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Today’s
genda
• Expert Review Panel
• Settlement update, ongoing
monitoring• SR 99 Tunnel Project
update
2
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EXPERT REVIEW
Panel
3
2015 report key findings
• Confident that the project can be successfully
completed
• The design-build contract is the right tool to get
the job done
• The seawall and tunnel project schedules are not
adversely effected by the respective projects
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Expanded
4
Jack Main
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f requency5
Instrument Type General Location Monitoring Frequency
Utility SettlementPoint
Near and south of access pit,including Western Avenue
Daily or weekly, depending onlocation
Satellite (ATLAS) Downtown corridor Biweekly
MPBX Along tunnel alignment Every four hours along full route
Daily within TBM zone of
influence
Inclinometer Access shaft vicinity Weekly
Seismographs Alaskan Way – Jackson to
Main, Tunnel portals
Once per minute, reported
weekly
Liquid Levels Western, Polson and
Commuter buildings
Every four hours
Limited Manual
Building Survey
Pioneer Square buildings near
Viaduct (select locations)
Daily, weekly or monthly,
depending on location
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f requency6
Instrument Type General Location Monitoring Frequency
Manual Viaduct
Survey
Full length of Viaduct Weekly or monthly, depending
on location
AMTS Pioneer Square buildings near
Viaduct, Viaduct (select
locations)
Half-hourly or hourly, depending
on location
Tiltmeters Western, Polson and
Commuter buildings, Viaduct
(select locations)
Every four hours
Crack Gauges Viaduct (select locations) Every four hours to every three
weeks, depending on location
Piezometers Access shaft, tunnel
alignment
Every two minutes to every four
hours, depending on location
Secondary Survey
Control
SoDo, Pioneer Square,
Downtown
Weekly or monthly, depending
on location
LiDAR Pioneer Square Monthly
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Settlement
7
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Settlement
8
• All readings shown are based on WSDOT survey data.
• The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
Columbia Street and Second Avenue
(Primary Surface Survey Control Point –
X35)
-0.16 -0.16 -0.16 -0.16
-1.5
-1.25
-1
-0.75
-0.5
-0.25
0
0.25
S e t t l e m e n t ( i n . )
Survey Accuracy
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Columbia Street and Second Avenue
(Secondary Surface Survey Control Point –
SMP405)
Settlement
9
• All readings shown are based on STP survey data.
• The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
-0.34
-0.41
-0.32
-0.32
-0.34
-0.31
-0.30
-0.34
-0.31
-0.35
-0.32
-0.32
-0.31
-0.19
-0.25 -0.23 -0.32
-0.29-0.29
-0.32
-1.500
-1.250
-1.000
-0.750
-0.500
-0.250
0.000
0.250
S e t t l e m e n t ( i n . )
Survey Accuracy
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Settlement
10
• All readings shown are based on WSDOT survey data.
• The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
James Street and Fifth Avenue
(Primary Surface Survey Control Point –
AWV011)
S e t t l e m e n t ( i n . )
-0.16 -0.16
-1.5
-1.25
-1
-0.75
-0.5
-0.25
0
0.25
Survey Accuracy
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Settlement
11
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South Main Street and First Avenue South
(Primary Surface Survey Control Point –
X05)
Settlement
12
• All readings shown are based on WSDOT survey data.
• The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
S e t t l e m e n t ( i n . )
-0.71
-0.71
-0.67
-0.75
-0.71
-0.71
-0.75-0.83
-0.94
-0.94 -0.94 -0.94 -0.98 -0.94 -0.94 -0.94 -0.98 -0.98 -0.94 -0.98 -0.98 -0.98
-1.500
-1.250
-1.000
-0.750
-0.500
-0.250
0.000
0.250
Survey Accuracy
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South Main Street and First Avenue South
(Secondary Surface Survey Control Point –
MAIN)
Settlement
13
• All readings shown are based on STP survey data.
• The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
-1.04
-1.08
-1.15 -1.12
-1.15
-1.03
-1.06
-1.06
-1.10
-1.10
-1.14
-1.09
-1.10
-1.09 -1.10
-0.95
-1.00
-0.98
-1.01 -0.98
-1.00
-1.00
-1.00
-0.98-1.00
-1.00
-0.97
-0.97
-1.21
-1.16-1.26
-1.50
-1.25
-1.00
-0.75
-0.50
-0.25
0.00
0.25
S e t t l e m e n t ( i n . )
Survey Accuracy
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South Jackson Street and First Avenue South
(Primary Surface Survey Control Point –
Y04)
Settlement
14
• All readings shown are based on WSDOT survey data.
