Weir |
Weir Crest Width (m) |
# of keystones |
Range of Keystone Sizes
(m) |
% Fish Passability (Low Water Level) |
% Fish Passability
(Intermediate Water Level) |
% Fish Passability (High Water
Level) |
1 |
1.9 |
5 |
0.2 – 0.8 |
100 |
100 |
100 for </= 4
species |
2 |
3.1 |
8 |
0.4 – 1.1 |
0* |
100 for </= 4 species |
100
for </= 4 species |
3 |
2.2 |
4 |
0.6 – 0.8 |
100 |
100 |
100 for </= 4
species |
4 |
2.4 |
3 |
0.6 – 1.3 |
100 |
100 for </= 4 species |
100 |
5 |
3.6 |
9 |
0.5 – 1.0 |
100 |
100 |
100 |
6 |
3.5 |
9 |
0.6 – 1.1 |
100 |
100 for </= 4 species |
100 |
7 |
3.3 |
8 |
0.2 – 1.1 |
100 |
100 |
100 |
8 |
3.5 |
9 |
0.2 – 1.3 |
100 |
100 |
100 |
9 |
2.7 |
6 |
0.3 – 0.7 |
100 |
100 |
100 for </= 4
species |
10 |
2.5 |
7 |
0.2 – 1.0 |
100 |
100 for </= 4 species |
100 |