APPENDIX A STRUCTURE DESCRIPTIONS AND RATING CURVES. Lake Okeechobee & EAA Vol 3 A-i December 2005 Version 1 Draft 4

Transcription

1 APPENDIX A STRUCTURE DESCRIPTIONS AND RATING CURVES Lake Okeechobee & EAA Vol A-i December 00

2 from the drainage area served, under a design head of. feet pool to pool and intake pool stage between 1.0 and. ft., NGVD. Although under present conditions no pumping is to be done with intake bay water level below elevation. ft., NGVD, the pumps are designed for satisfactory operation with a drawdown to elevation nine and one-half feet to allow for eventual canal subsidence. No pumping should be conducted with the water surface in the intake bay below a gage reading of. ft., NGVD, because under this extreme suction lift condition, pitting of the propellers is likely to occur. If, during a pumping operation, the water surface is drawn down below. ft., NGVD, on the intake bay gage, the speed of all pumps then operating should be reduced to not less than 0 rpm. If this does not restore the water surface in the intake pool to elevation. ft., NGVD, one or more of the pumping units should be shut down until the minimum pool elevation is re-established. The pumps are designed to pump drainage water containing a negligible amount of sediment or other material which might damage the surface of the pump or the bearings. All pump bearings are designed for grease lubrication and to exclude dirt and grit. However, the quantity of water being pumped by the station should be reduced at any time the water in the suction bay becomes moderately silted or if it appears that the approach velocities are carrying a bottom load of sand or silt into the sump chambers. The operation chart for this pump station follows the hydraulic design data table. Note 1: Due to water quality concerns in Lake Okeechobee, at present this pump station is operated according to the EAA IAP. Note : For pump head and flow analysis, see Tables A-1 and A- following the Structure Descriptions. Lake Okeechobee & EAA Vol A-S- December 00

3 PUMP STATION SUMMARY OF HYDRAULIC-DESIGN DATA Criteria Design Design Discharges (cfs) North New River Canal, Hillsboro Canal 1,0 Total pump capacity,00 Design Heads (ft.) Static head, maximum.0 Static head, rated point. Static head, 0-percent point. Design Elevations (ft., NGVD.) Intake water surface, start pumps 1.0 Intake water surface, normal drawdown. Discharge water surface, normal pumping 1. Discharge water surface, maximum pumping, stage of record 1. Discharge water surface, maximum pumping, standard project flood 1.* Discharge water surface, minimum nonpumping.0 Estimated Annual Removal (ac-ft.) North New River Canal 10,000 Hillsboro Canal,000 Total,000 * Note: This value is given in Part I, Supplement for Pump Station as designed. However, due to water quality concerns in Lake Okeechobee at present, the pump station is operated according to the EAA IAP, so this value may differ. Lake Okeechobee & EAA Vol A-S- December 00

4 S- OPERATION CHART Lake Okeechobee & EAA Vol A-S- December 00

5 S- BACK-SIPHONING RATING CURVE Lake Okeechobee & EAA Vol A-S- December 00

6 S- BACK SIPHONING, N. NEW RIVER CANAL Lake Okeechobee & EAA Vol A-S- December 00

7 S- USGS RATING CURVE, NORTH NEW RIVER CANAL Lake Okeechobee & EAA Vol A-S- December 00

8 S- PUMP STATION Location. S- is located in the Herbert Hoover Dike, Levee D, on the south shore of Lake Okeechobee, at the intersection of Miami Canal with Lake Okeechobee, in the western section of Palm Beach County just north of the town of Lake Harbor, Florida. Purpose. The purpose of S- is to pump surplus water into Lake Okeechobee via the Miami Canal from the Agricultural Area south of the pump station at the rate of three-quarter inch per day from the 1 square mile tributary drainage area east and west of the north portion of the Miami Canal, designated as L-. Description. The structure consists of three Fairbanks and Morse vertical propeller axial flow pumps with a pumping capacity of 0 cfs each, a total of,0 cfs, at a rated speed of 1 rpm. The pump station is constructed of reinforcing concrete and concrete block masonry superstructure. Operation. According to the EAA IAP, the pump station will be operated whenever the water surface elevation in the Miami Canal within the Agricultural Area south of the pump station exceeds 1.0 ft., NGVD, unless the water level in Lake Okeechobee is low enough to permit gravity discharge into the lake through S- at a desirable rate. At this speed the pumps will pump 0 cfs or greater with pool to pool heads not in excess of. feet and an intake pool stage between 1.0 and. ft., NGVD. The water surface should not be drawn down below elevation.0 ft., NGVD. The pump station has a design capacity of,0 cfs, equivalent to a removal rate of three quarters of an inch of runoff per day from the drainage area served, under a design head of. feet pool to pool and intake pool stage between 1.0 and. ft., NGVD. The pumping machinery is designed to permit operation at rated conditions of head and capacity with intake water surface down to elevation. ft., NGVD. The pumps are designed to pump drainage water containing a negligible amount of sediment or other material which might damage the surface of the pump or the bearings. All pump bearings are designed for grease lubrication and to exclude dirt and grit. However, the quantity of water being pumped by the station should be reduced at any time the water in the suction bay becomes moderately silted or if it appears that the approach velocities are carrying a bottom load of sand or silt into the sump chambers. The pumping units are free from harmful criticals throughout the range of operating speeds from 0 to 1 rpm inclusive. However, there exists a severe critical at 0 rpm. The unit should therefore be brought up to 00 rpm immediately on starting and no operation should be attempted at speeds below 00 rpm. The pumps should be started and stopped slowly, one pump at a time, so that high velocities and surges will not occur in the Miami Canal. Lake Okeechobee & EAA Vol A-S-1 December 00

9 1 1 The backflow control gates serve two primary functions: (1) To permit priming of the pumps and starting of the engines without danger of reverse rotation and without regard to relative pool stages, and () to prevent backflow through the pumps during periods when abnormally high discharge pool elevations exceed the pump invert elevation. ft., NGVD. Structure gates shall be closed during pumping operations. The operation chart for this pump station follows the hydraulic design data table. Note 1: Due to water quality concerns in Lake Okeechobee, at present this pump station is operated according to the EAA IAP. Note : For pump head and flow analysis, see Tables A-1 and A- following the Structure Descriptions. Lake Okeechobee & EAA Vol A-S- December 00

