HomeMy WebLinkAbout20 - Collins Island Bridge Replacement — Adoption of Mitigated Negative Declaration and Intent to Prepare Final Construction Documents (22R13) - PowerPointCOLLINS ISLAND BRIDGE
REPLACEMENT
RECOMMENDATIONS
ADOPT MITIGATED NEGATIVE DECLARATION
AND
PROCEED WITH FINAL BRIDGE DESIGN
Collins Island is private.
The existing bridge was built in
1953 as a private improvement
project.
The City took over ownership of
the bridge in 1959.
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CITY OF
NEWPORT BEACH
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CITY OF
NEWPORT BEACH
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CITY OF
NEWPORT BEACH
➢ Existing bridge abutments are constructed with concrete sheet piles.
➢ Caltrans inspection evaluated the bridge structure as "minimum
tolerable".
➢ Top of bridge coping is Elevation 9.0'.
➢ Seawall at 1 Collins Avenue is at Elevation 10.9'.
➢ Note the open railing on the bridge.
PRUPDSE�SEAWALL
IMPROVEMENTS
ALLEY
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{ll PRDPDSEl1 RRIl1GE � � • +
{ APPROACHES r
till l COLLINS IStAfVD STREET, SIDEWALK AnD
1 BALBOA ISLAND
LANDSCAPE IMPROVEMENTS K awe
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FUTURE PUMPSIATION
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PROPOSED Ealu} -- - -
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Af. PY
P R OPOSE O S EAWAL L 1
IMPROVEMENTS
➢ Bridge and bridge approaches
➢ Seawall improvements
➢ Street, sidewalk and landscape improvements
➢ Provisions for future stormwater pump station
CITY OF
NEWPORT BEACH
Bridge Elements Proposed Existing
-Bridge Span
31'-0"
207
-Bridge Width
20'-6"
197
-Travel Lane Width
133-3"
127
-Sidewalk Width
4'-6"
4'
-Bridge Deck Elev.
7.52'
7.247
-Side Barrier Top Elev.
11.00'
Open
Railing
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CITY OF
NEWPORT BEACH
�I,l
.31-_ 11
IKE PARK
AVENUE
-2" POLfE!�TE:
'J CONCRETE
I OVERLAY
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Proposed Typical Section
Typ
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Exist COPING, Typ
`
NEW STEEL SHEET PILE
]_ SHEET PILE
Exlst CONCRETE
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SHEET PILE, Typ
2
19•-2"l OPENING
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4 _
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Conc BARRIER
TYPE 7325W (MOD) of
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P
PAR AVENUE
11 N53' •59"W
El- 7.702 .1
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<=TO COLLINS ISLANp
EB I t+23.87 I
Elev 42
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➢ Existing 20' bridge deck is removed.
➢ New sheet piles are constructed outside the
existing concrete sheet piles (that form the
bridge abutments). Bottom end of pile: -31 feet.
➢ Four new piles are driven that will support the
new 31' bridge deck.
C— BARRIER
J TYPE 842 (MDD)
Exist COPING, Typ MEASURED ALONG $ PARK AVENUE
_ BB EB Conr STEM WALL TO
Exist CONCRETE NEW Conc COPING, Typ E>a:=- �161:, Typ Conc BARRIER TYPE 542 (MOD} ACCCMMODA7E SEA LEVEL R15E
SHEET PILE, Typ
Exiat TOP NEW Canc COPING, Typ
I` NEW Conc COPING, Typ j( OF DECH 3" CIP DECK
NE- STEEL SHEET PILE PLAN NEW STEEL
ROADWAY
I SHEET PILE ROADWAY _
HIGH TIDE
PILE CAP, Tyq Conc SLA9 WATER
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rLOW TIDE
24" CIDH �� / WATER Exist Conc
sssJJl Elegy —2.4i I•r r�
SECANT PILE, Typ ��� — �i-.rl SHEET PILE, Typ
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I Exi L ,
SHEET PLE, Typ "—I— SHEET SHEET PCEn Typ NEW STEEL
T1 LJ NEW STEEL 179 r 1—Y--- SHEET PILE, Typ
CITY OF SHEET PILE, Typ
NEWPORT BEACH
nn ELEVATION n1*�
COLLINS ISLAND
Top of Seawall Elevation Requirements
1
11 ' SEAWALL_
(TV BB 10r92 V'
R
3
EXIST. SEhMhLL FRCP 15RIDGE
0.5.0
G' v
NEW SEAWALL
Year Structure
Permitted
Adopted Newport Beach
Standard Elevation (feet)
Designfor Adaptability
Elevation (feet) '
NAVD88
VILLW
NAVD86
VLLW
2020
10.7
10.9
13.7
13.9
2021 -2025
10.9
11.1
14.A
14.6
2026-2030
'11.0
11.1
14.6
14.8
2031- 2035
11.0
112
14.8
1 15.0
Saurce: 2= Newport Beach Waterfront project Guidelines T261e N--. 2
83.48' .ER "+.. 2.7 B3.80'
LIMIT OF SE4WFLL OCfi5TRUCTIUN LIMIT CF SEAWALL OONSTFLCTIO'.
