HomeMy WebLinkAboutMINUTES - 07222008 - C.4 (2) TO: BOARD OF SUPERVISORS
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FROM: JULIA R. BUEREN, PUBLIC WORKS .DIRECTO - Ia Costa
DATE: JULY 22, 2008 County.,
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SUBJECT: APPROVE Addendum #2 to the Bethel Island Bridge Replacement Project Mitigated Negative
Declaration in compliance with the California Environmental Quality Act, Bethel Island area.
(88% Highway. Bridge Rehabilitation and Replacement Program Funds and 12% Local Road
Funds).(District V) [CDD=CP# 03-36] Project No.: 0662-6R4043
SPECIFIC REQUEST(S)OR RECOMMENDATION(S)&BACKGROUND AND JUSTIFICATION
RECOMMENDED ACTION:
APPROVE the Second Addendum to the Bethel Island Bridge Replacement Project Mitigated Negative
Declaration in compliance with the California Enviromnehtal Quality Act, and
FIND that the changes to the project description are minor and technical in nature and do not create any
environmental impacts not previously addressed in the Mitigated Negative Declaration and Addendum #l, and
DIRECT the Director of the Department of Conservation and Development, Community Development Division
to file a Notice o fletermination with the.County Clerk, and
AUTHORIZE the Public Works Director to arrange for payment o�a $25 fee to Community Development for
processing and a $50 fee to the County Clerk for filing the Notice of Detelination.
Continued on Attachment: ® SIGNATURE: ..��
RECOMMENDATION OF COUNTY ADMINISTRATOR ❑ 1RECOMMENDATIO OF BOARD COMMITTEE
APPROVE .❑ OTHER ,
SIGNATURE(S)...` i
ACTION OF BOARD ON
APPROVED AS;RECOM4fNDWQee OTIIER ❑
VV OF SUPERVISORS I hereby certify that this is a true and correct copy of an action
UNANIMOUS(ABSENT /�) taken and entered on the minutes of the Board of Supervisors on
AYES: NOES: the date shown.
ABSENT: ABSTAIN:
LC:vz ATTESTED:
G:`�EngSvcil:NVIRO\BOi20081(7-22-U8)(`EQA Bethel Neg.Dec Add#2.docx
Orig.Div:Public works(Environmental Section) JOHN CULLEN E OF'fH BOARD OF SUPERVISORS
Contact: Leigh Chavez,(313--2366) AND COUNTY DMINISTRATOR
cc: Administrator--Attn.E.Kuevor
Auditor-Controller '
J.Ring,Community Development
Public Works: Constriction—.K.Emigh By Deputy
Design --N. Leary
Environmental—L.Chavez
SUBJECT: APPROVE Addendum #2 to the Bethel Island Bridge Replacement Project Mitigated Negative
Declaration in compliance with the California Environmental Quality Act, Bethel Island area.
(88% Highway Bridge Rehabilitation and Replacement Program Funds and 12% Local Road
Funds) (District V) [CDD-CP# 03-36] Project No.: 0662-6R4043
DATE: July 22, 2008
PAGE: 2 of.2
FISCAL IMPACT:
The estimated project cost is $12 million funded by Highway Bridge Rehabilitation and Replacement Program
Funds (88%) and Local Road Funds (12%).
REASONS FOR RECOMMENDATIONS AND BACKGROUND:
The Bethel Island Bridge Replacement Project Mitigated Negative Declaration (MND) and Addendum #1 to the
MND evaluated the proposed project which consists of replacement of an existing aging wooden bridge with a
new concrete structure according to current design standards. As a result of the complexity of the bridge
replacement project design and construction logistics, several minor technical changes to the project have been
determined to be necessary during detailed project design.
These minor technical changes include: installation of temporary and permanent steel sheet piling at the
northern abutment, removal of portions of the existing northern abutment, and armoring the face of the new
northern abutment and footing with rock slope protection. Work on the southern abutment will require
placement of rock slope protection in a manner different than previously analyzed in MND Addendum #1. In
addition, based on community interest, decorative/safety lighting and pedestrian overlooks will be added to the
bridge design. The previously adopted Mitigated Negative Declaration, Addendum #1 and Addendum #2 are
attached.
CONSEOUENCES OF NEGATIVE ACTION:
Delay in approving the addendum will result in a delay of the Department's ability to move forward with
construction and may jeopardize funding.
ADDENDUM #2 to the
MITIGATED NEGATIVE DECLARATION
for the Bethel Island Bridge Replacement Project
SCH# 2003082087
Project# 0662-6R4043
CP# 03-36
PREFACE
The Bethel Island Bridge Replacement Project Mitigated Negative Declaration
(MND)evaluated the proposed project which consists of replacement of the'existing aging
wooden bridge with a new concrete structure according to current design standards. The
project consists of constructing a new approximately 860-foot long, 50-foot wide bridge with
two 12-foot lanes, a 12-foot left turn lane at the south end,two 5-foot shoulders,two:5-foot
sidewalks and barrier railings. Based on the increased length of the bridge, the, project
also includes constructing a raised access road between the bridge approach and the
levee on the southeast side of the bridge.
