Oklahoma Water Resources Board the Water Agency


Dam Safety Quarterly
Dam Safety Quarterly

Workshop: Common Repair Method & Upgrades for Dams

Wednesday, September 30, 2015
Oklahoma Water Resources Board
3800 North Classen Boulevard
Oklahoma City, OK 73118
8:00 a.m. to 3:30 p.m.
Download Registration Form

This six hour course hosted by the OWRB and presented by Frees and Nichols will cover the following topics:

I. Evaluation of Existing Dams: Visual Inspections, Monitoring/Instrumentation, Basics of Geotechnical Investigations

II. Failure Modes, Risk Factors & Consequences: Earthen Embankment Basics, Concrete/Gravity Dam Basics, Slab-and-Buttress Dam Basics, Types of Failure Modes & Analysis, Seismic Potential

III. Common Repair Methods & Upgrades: Seepage, Uplift/Heave, Slides/Stability/Erosion, Hydraulic Upgrades, Construction Considerations

The course is presented by Marc Miller and Mike Shiflett of Frees and Nichols, Inc. Mark Miller, P.E. is a Senior Geotechnical Engineer with the company’s Water Resources Design Group. Mr. Miller has over 20 years of experience in geotechnical investigations, laboratory testing, analysis, design, and construction of heavy civil infrastructure projects. He specializes in the evaluation and design of earthen dams, levees, and embankments, including seepage modeling, slope stability modeling, and failure modes analyses. Mike Shiflett, P.E. is a Senior Geotechnical Engineer in Freese and Nichols, Inc.’s Water Resources Design Group. Mr. Shifflett has over 40 years’ experience serving as the principal investigator, project manager, and design engineer for numerous geotechnical projects including dam, levee system, transportation, facilities, and water/ wastewater projects. His technical expertise includes slope stability analyses, lateral load analyses, high capacity pier/pile analyses, failure mode analyses, and risk assessments.

The workshop fee is $30 for attendees who reserve their seat by Monday, September 28. Breakfast and lunch will be provided. Engineers may earn six (6) Professional Development Hours (PDH) for this course.


The OWRB coordinates the Oklahoma Dam Safety Program to ensure the safety of more than 4,700 dams in the state. The Program requires inspections for all jurisdictional size dams based on the presence of downstream development.

Hazard-Potential Classification Risk Involved with Dam Failure Inspection Frequency

High

probable loss of human life

annually, by a registered professional engineer

Significant

no probable loss of human life but can cause economic loss or disruption of lifeline facilities

every three years by a registered professional engineer

Low

no probable loss of human life and low economic loss

every five years


In addition, owners of high hazard dams are required to have an emergency action plan (EAP) in place. Copies of the EAP must be submitted to local law enforcement agencies and emergency management officials. OWRB staff require submittal and subsequent approval of plans and specifications prior to all new dam construction and modifications to existing dams.



Interactive Dam Inventory Viewer




Past Workshops



Hydraulic Modeling


This December, the OWRB’s Dam Safety Program hosted a Hydraulic Modeling Workshop at our Oklahoma City office. Thirty eight people representing private sectors, state and local government agencies attended the class. In the morning section, Mr. Marc Johnson, PE, CFM from FTN Associates, Ltd introduced the participants to basics of 1D and 2D modeling along with their computational requirements, cost and complexities. Common engineering assumptions, labor and hardware requirements along with the accuracy of the outcomes for different models were also evaluated.

During the afternoon session led by Mr. Lee Beshoner, PE, CFM from FTN Associates, engineers were introduced to case studies using the new HEC-RAS 2D model. Required computational, involved assumptions along with the model’s preliminary results were reviewed. Throughout this section, participants shared their technical opinions and had the opportunity to contest the assumptions and outcomes of the model.



Emergency Action Planning for Dam Owners


OWRB conducted free Emergency Action Plan (EAP) workshops in Oklahoma City and Tulsa this July. Forty seven participants - including private dam owners, home owners associations, engineers, law and enforcement officers and emergency managers - gathered to benefit from lectures conducted by representatives from the National Weather Services (NWS), National Resource Conservation Service (NRCS) and OWRB. The workshops emphasized the importance of the EAP and its regular maintenance, defining emergency processes and related actions, roles of NRSC and NWS in improving or simplifying the emergency action plan, and reviewing OWRB rules and regulations. During the workshops, beneficial ideas were exchanged and means of communications were established amongst the attendees which could be advantageous in achieving the OWRB’s goal of keeping our state’s dams safe.

If you were unable to attend one of these workshops and would like a copy of the course materials, please email Emma Moradi or call (405)530-8800.






Hydrology for Dam Safety


Hydrology for Dam Safety Technical Seminar

In April, the OWRB hosted the Hydrology for Dam Safety technical seminar at the Sheraton Hotel in downtown Oklahoma City. Twenty-two engineers attended the seminar, including many from private firms as well as municipal, county, state, and federal agencies. The course, led by Dr. Baxter Vieux and Dr. Jonathan Looper, focused on the standard methods of hydrological calculations with an emphasis on applying them to dam safety studies and design. Topics included watershed characterization, developing the probable maximum storm hyetograph for a particular region, understanding appropriate applications for various routing and transform methods, and using HEC-HMS computer modeling to demonstrate hydrological principles and analysis techniques.




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