FF.11TE(T Ex]ST SExNALL
rU4' SEAULL r TI y l ib.
(TTP r - I HEN SEANALL
Ff; i➢ EXIST. SEAWALL Ip (TYP )
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it _ FIITI FE 7y
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➢ Top of new seawall would transition to match existing seawall.
➢ Boardwalk would be raised about 1 foot to match new elevation of
roadway approach to bridge.
❑ Staff recommends elevation 10.0' for seawalls adjacent to Boardwalk.
CITY OF
NEWPORT BEACH
BAY ISLAND SEAWALL
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CITY OF
NEWPORT BEACH
Traffic Management Plan
❑Limiting lane closures to avoid peak hours of traffic.
❑Construction flag persons to direct traffic during heavy equipment use.
❑Establishing dedicated truck routes.
❑Identify proposed mainland parking areas for construction workers.
Construction Noise Mitigation Plan
❑Contractor's Noise Disturbance Coordinatorto investigate complaints.
❑Implement construction noise reduction methods including:
• requiring construction equipment be equipped with noise shielding
and muffling devices,
■ shutting off idling equipment,
■ maximizing the distance between construction equipment staging
areas and residential areas, and
■ requiring the use of electric air compressors and similar power
tools.
10
PROJECT MILESTONES
• Drawings and Specifications Completed
• Coastal Development Permit and Other
Permits Issued
• Advertise Project
• Award Project
• Begin Construction
• Complete Construction
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CITY OF
NEWPORT BEACH
DATE
October 2025
March 2026
April 2026
June 2026
September 2026
March 2027
Conceptual Design / Environmental Documents
Final Design /Agency Permitting
Construction (Rough Estimate)
Contingency
Estimated Total Project Cost
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CITY OF
NEWPORT BEACH
$ 3705000
$ 7115000
$2, 500, 000
$ 250,000
$3,831,000
• Adopt Resolution No. 2024-79, A Resolution of the City Council of
the City of Newport Beach, Adopting Mitigated Negative Declaration
No. ND2018-002 for the Collins Island Bridge Replacement
(PA2024-0190), pursuant to the California Environmental Quality
Act, State CEQA Guidelines and City Council Policy K-3; and
• Authorize Michael Baker International to prepare the final
construction documents for the Collins Island Bridge Replacement
including adjacent new seawalls.
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CITY OF
NEWPORT BEACH
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CITY OF
NEWPORT BEACH
CITY OF
NEWPORT BEACH
■ New steel sheet pile (green dots) installed
outside the existing concrete sheet pile (purple).
■ New concrete coping (dark green dots) installed
on top of new steel sheet pile to top elevation
10.9 feet (NAVD88 datum).
■ Existing concrete coping ( )range) removed and
sidewalk widened (black dots).
■ A future stem wall can be added to top elevation
14.4 feet.
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CITY OF
NEWPORT BEACH
7;1P OF FOTURE STDJ WALL
eve 4.40
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L--FUTURE Cann 5TEM WALL
I I IF DEEMED NECESSARY
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I I LEVEL RISE
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TOP aF WALL
pq—t 0, 9Gf
_—NEW Cony
COPING
PROFILE LINE
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Conc SIDEWALK
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SECTION No.2
Eclat fans
SHEET PILE