Attachment 2 - Kootenai Boat Dock Replacement SOW.pdf

US Department of Agriculture (USDA)

Statement of Work

Contents Project

General Information

1.0 Scope of Work

1.1 McGregor Lake Floating Boat Dock (Base)

1.2 Rexford Bench Floating Boat Dock (Option)

2.0 Locations

3.0 Timelines, Meetings, and Scope

Contractor Requirements

4.0 Technical Requirements

5.0 Government Furnished

Attachment

Project GAOA FY23 Boat Launches and Dock Replacements: McGregor Lake and Rexford Boat Launch

General Information

1.0 Scope of Work

The Kootenai National Forest is seeking to replace two old floating docks at two separate recreation sites. The docks are used as boarding floats at boat launches and are important components of providing public lake access. Both docks are to be operated on the sites’ concrete boat ramps and will be adjusted as needed seasonally. However, each dock will incorporate a different design to meet this function. The McGregor Lake boat dock is the base item in the contract with the Rexford Bench boat dock to be awarded as an option item.

1.1 McGregor Lake Floating Boat Dock (Base)

The Kootenai National Forest is seeking to replace the old and damaged floating dock at the McGregor Campground Boat Launch with a high-quality floating dock that meets ADA Accessibility Standards for boating facilities. The current plastic dock is warped, unstable, and is in need of replacement. It is also difficult to maneuver and position on the boat ramp as it lacks wheels or other mobility features. The site is on the western end of this 1,500-acre lake and is subject to moderate to high winds and natural wave action. The lake does not experience large fluctuations of water level, but it does change moderately between the seasons. The dock will serve as a boarding float for visitors using the boat launch. The current concrete boat launch ramp is 30’ wide by 60’ long.

The new dock shall consist of three (3) 8’x20’ steel-framed floating dock sections hinged with transition plates to cover the hinge gaps. Each section to have four (4) heavy duty steel legs with caster wheels of sufficient size, spacing and load capacity to allow the dock to be rolled up and down the boat ramp without damaging the floats or the ramp. The float unit closest to shore shall have the following attachments facing the head of the ramp: attachments for an aluminum ramp or gangway, an anchor point for a shoreside guy-wire anchor, and tow bar brackets and removable tow bar (trailer tongue) so that the dock assembly can be pushed and pulled into and out of the water with the hitch of ½ ton truck without damaging the dock. Aluminum gangway or ramp shall be able to be easily removed or folded up onto the dock during seasonal dock installation and removal and have wheels on the ramp-head end.

The replacement dock shall be manufactured with galvanized steel framing, roto-molded EPS foam floats, galvanized steel or marine-grade aluminum bull rails, vinyl bumpering, composite decking, and an ADA compliant aluminum gangway or ramp (length to be determined by the ADA maximum slope requirement). Contractor shall provide an anchorage system in the form of two (2) deadman anchors and galvanized 3/8” steel chain to be installed by the contractor. Each float unit is to have two (2) deck hatches with chain retainers.

Dock to be anchored by two deadman, cross chained on the lakeward side of the dock and a guy-wire that attaches from the ramp-head float to boat ramp concrete. The contractor shall provide and install the chains and deadmen. Cabling and ramp attachment points are the responsibility of the Forest Service.

See attached figure 5 for existing site conditions.

1.2 Rexford Bench Floating Boat Dock (Option)

The Kootenai National Forest is seeking to replace the old and damaged holding dock at the Rexford Boat Launch with a high-quality floating dock assembly that meets ADA Accessibility Standards for boating facilities. The site is on a large reservoir which is subject to high winds and substantial natural and boat-caused wave action. The reservoir experiences large fluctuations of water level throughout the year and the dock will be rolled up and down the boat ramp to match water levels and should be designed accordingly.

The Forest has multiple docks on the lake that are specifically designed to meet the challenges faced by operating a boat launch with boarding docks on a lake where the water level fluctuates as much as 100 feet between April and August. These docks have large metal and concrete cylinders for wheels (The lakeward cylinders are attached to arms that move up and down as the dock is moved farther in or out of the water) that allow the dock to be rolled up and down the boat launch with a ½ ton pick-up while also providing enough weight and stability to anchor the dock in place and prevent drift while in use. The new Rexford dock is to be of the same design as the existing docks.

