install new floating ADA accessible 12'x24' courtesy boat dock. Attach new dock to existing stiff arm and dock ramp. All products shall be delivered in a new/unused condition with no damages to the Mark Twain National Forest project site.

4. New dock shall meet requirements in specifications and attach to the requirements met by the specifications of the existing stiff arm and ramp.

5. Information in specifications regarding headwalls, stiff arm, and ramp are for reference.

1.2 PROJECT INFORMATION

1. Project Identification: Wild Boar Hollow Boat Dock Replacement

a. Project Location: The project is located in Iron County Missouri, at Council Bluff Recreation Area, Lake Boat Ramp, in the Mark Twain National Forest, Potosi-Fredericktown Ranger District. Lat: 37.731531, Long: -90.930633

2. Owner: Government or Owner refers to the USDA Forest Service

a. Owner's Representative: The Federal Contracting Officer (CO) and his/her designated representative(s), as named in writing. Contracting Officer (CO) refers to the person assigned by the USDA Forest Service to administer the Contract. Soon after Contract award, the Contracting Officer will designate a Contracting Officers Representative (COR).

1.3 BASIS FOR PAYMENT

Lump sum after final acceptance of completed work.

1.4 WORK HOURS

Regular work hours will be from 8:00 am - 4:30 pm Monday through Friday, excluding federal holidays. Any proposed changes to the work hours must be approved by the recreation area manager.

1.5 COMPLETION TIME

Work shall be fully completed 90 days after award of contract.

1.6 SAFETY REQUIREMENTS

The contractor shall comply with all State and Federal safety regulations during the performance of the work.

1.7 WEATHER LIMITATIONS

Work shall not be done during adverse weather conditions that would cause damage to Government Property or risk the safety of contract personnel. Lake elevation will be critical during the construction. During construction, if the lake elevation becomes too high for work to safely be accomplished, project management or the contracting officer's representative (COR) will notify the contractor in writing advising them of forecasted lake elevation and will request a revised work schedule.

1.8 SUBMITTALS

After contract award but prior to any construction, to ensure that all design load conditions and other criteria are met, the following information shall be submitted in a technical proposal for review by the government prior to construction.

1. Layout drawings of the dock and bridge to be furnished under this contract.

2. Detail drawings and sectional drawings of sufficient scale for clarity of the following items:

a. Floating dock

b. Bridges/ramp

c. Dead load and design load freeboard

d. Anchorage system and associated connections

e. Flotation system Connections

All drawings shall be accurately drawn to scale with complete dimensions. Drawings shall indicate the relevant size of all structural members, type of material, finish, thickness, gauge, and other pertinent information for the compete evaluation of the system. All relative design information, including dead load and design load freeboard, the types, sizes and gauges of structural members, design stresses and general notes shall be clearly shown on the drawings.

The drawings shall include a statement certifying compliance to all specifications and standards quoted herein.

Shop drawings shall be submitted to the Owner for approval prior to fabrication of the units.

1.9 PREWORK CONFERENCE

A prework conference will be held with the Recreation Area Manager and contractor prior to the commencement of any work. The contractor's responsible person and necessary administrative staff will be required to attend this meeting. Procedures for proper invoicing and payment, schedule, etc., will be covered at this time.

1.10 ENVIRONMENTAL CLEANUP

The contractor shall maintain a clean work area at all times. The contractor shall be responsible for the protection of the environment and will be required to restore all damages subject to the approval of the contracting officer. The contractor shall remove and dispose of all debris off Government property in a state approved disposal site unless specified otherwise. The contractor will be required to comply with all Federal and State environmental requirements.

1.11 WARRANTY

The contractor shall warrant to the Government the dock and bridge gangway installation to be free from defects in material and workmanship under normal use and service. At any time within one year from the date of contract acceptance of work by the Government, the contractor will furnish and install, without cost to the Government, any part, assembly or portion thereof which examination shall disclose to be defective.

The warranty period shall be for a period of one year from the date on which the completed work is turned over to and accepted by the Government.

Flotation - Polyethylene floats - Shall have a minimum fifteen (15) year warranty, prorated last 5 years.

1.12 MANUFACTURER QUALIFICATIONS

Only manufacturers or coordinating suppliers who have a minimum of ten (10) years of experience in floating structure, dock, and/or marina design, construction, and installation will be accepted to bid on this project.

The complete system shall be designed and stamped by a Professional Engineer registered in the state of Missouri.

PART 2 - SCOPE OF WORK

2.1 DOCK AND RAMP

A site visit is strongly encouraged for the contractor to ensure working conditions, verify all square footages, lengths, and dimensions. It is the contractor's responsibility to verify and ensure all material calculations in order to meet this specification.

The contractor shall furnish all labor, materials, tools, equipment, and incidentals necessary to complete the removal of exiting dock, furnishing and installation of a new floating dock complete with deck, frames, floats, handrails, bumpering, bridges, and shore column shown on the plans and according to the specifications.

The contractor will be providing:

1. Removing and disposing of existing 56’ long by 6’ wide dock and hardware.

2. Furnishing and installing a floating ADA accessible roughly 12'x24' dock with stiff-arm anchorage.

a. Designing and installing a concrete shore column/headwall for the stiff-arm to be attached to with associated connections.

3. Furnishing and installing an ADA accessible ramp to connect the dock to land and dock.

a. Ramp shall be attached to the existing head wall (its face measures roughly 10’- 10” wide by 4’-2” tall) with associated connections designed by contractor to be approved by COR.

