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Results you can rely on
z
1
Results you can rely on
I-49 North Segment K Project
2
Results you can rely on
AGENDA
3
• PROJECT OVERVIEW
• BRIDGE DESIGN
• ARCHITECTURAL ENHANCEMENTS
• SPECIAL PROVISIONS
• COST ESTIMATE AND FINAL BIDS
• CONSTRUCTION
Results you can rely on
ARKANSAS
SITE LOCATION
4
185 MILES TO
DALLAS, TX
T
E
X
A
S
M
I
S
S
I
S
S
I
P
P
I
PROJECT
SITE
LAFAYETTE BATON
ROUGE
NEW
ORLEANS
Results you can rely on
I-49 NORTH CORRIDOR
5
SEGMENTS A – J
ALL UNDER
CONSTRUCTION
OR COMPLETED
SEGMENT K
Results you can rely on
6
• INTERCHANGE BRIDGE AESTHETICS
• VISUAL QUALITY MANUAL
PRIME CONSULTANT - BRIDGE DESIGN:
• COORDINATION WITH DOTD AND TEAM MEMBERS
• DEVELOPMENT OF DESIGN CRITERIA & QC/QA PLAN
• 5 DESIGN TEAMS
• DESIGN OF ALL STEEL BOX GIRDER BRIDGES
• DESIGN OF RAMP EN (SEGMENTAL) BRIDGE PRIME
CONSULTANT
- ROADWAY
DESIGN. • DESIGN OF RAMPS SE, WN (SEGMENTAL)
• PEER REVIEW OF TRC’S BRIDGE DESIGN.
PROJECT TEAM
• DESIGN OF I-220 BRIDGE WIDENING NTB
Associates,
Inc.
Results you can rely on
PROJECT TIME LINE
• TIMELINE OF EVENTS
7
DATE EVENT
JUN 6, 2006 NTP FOR PRELIMINARY BRIDGE DESIGN
MAY 25, 2007 PROJECT PLACED ON-HOLD
JUL 7, 2011 DOTD, ASBI, TRC – DISCUSS POTENTIAL
IMPLEMENTATION OF SEGMENTAL ALTERNATIVE
JAN 5, 2012
DOTD/TRC STEPS TO MOVE INTO FINAL PLANS
THAT INCLUDE IMPLEMENTATION OF SEGMENTAL
BRIDGE DESIGN
JAN 2, 2013 ADVANCED NTP ISSUED
DEC 6, 2013 PHASE I PS&E SUBMITTAL
FEB 5, 2014 PHASE I LETTING
FEB 14, 2014 PHASE II PS&E SUBMITTAL
APR 30, 2014 PHASE II LETTING
Results you can rely on
CONSTRUCTION PHASES
8
PHASE I • INTERCHANGE ROADWAYS
• I-49 BRIDGE OVER MLK DR. (4-SPAN PPC GIRDER)
PHASE II • RAMP EN, SE & WN BRIDGES
• I-220 AT RUSSELL RD BRIDGE WIDENING
Results you can rely on
BRIDGE DESIGN
9
RAMP BRIDGES • Ramp EN:
• Length = 3,070’
• Width = Varies 42.5’ to
64’
• Curvature = 3,500’ Rad.
