Specs_Bulk_Ramp_Materials.pdf

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CAPE HATTERAS NATIONAL SEASHORE

Outer Banks Group

Material Specifications

FY 22 Provide Bulk Ramp Materials

1.0 INTRODUCTION

The National Park Service (NPS) Outer Banks Group (OBG) has a requirement for construction materials delivered to multiple sites on Cape Hatteras National Seashore.

Delivery locations include:

1) Bodie Island Boneyard (Off of Lighthouse Bay Drive south of Nags Head) See Figure 1.

a. 35 o 49’ 14.04” N, 75 o 33’ 56.49”W

2) Buxton - Parking area between Cape Point CG and South beach Road (back of Cape

Point Campground) See Figure 2.

a. 35 o 14’06.73” N, 75 o 32’37.52” W

3) Ocracoke Maintenance Yard - Behind the Ranger Station See Figure 3.

a. 35 o 07’03.67” N, 75 o 59’01.86” W

3.0 BACKGROUND AND EXISTING CONDITIONS

The NPS maintains vehicle access ways to the National Seashore using a variety of materials for the surface. A mixture of clay and shells per the instructions of the North Carolina Coastal Area

Management Agency (CAMA) is used for repairs and maintenance to the access ways. NC

Highway 12 runs from Bodie Island south to Ocracoke Island. The NPS has sand ramps at various locations along Highway 12.

The following pictures show aerial photos of the delievery sites:

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Figure 1. Bodie Island Boneyard, Nags Head, NC

Figure 2. Cape Point Campground Parking Lot, Buxton, NC

Figure 3. Ocracoke Maintenance Yard

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4.0 Materials Specifications

The contractor will provide all technical support, materials, tools, equipment, and manpower required to provide the NPS with the following:

Base: Provide the following at the locations listed. The Contractor must meet the requirements and deliverables. Take special note of the additional requirements below – receipts showing weights/volumes must be provided to the NPS and a copy kept for the Contractor’s records.

Bodie Island Boneyard:

• 90 cubic yards of sand

• 90 cubic yards of clay material

• 100 cubic yards of clam shell material

Buxton - Cape Point Campground Parking Lot:

• 1,050 cubic yards of clam shell material

Ocracoke Maintenance Yard:

• 210 cubic yards of sand

• 210 cubic yards of clam shell material

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Material Requirements:

1) The clay soil mixture must meet the following specifications:

a. The clay mix must be obtained from a source considered local to the Outer Banks.

Local material is considered to be material having a zero content of invasive species of plants, or any organic material. Top soil will not be accepted.

Unsuitable material will be rejected and returned to the vendor at the vendor’s expense and will not be dumped on site.

b. The clay mix will be a product referred to as sandy loam and have an overall gradation of the following: 55-79 percent sand; 5-20 percent silt; and 12-20 percent clay.

c. Percentages of the listed soil contents may vary by plus or minus 2-3 percent, which can be discussed with the vendor providing the material.

d. The vendor supplying the clay mix is responsible for obtaining test results of the content of the material. The test results must be submitted to the NPS prior to delivery. Test results must be performed by an independent lab. The test requirement is for one sample per dig location, or one sample per 250 cubic yards, whichever is greater. The soil analysis must show the particle distribution including at a minimum:

i. Sieve size

ii. Percent passing each sieve

iii. Total percent gravel/coarse grains

iv. Total percent sand

v. Total percent silt

vi. Total percent clay

vii. Soil group classification

2) The clam shells must meet the following specifications:

a. The clam shells must be crushed and rolled to reduce edges. Whole shells should not account for more than 25% of the delivered material.

b. Scallops, cockle shells, whelks, and cone shells can be included but should not be more than 10% of the total shell volume.

c. Oyster shells may not be substituted.

3) The sand must meet the following specifications:

a. The sand must be obtained from a source considered to be local to the Outer

Banks. Local material is considered to be material having zero content of invasive species of plants, or any organic material. Top soil will not be accepted.

Unsuitable material will be rejected and returned to the vendor at the vendor’s expense and will not be dumped on site.

b. The vendor supplying the sand is responsible for obtaining test results of the content of the material. The test results must be submitted to the NPS prior to delivery. Test results must be performed by an independent lab. The test requirement is for one sample per dig location, or one sample per 250 cubic yards, whichever is greater. The soil analysis must show the particle distribution including at a minimum:

i. Sieve size

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ii. Percent passing each sieve

iii. Total percent gravel/coarse grains

iv. Total percent sand

v. Total percent silt

vi. Total percent clay

vii. Soil group classification

c. Sand must be a medium grade/ building or fine sand material meeting that meets the following gradation:

Sand Gradation

Sieve Size Percent Passing

#4 95-100

#8 85-100

#10

#16 50-85

#30 25-60

#40

#50 5-30

#60

#80

#100 0-10

#200* 0-10

Although silt material is generally undesirable, 5-10% clay material is acceptable in Sand

The NPS reserves the right to take samples of any or all deliveries to be tested for consistency and material distribution. The NPS reserves the right to deny acceptance for any delivery that does not meet expectations as agreed upon between the NPS and contractor providing the material. If the material is deemed inadequate the NPS may reject the delivery and the contractor must provide material that conforms to specifications. The contractor may obtain additional samples and test above the required number at his own expense to verify overall consistency of the deliveries.

ADDITIONAL REQUIREMENTS:

1) The vendor will be required to call the NPS point of contact (POC) for exact location on the day of delivery.

2) The Contractor must abide by the conditions listed in the Deliverables section of this scope of work.

3) The Contractor is responsible for all drivers and vehicles used for deliveries. These sites are considered off road and may require backing, turning, dumping, etc. on or near unpaved areas. The Contractor is responsible for verifying existing conditions prior to and at time of delivery.

4) The Contractor is required for scheduling deliveries to meet ferry routes to and from

Ocracoke Island. Contractor vehicles are authorized to utilize the priority lane for ferry routes between Hatteras Island and Ocracoke Island.

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5) Each vehicle/truck providing a delivery must also provide a receipt showing the materials being delivered to include volume, weight, dimensions, etc.

6) The Contractor must keep his own record/receipts of delivery in order to request payment. Accumulated totals of each type of material must be provided to the POC prior to submitting an invoice for payment.

Option 1: Supply and deliver to the following locations listed. Receipts showing

• 500 cubic yards of clam shell material

Option 2: Supply and deliver to the following locations listed. Receipts showing

Bodie Island Boneyard:

• 210 cubic yards of clam shell material

• 300 cubic yards of clam shell material

Ocracoke Maintenance Yard

• 210 cubic yards of clay material

5.0 DELIVERABLES

The Contractor will be required to submit electronic and paper copies of testing reports to the

NPS prior to delivery.

Delivery of material on site will only be accepted from 7:00 am through 3:30 pm Monday through Friday. Other arrangements must be requested in writing through the Contracting

Officer and may be accommodated depending upon the location and request. Due to the high volume of expected deliveries, and Ocracoke Ferry schedule, the contractor will be required to contact the POC to assure proper receipt of the materials at the delivery location.

The contractor is highly encouraged to contact the POC prior to shipment to gain an understanding of the vicinity of the delivery sites. Vehicles which can perform the required turn-around, such as tandem dump truck, may be advantageous.