B09_AMEND2_Attch1_SOW_HAV_boat_ramp_Revised_0002.pdf

140FC125Q0008

STATEMENT OF WORK

Havasu National Wildlife Refuge (NWR)

Boat Ramp Construction Lake Havasu National Wildlife Refuge Complex

Topock, Arizona

REVISED

February 2025

BACKGROUND

This Statement of Work summarizes the justification for a construction contract to replace an existing boat ramp with a new concrete boat ramp at a recreation area that provides public vessel access in the Topock Marsh Impoundment at Havasu NWR.

DESCRIPTION OF PROJECT NEEDS

A contracted vendor will need to remove a boat ramp consisting of concrete and rebar. The ramp is located at 5-mile Landing Recreation Area just north of Golden Shores, AZ on County Road 1. The ramp measures 70-feet long x 16-feet wide x 1-foot thick. The removed concrete is to be stockpiled on site for refuge staff disposal or to utilize as rip-raff within the recreational area.

The ramp is to be replaced with a boat ramp that is 50’ long and 16’ wide and a 20’ long x 16’ wide approach apron. The underlying ground must be compacted to a 95% standard proxy with approximately 51 tons of aggregate base for the 16-foot x 50-foot ramp and approximately 4 tons of aggregate base for the 16-foot x 20-foot apron of each ramp. Forms must be set with #4 rebar every 2-feet on center.

The ramp shall have an 8”deep (20” total from top of slab) x 8” turndown with 1 -#4 bar in the center of turndown. Turn down slab bars into the thickened slab edge and tie to horizontal bar.

Pour back and finish concrete as described. Concrete is to be 3,500 PSI with fiber and rolling stamp finished.

SCOPE OF WORK

The vendor will provide all equipment, materials, tools, and labor to remove and replace the boat ramp.

Remove the existing boat ramp and approach ramp consisting of the following dimensions.

o Approximately 1’ x 16’ x 70’ with rebar

Stockpile the old concrete and rebar for refuge staff disposal.

Compact each area with 51 tons of aggregate base for the 70’ long section (50’ ramp &

20’ approach ramp) as mentioned above.

Form and set ramps with #4 rebar set every 2’ on center matching the slope of the existing ramps and not exceeding 14% incline.

Rebar shall be set in the lower 1/3 of the slab. 6” tapered areas shall be placed in the center of the slab.

Concrete shall taper down to 6” at the lower edge of the ramp to allow for proper rebar cover of 3” Provide 6” curbing on each side of the boat ramp (excluding approach apron) Pour back and finish concrete for the boat ramp and straight in approach (may be slight field adjustments). Concrete to be 3,500 PSI w/ fiber reinforcements, no admixtures.

Concrete retarder is appropriate, although not required.

Provide “V” grooved angled tooled joints with a heavy broom finish on the ramp. Provide heavy broom finish on approach aprons. Provide tooled control joints as appropriate on both the ramp and approach apron.

Under normal conditions, the boat ramp edge will be submerged, currently the water is at level where de-watering/sheet piles are not required and the total length of the ramp is exposed.

PLACE/ DELIVERY LOCATIONS

U.S. Fish and Wildlife Service Havasu National Wildlife Refuge 12750 Riverfront Parkway Mohave Valley, AZ 86440

PERIOD OF PERFORMANCE

Work must be completed within 120 days of contract award date.

BONDING

There is no bid bond requirement. The payment bond/performance bond requirements are dependent upon the award amount. If your bid is over $35,000 a payment bond will be required; over $150k and both payment and performance bonds will be required.

NOTES

Water from the marsh may be used by the contractor for the compaction of subgrades, aggregates and base courses.

There is no requirement for engineered plans, permitting, SWPPP, BMP’s or dust control.

Demolition spoils and concrete with rebar removed from the project may be stockpiled at the site for use by the Refuge. Separation of rebar from concrete is not required.

No as-built plans of the ramps illustrated below are available.

No power/Electrical is available on the site for contractor use.

No restroom facilities are available on site for contractor use. Contractor my have porta-johns delivered during the duration of the project at the contractors expens.

HOURS OF OPERATION

The Contractor is responsible for conducting business, between the hours of 7:00 a.m. and 6:00 p.m. Monday through Friday except Federal holidays at the contractor’s option. The contractor must always maintain an adequate workforce for the uninterrupted performance of all tasks defined within this contract when the government facility is not closed. When hiring personnel, the contractor shall keep in mind that the stability and continuity of the workforce are essential. The facility is closed on recognized Federal holidays. The contractor is not required to perform work on these holidays:

New Year’s Day, January 1st or the Friday preceding or Monday following Martin Luther King’s Birthday, 3rd Monday in January President’s Day, 3rd Monday in February Memorial Day, Last Monday in May Juneteenth, June 19th or the Friday preceding or Monday following Independence Day, July 4th or the Friday preceding or Monday following Labor Day, 1st Monday in September Columbus Day, 2nd Monday in October Veteran’s Day, November 11th or the Friday preceding or Monday following Thanksgiving Day, 4th Thursday in November Christmas Day, December 25th or the Friday preceding or Monday following

PROJECT DIAGRAM

rrayner Text Box 16'x50'x1'

Exis ng Boat Ramp

Photo taken at the top of the boat ramp where the 16’x20’ pad is to be installed

From the bo om of the exis ng ramp.

Side shot of exis ng ramp

Photo taken from the top of the exis ng ramp. There is a pile of concrete near the construc on site (arrow). This is where the concrete removed from the exis ng ramp is to be stored for refuge personnel to move at a later date.

REFERENCE PHOTOS

These photos are from another project that was completed on the refuge last fiscal year.