HomeMy WebLinkAboutMINUTES - 03042003 - SD3 TO: BOARD OF SUPERVISORS
Contra
FROM: DENNIS M. BARRY, AICP Costa
COMMUNITY DEVELOPMENT DIRECTOR -54County3
DATE: MARCH 4, 2003
SUBJECT: AUTHORIZATION OF GENERAL PLAN AMENDMENT AND PRECISE
ALIGNMENT STUDIES FOR THE BYRON AIRPORT ACCESS ROAD
(GP 03-0002) (DISTRICT 111)
SPECIFIC REQUEST (S) OR RECOMMENDATION (S) iii BACKGROUND AND JUSTIFICATION
RECOMMENDATION
I. AUTHORIZE the Community Development Department and Public Works Department to
initiate the General Plan Amendment and Precise Alignment studies and necessary
environmental review, which would define the alignment for a new roadway between
Vasco Road and Byron Highway,to provide improved access for the Byron Airport and to
include this new roadway in the Transportation-Circulation Element of the County General'
Plan, contingent upon funding provided by the East County Transportation Improvement
Authority.
CONTINUED ON ATTACHMENT. X YES SIGNATURE -
REOMMEMATION OF COUNTY ADMINISTRATOR RECOMMENDATION OF BOARD`%
COMMITTEE
APPROVE OTHER
SIGNATURE S
7CT'1ON OF BOARD ON Mrch 7 APPROVED A5 RECOMMENDED X OTHER—
VOTE
THER—VOTE OF SUPERVISORS
X UNANIMOUS I HEREBY CERTIFY THAT THIS IS A TRUE AND
{ABSENT�._) CORRECT COPY OF AN ACTION TAKEN AND
AYES: NOES: ENTERED ON THE MINUTES OF THE BOARD OF
ABSENT: ABSTAIN: SUPERVISORS ON THE DATE SHOWN
DISTRICT III SEAT VACANT
Contact: P.Roche,CDD-AP(925)335-4242 ATTESTED March 4, 2003
cc:CDD JOHN SWEETEN, CILERK Of THE BOARD OF
Public Warks Dept. SUPERVISORS AND COUNTY ADMINISTRATOR
CAO . i
County Counsel ;
BY ' A ,DEPUTY
Board of Supervisors 0310412003
County File#GP03-0002
Page 2
RECOMMENDATION - continued
2. AUTHORIZE the Community Development Director to enter into a funding agreement
between the County and the East County Transportation Improvement Authority to
underwrite the County's costs to undertake the above referenced studies.
3. REQUEST the County Planning Commission to conduct a public hearing to considerthe
inclusion of this new roadway within the Transportation-Circulation Element of the County
General Plan, upon completion of above referenced studies, and forward its
recommendation to the Board of Supervisors.
4. REQUEST the East County Regional Planning Commission to review the proposed
alignment for the Byron Airport Access Road based on the General Plan Amendment
and Precise Alignment studies, and, as necessary, forward comments to the County
Planning Commission.
FISCAL IMPACT
The State Route 4 Bypass Authority and East County Transportation Improvement Authority
have budgeted the funding for the necessary studies of the proposed roadway, which include
preparation of the General Plan Amendment and Precise Alignment studies and the
environmental review. As noted in the recommendation, a funding agreement between the
County and the East County Transportation Improvement Authority would need to be executed
to secure funding for this project.
BACKGROUND/JUSTIFICATION
The Community Development and Public Works departments have been coordinating over the
last year on how to resolve circulation and access issues for the Byron Airport. As a result of
that effort a document entitled"Byron Airport Circulation Report", dated July 15,2002,was jointly``
developed by the two departments to analyze alternative roadway alignments that could serve
the airport in the future (a copy of this report is attached as Exhibit"A")
The"Byron Airport Circulation Report"was provided as information to the State Route 4 Bypass
Authority, because, in addition to identifying a new roadway that could',potentially improve'
access to the Byron Airport, the report identified the new roadway's potential to also function as
east-west connector for the southern terminus of the State Route 4 Bypass. The east-west
connector was originally identified as part of the State Route 4 Bypass as an alternative route
near the southern terminus of the bypass roadway. It was conceived as an alternative route for
through traffic with regional destinations instead of relying on Marsh Creek Road as a connection
to the State Route 4 Bypass.The Public Works Department conducted a conceptual engineering
study in the early 1990's that investigated possible route alignments for the east-west connector'
at the southern terminus of the State Route 4 Bypass. That earlier study identified the potential
for a roadway aligned just north of the Byron Airport. Interest in this route was revived when the
"Byron Airport Circulation Report"re-evaluated this conceptual route alignment and identified it
as the preferred route for a roadway accessing the Byron Airport. Following review of the report
Board of Supervisors 03104/2003
County File#GP03-0002
Page 3
by the Mate Route 4 Bypass Authority, the Chair of the Bypass Authority sent a letter, dated
October 30, 2002, to the Board of Supervisors requesting that the roadway be included in the
County General Plan's Transportation-Circulation Element. The Board of Supervisors received'
this request on December 17, 2002, and referred the request to the Community Development
and Public Works.
The two departments have reviewed the request from the State Route 4 Bypass Authority and
recommend the following actions as described above in the Recommendation section to this
Board Order.
As a point of reference, the Board of Supervisors in November 1995 adopted the Byron Airport
Action Plan, which outlined the process for reviewing General Plan policies around the Byron
Airport. That action pian included direction to undertake a comprehensive General Plan review'
around the Byron Airport,after the completion of the Airport Land Use Compatibility Plan,which'
was to be prepared by Contra Costa County Airport Land Use Commission (ALUC). On August'
13, 2002, the Board of Supervisors finally received the long awaited ALUC Airport Land Use
Compatibility Plan and directed the County Planning Commission review;the ALUC plan and
recommend actions to bring the County's General Plan and related ordinances into compliance
with ALUC pian as required by law. Since the direction to do a comprehensive review was given
in 1995,the Board has authorized the Public Works Department to initiate a Master Plan Study''
for the Byron Airport. That effort has just begun and it will take approximately twelve (12)'
months to complete. Both Community Development and Public Works Department staffs
support initiating this effort which combines the General Plan Amendment Study and Precise
Alignment Study for the proposed Byron Airport Access Road,as requested by the State Route 4``
Bypass Authority. Both departments believe it is necessary to undertake the effort at this time to
more precisely define the alignment for a new roadway and include it within the General Plan. It
will provide the on-going Byron Airport Master Plan process with the context for regional access'
to and local circulation around the airport, particularly if its operations are expanded, and when
completed,these recommended studies would enable the County to take the necessary steps to
reserve and protect the right-of-way for a new roadway.
The Community Development Department believes that any comprehensiveGeneral Plan review
around the Byron Airport, as defined in the 1995 Byron Airport Action'Plan, should await'
completion of both the Byron Airport Master Plan Study(now in progress)and the inclusion of
the new Byron Airport Access Road in the General Plan's Transportation-Circulation Element.
Attachments
Exhibit"A": "Byron Airport Circulation Report",dated July 15,2002
Exhibit"B Draft Letter from CDD Director to Chair, East County Transportation
Improvement Authority
G:tAdvancePlanningtadv-pian\Board Girders\ByronAirportRoadgparequest.doc
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Exhibit "A": "'Byron Airport Circulation Report", dated
July 15, 2002
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BYRON AIRPORT CIRCULATION REPORT
July 15, 2002
I. PURPOSE OF THIS REPORT
The purpose of this report is to provide background information for a General Plan
Amendment(GPA)process for the Byron Airport Circulation Project. The GPA process
will involve analysis of the proposed project and other alternatives, reaching agreement
on a preferred alternative, and obtaining all necessary environmental clearances for the
preferred alternative so it can be amended into the Transportation and Circulation
Element of the General Plan. This report is a joint document prepared and supported by
both the Public Works and Community Development Department staffs.
II. INTRODUCTION/BACKGROUND
In the mid 70's, Contra Costa County conducted an airport study and identified the need
for one or more new airports to relieve the aircraft parking and to ease the busy Buchanan
Field in Concord. Two different sites, one at Oakley and the other in Lone Tree Valley,
were proposed during the course of the studies. After much debate, both were dropped
because of community opposition. The sites were considered to be more suitable for
urban development. With these prospective sites eliminated, attention turned to the idea
of County acquisition and development of privately owned Byron Airpark located in the
southeastern area of the County. The fact that it was already an operating airport, and was
not in an urban expansion area,made it an attractive possibility.