The Contra Costa Community Development Department(CDD)is the Lead Agency
for the project. On November 5, 2003, the Board of Supervisors (Board) approved. the
project and filed a Notice of Determination (NOD)with the County Clerk. On February 15,
2006 an Addendum to the MND was approved by the Board'and an NOD was filed with the
County Clerk.
This document serves as a 2nd Addendum to the Bethel Island Bridge
Replacement Project Mitigated Negative Declaration (CP#' 03-36; SCH# 2003082087).
The MND for the project consists of the original MND (dated July 1, 2003 and filed on
November 5, 2003), the first MND Addendum (dated February 14,, 2006 and filed on
February 15, 2006) and this Addendum.
CEQA PROCESS
The California Environmental Quality Act- (CEQA) stipulates that an Addendum
(CEQA Guidelines Section 15164) to a previously adopted MND may be prepared if only
minor technical changes are necessary and none of the conditions described in CEQA
Guidelines Section,15162 have occurred:
1. No substantial changesare proposed in the project which will require
major revisions of the previous MND due to 'the involvement of new
significant environmental effects or a substantial increase in the severity of
previously identified significant effects;
G:\EngSvc\ENVIRO\TransEng\BetheI Island Bridge\CEQA\Neg Dec Addendum#2.doc .
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ADDITIONSJO THE MND
This section identifies the language which is added and/or changed (bold face type) or
deleted (EAFikeewt) to the text and figures of the MND and/or Addendum #1 to the MND.
The environmental impacts are discussed in "Environmental Initial Study: Bethel Island
Bridge Replacement:Project, dated July 1, 2003 (attached)and filed on November 5, 2003
as well as the 1St Addendum to the MND dated February 14, 2006 and filed on February
15, 2006. The changes.below pertain to the document,referenced above..
1. Installation'of Bridge.Lighting and Pedestrian Overlooks.
Page 8 2"d Paragraph.(Aesthetics): The Bethel Island BFidgp Rep'OGement D'miont, iill
,
This safety ghtOF;g will net GFeate a GigRifiGant 6GuF Onf lig! Lighting will be
installed along the length of the bridge and on the bridge'.approach roads.
Twenty six street lights will be installed on the bridge. The proposal for lighting
on the bridge received strong community.support at Bethel11sland Town Hall
Meetings. While.the lights will provide.for pedestrian-and,motorist safety, they
will also. be decorative and.will enhance the aesthetics of the bridge. The lights
will be consistent.with the style of lighting already installed at the nearby Bethel
Park and 500 unit development. The.bridge is located in an area that is.largely
commercial.in nature; therefore] the lights will not create a significant source of
nighttime glare. The lights have been annexed into County.Service Area L-100 for
operation and maintenance. ,In addition to decorative. lighting,the bridge design
will also include pedestrian overlooks. The overlooks will be located atmidspan
of the bridge and will be constructed by flaring out the sidewalks-from 5' to 10' in
width, The .overlooks will provide. an opportunity for pedesttlians to view the
Bethel Island/Dutch Slough area from the bridge in:a location that is isolated from
vehicular traffic. The,addition of the overlooks to the bridge design will not
modify the appearance of the bridge significantly.
2. Installation, of Temporary Work Trestle Pilings
Page 14, 2"d Paragraph (Biological Resources): Between approximately 75 and.100
temporary piles will be driven in. Dutch Slough in order to create a work trestle
that will allow construction of a work platform from which portions of the new
bridge will be constructed. These temporary piles are strong, but have very
limited volume based on their shape (either H-beam or hollow pipe shells).
Based on their very limited volume, the temporary piles displace very.small
amounts of bed material as they are driven and, therefore, sedimentation is very
G:IEngSvcIENVIRO\TransEnglBethel Island Bridge\CEQA\Neg Dec Addendum#2.doc
3
Page 23, 3`d Paragraph (Hydrology and Water Quality): In order to allow for
construction of the new northern abutment, temporary sheet piles.will be driven
into the:slough in three stages (as the work on the abutment progresses).`The
sheet piles will isolate the work area from the slough zone and allow the area to
.be dewatered to create a"dry work area for.abutment construction. The sheet
piles that will be installed are narrow plates of steel that will be driven by press-in
method, which creates less vibration and pounding than traditional pile driving.
The sheet piles are shallow in depth and will be installed over a short distance.
Based on the shallow depth, short installation distance,and low vibration press-
in method, impacts associated with the sheet pile driving are expected to be
negligible: .The sheet piles will be removed by burning them off at the mudline.
