Project Information
Overview
The
State Route 4 Bypass project (Bypass) is a roadway project being developed
by a cooperative effort between Contra Costa County and the Cities of
Antioch, Brentwood and Oakley. The purpose of the Bypass is to ease
traffic congestion in Brentwood and Oakley and to provide access to the
growing areas of southeast Antioch and western Brentwood. The Bypass
will replace existing State Route 4 from just south of the Main Street
Interchange to the existing intersection with Marsh Creek Road. It
is expected that Caltrans will relinquish the existing highway and accept
the Bypass as the new State Route 4 sometime between 2008 and 2010.
The primary source of funds for the program is from fees collected on all
new development in eastern Contra Costa County.
Frequently
Asked Questions - FAQ
What
is Being Proposed? The
State Route 4 Bypass (Bypass) – Phase 1 project is a large, regional
transportation project being constructed in three segments.
Segment 1 extends from just east of the SR4/Hillcrest Avenue
Interchange to
Lone Tree Way
in the City of
Antioch
and will consist of a 6-lane freeway between existing SR4 and the
Laurel Road Interchange and a 4-lane freeway from here to
Lone Tree Way
. Phase 1 of Segment 2 has
been constructed as a 2-lane Expressway from
Lone Tree Way
to
Balfour Road
with plans to convert it to a full freeway with interchanges at
Sand Creek Road
and
Balfour Road
. Segment 3 extends from Balfour Road south to Marsh Creek Road as
a 2-lane Expressway, then along Marsh Creek Road (East-West
Connector) as a 2-lane conventional highway, connecting to existing
SR4 (Byron Highway). The southerly limits of the project (now
called the Vasco Road Extension) are from
Marsh Creek Road
to
Vasco Road
at
Walnut Boulevard
.
Right
of way is also being acquired and/or preserved for the ultimate
transportation corridor to accommodate an 8-lane divided freeway with
transit in the median as well as land necessary for the future
interchanges at
Sand Creek Road
,
Balfour Road
,
Marsh Creek Road
and
Walnut/Vasco Road
.
What
are the Project Limits? The
Bypass project starts approximately half way between the Hillcrest
Avenue/SR4 Interchange in the City of
Antioch
and the Main Street/SR4 Interchange in the City of
Oakley
and continues south to
Marsh Creek Road
(approximately 8.5 miles) in the City of
Brentwood
in eastern
Contra
Costa
County
. The Bypass continues on
Marsh Creek Road
(upgraded roadway) to its intersection with existing SR4 (
Byron Highway
), approximately 12.4 miles in total length.
Why do we need
the Project? The
Bypass will accomplish the following:
1)
Provide
access to the growing areas of southeast
Antioch
and western
Brentwood
;
2)
Ease
traffic congestion in
Antioch
,
Brentwood
, and Oakley; and
3)
Provide
improved local circulation/mobility for
Antioch
, Oakley and
Brentwood
residents.
The
Bypass project, when complete, will become the new State Route 4 through
the Cities of Antioch and Brentwood and
Contra
Costa
County
. It is anticipated that
Caltrans will adopt the Bypass as the new State Route 4 and relinquish
the existing highway in the 2008/2009 time frame
What is the history of the project?
The Bypass was born out of the East County Corridor
Study of the late 1980’s prepared by Caltrans, Contra Costa and
Alameda
Counties
, the City of
Antioch
, Brentwood and
Livermore
and the Contra Costa Water District. The study
identified feasible alternatives
for a transportation corridor between State Route 4 in eastern Contra
Costa to Interstate 580 in
Alameda
County
. A preferred alternative was
adopted in the study and the northern part of this alternative became the
initial alignment of the Delta Expressway, later known as the State Route
4 Bypass. The Bypass is now
being developed and constructed by a cooperative effort between Caltrans,
Contra
Costa
County
and the cities of
Antioch
,
Brentwood
and Oakley.
Who is building
the project? In 1989, the State Route 4
Bypass Authority was created through a Joint Powers Agency Agreement to
deliver the SR4 Bypass Project. This
agency, which includes
Contra
Costa
County
and the Cities of
Antioch
,
Brentwood
and Oakley, has been working with Caltrans since the mid-1990’s to
implement the project.
How will the
project be paid for? The
principal source of revenue for the Bypass program is from a regional
transportation-funding agency, the East Contra Costa Regional Fee and
Financing Authority (ECCRFFA). This fee is currently collected on new development in
eastern
Contra
Costa
County
.
Have any portions of the project been completed yet? Phase
1 of Segment 1 was started in 2004 with Construction Package 1 with an
estimated construction cost of $8.5 million that mainly consists
of
the
construction of a new separation bridge on existing SR4 east of
Hillcrest Avenue
in
Antioch
and advance work to facilitate the Construction Package 2.
Construction Package 1 was completed in late summer 2006.
Phase 1 of Segment 2, between
Lone Tree Way
and
Balfour Road
, was completed and opened to traffic in the spring of 2002.
Phase 1 of Segment 2 consisted of two lanes of roadway (the future
two northbound lanes of a 4-lane divided roadway) with signalized
intersections at
Lone Tree Way
,
Sand Creek Road
and
Balfour Road
. This phase of the project cost an estimated $30 million.
Most of the ultimate right of way (approximately 380 acres) for the
entire 12-mile corridor has also been acquired or will be acquired by the
end of 2006. Significant
utility relocation work in all segments has occurred as well.
What
is the Current Schedule and Status of the Project?
Construction
Package 2 of Segment 1, Phase 1 was awarded to De Silva Gates/FCI
Constructors and construction started in the summer of 2005.
This part of the project consists of constructing
the Bypass from SR4 to the existing section of Bypass (Segment 2) at
Lone Tree Way
in
Antioch
(6-lane freeway to
Laurel Road
and then 4-lanes of roadway to
Lone Tree Way
with interchanges at
Laurel Road
and
Lone Tree Way
) and is estimated to cost $106 million.
As
for Segment 3, the right of way has been acquired and the project was
recently awarded to De Silva Gates Construction in October 2006.
Construction of this segment has started and consists of a two-lane
Expressway from
Balfour Road
to
Vasco Road
. In addition,
Marsh Creek Road
will be improved to Caltrans standards for a conventional highway and will
provide the connection back to existing State Route 4. The estimated cost
for Segment 3 is approximately $71 million.
What
is the Cost of the Project?
The total estimated cost of Phase 1 of the SR4 Bypass
Project
is approximately $207 million. The
first phase of Segment 1 is estimated to cost approximately $106 million
when complete, the first phase of Segment 2 was around $30 million and the
first phase of Segment 3 is estimated to cost $71 million. These costs
include environmental, engineering, right of way acquisition, utility
relocations and construction and construction management.
Project
Map - Segment 1
Project
Map - Segment 2
Project
Map - Segment 3
Aerial
Map - Segment 1, 2 & 3
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