A04_Specifications_REDW_Aggregate.pdf

Specifications Redwood National and State Parks

Supply and Deliver Specified Aggregate Solicitation #140P8423Q0023

Requirement:

The National Park Service (NPS) at Redwood National and State Parks (REDW) has a requirement for the supply and delivery of specified aggregate material. Delivery will be to two (2) separate locations located near Orick, California in Humboldt County. The Contractor must specify the source of aggregate material and meet contract specifications as outlined in 1 ½ inch Base Aggregate Specifications. NPS may increase tonnage amounts as outlined in Option Line 2 and Option Line 3, dependent on the availability of funding.

Base Item Line 1:

Supply 3500 tons of 1 ½ inch base aggregate.

Material shall be delivered to the stockpile site within Redwood National Park in the Orick, California, area.

Option Line 2:

Supply/Deliver 3,000 tons of 1 ½ inch base aggregate. Contractor will deliver a minimum of 275 tons a day.

Material shall be delivered to Coyote Peak Rd. Orick, CA.

The material will be tailgate spread by dump trucks or transfer trucks; no end or belly dumps are accepted due to small turnarounds. NPS staff will be conducting road grading during the time of delivery of Bid Option A; no delays for trucking are anticipated.

Option Line 3:

Supply an additional 1 ½ inch base aggregate in 250-ton increments up to 5,000 Tons.

Additional tonnage will be delivered to the stockpile site for Base Item 1.

Please see Attachment 1 – Bald Hills Tail Gate Spread Map and Attachment 2 – Orick Stockpile Map for exact delivery information.

Period of Performance:

Delivery of material shall be completed from 6/10/24 to 9/10/24.

Delivery Schedule:

Aggregate deliveries will be accepted Monday through Friday from 7:30 am to 4:30 pm, Pacific Standard Time.

Deliveries will not be accepted on federal holidays. Deviations from the delivery schedule may be negotiated on a case-by-case basis with the Contracting Officers Designated Representative (COR).

Delivery commencement must be coordinated with the Redwood National and State Park Road Supervisor.

Submittals A sample report shall be provided with bid submission for each line item. A minimum of 3 cubic foot 1 ½ inch base aggregate, with sieve analysis and laboratory documentation certifying the aggregate meets the contract specifications.

The vendor shall supply additional samples, sieve analysis and laboratory documentation as follows.

• Provide sieve analysis and laboratory documentation certifying aggregate meets the contract specifications prior to commencement of aggregate delivery for each bid item.

• Vendor shall perform aggregate testing, on each bid item one additional time during production or delivery of aggregate to demonstrate adherence to contract specifications.

• Government representative shall be notified with two days’ notice prior to sampling of material for testing.

Weight tickets must be provided for each load.

1 ½ inch Base Aggregate Specifications:

Contractor to furnish hard, durable particles or fragments of crushed aggregate base conforming to the size and quantity requirements for crushed aggregate material normally used locally in the construction and maintenance of highways by Federal agencies. Furnish quarried crushed aggregate with a maximum size of 1 ½ inch as determined by AASHTO T27 and T1.

Contractor to furnish crushed aggregate uniformly graded from coarse to fine and free of organic matter, lumps, balls of clay and other deleterious matter.

• Aggregate must be derived from natural stone formation which has been mined or quarried.

• No recycled material or material derived from river run material will be accepted.

1 ½ inch aggregate must conform to sections A and B below:

A. General Furnish hard, durable particles or fragments of crushed stone conforming the following:

• Los Angeles abrasion, AASHTO T 96 35-50% Sodium sulfate soundness loss (5 cycles), 12% max

AASHTO T 104

• Durability index (coarse), AASHTO T 210 35 min.

• Durability index (fine), AASHTO T 210 35 min.

• Fractured faces, ASTM D 5821 75% min.

• Free from organic matter and lumps or balls of clay Do not use material that breaks up when alternately frozen and thawed or wetted and dried.

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

B. Subbase or base aggregate

In addition to (a) above, conform to the following:

Gradation Table 1 Liquid limit, AASHTO T 89 25 max.

TABLE 1

1 ½” maximum

Percent Passing

Sieve Sizes Operating Range Contract Compliance

2” 100 100

1 ½” 90-100 87-100

1” ---- ----

¾” 50-85 45-90

No. 4 25-45 20-50

No. 30 10-25 6-29

No. 200 2-9 1-12

Aggregate materials must be free of all the following:

• Canada thistle (Cirsium arvense)

• Dalmatian toadflax (Linaria dalmatica ssp. dalmatica)

• diffuse knapweed (Centaurea diffusa)

• fennel (Foeniculum vulgare)

• French broom (Genista monspessulana)

• Himalayan blackberry (Rubus armeniacus)

• Italian thistle (Carduus pynnocephalus)

• leafy spurge (Euphorbia esula)

• meadow knapweed (Centaurea X pratensis)

• hedge bindweed/ morning glory (Calystegia sepium)

• pampas/jubata grass (Cortadaria jubata)

• Scotch broom (Cytisus scoparius)

• Spanish broom (Cytisus multiflorus)

• Spanish heather/heath (Erica lusitanica)

• tansy ragwort (Senecio jacobeae)

• three corner leek (Allium triquetrum)

• yellow star thistle (Centaurea solsitialis)

Please see attachments below:

Attachment 1 – Bald Hills Tail Gate Spread Map

Attachment 2 – Orick Stock Pile Map