T03 river crossing-misterly

ConstructionConstructionConstructionConstructionProject Project

DevelopmentDevelopmentProject Project

DevelopmentDevelopmentDB DB

ApproachApproachDB DB

ApproachApproachBackgroundBackground DesignDesignDesignDesign

Outline2

Outline

Backgroundg

Design Build Approach Project Development Project Development Design

C t ti Construction






JEA3

7th largest utility in US 2nd largest in Florida North & South Grids TWMP- $80M Shift water to South Grid 6 Pipe Segments

K i i Ri C i Key portion is River Crossing Directional Drill






River Crossing4

g Downtown Jax Directional Drill 36” diameter 6,572’ long 100’ below River 100 below River

Highly complex Aggressive schedule Chose Design-Build

Project Location – Jax, Florida






5

RiverDrill RigDrill Rig Pipe Delivery

River

A Pipe Delivery & Staging

Pipe Assembly

HDD PipelineDrill Pilot Hole

B Drill Pilot Hole & Begin Pipe String Assembly

Pipe String Assembled

Ream/Swab HoleC

Ream/Swab Hole & Finish Pipe String Assembly

Drill Rig Pipe String Pulled

HDD PullbackD HDD Pullback

HDD PipelineInstalled Subaqueous Pipeline

E Installed Subaqueous Pipeline






6

Drill Rig

Drill Pipe

Casing

D ill H d

Entry Pit & Mud Pit

Drill Head(See Blow-up)






7

Drill Head




ApproachApproachBackgroundBackgroundBackgroundBackground DesignDesignDesignDesign

Outline8

Outline

Backgroundg Design Build Approach Project Development Project Development Design

C t ti Construction





9

Project Challengesj g Schedule – Jags, FL/GA Design – alignment,

diameter, length, drill path, FDOT, ROW, multiple curvesu p e cu ves

Construction – pilot hole, pipe assembly, pullback,

d lroad closures Permitting – ACOE, FDEP,

FDOT, City of JaxEverBank Stadium

FDOT, City of Jax





Design Build Advantage10

Single point of accountability

Proper risk allocation

Early involvement of builder Early involvement of builder

Early involvement of specialized contractor

Schedule

Certainty of cost

Reduced claims

Unused allowances return to ownerUnused allowances return to owner





JEA’s Decision Making Process11

Project Drivers Regulatory Capacity Needs Pr

oject

Drive

rs

Capacity Needs

JEA’s objectives Proper risk allocation

P

DELIVERYDELIVERY Predictability of Cost

Project Complexity Specialized engineering

DELIVERYMETHODDELIVERYMETHOD

p g g Specialized construction Challenging conditions Multi agency permitting Multi-agency permitting Environmental compliance Traffic impacts





12

Risk Allocation MatrixDesign-Bid- Build (DBB) Progressive Design Build (DB)

Design and Construction Design Build Cost JEA Design-Builder

Design Defects JEA Design-Builder

Errors and/or Omissions JEA Design-Builder

Constructability JEA Design-Builder

Schedule/Completion JEA Design-Builder

Construction Warranties JEA Design-BuilderConstruction Warranties JEA Design Builder

