MONTHLY DINNER MEETING
Date: Tuesday, February 10, 2004
Location: Steven’s Steak House, 5332 Stevens Place, Commerce,
Time: 6:00 p.m.-Social Hour; 7:00 p.m.-Dinner; 7:45
Cost: $25 per person with reservations, $30 at the door, $12 for students with a valid Student ID
Reservations: Call (949) 253-5924 ex 564, or email Brian Villalobos,
By 5:00 p.m., Sunday, February 8, 2004
SPEAKER: Mr. David Simon, AEG President
TITLE: “A Truly Viable Association Once Again” and “Holocene Faulting Near Piute Dam, Piute County, Utah”
Three years ago the Board of Directors and Executive Council became painfully aware of two fundamental facts: 1) that significant
change and reorganization was necessary for the financial survival of the Association, and; 2) implementation of change was required
immediately. These changes began during Myles Carter’s term (2001-2002), were carried on by Scott Burns’ (2202-2003), and continued
into my term as President (2003-2004). The changes included the establishment of our new headquarters in Denver, formation of a new
publications board, development of a new fiscal year, creation of new awards, inauguration of the first Shlemon Specialty Conference
(May 31-April 3, 2004), electronic publishing of the Environmental and Engineering Geoscience Journal (“GeoScience World”), placing
the AEG’s Geology of the Cities of the World and selected Special Publications on CDs, development of new Vision, Values, and Mission
statements for the AEG, and implementation of new strategic plans for our Engineering Geology Foundation and the AEG.
Today we can proudly notify the membership that the Association is financially healthy and governance is at an unparalleled level of excellence.
The Board of Directors and Executive Council have successfully developed a governance structure that once again represents the
membership nationally. Current AEG President David Simon will summarize the changes of the past few years, present a summary of
Association finances, discuss the goals of the recently completed Strategic Plan, and the value of why all members should contribute
to the Engineering Geology Foundation.
We document a previously unrecognized Holocene fault close to the 95-yr old Piute Dam, a 27-m high earthfill structure on the Sevier
River, 7 km north of the town of Junction in Piute County, Utah. The fault trends northwest, is about 6 km west of the probable
Holocene, Northern Sevier Fault (NSF), and is informally named the “Piute Dam Access Road Fault” (PDARF) based on proximity to Piute
Dam. Trench exposures, soil-stratigraphic dating of regionally extensive fluvial fill terraces, and paleo-hydrologic age assessments
indicate that the PDARF was the locus of at least four paleoseismic events in about the last 35 ka. Apparent vertical displacements
range from 2.5 to 15 cm, with recurrence of about 8 ka. The most recent 2.5 to 5 cm offset took place approximately 8 ka ago.
The penultimate event likely occurred about 14-18 ka ago; and two pre- penultimate displacements probably took place about 24 and 32
ka ago, respectively.
The northwest trend and apparent component of right-lateral slip suggests that, in the present regional stress regime, the PDARF
responds co-seismically with earthquakes along nearby faults of more regional tectonic significance, such as the NSF and the adjacent
Piute Reservoir Fault Zone. The relatively small slip per event indicates that the PDARF probably responds only to approximately M
6.5 or higher (general threshold for surface rupture) earthquakes along the more regional faults. The PDARF slip history is therefore
one of relatively frequent but low magnitude displacements in late Quaternary time.
David B. Simon, 2003-2004 AEG President – Mr. Simon is a Southern
California native that holds a BS from the University of California at Santa Barbara. He began his consulting career locally,
and now has over 22 years of experience as a Consulting Engineering Geologist. He is currently a Principal Partner with the firm of
Simon - Bymaster Inc., a Geologic, Environmental, and Geotechnical Consulting firm in Salt Lake, Utah, where he can regularly
practice his other passion - skiing.
His professional registrations include: Certified Engineering Geologist, California; Registered Geologist, California, and
Professional Geologist, Wyoming. Mr. Simon’s professional activities include: AEG - Program Committee Chairperson - Utah Section
1993-95; Chairperson - Utah Section 1995-97; Board of Directors - Utah Section 1997-99; Short Committee Chairperson - Utah Section
1999-Present; Co-Chairman of the 42nd Annual Meeting of Salt Lake City, Utah, September 1999; Field Trip Leader Kennecott Mine Field
Trip, 42nd Annual Meeting of Salt Lake City, Utah, September 1999; FEMA Project Impact 2000 Programs – Washington, D.C., invited
speaker, Salt Lake City, Natural Hazards Ordinance Committee & Earthquake & Liquefaction Committee; Committee Member, Utah
Geological Survey Geologic Mapping Division Advisory Committee, 1997-99; Invited Speaker, BYU Geological Science Department’s
Distinguished Lecture Series, 1999; AEG’s Executive Council, 2000 - Present.