U. S. Army Corps of Engineers, Jacksonville District Lake Okeechobee and Vicinity Report Data Ending 2400 hours 11 MAY 2008 _____________________________________________________________________________ Okeechobee Lake Regulation Elevation Last Year 2YRS Ago (ft-NGVD) (ft-NGVD) (ft-NGVD) *Okeechobee Lake Elevation 10.03 9.33 13.02 (Official Elv) Regulation Zone Elevations B= -NR- C= 16.67 D= 15.72 E= 13.67 11MAY (1965-2006) Period of Record Average 13.44 Difference from POR Average -3.41 Simulated Average LORSS2007 TSP[1965-2000] 12.14 Difference from Average LORSS2007 TSP -2.11 Today Lake Okechobee elevation is determined from the 4 interior stations ++Navigation Depths (Based on 2001 Channel Condition Survey) Route 1 ÷ 3.97' Route 2 ÷ 1.37' Bridge Clearance = 53.58' ______________________________________________________________________________ 4 Interior and 4 Edge Okeechobee Lake Average (Avg-Daily values): (BAD) L001 L005 L006 LZ40 S4 S352 S308 S133 10.06 9.87 10.04 10.16 9.85 10.42 10.27 10.28 *Combination Okeechobee Avg-Daily Lake Average = 10.12 (*See Note) Interior Okeechobee Lake Average (Avg-Daily values): L001 L005 L006 LZ40 10.06 9.87 10.04 10.16 *Interior Okeechobee Avg-Daily Lake Average = 10.03 (*See Note) Okeechobee Lake Average (Avg-Daily values): (BAD) (BAD) (BAD) (BAD) (BAD) C5 S4 S3 S2 S352 S308 S135 S133 S127 S129 9.76 9.85 10.13 10.11 10.42 10.27 10.05 10.28 10.85 10.31 *Edge Okeechobee Avg-Daily Lake Average = 10.20 (*See Note) ______________________________________________________________________________ Okeechobee Inflows (cfs): S65E 1168 S191 -NR- Fisheating Cr -NR- S154 -NR- 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: 1168 Okeechobee Outflows (cfs): S135 Culverts 0 S354 -NR- S77 381 S127 Culverts -NR- S351 -NR- S308 (BAD) 0 S129 Culverts 0 S352 330 S131 Culverts L8 Canal Pt 0 C5 -NR- Total Outflows: 712 (BAD VALUE) Okeechobee Pan Evaporation (inches): S77 0.38 S308 0.30 Average Pan Evap x 0.75 Pan Coefficient = 0.25" = 0.02' Lake Average Precipitation using NEXRAD: = 0.00" = 0.00' Evaporation - Precipitation: = 0.25" = 0.02' Evaporation - Precipitation using Lake Area of 730 square miles is equal to 5005 cfs out of the lake. Lake Okeechobee (Change in Storage) Flow is -7058 cfs or -14000 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: 12.08 10.44 0 0 0 0 0 0 (cfs) S193: ______ S191: 19.00 10.33 -NR- 0.0 -NR- 0.0 S135 Pumps: 10.05 10.03 0 0 0 0 0 (cfs) S135 Culverts: 0 0.0 0.0 North West Shore S65E: 20.72 9.74 1168 0.5 0.5 0.5 0.4 0.4 0.4 S127 Pumps: 12.34 -NR- 0 0 0 0 0 0 (cfs) S127 Culvert: -NR- -NR- S129 Pumps: 10.32 10.30 0 0 0 0 (cfs) S129 Culvert: 0 0.0 S131 Pumps: 11.80 10.45 0 0 0 (cfs) S131 Culvert: Fisheating Creek nr Palmdale ______ -NR- nr Lakeport ______ C5: ______ 9.76 -NR- -NR- -NR- -NR- South Shore S4 Pumps: 9.72 9.80 0 0 0 0 (cfs) S169: 9.80 9.90 0 0.0 0.0 0.0 S310: ______ -NR- S3 Pumps: ______ -NR- 0 0 0 0 (cfs) S354: -NR- ______ -NR- -NR- -NR- S2 Pumps: 10.53 10.07 0 0 0 0 0 (cfs) S351: 10.07 10.53 -NR- -NR- -NR- -NR- S352: ______ -NR- 330 -NR- -NR- C10A: -NR- 10.31 -NR- -NR- 8.0 -NR- -NR- L8 Canal PT 10.39 0 _________________________________________________________________________ Temporary Pumps S351: 10.53 10.07 -NR- -NR--NR--NR--NR--NR--NR- S352: -NR- ______ 330 -NR--NR--NR--NR- S354: ______ -NR- -NR- -NR--NR--NR--NR- _________________________________________________________________________ Caloosahatchee River (S77, S78, S79) S47B: 9.56 9.51 0.5 0.5 S47D: 9.52 9.55 0 0.0 S77: Spillway and Sector Flow: 10.71 9.70 380 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 1 S78: Spillway and Sector Flow: 9.66 3.26 33 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 12 S79: Spillway and Sector Flow: 3.23 1.85 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 1 Percent of flow from S77 -NR-% Chloride (ppm) 225 St. Lucie Canal (S308, S80) S308: Spillway and Sector Flow: 10.41 9.92 0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 0 S308 Below USGS Flow Gage -20 S153: 18.50 9.81 0 -NR- 0.0 S80: Spillway and Sector Flow: 10.29 -0.58 0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Flow Due to Lockages+: 6 Percent of flow from S308 -NR-% Steele Point Top Salinity (mg/ml) 31 Steele Point Bottom Salinity (mg/ml) 30 Speedy Point Top Salinity (mg/ml) 21 Speedy Point Bottom Salinity (mg/ml) 23 + 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: -NR- 0.00 0.68 S193: -NR- 0.00 0.00 -NR- -NR- Okeechobee Field Station: -NR- 0.00 0.18 S135 Pump Station: -NR- 0.00 0.64 S127 Pump Station: -NR- 0.00 0.26 S129 Pump Station: -NR- 0.00 0.29 S131 Pump Station: -NR- 0.00 0.00 S77: 0.00 0.00 0.01 191 5 S78: 0.01 0.01 1.27 76 5 S79: 0.00 0.00 0.00 253 11 S4 Pump Station: -NR- 0.00 0.00 Clewiston Field Station: -NR- 0.00 0.00 S3 Pump Station: -NR- 0.00 0.00 S2 Pump Station: -NR- 0.00 0.00 S308: 0.00 0.00 1.79 355 20 S80: 0.00 0.00 0.00 55 7 Okeechobee Average 0.00 0.00 0.30 (Sites S78, S79 and S80 not included) ______________________________________________________________________________ Okeechobee Lake Elevations 11 MAY 2008 10.03 Difference from 11MAY08 11MAY08 -1 Day = 10 MAY 2008 10.07 0.04 11MAY08 -2 Days = 09 MAY 2008 10.10 0.07 11MAY08 -3 Days = 08 MAY 2008 10.09 0.06 11MAY08 -4 Days = 07 MAY 2008 10.08 0.05 11MAY08 -5 Days = 06 MAY 2008 10.09 0.06 11MAY08 -6 Days = 05 MAY 2008 10.11 0.08 11MAY08 -7 Days = 04 MAY 2008 10.15 0.12 11MAY08 -30 Days = 11 APR 2008 10.54 0.51 11MAY08 -1 Year = 11 MAY 2007 9.33 -0.70 11MAY08 -2 Year = 11 MAY 2006 13.02 2.99 ______________________________________________________________________________ Long Term Mean 30day Avearge ET for Lake Alfred (Inches) = 4.85 ______________________________________________________________________________ Lake Okeechobee Net