January 8, 2004 memorandum
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MEMORANDUM TO: File FROM: Doug Leeper, Senior Environmental Scientist Resource Conservation and Development Department Southwest Florida Water Management District SUBJECT: Proposed minimum and guidance levels for Lake Lindsey in Hernando County, Florida Lake Lindsey General Description
Lake Lindsey (Figure 1) is located in the Withlacoochee River Basin in Hernando County, Florida (Sections 25 and 26, Township 21S, Range 19E). The area surrounding the lake is categorized as the Brooksville Hills subdivision of the Ocala Uplift Physiographic District (Brooks 1981). The subdivision is an area of "very high hills capped by Lower Miocene clay" and separated by karst and sandhills. As part of the Florida Department of Environmental Protection’s Lake Bioassessment/Regionalization Initiative, the area has been identified as the Southern Brooksville Ridge lake region and described as an area of thick sand hills overlying limestone, with slightly colored, mostly neutral to alkaline (some are acidic), mesotrophic or meso-eutrophic lakes (Griffith et al. 1997).
The drainage area for Lake Lindsey is 3 square miles (Florida Board of Conservation 1969).
ditch and two wells, serves as an outlet for the lake (Figure 2). Little of the lake shoreline has been cleared for residential development. A public boat ramp along the eastern shore of the lake is maintained by the Hernando County Government. There are no surface water withdrawals from the lake currently permitted by the District. There are, however, a few permitted groundwater withdrawals in the area.
The "Gazetteer of Florida Lakes" (Florida Board of Conservation 1969, Shafer et al. 1986) lists the lake area as 137 acres at a surface elevation of 65 ft above the National Geodetic Vertical Datum of 1929 (NGVD).
The 1954 (photorevised 1988) United States Geological Survey 1:24,000 Nobleton and Brooksville SE, Fla. quadrangle maps do not provide a surface water elevation for the lake. The 65 ft elevation listed in the "Gazetteer of Florida Lakes" corresponds to a lake surface area of 86 acres, based on a
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topographic map of the basin generated in support of minimum levels development (Figure 3). Data used for production of the topographic map were obtained from field surveys conducted in March 2003 and 1:200 aerial photograph maps containing one- foot contour lines prepared using photogrammetric methods .
Figure 1. Location of Lake Lindsey in Hernando County, Florida. 0 10 20 Miles ¯
Lake Lindsey DRAFT
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hydrologic indicators were measured at Lake Lindsey in Hernando County, Florida. Boat Ramp # Hydrologic Indicators G 0 1,000 2,000 Feet
Aerial photography from 1999 USGS Digital Orhtophotograph. Map prepared September 18, 2003 ¯ Outlet Lake gauge E ! . ! . G G E # DRAFT
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Florida. Values shown are elevations in feet above the National Geodetic Vertical Datum of 1929.
0 500 1,000 Feet
Map prepared June 9, 2003 using 1999 USGS digital orthophotography, elevation data from 1990 SWFWMD aerial photography with contours maps (Sheet Nos. 25-21-19 and 26-21-19), and elevation data collected on March 11, 2003 by SWFWMD Staff. ¯ 68 67 70 69 66 65 64 6 1 71 63 59 62 73 6 0 72 5 9 66 6 7 66 61 7 0 6 9 68 6 0 69 59 7 0 73 67 71 69 72 63 71 69 62 6 7 72 70 7 0 6 3 65 5 9 69 64 6 3 6 8 67 71 71 5 9 60 6 2 6 2 64 73 7 2 73 73 65 71 7 2 73 61 65 62 73 63 73 70 66 72 73 64 6 3 7 2 63 70 7 2 65 72 64 7 3 6 2 63 71 7 3 60 73 6 6 6 0 71 62 73 68 68 74 74 74 74 74 74 74 74 74 DRAFT
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Based on work conducted in the 1980s (see SWFWMD 1996), the District Governing Board adopted management levels (currently referred to as Guidance Levels) for Lake Lindsey in February 1986 (Table 1). A Maximum Desirable Level of 68.50 ft above NGVD was also developed, but was not adopted by the Governing Board .
in Hernando County, Florida.
Elevation (feet above NGVD) Total Lake Area (acres) Ten Year Flood Guidance Level 70.60 152
High Level 69.00
138 Low Level 66.00 96
Extreme Low Level 64.50
81
Proposed Minimum and Guidance Levels
Proposed Minimum and Guidance Levels were developed for Lake Lindsey using the methodology for Category 1 and 2 Lakes described in SWFWMD (1999) and current District Rules (Chapter 40-D8, Florida Administrative Code). Additional lake-level information was developed using methods outlined in Leeper et al. (2001), in accordance with modifications outlined by Dierberg and Wagner (2001). Proposed levels, along with lake surface area values for each level are listed in Table 2. Contour lines corresponding the proposed minimum level elevations are shown within the basin in Figure 4.