• Max. Ht. = 80’ (3rd Level)
• Ramp SE:
• Length = 3,300’
• Width = 35.5’
• Curvature = 840’ Radius
• Max. Ht. = 105’ (4th
Level)
• Ramp WN:
• Length = 700’
• Width = 31.5’
• Curvature = 550’ Radius
• Max. Ht. = 60’
Results you can rely on
BRIDGE DESIGN
10
DUAL DESIGN ALTERNATES • POST-TENSIONED SEGMENTAL CONCRETE
• STEEL TRAPEZOIDAL BOX GIRDERS
Results you can rely on
BRIDGE DESIGN
11
PROJECT SPECIFIC QC/QA PLAN • DEFINE ROLES AND RESPONSIBILITIES
• REQUIRED PROCEDURES FOR THE QC
AND QA PROCESS
• ADHEARANCE TO CAD STANDARDS
• INDEPENDENT PEER REVIEW
STANDARDIZE DESIGN
METHODOLOGY • COMPREHENSIVE DESIGN CRITERIA
• DESIGN DIRECTIVES – SOFTWARE &
DESIGN APPROACH
Results you can rely on
BRIDGE DESIGN
12
SUBSTRUCTURE • SIMILAR FOR EACH ALTERNATE
• MULTI-DRILLED SHAFT (66”Φ) FOOTINGS
• HAMMERHEAD BENTS
• STRADDLE BENTS
• CANTILEVER BENT
HAMMERHEAD
BENT STRADDLE BENT
CANTILEVER
BENT
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
13
DESIGN METHODOLOGY &
CONSTRUCTIBILITY: • PRECAST SEGMENTAL
• BALANCED CANTILEVER ERECTION
• TEMPORARY SHORING
• ERECTION BY CRANES
• OFFSITE CASTING YARD
• ONE SET OF CASTING MACHINES FOR
ALL SEGMENTS
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
14
DESIGN METHODOLOGY & CONSTRUCTIBILITY • 732 SEGMENTS
• TYPICAL SEGMENT LENGTH +/-10’
• SPLIT PIER SEGMENTS
• LINEAR HAUNCH AT PIERS
• TYPICAL SPAN LENGTHS:
• +/-250’ INTERIOR SPANS
• +/-160’ END SPANS
TYPICAL SECTION
ELEVATION
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
15
SEGMENT BOX DESIGN • SAME CORE DIMENSION
• VARYING WING DIMENSION TO ACCOMMODATE DIFFERENT
BRIDGE WIDTH
RAMP EN 50’-11” TO 42’-6”
RAMP SE 35’-6”
RAMP WN 31’-6”
TYPICAL SECTION
BOX 20’-2”
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
16
POST-TENSIONING SYSTEM • CONTINUITY TENDONS
• CANTILEVER TENDONS
• TEMPORARY & PERMANENT PT BARS
• TRANSVERSE TENDONS
CONTINUITY TENDONS
CANTILEVER TENDONS
BALANCED CANTILEVER
ERECTION
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
17
SUPERSTRUCTURE
• PRECAST SEG. CONTINUOUS UNITS ARRANGEMENT
RAMP # OF SPANS LENGTH (FT) DESIGN BY
EN 4 803
EN 5 1070
EN 5 1070
SE 8 1900
SE 6 1400
WN 4 700
GENERAL ELEVATION VIEW OF RAMP EN BRIDGE
127’ 160.5’-241’-241’-160.5’ 164’-246’-250’-246’-164’ 164’-246’-250’-246’-164’ UNIT1 = 803’ UNIT2 = 1070’ UNIT3 = 1070’ SPAN1
Results you can rely on
BRIDGE DESIGN - STEEL ALTERNATE
18
DESIGN METHODOLOGY BRIDGE GEOMETRY SIMILAR TO
THE SEGMENTAL ALTERNATE
TRAPEZOIDAL BOX GIRDERS WITH
STANDARDIZED WEB SLOPE
CONSTANT WEB HEIGHT PER
BRIDGE
SHOP PIECES LIMITED TO 130’ &
170 KIPS
CROSS FRAMES DESIGNED AS
PRIMARY MEMBERS
AASHTO M270 Gr. 50 STEEL
PERMANENT EXTERNAL CROSS
FRAMES
Results you can rely on
BRIDGE DESIGN - STEEL ALTERNATE
19
C L GIRDER 2
C L GIRDER 1 SECTION A-A
EXTERNAL BRACING
INTERNAL
BRACING
C L BRG
BENT 2
TYP. SE FRAMING PLAN C L SPLICE
TOP FLANGE LATERAL
BRACING (TYP)
INTERNAL “K”
BRACING (TYP)
EXTERNAL
BRACING (TYP)
A
A
C L BRG
BENT 1
Results you can rely on
ARCHITECTURAL ENHANCEMENTS
