CLAIBORNE LOCK AND DAM PERTINENT DATA

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Megan Palmer
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1 CLAIBORNE LOCK AND DAM PERTINENT DATA GENERAL Location Clarke, Monroe, & Wilcox Counties, Alabama; Alabama River, river mile 72.5 Drainage area Millers Ferry to Claiborne sq. mi. 836 Total drainage area above Claiborne Dam site sq. mi. 21,473 Maximum Static Head (feet) 30 RESERVOIR Length at elevation 36.0 feet NGVD29 miles 60.5 Area at pool elevation 36.0 ft. NGVD29 acres 6,290 Total volume at elevation 36.0 ft. NGVD29 acre-feet 102,480 GATED SPILLWAY Total length, including end piers - feet 416 Elevation of crest NGVD Number and Type of gates 6 Tainter Size of gates feet 60x21 Elevation of top of gates in closed position NGVD FIXED CREST SPILLWAY Length feet 500 Elevation of ogee crest NGVD roller bucket EARTH DIKES Right Bank Dike Total length; Top width feet 200; 25.0 Top elevation NGVD v to 3h Left Bank Dike Total length including esplanade and ramp, feet 2,350 Top elevation NGVD Top width feet v to 4h LOCK Maximum lift feet 30.0 Chamber width by length feet 84 x 600

2 SUPPLEMENTARY PERTINENT DATA GENERAL Dam Site Location State Alabama Basin Alabama-Coosa-Tallapoosa Miles above mouth of Alabama River Drainage area Millers Ferry to Claiborne, square miles 836 Total drainage area above Claiborne dam site, square miles 21,473 Type of Project Navigation Objective of Regulation Navigation Project Owner United States of America Operating Agency/Regulatiing Agency U.S. Army Corps of Engineers STREAM FLOW AT DAM SITE Period of record * Period of record (Dam in place) Average annual flow for period of record ( ) - cfs 32,218 Minimum monthly flow in period of record (Sep 2007) cfs 2,397 Maximum monthly flow in period of record (Mar 1961) cfs 165,100 Minimum daily flow in period of record (17 Oct 2007) - cfs 1,540 Maximum flow during period of record (7 Mar 1961) cfs 267,000 Max estimated flow for flood of historical record, Flood of Mar 1929 cfs 270,000 Peak stage for period of record, Flood of Feb-Mar 1961, ft NGVD29 - cfs 58.9 Estimated peak stage for flood of historical record, Flood of March ft NGVD * based on records at USGS gage at Claiborne, 5.77 miles downstream from Claiborne Dam based on records at USGS gage at dam site. REGULATED FLOODS Maximum flood of record (Feb-Mar 1961)* Peak Inflow cfs 257,700 Regulated peak outflow cfs 257,700 Regulated peak headwater - feet NGVD Maximum flood of continuous record (Feb-Mar 1961) - feet NGVD

3 REGULATED FLOODS (CONT D) Standard Project Flood Series Peak inflow to full reservoir cfs 494,500 Regulated peak outflow cfs 486,000 Regulated peak headwater feet NGVD Spillway Design Flood Series Peak inflow to full reservoir cfs 814,800 Regulated peak outflow cfs 788,500 Regulate peak headwater feet NGVD * Computed flow with Robert F. Henry and APC Dams assumed in operation. RESERVOIR Maximum operating pool elevation feet NGVD Minimum operating pool elevation feet NGVD Emergency drawdown elevation feet NGVD@( 32.0 Maximum head feet 30.0 Area at pool elevation 36.0 acres 6,290 Area acquired in fee simple acres 3,015 Area acquired by easement acres 2,681 Area cleared acres 1,500 Maximum elevation of clearing feet NGVD Total volume to elevation 36.0 acre-feet 102,480 Length miles 60.5 Shoreline distance at elevation 36.0 miles 216 LOCK Nominal size of chamber - feet 84 x 600 Distance center to center of gate pintles -, feet Maximum lift - feet 30.0 Elevation of upper stop-log sill - feet NGVD Elevation of upper miter sill - feet NGVD Elevation of lower stop-log sill - feet NGVD Elevation of lower miter sill - feet NGVD Elevation of chamber floor - feet NGVD Elevation of top of floor culverts - feet NGVD Elevation of top of upper and lower approach walls - feet NGVD

4 LOCK (CONT D) Elevation of top of chamber walls - feet NGVD Freeboard on lock walls when lock becomes inoperative - feet 4.0 Percent of time inoperative 2.0 Type of upper gate horizontally-framed miter Height of upper gate - feet 32.0 Type of lower gate horizontally-framed miter Height of lower gate - feet 59.0 Type of culvert valves reverse tainter Dimensions of culverts at valves - feet 10 x 10 Dimensions of culverts at lateral - feet 10 x 13 Elevation of culvert ceilings between valves - feet NGVD Minimum submergence of culvert valves - feet 6.0 Type of filling and emptying system middle third laterals GATED SPILLWAY Total length, including end piers - feet 416 Net length - feet 360 Elevation of crest feet NGVD Number of piers, including end piers 7 Width of piers - feet 8 Type of gates Tainter Number of gates 6 Length of gates - feet 60.0 Height of gates - feet 21.0 Maximum discharge capacity cfs 67,111 Elevation of top of gates in closed position feet NGVD Elevation of low steel of gates in fully open position feet NGVD Elevation of trunnion feet NGVD Elevation of access bridge feet NGVD Elevation of stilling basin apron feet NGVD29 variable -5 to -10 Height of end sill - feet 5.0 roller basin

5 FIXED CREST SPILLWAY Length - feet 500 Elevation of ogee crest feet NGVD roller bucket EARTH DIKES Right Bank Dike Total length feet 200 Top elevation feet NGVD Top width feet v to 3 h Thickness of riprap on slopes inches 24 Thickness of filter blanket inches 9 Top elevation of steel pile cutoff wall feet NGVD29 36 Maximum swellhead when dike is overtopped, feet 0.6 Recurrence interval of flood which will overtop dike, years 0.5 Freeboard, top of dike above normal upper pool, feet 5 Left Bank Dike Total length including esplanade and ramp - feet 2,350 Top elevation feet NGVD Top width - feet v to 4 h Maximum swellhead when dike is overtopped - feet 0.6 Freeboard, top of dike above headwater for maximum flood of continuous record (Feb-Mar 1961) - feet 1.2

STRUCTURE S-65 PURPOSE SPILLWAY OPERATION

STRUCTURE S-65 PURPOSE SPILLWAY OPERATION STRUCTURE S-65 This structure is a reinforced concrete, gated spillway with discharge controlled by three cable operated, vertical lift gates, and a reinforced concrete lock structure with two pairs of