With many years of planning and building new runways, new Byron Airport has been in
operation since 1994. A wide variety of flying activities including sky diving, sailplane
flights, and ultralight aircraft operations take place at Byron. Although future
urbanization of the east County will undoubtedly lead to greater business use of Byron
Airport, current planning envisions the airport's predominant role to remain as a location
for personal and recreational flying. The public can access the airport via some poor,
limited,and unimproved roads such as Armstrong Road, and Byron Hot Springs Road via
Byron Highway. There is no roadway connection east to Vasco Road that leads to
Alameda County. An east-west connector, which links Vasco Road to Byron Highway,
will definitely increase the circulation around the Byron airport areas. This new
connector will also encourage residents of eastern Alameda to use the airport.
Eastern Contra Costa County is experiencing significant residential growth due to the
availability of land, location, and the need for affordable housing. The Association of
Bay Area Governments (ABAG)forecasts that the number of households in Antioch and
Brentwood are projected to increase 39% and 134%respectively by the year 2020.
(Source. ABAG,Projections, 1998) Both commercial and residential development will
expand concurrently,making this area a growth center for the next twenty-five years.
The result of this growth will be ever increasing traffic demands on State Route 4(SR4),
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State Route 4 Bypass (SR4BP) and the local roadway network. The population growth
will increase the demand for commute traffic and:goods movements, while at the same
time, operational problems on SR4, and local roadways could create serious traffic
congestion.
In November 1994, Contra Costa County Public Works Department conducted a State
Route 4 Bypass East-West Connector Alternative Study which presents a preliminary
assessment of various alternatives for the East-'Nest Connector between the proposed
SR4Bypass and existing SR4. The proposed East-West Connector will provide an
alternate East-West route for the increasing truck traffic within this region. It also helps
shifting regional traffic away from local communities. Byron Highway carries a large
volume of trucks (about 20%of the total traffic volumes, Caltrans 93 Truck
Volumes/Percentages)between eastern Contra Costa County and the warehousing areas
of Tracy and provides access to routes leading to I-5 and the Central Valley. The Vasco
/Byron Connector will share the same functions similar to the Bypass East-West
Connector. When portion of the track traffic route through the Vasco/Byron Connector, it
will reduce the environmental impacts to the nearby communities such as improving air
quality, reducing traffic noise,prolonging the road pavement's life cycle, and reducing
local road traffic congestion.
State law provides for two new state highways in the area. State Route 239 would
connect Brentwood with Tracy via the Byron Highway Corridor. State Route 84 (also
known as the East County Corridor)would connect Brentwood and Livermore via the
Vasco Road Corridor. Both of these proposals are supported in the County General Plan.
However, there is no consensus among the affected counties on how to proceed with their
implementation, so they remain as long-range improvements. Inter-regional trips to and
from Eastern Contra Costa must utilize low capacity conventional highways(Route 4 to
I-680,BART and TriDelta bus lines,Route 4 to I-5,Route 160 to I-80, Byron Highway
to I-205 and I-580, Vasco Road to I-580) or travel significant distances to access the
State's primary arterials.
A potential near term project to improve circulation in the vicinity of Byron Airport is to
construct an east-west road to connect Byron Highway with Vasco Road. This connection
would allow regional traffic to utilize Vasco Road in lieu of Byron Highway northof the
airport, and bypass the community of Byron. It is also one of several primary goals to
improve and integrate the airport access roads into the inter-regional roadway network. In
order to obtain a better inter-regional roadway system in the East County,the
construction of a designated East-West connector between Vasco Road and Byron
Highway, and a local two lane connector will provide more balanced distributions of
current and future traffic over the entire roadway network in this area.
III. GOALS OF PROPOSED PROJECT
The proposed project goals are summarized as follows:
Provide changes to the Circulation Element of the General Plan.
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Provide access to the Byron Airport,which facilitates and enhances its operation as
an airport.
Improve and integrate the airport access road into the inter-regional Bray area roadway
network.
♦ Improve the regional traffic within Eastern Contra Costa County by connecting Vasco
Road to Byron Highway.
i .Promote airport usage by the nearby Counties.
♦ Avoid/minimize the impact to the biologically sensitive areas between south of
Camino Diablo and north of Armstrong Road.
IV. GENERAL CONSTRAINTS
A. ALTERNATIVE LOCATION
The SR4BP connects SR4/SR160 junctions south to Vasco Road at
Walnut Boulevard. The East County Corridor extends south along Vasco
Road towards Alameda County. Vasco Road alignment runs southwest
after it passes the Byron Airport. On the other hand,Bryon Highway reins
southeast parallel to the Union Pacific Railroad(UPRR). At Bruns Road,
the alignment diverges further southeast away from the Vasco alignment.
We cannot eliminate the possibility of finding an alternative East-West
Connector south of Byron Airport,but this alternative will be much more
expensive due to its project length and it has more impact on designated
habitat areas or corridor areas. Therefore,we would like to limit our
alignment search area between north of Byron Airport to south of Camino
Diablo.
B. RAILROAD GEOMETRY
The Union Pacific Railroad(UPRR)track runs parallel to Byron Highway
about 1.00 feet apart, and the track elevation is 3 feet or more higher than
the finished grade on Byron Highway. This geometric constraint,both
vertical and horizontal, constitutes a great difficulty to make an
economical and effective railroad crossing. At this present time,we
assume all new railroad crossings are at-grade intersections with the new
alternative alignments.
Any new railroad grade crossings and grade separations, and any
relocations of alternatives of existing crossings must be cleared with the
railroad company and approved by the Public Utilities Commission
(PUC). A more detailed study should be made to determine a more cost-
effective railroad crossing solution.
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C. TOPOGRAPHY
The East-Nest Connector runs from east of Vasco Road to west of Byron
Highway. The topographic features change from rolling hills on the west
to relatively flat farmland on the east. A uniform design speed is difficult
to maintain due to the abrupt changes in ground elevation. Elevation in
the planning area ranges from 25 feet to 200 feet above mean sea level.
The steep grade incline on the roadway will hinder the truck flow on the
corridor. According to Caltrans standards, a steep roadway grade exceeds
4% and the incline length more than 250 feet, a separate analysis based on
Chapter 3 of the 1994 Highway Capacity Manual, will determine if a truck
climbing lane is required or not.
D. LAND USE
According to the County General Flan, majority of the study area is
classified as Agricultural Lands except the airport boundaries. The
boundaries of the airport encompass some 1,307 acres, less than half of
these aviation facilities are reserved for future development. The southern
and western parts of the property are designed for wildlife and habitat
preservation. The Airport is designated as Public and semi-Public.
E. BIOLOGICAL
Biological Constraints Analysis performed by Lawrence P. Storrnberg in
December 1994 indicated that the entire area is within the range of the San
Joaquin kit fox. All grassland and oak savannah habitat and the irrigated
pastures in the area provide a breeding ground for the kit fox. The
presence of the kit fox and the characterization of all non-clopped and
non.-developed lands as occupied kit fox habitat, therefore,pose a potential
significant constraint to development in the planning area.
Based on the biological sensitive area map provided by the airport,we
mapped the High Constraints Area(Level (ane)on our preliminary design
file and make sure the alignment does not cross with these High constraints
areas. If it does,mitigation will be required to mitigate any conflicts.
High Constraints (Level One)is defined by Mr. Stormberg as the area
occupied by the kit fox habitat and are often characterized by the presence
of more than one sensitive biological resource.
The Department of Fish and Game acquired the open space north of
Armstrong Road by private venture selling rights, and designated this area
as a biological sensitive area.
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F. UTILITY
IRRIGATION CANAL:
The Byron-Bethany Irrigation District 45 Canal flows.northward through
the eastside of the Byron area along the 45-foot contour line. This concrete
lined trapezoidal channel carries water for farm irrigation,and it serves as
drinking water for residents as well. Each alternative crosses at least one
irrigation canal except the Bryon Airport Access Road alternative,which
intercepts two canals at the east end.Under-grounding of these irrigation
facilities should not constitute any serious constraint to the;project.
