Middle St. Johns - Florida Department of Environmental Protection

20 Water Quality Assessment Report: Middle St. Johns
Table 4.2: The Verified List of Impaired Waters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151
Table 4.3: Number of TMDLs Required for Each Planning Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
Table 4.4: Number of Listings for Each Parameter Exhibiting the Impairment . . . . . . . . . . . . . . . . . 175
Table 4.5: Middle St. Johns Basin Nitrogen to Phosphorus Ratios for the Verified Period . . . . . . . . 176
Table 4.6: Screening Level Values (70th Percentile) Based on STORET Data from 1970 to 1987 . . . 178
Table 4.7: Middle St. Johns Basin Median Values for the Verified Period . . . . . . . . . . . . . . . . . . . . 179
Table 5.1: Priorities for TMDL Development in the Middle St. Johns Basin . . . . . . . . . . . . . . . . . . . 182
Figures
Figure 1.1: Schedule for Implementing the Watershed Management Cycle in the Department’s
Central District, Basin Groups 1 through 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 2.1: Geopolitical Map of the Middle St. Johns Basin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 2.2: Managed Lands in the Middle St. Johns Basin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 2.3: Surface Water Resources of the Middle St. Johns Basin . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 2.4: Wetlands in the Middle St. Johns Basin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 2.5: Potentiometric Surface of the Floridan Aquifer during 1995, Indicating the Direction of
Ground Water Flow in the Middle St. Johns Basin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 2.6: Recharge to the Floridan Aquifer in the Middle St. Johns Basin during 1995 . . . . . . . . . . 49
Figure 2.7:
Portion of the Middle St. Johns Basin Included in the 1998 Priority Water Resource
Caution Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 3.1: Sources of Data for the Middle St. Johns Basin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 3.2: Locations and Boundaries of Planning Units in the Middle St. Johns Basin . . . . . . . . . . . 73
Figure 3.3: Composite Map of the Alexander Springs Creek Planning Unit, Including the 1998
303(d) List, Planning List and Verified List Waters, and Potential Pollution Sources . . . . . 75
Figure 3.4: Composite Map of the Deep Creek Planning Unit, Including the 1998 303(d) List,
Planning List and Verified List Waters, and Potential Pollution Sources . . . . . . . . . . . . . . 79
Figure 3.5: Composite Map of the Econlockhatchee River Planning Unit, Including the 1998
Figure 3.6:
Figure 3.7:
Figure 3.8:
Figure 3.9:
Figure 3.10:
Figure 3.11:
303(d) List, Planning List and Verified List Waters, and Potential Pollution Sources . . . . . 86
Composite Map of the Lake George Planning Unit, Including the 1998 303(d) List,
Planning List and Verified List Waters, and Potential Pollution Sources . . . . . . . . . . . . . . 98
Composite Map of the Lake Jesup Planning Unit, Including the 1998 303(d) List,
Planning List and Verified List Waters, and Potential Pollution Sources . . . . . . . . . . . . . 104
Composite Map of the Lake Kerr Planning Unit, Including the 1998 303(d) List,
Planning List and Verified List Waters, and Potential Pollution Sources . . . . . . . . . . . . . .117
Composite Map of the Lake Monroe Planning Unit, Including the 1998 303(d) List,
Planning List and Verified List Waters, and Potential Pollution Sources . . . . . . . . . . . . . 121
Composite Map of the Lake Woodruff Planning Unit, Including the 1998 303(d) List,
Planning List and Verified List Waters, and Potential Pollution Sources . . . . . . . . . . . . . 129
Composite Map of the Wekiva River Planning Unit, Including the 1998 303(d) List,
Planning List and Verified List Waters, and Potential Pollution Sources . . . . . . . . . . . . . 135
Figure 4.1: Waters on the Verified List, with Projected Year for TMDL Development . . . . . . . . . . . . 173
Figure 5.1: Middle St. Johns Basin Priority TMDL Priority Watersheds for 2003 . . . . . . . . . . . . . . . 183