The new dock shall consist of the following sections (See attached figures)

Two (2) 6’x20’ floating sections at the end of the dock that extend out into the water. Attached rollers and legs that adjust to the water depth as the dock is rolled up and down the concrete boat ramp. Legs to extend to a depth of 7’. Each section to have two robust steel arms with caster wheels on the ramp-head side. (See fig. 1. and 2).

A 12’ span of steel trusses and decking that attaches the large steel roller and gangway assembly to the floats. (See fig. 3)

A 7’-8” section of steel trusses with decking attached to a large roller assembly and brake mechanism. At the ramp head end of this section, there shall be two chain attachment points (one on either side) so that the dock assembly can be moved by a ½ ton truck without damaging the dock (See fig. 4).

An aluminum gangway that connects to the roller assembly and provides ADA access from the boat ramp onto the boat dock. Length to be determined by the ADA maximum slope requirement.

Attachment points so the dock can be hitched or chained to a pickup during moving.

The replacement dock shall be manufactured with galvanized steel framing, roto-molded EPS foam floats, composite decking, vinyl bumpering, galvanized steel or marine-grade aluminum bull rails, chain attachment points for moving the dock, and an ADA compliant aluminum gangway or ramp

See attached figures 1-4 for general dock layout and pictures of the existing docks.

2.0 Locations

2.1 McGregor Lake

The McGregor Lake Campground and the associated boat launch is located 54 miles southeast of Libby, Montana. Or 36 miles west of Kalispell, Montana. The campground is on the southside of U.S. Hwy 2 and accesses the far western end of McGregor Lake. The Lake can experience high winds and the lake level can fluctuate as much as 10 feet. The campground entrance road and road to the boat launch area is wide and paved. See the attached maps for more detailed location information.

2.2 Rexford Bench

The Rexford Boat Ramp is located 8 miles west of Eureka, MT. The boat ramp is located on the northern end of the campground and on the eastern shore of Lake Koocanusa. The campground entrance road and road to the boat ramp area are wide and paved. See the attached maps for more detailed location information.

3.0 Timelines, Meetings, and Scope

3.1 Construction Magnitude

Between $25,00 and $100,000

3.2 Site Visit

No site visit is scheduled. Questions regarding the project may be directed to Ken Wickward at kenneth.wickward@usda.gov.

Additional Points of Contact are o Laura Jungst (laura.jungst@usda.gov) o Zach Windsor (zachariah.windsor@usda.gov

3.3 Pre-Bid Conference

No pre-bib conference is scheduled

3.4 Start Work

Work may begin within 14 days after receiving the Notice to Proceed.

3.5 Period of Performance

All work shall be completed between May 1, 2024 and October 31, 2025

Contractor Requirements

4.0 Technical Requirements

The contractor is responsible for all permitting requirements related to this project and traffic control for truck, crane equipment and any delivery vehicle site access required for installation.

The Contractor shall furnish all labor, transportation, equipment, tools, supervision, materials, and supplies necessary to design, furnish, deliver, and install the new floating docks complete with deck, frames, floats, gangway, bumpering, and anchorage according to the following specifications.

4.1 General

For all work on Forest Service land, leave the area in a safe, drivable condition, at the end of the day.

Work shall not be completed on weekends without prior permission granted by the USFS.

Park all construction equipment only in locations designated by the CO. Parking locations will be designated within ¼ mile of the project work sites.

4.2 Dock Floats

Dock floats shall be constructed with the following.

Ace -Roto Molded floatation drums or CO approved equivalent.

Floatation units shall be filled with Expanded Polystyrene (EPS) constructed out of 100% virgin material.

Encased walls with a minimum thickness of .125 inches Floats to meet ASTM D1998-06 standards for construction and impact resistance.

Float drums shall be covered by a 15-year warranty.

Floats shall have adequate floatation to meet the live and deadload specifications.

4.3 Steel Frame

Contractor shall construct the steel dock frames to the following specifications:

The structural framing for the dock, support legs, and 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.

Steel frame and legs to be of robust construction so the legs on the docks do not bend or break as the dock is moved up and down the grooved concrete ramp.

All bolts shall be Grade 5 unless otherwise specified.