PIER DESIGN • SHAPE AND COLOR
• DECORATIVE PANELS AND RUSTICATION
20
SEGMENTAL ALTERNATIVE STEEL
ALTERNATIVE
Results you can rely on
ARCHITECTURAL ENHANCEMENTS
STRADDLE BENT AND C-BENT
21
STRADDLE BENT C-BENT
Results you can rely on
ARCHITECTURAL ENHANCEMENTS
DECORATIVE PANELS
• ARTWORK SHOWN FOR REFERENCE ONLY
• FINAL ARTWORK TO BE DETERMINED THROUGH
CALL-TO-ARTISTS AND PROVIDED TO THE
CONTRACTOR TO FABRICATE
22
Results you can rely on
ARCHITECTURAL ENHANCEMENTS
LIGHTING
• COMMUNITY INVOLVEMENT
• COLOR CHANGING OPTION
23
Results you can rely on
DESIGN CHALLENGES
24
ARCHITECTURAL ENHANCEMENTS – FROM
CONCEPT TO CONSTRUCTION DOCUMENTS • Agreement between City and State for the Incorporation of
Aesthetics into the Interchange Design
• No Cost / Low Cost Aesthetic Methodology
• Shape
• Color
• Lighting
• Architect Produced – Visual
Quality Manual (VQM) – NOT
Part of the Contract Documents
• Engineer Produced
Bid/Contract Documents
Results you can rely on
DESIGN CHALLENGES
25
ARCHITECTURAL ENHANCEMENTS – FROM
CONCEPT TO CONSTRUCTION DOCUMENTS • PIER SHAPE
• INITIAL SELECTION OF THEME
• DETERMINATION OF DIMENSIONS
Results you can rely on
DESIGN CHALLENGES
26
ARCHITECTURAL ENHANCEMENTS – FROM
CONCEPT TO CONSTRUCTION DOCUMENTS • COLOR
• PLANS IDENTIFIED LOCATIONS AND FEDERAL COLOR
NUMBERS
• SPECIAL SURFACE FINISH FOR CONCRETE
• PAINT COLOR FOR STEEL
Results you can rely on
DESIGN CHALLENGES
27
ARCHITECTURAL ENHANCEMENTS – FROM
CONCEPT TO CONSTRUCTION DOCUMENTS • LIGHTING
• SELECTION OF LIGHTING SYSTEM & LOCATIONS
• PHOTOMETRIC & GLARE ANALYSIS
Results you can rely on
DESIGN CHALLENGES
28
ARCHITECTURAL ENHANCEMENTS – FROM
CONCEPT TO CONSTRUCTION DOCUMENTS
• DECORATIVE PANELS
• CALL TO ARTISTS FOR
SELECTION OF DESIGN
• PLANS SHOW
LOCATIONS &
CONCEPTUAL DETAILS
• SPECIAL PROVISION
INDICATES
QUALIFICATIONS, TYPE,
ETC…
• VECTOR FILE PROVIDED
TO THE CONTRACTOR
Results you can rely on
SPECIAL PROVISIONS
29
• A SIGNIFICANT EFFORT FOR SEGMENTAL
ALTERNATIVE
• REVIEWED OTHER STATE DOT’S SPECIFICATION
AND BEST-PRACTICES
• CONSULTED WITH ASBI & PTI, INCORPORATED
LATEST TECHNOLOGY, SPECIFICATION AND
PUBLICATIONS
• USED NON-STANDARD PAY ITEMS:
• PRECAST SEGMENTAL SUPERSTRUCTURE BY
LN. FOOT
• POST-TENSIONING STEEL BY LBS.
Results you can rely on
COST ESTIMATE AND FINAL BIDS
30
FINAL BID RESULTS-PHASE I • LETTING DATE: 2/5/2014, WINNING BID: $33.2M
RANK BID
ALTERNATIVE BID ESTIMATE
% OVER
ESTIMATE
1 SEGMENTAL $137.8M $135.9M 1.4%
2 SEGMENTAL $143.9M $135.9M 5.9%
3 STEEL $154.2M $129.4M 19.2%
4 SEGMENTAL $159.1M $135.9M 17.1%
FINAL BID RESULTS-PHASE II • LETTING DATE: 4/30/2014
• FINAL BIDS
• TOTAL PROJECT BID COST: $ 17I M
Results you can rely on
CONSTRUCTION
31
SUBMITTALS
• TYPES • RFI’S
• SHOP DRAWINGS:
• SEGMENT DRAWINGS FOR PRECAST SUPERSTRUCTURE (PIER, HAUNCHED, TYPICAL, EXPANSION & CLOSURE)
• DISC BEARING ASSEMBLIES
• EXPANSION JOINTS
• DECK DRAINAGE
• DECORATIVE PANELS
• TEMPORARY WORKS:
• LIFTING BEAMS,
• STRONGBACKS/CLOSURE BEAMS,
• STRESSING/ACCESS PLATFORMS,