Hazardous Materials JEA JEA

Unidentified Utilities JEA Design-Builder

Changing Soil Conditions JEA Design-Builder

Asset Management System Performance JEA Design-Builder

Life Cycle Costs JEA JEA

Operations and Maintenance JEA JEAp

Legal Third Party Litigation JEA JEA





Selection Process13

Progressive Design Build

2 step selection process

Qualifications based Qualifications based Qualifications Packages

3 teams shortlisted

InterviewsInterviews Key personnel & approach





JEA’s Procurement Documents14

Detail Get what you want

Pipe size Capacity Service life Schedule Submittal requirementsS q

Not so specific that you take on risk Geology Drilling method

Shared savings

Shift design/construction risk to DB Team





Outline15

Outline


C t ti Construction





Base Route16

2 HDDs

Open cut on Island

Environmental Impacts Environmental Impacts

Permitting challenges

Marine support

Frac out

Noise impact

Base Route





Base Route17

2 HDDs

Open cut on Island

Environmental Impacts Environmental Impacts

Permitting challenges

Marine support

Frac out

Noise impact

Base Route





Alternative Route18

Single HDD

Reduced Environmental Impacts

Reduced cost by $5M Reduced cost by $5M

Shorter schedule

Reduced permitting

Approach Evaluated multiple staging areas

Chose to use Arlington ExpresswayAlt route & pipe staging

Chose to use Arlington Expressway

Straight, but significant traffic impacts

Marine support

Frac out

Noise impact





ApproachApproachBackgroundBackgroundBackgroundBackground DesignDesign

Outline19

Outline


C t ti Construction






Design20

Survey, geotech, SUE

Route CurvesCurves

Staging

Pipe Assembly

Calculations Calculations Pull loads

Stresses

Operating pressures Operating pressures

Frac out calcs

PipeM t i l

Typical HDD Design

Material

Thickness

Coatings






Design Summary21

6,572’ long

36” diameter, ¾ thick

60’ below River 60 below River

Epoxy coating

Powercrete coating

3,600’ max bend radius

Entry/Exit angles 8 & 10 deg

Two vertical curves Note bend radiusTwo vertical curves

Three horizontal curves

Cathodic protection systems (both sides)






Pipe Assembly Planning22

Very challenging

6,572’ along AEW

Close coordination Close coordination Designers

Contractor

FDOT FDOT

Customized solution

Detailed schedule

Limited area for pipe string






Pipe Assembly Planning23

3 Assembly Areas #1 – (2) 766 ft segments

#2 – (2) 1,000 ft segments

#3 – (2) 1,520 ft segments






24

Assembly Plan for FDOT Assembly Plan for FDOT

ConstructionConstructionProject Project





Outline25

Outline


C t ti Construction






Pipe Procurement/Delivery26

Spec issued at 60% Design Step

Pipe arrived as design completed

40’ lengths

168 sticks

330 lbs/ft

2.2 M lbs2.2 M lbs

Pipe deliveryPipe delivery

Pipe manufacturing






Pipe Assembly27

Welding

July – 12 hr/day; 6 dpw

All welds inspected X-ray

Ultrasonic

Linings/coatings repaired & tested

200 psi hydrostaic test

Pipe delivery

Pipe weld






Temporary Casing28

60” steel

150’ each side

1” thick

Prevents Frac-out

Stabilizes pilot hole

Maintains drill angleMaintains drill angle

Grundoram

3 Trenchless Technologies HDDHDD

Pipe ramming

Jack and Bore






Pilot Hole29

Intersect method

12.5” drill bit

East Rig – Atlas 440

West Rig – Hercules 1200

Reaming & Swabbing 27” reaming pass 27 reaming pass

36” reaming pass

50” reaming pass

S b Swab pass






Final Pipe String Assembly30

Coordinate with Matthews Bridge Closure

Start Friday 7pm

2.5 days to complete

Move pipes from assembly areas

Create 1 pipe string

6,572’ long6,572 long






Final Pipe String Assembly31

Elevate pipe to align with entry pit

100 ton cranes

Install coupling and pipe head

Install buoyancy line






Pullback32

1.2M lb Rig - pulling

300 ton hydraulic thruster If pipe gets stuck






Pullback33

Broke drill rods 2x

Impacts to traffic

Owner and DB Team worked together Developed recovery plan

Recover drill rod

Re-ream hole to 50”

Use thruster together with rig

Communicate with media

Successful pullback

N l i No claims






Pullback34

Broke drill rods 2x

Impacts to traffic

Owner and DB Team worked together Developed recovery plan

Recover drill rod

Re-ream hole to 50”

Use thruster together with rig

Communicate with media

Successful pullback

N l i No claims






Summary35

Summary

Complex ProjectC p j Design Build Team worked together Team worked together

Questions3636