Underground Construction - June 2020 - 8

NEWSLINE LATEST INDUSTRY DEVELOPMENTS
DC Water's Tunnel Boring Machine Reaches Key Project Milestone
DC Water's giant tunnel boring machine, named Chris, broke through a wall of concrete to reach the
W Street shaft, a key milestone in the mining of the Northeast Boundary Tunnel (NEBT) project.
Chris will rest for a bit in the shaft and get much-needed maintenance before resuming work.
Excavating through clay and sand, Chris the machine is on a five-mile-long underground journey
digging the NEBT, which is the last tunnel segment of the Anacostia River Tunnel. This is actually a
giant 23-foot-diameter sewage tunnel that can store 90-million gallons of combined sewage during
heavy rains to keep from overflowing the sewer system in the District. The combined sewage will ultimately make its way to the Blue Plains Advanced Wastewater Treatment Plant where it will be treated,
cleaned and recycled back to the Potomac River.
When Chris finishes mining and all work is complete in 2023, the Northeast Boundary Tunnel will
connect to the existing First Street Tunnel. The first half of the tunnel opened in March 2018 and has
already substantially improved the health of the Anacostia River.
"To date, the portion of the Anacostia River Tunnel that is in service has prevented more than 7
billion gallons of combined sewage and 3,500 tons of trash from entering the Anacostia, bringing a
resurgence to the waterfront. The Northeast Boundary Tunnel in particular will significantly reduce
sewer backups and chronic flooding in the Bloomingdale and LeDroit Park and other neighborhoods
adjacent to Rhode Island Ave, NE," said David L. Gadis, CEO and General Manager of DC Water. When
the entire 13.1-mile Anacostia River Tunnel is completed, it will reduce combined sewer overflows to
that river by 98 percent.
The boring machine has been mining since September of 2018 and the tools on its cutterhead are
worn from all the work.
Lee_UndrgroundConstruction2020_Ad.qxp_Layout 1 3/20/20 10:18 AM Page 1

CGA: Late Locates of Buried
Utilities Appear Underreported
Common Ground Alliance (CGA) has announced
the findings from a new supplemental report
examining near-miss data submitted to the Damage
Information Reporting Tool (DIRT) from 2015-2018.
The report, which analyzes near-miss data separately from actual damage incident data, examines
the characteristics that make near misses unique
from damage events. Near misses to buried utilities
are defined as events where a damage did not occur, but a clear potential for damage was identified.
This first-of-its-kind examination of the nearmiss data set revealed several key takeaways and
suggestions for new analysis. Primary among
these findings was that the quality of near miss
data submitted by excavators is higher than that of
their damage reports, as these stakeholders appear
to utilize DIRT to document locating issues and
associated downtime. Near-miss data is analyzed
separately from damage data.
Other key findings from the near-miss sup-

YOUR
Drawings
TO
Fabrications

M

MOVES...
Because we share
your vision.

8

JUNE 2020 | UConOnline.com

Be

AC


http://www.UConOnline.com

Underground Construction - June 2020

Table of Contents for the Digital Edition of Underground Construction - June 2020

Contents
Underground Construction - June 2020 - FC
Underground Construction - June 2020 - IFC
Underground Construction - June 2020 - Contents
Underground Construction - June 2020 - 4
Underground Construction - June 2020 - 5
Underground Construction - June 2020 - 6
Underground Construction - June 2020 - 7
Underground Construction - June 2020 - 8
Underground Construction - June 2020 - 9
Underground Construction - June 2020 - 10
Underground Construction - June 2020 - 11
Underground Construction - June 2020 - 12
Underground Construction - June 2020 - 13
Underground Construction - June 2020 - 14
Underground Construction - June 2020 - 15
Underground Construction - June 2020 - 16
Underground Construction - June 2020 - 17
Underground Construction - June 2020 - 18
Underground Construction - June 2020 - 19
Underground Construction - June 2020 - 20
Underground Construction - June 2020 - 21
Underground Construction - June 2020 - 22
Underground Construction - June 2020 - 23
Underground Construction - June 2020 - 24
Underground Construction - June 2020 - 25
Underground Construction - June 2020 - 26
Underground Construction - June 2020 - 27
Underground Construction - June 2020 - 28
Underground Construction - June 2020 - 29
Underground Construction - June 2020 - 30
Underground Construction - June 2020 - 31
Underground Construction - June 2020 - 32
Underground Construction - June 2020 - 33
Underground Construction - June 2020 - 34
Underground Construction - June 2020 - 35
Underground Construction - June 2020 - 36
Underground Construction - June 2020 - 37
Underground Construction - June 2020 - 38
Underground Construction - June 2020 - 39
Underground Construction - June 2020 - 40
Underground Construction - June 2020 - 41
Underground Construction - June 2020 - 42
Underground Construction - June 2020 - 43
Underground Construction - June 2020 - 44
Underground Construction - June 2020 - 45
Underground Construction - June 2020 - 46
Underground Construction - June 2020 - 47
Underground Construction - June 2020 - 48
Underground Construction - June 2020 - 49
Underground Construction - June 2020 - 50
Underground Construction - June 2020 - 51
Underground Construction - June 2020 - 52
Underground Construction - June 2020 - 53
Underground Construction - June 2020 - 54
Underground Construction - June 2020 - 55
Underground Construction - June 2020 - 56
Underground Construction - June 2020 - 57
Underground Construction - June 2020 - 58
Underground Construction - June 2020 - IBC
Underground Construction - June 2020 - BC
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202205
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202204
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202203
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202202
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202201
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202112
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202111
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202110
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202109
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202108
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202107
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202106
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202105
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202104
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202103
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202102
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202101
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202012
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202011
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202010
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202009
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202008
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202007
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202006
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202005
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202004
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202003
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202002
https://www.nxtbook.com/nxtbooks/gulfpub/uc_202001
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201912
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201911
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201910
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201909
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201908
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201907
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201906
https://www.nxtbook.com/nxtbooks/gulfpub/uesi_summer2019
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201905
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201904
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201903
https://www.nxtbook.com/nxtbooks/gulfpub/uesi_winter2019
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201902
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201901
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201812
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201811
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201810
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201809
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201808
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201807
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201806
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201805
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201804
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201803
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201802
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201801
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201712
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201711
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201710
https://www.nxtbook.com/nxtbooks/gulfpub/uc_ditchwitch
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201709
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201708
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201707
https://www.nxtbook.com/nxtbooks/gulfpub/uc_201706
https://www.nxtbookmedia.com