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Shell and Prairie Creek Watersheds
Management Plan;
Reasonable Assurance Documentation and
Performance Monitoring Results
Roberta Starks
# Staff FDEP has Absconded from SWFWMD
-4-3-2-10
12345
# S
taff
SWFWMD FDEP
Shell and Prairie Creek Watersheds
Management Plan;
Reasonable Assurance Documentation and
Performance Monitoring Results
Roberta Starks
Water Quality Impairment Identified – TMDLs
• In 2004 FDEP listed three Class I waters in the Shell & Prairie Creek Watersheds as verified impaired:– WBID #2040 Myrtle Slough (Shell Creek)
• Chloride, sp. conductance, TDS– WBID #2041 Shell Creek
• Chloride, sp. conductance, TDS– WBID #1962 Prairie Creek
• Sp. conductance, TDS
In 2002, the City of Punta Gorda’s Reservoir Exceeded Secondary Drinking
Water Standards for Chloride
Drought Conditions
Land Use in Watersheds
• Agriculture dominates– 53% of area is agricultural land use– 179 water use permits in Shell & Prairie
Creek Watersheds• 89% are agricultural• 62.6 mgd permitted• Majority are citrus agriculture
Location of SPJC Watersheds
Response to Impairment• Stakeholders group formed 2001:
– Florida Department of Environmental Protection– Florida Department of Agriculture and Consumer Services– Southwest Florida Water Management District– South Florida Water Management District– University of Florida Institute of Food and Agricultural Science– USDA/NRCS– Charlotte Harbor National Estuary Program– City of Punta Gorda– Charlotte County– Desoto County– Peace River Valley Citrus Growers Association– Florida Farm Bureau– Florida Citrus Mutual– Desoto/Charlotte Farm Bureau– Florida Fruit and Vegetable Association– Charlotte Harbor Environmental Center– East Charlotte Drainage District– Joshua Water Control District– Private Agricultural Interests
Response to Impairment• Stakeholders develop a “Reasonable
Assurance Plan” documenting management actions that will restore water bodies to unimpaired conditions – TMDLs will not be developed– RA Plan will be responsible for improving water quality
• Goal of Reasonable Assurance Plan– Improve water quality to meet Class I Standards
• TDS < 500 mg/l • Chloride < 250 mg/l
– Goal will be reached by 2014– Goal will be achieved through implemented management
actions– Frequent reporting on performance monitoring results
Management Actions• SPJC Well Back Plugging Program• Facilitating Agricultural Resource Management Systems
(FARMS) Program• SWFWMD Resource Regulation• Quality of Water Improvement Program (QWIP)• Environmental Quality Incentives Program (EQIP)• Florida Dept. of Agriculture & Consumer Services
(FDACS) - Best Management Practices (BMPs)• Land Acquisition• SWUCA Recovery Strategy/Regional Water Management
Plan• Research and Education/Outreach
SPJC Well Back-Plugging• Funding assistance initiated• Designed to back-plug wells to improve
water quality– Over $400,000 currently budgeted (maximum
reimbursement of $6,500/well)– 1000 uS/cm goal for each well– To date 40 wells have been back-plugged
• Avg. reduction in Cl = 68%• Avg. reduction in TDS = 55% • Avg. yield loss = 24%
Pre Back-Plugging Post Back-Plugging
FARMS Program Overview• FARMS is a BMP cost-share reimbursement
program for agricultural projects located in the SWUCA– Reduce Floridan Aquifer ground water withdrawals– Improve water quality– Conserve, restore, or augment water resources and
ecology
• Provides up to 75% reimbursement for project costs
• Total funding over $6M
What does FARMS Fund?• Precision Irrigation
– Soil Moisture Meters
– Auto Pump Starts/Valves
• Alternative Supplies– Surface
water– Tail water
recovery• Requires
agricultural reservoirs
FARMS Program Status
• Two priority areas in the SWUCA– Upper Myakka Watershed (Manasota)– Shell, Prairie, and Joshua Creek Watersheds
(Peace)
• 37 Board approved projects– 11.2 mgd predicted ground water offset – 19 Complete and operational projects
• Possible District-wide expansion in FY2008
Resource Regulation
