These TMDLs address certain dissolved oxygen impairments in the Caloosahatchee River Basin. Specifically, the dissolved oxygen TMDL rules being proposed for adoption are for Townsend Canal (3235L), Long Hammock Creek (3237B), Lake Hicpochee (3237C), C-19 Canal (3237E), and S-4 Basin (3246). These waterbodies were verified for nutrient impairments due to elevated dissolved oxygen, using the methodology established in Chapter 62-303, F.A.C. This rulemaking has been given an OGC case number 19-0211.