finding materials

 the red clay that i found on vantage highway is on a road cut that goes up the first hill going east out of ellensburg MP 9 or 10 area

 the sand was found along highway 10 near MP 100

the white clay on vantage highway which made it to ^10 was found near MP 17

the clay I found north of Shelton was in the woods behind my sisters property. a ravine begins in the woods and there is a water fall where erosion has occurred and there is an 18 inch deep deposit of very nice looking white clay that unfortunately did not survive to ^10