
Washed, graded, tested weekly.
River sand and gravel are washed of silt and clay, then screened into sizes. A sieve test every week keeps the grading inside spec.
- Coarse
- ¾" and ⅜" crushed gravel
- Fine
- Washed river sand, FM 2.6–2.9
- Test
- Sieve analysis, every Monday






