VARIABLE PARAMETERS
(Dam vulnerability numerical values)
Dam age
__________________________
Concrete Dam
__________________________
Age
(years) Points
__________________________
This category includes the following dam types:
0 1 concrete gravity, concrete gravity embankment,
__________________________ concrete arch, stone-filled or earth-filled steel
sheet-pile cribs, concrete buttresses, free weir -
5 1.5 concrete shield, rockfill dam with concrete facing,
__________________________ steel sheet-piling.
10 2 The points for intermediate dam ages shall be
__________________________ determined by considering that the points vary
linearly between the various age values.
20 3
__________________________
40 7
__________________________
50 9
__________________________
55 and over 10
__________________________
__________________________
Embankment Dam
__________________________
Age
(years) Points
__________________________
0 8
__________________________
5 7.5 This category includes the following dam types:
__________________________ concrete barrier or steel sheet-piling upstream of
earthfill dam, rockfill dam with upstream
10 6.5 earthfilled core and earthfill.
__________________________
The points for intermediate dam ages shall be
15 5 determined by considering that the points vary
__________________________ linearly between the various dam age values.
20 4
__________________________
25 3
__________________________
30 2.5
__________________________
40 2
__________________________
50 1.5
__________________________
60 and over 1
__________________________
__________________________
Timber Dam
__________________________
Age
(years) Points
__________________________
This category includes the following dam types:
0 1 stone-filled or earth-filled timber cribs and timber
__________________________ buttresses (cribs or dead shores).
5 1.5 The points for intermediate dam ages shall be
__________________________ determined by considering that the points vary
linearly between the various dam age values.
10 2
__________________________
20 8
__________________________
30 and over 10
__________________________
__________________________
Rockfill Free Weir
__________________________
Age
(years) Points
__________________________
This category includes the following dam types:
≤5 5 rockfill free weir and rockfill weir.
__________________________
The points for intermediate dam ages shall be
10 6 determined by considering that the points vary
__________________________ linearly between the various dam age values, except
a dam of 5 years or less, which is always assigned
15 7 5 points.
__________________________
20 8
__________________________
25 9
__________________________
30 and over 10
__________________________
Seismicity
__________________________
Seismic Zone Points
__________________________
1 1
__________________________
2 1
__________________________
3 2
__________________________
4 6
__________________________
5 8
__________________________
Reliability of discharge facilities
__________________________
Reliability Points
__________________________
Satisfactory 1
__________________________
Acceptable 5
__________________________
Unsatisfactory
or undetermined 10
__________________________
Dam condition
__________________________
Condition Points
__________________________
Very good 1
__________________________
Good 3
__________________________
Acceptable 5
__________________________
Poor or undetermined 10
__________________________
Very good: The dam does not show evidence of any deficiency or has minimal confined deterioration considered normal or of no consequence.
Good: The dam shows evidence of only minor deterioration or deficiencies that do not affect the proper operation of its components.
Acceptable: The dam shows evidence of deterioration requiring repairs without however immediately endangering the structure; a dam in this state requires maintenance and repair work in the immediate or near future without which the dam would become increasingly vulnerable. The dam may also show evidence of deficiencies which do not affect its immediate safety but which require close monitoring.
Poor or undetermined: The dam shows evidence of single or multiple severe deterioration that could affect its stability or make certain parts inoperable, or the dam shows evidence of serious deficiencies likely to endanger its safety or the condition of the dam cannot be ascertained.