Because work on the northern abutment will `occur over two construction
seasons, there-is the.potential for a sizeable storm occurring during thewinter
.months between the construction seasons. The sheet piling will provide 1:00 year
flood protection of the northern levee throughout the entire construction.period.
Any turbidity.; generated as. a result of the sheet piling installation will be
monitored in.accordance.With existing permit limitations. No new water quality
impacts are expected as a result of this sheet piling installation.
1: Existing Abutment Work
Page 1.4, 2nd Paragraph,(Biology): At the northern end of the bridge,the existing
northern abutment will be removed and the.footing for the new abutment will be.
excavated.. Twenty 14" diameter. piles will r be driven to depth and then a
reinforced concrete footing;will be installed over the piles. Once the footing has
been installed, the concrete..abutment will be poured above the footing. All of
this work will occur entirely within the dewatered area behind the sheet pile
cofferdam wall and will therefore have a negligible impact on biological
resources. Prior to dismantling of the dewatering system,the concrete abutment
will.either be allowed to cure fora full 30 days or a concrete sealant will.be used
to coat the.abutment. These measures will ensure no. deleterious effects to
biological resources occur due to uncured concrete coming in contact.with the
slough waters..
Page 23, 4th Paragraph (Hydr'ology and Water;Quality): At the northern end of the
bridge the existing northern abutment will be removed and the footing for the
new abutment,will.be excavated: All of this work will occur entirely within.the
dewatered area behind the sheet pile cofferdam wall.and will therefore have no
impact on the water quality of the slough. The concrete abutment will either be
allowed to cure for a full 30;days or a concrete sealant will be. used to coat the
abutment before-the dewatering systern is'.dismantled.. These measures will
ensure no deleterious.effects, to water quality occur due.to contact of uncured
G:\EngSvc\ENVIRO\TransEng\Bethel Island Bridge\CEQA\Neg Dec Addendum#2.d6c
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backhoe or similar piece! of equipment to ensure water quality impacts are
negligible. A floating silt curtain (weighted at the'bottom).will be installed around
the rock placement zone to ensure any fines released by placement of.the rock
will settle in the work zone'rather than'spreading4hrough the slough. As with all
other in-water work activities, turbidity will be monitored in accordance with
existing permit conditions. In order to mitigate-for the.0.015 acre. of fill at the
southern due to the placement of riprap below the mean high tide line of Dutch
Slough,the County will purchase mitigation credits at the North Suisun Mitigation
Bank (the U.S. Army.Corps of Engineers has already agreed to the purchase of
credits at this'mitigation bank for impacts due to the project on U.S.Army Corps
of Engineers jurisdiction).
G:IEngSvc\ENVIRO\TransEng\Bethel Island Bridge\CEQA\Neg Dec Addendum#2.dac
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more significant effects not previously discussed in the MND.
f. None .of 'the conditions calling for the preparation of a subsequent or
supplemental EIR have occurred (see items 1 c - e above). Therefore, it is
appropriate to adopt;this Addendum to the MND to make the minor technical
changes and additions discussed in this document (CEQA Guidelines 15164).
This Addendum shall be considered along with the MND and Addendum #1
prior to the Board making a decision on the minor technical changes or
additions. to the project, and in considering these changes or additions, the
Board is considering the identical or substantially similar underlying project.
The findings are supported by substantial evidence in the administrative record and are
based on the MND for the Bethel Island Bridge Replacement Project,which was subject to
public review.
In accordance with CEQA Guidelines Section 15164(d),:the County Board of Supervisors
shall consider this Addendum along with the MND (including Addendum #1) prior to
making a decision on the project. According to CEQA Guidelines Section 15164(c) an
Addendum does not require circulation for public review but can be included in or attached
to the MND. As noted in the Preface, this Addendum is attached to the MND for the
Bethel Island Bridge Replacement Project (CP# 03-36; SCH# 2003082087).
