Serving professionals in engineering, environmental, and groundwater geology
since 1957

MONTHLY DINNER MEETING

Date: Tuesday, February 10, 2004
Location: Steven’s Steak House, 5332 Stevens Place, Commerce, CA
Time: 6:00 p.m.-Social Hour; 7:00 p.m.-Dinner; 7:45 p.m.-Presentation

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”


ABSTRACT

First Talk
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.

Second Talk
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.

BIO

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.