Lock Site Constants
Standard Head Water
Standard Tail Water
Tail Gauge Pile Zero and Lock
Drop in Level between
Depth of water over the
Level with reference to
Level with reference to
Sill Level with reference to
Lock Head and Tail with Lock Sill with the Tail Water
Ordnance Datum
Ordnance Datum
Ordnance Datum
both levels at Standard
Level at Standard
Site
SHWL AOD
STWL AOD
TAIL GPZ AOD
DROP AT S
DEPTH AT S
1
St Johns
71.155
70.301
68.942
0.854
1.359
2
Buscot
70.301
68.613
67.150
1.688
1.463
3
Grafton
68.613
67.503
66.019
1.110
1.484
4
Radcot
67.503
66.022
64.477
1.481
1.545
5
Rushey
66.022
64.199
62.682
1.823
1.517
6
Shifford
64.199
61.971
60.402
2.228
1.569
7
Northmoor
61.971
60.731
59.256
1.240
1.475
8
Pinkhill
60.731
59.676
58.024
1.055
1.652
9
Eynsham
59.676
58.841
57.134
0.835
1.707
10
Kings
58.841
58.076
56.394
0.765
1.682
11
Godstow
58.076
56.509
54.882
1.567
1.627
12
Osney
56.509
54.617
52.477
1.892
2.140
13
Iffley
54.617
53.788
51.514
0.829
2.274
14
Sanford
53.788
51.099
49.798
2.689
1.301
15
Abingdon
51.099
49.210
47.689
1.889
1.521
16
Culham
49.210
46.802
45.180
2.408
1.622
17
Clifton
46.802
45.771
43.927
1.031
1.844
18
Days
45.771
44.193
42.217
1.578
1.976
19
Benson
44.193
42.321
40.191
1.872
2.130
20
Cleeve
42.321
41.419
39.246
0.902
2.173
21
Goring
41.419
39.645
37.069
1.774
2.576
22
Whitchurch
39.645
38.636
36.682
1.009
1.954
23
Mapledurham
38.636
36.585
34.512
2.051
2.073
24
Caversham
36.585
35.146
33.263
1.439
1.883
25
Sonning
35.146
33.512
31.607
1.634
1.905
26
Shiplake
33.512
31.967
30.068
1.545
1.899
27
Marsh
31.967
30.635
28.450
1.332
2.185
28
Hambledon
30.635
29.190
26.975
1.445
2.215
29
Hurley
29.190
28.142
26.267
1.048
1.875
30
Temple
28.142
26.911
24.777
1.231
2.134
31
Marlow
26.911
24.746
22.765
2.165
1.981
32
Cookham
24.746
23.448
20.943
1.298
2.505
33
Boulters
23.448
21.058
18.943
2.390
2.115
34
Bray
21.058
19.598
17.428
1.460
2.170
35
Boveney
19.598
18.126
15.974
1.472
2.152
36
Romney
18.126
16.121
13.503
2.005
2.618
37
Old Windsor
16.121
14.377
11.826
1.744
2.551
38
Bell Weir
14.377
12.561
10.314
1.816
2.247
39
Pentonhook
12.561
11.342
8.665
1.219
2.677
40
Chertsey
11.342
10.122
7.632
1.220
2.490
41
Shepperton
10.122
8.095
5.526
2.027
2.569
42
Sunbury
8.095
6.227
3.938
1.868
2.289
43
Molesey
6.227
4.380
1.963
1.847
2.417
44
Teddington
4.380
0.000
-1.079
4.380
1.045
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