Embankment dams, their zoning and selection - Geotechnical Engineering of Dams - page 324

Table 8.6. ANCOLD (1999) sample guidelines on the selection of the severity of damage and loss - Part A.

Type Negligible Minor Medium Major

1. Estimated costs
Residential Not expected Damage to one Destroy two houses or damage a About 10 houses destroyed

house number

Infrastructure $10 000 $10 000 to $1M $1M to $10M More than $10M

Commercial $10 000 $10 000 to $1M $1M to $10M More than $10M

Dam repair or replacement cost $100 000 $100 000 to $10M $10M to $100M More than $100M

Provision of temporary services to $10 000 $10 000 to $1M $1M to $10M More than $10M

replace those provided by dam
Cleanup within the flood affected $10 000 $10 000 to $1M $1M to $10M More than $10M

zone

2. Service and business relating to the dam
Importance to the business No effect Restrictions needed Restrictions needed during peak Essential to main supply

during dry periods days and peak hours

Effect on services provided by the Services can Minor difficulties in Reduced services are possible Services supplied by the dam are

owner easily be replacing services with reasonable restrictions. About essential and cannot be provided

replaced 80% of full supply for some months from another source

Severe restrictions would be applied
for at least one year

Practicality of replace the dam No impediment Some impediment Replace at a high cost to the Impossible to replace

community

Community resistance to None expected Some reaction but Severe widespread reaction Extreme discontent, high media

replacement, effect on continuing shortlived coverage, long term distrust

credibility, and political implications
Impact on financial viability None expected Able to absorb in Significant with considerable Severe to crippling in the long term

one financial year impact in the long term

Value of water in the storage $10 000 $10 000 to $1M $1M to $10M More than $10M