PUB00008

• Year: 2005
• Title: State Engineer's 20th Annual Report on Dam Safety
• CWCB Section: Finance
• Author: Division of Water Resources
• Description: State Engineer's 20th Annual Report on Dam Safety
• Publications - Doc Type: Other

3.0 PROGRAM ACCOMPLISHMENTS

3.1 General

The effectiveness of a program can be demonstrated by producing a positive result or
accomplishment. For fiscal year 2003-2004, the Dam Safety Program achieved a great number
of goals and objectives in the design review and inspection of dams. Although dam safety
incidents were reported this year, because of our program, these incidents resulted in reduced
consequences with no loss of life or significant property damage. This is attributed to the
increased awareness ofthe dam owners to be responsible for their dams, including emergency
preparedness planning, and to the enforcement of the regulations, policies, and procedures by our
office.

No emergency incidents occurred during the reporting period. However, as is typical, a number
of dams experienced serious problems during the period. Due to the drought conditions that
affected the entire state and the subsequent wet spring, many reservoirs that had been dry or
substantially lower than in past years resulted in the drying of their associated embankments.
The relatively wet spring caused many of these reservoirs to fill quickly. This rapid filling of
several reservoirs lead to excessive seepage through the dams that had experienced drying and
cracking of the embankment materials. This led to a rather large number of safety concerns
identified this year. However, due to the rapid response and quick thinking of our dam safety
engineers, none of the concerns developed into emergencies incidents that could have lead to
loss oflife or property damage. Problems reported this year include;

. Nofstger Dam, Division 6, Class 3 - Construction for breach and outlet repair, nothing
yet in writing.
. Ellgen #2 Dam, Division 6 - Severe wave erosion, blocked spillway causing toe erosion.
. Haunted Spring Dam, Division 6 - Piping at toe.
. Basset #2 Dam, Division 6 - Piping found near left toe.
. Sellars-Crowell Dam, Division 6 - Severe spillway channel erosion and backcutting.
. Shaffer Dam, Division 6 - Rodent hole through dam.
. Dunckley-Dubeau Dam, Division 6 - Long-term spillway channel erosion has reduced
freeboard.
. Lower Cogdill Dam, Division 6 - DIS landslide on top of old landslide.
. Wyman Dam, Division 6 - Grout around outlet slip lining is leaking water with very little
head.
. Palisade Cabin Dam, Division 5 - Cracked RCP outlet conduit and poorly compacted fill
along conduit.
. Fisher Canyon Dam, Division 2, Class 1 - Excessive seepage and stability concern,
reservoir lowered for investigations.
. Bennett Dam, Division 6, Class 3 - Piping along outlet conduit, voluntary restriction.
. Larson #1 Dam, Division 6, Class 3 - Piping along outlet conduit, voluntary restriction.

At the conclusion of the reporting period, there were 186 dams restricted from full storage due to
various structural deficiencies such as significant leakage, cracking and sliding of embankments,

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