Table 2. Proposed minimum levels, guidance levels and associated surface areas for Lake Lindsey in Hernando County, Florida.
Elevation (feet above NGVD) Lake Area (acres) Ten Year Flood Guidance Level 72.4 166
High Guidance Level 68.5
131 High Minimum Lake Level 68.5 131
Minimum Lake Level 66.1
97 Low Guidance Level 63.9 76
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proposed High Minimum Lake Level (blue) for Lake Lindsey in Hernando County, Florida. Elevations of contours are in feet above the National Geodetic Vertical Datum of 1929. Legend CONTOUR 66.1 ft above NGVD 68.5 ft above NGVD 0 500 1,000 Feet
Map prepared June 9, 2003 using 1999 USGS digital orthophotography, elevation data from 1990 SWFWMD aerial photography with contours maps (Sheet Nos. 25-21-9 and 26-21-19), and elevation data collected on March 11, 2003 by SWFWMD Staff. ¯
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Guidance Levels Hydrologic data are available for Lake Lindsey (District Universal ID Number STA 531 533) from January 1965 through September 1968, from May 1982 through March 1983, from November 1984, and from February 1985 to the present date (Figure 5, see Figure 2 for current location of the SWFWMD lake-level gauge). Monthly mean water surface elevations, along with proposed guidance and minimum levels, are shown in Figure 6.
For the entire period of record, the hydrologic data are classified as Historic data. Historic data collected through February 2003 were used to calculate the Historic P10, P50, and P90 (Table 3).
points on cypress (Taxodium sp) buttresses along the south shore of the lake (Table 4, Figure 2). The low floor slab elevation, extent of structural alteration and the control point elevation were determined using available one-foot contour interval aerial maps and field survey data (Table 3, Figure 7). The Normal Pool elevation is below the control point, so the lake is not considered to be Structurally Altered.
Based on the availability of Historic hydrologic data for the lake basin, the High Guidance Level was established at the Historic P10 elevation of 68.5 ft above NGVD (Table 3). The Historic P50 (66.1 ft above NGVD) and Low Guidance Level (63.9 ft above NGVD) were also established using Historic hydrologic data.
The Ten Year Flood Guidance Level for Lake Lindsey was established at 72.4 ft NGVD using the methodology for closed basin lakes described in current District Rules (Chapter 40D-8, Florida Administrative Code). In accordance with the closed-basin methodology, the 10-year flood level was based on frequency analysis of available lake stage data and stage values derived from a HSPF (Hydrologic Simulation Program Fortran) continuous simulation model. Inputs to the model included standard watershed parameters (basin size, slope, infiltration rate, ground water recession rate, etc.) and rainfall records from the Brooksville National Weather Service site for the period from 1950 through 2003.
The Ten Year Flood Guidance Level has not been exceeded during the period for which lake stage data are available (see Figure 5).
The highest surface elevation for Lake Lindsey included in the District Water Management Database, 70.15 ft above NGVD, occurred on August 13, 1965 . The low of record, 62.20 ft above NGVD, occurred on May 25, 1994.
Lake Lindsey contains diverse stands of aquatic macrophytes and other hydrophytes, including cattail (Typha sp.), pickerelweed (Pontederia cordata), panic grass (Panicum sp.), water fern (Salvinia sp.), pennywort (Hydrocotyle umbellata), spatterdock (Nuphar luteum), fragrant water lily (Nymphaea odorata), arrowhead (Sagittaria sp.) and willow (Salix sp.). The lake is also contiguous with cypress-dominated (Taxodium sp.) wetlands greater than 0.5 acre in size, so it is classified as a Category 1 or 2 Lake for the purpose of minimum levels development. Because the Historic P50 elevation is more than 1.8 DRAFT
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feet below the Normal Pool elevation, the lake is classified as a Category 2 Lake. Note that herein, for discussion purposes, the elevation 1.8 ft below the Normal Pool elevation is identified as the Cypress Standard. For Lake Lindsey this standard is established at 66.2 ft above NGVD. Based on the relationship between the Cypress Standard and the Historic P50 elevation, the proposed Minimum Lake Level was established at the Historic P50 elevation (66.1 ft above NGVD). The proposed High Minimum Lake Level was established at 68.5 ft above NGVD, an elevation corresponding to the High Guidance Level. The proposed High Minimum Lake Level is 5.8 ft below the Low Floor Slab elevation, 4.3 ft below the slab of a garage located below the low floor slab, and 4.0 ft below a basketball court located near the lakeshore.
