These TMDLs address certain nutrient impairments in the Indian River Lagoon Basin. Specifically, the TMDL rules being proposed for adoption are for Sykes Creek and Goat Creek (Marine Segment). These waterbodies were verified as impaired for nutrients due to elevated chlorophyll a concentrations using the methodology established in Chapter 62-303, F.A.C., Identification of Impaired Surface Waters. Based on statistical analyses of spatial and temporal patterns of nutrient-related data in these impaired waters and their neighboring Indian River Lagoon and Banana River Lagoon segments, it was determined that the observed elevation in chlorophyll a concentrations in these impaired waters were mainly caused by receiving water processes in the mainstem of the Indian River Lagoon and Banana River Lagoon. Therefore, the nutrient loading targets for these two creeks are established to be consistent with those adopted previously into this rule to protect seagrass in the Indian River Lagoon and Banana River Lagoon mainstem. The existing nutrient loadings and nutrient TMDLs entering these creeks were simulated using the Pollutant Load Screening Model (PLSM). This rulemaking has been given OGC case number 12-1363.