LC:
G:\EngSvc\ENVIRCi\TransEng\Beth.el.island Bridge\CEQA\Neg Dec Addendum#2.doc
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CALIFORNIA ENVIRONMENTAL QUALITY ACT
NOTICE OF DETERMINATION
CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT
651 PINE STREET 4TH FLOOR NORTH WING MARTINEZ, CALIFORNIA 94553-0095
Telephone: (925)313-2366 Contact Person: Leigh Chavez, Environmental Analyst III
Project Description, Common Name (if any) and Location: Bethel Island Bridge Replacement Project. County File #
CP 03-36. The project consists of replacement of the existing aging wooden bridge with a new concrete structure
according to current design standards. The project includes constructing a new approximately 860-foot long, 50-foot wide
bridge with two 12-foot lanes, a 12-foot left turn lane at the south end, two 5-foot shoulders, two 5-foot sidewalks and
barrier railings. Based on the increased length of the bridge, the project also includes constructing a raised access road
between the bridge approach and the levee on the southeast side of the bridge. As a result of the complexity of the
bridge replacement project design and construction logistics, several minor technical changes to the project analyzed by
the Mitigated Negative Declaration filed on November 5, 2003 and Addendum #1 to the Mitigated Negative Declaration
filed on February 15, 2006 have been determined to be necessary during detailed project design. These minor technical
changes include: installation of temporary and permanent steel sheet piling at the northern abutment, removal of portions
of the. existing northern abutment, and armoring the face of the new northern abutment and footing with rock slope
protection. Work on the southern abutment will require placement of rock slope protection differently than previously
analyzed in MND Addendum #1, as well. In addition, based on community interest, decorative/safety lighting and
pedestrian overlooks will be added to the bridge design.
Pursuant to the provisions of the California Environmental Quality Act:
❑ An Environmental Impact Report was prepared and certified (SCH# )
❑ The Project was encompassed by an Environmental Impact Report previously prepared for (SCH#).
® A 2nd Addendum to the Mitigated Negative Declaration was prepared on May 19, 2008.
Copies of the record of project approval and the Negative Declaration or the final EIR may be examined at the office of the
Contra Costa County Public Works Department.
® The Project will not have a significant environmental effect.
❑ The Project will have a significant environmental effect.
® Mitigation measures were made a condition of approval of the project.
❑ A statement of overriding considerations was adopted.
❑ Findings were adopted pursuant to Section 15091 of the State CEQA Guidelines.
Date: 'By:
Community Development Department Representative
AFFIDAVIT OF FILING AND POSTING
I declare that on I received and postedthis notice as required by California
Public Resources Code"Section 21152(c). Said notice will remain posted for 30 days from the filing date.
Signature Title
Applicant: Department of Fish and Game Fees Due: Total Due: $
Public Works Department X Neg.Dec-$1,876.75 Total Paid $
255 Glacier Drive
Martinez,CA 94553 X County Clerk-$50 Receipt#:
Community Development Dept.-$25
Attn: Leigh Chavez
G:\GrpData\EngSvc\ENVIRO\TransEng\Bethel Island Bridge\CEQA\Addendum 42 NOD.doc
,X
CALIFORNIA;.ENVIRONMENTAL QUALITY ACT
NOTICE OF DETERMINATION
CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT
651 PINE STREET 4TH FLOOR NORTH WING MARTINEZ, CALIFORNIA 94553-0095
Telephone: (925)313-2366 Contact Person: Leigh Chavez, Environmental Analyst III
Project Description, Common Name (if any) and Location: Bethel Island Bridge Replacement Project. County File #
CP 03-36. The project consists of replacement of the existing aging wooden bridge with a new concrete structure
according to current design standards. The project includes constructing a new approximately 860-foot long, 50-foot wide
bridge with two 12-foot lanes, a 12-foot left turn lane at the south end, two 5-foot shoulders, two 5-foot sidewalks and
barrier railings. Based on the increased length of the bridge, the project also includes constructing a raised access road
between the bridge approach and the levee :on the southeast side of the bridge. As a result of the complexity of the
bridge replacement project design and construction logistics, several minor technical changes to the project analyzed by
the Mitigated Negative Declaration filed on November 5, 2003 and Addendum #1 to the Mitigated Negative Declaration
filed on February 15, 2006 have been determined to be necessary during detailed project design. These minor technical
changes include:.installation of temporary and permanent steel sheet piling at the northern abutment, removal of portions
of the existing northern abutment, and armoring the face of the new northern abutment and footing with rock slope
protection. Work on the southern abutment:will require placement of rock slope protection differently than previously
analyzed in MND Addendum #1, as well. In addition, based on community interest, decorative/safety lighting and
pedestrian overlooks will be added to the bridge design.
Pursuant to the provisions of the California Environmental Quality Act:
❑ An Environmental Impact Report was prepared and certified (SCH# )
❑ The Project was encompassed by an Environmental Impact Report previously prepared for (SCH#).
® A 2nd Addendum to the Mitigated Negative Declaration was prepared on May 19, 2008.
Copies of the record of project approval and the.Negative Declaration or the final EIR may be examined at the office of the
Contra Costa County Public Works Department.
® The Project will not have a significant environmental effect.
❑ The Project will have a significant environmental effect.
® Mitigation measures were made a condition of approval of the project.
❑ A statement of overriding considerations was adopted.
❑ Findings were adopted pursuant to Section 15091 of the State CEQA Guidelines.
Date: By:
Community Development Department Representative
AFFIDAVIT OF FILING AND POSTING
I declare that on I received and posted this notice as required by California
Public Resources Code Section 21152(c). Said notice will remain posted for 30 days from the filing date.
