U. S. Army Corps of Engineers, Jacksonville District Lake Okeechobee and Vicinity Report Data Ending 2400 hours 21 SEP 2008 _____________________________________________________________________________ Okeechobee Lake Regulation Elevation Last Year 2YRS Ago (ft-NGVD) (ft-NGVD) (ft-NGVD) *Okeechobee Lake Elevation 15.07 9.63 13.45 (Official Elv) Bottom of High Lake Mngmt= 16.60 Top of Water Short Mngmt= 12.81 Currently in Operational Management Band 21SEP (1965-2007) Period of Record Average 14.69 Difference from POR Average 0.38 Simulated Average LORS2008 [1965-2000] 13.63 Difference from Average LORS2008 1.44 Today Lake Okechobee elevation is determined from the 4 interior stations ++Navigation Depths (Based on 2001 Channel Condition Survey) Route 1 ÷ 9.01' Route 2 ÷ 6.41' Bridge Clearance = 48.60' ______________________________________________________________________________ 4 Interior and 4 Edge Okeechobee Lake Average (Avg-Daily values): L001 L005 L006 LZ40 S4 S352 S308 S133 14.95 15.10 15.06 15.18 15.13 15.27 15.04 15.11 *Combination Okeechobee Avg-Daily Lake Average = 15.10 (*See Note) Interior Okeechobee Lake Average (Avg-Daily values): L001 L005 L006 LZ40 14.95 15.10 15.06 15.18 *Interior Okeechobee Avg-Daily Lake Average = 15.07 (*See Note) Okeechobee Lake Average (Avg-Daily values): (BAD) (BAD) C5 S4 S3 S2 S352 S308 S135 S133 S127 S129 15.06 15.13 15.20 15.11 15.27 15.04 14.95 15.11 15.04 15.07 *Edge Okeechobee Avg-Daily Lake Average = 15.10 (*See Note) ______________________________________________________________________________ Okeechobee Inflows (cfs): S65E 2152 S191 0 Fisheating Cr 187 S154 44 S133 Pumps -NR- S135 Pumps 0 S84 0 S127 Pumps 0 S2 Pumps 0 S71 221 S129 Pumps 74 S3 Pumps 0 S72 0 S131 Pumps 0 S4 Pumps 0 Total Inflows: 2678 Okeechobee Outflows (cfs): S135 Culverts 0 S354 0 S77 -NR- S127 Culverts -NR- S351 0 S308 3564 S129 Culverts 0 S352 0 S131 Culverts L8 Canal Pt 192 C5 -NR- Total Outflows: No Report Due To Missing S77 or S308 Discharge Data Okeechobee Pan Evaporation (inches): S77 0.27 S308 0.22 Average Pan Evap x 0.75 Pan Coefficient = 0.18" = 0.02' Lake Average Precipitation using NEXRAD: = 0.11" = 0.01' Evaporation - Precipitation: = 0.07" = 0.01' Evaporation - Precipitation using Lake Area of 730 square miles is equal to 1448 cfs out of the lake. Lake Okeechobee (Change in Storage) Flow is -4336 cfs or -8600 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: 13.71 15.00 -NR- 0 0 0 0 -NR- (cfs) S193: ______ S191: 19.32 14.71 0 0.0 0.0 0.0 S135 Pumps: 13.21 14.88 0 0 0 0 0 (cfs) S135 Culverts: 0 0.0 0.0 North West Shore S65E: 21.03 14.69 2152 0.9 0.9 0.9 0.9 0.9 0.9 S127 Pumps: 13.59 15.05 0 0 0 0 0 0 (cfs) S127 Culvert: -NR- -NR- S129 Pumps: 13.11 15.04 74 12 18 43 (cfs) S129 Culvert: 0 0.0 S131 Pumps: 13.37 15.22 0 0 0 (cfs) S131 Culvert: Fisheating Creek nr Palmdale 31.50 187 nr Lakeport ______ C5: ______ 