U. S. Army Corps of Engineers, Jacksonville District Lake Okeechobee and Vicinity Report Data Ending 2400 hours 20 APR 2008 _____________________________________________________________________________ Okeechobee Lake Regulation Elevation Last Year 2YRS Ago (ft-NGVD) (ft-NGVD) (ft-NGVD) *Okeechobee Lake Elevation 10.42 9.93 13.89 (Official Elv) Regulation Zone Elevations B= -NR- C= 16.84 D= 15.92 E= 13.85 20APR (1965-2006) Period of Record Average 13.94 Difference from POR Average -3.52 Simulated Average LORSS2007 TSP[1965-2000] 12.61 Difference from Average LORSS2007 TSP -2.19 Today Lake Okechobee elevation is determined from the 4 interior stations ++Navigation Depths (Based on 2001 Channel Condition Survey) Route 1 ÷ 4.36' Route 2 ÷ 1.76' Bridge Clearance = 53.14' ______________________________________________________________________________ 4 Interior and 4 Edge Okeechobee Lake Average (Avg-Daily values): (BAD) L001 L005 L006 LZ40 S4 S352 S308 S133 10.36 10.37 10.44 10.52 10.47 10.69 10.45 10.58 *Combination Okeechobee Avg-Daily Lake Average = 10.48 (*See Note) Interior Okeechobee Lake Average (Avg-Daily values): L001 L005 L006 LZ40 10.36 10.37 10.44 10.52 *Interior Okeechobee Avg-Daily Lake Average = 10.42 (*See Note) Okeechobee Lake Average (Avg-Daily values): (BAD) (BAD) (BAD) (BAD) (BAD) C5 S4 S3 S2 S352 S308 S135 S133 S127 S129 10.46 10.47 10.55 10.49 10.69 10.45 10.47 10.58 11.07 11.29 *Edge Okeechobee Avg-Daily Lake Average = 10.65 (*See Note) ______________________________________________________________________________ Okeechobee Inflows (cfs): S65E 1392 S191 3227 Fisheating Cr -NR- S154 0 S133 Pumps 0 S135 Pumps 0 S84 0 S127 Pumps 0 S2 Pumps 0 S71 0 S129 Pumps 0 S3 Pumps 0 S72 0 S131 Pumps 0 S4 Pumps 0 Total Inflows: 4619 Okeechobee Outflows (cfs): S135 Culverts 0 S354 -NR- S77 200 S127 Culverts -NR- S351 -NR- S308 (BAD) 0 S129 Culverts 0 S352 0 S131 Culverts L8 Canal Pt -296 C5 -NR- Total Outflows: -95 (BAD VALUE) Okeechobee Pan Evaporation (inches): S77 0.18 S308 0.25 Average Pan Evap x 0.75 Pan Coefficient = 0.16" = 0.01' Lake Average Precipitation using NEXRAD: = 0.08" = 0.01' Evaporation - Precipitation: = 0.08" = 0.01' Evaporation - Precipitation using Lake Area of 730 square miles is equal to 1595 cfs out of the lake. Lake Okeechobee (Change in Storage) Flow is -3328 cfs or -6600 AC-FT ______________________________________________________________________________ ______________________________________________________________________________ Note: Headwater, tailwater, and stage values below are instantaneous values unless otherwise specified. Headwater Tailwater ----------- Gate Positions ------------ Elevation Elevation Disch #1 #2 #3 #4 #5 #6 #7 #8 (ft-msl) (ft-msl) (cfs) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (I) see note at bottom North East Shore S133 Pumps: 12.80 10.49 0 0 0 0 0 0 (cfs) S193: ______ S191: 19.65 10.39 3227 0.0 6.6 0.0 S135 Pumps: 11.56 10.48 0 0 0 0 0 (cfs) S135 Culverts: 0 0.0 0.0 North West Shore S65E: 20.76 10.11 1392 0.5 0.5 0.3 0.4 0.4 0.4 S127 Pumps: 13.10 11.09 0 0 0 0 0 0 (cfs) S127 Culvert: -NR- -NR- S129 Pumps: 10.98 11.25 0 0 0 0 (cfs) S129 Culvert: 0 0.0 S131 Pumps: 12.35 11.58 0 0 0 (cfs) S131 Culvert: Fisheating Creek nr Palmdale ______ -NR- nr Lakeport ______ C5: ______ 10.46 -NR- -NR- -NR- -NR- South Shore S4 Pumps: 10.52 10.49 0 0 0 0 (cfs) S169: 10.49 10.72 0 0.0 0.0 0.0 S310: ______ -NR- S3 Pumps: ______ -NR- 0 0 0 0 (cfs) S354: -NR- ______ -NR- -NR- -NR- S2 Pumps: 11.14 10.54 0 0 0 0 0 (cfs) S351: 10.54 11.14 -NR- -NR- -NR- -NR- S352: 10.68 10.87 0 -NR- -NR- C10A: -NR- 10.73 -NR- -NR- 8.0 -NR- -NR- L8 Canal PT 10.86 -296 _________________________________________________________________________ Temporary