Reply #90: Infrastructure Report Card 2005

[UpInArms]

http://www.asce.org/reportcard/2005/page.cfm?id=23&printer=1

excerpt:

Conditions

Like all man-made structures, dams deteriorate. Deferred maintenance accelerates deterioration and causes dams to be more susceptible to failure. As with other critical infrastructure, a significant investment is essential to maintain the benefits and assure the safety that society demands.

In the past two years, more than 67 dam incidents, including 29 dam failures, were reported to the National Performance of Dams program, which collects and archives information on dam performance as reported by state and federal regulatory agencies and dam owners. Dam incidents are such events as large floods, earthquakes or inspections that alert dam safety engineers to deficiencies that threaten the safety of a dam. Due to limited state staff, many incidents are not reported; therefore, the actual number of incidents is likely to be much greater.

The number of high-hazard potential dams (dams whose failure would cause loss of human life) is increasing dramatically. Since 1998, the number of high-hazard-potential dams has increased from 9,281 to 10,213, with 1,046 in North Carolina alone. As downstream land development increases, so will the number of high-hazard potential dams. As these dams often require major repair to accommodate more stringent inspection, maintenance and design standards, financial support for state dam safety programs must keep pace.

Even more alarming, states presently report more than 3,500 "unsafe" dams, which have deficiencies that leave them more susceptible to failure. Many states have large numbers of unsafe dams, including Pennsylvania (725), New Jersey (583), and New Hampshire (357). Many state agencies do not report statistics on unsafe dams; therefore the actual number is potentially much higher.

The combined effect of rapid downstream development, aging/non-compliant structures and inadequate past design practices, coupled with a predicted increase in extreme events, demands fully funded and staffed state dam safety programs, as well as substantial and proactive funding for dam repairs.

...more...

Crumbling infrastruction is already a major problem :(