Inflow (LONIN) Average Flow over the previous 14 days | Avg-Daily Flow 11MAY08 Today = 11 MAY 2008 -NR- MON | -NR- 11MAY08 -1 Day = 10 MAY 2008 -NR- SUN | -NR- 11MAY08 -2 Days = 09 MAY 2008 -NR- SAT | -NR- 11MAY08 -3 Days = 08 MAY 2008 -NR- FRI | -NR- 11MAY08 -4 Days = 07 MAY 2008 -NR- THU | -NR- 11MAY08 -5 Days = 06 MAY 2008 -NR- WED | -NR- 11MAY08 -6 Days = 05 MAY 2008 -NR- TUE | -NR- 11MAY08 -7 Days = 04 MAY 2008 -NR- MON | -NR- 11MAY08 -8 Days = 03 MAY 2008 -NR- SUN | -NR- 11MAY08 -9 Days = 02 MAY 2008 -NR- SAT | -NR- 11MAY08 -10 Days = 01 MAY 2008 -NR- FRI | -NR- 11MAY08 -11 Days = 30 APR 2008 -NR- THU | -NR- 11MAY08 -12 Days = 29 APR 2008 -NR- WED | -NR- 11MAY08 -13 Days = 28 APR 2008 -NR- TUE | -NR- ______________________________________________________________________________ ______________________________________________________________________________ S65-E Average Flow over previous 14 days | Avg-Daily Flow 11MAY08 Today= 11 MAY 2008 809 MON | 1168 11MAY08 -1 Day = 10 MAY 2008 795 SUN | 558 11MAY08 -2 Days = 09 MAY 2008 826 SAT | 688 11MAY08 -3 Days = 08 MAY 2008 862 FRI | 943 11MAY08 -4 Days = 07 MAY 2008 882 THU | 830 11MAY08 -5 Days = 06 MAY 2008 929 WED | 698 11MAY08 -6 Days = 05 MAY 2008 984 TUE | 767 11MAY08 -7 Days = 04 MAY 2008 1027 MON | 641 11MAY08 -8 Days = 03 MAY 2008 1080 SUN | 638 11MAY08 -9 Days = 02 MAY 2008 1147 SAT | 640 11MAY08 -10 Days = 01 MAY 2008 1214 FRI | 859 11MAY08 -11 Days = 30 APR 2008 1262 THU | 1386 11MAY08 -12 Days = 29 APR 2008 1279 WED | 794 11MAY08 -13 Days = 28 APR 2008 1354 TUE | 716 ______________________________________________________________________________ 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) 11 MAY 2008 497 756 0 89 -39 0 10 MAY 2008 572 986 156 288 -40 0 09 MAY 2008 722 1200 153 267 52 28 08 MAY 2008 660 1103 156 277 385 73 07 MAY 2008 552 921 156 -NR- 56 34 06 MAY 2008 519 873 0 8 157 50 05 MAY 2008 429 723 0 91 207 2 04 MAY 2008 -NR- -NR- -NR- -NR- 62 -NR- 03 MAY 2008 -NR- -NR- -NR- -NR- 503 -NR- 02 MAY 2008 -NR- -NR- -NR- -NR- -NR- -NR- 01 MAY 2008 484 -NR- 138 -NR- -NR- -NR- 30 APR 2008 550 816 134 268 14 1 29 APR 2008 117 162 86 122 7 1 28 APR 2008 14 135 0 -NR- 285 1 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) 11 MAY 2008 3 -NR- -NR- 654 -NR- 1 10 MAY 2008 5 -NR- -NR- 654 -NR- -21 09 MAY 2008 3 -NR- -NR- 654 -NR- 9 08 MAY 2008 2 -NR- -NR- 654 -NR- 87 07 MAY 2008 -NR- -NR- -NR- 654 -NR- 20 06 MAY 2008 4 -NR- -NR- 644 -NR- 3 05 MAY 2008 3 -NR- -NR- 654 -NR- 21 04 MAY 2008 -NR- -NR- -NR- 654 -NR- -8 03 MAY 2008 -NR- -NR- -NR- 654 -NR- -13 02 MAY 2008 -NR- -NR- -NR- -NR- -NR- -NR- 01 MAY 2008 -NR- -NR- -NR- 654 -NR- -NR- 30 APR 2008 5 -NR- -NR- 545 -NR- 45 29 APR 2008 3 -NR- -NR- 696 -NR- 41 28 APR 2008 3 -NR- -NR- 527 -NR- 15 *** 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 12MAY2008 @ 14:15 ** Preliminary Data - Subject to Revision **