U. S. Army Corps of Engineers, Jacksonville District Lake Okeechobee and Vicinity Report Data Ending 2400 hours 12 APR 2009 _____________________________________________________________________________ Okeechobee Lake Regulation Elevation Last Year 2YRS Ago (ft-NGVD) (ft-NGVD) (ft-NGVD) *Okeechobee Lake Elevation 11.81 10.51 10.07 (Official Elv) Bottom of High Lake Mngmt= 17.02 Top of Water Short Mngmt= 11.40 Currently in Operational Management Band 12APR (1965-2007) Period of Record Average 14.05 Difference from POR Average -2.24 Simulated Average LORS2008 [1965-2000] 12.80 Difference from Average LORS2008 -0.99 Today Lake Okechobee elevation is determined from the 4 interior stations ++Navigation Depths (Based on 2001 Channel Condition Survey) Route 1 ÷ 5.75' Route 2 ÷ 3.15' Bridge Clearance = 52.00' ______________________________________________________________________________ 4 Interior and 4 Edge Okeechobee Lake Average (Avg-Daily values): L001 L005 L006 LZ40 S4 S352 S308 S133 11.64 11.85 11.81 11.95 11.85 12.03 11.78 11.73 *Combination Okeechobee Avg-Daily Lake Average = 11.83 (*See Note) Interior Okeechobee Lake Average (Avg-Daily values): L001 L005 L006 LZ40 11.64 11.85 11.81 11.95 *Interior Okeechobee Avg-Daily Lake Average = 11.81 (*See Note) Okeechobee Lake Average (Avg-Daily values): (BAD) (BAD) C5 S4 S3 S2 S352 S308 S135 S133 S127 S129 11.70 11.85 11.99 11.89 12.03 11.78 11.67 11.73 11.77 11.63 *Edge Okeechobee Avg-Daily Lake Average = 11.80 (*See Note) ______________________________________________________________________________ Okeechobee Inflows (cfs): S65E 220 S191 0 Fisheating Cr -NR- S154 -NR- S133 Pumps -NR- 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: 220 Okeechobee Outflows (cfs): S135 Culverts 0 S354 553 S77 1530 S127 Culverts 0 S351 746 S308 127 S129 Culverts 0 S352 187 S131 Culverts L8 Canal Pt 71 C5 -NR- Total Outflows: 3214 Okeechobee Pan Evaporation (inches): S77 0.25 S308 0.30 Average Pan Evap x 0.75 Pan Coefficient = 0.21" = 0.02' Lake Average Precipitation using NEXRAD: = -NR-" = -NR-' Evaporation - Precipitation: = -NR-" = -NR-' Evaporation - Precipitation using Lake Area of 730 square miles is equal to -NR- Lake Okeechobee (Change in Storage) Flow is -3529 cfs or -7000 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: 11.99 11.78 -NR- 0 0 0 0 -NR- (cfs) S193: ______ S191: 18.86 11.75 0 0.0 0.0 0.0 S135 Pumps: 11.41 11.63 0 0 0 0 0 (cfs) S135 Culverts: 0 0.0 0.0 North West Shore S65E: 20.88 11.69 220 0.1 0.1 0.1 0.1 0.1 0.1 S127 Pumps: 12.06 11.78 0 0 0 0 0 0 (cfs) S127 Culvert: 0 0.0 S129 Pumps: 11.76 11.59 0 0 0 0 (cfs) S129 Culvert: 0 0.0 S131 Pumps: 11.95 12.16 0 0 0 (cfs) S131 Culvert: Fisheating Creek nr Palmdale ______ -NR- nr Lakeport ______ C5: ______ 11.70 -NR- -NR- -NR- -NR- South Shore S4 Pumps: 10.93 11.82 0 0 0 0 (cfs) S169: 11.86 11.15 127 2.0 2.0 1.5 