Pumps S351: 11.14 10.54 -NR- -NR--NR--NR--NR--NR--NR- S352: 10.87 10.68 0 -NR--NR--NR--NR- S354: ______ -NR- -NR- -NR--NR--NR--NR- _________________________________________________________________________ Caloosahatchee River (S77, S78, S79) S47B: 10.28 10.61 0.0 0.0 S47D: 10.63 10.32 0 0.0 S77: Spillway and Sector Flow: 10.74 10.47 200 0.8 0.8 0.8 0.8 Flow Due to Lockages+: 0 S78: Spillway and Sector Flow: -NR- 4.63 -NR- 0.0 0.0 0.0 0.0 Flow Due to Lockages+: -NR- S79: Spillway and Sector Flow: 3.23 0.87 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 2 Percent of flow from S77 -NR-% Chloride (ppm) 181 St. Lucie Canal (S308, S80) S308: Spillway and Sector Flow: 10.55 10.36 0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 0 S308 Below USGS Flow Gage -41 S153: 18.86 10.31 0 -NR- 0.0 S80: Spillway and Sector Flow: 10.56 1.46 -NR- 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: -NR- Percent of flow from S308 -NR-% Steele Point Top Salinity (mg/ml) 31 Steele Point Bottom Salinity (mg/ml) 29 Speedy Point Top Salinity (mg/ml) 19 Speedy Point Bottom Salinity (mg/ml) 18 + Flow Due to lockages is computed utilizing average daily headwater and tailwater along with total number of lockages for the day to calculate a volume which is then converted to an average discharge in cfs. ______________________________________________________________________________ ----- Wind ---- Daily Precipitation Totals 1-Day 3-Day 7-Day Direction Speed (inches) (inches) (inches) (Degų) (mph) S133 Pump Station: 0.35 0.35 0.35 S193: -NR- 0.00 0.00 -NR- -NR- Okeechobee Field Station: 0.01 0.01 0.01 S135 Pump Station: 0.08 0.08 0.08 S127 Pump Station: 0.34 0.34 0.34 S129 Pump Station: 0.00 0.00 0.00 S131 Pump Station: 0.27 0.27 0.27 S77: 0.00 0.00 0.00 229 2 S78: 0.00 0.00 0.00 51 3 S79: 0.00 0.00 0.00 272 3 S4 Pump Station: -NR- 0.00 0.00 Clewiston Field Station: 0.00 0.00 0.00 S3 Pump Station: 0.00 0.00 0.00 S2 Pump Station: 0.00 0.00 0.00 S308: 0.03 0.03 0.03 20 7 S80: 0.00 0.00 0.00 52 1 Okeechobee Average 0.10 0.08 0.08 (Sites S78, S79 and S80 not included) ______________________________________________________________________________ Okeechobee Lake Elevations 20 APR 2008 10.42 Difference from 20APR08 20APR08 -1 Day = 19 APR 2008 10.44 0.02 20APR08 -2 Days = 18 APR 2008 10.42 0.00 20APR08 -3 Days = 17 APR 2008 10.40 -0.02 20APR08 -4 Days = 16 APR 2008 10.42 0.00 20APR08 -5 Days = 15 APR 2008 10.42 0.00 20APR08 -6 Days = 14 APR 2008 10.48 0.06 20APR08 -7 Days = 13 APR 2008 10.50 0.08 20APR08 -30 Days = 21 MAR 2008 10.17 -0.25 20APR08 -1 Year = 20 APR 2007 9.93 -0.49 20APR08 -2 Year = 20 APR 2006 13.89 3.47 ______________________________________________________________________________ Long Term Mean 30day Avearge ET for Lake Alfred (Inches) = 4.31 ______________________________________________________________________________ Lake Okeechobee Net Inflow (LONIN) Average Flow over the previous 14 days | Avg-Daily Flow 20APR08 Today = 20 APR 2008 -NR- MON | -NR- 20APR08 -1 Day = 19 APR 2008 -NR- SUN | -NR- 20APR08 -2 Days = 18 APR 2008 -NR- SAT | -NR- 20APR08 -3 Days = 17 APR 2008 -NR- FRI | -NR- 20APR08 -4 Days = 16 APR 2008 -NR- THU | -NR- 20APR08 -5 Days = 15 APR 2008 -NR- WED | -NR- 20APR08 -6 Days = 14 APR 2008 -NR- TUE | -NR- 20APR08 -7 Days = 13 APR 2008 -NR- MON | -NR- 20APR08 -8 Days = 12 APR 2008 -NR- SUN | -NR- 20APR08 -9 Days = 11 APR 2008 -NR- SAT | -NR- 20APR08 -10 Days = 10 APR 2008 -NR- FRI | -NR- 20APR08 -11 Days = 09 APR 2008 -NR- THU | -NR- 20APR08 -12 Days = 08 APR 2008 -NR- WED | -NR- 20APR08 -13 Days = 07 APR 2008 -NR- TUE | -NR- ______________________________________________________________________________ ______________________________________________________________________________ S65-E Average Flow over previous 14 days | Avg-Daily Flow 20APR08 Today= 20 APR 2008 1832 MON | 1392 20APR08 -1 Day = 19 APR 2008 1850 SUN | 1572 20APR08 -2 Days = 18 APR 2008 1861 SAT | 1569 20APR08 -3 Days = 17 APR 2008 1877 FRI | 1540 20APR08 -4 Days = 16 APR 2008 1932 THU | 1634 20APR08 -5 Days = 15 APR 2008 1929 WED | 1842 20APR08 -6 Days = 14 APR 2008 1888 TUE | 1876 20APR08 -7 Days = 13 APR 2008 1873 MON | 1868 20APR08 -8 Days = 12 APR 2008 1874 SUN | 1783 20APR08 -9 Days = 11 APR 2008 1875 SAT | 1822 20APR08 -10 Days = 10 APR 2008 1881 FRI | 1637 20APR08 -11 Days = 09 APR 2008 1890 THU | 2136 20APR08 -12 Days = 08 APR 2008 1836 WED | 3179 20APR08 -13 Days = 07 APR 2008 1731 TUE | 1797 ______________________________________________________________________________ Lake Okeechobee Outlets Last 14 Days S-77 S-77 S-78 S-78 Below S308 S-308 Discharge Discharge Discharge Discharge Discharge Discharge (0700-2100) (ALL DAY) (0700-2100) (ALL DAY) (ALL DAY) (ALL DAY) DATE (AC-FT) (AC-FT) (AC-FT) (AC-FT) (AC-FT) (AC-FT) 20 APR 2008 239 397 0 -NR- -81 0 19 APR 2008 192 358 0 25 -9 0 18 APR 2008 217 257 0 16 130 0 17 APR 2008 -1 10 0 12 132 1 16 APR 2008 34 -19 0 6 50 0 15 APR 2008 -218 -329 0 15 59 0 14 APR 2008 -371 -592 0 13 8 0 13 APR 2008 -319 -549 0 21 48 0 12 APR 2008 -550 -958 0 24 88 0 11 APR 2008 -635 -1224 0 9 260 63 10 APR 2008 -687 -1351 0 22 136 0 09 APR 2008 -327 -566 0 12 -83 -1 08 APR 2008 -121 -232 0 -NR- -98 -1 07 APR 2008 -114 -199 0 -NR- -38 -0 S-79 S-310 S-351 S-352 S-354 L8 Canal Pt Discharge Discharge Discharge Discharge Discharge Discharge (ALL DAY) (ALL DAY) (ALL DAY) (ALL DAY) (ALL DAY) (ALL DAY) DATE (AC-FT) (AC-FT) (AC-FT) (AC-FT) (AC-FT) (AC-FT) 20 APR 2008 4 -NR- -NR- 0 -NR- -587 19 APR 2008 4 -NR- -NR- 0 -NR- -983 18 APR 2008 4 -NR- -NR- 0 -NR- -1084 17 APR 2008 6 -NR- -NR- 0 -NR- -1073 16 APR 2008 5 -NR- -NR- 0 -NR- -1091 15 APR 2008 4 -NR- -NR- 0 -NR- -1153 14 APR 2008 227 -NR- -NR- 0 -NR- -1271 13 APR 2008 380 -NR- -NR- 0 -NR- -1237 12 APR 2008 324 -NR- -NR- 0 -NR- -1305 11 APR 2008 322 -NR- -NR- 0 -NR- -1341 10 APR 2008 674 -NR- -NR- 0 -NR- -1181 09 APR 2008 795 -NR- -NR- 0 -NR- -666 08 APR 2008 2361 -NR- -NR- 0 -NR- -996 07 APR 2008 1695 -NR- -NR- 0 -NR- -1446 *** NOTE: 1) Discharge from (0700-2100) is computed using Spillway and Sector Gate Discharges from 0700 hrs to 2100 hrs. 2) Discharge (ALL DAY) is computed using Spillway, Sector Gate and Lockages Discharges from 0015 hrs to 2400 hrs. ______________________________________________________________________________ (I) - Flows preceeded by "I" signify an instantaneous flow computed from the single value reported for the day ______________________________________________________________________________ * As of 11 May 1999, Lake Okeechobee Elevation was switched from Instantaneous 2400 value to an average-daily lake average. On 14 Mar 2001, due to the isolation of various gages within the standard 10 stations, we began using the average of the interior 4 station gages as the official Lake Okeechobee Elevation. * On 16 April 2007, Lake Okeechobee Elevation was switched to a 8 gage mixture of interior and exterior gages due to wind effects on Lake O (When the 4 station gages are not working the 10 station elevation is used) Today Lake Okechobee elevation is determined from the 4 interior stations ++ For more information see the Jacksonville District Navigation website at http://www.saj.usace.army.mil/hydroSurvey/hydro.htm $ For information regarding Lake Okeechobee Service Area water restrictions please refer to www.sfwmd.gov ______________________________________________________________________________ Report Generated 21APR2008 @ 13:15 ** Preliminary Data - Subject to Revision **