L&D12 6am Report SUNDAY 18 JAN 2026
LockMaster: John Mueller Flat Pool = 11.8 Flat Tail = 2.8 River Mile = 556.7
Asst: James (Jim) Rolling DA = 82,400 mi^2 UNG LOC DA = 635 mi^2 %UNG LOC = 79%
Phone: (563) 872-3314 or (6212) Flood Stage = 17.0 Lock Closed = 18.4 Top of Lock = 22.8
7 Submrg Tainters (60') Gates #1-3, 7-10 LD11(4hr) <- LD12 -> LD13(6hr) Top of Spillway = 12.3
3 Submrg Rollers (100') Gates #4,5,6 Out of Operation = 11.0' = 95,000 cfs Swell Head = 0.4
Max Submrg Setting = -52.5 X -21.0 = 64,100 cfs Gage Zero = 580.2 TW cntrl > 7.8' GATE cntrl < 7.6'
6am Mamimum Permissible Feet of Bulkhead = 286 Record Flood Stage = 23.51 in Apr 1965
M I 1 2 B L V I 4
Float Gage Wind Temp
Pool Tail Tnt Rlr Flow T Q/f R Q/f Pool Tail Pool Tail Spd Dir Gst Air Water Prec
0000: 11.96 5.96 -34.0 -15.0 38.7 ______ ______ 11.96 5.93 11.96 5.93 4 NW 7 13 32 0.00
0100: 11.94 6.00 -34.0 -15.0 38.5 ______ ______ 11.94 5.97 11.95 5.99 2 NW 6 12 32 0.00
0200: 11.91 6.04 -34.0 -15.0 38.3 ______ ______ 11.92 6.05 11.92 6.05 1 W 4 12 32 0.00
0300: 11.89 6.08 -34.0 -15.0 38.1 ______ ______ 11.89 6.08 11.90 6.07 2 W 5 11 32 0.00
0400: 11.86 6.12 -34.0 -15.0 37.8 ______ ______ 11.87 6.12 11.87 6.12 2 W 7 11 32 0.00
0500: 11.83 6.15 -34.0 -15.0 37.6 ______ ______ 11.84 6.15 11.84 6.16 2 NW 6 10 32 0.00
0600: 11.80 6.18 -34.0 -15.0 37.4 ______ ______ 11.80 6.17 11.80 6.17 2 W 6 9 32 0.00 0.00
0700: 11.77 6.20 -34.0 -15.0 37.1 ______ ______ 11.77 6.20 11.77 6.22 2 SW 7 9 32 0.00
0800: 11.73 6.23 -34.0 -15.0 36.8 ______ ______ 11.73 6.23 11.73 6.23 2 W 5 10 32 0.00
0900: 11.77 6.12 -34.0 -15.0 34.1 ______ ______ 11.71 6.22 11.71 6.21 3 NW 7 13 32 0.00
1000: 11.80 6.02 -26.0 -15.0 31.4 ______ ______ 11.82 6.03 11.82 6.03 3 W 7 14 32 0.00
1100: 11.82 5.99 -26.0 -15.0 31.5 ______ ______ 11.84 6.00 11.84 6.00 3 NW 8 14 32 0.00
1200: 11.84 5.97 -26.0 -15.0 31.6 ______ ______ 11.84 5.96 11.83 5.97 3 NW 7 15 32 0.00 0.00
1300: 11.84 5.95 -26.0 -15.0 31.6 ______ ______ 11.84 5.95 11.84 5.95 2 NW 4 15 32 0.00
1400: 11.84 5.93 -26.0 -15.0 31.6 ______ ______ 11.83 5.92 11.84 5.92 4 W 11 15 32 0.00
1500: 11.83 5.91 -26.0 -15.0 31.6 ______ ______ 11.84 5.90 11.83 5.91 3 NW 7 15 32 0.00
1600: 11.83 5.90 -26.0 -15.0 31.6 ______ ______ 11.83 5.90 11.83 5.88 3 NW 5 15 32 0.00
1700: 11.83 5.92 -26.0 -15.0 31.5 ______ ______ 11.82 5.90 11.82 5.89 3 W 6 15 32 0.00
1800: 11.82 5.94 -26.0 -15.0 31.5 ______ ______ 11.82 5.93 11.82 5.93 3 NW 6 15 32 0.00 0.00
1900: 11.81 5.96 -26.0 -15.0 31.4 ______ ______ 11.81 5.94 11.81 5.96 1 NW 3 14 32 0.00
2000: 11.80 5.98 -26.0 -15.0 31.3 ______ ______ 11.80 5.96 11.79 5.97 3 NW 7 13 32 0.00
2100: 11.79 6.00 -26.0 -15.0 31.2 ______ ______ 11.79 5.97 11.79 6.00 3 W 5 12 32 0.00
2200: 11.78 6.03 -26.0 -15.0 31.1 ______ ______ 11.78 6.01 11.78 6.01 2 NW 5 10 32 0.00