For comparative purposes, minimum level standards used for establishing Minimum Lake Levels for lakes without fringing cypress wetlands were developed for Lake Lindsey (Table 3). The Species Richness Standard would be established at 64.7 ft above NGVD, based on limiting reduction in lake surface area to less than a 15% reduction from the lake area at the Historic P50 elevation. The Aesthetic Standard for the lake would be established at the Low Guidance Level elevation of 63.9 ft above NGVD. Based on potential resuspension of sediments, the Mixing Standard would be established at 61.4 ft above NGVD. For Lake Lindsey a Recreation/Ski Standard would be established at 67.2 ft above NGVD, based on the elevation within the basin that could contain an area suitable for safe skiing (65 ft above NGVD) and the difference between the Historic P50 and Historic P90 (2.2 ft). However, because this standard is greater than the Historic P50 elevation, use of the standard would not be appropriate. Similarly, development of a Dock-Use Standard would not be appropriate for the lake, as only a single dock was observed within the basin during site visits to the lake in 2002 and 2003.
Review of changes in potential herbaceous wetland area associated with change in lake stage did not indicate that use of any of the identified standards would be inappropriate for minimum levels development (Figure 8).
.
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shown. 62 63 64 65 66 67 68 69 70 71 72 73 1960 1970 1980 1990 2000 2010 Water Elevation (ft above NG VD) Lake Lindsey (Hernando County) SWFWMD UID = STA 531 533 DRAFT
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Hernando County, Florida. Proposed levels include the Ten Year Flood Guidance Level (10-YR), High Guidance Level (HGL), Low Guidance Level (LGL), High Minimum Lake Level (HMLL), and Minimum Lake Level (MLL). 62 63 64 65 66 67 68 69 70 71 72 73 1960 1970 1980 1990 2000 2010 Water Elevatio n (ft ab o ve NGVD) MLL 10-YR LGL Lake Lindsey (Hernando County) SWFWMD UID = STA 531 533 HGL, HHML DRAFT
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levels for Lake Lindsey in Hernando County, Florida.
Elevation (feet above NGVD) Lake Area (acres) Historic P10 68.46 131
Historic P50 66.13
97 Historic P90 63.93 76
Normal Pool 68.0
124 Low Floor Slab 74.28 NA
Low Other (garage slab) 72.78
NA Low Other (basketball court) 72.49 NA
Low Other (top of paved public boat ramp) 70.8 153 Low Other (bottom of paved public boat ramp) 62.4 59
Low Road 74.43
NA Control Point 72.5 166
High Guidance Level 68.5
131 Historic P50 66.1 97
Low Guidance Level 63.9
76
Cypress Standard 66.2 98
Species Richness Standard 64.7
83 Aesthetic Standard 63.9 76
Mixing Standard 61.4
49 NA = not available DRAFT
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Lindsey in Hernando County, Florida. Data were based on field observations at two sites by SWFWMD staff in March 2003.
Elevation (feet above NGVD) Cypress buttress
66.92
Cypress buttress
66.94 Cypress buttress
67.35 Cypress buttress
67.66 Cypress buttress
67.76 Cypress buttress
67.98 Cypress buttress
68.58 Cypress buttress
68.68 Cypress buttress
68.72 Cypress buttress
68.76 Cypress buttress
69.38 N 11 Median 68.0 Mean 68.1 Standard Deviation 0.8
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Figure 7. Outlet conveyance system for Lake Lindsey in Hernando County, Florida. Green line shows location of open ditch. Site Description Elevation (feet above NGVD) 1 Control point; high spot in open ditch 72.5 2 Dry well Not available 3
Dry well Not available
Aerial photography from 1999 U SGS Digital Orhtophotograph. Map prepared June 9, 2003 0 500
1,000 Feet
¯ Lake Lindsey 1 2 3 DRAFT 14 of 16
Figure 8. Surface area, volume, dynamic ratio, potential herbaceous wetland area, and area available for macrophyte colonization versus lake stage for Lake Lindsey in Hernando County, Florida.
Stage and Area 55 60
70 75 0 50 100
150 200
Acres La k e S tage ( ft N G V D ) Stage and Volume 55 60
70 75 0.0E+0 0 2.0E+0
7 4.0E+0
7 6.0E+0
7 8.0E+0
7 Cubic ft
Lak e S
tage (f t N G V D ) Stage and Herbaceous Wetland Area 55 60
70 75 0 10 20 30 40 50 60 Acres<4 Ft Deep Lak
e S tage (
ft N G V D ) Stage and Dynamic Ratio 55 60 65 70 75 0.0 2.0
4.0 6.0
8.0 Value
Lak e S
tage ( ft N G V D ) Stage and Area Available for Aquatic Plant Colonization 55 60 65 70 75 0 25 50 75 100
125 Acres <9.4 Ft Deep La k
S tage (
ft N G V D ) DRAFT 15 of 16
Documents Cited and Reviewed for Development of Proposed Guidance and Minimum Levels
Brenner, M. and Binford, M.W. 1988. Relationship between concentrations of sedimentary variables and trophic state in Florida lakes. Canadian Journal of Fisheries and Aquatic Sciences 45: 294-300.
