Evening star., 1952-08-31
E STREET BRIDGE


Of the PROPOSED E Street Bridge
indicate the need Of q six-lane
bridge. The design contemplates
two 38-foot roadways, separated
|by a 4 foot median strip. and two
6-foot sidewalks. A continuous
deck girder structure has been
chosen as the most economical
for this location.
To accommodate navigation. a
125-foot clear horizontal span over
the channel with a 63-foot vertical
clearance above mean low water
has been used. These clearances
have been discussed informally
with the Corps Of Engineers.
United States Army, and in the
absence Of formal War Depart
ment hearings and approval, are
believed to satisfy the require
ments Of navigation.
The clearances shown allow the
use Of q fixed span over the navi-
cation channel. thereby eliminat-
ing the high maintenance and
operating costs inherent in a NOV
able span. Where the bridge passes
over Theodore Roosevelt Island,
the roadway elevation clears the
top Of the island by approximately
40 feet.
On the District side the pro-
posed construction extends into
e street and connections are made
to New Hampshire avenue. Rock
Greek and Potomac parkway and
26th street. It is contemplated
that Rock Greek and Potomac
parkway will be changed to carry
southbound one-way traffic and
that 26th street will be q north
bound one-way street at this point.
The Virginia approach extends to
Ia connection with Arlington houle-
ward with interchange connections
lat George Washington Memorial
parkway and proposed extension
of the Jefferson Davis highway to
Wilson boulevard at North Moore
and North Lynn streets.
Information obtained from a
study of the foundations of Key
and Memorial Bridges, borings on
Theodore Roosevelt Island, river
soundings made by the United
States Engineers, and by site in
Spection indicates that the piers
may be founded on rock not far
below the natural surface of the
ground, which has been assumed
in the design of piers and de-
termination of economical span
lengths.
The estimates contemplate that
all piers and masonry will have
stone facing, in order to provide
a structure suitable architecturally
to this prominent location.
Construction Cost.
In order to utilize the capacity
Of the bridge to its fullest extent,
improvement and widening of
streets leading to the bridge on
the District side will be necessary.
This work, however. will be under
taken by the District and is not
a part of this report. The esti-
mates of cost given hereinafter
include the District approach to
the intersection of z street with
oath street, together with the con-
nections to New Hampshire
avenue, Rock Greek and Potomac
parkway and 26th street; the main
bridge; and the Virginia approach
to the connection with Arlington
boulevard, including the connec-
tions to George Washington
Memorial parkway. the extension
of Jefferson Davis highway and
connections thereto. ramp con-
nections to Wilson boulevard, and
the relocation Of Fort Myer drive.
Fifteen percent has been added
for engineering, administration
and contingencies.
Cost Of Right-of- Way.
On the District side the right
of-way involves acquisition of a
considerable amount of high
valued land and q number Of
buildings. A careful study has
been made Of the area and every
effort was made to keep property
damage to q minimum while pro-
lviding adequate connections to the
bridge. Right-of-way for the
Virginia approach also involves
acquisition Of high-yalued land
and some industrial property. !
The estimated cost Of right
lof-way on the District side Is
81 ,805, 900. and on the Virginia
side $3,931 900, making Q total Of
IS, ,736, 900. These estimates in
lclude 10 per cent contingencies to