• SHORING TOWERS FOR BALANCE CANTILEVER SUPERSTRUCTURE/STRADDLE BENTS/RAMP EN SPAN 1 CIP SPAN,
• FORMWORK FOR HAMMERHEAD, CANTILEVER AND STRADDLE BENTS, RAMP EN SPAN 1 CIP SPAN AND SEGMENTAL SUPERSTRUCTURE CLOSURE
POURS
• CONSTRUCTION ANALYSIS:
• LONGITUDINAL CONSTRUCTION ANALYSIS – CONTRACTOR’S SCHEDULE, MEANS AND METHODS AND SEQUENCE WITH RESULTING COMPUTER
MODELS TO DETERMINE CAMBER
• TRANSVERSE CONSTRUCTION ANALYSIS – CALCULATIONS SUPPORTING CONTRACTOR’S MEANS AND METHODS FOR TEMPORARY WORKS,
JACKING, TIE-DOWNS, ETC…
• POST-TENSIONING:
• POST-TENSIONING SYSTEM DRAWINGS
• POST-TENSIONING LAYOUT DRAWINGS FOR SEGMENTAL SUPERSTRUCTURE, RAMP EN SPAN 1, STRADDLE BENTS
• TENDON ELONGATIONS/STRESSING DATA (LONGITUDINAL AND TRANSVERSE)
• POST-TENSIONING PLAN/MANUAL
• FRICTION AND WOBBLE TEST DATA
• CASTING YARD SUBMITTALS (PER SPECIAL PROVISIONS) – INCLUDES DETAILS OF SEGMENT CASTING FORMS AND CELLS
• GEOMETRY CONTROL:
• CASTING MANUAL (SEE ATTACHED EXCERPT FROM SPECIAL PROVISIONS)
• UNCAMBERED & CAMBERED SEGMENT GEOMETRY
• AS-CAST SEGMENT GEOMETRY AND CORRECTIONS
• AS-ERECTED SEGMENT GEOMETRY AND CORRECTIONS
• ERECTION MANUAL (SEE ATTACHED EXCERPT FROM SPECIAL PROVISIONS)
• FULL SCALE GROUTING MOCK-UP PLAN
• GROUTING OPERATIONS MANUAL/PLAN
• JACKING PLAN FOR FUTURE BEARING REPLACEMENT
• MATERIAL, VENDOR & PERSONNEL QUALIFICATIONS
• ELECTRICAL/LIGHTING: SHOP DRAWINGS, EQUIPMENT SUBMITTALS AND O&M MANUALS
• ETC…
• TRACKING & DOCUMENTATION
Results you can rely on
CONSTRUCTION
32
VALUE ENGINEERING PROPOSALS
• CONTRACTOR PROPOSAL FOR
REPLACEMENT OF 60 KSI
REINFORCEMENT WITH 75 KSI
• RE-GRADING POND AND RAISE
FOOTINGS AT EN & WN
• REPLACE RAMP WN BRIDGE WITH
FILL
Results you can rely on
CONSTRUCTION
33
Results you can rely on
CONSTRUCTION
34
Results you can rely on
CONSTRUCTION
35
Results you can rely on
CONSTRUCTION
36
Results you can rely on
CONSTRUCTION
37
Results you can rely on
CONSTRUCTION
38
Results you can rely on
CONSTRUCTION
39
Results you can rely on
CONSTRUCTION
40
Results you can rely on
CONSTRUCTION
41
Results you can rely on
CONSTRUCTION
42
Results you can rely on
CONSTRUCTION
43
Results you can rely on
CONSTRUCTION
44
GROUTING MOCK-UP
• SPECIAL PROVISIONS REQUIRED THE GROUTING MOCK-UP
OF AN ENTIRE CONTINUITY TENDON
• RAMP EN TENDON D1-1 (400’ LENGTH, 13’ HEIGHT)
Results you can rely on
CONSTRUCTION
45
Results you can rely on
CONSTRUCTION
46
Results you can rely on
CONSTRUCTION
47
Results you can rely on
CONSTRUCTION
48
RAMP SE – BENT 2
Results you can rely on
CONSTRUCTION
49
• RAMP SE – BENT 2
Results you can rely on
CONSTRUCTION
50
Results you can rely on
Construction
51
Decorative Panels
Results you can rely on
CONSTRUCTION
52
• RAMP EN
Results you can rely on
QUESTIONS / ANSWERS
53
Durk Krone, P.E., Principal
TRC Engineers, Inc.
8550 United Plaza Boulevard, Suite 502
Baton Rouge, LA 70809
T: 225.216.7483
Follow us LinkedIn Twitter
www.trcsolutions.com
Mike Paul, P.E., Project Manager
TRC Engineers, Inc.