10 PUMP STATION SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design Pump station capacity (cfs),0 Canal data Length pumped (ft.),00 Drainage area (sq. miles) 1 Run-off, based on / inches per day (cfs),0 Maximum water surface (elev. m.s.l.) (suction bay) 1.0 Drawdown water surface (elev. m.s.l.) 1. Lake Okeechobee data (elev. m.s.l.) (discharge bay) Minimum water surface, non-pumping.0 Discharge water surface, stage of record 1. Discharge water surface, maximum pumping (reduced capacity) SPF 1.* Discharge water surface, non-pumping, normal pool, moderate hurricane with wind and wave. Normal water surface, normal pumping 1. Hydraulic heads Best efficiency point (ft.). At rated capacity (ft.). Quantities Annual removal (acre-ft.) 0,000 * Note: This value is given in Part I, Supplement 1 for Pump Station as designed. However, due to water quality concerns in Lake Okeechobee at present, the pump station is operated according to the EAA IAP, so this value may differ. Lake Okeechobee & EAA Vol A-S- December 00

11 S- OPERATION CHART Lake Okeechobee & EAA Vol A-S- December 00

12 APPENDIX A WATER CONTROL STRUCTURES Structure Description Page No. S- Pump Station A-S-1 S- Pump Station A-S-1 S- Pump Station A-S-1 S-A(W) Structure A(W) A-SA(W)-1 S-A(E) Structure A(E) A-SA(E)-1 S-A(S) Structure A(S) A-SA(S)-1 S-A(X) Pump Station A(X) A-SA(X)-1 S-A Structure A A-SA-1 S- Pump Station A-S-1 S- Pump Station and Spillway A-S-1 S- Pump Station and Spillway A-S-1 S-B Structure B A-SB-1 S-D Structure D A-SD-1 S-E Structure E A-SE-1 S-1 Structure 1 A-S1-1 S- Structure A-S-1 S- Structure A-S-1 S- Structure A-S-1 Moore Haven Lock (formerly hurricane gate structure [HGS] No. 1) A-S- S- Structure A-S-1 Ortona Lock A-S- S- Structure A-S-1 W.P. Franklin Lock and Dam A-S- S-0 Structure 0 A-S0-1 St. Lucie Lock A-S0- S- Structure A-S-1 S-1 Pump Station 1 and Lock A-S1-1 S-1 Pump Station 1 A-S1-1 S- Pump Station and Lock A-S-1 S-1 Pump Station 1 A-S1-1 S-1 Pump Station 1 and Lock A-S1-1 S- Structure A-S-1 S-1 Structure 1 A-S1-1 S-1 Structure 1 A-S1-1 S-1 Structure 1 A-S1-1 Lake Okeechobee & EAA Vol A-ii December 00

13 S- BACK-SIPHONING RATING CURVE Lake Okeechobee & EAA Vol A-S- December 00

14 S- BACK-SIPHONING RATING CURVE-1 PUMP SIPHONING Lake Okeechobee & EAA Vol A-S- December 00

15 S- USGS RATING CURVE Lake Okeechobee & EAA Vol A-S- December 00

16 S- PUMP STATION Location. S- is located in the Herbert Hoover Dike on the southwest shore of Lake Okeechobee approximately three miles along Levee D1 in a northwesterly direction from Clewiston, Florida. Purpose. The purpose of S- is to pump surplus water into Lake Okeechobee via the L-D1 borrow canal, C-0 and C-1 from the Agricultural Area south of the pump station. S- serves square miles of drainage area including 1. square miles of agricultural area and. square miles of urban area. The pump station will be operated as necessary to maintain the water level between elevations. and 1. ft., NGVD in the intake canals. The surplus consists of seepage through the Herbert Hoover Dike and runoff at the rate of three quarters of an inch per day from the square mile tributary drainage area, and at a rate of two and one-half inches per day from the. square mile urban drainage area of the city of Clewiston. Description. The station consists of three Fairbanks Morse 1 inch diameter vertical propeller axial flow pumps with a pumping capacity of cfs each, a total of,0 cfs, at a rated speed of rpm. Operation. The pump station will be operated as necessary to maintain the water level between elevations. and 1. ft., NGVD in the intake canals. At rpm the pumps will pump cfs with a pool to pool head of seven feet and an intake pool stage not lower than. ft., NGVD. The pumping units are free from harmful criticals through the speed range zero to rpm. However, there exists a minor critical at 11 rpm and extended operation at this speed is to be avoided, except as necessary in the starting and slowing down phases. The pumps should be started and stopped slowly, one pump at a time, in order to avoid high velocities and surges in the approach canal. The water surfaces should not be drawn down below elevation. ft., NGVD, at the pump intake in order to prevent pitting of the propellers. If, during a pumping operation, the water surface on the intake bay falls below. ft., NGVD, the speed of all pumps then operating should be reduced to not less than the minimum speed shown on the operation chart. If this does not restore the water surface in the intake pool to. ft., NGVD, one or more of the pumping units should be shut down until the minimum pool elevation is reestablished. The pump station has a minimum total capacity of,0 cfs, equivalent to a removal rate of three quarters of an inch of runoff per day from the agricultural area and four inches per day from the urban area, plus seepage from the ten-year flood stage of 1. ft., NGVD, on Lake Okeechobee. This capacity is achieved at an average pool to pool head up to and including seven feet; it will also deliver a reduced capacity at higher pool to pool head up to and including 1.0 feet. At heads exceeding seven feet and operating at rpm, the pump capacity decreases to a minimum of 0 cfs at the maximum pool to pool head of 1.0 feet. No operation should be attempted at heads in excess of 1.0 feet nor should Lake Okeechobee & EAA Vol A-S-1 December 00

17 engine speeds be increased above rpm. During extended periods of operation, speed may be decreased in order to improve operating efficiency and fuel economy, although such operation will simultaneously result in a slight decrease in capacity. The station optimum headwater elevations are 1.0 ft., NGVD, during the wet season and 1.0 ft., NGVD during the dry season. Normal drawdown is. ft., NGVD, during pumping. The pumping machinery is designed to pump drainage water containing a negligible amount of sediment or other material which might damage the surface of the pump or the bearings. All pump bearings are designed for grease lubrication and to exclude dirt and grit. However, the quantity of water being pumped by the station should be reduced at any time the water in the suction bay becomes moderately silted or if it appears that the approach velocities are carrying a bottom load of sand into the sump chambers. The backflow control gates serve two primary functions: (1) To permit priming of the pumps and starting of the engines without danger of reverse rotation and without regard to relative pool stages, and () to prevent backflow through the pumps during periods when abnormally high discharge pool elevations exceed the pump invert elevation of. ft., NGVD. The pump station is constructed of reinforcing concrete and concrete block masonry superstructure. The operation chart for this pump station follows the hydraulic design data table. Gate Status Lake Okeechobee LD-1 Normal Range Stage S- Culverts S- S-1 S- HW Over 1. Closed Closed Full Open Auto Full Open Closed Full Open Closed Full Open Closed Full Open Closed - 1 Below 1 Full Open Full Open Closed Full Open Below 1 Note: For pump head and flow analysis, see Tables A-1 and A- following the Structure Descriptions. Lake Okeechobee & EAA Vol A-S- December 00

