DTX-SOW- RDA Asphalt Replacement 5-11-2020.pdf

Statement of Work DTX-Detroit Michigan

National Weather Forecast Office RDA Asphalt Road Repairs

Scope: The Contractor shall provide all personnel, materials, labor, equipment, and supervision to complete the RDA Asphalt Road replacement/repair at the White Lake, MI (DTX) National Weather Service (NWS) Weather Forecast Office (WFO) according to the attached drawing (see Attachment A). This will take place from the existing gate at the WFO parking lot up to the RDA (Radar) Security fence.

Location:

NWS Weather Forecast Office 9200 White Lake Road White Lake, Michigan 48386-1126

Government Contact Point (GCP): David Ginnett (636-329-8349)

Description of Work: Quote will include complete removal of existing asphalt pavement road and subbase 8” below asphalt. Compact existing subbase, add new 8” base in lifts by mechanical compaction, install 4” asphalt in 2” lifts, compacted then seal coat and seal joints.

• Saw cuts will be performed at both ends of the road and at Upper Air Inflation Building (UAIB) turn-a-round. Asphalt will be removed and disposed off-site or recycled and/or re-used as a base or recycled for new asphalt.

• Before any work is started; Contractor will have an Electrician on site to locate & mark existing RDA Grounding Ring prior to excavating.

• Contractor will also contact local “locate” company to be sure all utilities are located & marked.

• Excavate both existing asphalt and then existing 9” subbase aggregate while maintaining elevation

(curvature in road) and slope per industry standards. Some of the material should be stockpiled (if acceptable) for use if over-excavation occurs or as material needs to be replaced (If up to road standards). Dispose all removed materials in accordance with local and State regulations. When all work is completed, the remaining stockpiled material shall be removed.

• Prepare and mechanically compact sub-grade and then supply & install 8” of # 22A of the correct subbase in lifts and mechanically compact in lifts. Any areas that yield, pump, or contain possible organic soil or other obviously objectionable material shall be removed and replaced with the new correct materials. Subbase shall be compacted to a minimum of 95% of maximum dry density as determined by the modified proctor test. Unsuitable materials, such as organic, spongy soil, rubble, trash, debris, or tree roots encountered within the limits of the work shall be removed and replaced with recommended rock fill. Rock fill shall not contain the above materials or rocks and hard clumps greater the three inches in size. Nesting of rocks shall not be permitted. At least 80 percent of the material provided for rock fill shall be smaller than ¾” inch in size. Low areas resulting from removal of unsatisfactory material shall be brought up to required grade with satisfactory materials and mechanically compacted, the entire subgrade shall be shaped to line, grade, cross section, and compacted to keep a standard curvature in the road to shed water.

• Base Compaction shall be accomplished by sheep foot rollers, pneumatic-tired compact roller equipment, steel-wheeled rollers, vibratory compactors, or other approved equipment well suited to the type of material being compacted.

• Sub-base shall be compacted to a minimum of 95% of maximum dry density as determined by the modified proctor test.

• Apply tack coat and a prime coat to the aggregate subbase of the area where asphalt was removed and new base installed.

• Place a composite bituminous layer per the Michigan Department of Transportation (MDOT) specification gradation consisting of one 2 inch lift of 13A for leveling base course and one 2 inch lift of 5E1 for the wearing course.

• Contractor shall restore the area around the work area to its original condition, which includes grading and side loading the road by 12” on each side of new asphalted road areas and leveling the disturbed areas.

Completion Date: This project shall be complete within 60 days from the date of notice to proceed.

The estimated start date is between August 1 and September 1, 2020. If any delays are expected, the Contracting Officer (CO), or GCP shall be notified as soon as possible to coordinate the modification.

Inspections and Acceptance: Upon completion, before invoicing and Release of Claims, contractor will notify the GCP for approval and/or acceptance.

Terms of the SOW:

1. The Contractor shall designate a local supervisor representative to the contract site, with contact numbers, for the MIC/ GCP to communicate with about the quality or work, progress, and technical details of the project. Neither the local representative nor the GCP has the authority to modify the contract in any manner which might affect the cost thereof.

2. The contractor will be responsible for the scheduling and coordination of work on the site with the GCP. This will include any required outages. In the event severe weather occurs within the warning area of the work site, all work being performed by the contractor may be halted by the local Meteorologist in Charge (MIC). Work stoppage due to severe weather in the warning area is not negotiable and all work will stop immediately.

3. All areas will need to be kept clean on a daily basis

4. Cones, caution tape, and safety devices will be required to be set by contractor in all areas where work is to take place.

5. Unless otherwise approved, the Contractor shall schedule all work Monday through Friday with work hours between the hours of 7:00 am and 5:00 pm local time. Longer work days and work on Saturday may be approved; however, no work will be performed on Sundays or Federal Holidays. The Contracting Officer and the GCP shall be notified when changes in the project schedule are requested along with the reason.

6. The Contractor shall be responsible for removal and disposal of all unused materials and placed equipment. All disposals shall conform to Federal, State and local environmental regulations.

7. The Government reserves the right to inspect for quality control at any point during the maintenance process.

8. Warranty on all work & materials is 1 year.

END OF SOW