S310: ______ -NR- S3 Pumps: 11.42 11.85 0 0 0 0 (cfs) S354: 11.85 11.42 553 2.2 2.2 S2 Pumps: 11.37 11.75 0 0 0 0 0 (cfs) S351: 11.75 11.37 746 2.9 2.9 2.8 S352: 11.94 11.30 187 0.6 0.9 C10A: -NR- 11.63 -NR- -NR- 7.0 -NR- -NR- L8 Canal PT 11.68 71 _________________________________________________________________________ Temporary Pumps S351: 11.37 11.75 746 -NR--NR--NR--NR--NR--NR- S352: 11.30 11.94 187 -NR--NR--NR--NR- S354: 11.42 11.85 553 -NR--NR--NR--NR- _________________________________________________________________________ Caloosahatchee River (S77, S78, S79) S47B: 11.07 10.63 1.5 1.5 S47D: 10.63 10.57 0 0.0 S77: Spillway and Sector Flow: 11.63 10.76 1528 4.0 4.0 4.0 4.0 Flow Due to Lockages+: 2 S77 Below USGS Flow Gage -NR- (TESTING) S78: Spillway and Sector Flow: 10.69 3.19 1247 1.0 1.5 1.5 1.0 Flow Due to Lockages+: 11 S79: Spillway and Sector Flow: 3.03 0.79 1701 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Flow Due to Lockages+: 13 Percent of flow from S77 90% Chloride (ppm) 157 St. Lucie Canal (S308, S80) S308: Spillway and Sector Flow: 11.65 11.50 127 0.0 2.5 0.0 0.0 Flow Due to Lockages+: 0 S308 Below USGS Flow Gage 182 S153: 18.71 11.44 0 0.0 0.0 S80: Spillway and Sector Flow: -NR- -NR- -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) 33 Steele Point Bottom Salinity (mg/ml) 29 Speedy Point Top Salinity (mg/ml) 23 Speedy Point Bottom Salinity (mg/ml) 25 + 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: 0.00 0.00 0.00 S193: -NR- 0.00 0.00 -NR- -NR- Okeechobee Field Station: 0.00 0.00 0.00 S135 Pump Station: 0.00 0.00 0.00 S127 Pump Station: 0.00 0.07 0.07 S129 Pump Station: 0.00 0.02 0.02 S131 Pump Station: 0.00 0.01 0.01 S77: 0.00 0.00 0.00 360 0 S78: 0.00 0.00 0.02 14 9 S79: 0.00 0.00 0.00 95 2 S4 Pump Station: -NR- 0.00 0.00 Clewiston Field Station: 0.00 0.00 0.00 S3 Pump Station: 0.00 0.01 0.01 S2 Pump Station: 0.00 0.04 0.04 S308: 0.00 0.00 0.00 41 4 S80: 0.00 0.00 0.00 -NR- -NR- Okeechobee Average 0.00 0.01 0.01 (Sites S78, S79 and S80 not included) ______________________________________________________________________________ Okeechobee Lake Elevations 12 APR 2009 11.81 Difference from 12APR09 12APR09 -1 Day = 11 APR 2009 11.83 0.02 12APR09 -2 Days = 10 APR 2009 11.87 0.06 12APR09 -3 Days = 09 APR 2009 11.90 0.09 12APR09 -4 Days = 08 APR 2009 11.92 0.11 12APR09 -5 Days = 07 APR 2009 11.93 0.12 12APR09 -6 Days = 06 APR 2009 12.04 0.23 12APR09 -7 Days = 05 APR 2009 12.09 0.28 12APR09 -30 Days = 13 MAR 2009 12.45 0.64 12APR09 -1 Year = 12 APR 2008 10.51 -1.30 12APR09 -2 Year = 12 APR 2007 10.07 -1.74 ______________________________________________________________________________ Long Term Mean 30day Avearge ET for Lake Alfred (Inches) = -NR- ______________________________________________________________________________ Lake Okeechobee Net Inflow (LONIN) Average Flow over the