18 PUMP STATION SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design Location Levee D1 Type of pumps Axial-flow vertical-shaft Number of pumps Pump station capacity (cfs),0 Annual removal (estimated acre-ft) 00,000 Drainage areas (sq. miles) Agricultural area 1. Urban area. Total drainage area.0 Intake water surface elevations Start pumps Wet season 1. Dry season 1. Normal drawdown. Discharge water surface elevations Maximum pumping (SPF).* Normal pumping 1. to 1. Minimum pumping 1. Design heads (ft.) Normal.0 -year flood.0 SPF 1.0 * Note: This value is given in Part I, Supplement for Pump Station as designed. However, due to water quality concerns in Lake Okeechobee at present, the pump station is operated according to the EAA IAP, so this value may differ. Lake Okeechobee & EAA Vol A-S- December 00

19 S- OPERATION CHART Lake Okeechobee & EAA Vol A-S- December 00

20 S-A(W) STRUCTURE A(W) Location. S-A(W) is located in the West Palm Beach Canal (C-1) west of L-0 and the L- canal. Purpose. The structure functions with S-AE, S-AS, and S-A to control irrigation releases along the West Palm Beach Canal east of Levee 0 during periods of flow deficiency and to pass flood runoff from the L- Canal and C-1 into Water Conservation Area (WCA) No. 1 via S-A pump station. Description. The structure is a twin barrel x-foot box type, reinforced concrete culvert. The gates of the structure are located on the east end of the culverts, since during pumping conditions the West Palm Beach Canal to the west is drawn down to. ft., NGVD developing a maximum head on the culvert equivalent to the pool to pool head of the pump station. The structure is designed to pass a maximum of 00 cfs at such times as necessary but not including times when pumping is being conducted at Pump Station No. A. Operation. The gates on the structure are normally closed; however, during times when it is necessary to pass water into the West Palm Beach Canal the gates of S-A(W) and S-A(E) are opened and under favorable head conditions, approximately 00 cfs can be passed through the culverts. The gates shall always be closed when a flood condition exists in the L-, L-1 basin. This condition shall be recognized as existing whenever pump station S-A is not able to lower the stage at Canal Point below 1. feet. The gates may be opened and the excess flows pumped at S-A in the absence of the above condition whenever a flood condition exists in L-, or in the east end of C-1. A potential flood condition exists in the L- basin whenever the stage at Sand Cut exceeds 1.0 feet and in the east end of the C-1 stage whenever the tailwater at S-AE exceeds 1.0 feet. The use of the gate is also determined by other factors, such as environmental concerns, and water level in WCA No.1. It will be considered case by case. When flood conditions do not exist the gates will be operated subject to water availability to meet water use requirements in C-1 east of WCA No. 1 and in the L- basin. Lake Okeechobee & EAA Vol A-SA(W)-1 December 00

21 STRUCTURE A(W) SUMMARY OF HYDRAULIC DESIGN DATA Item Design Discharge (cfs) 00 Headwater 1.0 Tailwater. Structure type reinforced concrete box culvert Number of barrels Size ft. X ft. Length 0 ft. Gates Number Type sluice gates mounted in wet well Size ft. X ft. Control manual Lake Okeechobee & EAA Vol A-SA(W)- December 00

22 S-A(E) STRUCTURE A(E) Location. S-A(E) is located in the West Palm Beach Canal (C-1) east of L-0 and the L- canal. Purpose. This structure functions with S-AW, S-AS, and S-A to control irrigation releases along the West Palm Beach Canal east of Levee 0 during periods of flow deficiency and to pass flood runoff from the L- Canal and C-1 into WCA No. 1 via S-A pump station. Description. The structure is a twin barrel x-foot box type, reinforced concrete culvert. The structure is identical to S-A(W) except that the gates are located on the west end where the maximum head occurs. The structure is designed to pass a maximum of 00 cfs of water under favorable head conditions. Operation. The maximum head on the structure when it is operated is. ft., NGVD, a condition obtained during pumping at S-A with S-A(S) open raising the pool level of WCA No.1 and L- Canal to 1. ft., NGVD, on the west side of the structure and with normal water level of 1.0 ft., NGVD, on the east end of the structure. During flood conditions, the gates will be closed whenever releases would aggravate flood conditions downstream. The gates will be opened whenever damage stages will not be exceeded below the structure and excess water in West Palm Beach Canal, Levee Canal, or WCA No. 1 is increasing flood potential in the Agricultural Area southeast of the lake. When flood conditions do not exist, releases will be made as necessary to meet the agricultural needs of the area. Lake Okeechobee & EAA Vol A-SA(E)-1 December 00

23 TABLE OF CONTENTS (Continued) S-11 Structure 11 A-S11-1 S-1 Structure 1 A-S1-1 S-1 Structure 1 (formerly HGS No. ) A-S1-1 S- Structure A-S-1 S- Pump Station A-S-1 S-0B & C Structure 0B & C A-S0-1 (Port Mayaca Spillway and Lock) S- Structure (formerly HGS No. ) A-S-1 S- Structure 1 (formerly HGS No. ) A-S1-1 S- Structure (formerly HGS No. ) A-S-1 S- Structure (formerly HGS No. ) A-S-1 HCL Henry Creek Lock A-HCL-1 S-SCS Sixteen Erosion Control Spillways A-SCS-1 Culvert Description Page No. C1 Culvert 1 in L-D1 A-C1-1 C1A Culvert 1A in L-D1 A-C1A-1 C Culvert in L-D1 A-C-1 C Culvert in L-D A-C-1 C1 Culvert A in L-D A-CA-1 C Culvert in L-D A-C-1 CA Culvert A in L-D A-CA-1 C Culvert in L-D A-C-1 C Culvert in L-D A-C-1 C Culvert in L-D A-C-1 C Culvert in L-D A-C-1 C Culvert in L-D A-C-1 CA Culvert A A-CA-1 C Culvert in L-D A-C-1 C1 Culvert 1 in L-D A-C1-1 C1A Culvert 1A in L-D A-C1A-1 C1 Culvert 1 in L-D A-C1-1 C1 Culvert 1 in L-D A-C1-1 C1 Culvert 1 in L-D A-C1-1 C1 Culvert 1 in L-D A-C1-1 S-1C Culvert S-1C in L-D A-S1C-1 TCC Taylor Creek Culverts in L-D A-TCC-1 C1 C-1 Gated Culvert A-C1-1 G Popash Slough Culvert (G-) A-G-1 Lake Okeechobee & EAA Vol A-iii December 00

