Leakage is a major safety issue
that, if left unchecked, may result
in dam failure by various
mechanisms. There is enormous
pressure on dam operators to repair
leaks without significant delays.
Frequently, the need to reduce the
risk of failure or control water
loss has led to costly remedial
repairs that are planned and
executed without a complete
understanding of the problem. A lack
of appropriate leakage investigation
and monitoring can result in repairs
that are unsuccessful in controlling
or reducing leakage.
In the last few decades, a series of new techniques have been developed to help in the assessment of leakage and seepage in dams. It is important to make these techniques available to the engineers responsible for dam construction and management so that they become aware of these tools. The available literature on dam leak studies is relatively limited with regard to the use of these techniques when assessing dam leakage. It is difficult to find case studies that discuss integrating the use of several of these techniques in comprehensive evaluations that lead to successful leakage mitigation. These techniques allow identification of recharge zones, preferential paths, and transit times, which aid in monitoring and mitigating the dam leakage.
The presentation includes description of the techniques and several projects in the United States and abroad involving prevention and detection of dam and reservoir leakage, including leakage evaluation, analysis, design, construction, and post-construction verification of repairs.
Bethany Kelly joined Barr in 2007 with a master's degree in geological engineering from Montana Tech of the University of Montana. Her key geotechnical engineering interests include slope stability analysis and design; hydrogeologic investigation, analysis, and remediation of seepage impacting stability; liquefaction stability assessments; "special soils" (e.g., brine-impacted and contaminated); rock wall design; and geotechnical monitoring instrumentation.
Iván Contreras was born and raised in Venezuela, earned a doctorate in civil engineering (geotechnical engineering) from University of Illinois at Urbana-Champaign, and has more than 25 years of experience in geotechnical engineering on a wide variety of projects in the United States, Canada, Mexico, and Venezuela. These projects range from the design of small reservoirs to the detailed design of oil-storage-tank foundations and slope stability remediation. He has designed and performed safety reviews, dam performance evaluations, construction observation, long-range planning, and comprehensive geotechnical investigations.
Meeting Schedule and Logistics:
Social time and lunch
(if you so desire) will be from 11:30 AM to
12:30 PM in the dining
room of the Officers Club.
- The Club’s cafeteria-style lunches
are typically $10.00 or less; people who
partake in the cafeteria-style lunch
will pay the Officers Club directly.
If you come only for the presentations,
there is no charge.
Post Meeting and
Presentation will be from
12:30 PM to about
1/2-PDH for this Presentation.
Please RSVP with your intent to either
partake in the cafeteria-style lunch or to
come for the presentation only; this will
help the Officers Club staff to ensure that
an adequate amount of food is prepared.
Either leave a voice mail message with
Michelle Larson at 651-290-5632, or click
the RSVP button in the left-hand column, or
send an email message to
Fort Snelling Officer's Club near Post Road.
See map at: http://www.same-msp.org/_images/934thOfficersClub.jpg