8550 United Plaza Boulevard, Suite 502
Baton Rouge, LA 70809
T: 225.216.7483
Follow us LinkedIn Twitter
www.trcsolutions.com
Results you can rely on 54
BASEMENT
Results you can rely on
DESIGN CHALLENGES
55
SEISMIC DESIGN (2012 AASHTO LRFD)
• SEISMIC ZONE 1 (SECTION 3.10.9.2)
• As = 0.06
• CONECTION FORCE = 0.25 x TRIB VERT LOAD
• ADDRESS CONNECTION FORCE
FROM POINT OF
APPLICATION TO THE
FOUNDATION
• OPTIMIZED DESIGN WITH
SEISMIC ANALYSIS 0.00
0.04
0.08
0.12
0.16
0.20
0.24
0.28
0.00 0.50 1.00 1.50 2.00
Sa (
g)
PERIOD, T (SEC)
DESIGN RESPONSE SPECTRUM
(Tributary Vertical Load = 0.25)
SDS = 0.15
SD1 = 0.10
Results you can rely on
DESIGN CHALLENGES
56
BEARING TYPE SELECTION
• POLYETHER URETHANE DISK BEARINGS WITH PTFE
SLIDING SURFACES
BEARING CONFIGURATION & ORIENTATION
• SHORT CHORD MOVEMENT
FIXED UNI DIR. MULTI DIR.
Results you can rely on
DESIGN CHALLENGES
57
RAMP EN/ES GORE AREA • GEOMETRIC CONSTRICTIONS
• CANTILEVERED APPROACH SLAB
• TAPERED RAMP EN BRIDGE
• GEOTECH. CONSIDERATIONS FOR
MSEw
Results you can rely on
DESIGN CHALLENGES
58
BRIDGE ABUTMENT ON MSE WALL • 40’ TALL MSEw
• ABUTMENT SPREAD FOOTING (20’x55’x4’)
• LOAD TRANSFER PLATFORM (113’x54’x3’)
Results you can rely on
CONSTRUCTION
59
POND NEAR RAMPS EN & WN
Results you can rely on
CONSTRUCTION
60
SEGMENT CASTING YARD
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
61
• CONSTRUCTION DETAILS • FORMS TO ACCOMMODATE VARIABLE DEPTH
• FORMS TO ACCOMMODATE VARIABLE WIDTH
Results you can rely on
CONSTRUCTION
62
FLOODING
Results you can rely on
DESIGN CHALLENGES
63
EXPANSION JOINTS • SELECTION TYPE - FINGER
JOINTS
• DETAILS – CONSIDERATION OF
LONGIT & LATERAL
MOVEMENT
F°
C
6”
6”
A
B
A
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
64
• SEGMENT BOX DESIGN • PIER SEG. SECTION DEPTH = 13FT
• TYP. SEG. SECTION DEPTH = 9FT
• LINEAR TRANSITION - 5 HAUNCH SEGMENTS EACH SIDE
OF PIER SEGMENT
VARIABLE DEPTH SECTION
9’-0
”
13’-
0”
Results you can rely on
BRIDGE DESIGN
65
CONCEPTUAL STAGE • INTERACTION BETWEEN ROADWAY & BRIDGE DESIGNERS
• CONCEPTUAL BRIDGE GEOMETRY
• FINAL ROADWAY GEOMETRY
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
66
• RAMP EN SPAN 1 - C.I.P CONCRETE BOX • VARYING BRIDGE WIDTH, TOO WIDE FOR THE TYPICAL
SEGEMENT DESIGN
• CANTILEVER TO WINGS MATCH SEGMENTAL BRIDGE FOR
AESTHETICS
TYPICAL SECTION
SPAN 1 PLAN VIEW - SPAN 1
Results you can rely on
LONGITUDINAL MODEL
BRIDGE DESIGN - SEGMENTAL ALTERNATE
67
• SEGMENTAL DESIGN
• LONGITUDINAL DESIGN
• COMMERCIALLY AVAILABLE
SOFTWARE PACKAGE
• TIME DEPENDENT
• STAGED CONSTRUCTION
• TENDON GEOMETRY AND
STRESSING SCHEDULE
• TRANSVERSE DESIGN
• 3-D FEM MODEL
• SHELL ELEMENTS
• SEGMENT DESIGN
• 3D FEM & STM MODELS TRANSVERSE-MODEL
X
YZ
Loadcase: 4:LL: Cantilever Tandem