24 STRUCTURE A(E) SUMMARY OF HYDRAULIC DESIGN DATA Item Design Discharge (cfs) 00 Headwater. Tailwater.0 Structure type reinforced concrete box culvert Number of barrels Size ft X ft Length ft Gates Number Type sluice gates mounted in wet well Size ft X ft Control manual Lake Okeechobee & EAA Vol A-SA(E)- December 00

25 S-A (S)_STRUCTURE A(S) Location. S-A(S) is located in the L-0 Borrow Canal south of the West Palm Beach Canal (C-1) at a point where L- intersects the L-0 Borrow Canal on the northern perimeter of WCA No. 1. Purpose. This structure functions with S-AE, S-AE and S-A to control flood runoff from the L- area, and to make irrigation releases from WCA No. 1 to the L-, L-1, L-, and C-1 basins. Description. S-A(S) is a twin slide gate spillway with sill elevation at approximately one foot, NGVD and has a breast wall above the gates from elevation 0.0 to.0 ft., NGVD. The structure is designed to pass a maximum of,000 cfs under the most favorable head conditions. Operation. The structure is operated under either flood conditions or for irrigation as follows: Flood conditions: The gates are occasionally opened to pass flood flows from the L- borrow canal to WCA No.1 when the canal stage (L-) exceeds the tailwater (WCA No.1) stage, a very rare occurrence. Irrigation: The gates may be used to discharge flows from WCA No. 1 when the stages in canals in the C-1, L-, L-1, or L- basins are low. Lake Okeechobee & EAA Vol A-SA(S)-1 December 00

26 STRUCTURE A(S) SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design Design conditions Discharge (cfs),000 Headwater (ft.) 1.0 Tailwater (ft.) 1. Structure type reinforced concrete, gated spillway Gates Number of gates Type vertical lift gates Size 1.ft X.ft Control manual Lake Okeechobee & EAA Vol A-SA(S)- December 00

27 S-A (X) STRUCTURE A(X) Location. S-A(X) is located in the Cross Canal between the Hillsboro and West Palm Beach Canals in Palm Beach County. Purpose. The structure is located at the drainage divide on the Cross Canal (L-1 borrow canal) between West Palm Beach Canal and the Hillsboro Canal. Its purpose is to function as a basin divide, and to channel excess water either to the Hillsboro or West Palm Beach Canals as capacity is available. Description. The structure consists of four gated -inch diameter CMP culverts in an earthwork fill. The top of the fill is 1 ft., NGVD and the invert elevation is. ft., NGVD. The barrel length is ft. Design discharge is 00 cfs with 0. feet of head. Operation. The structure normally remains open; however, the structure is closed when pumping at S- and or S-A would cause erosive velocities in the canal, and when water deliveries are being made in the Hillsboro Canal to prevent water from going across to the West Palm Beach Canal. Design water surface elevation for drainage is 1. ft., NGVD and for irrigation is. ft., NGVD. Lake Okeechobee & EAA Vol A-SA(X)-1 December 00

28 STRUCTURE A(X) SUMMARY OF HYDRAULIC DESIGN DATA Item Design Discharge (cfs) 00 Structure Type cmp Number of barrels Size ft. dia Length ft. Gates Number Type sluice gates Size ft. dia Control manual Lake Okeechobee & EAA Vol A-SA(X)- December 00

29 S-A PUMP STATION A Location. S-A is located at the intersection of the West Palm Beach Canal (C-1) and Levees and 0. Purpose. The primary purpose of the pump station is to pump surplus water from the L-, L-1 basin, the S-A agricultural are northwesterly of the pump station into WCA No. 1 at the rate of three-quarters of an inch per day from the 0 square mile tributary drainage area. The structure is also used to remove excess flows from the L- and C-1 basins or can be used to remove excess water from Lake Okeechobee when it is above its regulation schedule. Description. S-A is designed to remove three-quarters of an inch of runoff per day (, cfs) from the tributary agricultural area of 0 square miles. Actual installed capacity is,00 cfs. The station consists of six horizontal propeller, axial flow pumps. Each pump has a pumping capacity of 00 cfs. Design head differential is. ft., NGVD. Operation. In addition to local runoff, the station will also pump water from Lake Okeechobee to WCA No. 1 at the available capacity of the West Palm Beach Canal and the pump station when the Lake stage exceeds the regulation schedule. Under design head the pump station capacity is,00 cfs for removal of excess water from the Agricultural Area; however, canal dimensions limit the Lake Okeechobee regulatory capacity to approximately 1,0 cfs. See Levee basin for a discussion of S-A(E), S-A(W), and S-A(S). Lake Okeechobee & EAA Vol A-SA-1 December 00

30 PUMP STATION A SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design Location C-1 Flood Discharge Characteristics Discharge (cfs),00 Headwater (ft.) 1.0 Tailwater (ft.).1 Type of pumps inch horizontal propeller Number of pumps Design Rating (cfs) 00 Pump station capacity (cfs),00 Drainage Area (sq. miles) 0 Lake Okeechobee & EAA Vol A-SA- December 00

31 S-A OPERATION CHART Lake Okeechobee & EAA Vol A-SA- December 00

32 S- PUMP STATION Location. S- is located in the Hillsboro Canal at the junction of L- and L-. Purpose. The purpose of S- is to pump surplus water via the Hillsboro Canal from Lake Okeechobee and the Agricultural Area into WCA No.1 at the rate of three-quarters of an inch per day from the 1 square mile tributary drainage area. Description. S- is designed to remove three-quarters of an inch per day of runoff from the 1 square mile drainage area served by the Hillsboro Canal. The station consists of three vertical propeller axial flow pumps with a capacity of cfs each at a design head differential of. ft., NGVD and with intake pool gage between 1. and.0 ft., NGVD. It was considered uneconomical to construct a gravity spillway at the station; however, the pump station can be back-siphoned to supply irrigation water to the Agricultural Area. Operation. S- will be operated to provide regulatory discharge from Lake Okeechobee when canal capacity is not needed for removal of surplus water from the Agricultural Area. Under design head the pump station capacity is,0 cfs; however, canal dimensions limit the Lake Okeechobee regulatory capacity to approximately 00 cfs. In addition, S- is designed to remove three-quarters of an inch per day of runoff from the 1 square mile drainage area served by the Hillsboro Canal. Lake Okeechobee & EAA Vol A-S-1 December 00

