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SDAG Monthly Meeting
4th Wednesday - August 28, 2019

Location: Geocon Incorporated - Upstairs Lounge
6960 Flanders Dr
San Diego, CA 92121
Tel: (858) 558-6900

FROM INTERSTATE 805: Take the Mira Mesa Blvd (Exit 27) exit. Head east on Mira Mesa Blvd for roughly 2 miles. Turn right onto Flanders Drive and Geocon will be on your left in about 0.4 miles.

FROM HIGHWAY 15: Take the Mira Mesa Blvd (Exit 16) exit. Head west on Mira Mesa Blvd for roughly 3.3 miles. Turn left on Camino Santa Fe and then turn right on Flanders Drive. Geocon will be on your right in about 0.2 miles.

happy hour
5:30pm -
Social hour  

Menu: Mexican Buffet - Tacos, Rice and Beans, Chips, Horchata

6:30pm -

Cost: $35.00 for non-members, $30.00 for members, $20.00 for students.
if pre-registered by the deadline, $5 extra if you did not make a reservation. Click the SDAG member checkbox on the reservation form if you are a member.

Reservations: Make your reservation online by clicking the button below no later than NOON, Monday, August 26
Late reservations/cancellations are preferred over walk-ins or no-shows. Fees payable at the meeting or pre-pay with PayPal.
There also will be a phone credit card reader at the meeting.

If you are a current SDAG member and are not getting e-mail announcements,
make sure the SDAG secretary has your correct e-mail address.

7:30pm -

"A Tale of Two Subdivisions. From Hell. Desert View Drive and Soledad Mountain Road: A Case History of Lingering Geologic Hazards in Land Development in Southern California from a Regulatory Geologist's Perspective"

Speaker: Robert N. Hawk, PG, CEG, CHG, PE, & GE

Abstract: In 1959, a tract of land on the east side of Soledad Mountain was subdivided into lots and streets, and processed through the City of San Diego as an ordinary development. Designed by Wittman-Mann Engineers with the geotechnical observation of the grading done by Woodward-Clyde Consultants, the development was ordinary for that period of time in much of Southern California. Geologic evaluation was not typically performed nor required, and no geology licensure existed at the time. Although some firms like Woodward Clyde did have geologists on staff, it was also common practice simply to offer laboratory services such as compaction testing to land development operations without evaluating other aspects of the project. A few months following mass grading in 1961, a large landslide occurred destroying homes under construction. Following years of litigation, re-evaluation and redesign of the grading, the subdivisions were regraded to mitigate the landslide, and the project was built out in the early 1970's excluding the slide area. The landslide area was built out with residential homes in the 1980's. In 1985, the California Division of Mines and Geology (renamed the California Geologic Survey), mapped the area as an ancient landslide complex. In 1990, a new failure manifest in a portion of 5600 block Desert View Drive. In 1993, another separate landslide developed in the 5800 block of Desert View Drive. In October of 2007, a massive landslide destroyed 6 homes on the 5700 block of Soledad Mountain Road, and rendered over 100 temporarily uninhabitable due to utility destruction. In 2015, a geologic investigation for a storm drain replacement by the City of San Diego discovered portions of yet another ancient landslide underlying homes on other portions of the development. Unfortunate events/ poorly designed developments like this one have occurred in many parts of the country prior to the science of geology being applied to civil/geotechnical engineering, and continue to currently play out in other states where development has encroached into more difficult topography/geology and where geologic hazards have not been adequately addressed. This talk will focus on the sequence of events leading to problems on this development; and how those hazards can be managed by the municipality protect utilities, services and public liability for constituents from the perspective of a former agency geologist.

Rob Hawk earned his BSc in Engineering Geology from SDSU in 1980. He was enrolled in graduate studies in Civil Engineering at CSULB while working as a geotechnical consultant in Orange County and became licensed. He completed his MSc in Hydrogeology at SDSU in 1993.

Mr. Hawk has experience with a variety of geotechnical projects in the Southern California area for the past 39 years. As a private geotechnical consultant, he has participated in, or managed preliminary geotechnical investigations and in-construction review for hillside, residential, and commercial development in Los Angeles, Orange, and San Diego Counties, as well as highway bridges in Imperial County. He has also worked on landfill evaluation and liner design. In rural development, he has provided groundwater resource evaluations, water budgets, and development of extraction wells. He also serves as a subject matter expert in litigation and arbitration of disputes.

Mr. Hawk has worked in the public sector for the City of San Diego as a Senior Engineering Geologist and Deputy City Engineer for over 20 years in various departments including Engineering and Capital Projects, Development Services, and Building Inspection. He retired from the City in 2009, although he continued to work an additional 10 years for the City of San Diego Public Works as a provisional Senior Geologist and designated Deputy City Engineer for special projects. He has worked on the Soledad/Desert View development landslides since 1990. He currently is in private practice in geology and geotechnical engineering as a Principal Geologist at TerraCosta Consulting Group, and teaches Engineering Geology as a lecturer and mentor at San Diego State University. He is a licensed in California as a Professional Geologist, Civil -, and Geotechnical Engineer, and is both a Certified Engineering Geologist and Hydrogeologist.

Upcoming SDAG meetings - 2019

September: NO MEETING (Field Trip September 27 - 29)

October 16: Ron Blakey - "Cenozoic Paleotectonics and Paleogeography of the Southwest Margin of North America", Old Spaghetti Factory - San Marcos

November - TBD

Meetings are usually scheduled for the 3rd Wednesday evening of the month. Meeting information on this website is normally updated the second week of the month.

If you have any information, announcements, ads or suggestions for an upcoming newsletter, please submit it to 2019 SDAG Secretary. Any news regarding upcoming events that may be of interest to the Association or news of your business can be submitted. The submittal deadline for the next SDAG newsletter is the last Friday of the month.
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