• Well Construction Permitting– Permit stipulations in SPJC area on new
wells• Provide maximum TD limits• Require water quality sampling with depth• Establish a maximum sp. conductance limit
of 1,000 uS/cm on well discharge
Resource Regulation
• Water Use Permitting– Special conditions on new/renewed
permits in SPJC area• Well sampling• Participation in Well Back-Plug Program or
FARMS• 78% of existing permits in SPJC will be
reviewed/renewed by 2014
Quality of Water Improvement Program (QWIP)
• Established in 1974 to improve impacted water quality due to improper well construction or abandoned flowing wells– 47 wells plugged (total plug) in Shell and
Prairie Creek watersheds – Long-term program with funding level of
approximately $650,000 annually
Status of RA Plan Approval
• In March 2005, FDEP provided a letter to the District indicating their approval of the RA Plan
• The EPA provided a letter indicating support of the RA Plan - pending final review of the Group 3 verified impaired waters list
• The Group 3 list is under further revision• The RA Plan will be first in the nation to be
approved by the EPA
Shell Creek and Prairie Creek Watersheds Management Plan
Performance Monitoring Summary
for time period October 2004 – July 2006
Water Segments in Shell & Prairie CreekWatersheds Listed as TMDL Verified ImpairedWater
Segment WBIDWater Body Type
Basin/Watershed Impaired Area
Pollutants of Concern
Prairie Creek 1962 Stream Peace River/
Prairie Creek 29 mi. Sp. Conductance, TDS
Shell Creek 2041 Stream Peace River/Shell Creek 10.5 mi. Sp. Conductance,
Chloride, TDS
Myrtle Slough 2040 Stream Peace River/
Shell Creek 6 mi. Sp. Conductance, Chloride, TDS
Performance Monitoring WQ Networks & Data Sources
• In-Stream Specific Conductance Logging Network (District & USGS)
• Specific Conductance Reconnaissance Network (District)• Pre- and Post Back-Plugging Well Monitoring Network
(District) • Surface-Water Quality Monitoring Networks (District,
FDEP, City of Punta Gorda)• Coastal Ground-Water Quality Monitoring Network
(District)• Water-Use Permitting Ground-Water Quality Monitoring
Network (District)
Prairie Creek WatershedSpecific Conductance Logging Results
Prairie Creek @ Washington Loop Rd.
0
200
400
600
800
1000
1200
1400
1600
1800
2000
7/30
/02
11/1
9/02
2/26
/03
4/23
/03
6/18
/03
11/2
6/03
1/22
/04
3/18
/04
5/13
/04
9/20
/04
12/2
1/04
2/15
/05
4/12
/05
6/1/
05
1/11
/06
3/8/
06
5/3/
06
11/8
/06
1/3/
07
2/28
/07
0
200
400
600
800
1000
1200
1400
1600
11/2
8/01
1/23
/02
6/13
/02
8/8/
0212
/31/
026/
5/03
11/1
2/03
3/4/
047/
6/04
8/31
/04
10/2
6/04
1/3/
052/
28/0
54/
25/0
56/
20/0
58/
16/0
510
/14/
0512
/9/0
52/
13/0
64/
13/0
66/
29/0
68/
24/0
610
/19/
0612
/15/
062/
16/0
7
Prairie Cr. nr Ft. Ogden
Key Monitoring Locations
Symons Pump Canal Myrtle Slough
Prairie Creek WatershedSpecific Conductance Logging Results
0
200
400
600
800
1000
1200
1400
1600
1800
2000
7/30
/02
11/1
9/02
2/26
/03
4/23
/03
6/18
/03
11/2
6/03
1/22
/04
3/18
/04
5/13
/04
9/20
/04
12/2
1/04
2/15
/05
4/12
/05
6/1/
05
1/11
/06
3/8/
06
5/3/
06
11/8
/06
1/3/
07
2/28
/07
0
200
400
600
800
1000
1200
1400
1600
1800
6/4/
02
7/30
/02
1/2/
03
2/27
/03
8/20
/03
12/1
0/03
2/4/
04
4/1/
04
5/25
/04
10/2
0/04
12/1
9/04
2/13
/05
4/10
/05
6/5/
05
7/31
/05
11/1
4/05
1/9/
06
3/30
/06
11/1
/200
6
12/2
7/20
06
2/21
/200
7
Shell Creek WatershedSpecific Conductance Logging Results
0
200
400
600
800
1000
1200
1400
1600
12/8
/03
2/4/
04
3/30
/04
5/25
/04
7/20
/04
9/14
/04
11/9
/04
1/4/
05
3/1/
05
4/26
/05
6/21
/05
8/16
/05
10/1
0/05
12/4
/05
1/29
/06
3/26
/06
5/21
/06
7/21
/06
9/15
/06
11/1
0/06
1/5/
07
Shell Creek Reservoir
Key Monitoring Locations
0
200
400
600
800
1000
1200
1400
1600
1800
7/30
/02
9/24
/02
11/1
9/02
1/14
/03
3/12
/03
5/7/
037/
2/03
8/27
/03
10/2
2/03
12/1
6/03
2/10
/04
4/6/
046/
1/04
7/27
/04
9/21
/04
11/1
4/04
1/7/
053/
4/05
4/30
/05
6/25
/05
8/19
/05
10/1
6/05
12/1
2/05
2/7/
064/
4/06
5/30
/06
8/4/
069/
29/0
611
/24/
061/
19/0
7
Shell Creek @ Washington Loop Rd.