Prior to installation, the contractor shall remove all rocks, debris, etc. that might conflict with the bridge, floats and anchors.

PART 3 - EXECUTION OF WORK

3.1 DESIGN REQUIREMENTS

VERTICAL LOADS

A. Dead loads shall consist of the entire weight of the floating structure, including bridge, handrails and other appurtenances.

B. Deck surface and structural frame live load shall be equal to 50 PSF applied to the full surface area of the deck.

C. Substructure designed (Ultimate Strength) to support full live load across a thirty (30 ft.

span. (Calculated to be maximum wave, crest to crest, on most inland lakes.)

D. Bridges, ramps and walkways designed to support 50 PSF. Bridge handrails shall be designed for a 200 pound load applied in any direction and at any point along the handrail.

E. Flotation deck shall be designed to support the dead load plus 30 PSF live load applied to the full surface area of the courtesy dock. Flotation shall be adequate to maintain a uniform freeboard over the entire deck.

F. Adjustable bridge float and additional flotation on the shore side of the dock shall be designed to support the dead load of 40' of the 80' bridge plus live load.

HORIZONTAL LOADS

A. A uniform horizontal wind loading from any direction shall be calculated as 90 MPH calculated on all projected surfaces.

3.2 PRODUCTS

1. STRUCTURAL STEEL FRAMES

a. The structural framing for the dock, the walkway ramp, the railings and the anchoring system shall be fabricated from plate, bar, pipe and structural steel shapes conforming to ASTM Designation A-36. All units shall be hot-dipped galvanized after fabrication, in accordance with ASTM A-123, minimum coating of 2 oz. per square foot. All square tubing shall be 11 gauge unless otherwise indicated on the plans. All bolts shall be Grade 5 unless otherwise specified.

2. FLOTATION

Polyethylene Encased Floats

Flotation units shall be made of expanded modified polystyrene billets of 1.1 lb. per cu.

Ft. density, 100% virgin material. 15 year warranty. FDA title 21 compliance.

The flotation units shall be encased in high density polyethylene shells consistent with the following standards:

Minimum Thickness .125 inches Molding Roto Molding Minimum density .95 gms/cc ASTM D1505-68

Environmental Stress Cracking F-50 800 hr. ASTM D1693-70

Tensile strength at yield

3600 psi ASTM D638

Flexural modulus 175,000 psi ASTM #790

Polyethylene shells shall be one-piece roto-molded units. Flotation units to be securely attached to bottom of substructure frame.

Flotation units shall be designed to maintain their desired buoyancy and freeboard even if structurally damaged (i.e. broken in half). Connections of flotation units shall be designed so that the floating dock acts as a unit, so that one unit does not deflect without adjacent units deflecting and no vertical slip occurs between units when deflecting.

3. DECK MATERIAL

The dock deck and bridge deck material shall consist marine grade non-slip/antiskid PVC boards per drawing specifications. Colors and textures to be approved by COR.

4. BUMPERING/RUB-RAIL

Wood polymer composite, low maintenance recycled wood and plastic side wood attached to perimeter of dock per drawings specifications. Certified Green environmentally friendly material made from at least 90% recycled material. Color to match decking.

5. ACCESSORIES

Cleats shall be galvanized steel, minimum length of 8 inches and shall be bolted to the structural frame.

6. ANCHORAGE

Anchorage shall consist of one ~23' long stiff-arm attached to a headwall/shore column.

Include 5/8" galvanized cross cables with turnbuckles and properly tensioned.

Provide system and design for headwall/shore column that will be attached to stiff-arm in technical proposal for approval.

7. GALVANIZING

All welded frames, bridges, connectors, shore columns, and trusses shall be hot-dip galvanized after fabrication, in accordance with applicable specifications. The steel frames shall be designed for field connection with high strength galvanized bolts.

Field welding of galvanized metals will not be allowed except on minor corrections above water level, which will be treated with cold galvanizing process.

8. FABRICATION

All deck and railing modular units shall be shop welded as shown on the drawings.

Welding shall conform to the requirements of the American Welding Society. Welds shall be a solid and homogenous part of the metals joined and shall be free from pits or scale, and shall be full areas and length required to develop the required strength for the intended use.

All connections between modular deck sections shall occur below the deck level. All bolts, nuts and washers shall be sat square with connecting structural members and drawn tight. Lock washers or other devices shall be used to prevent nuts from loosening after properly tightened. All fasteners shall be galvanized.

If any drilling or cutting of steel is necessary after galvanizing, the exposed areas shall be painted with a high zinc dust content paint. All welds over galvanized material shall be thoroughly cleaned and coated with two coats cold galvanizing compound.

9. WORKMANSHIP

Workmanship shall be first class in all respects and any materials not representing a finished and acceptable product will be rejected.

All finished steel members shall be free from twists, bends, distortions, and open joints.

All steel construction shall be free of sharp edges and burrs; ends of exposed steel members shall be rounded or beveled, and all coping and mitering shall be done with care. Projecting materials and burrs, which would prevent bearing of the various members on each other, shall be removed.

4.0 DELIVERY

US Forest Service Mark Twain National Forest Council Bluff Recreation Area– Wild Boar Hollow Boat Ramp Area Iron, County Missouri

TECHNICAL EXHIBITS (EXISTING DOCK)

4.0 DELIVERY

Tech Exhibits