Attachment D_SPS_5.13.26_127EAX26Q0086.docx

This is a Special Project Specifications (SPS) attachment containing technical requirements for aggregate materials and contract document coordination procedures for a road reconstruction project. The document establishes a hierarchy of binding contract documents for the Barillas Peak Road Reconstruction on the Santa Fe National Forest, with Special Project Specifications taking precedence over Plans, Forest Service Supplemental Specifications, and Standard Specifications (FP-24), respectively. In cases of discrepancy, calculated dimensions govern over scaled dimensions.

The specification details surface course aggregate requirements under section 703.05 (R3-G Forest Service Aggregate), mandating hard, durable crushed stone, slag, or gravel materials that meet stringent quality standards including Los Angeles abrasion of 35 percent maximum, sodium sulfate soundness testing with 12 percent loss maximum for both coarse and fine aggregate, minimum durability index of 35 for both aggregate types, and 75 percent minimum fractured faces. Materials must conform to the specified gradation table with sieve size requirements ranging from 1 inch down to No. 200, maintain a plasticity index of 4-10 (with provisions to add 2 percent bentonite if the index falls below 4), and be free of organic matter and clay lumps. Additional requirements include liquid limit testing not to exceed 35 maximum and compliance with specified AASHTO testing methods.