- Trinidad, Colorado
Bill Zietlow, PE - Denver, CO
Situated at the base
Sangre de Cristo Range, near the New Mexico
border is Trinidad, Colorado. This area of Colorado is within the Raton
Basin, which contains significant reserves of coal bed methane. Natural
gas extraction in the foothills west of Trinidad
major economic contributor to the regional economy. Regionally,
during the first six months of 2017, total precipitation was about 50%
more than average. Then, in August 2017 a sudden ground movement
occurred which disrupted the use of an unpaved access road that hugs
the side of a canyon. The landslide was approximately 200-ft long
and somewhat parallel to the roadway, with a more active center portion
about 100- to 150-ft wide.
EBMUD CARISBROOK RESERVOIR ROOF
David Berti, PE, SE, Senior Consultant: Brierley Associates
- Moraga CA
Greg Overhage, Project
Manager: Sierra Mountain Construction - Sonora, CA
East Bay Municipal
Utility District (EBMUD) has a history of providing high-quality
drinking water for 1.4 million customers in Alameda and Contra Costa
counties in the San Francisco Bay Area. EBMUD decided to replace its
three million-gallon Carisbrook concrete
reservoir with a smaller prestressed concrete
reservoir and use the post-tensioned walls of
the old reservoir as permanent retaining walls. Sierra Mountain
Construction was low bidder on the project in the Oakland (CA) hills.
Work included removing the roof and columns of the 159±-ft inside diameter tank prior to installing
wall-strengthening rebar and shotcrete, cutting a hole in the wall,
grading, and installing new structures inside the walls.
ASSOCIATION OF STATE DAM SAFETY
OFFICIALS (ASDSO) Inspection and Assessment of Dams
Hoffman, PE, SE is a recent graduate of the ASDSO three-day training
seminar on dam inspection and assessment in Sacramento, CA. The
training was comprised of topics on safety, design practices,
construction methods, inspection, evaluation and
assessment of various dam types. Numerous case studies of dam failures and distress were
used to illustrate the importance of monitoring and assessment. The
seminar also included recommended inspection methods for large and
small dams that satisfy state and federal regulatory requirements.
During the course, inspection technologies such as ROV, drone, and
sonar were used for hands-on demonstrations.
For more information about ASDSO dam inspections, Seth may
be contacted in our Chicago office at 312.432.0076 ext. 2445 or by
email at email@example.com.
Brierley Associates (Gold Sponsor) -
Brierley's AJ McGinn, Alan Howard, Gregg
Sherry, Nancy Nuttbrock, Danny Maine, Jeremiah Jezerski, David Kwietnewski and Jacob Mitchell
will be attending the NAT Conference, June 24-27, at the Washington
Marriott Wardman Park hotel. The
conference technical program focuses on the current challenges and
successes of tunneling projects throughout North America.
Our Core Purpose
Brierley Associates delivers intrinsic,
recognizable value to our owner, A/E firm, and contractor clients by
focusing on constructability, efficiency and practicality. Our
geotechnical and structural design and consulting services are founded
on a keen understanding of our clients' needs, subsurface conditions,
site-specific constraints, and the risks associated with the
construction of tunnels, underground facilities
and heavy civil infrastructure projects.
Underground - Coast to Coast