4.3 Load Requirements

Contractor shall construct the docks to adhere to the following load requirements.

Under deadload the dock shall float level.

Live load capacity of the dock shall be 30 pounds per square foot.

Ensure that adequate flotation is provided to support the dead and live loads of both the boarding float and the gangway.

Under dead load conditions the dock’s freeboard shall not exceed 24”. And under combined uniform live load and dead load, the minimum freeboard shall be 10”.

o Desired freeboard under dead load is 20.5 “

Single point loads limits to be 400 lbs.

4.3 Anchorage

The contractor shall design and provide the necessary anchorage so that each dock is suitably anchored and free of drift.

McGregor:

o For anchoring to the lake bottom the contractor is limited to galvanized chain attached to a suitable clean weight such as solid clean concrete deadman.

Deadmen to be appropriately weighted for the amount of floatation in the dock system.

o Galvanized chain size to be 3/8” o Contractor is responsible for furnishing, delivering, and installing the chains and deadman anchors.

o Each floating dock section to include a hatch and chain retainer on each side of the float.

o Ramp-head dock section to include an attachment for a guy-wire anchor.

Rexford Bench o Large, weighted tubular wheels on both the ramp-head and ramp-toe sides of the dock. The large cylindrical wheels shall create enough anchorage to prevent the dock from drifting.

o Each 20’ floating section to have a concrete cylinder and adjusting arm to provide adequate anchorage (see attached figures).

o Include a steel chock block to prevent the upper wheel from moving during dock use and dry storage.

4.4 Decking

The contractor shall adhere to the following decking specifications:

Decking to be made of composite material such as MoistureShield or Trex that has a wood-like aesthetic.

Decking material to withstand sun, moisture, and heavy use without warping, splintering, fading, or staining.

Decking should perform well in marine environments, be durable and have a service life of not less than 15 years.

Decking shall meet all ADA requirements including gaps between decking members and level heights between decking members.

4.4 Bull Rail

Docks to manufacture with the following bull rail specifications:

Dock to be equipped with bull rails (wheelchair curbing) that run along the perimeter of the dock with a minimum interior clearance of 60”.

Bull rail shall be elevated off of the surface of the dock so as to provide tie-off points for mooring boats.

o This eliminates the need for dock cleats which can be a tripping hazard.

Bull rails to be constructed out of marine-grade aluminum or galvanized steel.

Per ADA requirements, the bull rail to have a maximum height of 4” and a maximum width of 2”.

4.6 Rub Rail

Both docks shall have:

Vinyl rub rail that runs along the entire perimeter of the floating dock sections that protects boats and the dock against rubbing and damage.

Rub rail to be made of a high-quality vinyl with UV inhibitors to prevent yellowing and deterioration and with fungicide to prevent mold.

4.7 Gangway

Gangway components shall adhere to the following:

Gangways and dock access ramps shall have a clear interior width of no less than 36” and handrails that meet ADA standards.

Transition plates on either end of the gangway for ADA accessibility. Plates shall provide a smooth and even transition between the gangway and shore, and between the gangway the floating dock.

Constructed out of marine grade aluminum.

Supports a uniform live load of 50 pounds per square foot.

Gangway to adhere to ADA slope requirements of no more than 1:12 (8.3%).

Gangway decks shall have a durable non-skid surface to provide traction.

4.7 Caster Wheels:

Caster wheels used on the dock shall adhere to the following:

Caster wheels shall be marine grade plate casters that can be unbolted and replaced in the future.

Minimum load capacity rating to be 1200 lbs. per wheel.

Constructed with corrosion resistant materials.

4.7 ADA Accessibility

Contractor shall adhere to all ADA Requirements for boating facilities:

https://www.access-board.gov/ada/guides/chapter-10-boating-facilities/

5.0 Government Furnished

No government property to be furnished.

Attachment Site locations for delivery.

Figure 1: General Drawing – New Koocanusa Marina Boat Ramp dock

Figure 2: Example of float section with rollers and adjusting legs

Figure 4. Example of roller assembly and dock layout. Note that the 5-foot aluminum gangway is not pictured.

Figure 3: Example of bridge section that connects between the floats and roller assembly

Figure 5. Existing site conditions at McGregor Lake