previous 14 days | Avg-Daily Flow 12APR09 Today = 12 APR 2009 -1021 MON | -317 12APR09 -1 Day = 11 APR 2009 -1197 SUN | -3953 12APR09 -2 Days = 10 APR 2009 -278 SAT | -2067 12APR09 -3 Days = 09 APR 2009 616 FRI | -NR- 12APR09 -4 Days = 08 APR 2009 616 THU | 1630 12APR09 -5 Days = 07 APR 2009 -NR- WED | -NR- 12APR09 -6 Days = 06 APR 2009 -NR- TUE | -NR- 12APR09 -7 Days = 05 APR 2009 -NR- MON | -NR- 12APR09 -8 Days = 04 APR 2009 -NR- SUN | -NR- 12APR09 -9 Days = 03 APR 2009 -NR- SAT | -NR- 12APR09 -10 Days = 02 APR 2009 -NR- FRI | -398 12APR09 -11 Days = 01 APR 2009 -NR- THU | -NR- 12APR09 -12 Days = 31 MAR 2009 -NR- WED | -NR- 12APR09 -13 Days = 30 MAR 2009 -NR- TUE | -NR- ______________________________________________________________________________ ______________________________________________________________________________ S65E Average Flow over previous 14 days | Avg-Daily Flow 12APR09 Today= 12 APR 2009 264 MON | 220 12APR09 -1 Day = 11 APR 2009 300 SUN | 226 12APR09 -2 Days = 10 APR 2009 294 SAT | 32 12APR09 -3 Days = 09 APR 2009 295 FRI | 198 12APR09 -4 Days = 08 APR 2009 291 THU | 233 12APR09 -5 Days = 07 APR 2009 288 WED | 101 12APR09 -6 Days = 06 APR 2009 286 TUE | 268 12APR09 -7 Days = 05 APR 2009 282 MON | 168 12APR09 -8 Days = 04 APR 2009 280 SUN | 191 12APR09 -9 Days = 03 APR 2009 276 SAT | 210 12APR09 -10 Days = 02 APR 2009 271 FRI | 133 12APR09 -11 Days = 01 APR 2009 277 THU | 712 12APR09 -12 Days = 31 MAR 2009 238 WED | 204 12APR09 -13 Days = 30 MAR 2009 232 TUE | 797 ______________________________________________________________________________ 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) 12 APR 2009 1994 3033 1800 2494 361 252 11 APR 2009 902 1420 636 861 590 374 10 APR 2009 668 1114 74 -NR- 729 371 09 APR 2009 714 1216 143 295 556 -NR- 08 APR 2009 852 1422 71 138 504 407 07 APR 2009 444 763 0 30 921832 -NR- 06 APR 2009 26 94 0 36 -NR- 371 05 APR 2009 29 156 0 51 -NR- 226 04 APR 2009 776 1260 6 239 -NR- 111 03 APR 2009 588 1224 324 649 303 -NR- 02 APR 2009 676 1367 324 656 393 190 01 APR 2009 740 1632 338 867 334 -NR- 31 MAR 2009 1202 2313 686 1954 225 -NR- 30 MAR 2009 1194 2246 893 1708 83 -NR- 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) 12 APR 2009 3399 -NR- 1479 371 1097 141 11 APR 2009 1129 -NR- 1745 726 1697 201 10 APR 2009 20 -NR- 1916 1204 1793 8 09 APR 2009 21 -NR- 1973 1235 1592 -12 08 APR 2009 11 -NR- 2017 1063 1826 99 07 APR 2009 11 -NR- 2031 1103 2508 -34003 06 APR 2009 12 -NR- 1479 853 1604 -NR- 05 APR 2009 29 -NR- 488 182 795 -NR- 04 APR 2009 361 -NR- 706 254 954 -NR- 03 APR 2009 715 -NR- 970 851 1348 94 02 APR 2009 738 -NR- 0 478 964 16 01 APR 2009 810 -NR- 0 38 410 6 31 MAR 2009 974 -NR- 847 520 752 34 30 MAR 2009 2207 -NR- 1658 992 1225 17 *** 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 13APR2009 @ 17:15 ** Preliminary Data - Subject to Revision **