Signature Title
Applicant: Department of Fish and Game Fees Due: Total Due: $
Public Works Department X Neg Dec-$1,876.75 Total Paid $
255 Glacier Drive
Martinez, CA 94553 X County Clerk-$50 Receipt#:
Community Development Dept.-$25
Attn: Leigh Chavez
G:\GrpData\EngSvc\ENVIRO\TransEng\Bethel Island Bridge\CEQA\Addendum 92 NOD.doc
CALIFORNIA ENVIRONMENTAL QUALITY ACT
NOTICE .OF DETERMINATION
CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMENT
651 PINE STREET 4TH FLOOR NORTH WING MARTINEZ, CALIFORNIA 94553-0095
Telephone: (925)313-2296 Contact Person: Cece Sellgren, Environmental Planner
Project Description,Common Name(if any)and Location:Bethel Island Bridge Replacement Project. County File#CP
03-36. The project consists of replacement of the existing aging wooden bridge with a new concrete structure according to
current design standards. The project includes constructing a new approximately 860-foot long,50-foot wide bridge with two
12-foot lanes,a 12-foot left turn lane at the south end,two 5-foot shoulders,two 5-foot sidewalks and barrier railings. Based on
the increased length of the bridge,the project also includes constructing a raised access road between the bridge approach
and the levee on the southeast side of the bridge. As a result of the complexity of the bridge replacement project design and
construction logistics, several minor technical changes to the project analyzed by the Mitigated Negative Declaration filed on
November 5, 2003 have been determined to be:necessary during detailed project design. These minor technical changes
include: two minor road detours, several utility relocations, minor drainage improvements, and replacement of the planned
mechanically stabilized earth (MSE) wall with a new embankment slope. These minor technical changes will require real
property transactions beyond those discussed within the November 2003 document.
Pursuant to the provisions of the California Environmental Quality Act:
❑ An Environmental Impact Report was prepared and certified(SCH# )
❑ The Project was encompassed by an Environmental Impact Report previously prepared for (SCH# ).
An Addendum to the Mitigated Negative Declaration was prepared on December 22,2005.
Copies of the record of project approval and the Negative Declaration or the final EIR may be examined at the office of the
Contra Costa County Public Works Department.
_J The Project will not have a significant environmental effect.
❑ The Project will have a significant environmental effect.
® Mitigation measures were made a condition of approval of the project.
❑ A statement of overriding considerations was adopted.
❑ Findings were adopted pursuant to Section 15091 of the State CEQA Guidelines.
Date: /�/6)fo By:
Community Development Department Representative
AFFIDAVIT OF FILING AND POSTING
I declare that on I received and posted this notice as required by California
Public Resources Code Section 21152(c). Said notice will remain posted for 30 days from the filing date.
Signature Title
Applicant: ® County Clerk-$50
Public Works Department Total Due: $50
255 Glacier DriveF
Total Paid $
Martinez, CA 94553
Attn:Leigh Chavez I L ! I i�� f n Receipt#:
i II I
FEB 15 2006 --
S.L. WEIR; COUNTY CLERK
.OdTTR Cts A C UNTY'41
UTY
r
ADDENDUM to the
MITIGATED NEGATIVE DECLARATION
for the Bethel Island Bridge Replacement Project
SCH# 2003082087
Project # 0662-6R4043.
CP# 03-36
PREFACE
The Bethel. Island Bridge Replacement Project Mitigated Negative Declaration .
(MND)evaluated the proposed project which consists of replacement of the existing -a'
wooden bridge with a new concrete structure according to current design standards. The
project consists of constructing a new approximately 860-foot long, 50-foot wide bridge with
two 12-foot lanes, a 12-foot left turn lane at the south end, two 5-foot shoulders, two 5-foot
sidewalks and barrier railings. Based on the increased length of the bridge, the project
also includes constructing a raised access road between the bridge approach �ar d the
levee on the southeast side of the bridge.
This document`serves as-an Addendum to the Bethel Island Bridge Replacement
Project Mitigated Negative Declaration (CP#03-36; SCH#2003082087). The MND forthe
project consists of the original MND (dated July 1, 2003 and filed on November 5, 2003),
and this Addendum. .
The Contra Costa Community Development Department(CDD)is the Lead Agency
for the project, and on November 5, 2003,the Board of Supervisors (Board) approved the
project and filed a Notice of Determination (NOD) with the County Clerk.
