4134.01DESCRIPTION
Uncrushed natural sand and gravel or natural sand.
4134.02GRADATION
Meet requirements for Gradation No. 1, Gradation No. 35, or Gradation No. 36 of the Aggregate Gradation Table, Article 4109.02.
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Source: Iowa Standard Specifications for Highway and Bridge Construction, 2023 Edition. Pages 1099–1099 of 1,288. View official source ↗