V. ALTERNATIVE ALIGNMENT SELECTION CRITERIA
The County staff has selected road alignments for the East-West Connector based on the
following criteria: avoid relocation of existing residents, avoid permanent land uses,
avoid agricultural core lands, avoid severance of land parcels,protect archeological sites,
protect habitats of endangered species,protect wetlands,ponds and riparian habitat,
coordinate with existing and proposed utilities, and minimize project costs. These criteria
generally have equal priority and the goal is to obtain a proper balance between all of the
various criteria,with the primary goal having an alignment that achieves the project
goals.
VI. PROJECT DATA
A. GEOMETRIC DESIGN CRITERIA
This two lane conventional highway will be designed using Caltrans
highway design standards since this is typical of county roads. The design
speed for the proposed East-West Connector is 65 mph. The minimum
curve radius for this design speed is 1,650 feet. The minimum tangent on
reversing curves is 400 feet. Design speed on some of the alternatives
may decrease to suit the steep grade condition.
B. TYPICAL SECTION
The proposed typical section(Technical appendix) for East-West
Connector consists of 2-3.6m(12 feet)traffic lanes, 2-2.4m.(8 feet)
shoulders, and 2-3.0m(10 feet) for buffer zone. A total of 18m(60 feet)is
required for the interim constructions, and the County anticipates the need
to preserve 33.5m(110 feet)ultimate right-of-way for a future four-lane
roadway.
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C. STRUCTURAL SECTION
For cost estimate purposes,we assume a truck route structural section as
fellows:
180 mm Type A Asphalt Concrete
300 mm Type B Aggregate Base
454 mm Type C Aggregate Subbase
D. ENGINEERING ANALYSIS
The County Public Works staff utilized a County owned digital terrain
model surface and a Civil Engineering application program,to push a
roadway template along the proposed horizontal and vertical alignment
which creates a design project for each alternative. When the computer-
aided analysis is done,we would be able to determine the amount of right-
of-way required and the earthwork quantity involved in each alternative.
E. ULTIMATE SOUTHBOUND VASCO CONNECTION—Grade
separation
In order to make the ultimate southbound Vasco connection to Byron
Highway a through movement, a grade separated bridge structure is
required for both MIDWAY and Byron Airport Access Road alternatives.
The bridge length span over the existing Vasco Road is about 744 feet. A
separate study should investigate the possibility of building a two lane
structure for the ultimate configuration, and use the slow lane as a truck
climbing lane.
ER RD
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GENERAL PLAN'
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VII. PROPOSED ALTERNATIVES
A. CAIVIINO DIABLO
ROPOSED IMPROVEMENT51
Camino Diablo currently extends approximately 2.0 miles from the
proposed crossing with.the Vasco Road to Byron Highway. It is
anticipated that 0.5 miles of Camino Diable would rewire horizontal and
vertical realignment and road reconstruction in order to meet Stag
Highway standards. The remaining 2 miles of new pavement begins at
1,250m(4,000 feet)west ofByronlCamino Diablo intersection, and
extends south-east for about 3.05 Kni(1.89 miles). The alignment will
cross with UPRR tracks and conform to Byron Highway with an at grade
intersection.
GRICULTUR.AL AND ENVIRONMENTAL I PA
There is no Ag Care impact with this alternative. The new roadway
traverses through existing open space and agricultural lands. Since
Camino Diablo, and.Byron Highway are existing roads, the anticipated
impact on the environment is minimal. However,the area of horizontal
and vertical realignment and road reconstruction:has been identified as a
habitat of the San Joaquin kit fox.
OCIO—ECONOMIC
The Camino Diablo Alternative would impact approximately 40-50 homes
and there may be an associated economic impact to the community of
Byron. This alternative would direct regional traffic through the center of
Byron. There may be more significant impacts in Byron due to the
intersection of this alternative,Byron Highway, and two UPRR crossings.
Parcel severance is also significant, as the proposed roadway would split
several ranches. The new roadway cuts off a flirt road access to one
property;therefore, an alternative access path must be installed to mitigate
this problem.
OS
The cost estimate does not include costs for upgrading the existing section
of Camino Diablo. The cast estimate to construct the new roadway on
Camino Diablo alternative is $6.45 Million with an itemized cost estimate
included in the Technical.Appendix. This alternative may require two at
grade crossings of the UPRR right-of-way immediately adjacent to Byron
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Highway. If the Union Pacific Railroad object to the idea of an at grade
intersection with their facility,there a grade separation would be required.
B. MIDWAY
R.OPOSED IMPROVEMEI T
This alternative locates at the midway between Camino Diablo and
Armstrong Road. It T's-off from Vasco Road at about 4,000 feet north of
Armstrong Road and extend east along the perimeter of the High
Constraints Area for about 8,500 feet(1.6 miles)until it crosses with
UPRR and conforms to Byron Highway with an at grade intersection. For
the interim project,the west end of the Midway Alternative conforms to
Vasco Road with a signalized at-grade intersection.
GRICULTURAL ENVIRONMENTAL IMPAC
The environmental impact associated with the Midway Alternative may be
significant in comparison to the Camino Diablo Alternative since 1.6
miles of the project traverses through existing open space and possible kit
fox habitat area:. In Girder to make Midway Alternative a through'
movement, a grade separated structure is required to overpass Vasco on
the west end,south-bound direction. The overhead structure requires
substantial foundation work close to an existing creek bank. It may
require heavy mitigation in this area..
SOCIO—ECt_NOM1C
Most of this alternative traverses through rolling hills and grasslands
except the last 0.34 miles cuts through farmland, and severance may be
needed for this parcel.
OS ;
The estimated cost of this brand new Midway Alternative is,$7.15 Million.
We assumed two at grade crossings are required at the UPRR tracks. This
cost estimate does not cover the grade separation version of the railroad
crossings.
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C. Byrom Airport Access Road
PROPOSED IMPROVEMENTS
This would be a 3.1 miles route with 2.1 miles of proposed new read
through open space and farmland. The remaining one mile would be
along the existing reconstructed Armstrong Road alignment, and it
requires minor shoulder widening on both sides of the existing roadway.
The now roadway consists of a 1,650 feet radius curve connects the south-
bound'Vasco Road to the northwest corner of the existing Armstrong
Read, and a new roadway extend 1.7 miles east from:Armstrong Byron
Hot Spring intersection and due southeast until it conforms at the existing
Byron Highway which is located on the west side of the SPRR tracks.
GRICULTURA.L AND ENVIRONMENTAL IMPA.O
There is no AG Core impact on this proposed alternative. There are
possible significant effects on rare and endangered species,including kit
fox and either species identified in the environmental studies for the Byron
Airport. The environmental document prepared for this project will be
required to analyze these potential impacts and mitigation.
IO—ECONOMI
The new roadway alignment traverses through the Vaquero Farms and
splits it into two parcels.
OS
The estimated cost of the Byron Airport Access Road Connector is$6.10
Million. This alternative avoids a new crossing of the UPRR right-of-
way.
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Dl FOCAL STREET CONNECTOR TO THE AIRPORT`
In order to improve the local road circulation to the airport.and be ready
for the airport to expand in the future, we propose to connect a new two
lane roadway from the intersection of Byron Hot Spring Road/Holey
Road, and extend about 0.76 miles north to the existing Byron Highway.
A new UPRR crossing is required.
The local community will benefit the most if this local connector can be
implemented with the Byron Airport Access Road East-'gest Connector
alternative. This local connector will provide a direct link from Byron
Highway to the airport. The estimated cost for this local connector is$2.65
Million.
VIII. RECOMMENDATIONS
The high costs to upgrade most of the existing Camino Diablo, and a long airport
access road are the culprits that make Camino.Diablo an impractical solution.
Midway Alternative traverses through high constraints biological areas, which
requires an EIR to determine the impacts to the environment. It is also difficult to
justify the usefulness of the airport access due to its high costs of implementing an
environmental mitigation unless we have no better alternatives. Bath Camino
Diablo and Midway Alternative doesn't provide an airport access to the Byron
Airport, and these alternatives will not be able to achieve the project goal to
improve the Circulation Element within Byron Community. Therefore, the
alternatives to Byron Airport Access Road Alternative should be refected.