CEQA PROCESS
The California Environmental Quality Act (CEQA) stipulates that an Addendum
(CEQA Guidelines Section 15164) to a previously adopted MND.may be prepared if only
minor technical changes are necessary and none of the.conditions described in CEQA
Guidelines Section 15.162 have occurred:
1. No substantial changes are proposed in the project which will require
major revisions of the previous MND due to. the involvement of new
significant environmental effects or a substantial increase in the severity of
previously identified significant effects;
2. No substantial changes with respect to the circumstances under which
the project is undertaken which require major revisions of MND due to the
involvement of new significant effects or a.substantial increase in the severity
of previously identified significant effects; or
G:\GrpData\EngSvc\ENVIRO\TransEng\Bethel Island Bridge\Neg Dec Addendum.doc
1
ADDITIONS TO THE MNb
This section identifies the language which is added and%or changed (bold face type) or
deleted (strikeew to the text.and figures of the MND. :The environmental. impacts are
discussed in "Environmental Initial Study: Bethel Island Bridge Replacement Project,dated
July 1, 2003 (attached)and filed on November 5, 2003. The changes below pertain to the
document referenced above.
1. Road Detours
Page 1, end of the 2nd Paragraph (Project Descri Ai on): In order to accommodate
local traffic during construction of the permanent Bethel Island Road ,—.Wells
Road intersection,.a temporary Wells Road detour will be constructed to allow
traffic to travel `around th'e roadwork. The Wells Road. detour will be
approximately 1,000 feet long and 20 feef.Mide and will be' paved to ensure
adequate access. The detour will be located on APN 032-112=004, but it will be
constructed as close.to the-intersection of Wells Road and Bethel Island Road as
possible to minimize. the detour road's footprint on the'underlying parcel" This
temporary Wells Road detour will be removed pHor to completion of,the project
and the underlying area will be returned to its original condition (level grassland).
In addition to the Wells Road detour, in order to accommodate traffic on Bethel
Island Road while the southern bridge abutment is being constructed, a
temporary detour road will also be constructed.along the west side of Bethel
Island Road. The temporary Bethel Island Road detour will be 26 feet wide and
850 feet long and will be paved. The detour roadwill .be constructed on APNs
032-330-010, 032-330-027 and 032-130-022: The detour road will be constructed
immediately adjacent .to Bethel Island Road to minimize the detour road's
footprint on the underlying parcels. Similar to the Wells Road detour, this
temporary detour road wilFbe removed prior to project.completion and the area
not encumbered by permanent slope easements will be returned to its original
condition:
Real Propertytransactions will be necessary to allow for constructionof both
detour roads; however, both of these detour roads will be located on parcels that
were already expected to require some level of property acquisition in support of
the project. Real property,transactions on these parcels were discussed in the
MND filed in November of 2003. 'No new significant impacts will result from
construction of the two temporary detour roads.
2. Utility Relocations
Page 34, end of the 1 st Paragraph (Utilities and Service Systems): In order to clear the
work zone to allow for construction of the new bridge, overhead electric lines
G:\Grppata\EngSvc\ENVIRO\TransEng\Bethel Island Bridge\Neg Dec Addendum.doc
3
1 r _
Real Property transactions may be necessary in support of the drainage inlet
work along Riverview Place.. No new significant impacts will occur as a result of
the Riverview Place drainage inlet work.
4. Embankment Slope
Page 1 end of 2nd Paragraph Project Description): The extended leR9th of the bridge
a169 require GGR6tFWGtiGR ef a wall vaFY;Rg iR heightfrem -0 1.1- 25 feet fGF Feughl.Y
I�eeal:feet 61ORg the cn„+hweSt rnrnor of the PKr eGt site. The extended length of the
bridge will also require construction of a 2:1 embankment fill slope along the
southwest corner of the site matching the slope design on the east side of Bethel
Island Road. Permanent real property acquisitions will be necessary in support
of this work.
Page 7, 3rd. Paragraph .(Aesthetics): The-e)d6T q d,IRR -e# e- ridg6.4li rnn„ir
:.
feet f9F
Will " . i;i at rIy 25t . feet �t-tththe�B ufhefR—levec and_. epidR
v—i�
+ the 3.) balsW en the'duFFOnt 16446m pf '
he �.AeAv 4i wall will
,.
the w6li tapei�#ewn will vieWthe wall at a height varying, h-.6 th A F 69 ee 6
+.
,
that FesidenrOe'S GUFFeRtvaeW GGR666tS of the baGk 9f a.tall ,
The
extended length of the ' bridge will 'require construction of an earthen
embankmentat a 2,:1 slope on the southwest corner of the project site. This
embankment slope solution is a simpler and less expensive approach than.the
mechanically stabilized earthen wall originally planned for this location. In
addition,the earthen embankment will match the design on the southeast side of
the roadway, making it amore uniform solution than the MSE wall originally
proposed and analyzed in 'thte November 2003 MND. The embankment will start
approximately 250 feet south of the southern levee and extend toapproximately
700 feet south of the levee. The embankment is not expected to have a
significant aesthetic impact based on a number of factors, including: 1) the
embankment will be a gently sloping earthen berm covered in hydroseeded
grasses, 2) the embankment will be located adjacent to two businesses (rather
than residences), 3) the business located at the tallest point of the embankment
does not have any windows facing the roadway, 4) based on the current location
of boat storage, the view of the embankment will be partially covered by
stationaryboats.
