12. Foundry Sand, Fly Ash Flowable Fill CTH D, CTH G, Sheboygan Co. 13. Fly Ash CL CF CLSM I90/94, Columbia Co., fill for several culverts 14. Screened Bottom Ash Base course STH 35, Crawford Co., STH 82 for 14 15 to DeSoto Rd. 15. Natural Bottom Ash Base course STH 35, Crawford Co., CTH C to STH 82 16. Cupola Slag Base course USH 10, Waupaca Co. 17.