The Byron Airport Access Road Alternative will have the least impact and the
least cost. Although an EIR will also be required for this alternative,the scale
involved is localized in a limited area, and it is a lot smaller than the Midway
Alternative. A local connector, which connects Byron Highway to the airport
access,will greatly improve the local traffic circulation and allow to
accommodate future expansion of the airport.
C:lbyip\Byron Airport Circulation Report\VascoByron EastWest Connectondoc
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CAMINO DIABLO ALTERNATIVE
TECHNICAL APPENDIX
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Preliminary Cost Estimate
Contra Costa County Department of Public Works
Project Name: CAMINO DIABLO-Vasco/Byron East-West Connector
Project Location- Camino Diablo to Byron Hwy.
Project Length: 9953 FT
Date of Estimate: 4/9/01 Revision No.
Revision Date
Prepared by: J.Wong
No. Description Quantity Units Unit Cost Total
I Mobilization I LS $100,600.00 $100,000.00
2 Clear and Grub I LS $4,000,00 $4,000.00
3 Traffic Control I LS $30,000.00 $30,000.00
4 Construction Area Signs I LS $1,600.00 $1,600.00
5 Earthwork(cut to fill) 8,934 CY $12.00 $107,208.00
6 (Haul off-site) 17,451 CY $4.60 $80,274.60
7 Asphalt concrete(Type A) 17,635 TON $40.00 $705,400,00
8 Aggregate Base(Class 3,0.8 in max.) 28,864 TON $15.00 $432,960.00
9 Aggregate Subbase(class 4) 43,296 TON $15.00 $649,440.00
10 Striping(Detail 6) 29,859 LF $0.40 $11,943.60
11 Drainage 470 LF $100.00 $47,000.00
12 IrTigation drainage 125 LF $840.00 $105,000.00
13 Byron Hwy RR zing 2 EA $455,000.00 $910,000m
14 Access Rd.(MC CABE RD.) I LS $90,000.00 $90,000,00
is Signalized Intersections 2 EA $128,000.00 $256,000.00
16 Roadside Sign 6 EA $200.00 $1,200.00
17 Fence 19,906 LF $5.00 $99,530.00
OTHER COSTS: Preliminary Engineering(15%) $544,733.43 SUBTOTAL $3,631,55610
Construction Engineering(15%) $544,733.43 OTHER COSTS $2,392,966.86
RW Engineering $8,500-00 SUBTOTAL $6,024,523.06
Real Property $25,000.00 CONTINGENCY* $417,628.96
R/W Acquisition $1,250,000.00 TOTAL $6,442,152.02
Environmental $20,000.00
Total OTHER COSTS $2,392,966.86
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MIDWAY
TECHNICAL APPENDIX
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.. . # Engineering preliminary Cost Estimate
Contra Costa County Department of Public Works
Project Name: MIDWAY-Vasco/Byron East-West Connector
Project Location: Vasco Road to Byron Hwy.Midway
Project Length: 8438 tt
Date of Estimate: 4/9/01 Revision No.
Revision Date
Prepared by: J.Wong
No. Description. Quantity Units Unit Cost Total
I Mobilization I LS $100,000.00 $100,000.00
2 Clear and Grub 1 LS $4,000.00 $4,000.00
3 Tratf`ic Control I LS $30,000.00 $30,000.00
4 Construction Area Signs I LS $1,600.00 $1,600.00
5 Earthwork(cut to fill) 44,858 CY $12.00 $538,296.00
6 (Haul off-site) 141,967 CY $4.60 $653,048.20
7 Asphalt Concrete(Type A) 14,950 TON $40.00 $598,000.00
8 Aggregate Base(Class 3,0.8 in max..) 24,470 TON $15.00 $367,050.00
9 Aggregate Subbase(Class 4) 36,705 TON $15.00 $550,575.00
10 Striping(Detail 6) 25,314 LF $0.40 $10,125.60
11 Drainage 1,685 LF $100.00 $168,500.00
12 Drainage Inlets(Type C) 2 EA $1,500.00 $3,000.00
13 Irrigation drainage 125 LF $420.00 $52,500.00
14 Byron Hwy RR zing 2 EA $455,000.00 $910,0(10.00
is Signalized Intersections 2 EA $128,000.00 $256,000.00
16 Roadside Sign 6 EA $200.00 $1,200.00
17 Fence 16,076 LF $5.00 $80,380.00
18 Culvert for Kit Fox Path 132 CY $749.00 $98,868.00
19 MBGR(Breakaway Type B) 800 LF $25.00 $20,000.00
20 Terminal Section 8 EA $300.00 $2,400.00
21 Class I Flexible Delineator(A73C) 8 EA $75.00 $600.00
OTHER COSTS: Preliminary Engineering(1511%) $666,921.42 SUBTOTAL $4,446,142.80
Construction Engineering(15%) $666,921.42 OTHER COS'T'S $2,189,842.84
RW Engineering $6,000.00 SUBTOTAL $6,635,985.64
Real Property $15,000.00 CONTINGENCY* $511,306.42
R/W Acquisition $800,000.00 TOTAL $7,147,292.06
Environmental $35,000.00
Total OTHER COSTS $2,189,842.84
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BYR.ON AIRPORT ALTERNATIVE
TECHNICAL APPENDIX
...111.111.1............................................................................11...........-...I............-
............11.....................................................................................
.. ...................... ...
Transp•ortation Engineering Preliminary Cost Estimate
Contra Costa County Department of Public Works
Project Name: BYRON AIRPORT-Vasco/Byron East-West Connector
Project Location: Vasco to Exist Armstrong Rd,and Byron Hwy
Project Length: 14250 FT
Date of Estimate. 4/2/01 Revision No.
lRevision Date
Prepared by: B Yip
No. Description Quantity Units Unit Cost Total
1 Mobilization I LS $100,000.00 $100,000.00
2 Clear and Grub I LS $8,000.00 $8,000.00
3 Traffic Control I LS $30,000.00 $30,000.00
4 Construction Area Signs I LS $4,000.00 $4,000.00
5 Earthwork(cut to fill) 39,041 CY $11.00 $429,451.00
6 Import Materials(7125CY from Airport Access Rd) 69,638 CY $5.50 $383,009.00
7 AC 18,320 TON $40.00 $732,800.00
8 Aggregate Base(Class 3,0.8 in max.) 29,535 TON $15.00 $443,025.00
9 Class 4 ASB 44,302 TON $15.00 $664,530.00
10 Striping 42,600 LF $0.40 $17,040.00
11 Drainage 400 LF $100.00 $40,000.00
12 Extend Exist Conc box culvert 12'to the south 94 CY $475.00 $44,650.00
13 Extend Irrigation Canal crossing 12 LF $840.00 $10,080m
14 CL Fence(6) 25,300 LF $5.00 $126,500.00
15 Class I Flexible Delineator 4 EA $75.00 $300.00
16 Terminal Section(Type C) 4 EA $300.00 $1,200.00
17 Metal Beam Guard Rail(Breakaway Type B) 2,850 LF $25,00 $71,250.00
18 Driveway Conform 4 EA $2,000.00 $8,000.00
19 Signalized Intersections 2 LS $128,000.00 $256,000,00
20 Roadside Sign 20 LS $200.00 $4,000.00
OTHER COSTS: Preliminary Engineering(15%) $506,075.25 SUBTOTAL $3,373,835.00
Construction Engineering(15%) $506,075.25 OTHER COSTS $2,321,150.50
RW Engineering $9,000.00 SUBTOTAL $5,694,985.50
Real Property $15,000.00 CONTINGENCY* $387,991.03
R/W Acquisition $1,275,000.00 TOTAL $6,082,9716.53
Environmental $10,000.00
Total OTHER COSTS $2,321,150.50
CONTINGENCY is 10%of(SUBTOTAL plus Construction Engineering)
,. .. . Engineering Preliminary Cost estimate
Contra Costa County Department of Public Works
Project Name: BYRON AIRPORT ACCESS-Vasco/Byron East-West Connector
1,+
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Project Location: Byron Hot Spring Road to Byron Hwy
Project Length: 4200 FT
Date of Estimate: 4/2/01 Revision No.
