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UPPER MISSISSIPPI RIVER LOCKS AND DAMS 21 Jan. 1946, Depth at Level Upper Pool : Pot Miles Above Usable Lock Elevation Lift oe : No. Ohio River Nearest Town Bank Size in Feet (1) (2) Upper Sill Lower Sill Feet Feet Feet Feet 1 847.6 Minneapolis--St. Paul, Minn.... R 56 x 400 (3) 725.1 37.9 15.5 10.1 56x 400° te. LS 14.5 7.6 2 815.2 Hastings, Manns. = 0. 2 R 110 x 500 687.2 12:2 16.0 15,1 110 x 3600 = 1. oo me. eee Under construction 3 796.9 Red Wing, Minn... <3. oe. R 110 x 600 675.0 8.0 17.0 14.0 4 752.8 Alma, Wis. L 110 x 600 667.0 7.0 17.0 13.0 S 738.1 Minneiska, Minn. .02 5.3... .. Vee 110 x 600 660.0 9.0 18.0 12.0 5A 728.5 Winona, Minn 20. 2 R 110 x 600 651.0 5.5 18.0 12.5 6 714.3 Trempealeau, Wis... 6.0 2.025 55. L 110 x 600 645.5 6.5 17.0 12:5 7 702.5 Dresbach; Minn. 2). 2.0... 2. R 110 x 600 639.0 8.0 18.0 12.0 8 679.2 Genoa, Wis.) 65 L 110 x 600 631.0 11.0 22.0 14.0 9 647.9 bynxville, Wis: L 110 x 600 620.0 9.0 16.0 13.0 10 615.1 Guttenbers, Ia... . 2 R 110 x 600 611.0 8.0 15.0 12.0 11 583.0 Dubuque, lat] 003.6004 R 110 x 600 603.0 11:0 18.5 12.5 12 556.7 Bellevue, la: 222. 3 Re 110 x 600 592.0 9.0 17.0 13.0 13 522.5 Clinton, (a... 3.5: L 110 x 600 583.0 11.0 19.0 13.0 14 493.3 LevOlare la: R 110 x 600 572.0 11.0 20.5 13.5 493.1 Pleasant Valley, Ta./.0.. 20.2... R 80 x 320 572.0 11.0 17.6 10.9 15 482.9 Rock island, lll; =. 3s L 110 x 600 561.0 16.0 24.0 11.0 110 = 360) oe 17.0 11.0 16 457.2 Muscatine: fa. ee L 110 x 600 545.0 9.0 £7.00 12.0 17 437.1 New Boston, WL... 22262... L 110 x 600 536.0 8.0 16.0 13.0 18 410.5 Burungton, Ta... 36. 323 L 110 x 600 528.0 9.8 16.5 TACT 19 364.2 Keokuk, Ia. 20 2. R 110 x 358 518.2 38.2 14.0 9.2 110 x 1200 222) Dy ee ee oe Proposed 20 343.2 Canton, MO.) 2 3 R 110 x 600 480.0 10.0 15.0 12.0 21 324.9 Quincy, Hl L 110 x 600 470.0 10.5 16.5 12.0 22 301.2 Sayerton, Mo... :..... aaa ss R 110 x 600 459.5 10.2 18.0 13.8 24 273.4 Clarksville; Mo:.0 22. 28. cc: R 110 x 600 449.0 15.0 19.0 12.0 25 241.4 Cap Aw Gus, Mo... .-.. 05... R 110 x 600 434.0 15.0 19.0 12.0 26 202.9 Alton? the) ee L 110 x 600 419.0 (4) 22.0 32.0 oo 110 x 360 = 30. Cae 16.0 (1) Elevation of pools for Dams 24, 25 & 26 referred to M.S.L., 1929 Adj.; all others to M.S.L., 1912 Adj. (2) Lift at flat pool stage. (3) Top of flashboards, normal pool. Masonry crest elevation 723.1. (4) Lift above possible future pool. Lift at extreme low water about 28.2 feet. 330 The lock at Pleasant Valley included in the above tabulation is the Le Claire Canal Lock, which was completed prior to the existing canalization project. This lock has been retained for use as an auxiliary lock at Dam No. 14 and is not the main lock at this site. The main lock has usable dimensions of 110 x 600 feet. _From the above information it is evident that a vessel governed in size by the limiting dimensions of the main lock at Keokuk (No. 19), 110 x 358 feet, can proceed from Alton to St. Paul, Minnesota.