33 PUMP STATION SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design Location Hillsboro Canal Type of pumps 1 inch vertical lift Number of pumps Design Rating (cfs) Pump station capacity (cfs), Annual removal (estimated acre-ft) 0,000 Drainage area (sq. miles) 1 Intake water surface elevations Start pumps 1.0 Normal drawdown.0 Discharge water surface elevations Maximum pumping (SPF) 1. Normal pumping 1. Minimum pumping.0 Design heads (ft.) Static head, maximum.0 Static head, rated point. Static head, 0-percent point. Lake Okeechobee & EAA Vol A-S- December 00

34 TABLE OF CONTENTS (Continued) Rating Curves Structure Title Page No. S- Operation Chart A-S- Backsiphoning Rating Curve A-S- Backsiphoning, N. New River Canal A-S- USGS Rating Curve, N. New R. Canal A-S- S- Operation Chart A-S- Backsiphoning Rating Curve A-S- Backsiphoning Rating Curve A-S- USGS Rating Curve A-S- S- Operation Chart A-S- S-A Operation Chart A-SA- S- Operation Chart A-S- S- Operation Chart A-S- S- Operation Chart A-S- S-B Discharge Rating Curve A-SB- S-D Partial Gate Opening Curve A-SD- Maximum Allowable Gate Openings A-SD- Submerged Uncontrolled Flow A-SD- S-E Free Controlled Flow A-SE- Maximum Allowable Gate Openings A-SE- S-1 Free Controlled Flow A-S1- Submerged Uncontrolled Flow A-S1- Submerged Controlled Flow A-S1- Maximum Allowable Gate Openings A-S1- Maximum Allowable Gate Openings A-S1- S- Free Controlled Flow A-S- Submerged Uncontrolled Flow A-S- Maximum Allowable Gate Openings A-S- Maximum Allowable Gate Openings A-S- Partial Gate Openings, Submerged Controlled Flow A-S- S- Submerged Uncontrolled Flow A-S- Partial Gate Opening, Submerged Flow A-S- S- Free Controlled Flow A-S- Submerged Controlled A-S- Submerged Uncontrolled Flow A-S- Maximum Allowable Gate Openings A-S- Lake Okeechobee & EAA Vol A-iv December 00

35 S- OPERATION CHART Lake Okeechobee & EAA Vol A-S-1 December 00

36 S- PUMP STATION & SPILLWAY Location. S- is located in the North New River Canal at the junction of Levees,, and 1. Purpose. The purpose of the station is to discharge drainage water via the North New River Canal from the Agricultural Area into WCA No. A at the rate of three-quarters of an inch per day from the 1 square mile tributary drainage area. Description. The pump station is designed to remove three quarters of an inch of runoff per day from 1 square miles of the Agricultural Area tributary to the North New River Canal. The station consists of three horizontal propeller axial flow pumps with a design capacity of 0 cfs each with pool to pool heads not in excess of. feet and intake pool elevation between 1.0 and. ft., NGVD. Operation. The pump station will be operated whenever the water levels in the North New River Canal within the Agricultural Area tributary to the pump station exceed.-1.0 ft., NGVD, unless the water level in the WCA is low enough to permit gravity discharge at a desirable rate through the adjacent spillway gate or S-; however the water surface should not be drawn down below elevation. feet at the pump station. The station has a gated spillway which allows the discharge of irrigation water to the Agricultural Area. Pump Station Spillway. S- Spillway is an integral part of the S- structure. The spillway consists of a 1 foot- inch wide opening with a vertical lift gate having square feet of opening below elevation 1.0 feet, NGVD and discharges 00 cfs to WCA No. A. The spillway was provided to aid in passing the large quantities of debris that accumulate at the structure and to provide for gravity discharge to effect a savings in pumping costs when stages are low in WCA No. A. The spillway is used primarily for irrigation releases from WCA No. A to the Agricultural Area during the dry season. Lake Okeechobee & EAA Vol A-S-1 December 00

37 PUMP STATION SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design Location North New River Canal Type of pumps 1 inch horizontal Number of pumps Design Rating (cfs) 0 Pump station capacity (cfs),0 Annual removal (estimated acre-ft) 0,000 Drainage area (sq. miles) 1 Intake water surface elevations Start pumps 1.0 Normal drawdown.0 Discharge water surface elevations Maximum pumping (SPF) 1.0 Normal pumping 1.0 Minimum nonpumping.0 Design heads (ft.) Normal. SPF 1.0 Spillway Number of barrels 1 Size 1. ft X 1. ft Length Sill elevation. Gate Size.0 ft X 1. ft Type vertical lift Lake Okeechobee & EAA Vol A-S- December 00

38 S- OPERATION CHART Lake Okeechobee & EAA Vol A-S- December 00

39 S- PUMP STATION & SPILLWAY Location. S- is located in the south end of the Miami Canal at the intersection of Levees,, and. Purpose. The purpose of the pump station is to discharge excess drainage water via the Miami Canal, from the agricultural area north of the pump station, into WCA No. at the rate of three-quarters of an inch per day from the 0 square mile tributary drainage area. Description. The structure consists of four axial flow pumps with design capacity of 1,00 cfs per pump for a total capacity of, cfs at a pool to pool head not in excess of four and one-half feet and intake pool elevation between 1.0 and.0 ft., NGVD. The pump station provides flood control and drainage at a design rate of three quarters of an inch runoff per day from a 0 square mile drainage area. Operation. The pump station will be operated whenever the water level in the Miami Canal within the agricultural area tributary to the pump station exceeds 1 ft., NGVD, unless the water level in the WCA is low enough to permit gravity discharge at a satisfactory rate through the adjacent spillway. The water surface should not be drawn down below.0 feet at the pump station. Pump Station Spillway. S- Spillway is an integral part of the S- structure. The spillway consists of a 1-foot - inch wide opening with a vertical lift gate having square feet of opening below elevation 1.0 feet, NGVD and discharges 00 cfs to WCA No.. The spillway aids in passing the large quantities of debris that accumulate at the structure and acts as a provision for gravity discharge to effect a savings in pumping costs. Lake Okeechobee & EAA Vol A-S-1 December 00