15.06 -NR- -NR- -NR- -NR- South Shore S4 Pumps: 10.82 15.11 0 0 0 0 (cfs) S169: 15.19 10.98 0 0.0 0.0 0.0 S310: ______ -NR- S3 Pumps: ______ -NR- 0 0 0 0 (cfs) S354: -NR- ______ 0 -NR- -NR- S2 Pumps: 10.87 15.08 0 0 0 0 0 (cfs) S351: 15.08 10.87 0 -NR- -NR- -NR- S352: 15.24 10.45 0 0.0 0.0 C10A: -NR- 14.32 -NR- -NR- 7.0 -NR- -NR- L8 Canal PT 14.40 192 _________________________________________________________________________ Temporary Pumps S351: 10.87 15.08 0 -NR--NR--NR--NR--NR--NR- S352: 10.45 15.24 0 -NR--NR--NR--NR- S354: ______ -NR- 0 -NR--NR--NR--NR- _________________________________________________________________________ Caloosahatchee River (S77, S78, S79) S47B: 14.72 12.19 0.0 0.0 S47D: 12.20 10.76 0 0.0 S77: Spillway and Sector Flow: 14.74 10.94 4044 3.9 3.9 3.9 3.8 Flow Due to Lockages+: -NR- S77 Below USGS Flow Gage 3761 (TESTING) S78: Spillway and Sector Flow: 10.70 3.07 3457 3.0 3.0 3.0 3.0 Flow Due to Lockages+: 5 S79: Spillway and Sector Flow: 2.81 1.71 4738 2.0 2.0 3.0 3.0 3.0 3.0 2.0 2.0 Flow Due to Lockages+: 5 Percent of flow from S77 85% Chloride (ppm) 45 St. Lucie Canal (S308, S80) S308: Spillway and Sector Flow: 15.06 14.90 3564 6.0 6.0 6.0 6.0 Flow Due to Lockages+: 0 S308 Below USGS Flow Gage 2570 S153: 18.70 14.78 118 -NR- 0.5 S80: Spillway and Sector Flow: 14.23 1.56 2151 0.0 0.7 0.7 0.7 0.7 0.7 0.7 Flow Due to Lockages+: 12 Percent of flow from S308 166% Steele Point Top Salinity (mg/ml) 28 Steele Point Bottom Salinity (mg/ml) 25 Speedy Point Top Salinity (mg/ml) 14 Speedy Point Bottom Salinity (mg/ml) 9 + 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: 0.01 1.63 2.03 S193: -NR- 0.00 0.00 -NR- -NR- Okeechobee Field Station: 0.02 0.02 0.06 S135 Pump Station: 0.00 0.03 0.13 S127 Pump Station: 0.02 0.02 0.11 S129 Pump Station: 1.80 1.80 2.13 S131 Pump Station: 0.00 0.00 0.39 S77: 0.00 0.00 753.60 360 0 S78: 0.03 0.04 0.65 18 0 S79: 0.61 0.61 1.96 47 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 0.34 0.82 S308: 0.00 0.00 0.53 68 0 S80: 0.11 0.28 0.54 12 0 Okeechobee Average 0.17 0.30 58.45 (Sites S78, S79 and S80 not included) ______________________________________________________________________________ Okeechobee Lake Elevations 21 SEP 2008 15.07 Difference from 21SEP08 21SEP08 -1 Day = 20 SEP 2008 15.09 0.02 21SEP08 -2 Days = 19 SEP 2008 15.11 0.04 21SEP08 -3 Days = 18 SEP 2008 15.15 0.08 21SEP08 -4 Days = 17 SEP 2008 15.16 0.09 21SEP08 -5 Days = 16 SEP 2008 15.16 0.09 21SEP08 -6 Days = 15 SEP 2008 15.16 0.09 21SEP08 -7 Days = 14 SEP 2008 15.15 0.08 21SEP08 -30 Days = 22 AUG 2008 12.83 -2.24 21SEP08 -1 Year = 21 SEP 2007 9.63 -5.44 21SEP08 -2 Year = 21 SEP 2006 13.45 -1.62 ______________________________________________________________________________ Long Term Mean 30day Avearge ET for Lake Alfred (Inches) = 4.03 ______________________________________________________________________________ Lake Okeechobee