Statement of Work

AGGREGATE STONE: W911RX-26-Q-A032

1.STATEMENT OF WORK (SOW)

1.1 This Statement of Work (SOW) defines the requirements for the procurement, hauling, and delivery of various aggregate stone materials to multiple Directorate of Public Works sites. The primary objective is to maintain tactical trails, base road infrastructure, and erosion control measures essential for sustained mission readiness.

2. Technical Specifications

2.1 All aggregate materials must conform to the following specifications. The contractor is responsible for providing laboratory certification (AASHTO or ASTM standards) for each material lot prior to the initial delivery.
Material
Code

Specification
Reference

Primary Mission Application

AB-3

KDOT Section 1104 /
MoDOT Type 5

Aggregate Base Type 3: High-density base course for heavy-duty tactical vehicle lanes and hardstands.

SA-1

Select/Stabilized
Aggregate (Grade 1)

Select Aggregate: Used for subgrade stabilization and shoulder reinforcement where high shear strength is required.

SS-5

Screened/Special
Sand (Fine)

Special Sand: Ideal for pipe bedding, utility trench backfill, and as a leveling course for interlocking pavers or masonry units.

Material
Code

Specification
Reference

Primary Mission Application

Fill Sand
(FA-3)

Unclassified
Structural Fill

Utility & Protection: General-purpose sand used for trench backfill, leveling under slabs, and filling sandbags for force protection/fortification. Applied to runways, helipads, and tactical roads during winter operations to increase traction for aircraft and heavy equipment.

3. Gradation & Quality Control

3.1 The contractor is responsible for ensuring the following technical parameters are maintained throughout the delivery cycle:
Property

Requirement for AB-3 / SA-1

Requirement for SS-5

Plasticity Index
(PI)

Typically, 2 to 8 (Non-Plastic for SA-1)

Non-Plastic (NP)

Sieve Analysis

Must meet 1.5" to #200 sieve
gradation.

100% passing #4 sieve; restricted fines.

Moisture Content

Maintained within ±2% of optimum.

Free draining; max 5% moisture by
weight.

Deleterious Sub.

Max 5% (Shale, Coal, or Soft Rock).

Clean; free of organic matter or clay
balls.

Fill

Unclassified

Utility & Protection: General-purpose sand used for trench backfill,

Sand

Structural Fill

leveling under slabs, and filling sandbags for force

(FA-3)

protection/fortification. Safety Operations: Mixed with Road Salt during winter operations to increase traction.

3.2 Technical Requirements for Sand

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Purity: All sand codes (FA-1 through FA-4) must be free of organic matter, roots,