40 PUMP STATION SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design Location Miami Canal Type of pumps 1 inch horizontal Number of pumps Design Rating (cfs) 1,00 Pump station capacity (cfs), Annual removal (estimated acre-ft) 0,000 Drainage area (sq. miles) 0 Intake water surface elevations Maximum, non-pumping 1. Start pumps 1.0 Normal drawdown, lake regulation.0 Maximum drawdown, with pumping.0 Discharge water surface elevations Maximum pumping (SPF) 1. Normal pumping 1. Minimum nonpumping.0 Design heads (ft.) Normal. SPF. Spillway Number of barrels 1 Size 1. ft X 1. ft Length. Sill elevation 1.0 Gate Size 1. ft X 1. ft Type vertical lift Lake Okeechobee & EAA Vol A-S- December 00

41 S- OPERATION CHART Lake Okeechobee & EAA Vol A-S- December 00

42 S-B STRUCTURE B Location. The structure is located in Canal 1 at the Seaboard System Railroad crossing of the canal. Purpose. The structure maintains optimum upstream water control stages in Canal 1; will permit release of floodwater from the Nicodemus Slough Area when capacity is available in Canal 1 south of the structure and will prevent overdrainage of the slough area during dry periods. In addition, the structure will permit water from Lake Okeechobee to be released to Canal 1 south of the structure for agricultural use during dry periods. Description. Structure B is a two barrel -inch CMP culvert structure with reinforced steel concrete headwalls and steel sheet pile wing walls. It is equipped with two structural steel slide gates. The structure can pass the 0 percent SPF design flow of 00 cfs. Invert elevation is. ft., NGVD. Design headwater and tailwater elevations are 1. and 1.0 ft., NGVD, respectively. Operation. The slide gates shall be operated to discharge excess water from L-1 and L- when a stage of 1.0 ft., NGVD, in Canal 1 south of the structure would not be exceeded by such a discharge. During dry periods the gates shall be operated to prevent overdrainage of L-1 and L- and to maintain desirable water levels in Canal 1 south of the structure by supplying water from Lake Okeechobee when the lake stage is above about 1.0 ft., NGVD. Lake Okeechobee & EAA Vol A-SB-1 December 00

43 STRUCTURE B SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design for S.P.F. 0 percent Approximate station + Design discharge (cfs) 00 Type of structure cmp with gates Number of units Diameter (in.) Invert elevation (ft.) Upstream. Downstream. Riprap apron (ft.) Length (ft.) 1.0 Elevation (ft.). Headwater elevation (ft.) Design 1. Maximum 1. Optimum - Minimum.0 Tailwater elevation (ft.) Design 1.0 Maximum 1. Optimum 1.0 Minimum.0 Angle of wingwall with axis of flow Lake Okeechobee & EAA Vol A-SB- December 00

44 S-B DISCHARGE RATING CURVE Lake Okeechobee & EAA Vol A-SB- December 00

45 TABLE OF CONTENTS (Continued) Structure Title Page No. Free Uncontrolled Flow, USGS Rating Table A-S- Discharge Computation Procedure A-S- Lock Computation Procedure A-S- Lock Operating Procedures A-S-1 S- Free Controlled Flow, Modified Structure A-S- Submerged Uncontrolled Flow Modified Structure A-S- Free Controlled Flow, New Structure A-S- Submerged Controlled Flow, New Structure A-S- Submerged Uncontrolled Flow, New Structure A-S- Submerged Controlled Flow, Existing Structure A-S- Free Controlled Flow, Combined Discharge A-S-1 Submerged Controlled Flow, Combined Discharge A-S-1 Maximum Allowable Gate Openings A-S-1 USGS Rating Table for One Tainter Gate A-S-1 USGS Rating Table for One Vertical Lift Gate A-S-1 Lock Computation Procedure A-S-0 Lock Operating Procedures A-S- S- Submerged Controlled Flow, One Gate A-S- Submerged Controlled Flow, Eight Gates A-S- Submerged Uncontrolled Flow A-S- Maximum Allowable Gate Openings A-S- USGS Rating Table for One Gate A-S- Lock Computation Procedure A-S- Lock Operating Procedures A-S-1 S-0 Free Uncontrolled Flow, USGS Rating Table, Gates Out of Water A-S0- USGS Rating Table for St. Lucie Canal at Lock near Stuart, Fl A-S0- Lake Okeechobee & EAA Vol A-v December 00

46 S-D STRUCTURE D Location. Structure D is located in C-1 at the Lake Hicpochee rim levee. Purpose. The structure maintains optimum upstream water control stages in Canal 1 (north of the structure); it passes the design flood without exceeding the upstream flood design stage and restricts downstream flood stages and channel velocities to non-damaging levels; and it permits releases from the Caloosahatchee Canal to meet agricultural water requirements in the area served from C-1, north of the structure when Lake Okeechobee is too low to supply such requirements. Description. Structure D is a single bay vertical lift gate spillway in C-1 at the Lake Hicpochee rim levee used to regulate discharge from C-1 and to prevent overdrainage of the Moore Haven-Newhall area. It is designed to pass cfs during the 0 percent SPF design storm (approximately a one in ten-year event). Optimum upstream elevation is 1.0 ft., NGVD. Operation. The structure will be operated to maintain an optimum headwater elevation of 1. ft., NGVD, insofar as possible, through automatic control as follows: When the headwater elevation rises to 1. feet, the gate begins to open. When the headwater elevation rises or falls to 1. feet, the gate becomes stationary. When the headwater elevation falls to 1. feet, the gate begins to close. Lake Okeechobee & EAA Vol A-D-1 December 00

47 STRUCTURE D SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design for S.P.F. 0 percent Approximate station 1+00 Design discharge (cfs) Headwater elevation Design 1. Maximum 1.1 Optimum 1.0 Minimum.0 Tailwater elevation Design 1. Maximum 1.0 Minimum.0 Crest Shape Trapezoidal Width (ft.).0 Elevation. Gates Number 1 Width (ft.).0 Clearance elevation 1.0 Top Elevation (gates closed) 1.0 Length of riprap below end of training walls (ft.) 0.0 Elevation of riprap apron -1. Lake Okeechobee & EAA Vol A-D- December 00

48 S-D PARTIAL GATE OPENING CURVE CENTRAL AND SOUTHER FLORIDA PROJECT MASTER WATER CONTROL MANUAL FOR LAKE OKEECHOBEE AND THE EVERGLADES AGRICULTURAL AREA STRUCTURE D: PARTIAL GATE OPENING DISCHARGE RATING CURVE JACKSONVILLE DISTRICT U.S. ARMY COPRS OF ENGINEERS Lake Okeechobee & EAA Vol A-D- December 00

