A04 Aggregate Import SOW - Ivanpah - W.docx

MOJA – Import Aggregate Base

Mojave National Preserve

San Bernardino County, California

STATEMENT OF WORK:

Import Aggregate to Repair Potholes

DATED:

April 27, 2021 Prepared By: Debra Hughson

NATIONAL PARK SERVICE

Mojave National Preserve Statement of Work FOR Import Aggregate Base

1. Background Mojave National Preserve is located in San Bernardino County east of Barstow, CA. The primary worksite is along the partially paved section of Ivanpah Road approximately 7 to 13 miles southwest of the Nipton Road exit off Interstate 15. This work site is along a partially paved road between Morningstar Mine Road and Union Pacific. The quickest access is from the Nipton Road exit to Ivanpah Road and then south. The road is passable by truck although it can be rough in places. The primary site starts at 35° 24.753'N 115° 22.627'W and extends to 35° 20.478'N 115° 18.921'W. Extra material, if any, will be place at the preserve’s discretion from the second set of coordinates to 35° 12.193'N 115° 12.155'W.

2. Objectives:

This project consists of delivering aggregate base material conforming to the attached technical specifications (Appendix A) to the job site and unloading (dumping) the material on the road surface as directed by the onsite Project Supervisor.

3. Place of Performance:

Job site in Mojave National Preserve, San Bernardino County, CA

Permitted Work Hours: Monday through Friday, 7:00am – 5:00pm

4. Period of Performance:

All tasks and deliverables for this contract must be completed between the dates of July 1 and December 31, 2021. At the park’s discretion during desert tortoise active season, trucks may be required to follow an escort vehicle and driver provided by NPS to avoid desert tortoise impacts.

5. Scope:

This project consists of delivering aggregate base material conforming to the attached technical specifications (Appendix A) to the job site and unloading (dumping) the material on the road surface as directed by the onsite Project Supervisor. Deliveries will be staged at the park’s discretion in order to give NPS equipment operators adequate time to spread, water, and roll compact the material.

An estimated 5690 cubic yards of aggregate base material conforming to the technical specifications in Appendix A are expected to be required to be delivered to the two job sites in quantities to be specified by the Job Supervisor. We expect approximately half of the total delivered to each of the two job sites. Bids will be evaluated on the basis of cost per cubic yard delivered to the job sites with total delivered quantity estimated at 5690 cubic yards with an uncompacted bulk density of approximately 100 lbs/ft3. Bids may also be given per ton if the uncompacted material bulk density in the truck is specified.

6. Tasks:

Under this contract, the contractor shall complete the following tasks and requirements:

· Provide workplan and materials technical specifications by June 25, 2021.

· Schedule deliveries with the Project Supervisor.

· Deliver aggregate base material meeting the technical specifications to the job sites as instructed by the Project Supervisor.

· Place material along the unpaved road as instructed by the Project Supervisor.

· At the Park’s discretion, trucks may be required to follow a pilot car during desert tortoise active season.

· Deliveries must be at the rate specified by the Project Supervisor such that NPS equipment operators can spread, water, and roll the delivered material. Stockpiling will not be allowed.

· Trucks must stay on the road. Damage to native vegetation will not be allowed.

7. Deliverables:

· Approximately 5690 cubic yards of aggregate material meeting the technical specifications in Appendix A.

8. Government-Furnished Property, Material, Equipment, or Information (GFP, GFM, GFE, or GFI):

N/A

9. SAFETY:

This contractor is to follow at a minimum all OHSA rules and procedures. A required safety plan must be submitted and approved before any work is to begin. This plan shall identify any hazards related to the work and provide measures to follow to mitigate risk.

10. Security:

N/A

11. Travel:

Contractor shall be responsible for all travel related expenses for this project, including mobilization of equipment, tools, materials, manpower, lodging, meals, and per diem.

12. Special Material Requirements:

See Appendix A.

13. Other Unique Requirements:

Contractors will receive Desert Tortoise training.

14. Quality ASSURANCE Requirement:

The contractor shall develop and maintain a quality assurance program to ensure services are performed in accordance with commonly accepted standard practices and in compliance with all applicable code. The contractor shall develop and implement procedures to identify and prevent defective workmanship. As a minimum the contractor shall develop quality control procedures addressing the critical areas identified in this statement of work. The government will periodically evaluate the contractor’s performance in accordance with the statement of work.

Material must meet the technical specifications in Appendix A. The contractor shall provide copies of AASHTO T 96, AASHTO 104, AASHTO T, ASTM D 5821, and AASHTO T 89 test results. Samples may be collected and tested on site. Material not meeting these technical standards will be rejected.

While performing work, the contractor shall comply with the latest applicable versions of the following:

· NFPA 101 (National Fire Protection Association's Life Safety Code)

· MUCTD Standards and Policies

· Occupational Safety and Health Administration (OSHA) requirements

Additional Requirements:

· Any damages to property or park resources will be fixed and repaired at no cost to the government.

· Drivers will abide by all direction given for protection of the desert tortoise according to the Park’s Wildlife Biologist.

15. Project Personnel:

Contracting Officer:

Jim Read NPS Mojave National Preserve Telephone: (760) 252-6112 Email: jim_read@nps.gov

Park Facility Manager:

Debra Hughson - Acting NPS Mojave National Preserve 2701 Barstow Road Barstow, CA 92311 Telephone: (760) 252-6105 Email: debra_hughson@nps.gov

Project Supervisor:

BK Baker Mojave National Preserve Telephone: (714) 785-4686 Email: Bartlett_Baker@nps.gov

Appendix A. Surface Course Aggregate

Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming to the following:

(1) Los Angeles abrasion, AASHTO T 96 50% max.

(2) Soundness of aggregate using sodium sulfate, 12% loss max.

AASHTO 104 (5 cycles)

(3) Gradation and Plasticity Index, AASHTO T 90 Table 703-3 below

(4) Free from organic matter and lumps or balls of clay

(5) Fractured faces, one or more, ASTM D 5821 50% min.

(6) Liquid limit, AASHTO T 89, Method A 35 max.

% passing #200 % passing #40

(7) Dust ratio: 2/3 max.

Obtain the aggregate gradation by crushing, screening, and blending processes as necessary. Fine aggregate, material passing the No. 4 sieve, will consist of natural or crushed sand and fine mineral particles.

Do not furnish material that contains asbestos fibers.

Table 703-3 Target Value Ranges for Surface Course Gradation and Plasticity Index

Designated Sieve (AASHTO T 27 and T 11)

(1) Statistical procedures do not apply.

( ) Allowable deviations (+/-) from the target values image1.wmf image2.jpg