Brooks, H. K. 1981. Physiographic divisions of Florida: map and guide. Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida.
January 12, 2003. St. Petersburg, Florida.
DeWitt, D. Date Unknown. A drying time? St. Petersburg Times. St. Petersburg, Florida.
Dierberg, F. E. and Wagner, K. J. 2001. A review of “A multiple-parameter approach for establishing minimum levels for Category 3 Lakes of the Southwest Florida Water Management District” June 2001 draft by D. Leeper, M. Kelly, A. Munson, and R. Gant. Prepared for the Southwest Florida Water Management District. Brooksville, Florida .
Florida Board of Conservation. 1969. Florida lakes, part III: gazetteer. Division of Water Resources. Tallahassee, Florida.
Griffith, G., Canfield, D., Jr., Horsburgh, C., Omernik, and J. Azevedo, S. 1997. Lake regions of Florida (map). United States Environmental Protection Agency, University of Florida Institute of Food and Agricultural Sciences, Florida Lakewatch, Florida Department of Environmental Protection, and the Florida Lake Management Society. Gainesville and Tallahassee, Florida.
Leeper, D., Kelly, M., Munson, A. and Gant, R. 2001. A multiple-parameter approach for establishing minimum levels for Category 3 Lakes of the Southwest Florida Water Management District, June14, 2001 draft. Southwest Florida Water Management District. Brooksville, Florida.
Romie, K. 2000. Water chemistry of lakes in the Southwest Florida Water Management District. Southwest Florida Water Management District, Brooksville, Florida.
Shafer, M. D., Dickinson, R. E., Heaney, J. P., and Huber, W. C. 1986. Gazetteer of Florida lakes. Publication no. 96, Water Resources Research Center, University of Florida. Gainesville, Florida.
Southwest Florida Water Management District. 1990. Coastal Rivers and Withlacoochee River Basins, Chinsegut, aerial photography with contours. Sheet No. 25-21-19. Brooksville, Florida. Prepared by Lowe Engineering, Inc., Atlanta, Georgia. DRAFT 16 of 16
Southwest Florida Water Management District. 1990. Coastal Rivers and Withlacoochee River Basins, Chinsegut, aerial photography with contours. Sheet No. 26-21-19. Brooksville, Florida. Prepared by Lowe Engineering, Inc., Atlanta, Georgia.
Southwest Florida Water Management District. 1990. Coastal Rivers and Withlacoochee River Basins, Chinsegut, aerial photography with contours. Sheet No. 25-21-19. Brooksville, Florida. Prepared by Lowe Engineering, Inc., Atlanta, Georgia.
Southwest Florida Water Management District. 1996. Lake Levels Program lake data sheets / 1977-1996, Withlacoochee River Basin – 19. Brooksville, Florida.
Southwest Florida Water Management District. 1999. Establishment of minimum levels for Category 1 and Category 2 lakes, in Northern Tampa Bay minimum flows and levels white papers: white papers supporting the establishment of minimum flows and levels for isolated cypress wetlands, Category 1 and 2 lakes, seawater intrusion, environmental aquifer levels, and Tampa Bypass Canal; peer-review final draft, March 19, 1999. Brooksville, Florida.
Southwest Florida Water Management District. 2000. Specific purpose survey, Section 25, Township 21 South, Range 19 East, Hernando County, Lake Lindsey Minimum Flows and Levels. Drawing No. 19-000-566. Southwest Florida Water Management District, Brooksville, Florida.
Southwest Florida Water Management District. 2002. Survey Section Field Book 19/154, pages 39-43. Southwest Florida Water Management District, Brooksville, Florida.
United States Geological Survey. 1954. Brooksville, SE quadrangle, Florida-Hernando County, 7.5 minute series (topographic) map; Brooksville SE, Fla., 28082-E3-TF-024, 1954, Photorevised 1988, DMA 4541 III SE-Series V847. Department of Interior. Washington, D.C.
United States Geological Survey. 1954. Nobleton quadrangle, Florida, 7.5 minute series (topographic) map; Nobleton, Fla., 28082-F3-TF-024, 1954, Photorevised 1988, DMA 4541 III NE-Series V847. Department of Interior. Washington, D.C.
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