The Washington State Department of Transportation (WSDOT) North Central Region is seeking a quote (RFQ) for 5000 Tons 3/8” – No. 4 MOD (Modified) gradation Chip Rock w/at least two fractured faces, and for 650 Tons No. 4 – 0 Choke material (≅ concrete sand). To find more details for this RFQ please visit WEBS and use the drop down menu to filter by "Transportation, Dept of" to find the Modified Chip Rock 3/8" - No.4