49 S-D MAXIMUM ALLOWABLE GATE OPENINGS Lake Okeechobee & EAA Vol A-D- December 00

50 S-D SUBMERGED UNCONTROLLED FLOW Lake Okeechobee & EAA Vol A-D- December 00

51 S-E STRUCTURE E Location. S-E is located on the Kissimmee River (C-) about. miles downstream from S-D and miles downstream from Lake Kissimmee. Purpose. The structure maintains optimum water control stages in C-, (the Kissimmee River); passes the design flood (0% of the SPF) without exceeding the upstream flood design stage and restricts downstream flood stages and channel velocities to non-damaging levels of the design flood, even if inflow exceeds that flood; and it passes sufficient discharge during low-flow periods to maintain downstream stages and irrigation demands. S-E is designed to pass the 0-percent SPF (ten-year) discharge of,000 cfs at a design headwater and tailwater of.0 and 1. ft., NGVD, respectively. Optimum water control elevation is 1.0 ft., NGVD. For more information on this structure refer to the Kissimmee - Istokpoga Water Control Manual. Lake Okeechobee & EAA Vol A-SE-1 December 00

52 STRUCTURE E SUMMARY OF HYDRAULIC DESIGN DATA Criteria Design Design runoff from tributary area - 0% SPF (cfs) 1,000 Firm regulation capacity from lake (cfs),000 Design conditions Discharge (cfs),000 Headwater (ft.).0 Tailwater (ft.) 1. Optimum water surface Headwater (ft.) 1.0 Tailwater (ft.) 1. SPF conditions (on C-) Discharge (controlled)(cfs),000 Headwater (ft.). Est. tailwater (ft.) 0.0 Est. minimum water surface Headwater (ft.) 1. Tailwater (ft.). Critical flood regulatory conditions Maximum discharge (controlled) (cfs),000 Headwater (ft.). Tailwater (ft.) 1. Maximum wind tide tailwater (ft.). Crest Shape Ogee Design head (ft.) 1. Elevation (ft.). Net width (ft.) 1.0 Gates Number Size - width x height (ft.).0 x 1.* Clearance elevation (ft.).0 Piers Number Breastwall Bottom elevation (ft.).0 Top elevation (ft.). Training wall elevation (ft.) 1. Angle of wingwalls with axis of flow Apron Elevation (ft.) -1. Length exclusive of endsill (ft.) 1.0 Endsill and baffle-block elevation (ft.) 1.0 Lake Okeechobee & EAA Vol A-SE- December 00

53 Riprap requirements Length downstream (ft.) 00.0 Downstream elevation (ft.). Length upstream (ft.) 0.0 Upstream elevation (ft.).0 Tieback to Lake Okeechobee and S- levees (el ft.). East tieback to high ground (el. ft.). * Includes 0. ft. overlap on breast wall Lake Okeechobee & EAA Vol A-SE- December 00

54 S-E FREE CONTROLLED FLOW Lake Okeechobee & EAA Vol A-SE- December 00

55 S-E MAXIMUM ALLOWABLE GATE OPENINGS Lake Okeechobee & EAA Vol A-SE-1 December 00

56 TABLE OF CONTENTS (Continued) Structure Title Page No. St. Lucie Spillway, Maximum Allowable Discharge A-S0- St. Lucie Spillway, Maximum Allowable Discharge A-S0-1 Free Controlled Flow, USGS Rating Table, Rating for One Gate A-S0-1 Lock Computation Procedure A-S0-1 Lock Operating Procedures A-S0-0 S- Free Controlled Flow A-S- Controlled Submerged Flow A-S- Controlled Unsubmerged Flow A-S- Uncontrolled Flow A-S- Maximum Allowable Gate Openings, Two Gates A-S- Maximum Allowable Gate Openings A-S- S-1 Operation Chart A-S1- Gravity Performance of Culvert A-S1- S-1 Operation Chart A-S1- Gravity Performance of Culvert A-S1- S- Operation Chart A-S- Gravity Performance of Culvert A-S- S-1 Operation Chart A-S1- S-1 Operation Chart A-S1- Bypass Culverts Discharge Rating Curves A-S1- S- Uncontrolled Flow A-S- Rating Curve A-S- Discharge Rating Curve A-S- S-1 Free Controlled Flow A-S1- Free & Submerged Uncontrolled Flow A-S1- Submerged Controlled Flow A-S1- Maximum Allowable Gate Openings A-S1- S-1 Rating Curve A-S1- Uncontrolled Flow A-S1- Maximum Allowable Gate Openings A-S1- S-1 Discharge Rating Curve A-S1- S-11 Free Controlled Flow A-S11- Submerged Controlled Flow A-S11- Uncontrolled Flow A-S11- Maximum Allowable Gate Openings A-S11- Lake Okeechobee & EAA Vol A-vi December 00

57 S-1 STRUCTURE 1 Location. S-1 is the terminal water control structure in Harney Pond Canal (C-1) about two miles upstream of Lake Okeechobee. Purpose. The structure maintains optimum upstream water control stages in Canal 1; it passes the design flood (0% of the SPF) without exceeding the upstream flood design stage and restricts downstream flood stages and channel velocities to non-damaging levels; and it prevents backflow from Lake Okeechobee during excessive stages in the lake caused by floods or wind tides. Description. The structure is a three-bay spillway with vertical lift gates and a crest elevation of. ft., NGVD. It was designed to pass the 0-percent SPF (ten-year) discharge of,000 cfs at a design headwater and tailwater of 0.0 and 1.0 ft., NGVD, respectively. Normal headwater elevation is 0.0 ft., NGVD. Optimum water control is maintained between 1. and 0. ft., NGVD with automatic gate controls. The automatic controls restrict discharge to design flow by incremental gate openings for inflows greater than the design flow. This control is based on the differential head across the structure. For negative heads, or when the tailwater rises to within 0. foot of the headwater or higher, the gates will close providing protection against Lake Okeechobee wind tides up to the height of the breastwall at.0 ft., NGVD. For more information on this structure refer to the Kissimmee-Istokpoga Water Control Manual. Lake Okeechobee & EAA Vol A-S1-1 December 00

