Several years ago, WSDOT changed its internal recommendations for pavement resurfacing methods. The focus of this change was to save money, but the point of this discussion is the conservation of our natural resources that is occurring because of this change. The new guidelines allow BST chip seal on roads up to 10,000 average daily traffic (ADT), up from 5,000 ADT. (It was 2,000 ADT 15 years ago). This potentially adds many thousands of miles to the WSDOT chip seal program. This change to use less HMA and more chip seal is saving many thousands of tons of liquid asphalt base and many hundreds of thousands of tons of aggregate.