• The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
S e
t t l e m e n t ( i n . )
-0.87
-0.87
-0.87
-0.87
-0.87
-0.87
-0.91-0.98
-1.10
-1.10
-1.10 -1.10 -1.10 -1.10 -1.10 -1.10 -1.14 -1.10 -1.10 -1.10 -1.14 -1.10
-1.500
-1.250
-1.000
-0.750
-0.500
-0.250
0.000
0.250
Survey Accuracy
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South Jackson Street and First Avenue South
(Secondary surface survey control point –
JACK)
Settlement
15
• All readings shown are based on STP survey data.
• The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
-1.16
-1.16
-1.18
-1.24
-1.18
-1.15
-1.14
-1.16
-1.22
-1.18
-1.24
-1.18
-1.21
-1.22 -1.22
-1.08
-1.14
-1.16
-1.15
-1.14
-1.14
-1.16
-1.13
-1.16-1.07
-1.37
-1.28-1.39
-1.50
-1.25
-1.00
-0.75
-0.50
-0.25
0.00
0.25
S e
t t l e m e n t ( i n . )
Survey Accuracy
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South Jackson Street and Second Avenue Extension South
(Primary Surface Survey Control Point –
GP232)
Settlement
16
• All readings shown are based on WSDOT survey data.
• The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
S e t t l e m e n t ( i n . ) -0.43
-0.43
-0.63 -0.63 -0.63
-1.5
-1.25
-1
-0.75
-0.5
-0.25
0
0.25
Survey Accuracy
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South King Street and Second Avenue South
(Primary Surface Survey Control Point –
X39)
Settlement
17
• All readings shown are based on WSDOT survey data.
•
The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
S e t t l e
m e n t ( i n . )
Survey Accuracy
-1.26 -1.26
-1.5
-1.25
-1
-0.75
-0.5
-0.25
0
0.25
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Settlement
18
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First Avenue South between Railroad Way South
and South Royal Brougham Way(Primary Surface Survey Control Point – Y09)
Settlement
19
• All readings shown are based on WSDOT survey data.
• The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.
• Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.
-0.71-0.75 -0.75
-1.5
-1.25
-1
-0.75
-0.5
-0.25
0
0.25
S e t t l e m
e n t ( i n . ) Survey Accuracy
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Viaduct
20
Crews assessing viaduct during semiannual inspection.
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Western Avenue
21
= water line
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Pioneer Square bui ld ing
•
Completed 60 buildingassessments. No structural
damage.
• Coordinating with property
owners on property condition
surveys.
22
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Repairing
Preparing the access pit wall
Feb. 17, 2015
23
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Bertha’s breakthrough
Feb. 19, 2015
24
BERTHAreaches dayl ight
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Repair ing
Tidying up the access pit
Feb. 24, 2015
25
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Repair ing
26
Bertha in the access pitMarch 4, 2015
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UPDATE
PHOTO
Repair ing
27
Crews prepare Bertha’s outer
shield for removal
March 17, 2015
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Repair ing
28
Bertha’s top shield isremoved
March 19, 2015
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Repair ing
29
Bertha’s first side shield isremoved
March 21, 2015
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Repair ing
31
Crews prepare the cutterheadand drive unit for the big lift
March 27, 2015
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Repair ing
The cutterhead and
drive unit emerge
from the pitMarch 30, 2015
32
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Repair ing
The cutterhead and
drive unit are placed on
the repair platformMarch 31, 2015
33
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Repair ing
34
The drive unit is removed
from the cutterhead
April 3, 2015
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Repair ing
35
The drive unit is removed
from the cutterhead
April 3, 2015
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Repair ing
36
The cutter drive unit on itsrepair platform
April 6, 2015
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How toRE CH US
Website:
www.AlaskanWayViaduct.org
Twitter:@BerthaDigsSR99
Email:
Hotline:
1-888-AWV-LINE
Our information center,
Milepost 31, is located
at 211 First Ave. S. in
Seattle’s Pioneer
Square neighborhood