AUGUST 8 - LAUNCH DAY FOR FITZSIMONS STORMWATER OUTFALL TUNNEL
Brierley Associates teamed with the pipeline designer Carollo for this important asset
construction program that involves over 10,000-ft of storm sewer pipe
with diameters ranging from 54-in to 94-inches. Brierley Associates
developed the subsurface characterization program and the Geotechnical
Baseline Report. Work Package #1 will be completed by BT Construction
using a 51-inch diameter Akkerman MTBM to tunnel beneath East Colfax
Ave, a major thoroughfare. This reach employs an innovative strategy to
complete two bores from one 30-ft diameter by 30-ft deep launch shaft.
I-35W STORMWATER STORAGE FACILITY- MINNEAPOLIS, MN
Tom Pullen, MSCE, Geotechnical Engineer
Wet weather events in
Minneapolis have at times created surcharging of the existing stormwater
tunnels to the point where manhole lids are blown off by water force
and causing a hazard to I-35W travelers. Recognizing the need to
mitigate these occurrences, Minnesota DOT went through a series of
preliminary assessments. In 2017, the team of Brierley Associates, Barr
Engineering and TKDA was selected by MnDOT to design a subsurface
stormwater storage facility along I-35W south of Minneapolis, that will
also provide flood relief of an existing low area near 42nd street.
The final design is
comprised of six 45-ft diameter by 90-ft deep somewhat circular
interconnected cells to provide over 4.5 million gallons of storage.
Given the limited space along I-35W, the cells will be constructed using
diaphragm wall methodology.
Brierley Associates is the
Engineer-of-Record for the underground design components including the
six interconnected diaphragm wall cells.
Construction is scheduled to
commence in 2020 and will be executed through MnDOT Construction
Manager General Contractor (CMGC) project delivery. During
construction a monitoring program will be utilized to monitor in near
real-time groundwater, movement, and stresses during construction and
throughout the life of the structure.
Click here for a video rendering of the project (Courtesy of Barr Engineering).
BASSETT CREEK TUNNEL - MINNEAPOLIS, MN
Kurt Breitenbucher, Geotechnical Engineer
The Bassett Creek Tunnel
conveys stormwater beneath downtown Minneapolis and ultimately
discharges to the Mississippi River. With depth of cover ranging from
12- to 20-ft, this 1.7-mile long, 11-ft by 11-ft, double box, cast
in-place-concrete tunnel is generally within fill, but in some areas the
haunches approach the edge of the weakly cemented St. Peter
Sandstone where the alignment adjoins a buried river valley.
Brierley Associates was retained by the City of Minneapolis under our
Consultant Pool Project Delivery Agreement to assess 2,000-ft of the
tunnel to develop an understanding of how it would react to the loading
imposed by the planned Southwest Light Rail Expansion, tail track for
the Northstar Line.
Our services were initially
focused on record drawing assessment, field measurements and
observation. The collected data allowed Brierley to utilize Midas GTS to
model tunnel reactions when loads were imposed by passing trains. Once
the data was in hand, we evaluated the dynamic loading and found the
tunnel can adequately withstand future train loads. However, Brierley's
understanding of the subsurface conditions led to a differential
settlement analysis, which resulted in a ground modification design to
mitigate the potential tunnel deflection.
Construction of the
Southwest Light Rail is now underway, and Brierley is serving as the
City of Minneapolis' Tunnel Representative. During construction,
monitoring will include: visual inspection; survey of surface monitoring
points and tunnel crack gauges. Installed across the tunnel shear keys,
the crack gauges are in arrays of 6, one on each wall of both barrels,
and one on each barrel crown. Brierley will review and assess the
instrumentation data, keep the City informed of tunnel performance and
make periodic site visits for the duration of work near the Bassett
BREAKTHROUGHS IN TUNNELING SHORT COURSE
Denver, CO - September 9-11, 2019
Kenny Construction - a Granite Company, partnered with Obayashi
DLZ (lead design), McMillen Jacobs (underground horizontal/tunnels), COWI (shafts), GPD
Brierley Associates provided Construction Engineering Design to Kenny and Schnabel Foundation
(ground improvement), Northstar (shafts), Turn-Key Tunneling (connector tunnel),
Robbins (TBM with VMT guidance system), CSI (segments), Condat (tailshield grease), Medina Concrete (shotcrete)
All attendees are invited to the Tunnel Achievement Awards Reception
, Tuesday, September 10th, from 5:15 - 7:00 PM.
ROCKY MOUNTAIN WATER CONFERENCE
Keystone, CO September 8-11, 2019
The Rocky Mountain Water
Conference is a joint meeting of the Rocky Mountain Section of the
American Water Works Association (RMSAWWA) and Rocky Mountain Water
Environment Association (RMWEA). More than 120 exhibitor booths
and numerous technical sessions and learning opportunities are scheduled
including Brierley's Sarah Myers and Kyle Friedman who will be
presenting Tunnel Engineering for the North Greeley Sewer Line.
NAAMLP | PA AMR | NASLR 2019 CONFERENCE
Pittsburgh, PA September 8-11, 2019
This year's National
Association of Abandoned Mine Land Program's (NAAMLP) 41st
Annual Conference will be conducted jointly with the Pennsylvania
Abandoned Mine Reclamation (PA AMR) and the National Association of
State Land Reclamationists' (NASLR) Annual Conferences. These three
organizations share common goals and interests focused on successful
reclamation and environmental restoration of previously and currently
mined sites. The multi-organization platform will provide conference
attendees a broad range of mining and reclamation topics and issues as
well as increased networking opportunities. The conference will be held
at the Wyndham Grand Downtown Pittsburgh Hotel, September 8-11, 2019.
