Project Overview:
HBG Flatiron
is partnered with the M. DeMatteo Construction Company in
a joint venture constructing the $185 million interchange
on Interstate 90. This new interchange will connect the Ted
Williams Tunnel to the Logan International Airport roadways
and is nearly complete.
Project Features:
1,300 linear feet of permanent I-90 connection varying from
two to eight lanes
8,000 linear feet of viaduct consisting of cast-in-place,
post-tensioned box girders with single, double and triple-cell
design with post-tensioned, cantilevered decks
6,000 feet of reinforced concrete, open-depressed roadway
(boat section) and tunnels constructed using the cut-and-cover
method (boat and tunnel walls are typically over 2 feet thick
and range from 2 to 25 feet high)
I-90 base foundation was integral with the tunnel roof and
was constructed askew to the tunnel alignment. The tunnel
roof also supported approximately 500 feet of viaduct above,
creating in effect a three-level roadway system all at differing
skews to each other
9,000 feet of at-grade approach roadways that include both
temporary and permanent local roads (to maintain traffic into
and out of Logan Airport during construction, 30 detour roads
were created, ranging from 200 to 2,000 feet-long)
Project Related Links:
Massachusetts Turnpike Authority
http://www.massturnpike.com
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