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Base Course Type 1 is a dense-graded crushed aggregate engineered for high-strength road base and foundation applications. Produced to meet NMDOT Section 303 specifications, it typically features a maximum top size of 1 inch minus, blending coarse stone and fines for tight compaction and long-term stability. Type 1 is generally used where maximum strength, durability, and long-term performance are required.
When properly compacted, Type 1 Base forms a durable, load-bearing layer that resists rutting, shifting, and settlement under heavy traffic. Commonly manufactured from crushed limestone or basalt, it delivers dependable performance in New Mexico’s varied climate and soil conditions.
Common applications for Base Course Type 1 (NMDOT 303)



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