Revision Date
Prepared by: B Yip
No. Description Quantity Units Unit Cost Total
I Mobilization 1 LS $6,000.00 $6,000.00
2 Clear and Grub 1 LS $3,000.00 $3,000.00
3 Traffic Control 1 LS $12,000.00 $12,000.00
4 Construction Area Signs I LS $800.00 $800.00
5 Earthwork(cut to fill) 3,534 CY $13.00 $45,942.00
6 Import Materials(7125CY from Airport Access Rd) 2,265 CY $5,50 $12,457.50
7 AC 7,434 TON $40.00 $297,360.00
8 Aggregate Base(Class 3,0.8 in max..) 11,985 TON $15.00 $179,775.00
9 Class 4 ASB 17,978 TON $15.00 $269,670.00
10 Striping 12,600 LF $0.40 $5,040.00
11 Drainage 600 LF $100.00 $60,000.00
12 Roadside Sign 12 LS $200.00 $2,400.00
13 Byron Hwy RR Xing 1 LS $455,000.00 $455,000.00
14 Signalized Intersections 2 EA $128,000.00 $256,000.00
15 6,Chain Link Fence 25,300 LF $5.00 $126,500.00
OTHER COSTS: Preliminary Engineering(15%) $259,791.68 SUBTOTAL $1,731,944.50
Construction Engineering(15%) $259,791.68 OTHER COSTS $711,583.35
RW Engineering $3,000.00 SUBTOTAL $2,443,527.85
Real Property $6,000.00 CONTINGENCY* $199,173.62
R/WAcquisition $180,000.00 TOTAL $2,642,701.47
Environmental $3,000.00
Total OTHER COSTS $711,583.35
1)1'0FAI S2 643,000
*CONTINGENCY is 10%of(SUBTOTAL plus Construction Engineering)
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Exhibit "B". Draft Letter from CDD Director to Chair,
East County Transportation Improvement
Authority
enni
Community Contra C omm My Berry,pme
CP
Gmmuni Development Director
Development Costa
Department County
County Administration Building
551 Pine Street; .,.
4th Floor,North Wing
Martinez,California 94553-0095
a' inn
(925) 335-1276
Phone: rA coy
The Honorable Donald P. Freitas
Chair, East County Transportation Improvement Authority
255 Glacier Drive
Martinez, CA 14553
Dear Mr. Freitas:
I am writing in regard to a request from the State Route 4 Bypass Authority,dated October
30, 2002, asking Contra Costa County to amend our General Plan to include the proposed
Byron Airport Road. A copy of this request is attached for your reference.
The Board of Supervisors has authorized County staff to proceed with the General Plan
Amendment as requested. As the next step in the process, please authorize your staff to
execute a funding agreement with the Contra Costa County Community Development
Department to cover our staff costs for the requested General Plan Amendment and related
environmental studies. It is our understanding the East County Transportation Improvement
Authority has funds budgeted for this purpose.
Thank you for your interest in this important project. If you have questions about this
request,please contact Patrick Roche, Advance Planning Division, at(925) 335-1242.
Sincerely,
Dennis M. Barry, AICD
Community Development Director
CC: Members,Board of Supervisors
Clerk of the Board
J.Sweeten,CAO
J.Bueren,Public Works Dept.
S.Goetz,Community Development Dept.
G:rrsnsportadon\Greitzarl ettQ\Drak+byrai eitpm va 1cW.CocAtWtm=t
Office Hours Monday- Friday: 8:00 a.m. -5:00 p.m.
Office is closed the 1 st, 3rd & 5th Fridays of each month
Exhibit "A": "Byron Airport Circulation Report", dated
July 15, 2002
RYRON AIRPORT CIRCULATION REPORT
July 15, 2002
I. PURPOSE OF THIS REPORT
The purpose of this report is to provide background information for a General Plan
Amendment(GPA)process for the Byron Airport Circulation Project. The GPA process
will involve analysis of the proposed project and other alternatives, reaching agreement
on a preferred alternative,and obtaining all necessary environmental clearances for the
preferred alternative so it can be amended into the Transportation and Circulation
Element of the General Plan. This report is a joint document prepared and supported by
both the Public Works and Community Development Department staffs.
Ii. INTRODUCTION/BACKGROUND
In the mid 70's, Contra Costa County conducted an airport study and identified the need
for one or more new airports to relieve the aircraft parking and to ease the busy Buchanan
Field in Concord. Two different sites,one at Oakley and the other in Lone Tree Valley,
were proposed during the course of the studies.After much debate,both were dropped
because of community opposition. The sites were considered to be more suitable for
urban development. With these prospective sites eliminated, attention turned to the idea
of County acquisition and development of privately owned Byron Airpark located in the
southeastern area of the County. The fact that it was already an operating airport, and was
not in an urban expansion area,made it an attractive possibility.
With many years of planning and building new runways,new Byron Airport has been in
operation since 1994. A wide variety of flying activities including sky diving, sailplane
flights, and ultralight aircraft operations take place at Byron. Although future
urbanization of the east County will undoubtedly lead to greater business use of Byron
Airport,current planning envisions the airport's predominant role to remain as a location
for personal and recreational flying. The public can access the airport via some poor,
limited, and unimproved roads such as Armstrong Road, and Byron Hot Springs Road via
Byron Highway. There is no roadway connection east to Vasco Road that leads to
Alameda County. An east-west connector,which links Vasco Road to Byron Highway,
will definitely increase the circulation around the Byron airport areas. This new
connector will also encourage residents of eastern Alameda to use the airport.
Eastern Contra Costa County is experiencing significant residential growth due to the
availability of land, location, and the need for affordable housing. The Association of
Bay Area Governments (ABAG) forecasts that the number of households in Antioch and
Brentwood are projected to increase 39% and 134%respectively by the year 2020.
(Source: ABAG, Projections, 1998) Both commercial and residential development will
expand concurrently, making this area a growth center for the next twenty-five years.
The result of this growth will be ever increasing traffic demands on State Route 4(SR4),
1
State Route 4 Bypass (SR4BP), and the local roadway network. The population growth
will increase the demand for commute traffic and goods movements, while at the same
time, operational problems on SR4, and local roadways could create serious traffic
congestion.
In November 1994, Contra Costa County Public Works Department conducted a State
Route 4 Bypass East-West Connector Alternative Study which presents a preliminary
assessment of various alternatives for the East-West Connector between the proposed
SR4Bypass and existing SR4. The proposed East-West Connector will provide an
alternate East-West route for the increasing truck traffic within this region. It also helps
shifting regional traffic away from local communities. Byron Highway carries a large
volume of trucks (about 20% of the total traffic volumes, Caltrans 93 Track
Volumes/Percentages)between eastern Contra Costa County and the warehousing areas
of Tracy and provides access to routes leading to I-5 and the Central Valley. The Vasco
/Byron Connector will share the same functions similar to the Bypass East-West
Connector. When portion of the truck traffic route through the Vasco/Byron Connector,it
will reduce the environmental impacts to the nearby communities such as improving air
quality,reducing traffic noise,prolonging the road pavement's life cycle, and reducing
local road traffic congestion.
State law provides for two new state highways in the area. State Route 239 would
connect Brentwood with Tracy via the Byron Highway Corridor. State Route 84(also
known as the East County Corridor)would connect Brentwood and Livermore via the
Vasco Road Corridor. Both of these proposals are supported in the County General Plan.
However, there is no consensus among the affected counties on how to proceed with their
implementation, so they remain as long-range improvements. Inter-regional trips to and
from Eastern Contra Costa must utilize low capacity conventional highways(Route 4 to
I-680, BART and TriDelta bus lines, Route 4 to I-5, Route 160 to I-80, Byron Highway
to 1-205 and I-580, Vasco Road to I-580) or travel significant distances to access the
State's primary arterials.
A potential near term project to improve circulation in the vicinity of Byron Airport is to
construct an east-west road to connect Byron Highway with Vasco Road. This connection
would allow regional traffic to utilize Vasco Road in lieu of Byron Highway north of the
airport, and bypass the community of Byron. It is also one of several primary goals to
improve and integrate the airport access roads into the inter-regional roadway network. In
order to obtain a better inter-regional roadway system in the East County,the
construction of a designated East-West connector between Vasco Road and Byron
Highway, and a local two lane connector will provide more balanced distributions of
current and future traffic over the entire roadway network in this area.
