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SR 99 tunnel construction is starting north of downtown.
Are you ready?
SR 99 Tunnel Project
Crews working for the Washington State Department of Transportation have started construction for the SR 99 tunnel - the replacement for the Alaskan Way Viaduct. The tunnel route starts near the stadiums and ends near Aurora Avenue North and Harrison Street.
The shaded section shows the future location of the SR 99 tunnel’s north entrance. Tunnel construction in this area will soon join Mercer Street, Gates Foundation and other projects already underway in the neighborhood. Excavation will begin at this site in summer 2012. Tunnel boring begins beneath downtown in mid-2013, with the tunnel scheduled to open in late 2015.
SR 99/Aurora Avenue N.
Harr
ison
Stre
et
Mercer Street
N
Broad Street
SR 99 tunnel north portal site
Gates Foundation construction
99
99
99
Har
riso
n St
reet
Aurora
Avenue
Mer
cer S
tree
t
Mer
cer S
tree
t
New
Six
th A
venu
e N
.
Sou
thbo
und
SR
99
on-r
amp
from
new
Six
th A
venu
e N
.
Sou
thbo
und
SR
99
off-r
amp
to A
uror
a Av
enue
New
two-
way
M
erce
r Stre
et
Nor
thbo
und
SR
99
off-r
amp
to R
epub
lican
Stre
et
Nor
thbo
und
SR
99
on-r
amp
from
Aur
ora
Aven
ue
NFollo
w u
s on
the
web
ww
w.a
lask
anw
ayvi
aduc
t.org
Visi
t our
web
site
to le
arn
mor
e ab
out t
he S
R 9
9 tu
nnel
pro
ject
, cur
rent
co
nstru
ctio
n ac
tiviti
es a
nd tr
affic
impa
cts.
Che
ck o
ut o
ur in
tera
ctiv
e si
mul
atio
n to
see
how
con
stru
ctio
n w
ill u
nfol
d ar
ound
you
thro
ugh
2017
.
Her
e is
a d
esig
n co
ncep
t of t
he S
R 9
9 tu
nnel
’s
north
por
tal a
nd th
e ac
cess
it w
ill p
rovi
de.
Add
ition
al d
etai
ls a
re a
vaila
ble
on o
ur w
ebsi
te.
Con
tact
us
with
que
stio
ns
1-88
8-AW
V-LI
NE
(298
-546
3)vi
aduc
t@w
sdot
.wa.
gov
For g
ener
al q
uest
ions
, cal
l wee
kday
s be
twee
n8
a.m
. and
5 p
.m. t
o sp
eak
with
pro
gram
sta
ff.
You
can
call
us a
nytim
e -
24 h
ours
a d
ay, 7
day
s a
wee
k - w
ith
conc
erns
abo
ut c
onst
ruct
ion
nois
e.
Keep
up
with
SR
99 tu
nnel
cons
truct
ion
in yo
ur n
eighb
orho
od