Net Inflow (LONIN) Average Flow over the previous 14 days | Avg-Daily Flow 21SEP08 Today = 21 SEP 2008 3239 MON | 3464 21SEP08 -1 Day = 20 SEP 2008 4058 SUN | -NR- 21SEP08 -2 Days = 19 SEP 2008 6275 SAT | -3453 21SEP08 -3 Days = 18 SEP 2008 9828 FRI | -NR- 21SEP08 -4 Days = 17 SEP 2008 9828 THU | 2036 21SEP08 -5 Days = 16 SEP 2008 10894 WED | -NR- 21SEP08 -6 Days = 15 SEP 2008 11359 TUE | 2313 21SEP08 -7 Days = 14 SEP 2008 12810 MON | 2489 21SEP08 -8 Days = 13 SEP 2008 15101 SUN | 2553 21SEP08 -9 Days = 12 SEP 2008 16146 SAT | 3136 21SEP08 -10 Days = 11 SEP 2008 17329 FRI | 3546 21SEP08 -11 Days = 10 SEP 2008 18707 THU | 8749 21SEP08 -12 Days = 09 SEP 2008 19814 WED | 4383 21SEP08 -13 Days = 08 SEP 2008 21743 TUE | 6415 ______________________________________________________________________________ ______________________________________________________________________________ S65E Average Flow over previous 14 days | Avg-Daily Flow 21SEP08 Today= 21 SEP 2008 3973 MON | 2152 21SEP08 -1 Day = 20 SEP 2008 4326 SUN | 2072 21SEP08 -2 Days = 19 SEP 2008 4801 SAT | 1738 21SEP08 -3 Days = 18 SEP 2008 5338 FRI | 2851 21SEP08 -4 Days = 17 SEP 2008 5842 THU | 3032 21SEP08 -5 Days = 16 SEP 2008 6400 WED | 3696 21SEP08 -6 Days = 15 SEP 2008 6997 TUE | 3505 21SEP08 -7 Days = 14 SEP 2008 7594 MON | 3278 21SEP08 -8 Days = 13 SEP 2008 8268 SUN | 4671 21SEP08 -9 Days = 12 SEP 2008 8847 SAT | 4757 21SEP08 -10 Days = 11 SEP 2008 9439 FRI | 4783 21SEP08 -11 Days = 10 SEP 2008 10055 THU | 5520 21SEP08 -12 Days = 09 SEP 2008 10637 WED | 6728 21SEP08 -13 Days = 08 SEP 2008 11133 TUE | 6839 ______________________________________________________________________________ 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) 21 SEP 2008 -NR- -NR- 4363 6866 5096 7068 20 SEP 2008 2346 -NR- 3265 5286 5187 6782 19 SEP 2008 3055 5158 1736 4706 4753 4861 18 SEP 2008 2119 -NR- 2885 3854 3386 3201 17 SEP 2008 1782 2473 1409 2208 1387 1285 16 SEP 2008 626 -NR- 680 980 598 525 15 SEP 2008 0 7 0 168 176 32 14 SEP 2008 0 7 370 658 565 380 13 SEP 2008 0 11 549 916 868 530 12 SEP 2008 0 6 648 1242 2194 1791 11 SEP 2008 0 5 1109 1305 2955 2681 10 SEP 2008 2276 5999 2886 7391 3001 2758 09 SEP 2008 5361 10197 6860 13181 2884 2796 08 SEP 2008 5176 9264 6488 11563 4282 -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) 21 SEP 2008 9404 -NR- 0 0 0 381 20 SEP 2008 7653 -NR- 0 0 0 375 19 SEP 2008 7677 -NR- 0 0 0 333 18 SEP 2008 6963 -NR- 0 0 0 315 17 SEP 2008 4398 -NR- 0 0 0 289 16 SEP 2008 3480 -NR- 0 0 0 232 15 SEP 2008 1318 -NR- 0 0 0 257 14 SEP 2008 3338 -NR- 0 0 0 261 13 SEP 2008 2943 -NR- 0 0 0 236 12 SEP 2008 4660 -NR- 0 0 0 130 11 SEP 2008 4871 -NR- 0 0 0 53 10 SEP 2008 6500 -NR- 0 0 0 -181 09 SEP 2008 18262 -NR- 0 0 0 -303 08 SEP 2008 16073 -NR- 0 0 0 -230 *** 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 22SEP2008 @ 15:15 ** Preliminary Data - Subject to Revision **