III. GOALS OF PROPOSED PROJECT
The proposed project goals are summarized as follows:
♦ Provide changes to the Circulation Element of the General Plan.
z
.._. __. ...... _........ ....._._..... . .__. ........ . _. . _...
.. _ ...... ....... ....... ....... ...... ........ ........ ....._... ................. ..
♦ Provide access to the Byron Airport, which facilitates and enhances its operation as
an airport.
♦ Improve and integrate the airport access road into the inter-regional Bay area roadway
network.
♦ Improve the regional traffic within Eastern Contra Costa County by connecting Vasco
Road to Byron Highway.
♦ Promote airport usage by the nearby Counties.
♦ Avoid/minimize the impact to the biologically sensitive areas between south of
Camino Diablo and north of Armstrong Road.
IV. GENERAL CONSTRAINTS
A. ALTERNATIVE LOCATION
The SR4BP connects SR4/SR160 junctions south to Vasco Road at
Walnut Boulevard. The East County Corridor extends south along Vasco
Road towards Alameda County. Vasco Road alignment runs southwest
after it passes the Byron Airport: On the other hand, Bryon Highway runs
southeast parallel to the Union Pacific Railroad(UPRR). At Bruns Road,
the alignment diverges ftu-ther southeast away from the Vasco alignment.
We cannot eliminate the possibility of finding an alternative East-West
Connector south of Byron Airport,but this alternative will be much more
expensive due to its project length and it has more impact on designated
habitat areas or corridor areas. Therefore,we would like to limit our
alignment search area between north of Byron Airport to south of Camino
Diablo.
B. RAILROAD GEOMETRY
The Union Pacific Railroad(UPRR)track runs parallel to Byron Highway
about 100 feet apart, and the track elevation is 3 feet or more higher than
the finished grade on Byron Highway. This geometric constraint,both
vertical and horizontal, constitutes a great difficulty to make an
economical and effective railroad crossing. At this present time, we
assume all new railroad crossings are at-grade intersections;with the new
alternative alignments.
Any new railroad grade crossings and grade separations, and any
relocations of alternatives of existing crossings must be cleared with the
railroad company and approved by the Public Utilities Commission
(PUC). A more detailed study should be made to determine a more cost-
effective railroad crossing solution.
3
C. TOPOGRAPHY
The East-West Connector runs from east of Vasco Road to west of Byron
Highway. The topographic features change from rolling hills on the west
to relatively flat farmland on the east. A uniform design speed is difficult
to maintain due to the abrupt changes in ground elevation. Elevation in
the planning area ranges from 25 feet to 200 feet above mean sea level.
The steep grade incline on the roadway will hinder the truck flow on the
corridor. According to Caltrans standards, a steep roadway grade exceeds
4% and the incline length more than 250 feet, a separate analysis based on
Chapter 3 of the 1994 Highway Capacity Manual, will determine if a truck
climbing lane is required or not.
D. LAND USE
According to the County General Plan,majority of the study area is
classified as Agricultural Lands except the airport boundaries. The
boundaries of the airport encompass some 1,307 acres, less than half of
these aviation facilities are reserved for fixture development. The southern
and western parts of the property are designed for wildlife and habitat
preservation. The Airport is designated as Public and semi-Public.
E. BIOLOGICAL
Biological Constraints Analysis performed by Lawrence P. Stormberg in
December 1994 indicated that the entire area is within the range of the San
Joaquin kit fox. All grassland and oak savannah habitat and the irrigated
pastures in the area provide a breeding ground for the kit fox. The
presence of the kit fox and the characterization of all non-cropped and
non-developed lands as occupied kit fox habitat, therefore,pose a potential
significant constraint to development in the planning area.
Based on the biological sensitive area map provided by the airport,we
mapped the High Constraints Area(Level One)on our preliminary design
file and make sure the alignment does not cross with these high constraints
areas. If it does,mitigation will be required to mitigate any conflicts.
High Constraints (Level One)is defined by Mr. Stormberg as the area
occupied by the kit fox habitat and are often characterized by the presence
of more than one sensitive biological resource.
The Department of Fish and Game acquired the open space north of
Armstrong Road by private venture selling rights, and designated this area
as a biological sensitive area.
4
F. UTILITY
IRRIGATION CANAL:
The Byron-Bethany Irrigation District 45 Canal flows northward through
the eastside of the Byron area along the 45-foot contour line. This concrete
lined trapezoidal channel carries water for farm irrigation,and it serves as
drinking water for residents as well. Each alternative crosses at least one
irrigation canal except the Bryon Airport Access Road alternative, which
intercepts two canals at the cast end. Under-grounding of these irrigation
facilities should not constitute any serious constraint to the project.
V. ALTERNATIVE ALIGNMENT SELECTION CRITERIA
The County staff has selected road alignments for the East-West Connecter based on the
following criteria: avoid relocation of existingresidents, avoid permanent land uses,
avoid agricultural core lands, avoid severance of land parcels,protect archeological sites,
protect habitats of endangered species, protect wetlands,ponds and riparian habitat,
coordinate with existing and proposed utilities,and minimize project costs. These criteria
generally have equal priority and the goal is to obtain a proper balance between all of the
various criteria,with the primary goal having an alignment that achieves the project
goals.
VI. PROJECT DATA
A. GEOMETRIC DESIGN CRITERIA
This two lane conventional highway will be designed using Caltrans
highway design standards since this is typical of county roads. The design
speed for the proposed East-West Connector is 65 mph. The minimum
curve radius for this design speed is 1,650 feet. The minimum tangent on
reversing curves is 400 feet. Design speed on some of the alternatives
may decrease to suit the steep grade condition.
B. TYPICAL SECTION
The proposed typical section(Technical appendix)for East-West
Connector consists of 2-3.6m(12 feet)traffic lanes, 2-2.4m(8 feet)
shoulders, and 2-3.Om(10 feet)for buffer zone. A total of 18m(60 feet) is
required for the interim constructions, and the County anticipates the need
to preserve 33.5m(110 feet)ultimate right-of-way for a future four-lane
roadway.
5
C. STRUCTURAL SECTION
For cost estimate purposes, we assume a truck route structural section as
follows:
180 mm Type A Asphalt Concrete
300 mm Type B Aggregate Base
450 mm Type C Aggregate Subbase
D. ENGINEERING ANALYSIS
The County Public Works staff utilized a County owned digital terrain
model surface and a Civil Engineering application program to push a
roadway template along the proposed horizontal and vertical alignment
which creates a design project for each alternative. When the computer-
aided analysis is done,we would be able to determine the amount of right-
of-way required and the earthwork quantity involved in each alternative.
E. ULTIMATE SOUTHBOUND VASCO CONNECTION—Grade
separation
In order to make the ultimate southbound Vasco connection to Byron
Highway a through movement, a grade separated bridge structure is
required for both MIDWAY and Byron.Airport Access Road alternatives.
The bridge length span over the existing Vasco Road is about 740 feet. A
separate study should investigate the possibility of building a two lane
structure for the ultimate configuration, and use the slow lane as a truck
climbing lane.
6
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VII. PROPOSED ALTERNATIVES
A. CAMINO DIABLO
PROPOSED IMPROVElVIENTS
Camino Diablo currently extends approximately 2.0 miles from the
proposed crossing with the Vasco Road to Byron Highway. It is
anticipated.that 0.5 miles of Camino Diablo would require horizontal and
vertical realignment and road reconstruction in order to meet State
Highway standards. The remaining 2 miles of new pavement begins at
1,250m(4,000 feet)west ofByron/Camino Diablo intersection,and
extends south-east for about 3.05 Kin (1.89 miles). The alignment will
cross with UPRR.tracks and conform to Byron Highway with an at grade
intersection.
[AGRICULTURAL AND ENVIRONMENTAL QAC
There is no Ag Core impact with this alternative. The new roadway
traverses through existing open space and agricultural lanais. Since
Camino Diablo, and Byron Highway are existing roads, the anticipated
impact on the environ-hent is minimal. However, the area of horizontal
and vertical realignment and road reconstruction has been identified as a
habitat of the San Joaquin fait fox.
