The purpose and effect of the proposed rule amendment will be to adopt minimum water levels and flows for Silver Springs and the Silver River in Marion County.

 

WATER MANAGEMENT DISTRICTS

St. Johns River Water Management District

RULE NO.:RULE TITLE:

40C-8.031Minimum Surface Water Levels and Flows and Groundwater Levels

PURPOSE AND EFFECT: The purpose and effect of the proposed rule amendment will be to adopt minimum water levels and flows for Silver Springs and the Silver River in Marion County.

SUBJECT AREA TO BE ADDRESSED: The proposed rule would establish minimum water levels and flows for Silver River and a minimum flow for Silver Springs pursuant to the mandate of Section 373.042, Florida Statutes.  Each water level has an associated duration and return interval.  The terms herein are already defined in Chapter 40C-8, F.A.C.  As with all minimum levels and flows established by the District, if adopted, the minimum levels and flows in this rule amendment would be used as a basis for imposing limitations on withdrawals of groundwater and surface water in the consumptive use permit regulatory process and for reviewing proposed surface water management systems in the environmental resource permit regulatory process.

Members of the District’s Governing Board may attend the scheduled Rule Development Workshop.

RULEMAKING AUTHORITY: 373.044, 373.113 FS.

LAW IMPLEMENTED: 373.042, 373.0421 FS.

A RULE DEVELOPMENT WORKSHOP WILL BE HELD AT THE DATE, TIME AND PLACE SHOWN BELOW:

DATE AND TIME: April 22, 2014, 10:00 a.m. – 12:00 Noon

PLACE: Marion County Library – Ocala Branch, 2720 E. Silver Springs Blvd., Ocala, FL 34470

THE PERSON TO BE CONTACTED REGARDING THE PROPOSED RULE DEVELOPMENT AND A COPY OF THE PRELIMINARY DRAFT, IF AVAILABLE, IS: Wendy Gaylord, Rules Coordinator, St. Johns River Water Management District, Office of General Counsel, 4049 Reid Street, Palatka, Florida 32177, [phone], or [e-mail]

 

THE PRELIMINARY TEXT OF THE PROPOSED RULE DEVELOPMENT IS:

 

40C-8.031 Minimum Surface Water Levels and Flows and Groundwater Levels.

(1)(a) The following minimum groundwater levels and minimum mean annual spring flows are established:

Spring Name	County	Head (ft NGVD)	Discharge (cfs)
Messant Spring	Lake	32	12
Miami Springs	Seminole	27	4
Palm Springs	Lake	27	7
Rock Springs	Orange	31	53
Sanlando Springs	Seminole	28	15
Seminole Springs	Lake	34	34
Starbuck Springs	Seminole	31	13
Wekiwa Springs	Orange	24	62

(b) The following minimum median of annual median flow is established:

  Silver Springs                                       Marion                                                                      677

 

(2) The following minimum surface water levels and flows are established:

 

System Name	County	Minimum Level	Level (ft NGVD)	Level (ft NAVD)	Flow (cfs)	Hydroperiod Category	Duration (days)	Return Interval (years)
Black Water Creek at the SR 44 Bridge	Lake	Infrequent High	27.0		340	–	7	5
		Frequent High	25.8		145	–	30	2
		Average	24.3		33	–	180	1.7
		Frequent Low	22.8		2.5	–	90	15
		Phase 1 Restriction	22.7		2.0	–	–	–
		Phase 2 Restriction	22.5		1.0	–	–	–
		Phase 3 Restriction	22.4		0.6	–	–	–
		Phase 4 Restriction	22.3		0.3	–	–	–
		Infrequent Low	21.9		0.0	–	7	100
Silver River	Marion	Frequent High Average Frequent Low	40.8   39.1 38.8	39.9   38.3 37.9	880   640 600	–   – –	30   180 120	5   1.7 3
St. Johns River 1.5 miles downstream of Lake Washington weir	Brevard	Frequent High	15.3		1450	Seasonally Flooded	–	–
		Average	12.7		240	Typically Saturated	–	–
		Frequent Low	11.3		28	Semipermanently Flooded	–	–
St. Johns River at SR 44 near DeLand	Volusia	Frequent High	1.9		4600	–	30	3
		Average	0.8		2050	–	180	1.5
		Frequent Low	0.3		1100	–	120	5
Taylor Creek 1.7 miles downstream of structure S-164		Frequent High	–		95	Seasonally Flooded	–	–
		Average	–		17	Typically Saturated	–	–
		Frequent Low	–		0.5	Semipermanently Flooded	–	–
St. Johns River at SR 50 near Christmas	Orange and Brevard	Frequent High	8.1		1950	–	30	2
		Average	5.9		580	–	180	1.5
		Frequent Low	4.2		140	–	120	5
		Infrequent Low	2.7		43	–	60	50
Wekiva River at the SR 46 Bridge	Seminole and Lake	Infrequent High	9.0		880	–	7	5
		Frequent High	8.0		410	–	30	2
		Average	7.6		240	–	180	1.7
		Frequent Low	7.2		200	–	90	3
		Phase 1 Restriction	7.0		190	–	–	–
		Phase 2 Restriction	6.9		180	–	–	–
		Phase 3 Restriction	6.7		160	–	–	–
		Phase 4 Restriction	6.5		150	–	–	–
		Infrequent Low	6.1		120	–	7	100

(3) through (6) No change.

Rulemaking Authority 373.044, 373.113 FS. Law Implemented 373.042, 373.0421, 373.103, 373.415 FS. History–New 9-16-92, Amended 8-17-94, 6-8-95, 1-17-96, 8-20-96, 10-20-96, 11-4-98, 6-27-00, 2-13-01, 3-19-02, 5-12-03, 11-10-03, 1-12-04, 2-1-06, 12-3-06, 5-10-07, 5-24-07, 1-11-10, 8-22-13,____________.