G:\GrpData\EngSvc\ENVIRO\TransEng\Bethel Island Bridge\Neg Dec Addendum.doc
5
1
CONTRA COSTA COUNTY ADDENDUM FINDINGS for the
MITIGATED NEGATIVE DECLARATION for
BETHEL ISLAND BRIDGE REPLACEMENT PROJECT .
The following information is added to the previous MND and is presented to comply with
Section 15091 of the CEQA Guidelines for the MND for the Bethel Island Bridge
Replacement Project
1. Environmental Effect: Modifications to the design section as described in this
Addendum, are minor technical changes or additions to the project and will not
result in any additional environmental effects not previously discussed.
Findings: There.are no significant environmental impacts associated.with the
minor-technical .changes or additions for the proposed activity for,which this
Addendum was prepared.
Statement of Facts:
a. The project to be developed pursuant to this Addendum to the MND for the
Bethel Island Bridge Replacement Project is substantially similar to the project
analyzed in the MND.
b. The MND for the Bethel Island Bridge Replacement Project consists of the MND,
comments received, responses to the comments raised, and this Addendum. The
MND was completed in compliance with CEQA.
c. There are no substantial changes, pursuant to.CEQA Guidelines Section 15162
(a)(1), in the project that require major revisions of the MND due to the involvement
of new significant environmental effects or a substantial increase in the severity of
previously identified significant effects. The project is substantially similar to the
project analyzed in the MND.,
d. There are no substantial changes with respect to the circumstances, pursuant to
CEQA Guidelines Section 15162 (a)(2), under which the Bethel Island Bridge
Replacement Project is undertaken which require major revisions of the previous
MND due to the involvement of new significant environmental effects or a
substantial increase in the severity of previously identified significant effects. Those
circumstances remain substantially similar to the circumstances analyzed in the
MND.
e. There is no new information of substantial importance, pursuant to CEQA
Guidelines Section 1.5162 (a)(3), which shows that the project will have one or
more.significant effects not previously discussed in the MND.
G:\GrpData\EngSvc\ENVIRO\TransEng\Bethel Island Bridge\Neg Dec Addendum.doc.
7
CONTRA PUBLIC WORKS DEPARTMENT-
COSTA INITIAL STUDY
COUNTY OF ENVIRONMENTAL SIGNIFICANCE
PROJECT # 0662-6R4043
CP# 03-36
PROJECT NAME` Bethel Island Bridge Replacement Project
PREPARED BY: Leigh Chavez DATE: July 1, 2003
APPROVED BY: ' DATE: $'- - 0 5 .
RECOMMENDATIONS:
() Categorical Exemption (Class ) ( ) Negative Declaration
( ) Environment Impact Report Required ( X ) Mitigated Negative Declaration
The project will not have a significant effect on the environment. The recommendation is
based on the following: There is no substantial evidence that the project or any of its aspects may
cause a significant effect on the environment (Sec. 15063(b)(2)).
What changes to the project would mitigate the identified impacts: N/A
USGS Quad Sheet: Jersey Island Base Map Sheet#: F27 Parcel # N/A
GENERAL CONSIDERATIONS:
1. Project Description: The Contra Costa County Public Works Department is proposing to
replace the Bethel Island Bridge, located in the east Contra Costa County area (Figures 1,
2). The bridge has been categorized as "functionally obsolete" by Caltrans and the.
replacement has been determined to be necessary in order to replace the aging wooden
structure with a new concrete structure according to current design standards. The existing
bridge, built in 1948, is 460 feet long and 28 feet wide. It consists of a concrete deck over a
wooden substructure containing 25 bents. The bridge currently has two 11-foot lanes, two
narrow sidewalks, and no shoulder area.
The project consists of constructing a new approximately 800-foot long, 50-foot wide bridge
with two 12-foot lanes, a 12-foot left turn lane at the south end, two 5-foot shoulders, two 5-
foot sidewalks, barrier railings and a pedestrian staircase. Based on the increased length of
the bridge, the project also includes constructing a raised access road between the bridge
approach and the levee on the south side for general and emergency access. The extended
length of the bridge will also require construction'of a wall varying in height from 2 to 25 feet
for roughly 450 linear feet along the southwest corner of the project site.
Support piles for the new bridge will be installed within the slough, beyond the south levee,
and in the north levee. Although design of the replacement bridge requires that the new.
bridge be longer and wider to accommodate current design standards, the bridge has been
designed specifically to avoid major impact to the downtown Bethel Island community by
locating the new bridge in essentially the same location as the old bridge. Figure 3 delineates
r.-.,C tr.t,- cc E of
CALIFORI ENVIRONMENTAL OUAL17 . ACT
NOTICE OF DETERMINATION 7 JAN. 12 )oDu 4.