2300: 11.77 6.06 -26.0 -15.0 31.0 ______ ______ 11.77 6.06 11.77 6.06 2 NW 6 10 32 0.00
2400: 11.75 6.10 -26.0 -15.0 31.0 ______ ______ 11.75 6.10 11.75 6.10 3 NW 8 8 32 0.00 0.00
0100: 11.75 6.15 -26.0 -15.0 30.9 ______ ______ 11.75 6.12 11.75 6.12 2 W 6 5 32 0.00
0200: 11.74 6.19 -26.0 -15.0 30.9 ______ ______ 11.74 6.17 11.74 6.19 2 W 6 4 32 0.00
0300: 11.74 6.26 -26.0 -15.0 30.8 ______ ______ 11.73 6.24 11.73 6.24 2 W 3 3 31 0.00
0400: 11.73 6.32 -26.0 -15.0 30.8 ______ ______ 11.73 6.30 11.72 6.32 1 W 6 3 32 0.00
0500: 11.72 6.37 -26.0 -15.0 30.7 ______ ______ 11.72 6.36 11.72 6.35 1 NW 3 2 32 0.00
0600: 11.71 6.41 -26.0 -15.0 30.6 ______ ______ 11.72 6.41 11.72 6.42 1 SW 3 2 31 0.00 0.00
-----
0.00
HG QR Chg Prec
MENI2 4.48 14 2 Ystday Avg LD12 Q: 33.8 Chg: -5.8
BUNW3(15) 3.10 110 38 0.00 Ystday Avg LD11 Q: 32.1 Chg: -5.8
UNGAGED 389 117 Ystday Avg Trib Q: 0.4 Chg: -0.1
----- ----- Ystday Avg Stor Q: -0.1
Total 513 157 ------
SPREAD 1.2
OMNI -- 6hr Change = -0.04 24hr Equivl = -0.15 Storage/FT Change = 284 6HR DELTA Pool = -44
FLOAT-- 6hr Change = -0.03 24hr Equivl = -0.12 Storage/FT Change = 284 6HR DELTA Pool = -34
P.T. -- 6hr Change = -0.03 24hr Equivl = -0.12 Storage/FT Change = 284 6HR DELTA Pool = -34
OMNI -- 8hr Change = -0.06 24hr Equivl = -0.19 Storage/FT Change = 284 8HR DELTA Pool = -54
FLOAT-- 8hr Change = -0.06 24hr Equivl = -0.18 Storage/FT Change = 284 8HR DELTA Pool = -51
P.T. -- 8hr Change = -0.06 24hr Equivl = -0.18 Storage/FT Change = 284 8HR DELTA Pool = -51
OMNI -- 12hr Change = -0.10 24hr Equivl = -0.21 Storage/FT Change = 284 12HR DELTA Pool = -59
FLOAT-- 12hr Change = -0.10 24hr Equivl = -0.20 Storage/FT Change = 284 12HR DELTA Pool = -57
P.T. -- 12hr Change = -0.10 24hr Equivl = -0.20 Storage/FT Change = 284 12HR DELTA Pool = -57
Balanced Gates Jacob Charts Rating Table
7.5 x 3.5 (7.6) 56.0 --> 39 x 19 (7.6) 56.0
9.0 x 4.5 (7.8) 58.2 --> 40 x 20 (7.8) 58.0
10.5 x 6.0 (8.0) 60.0 --> 43 x 20 (8.0) 60.0
14.0 x 7.0 (8.2) 62.2 --> 45 x 20 (9.0) 71.3
16.0 x 8.0 (8.4) 64.4 --> 47 x 21 <-- (10.0) 82.7
19.0 x 9.0 (8.6) 66.7 --> 49 x 22 <-- Appendage 21-24 (11.0) 93.6
20.0 x 10.0 (8.8) 69.0 --> 51 x 23 <-- (12.0) 104.3
22.0 x 11.0 (9.0) 71.4 --> 53 x 24 <-- (13.0) 116.7
24.0 x 12.0 (9.2) 73.7 --> 55 x 25 (14.0) 132.2
25.0 x 13.0 (9.4) 76.1 --> 58 x 25 (15.0) 144.7
29.0 x 14.0 (9.6) 78.5 --> 61 x 26 (16.0) 158.1
31.0 x 15.0 (9.8) 81.0 --> 64 x 26 (17.0) 175.2
34.0 x 16.0 (10.0) 83.4 --> 66 x 27 (18.0) 191.5
36.0 x 17.0 (10.2) 85.8 --> 69 x 28 (19.0) 207.6
40.0 x 18.0 (10.4) 88.3 --> 70 x 30 (20.0) 223.9
43.0 x 21.0 (10.6) 90.7 --> 77 x 33 (21.0) 241.3
46.0 x 22.0 (10.8) 93.2 --> 84 x 36 (22.0) 262.2
48.0 x 23.0 (11.0) 95.7 --> 91 x 39 (23.0) 285.3
52.0 x 24.0 (11.2) 98.1 --> 98 x 42 (24.0) 309.5
54.0 x 25.0 (11.4)100.6 --> 105 x 45 (25.0) 335.5
63.0 x 27.0 (26.0) 363.9
(27.0) 398.0