Results file: Transverse_46Width_Final.mys
Entity: Force/Moment - Thick Shell
Component: Mx
13.1687
11.2874
9.40618
7.52494
5.64371
3.76247
1.88124
0.0
-1.88124
Maximum 14.981 at node 2767
Minimum -1.95011 at node 2953
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
68
POST-TENSIONING DETAILS
• DIABOLOS
zzzz
DIABOLOS LOCATIONS
CONTINUITY TENDONS
Results you can rely on
BRIDGE DESIGN - SEGMENTAL ALTERNATE
69
POST-TENSIONING SYSTEM • CONTINUITY TENDONS WITH DIABOLOS
• CANTILEVER TENDONS
Results you can rely on
BRIDGE DESIGN - STEEL ALTERNATE
70
C L GIRDER 3 C L GIRDER 1 C L GIRDER 2
VARIES 44’-10 ½” TO 64’-0”
VARIES
13’-5 1/4”
TO 22’-11 5/8”
8’-
0”
1’-
2 3
/4”
VARIES
13’-5 1/4”
TO 22’-11 5/8”
BRIDGE SECTION - RAMP EN - UNIT 1
Results you can rely on
BRIDGE DESIGN - STEEL ALTERNATE
71
DESIGN SOFTWARE • COMMERCIALLY AVAILABLE GRILLAGE ANALYSIS
SOFTWARE PACKAGE FOR DESIGN PRODUCTION
• VERIFIED GRILLAGE RESULTS WITH 3D FEM MODELS
Results you can rely on
BRIDGE DESIGN - STEEL ALTERNATE
72
W
RW
S2 S1
C L GIRDER 2 C L GIRDER 1
TYPICAL BOX GIRDER SECTION
RAMP EN SE WN
W (FT) 42.5-44.8 35.5 31.5
RW (FT) 40-42.3 33.0 29.0
D (FT) 8.0 7.5 6.3
S1 (FT) 11.7-12.3 9.17 8.2
S2 (FT) 11.2-12.3 9.17 8.2
Results you can rely on
BRIDGE DESIGN - STEEL ALTERNATE
73
RAMP EN SE WN
TOTAL LENGTH (FT) 3,070 3,300 700
UNITS 5 4 1
SPANS 15 16 4
MAX. SPAN (FT) 255 230 195
WIDTH VARIES (FT) 42.5 - 64 35.5 31.5
Results you can rely on
CONSTRUCTION
74
• PROPOSED DESIGN
MODIFICATIONS
• SEGMENTAL ERECTION SCHEME
• DESIGN DOCUMENTS INDICATE
GROUTING BEARINGS AFTER
CLOSURE POURS
• CONTRACTOR PROPOSED TO
GROUT BEARINGS AFTER
ERECTION OF 1D/1U SEGMENTS
Results you can rely on
CONSTRUCTION
75
• VALUE ENGINEERING PROPOSALS
• RE-GRADING POND AND RAISE FOOTINGS AT SE & WN
• INITIAL PROPOSAL ABANDONED DUE TO GEOTECHNICAL AND
SCHEDULE ISSUES
• SUBSEQUENT PROPOSAL HAD LESSER FOOTING ELEVATION
INCREASES
• REQUIRED RE-DESIGN BY EOR’S
• IMPLICATIONS FOR SEISMIC & POST TENSIONING
Results you can rely on
CONSTRUCTION
76
• VALUE ENGINEERING PROPOSALS
• REPLACE RAMP WN BRIDGE WITH FILL
• PROPOSAL ABANDONED DUE TO LARGE MAGNITUDES OF
REQUIRED FILL AND UNKNOWN SOIL IMPROVEMENT
REQUIREMENTS
Results you can rely on
PROJECT TIME LINE
• TIMELINE OF EVENTS
77
DATE EVENT
JAN 2, 2013 ADVANCED NTP ISSUED FOR FINAL DESIGN
DEC 6, 2013 PHASE I - PS&E SUBMITTAL
FEB 5, 2014 PHASE I - LETTING
FEB 14, 2014 PHASE II - PS&E SUBMITTAL
APR 30, 2014 PHASE II - LETTING
APR 28, 2014 PHASE I - NTP FOR CONSTRUCTION
SEP 15, 2014 PHASE II - NTP FOR CONSTRUCTION
JUN 1, 2014 PHASE I - BEGIN CONSTRUCTION
NOV 3, 2014 PHASE II - BEGIN CONSTRUCTION
FEB 1, 2017 PHASE I - ESTIMATED COMPLETION DATE
APR 4, 2017 PHASE II - ESTIMATED COMPLETION DATE