Shell Creek WatershedSpecific Conductance Logging Results
0
200
400
600
800
1000
1200
1400
1600
11/1
/03
12/2
7/03
2/21
/04
4/17
/04
6/12
/04
11/1
1/04
1/6/
05
3/3/
05
5/18
/05
7/13
/05
10/2
4/05
1/9/
06
3/6/
06
5/1/
06
11/1
/06
12/2
7/06
2/26
/07
Cypress Slough above Shell Creek
0
500
1000
1500
2000
2500
3000
2/7/
03
4/4/
03
5/30
/03
7/25
/03
11/2
6/03
1/21
/04
3/18
/04
5/13
/04
9/20
/04
12/1
6/04
2/10
/05
4/7/
05
6/2/
05
11/7
/05
1/9/
06
3/6/
06
5/1/
06
11/1
/06
12/2
7/06
2/21
/07
Shell Creek @ SR 31
Permit WUP No. Permit DID No.
Percent Improvement TDS (mg/L)
Percent Improvement
Chloride (mg/L)
20006872 66 67% 76%
20006872 76 85% 89%
0
250
500
750
1000
1250
1500
1750
2000
2250
2500
Jun-
01
Jan-
02
Dec
-02
Feb-
03
Jul-0
3
Nov
-03
Feb-
04
May
-04
Oct
-04
Feb-
05
Apr-
05
Oct
-05
Jan-
06
Apr-
06
Specific Conductance (uS/cm) Total Dissolved Solids (mg/L)Chlorides (mg/L) Sulfate (mg/L)
Back-Plugged 12/14/01
0
500
1000
1500
2000
2500
3000
3500
4000
450010
/1/0
1
12/2
4/01
3/18
/02
6/10
/02
9/2/
02
11/2
5/02
3/13
/03
7/20
/03
1/20
/04
4/28
/04
10/2
0/04
1/19
/05
4/13
/05
7/6/
05
1/29
/06
8/1/
06
1/9/
07
Sp. C
ondu
ctan
ce (u
S/cm
)Hog Bay Slough In-Situ Data Sonde Logging Results
Boy Scout Camp Non-Permitted Flowing Well
Discharge pipe from well into lakesp. conductance ~ 2400 uS/cm
Spillway located on north side of lake - flows then enter Shell Creek.
Boy Scout Camp Non-Permitted Flowing WellResults Following Resource Regulation Activities
0
100
200
300
400
500
600
1965 1969 1973 1977 1981 1985 1989 1993 1997 2001 2005
Cl (mg/L) Cl Class I Std. (250 mg/L)
Chl
orid
e C
once
ntra
tion
(mg/
L)
Shell Creek Reservoir Water Quality Results for Chloride
0
250
500
750
1000
1250
1500
1750
1965 1969 1973 1977 1981 1985 1989 1993 1997 2001 2005TDS (mg/L)TDS Class I Std. (500 mg/L monthly avg.)TDS Class I Std. (1000 mg/L max.)
Shell Creek Reservoir Water Quality Results for TDST
DS
Con
cent
ratio
n (m
g/L
)
0
10
20
30
40
50
60
RNF 420 RNF 548 RNF 523 RNF 416 RNF 533 RNF 545
Jan.-Jul. 2004Jan.-Jul. 2005Jan.-Jul. 2006
Rai
nfal
l Tot
als (
inch
es)
Precipitation Totals in SPJC Watersheds; 2004-2006
Approx. 50 % less rainfall occurred Jan. – Jul. 2006
when compared to same time period for 2005
TMDL Verified Impaired Water Segments
TDS - 500 mg/L at all timesa
TDS - 500 mg/L at all timesa,c
TDS - 1000 mg/L at all
timesb
TDS - 1000 mg/L at all timesb
Chloride - 250 mg/L at all
timesb
Chloride - 250 mg/L at all timesb
from RA Plan thru 2/2004
from 3/2004 to 7/2006 analysis
from RA Plan thru 2/2004
from 3/2004 to 7/2006 analysis
from RA Plan thru 2/2004
from 3/2004 to 7/2006 analysis
WBID 1962 Prairie Creek at Washington Loop Rd. 25.6% 8.5% 10.2% 0.0% Not Impaired No values exceed criteria Prairie Creek near Ft. Ogden (SR 31) 32.6% 7.9% 29.3% 0.0% Not Impaired No values exceed criteria
WBID 2041 Shell Creek at Washington Loop Rd. 28.8% 15.9% 5.4% 11.6% 19.7% 12.0% Shell Creek at SR 31 24.8% 12.4% 10.4% 29.8% 29.3% 26.4%
WBID 2040 Myrtle Slough at SR 31 43.4% 33.1% 16.5% 1.5% 34.6% 16.1%
Median Percent Reduction Goals and Progress to Date
a Median of individual percent reductions needed to meet Class I criteria of 500 mg/L
b Median of individual percent reductions needed to meet Class I criteria of 250 mg/L
c Some values reported as field measured or field calculated