$000=ECONOMIC
The Camino Diablo Alternative would impact approximately 40-50 homes
and there may be an associated economic impact to the community of
Byron. This alternative would direct regional traffic through the center of
Byrom. There may be more significant impacts in Byron due to the
intersection of this alternative,Byron Highway, and two UPRR crossings.
Parcel severance is also significant, as the proposed roadway would split
several ranches. The new roadway cuts off a dirt road access to one
property;therefore, an alternative access path must be installed to mitigate
this problem,.
The cost estimate does not include costs for upgrading the existing section
of Camino Diablo. The cost estimate to construct the new roadway on
Camino Diablo alternative is $6.45 Million with an itemized cost estimate
included in the Technical Appendix. This alternative may require two at
grade crossings of the UPRR right-of-way immediately adjacent to Byron
10
Highway. If the Union Pacific Railroad object to the idea of an at grade
intersection with their facility,then a grade separation would be rewired.
B. MIDWAY
RCPCJSED IMPROVEMENTS
This alternative locates at the midway between Camino Diablo and
Armstrong Road. It T's-off from Vasco Road at about 4,000 feet north of
Armstrong Road and extend east along the perimeter of the High
Constraints Area for about 8,500 feet(1.6 miles) until it crosses with
UPRR and conforms to Byron Highway with an at grade intersection. For
the interim project,the west end of the Midway Alternative conforms to
Vasco Road with a signalized at-grade intersection.
GRICULTURAL ENVIRONMENTAL IMPAC
The environmental impact associated with the Midway Alternative may be
significant in comparison to the Camino Diablo Alternative since 1.6
miles of the project traverses through existing open space and possible kit
fox habitat area. In order to make Midway Alternative a through
movement, a grade separated structure is required to overpass Vasco on
the west end, south-bound direction. The overhead structure requires
substantial foundation work close to an existing creek bank. It may
require heavy mitigation in this area.
OCIO—ECONOMI
Most of this alternative traverses through rolling hills and grasslands
except the last 0.34 miles cuts through farmland, and severance may be
needed for this parcel.
OS'I�
The estimated cost of this brand new Midway Alternative is $7.15 Million.
We assumed two at grade crossings are required at the UPRR tracks. This
cost estimate does not cover the grade separation version of the railroad
crossings.
11
C. Byron Airport Access Road
R:t3POSED IMPROVEMENTS
This would be a 3.1 miles route with 2.1 miles of proposed new road
through open space andfarmland. The remaining one mile would be
along the existing reconstructed Armstrong Road alignment, and it
requires minor shoulder widening on both sides of the existing roadway.
The new roadway consists of a 1,650 feet radius curve connects the south-
bound Vasco Road to the northwest comer of the existing.Armstrong
Road, and a new roadway extend 1.7 miles east from Armstrong/Byron
Hot Spring intersection and due southeast until it conforms at the existing
Byron Highway which is located on the west side of the SPRR tracks.
GRICULTURAL AND ENVIRONMENTAL IlviPAC
There is no AG Care impact on this proposed alternative. There are
possible significant effects on rare and endangered species, including kit
fox and other species identified in the environmental studies for the Byron
Airport. The environmental document prepared for this project will be
required to analyze these potential impacts and mitigation.
SgCIO—ECONGWC
The new roadway alignment traverses through the Vaquero Farms and
splits it into two parcels.
OS
The estimated cost of the Byron Airport Access Road Connector is$6.10
Million. This alternative avoids a new crossing of the UPRR right-of-
way.
12
D LOCAL STREET CONNECTOR TO THE AIRPORT
In order to improve the local road circulation to the airport and be ready
for the airport to expand in the future,we propose to connect a new two
lane roadway from the intersection of Byron Hot Spring Road/Holey
Road, and extend about 0.76 miles north to the existing Byron Highway.
A new UPRR crossing is required.
The local community will benefit the most if this local connector can be
implemented with the Byron Airport Access Road East-West Connector
alternative. This local connector will provide a direct link from Byron
Highway to the airport. The estimated cost for this local connector is$2.65
Million.
VIII. RECOMMENDATIONS
The high costs to upgrade most of the existing Camino Diablo, and a long airport
access road are the culprits that make Camino Diablo an impractical solution.
Midway Alternative traverses through high constraints biological areas,which
requires an EIR to determine the impacts to the environment. It is also difficult to
justify the usefulness of the airport access due to its high costs of implementing an
environmental mitigation unless we have no better alternatives. Both Camino
Diablo and Midway Alternative doesn't provide an airport access to the Byron
Airport, and these alternatives will not be able to achieve the project goal to
improve the Circulation Element within Byron Community. Therefore, the
alternatives to Byron Airport Access Road Alternative should be rejected.
The Byron Airport Access Road Alternative will have the least impact and the
least cost. Although an EIR will also be required for this alternative,the scale
involved is localized in a limited area, and it is a lot smaller than the Midway
Alternative. A local connector,which connects Byron.Highway to the airport
access, will greatly improve the local traffic circulation and allow to
accommodate future expansion of the airport.
C:\byip\Byron Airport Circulation Report\Vascosyron EastWest Connector.doc
13
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. .. ....... ........................................................................................................................... ......................... ... ................ .......
CAMINO DIABLO ALTERNATIVE
TECHNICAL APPENDIX
',Tran8portation EngineeringPreliminary Cast Estimate
Contra Costa County Department of Public Works
Project Name: CAM NO DIABLO-Vasco/Byron East-West Connector
Project Location: Camino Diablo to Byron Hwy.
Project Length: 9953 FT
Date of Estimate: 4/9/01 Revision No.
Revision Date
Prepared by: J.Wong
No. Description Quantity Units Unit Cost Total`
1 Mobilization 1 LS $100,000.00 $100,000.00
2 Clear and Grub 1 LS $4,000.00 $4,000.00
3 Traffic Control 1 LS $30,000.00 $30,000.00
4 Construction Area Signs I LS $1,600.00 $1,600.00
5 Earthwork(cut to fill) 8,934 CY $12.00 $107,208.00
6 (Haul off-site) 17,451 CY $4.60 $80,274.60
7 Asphalt concrete(Type A) 17,635 TON $40.00 $705,400.00
8 Aggregate Base(Class 3,0.8 in max.) 28,864 TON $15.00 $432.,960.00
9 Aggregate Subbase(class 4) 43,296 TON $15.00 $649,440.00
10 Striping(Detail 6) 29,859 LF $0.40 $11,943.60
11 Drainage 470 LF $100.00 $47,000.00
12 Irrigation drainage 125 LF $840.00 $105,000.00
13 Byron Hwy RR ung 2 EA $455,000.00 $910,000.00
14 Access Rd.(MC CABE RD.) 1 LS $90,000.00 $90,000.00
15 Signalized Intersections 2 Eta $128,000.00 $256,000.00
16 Roadside Sign 6 EA $200.00 $1,200.00
17 Fence 19,906 LF $5.00 $99,530.00
18 '
OTHER COSTS: Preliminary Engineering(15%) $544,733.43 SUBTOTAL $3,631,556.20
Construction Engineering(15%) $544,733.43 OVER COSTS $2,392,966.86
RW Engineering $8,500.00 SUBTOTAL $6,024,523.06
Real Property $25,000.00 CONTINGENCY* $417,62:8.96
R)WAcquisition $1,250,000.00 TOTAL $6,442,152.02
Enviromental $20,000.00
Total OTHER COSTS $2,392,966.86
*CONTINGENCY is 10%of(SUBTOTAL plus Construction Engineering)
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MIDWAY
TECHNICAL APPENDIX
Transportation EngineeringPreliminary Cost Estimate
Contra Costa County Department of Public Warks
Project Name: MIDWAY-Vasco/Byron East-West Connector
Project Location: Vasco Road to Byron Hwy.Midway t
Project Length: 8438 ft
Date of Estimate: 4/9/01 Revision No.
