Summary: Tariff revisions that would generate approximately $37,748 (1.96 percent) additional annual revenue to recover the increased cost of disposal fees set by King County. On January 1, 2019, disposal fees will increase from $134.59 per ton to $140.82 per ton at King County solid waste disposal facilities. SeaTac Disposal serves approximately garbage customers in King County. The company's last general rate increase became effective on January 1, 2018.