58 STRUCTURE 1 SUMMARY OF HYDRAULIC DESIGN DATA Item Design Approximate station +00 Discharge (cfs) Design Agricultural water supply 00 Regulation 1 Maximum 00 1 Tailwater elevations (ft.) 1 Design Maximum.0 1 Optimum-No flow 1. 1 Optimum-Operative Minimum-No flow. 1 Headwater elevation (ft.) 0 Design Maximum. Optimum 0.0 Minimum 1.0 Crest Shape Ogee Width (ft.).00 Elevation (ft.). Gates Number 0 Width (ft.).0 1 Clearance elevation (ft.) 1.0 Piers Number Width (ft.). Top elevation structure (ft.).0 Training wall elevation (ft.) 1. Angle of wingwall with axis of flow Apron (ft.) Elevation.0 0 Length.0 1 Width 1. Endsill and baffle block elevation (ft.). Riprap below endsill (ft.) 0.0 Lake Okeechobee & EAA Vol A-S1- December 00

59 S-1 FREE CONTROLLED FLOW Lake Okeechobee & EAA Vol A-S1- December 00

60 S-1 SUBMERGED UNCONTROLLED FLOW Lake Okeechobee & EAA Vol A-S1- December 00

61 S-1 SUBMERGED CONTROLLED FLOW Lake Okeechobee & EAA Vol A-S1- December 00

62 S-1 MAXIMUM ALLOWABLE GATE OPENINGS Lake Okeechobee & EAA Vol A-S1- December 00

63 S-1 MAXIMUM ALLOWABLE GATE OPENINGS Lake Okeechobee & EAA Vol A-S1- December 00

64 S- STRUCTURE Location. S- is the terminal water control structure in Indian Prairie Canal (C-0) about four miles upstream from Lake Okeechobee. Purpose. The structure maintains optimum upstream water control stages in C-0; it passes the design flood (0% of the SPF) without exceeding the upstream flood design stage and restricts downstream flood stages and channel velocities to non-damaging levels; and it prevents back-flow from Lake Okeechobee during excessive stages in the lake caused by floods or wind tides. Description. The structure is a two-bay spillway with vertical lift gates and a crest elevation of. ft., NGVD. It was designed to pass the 0-percent SPF (ten-year) discharge of, cfs at a design headwater and tailwater of 0. and 1. ft., NGVD, respectively. Normal headwater elevation is 1.0 ft., NGVD. Optimum water control is maintained between 1. and 0. ft., NGVD with automatic gate controls. The automatic controls restrict discharge to design flow by incremental gate openings for inflows greater than the design flow. This control is based on the differential head across the structure. For negative heads, or when the tailwater rises to within 0. foot of the headwater or higher, the gates will close providing protection against Lake Okeechobee wind tides up to the height of the breastwall at.0 ft., NGVD. For more information on this structure refer to the Kissimmee-Istokpoga Water Control Manual. Lake Okeechobee & EAA Vol A-S-1 December 00

65 STRUCTURE SUMMARY OF HYDRAULIC DESIGN DATA Item Design Approximate station 0+00 Discharge (cfs) Design Agricultural water supply 1 Regulation 0 1 Maximum 00 1 Tailwater elevations (ft.) 1 Design 1. 1 Maximum.0 1 Optimum - No flow 1. 1 Optimum - Operative 1. 1 Minimum - No flow. 1 Headwater elevation (ft.) 0 Design 0. 1 Maximum. Optimum 1.0 Minimum 1.0 Crest Shape Ogee Width (ft.).00 Elevation (ft.). Gates Number 0 Width (ft.).0 1 Clearance elevation (ft.) 1. Piers Number 1 Width (ft.). Top elevation structure (ft.).0 Training wall elevation (ft.) 0.0 Angle of wingwall with axis of flow Apron (ft.) Elevation. 0 Length.0 1 Width. Endsill and baffle block elevation (ft.).0 Riprap below endsill (ft.) 0.0 Lake Okeechobee & EAA Vol A-S- December 00

66 S- FREE CONTROLLED FLOW Lake Okeechobee & EAA Vol A-S-1 December 00

67 TABLE OF CONTENTS (Continued) Structure Title Page No. S- Discharge Rating Curve A-S- S- Operation Chart A-S- S-0B & C Discharge Rating Curve A-S0- Submerged Controlled Flow A-S0- Submerged Uncontrolled Flow A-S0- Submerged Uncontrolled Flow A-S0- Free Uncontrolled Flow A-S0- Submerged Controlled Flow, USGS Rating Table, Four Gates in Water A-S0- Free Controlled Flow, USGS Rating Table, Four Gates Out of Water A-S0- Discharge Computation Procedure A-S0- Lock Computation Procedure A-S0-1 Lock Operating Procedures A-S0-1 S-1 Submerged Controlled Flow A-S1- Submerged Uncontrolled Flow A-S1- Maximum Allowable Gate Openings A-S1- S- Submerged Controlled Flow A-S- Submerged Uncontrolled Flow A-S- Maximum Allowable Gate Openings A-S- Bypass Culverts Discharge Rating Curve A-S- S- Submerged Controlled Flow A-S- Submerged Uncontrolled Flow A-S- Maximum Allowable Gate Openings A-S- G Rating Curve A-G- Lake Okeechobee & EAA Vol A-vii December 00

68 S- SUBMERGED UNCONTROLLED FLOW Lake Okeechobee & EAA Vol A-S- December 00

69 S- MAXIMUM ALLOWABLE GATE OPENINGS Lake Okeechobee & EAA Vol A-S- December 00

70 S- MAXIMUM ALLOWABLE GATE OPENINGS Lake Okeechobee & EAA Vol A-S- December 00

71 S- PARTIAL GATE OPENINGS SUBMERGED CONTROLLED FLOW Lake Okeechobee & EAA Vol A-S- December 00

72 S- STRUCTURE Location. S- is located in the L- borrow canal about 00 feet west of the north tie-back levee, approximately two miles east of Lake Okeechobee. Purpose. The structure prevents runoff from the area east of Levee from overtopping levees in the developed area between the structure and Lake Okeechobee. The structure also makes discharges from the Lake during dry periods through LD- at culvert A. Description. The structure consists of a spillway section with three 1-foot by.-foot roller-bearing gates and lift stands, a breastwall immediately over a sloped weir, gate piers, and retaining walls. A stilling basin with end sill and riprap is provided westward for high velocity discharge to the lake with riprap provided eastward for low velocity flows. Flood discharge of S- is dependent on the capacity of the L- borrow canal between S- and the lake. The capacity under normal head conditions is about 1,000 cfs. Operation. Normally the structure is controlled to meet agricultural requirements as water is available. Gates are full open during this time. During flood conditions, the gates remain open until the water approaches damage stage west of the structure, 1. feet at US 1 or 1.0 feet at the structure. The gates are then operated to allow maximum releases without exceeding damage stages. Lake Okeechobee & EAA Vol A-S-1 December 00