Revision Date
Prepared by: I.Wong
No. Description Quantity Units Unit Cost 'Total
1 Mobilization I LS $100,000.00 $100,010.00
2 Clear and Grab 1 LS $4,0G0.00 $4,000.00
3 Traffic Control 1 LS $30,000.00 $30,040.00
4 Construction Area Signs 1 LS $1,600.00 $1,600.00
5 Earthwork(cut to fill) 44,858 CY $12.00 $538,296.00
6 (Haul off-site) 141,967 CY $4.60 $653,048.20
7 Asphalt Concrete(Type A) 14,950 TON $40.00 $598,000.00
8 Aggregate Base(Class 3,0.8 in max.) 24,470 TON $15.00 $367,050.00
9 Aggregate Subbase(Class 4) 36,705 TON $15.00 $550,575.00
10 Striping(Detail 6) 25,314 LF $0.40 $10,125.60
11 Drainage 1,685 LF $100.00 $168,500.00
12 Drainage Inlets(Type C) 2 EA $1,500.00 $3,000.00
13 Irrigation drainage 125 LF $420.00 $52,500.00
14 Byron Hwy RR xmg 2 EA $455,00G.00 $910,000.00
15 Signalized Intersections 2 EA $128,000.00 $256,000.00
16 Roadside Sign 6 EA $200.00 $1,200.00
17 Fence 16,076 LF $5.00 $80,380.00
18 Culvert for Kit Fox Path 132 CY $749.00 $98,868.00
19 MBGR(Breakaway Type B) 800 LF $25.00 $20,000.00
20 Terminal Section 8 EA $300.00 $2,400.00
21 Class I Flexible Delineator(A73C) 8 EA $75.00 $600.00
OTHER.COSTS: Preliminary Engineering(15%) $666,921.42 SUBTOTAL $4,446,142.80
Construction Engineering(15%) $666,921.42 OTHER COSTS $2,189,842.84
RW Engineering $6,000.00 SUBTOTAL $6,635,985.64
Real Property $15,000.00 CONTINGENCY* $511,306.42
ROW Acquisition $800,000.00 TOTAL $7,147,292.06
Environmental $35,000.00
Total OTHER COSTS $2,189,842.84
➢ROUNDED
*CONTTNNTGENCY is 10%of(SUBTOTAL plus Construction Engineering)
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BYRON AIRPORT ALTER:I`+TATIVE
TECHNICAL APPENDIX
'-- : Preliminary Cost Estimate
Contra Costa Count),Department of Public Works
Project Name: BYRON AIRPORT-Vasco/Byron East-gest Connector
Project Location: Vasco to Exist Armstrong Rd,and Byron Hwy
Project Length: 14250 FT
Date of Estimate: 4/2/01 Revision No.
Revision Date
Prepared by: B Yip
No. Description Quantity Units Unit Cost Total
1 Mobilization I LS $100,000;00 $100,000.00
2 Clear and Grub I LS $8,000.00 $8,000.00
3 Traffic Control I LS $30,000.00 $30,000.00
4 Construction Area Signs 1 LS $4,000.00 $4,000.00
5 Earthwork(cut to fill) 39,041 CY $11.00 $429,451.00
6 Import Materials(7125CY from Airport Access Rd) 69,638 CY $5.50 $383,009.00
7 AC 18,320 TON $40.00 $732,800.00
8 Aggregate Base(Class 3,0.8 in max.) 29,535 TON $15.00 $443,025.00
9 Class 4 ASB 44,302 TON $15.00 $664,530.00
10 Striping 42,600 LF $0.40 $17,040.00
11 Drainage 400 LF $100.00 $40,000.00
12 Extend Exist Conc box culvert 12'to the south 94 CY $475.00 $44,650.00
13 Extend Irrigation Canal crossing 12 LF $840.00 $10,080.00
14 CL Fence(6) 25,300 LF $5.00 $126,500.00
15 Class I Flexible Delineator 4 EA $75.00 $300.00
16 Terminal Section(Type C) 4 EA $300.00 $1,200.00
17 Metal Beam Guard Rail(Breakaway Type B) 2,850 LF $25.00 $71,250.00
18 Driveway Conform 4 EA $2,000.00 $8,000.00
19 Signalized Intersections 2 LS $128,000.00 $256,000.00
20 Roadside Sign 20 LS $200.00 $4,000.00
OTHER COSTS: Preliminary Engineering(15%) $506,075.25 SUBTOTAL $3,373,835.00
Construction Engineering(15%) $506,075.25 O'T'HER COSTS $2,321,150.50
RW Engineering $9,000.00 SUBTOTAL, $5,694,985.50
Real Property $15,000.00 CONTINGENCY* $387,991.03
RIWAcquisition $1,275,000.00 TOTAL $6,082,976.53
Environmental $10,000.00
Total OTHER'COSTS $2,321,150.50
i t
,083,000
*CONTINGENCY is 10%of(SUBTOTAL,plus Constriction Engineering)
.. .._...... ..........
iTransportation Engineering Preliminary Cost Estimate
Contra Costa Count-Department of Public Works
Project Name: BYRON AIRPORT ACCESS-Vasco/Byron East-West Connector
t,
Project Location: Byron Hot Spring Road to Byron Hwy
Project Length: 4200 FT
Date of Estimate: 4/2/01 Revision No.
Revision Date
Prepared by: B Yip
No. Description Quantity Units Unit Cost Total
I Mobilization I LS $6,000.00 $6,000.00
2 Clear and Grub I LS $3,000.00 $3,000.00
3 Traffic Control 1 LS $12,000.00 $12,000.00
4 Construction Area Signs I LS $800.00 $800.00
5 Earthwork(cut to fill) 3,534 CY $13.00 $45,942.00
6 Import Materials(7125CY from Airport Access Rd) 2,265 CY $5.50 $12,457.50
7 AC 7,434 TON $40.00 $297,360.00
8 Aggregate Base(Class 3,0.8 in max.) 11,985 TON $15.00 $179,775.00
9 Class 4 ASB 17,978 TON $15.00 $269,670.00
10 Striping 12,600 LF $0.40 $5,040.00
11 Drainage 600 LF $100.00 $60,000.00
12 Roadside Sign 12 LS $200.00 $2,400.00
13 Byron Hwy RR Xing I LS $455,000.00 $455,000.00
14 Signalized Intersections 2 EA $128,000.00 $256,000.00
15 6,Chain Link Fence 25,300 LF $5.00 $126,500.00
OTHER COSTS: Preliminary Engineering(15%) $259,791.68 SUBTOTAL $1,731,944.50
Construction Engineering(15%) $259,791.68 OTHER COSTS $711,583.35
RW Engineering $3,000.00 SUBTOTAL $2,443,527.85
Real Property $6,000.00 CONTINGENCY* $199,173.62
R/W Acquisition $180,000.00 TOTAL $2,642,701.47
Environmental $3,000.00
Total OTHER COSTS $711,583.35
*CONTINGENCY is 10%of(SUBTOTAL plus Construction Engineering)
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Exhibit "B": Draft Letter from CDD Director to Chair,
East County Transportation Improvement
Authority
Contra
Dennis M.Barry,ACCP
Community Con 41 a Community Development Director
Development USL�
Department Coun (
County Administration Building
651 Pine Street
4th Floor,North Vying
Martinez,California 94553-0095 ;
(925) 3351276 _ v
Phone: rh
The Honorable Donald P. Freitas
Chair,East County Transportation Improvement Authority
255 Glacier Drive
Martinez, CA 94553
Dear Mr. Freitas:
I am writing in regard to a request from the State Route 4 Bypass Authority,dated October
30, 2002, asking Contra Costa County to amend our General Plan to include the proposed
Byron Airport Road. A copy of this request is attached for your reference.
The Board of Supervisors has authorized County staff to proceed with the General Plan
Amendment as requested. As the next step in the process, please authorize your staff to
execute a funding agreement with the Contra Costa County Community Development
Department to cover our staff costs for the requested General Plan Amendment and related
environmental studies. It is our understanding the East County Transportation Improvement
Authority has funds budgeted for this purpose.
Thank you for your interest in this important project. If you have questions about this
request,please contact Patrick Roche, Advance Planning Division, at(925) 335-1242.
Sincerely,
Dennis M. Barry,AICP
Community Development Director
CC: Members,Board of Supervisors
Clerk of the Board
I.Sweeten,CAO
J.Bueren,Public Works Dept.
S.Goetz,Community Development Dept.
G:'.Tmmperos o\rreit \lxtta\DTaft)ron airpm gpe 1c .dmAauhm
Office Hours Monday- Friday: 8:00 a.m. -5:00 p.m.
_ Office is closed the 1 st, 3rd& 5th Fridays of each month