CONTRA COSTA COUNTY COMMUNITY DEVELOPMENT DEPARTMEN- '::�., �:.,;..: .;
651 PINE STREET 4TH FLOOR NORTH WING MARTINEZ, CALIFORNIA 94BS3-•_00:.5 . , •L
Telephone: (925) 313-2296 Contact Person:. 'Cece Sellgren, Environmental Planner
Project Description, Common Name (if any)and Location: Bethel Island Bridge Replacement Project, County.File#CP 03-36. Project
Description.: The Contra Costa County Public Works Department is proposing to replace the Bethel Island Bridge, located in the east Contra
Costa County area. The bridge has been categorized as"functionally obsolete"by Caltrans and the replacement has been determined to be
necessary in order to replace the aging wooden structure with a new concrete.structure according to current design standards._The project
consists of constructing a new approximately 800-foot long,50-foot wide bridge•with two 12-foot lanes,a 12-foot left turn lane at the south end,
two 5-foot shoulders,two 5-foot sidewalks,barrier railings..and a pedestrian staircase. The project also includes constructing a raised access
road between the bridge approach and the levee on the south side for general and emergency access. The extended length of the bridge will
also require construction of a wall varying in height from 2 to 25 feet for roughly 450 linear feet along the southwest corner of the.project site.
Support piles for the new bridge will be installed within the,slough, beyond the south levee,and in the north levee. Although design of.the
replacement bridge requires that the new bridge be longer and wider to accommodate current design standards,the bridge has been designed
specifically to avoid major impact to the downtown Bethel Island community by locating the new bridge in essentially the same location as the
old bridge. Construction of the bridge will occur over two construction seasons. The eastern half of the bridge will be constructed during the 151
construction season and the western half of the bridge will be constructed during the 2"d season. In order to ensure adequate emergency
access during construction, the bridge engineer has designed the construction phasing to accommodate one lane open in each direction
continually during construction.In order to construct the new bridge,property acquisition is required including partial parcel acquisition,slope
easements,and temporary construction easements in the vicinity of the project. Relocation of residential and business occupants may also be
required. The project may also require conforming and/or relocation of several driveways,Several boat slips on the northeast side of the bridge
may be located outside of the road right of way in an area necessary for bridge construction. If the slips are impacted by the project,the County
will relocate the boats and offer to rent the spaces from the slip rental business. Real Property transactions necessary to construct the
replacement bridge may affect a number of parcels including: APN 031-091-011,APN 031-093-034,APN 031-093-027,APN 031-093-028,
APN 031-093-018,APN 031-093-025,APN 031-093-026,APN 031-093-035,APN 032-140-015,APN 032-140-012,APN 032-330-010, and
APN 032-112-004. Driveway conforms may be necessary on APN 032-130-022, APN 032-330-027 and APN 032-330-010. In addition,
following completion of the project,further real property transfers,such as dispensation of surplus property,may occur. Project Location: The
project is located along Bethel Island Road over Dutch Slough in the east Contra Costa County area. Bethel Island Road is the only access to
Bethel Island.
The project was approved on:
Pursuant to the provisions of the California Environmental Quality Act:
( ) An Environmental Impact Report was prepared and certified (SCH# )
( ) The Project was encompassed by an Environmental Impact Report previously prepared
for (SCH# ).
( X ) A Mitigated Negative Declaration was prepared following identification.of a potentially significant impact
Copies of the record of project approval and the Negative Declaration or the final EIR may be examined at the office of the Contra Costa
County Community Development Department..
( X ) The Project will not have a significant environmental effect with incorporated.mitigatsu
( ) The Project will have a significant environmental effect. I'. I
( ) Mitigation measures were made a condition of approval of the project: ( � I
( ) A statement of overriding considerations was adopted.
( ) Findings were adopted pursuant to Section 15091 of the State CEQA Guidelines.
I I FJ
IL
Date: By: iC---•—may
Community Development Department Representative
c S.L.-WEIR, CGU14 CLERK .
AFFIDAVIT OF FILING AND POSTING t A C � I�lT
NOV 5 2003 ` - 1 BY PUTY
I declare that on I received and posted this no ice
California Public Res urces Code Section 21.152(c). Said notice will remain posted for 30 days from the filing
DEPUTY COUNTY' CLERK
Signature Title
Applicant:
Public Works Department Department of Fish and Game Fees Due: Total Due: $
255 Glacier Drive X Neg Dec-$1,250 Total Paid $
Martinez,CA 94553
Attn:Leigh Chavez X County Clerk-$50 Receipt#:
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