Brierley's Dr. Mohamed Gamal and Dave Hibbard will be attending. Stop by and visit them at Booth #26.
ASSOCIATION OF STATE DAM SAFETY OFFICIALS (ASDSO)
Orlando, FL September 8-12, 2019
This year's event at
the Loews Royal Pacific Resort will bring together nearly
1,000 dam and levee safety professionals from across the country and
globally for a week of networking, knowledge transfer, and community
building. With 2 general sessions, 38 concurrent sessions packed
with over 115 presentations to choose from, and over 100
exhibitors. Dam Safety 2019 is the showcase event of the year for dam
and levee safety professionals.
Brierley's Steve Kuehr, and Ryan Schoolmeesters, Dam Safety Engineer, CO Division of Water Resources will be presenting Use of a Geosynthetic Clay Liner to Rehabilitate the Lower Chinns Dam, Clear Creek County, on Monday September 9, 2019.
COLORADO ASSOCIATION OF STORMWATER AND FLOODPLAIN MANAGERS (CASFM)
Crested Butte, CO September 24-27, 2019
2019 Colorado Association of Stormwater and Floodplain Managers (CASFM) Annual Conference
will be held
September 24-27, 2019
in beautiful Crested Butte at the
Crested Butte Mountain Resort.
Mountain Region's preeminent conference for unparalleled workshops,
presentations, networking and learning opportunities with Stormwater,
Floodplain, and Water Quality professionals from across the Rocky
2019 CUTTING EDGE CONFERENCE - ADVANCES IN TUNNELING TECHNOLOGY
Miami, FL November 18-20, 2019
This November the eighth annual Cutting
Edge Conference convenes in Miami, Florida to examine the latest
advances in tunneling technology and construction methods and how they
can be harnessed to successfully deliver the nation's major upcoming
underground projects. The Cutting Edge Conference features a tailored,
high-end, single-track program of subject-specific presentations that
focus on innovation and practical experience, as well as extended
in-depth industry discussion sessions, which have become a trademark of
TUNNEL BORING MACHINES IN DIFFICULT GROUNDS
4TH INTERNATIONAL CONFERENCE
Golden, CO November 14-15, 2019
TBM DiGs is an international conference
series that provides a specialized technological forum to discuss and
exchange knowledge related to TBM works in difficult ground. TBM
DiGs will be held November 14-15, 2019 and is jointly organized by
several universities and organizations involved in the tunneling
SAVE THE DATE!
ENGINEERING GEOLOGY FOR SUBSURFACE WORKS
Golden, CO November 21, 2019
Brierley Associates, Dr. Mole, Inc and
the Association of Environmental & Engineering Geologists (AEG) and
the Colorado School of Mines presents....Engineering Geology
for Subsurface Works.
Join us November 21, 2019 at 6:00 PM in the Colorado School of Mines - Student Center Ballroom as:
- Mr. Sean Sundermann presents Engineering Geology and Geohazard Characterization for Cross Country Pipelines;
- Dr. Gary Brierley presents Engineering Geology For Tunneling Projects; and,
- Dr. Mark Diederichs presents Engineering Geology and Observational Design in the Andes: The Good, the Bad and the Ugly.
SAVE THE DATE!
RISK MANAGEMENT IN UNDERGROUND CONSTRUCTION
Brierley Associates and Dr.
Mole, Inc. are Main Event Gold Sponsors of the 2020 edition of Risk
Management in Underground Construction to be held in Houston, TX this
Risk management is an
important issue when it comes to successfully completing modern tunnel
and other large scale underground construction projects. Without the
open discussion of the potential risks between all parties and an
understanding of these risks in advance, projects can become involved in
disputes that benefit no one.
stakeholders from all facets of the industry, including: contractors,
owners, consultants, insurance companies, vendors, and law firms for a
unique two-day event that fosters learning through open discussions and
BRIERLEY ANNOUNCES ITS NEW OFFICE IN NORTHBOROUGH, MA
Located at 44 Bearfoot Rd.,
Suite 100B, Northborough, MA 01532 is our second Boston area office and
is managed by Dr. Don Wotring. With more than 20-years of domestic and
international experience as a Project Manager and Tunnel Engineer, Dr.
Wotring is a welcome addition to Brierley Associates. Don's experience
includes tunnels and underground structures for transportation and
water/wastewater facilities, as well as other geotechnical and
structural underground construction projects. Dr. Wotring can be reached
at 508.919.8651 or email@example.com.
Jeffery Derosier, CADD
Manager, is also located in our Northborough office. Jeff has more than
30-years of progressive CADD and complex design package preparation for
surface and underground heavy civil projects. Additionally, Geologist
James Duffy has relocated from our office in Cambridge, MA to
BRIERLEY'S NEW ABANDONED MINE LANDS (AML) OFFICE
To support our ongoing
Abandoned Mine Lands work in Wyoming and upcoming opportunities,
Brierley Associates has established a new office at 1482 Commerce Drive,
Unit A, Laramie, WY 82070. Joel James, who recently joined
Brierley has relocated to operate that office. Mr. James
has over ten years of
combined experience as a project manager, superintendent, civil
engineer, estimator, and operator. He specializes in foundation design,
hydraulic engineering, tunnel design, slope stabilization and
Joel may be contacted at 307.343.1149 or firstname.lastname@example.org.