CONDITION ASSESSMENTOF THE

CENTRAL INTERTIE PIPELINEEngineering & Operations Board Meeting

February 16, 2016

1

PROJECT FACILITY

CIP- Central Intertie Pipeline

54-inch cement mortar lined and coated welded steel pipeline

Constructed throughout 1990s (4 contracts)

2

OSO PARKWAY

INTERSTATE 5

ANTONIO PKWY

MARGUERITE PKWY

CIP

PROJECT HISTORY

Previous Studies:

2012 CH2M Hill Corrosion Assessment

2014 Current Interruption Study

Evaluation of available technologies

Current Study: 2015/2016 Magnetic Flux Leakage (MFL) Condition Assessment

Why MFL?

3

GOALS, SCOPE & CHALLENGES

Goals True condition assessment Strategic repairs Establish “baseline”

Scope Dewatering Appurtenance removal Pipe ovality inspection MFL inspection Engineering analyses Welded steel patch repairs Commissioning CIP

Challenges

4

SAFETY PRECAUTIONS

5

PIPELINE PREPARATION: APPURTENANCE REMOVAL

6

MFL TOOL BUILD

MFL INSPECTION

MFL DATA ANALYSIS

Raw Data (Location)

Trace Plot (Depth)

Contour Plot (Area)

Grout Plug

Girth Weld

Spiral Weld

9

VISIBLE DEFECTS

10

MARKING DEFECTS AND REMOVING MORTAR

11

ULTRASONIC THICKNESS TESTING

12

WELDED STEEL PATCH REPAIR

13

RESULTS AND CONCLUSIONS

Multiple engineering analyses performed

A number of “anomalies” identified

31 repairs (i.e. steel patches) performed

Worthwhile investment in critical District asset

Uncertainty has been eliminated

True 2015 “baseline” has been established

Despite repairs, action is still required Repairs to pipeline appurtenances

Installation of active cathodic protection (CP) system

Establishment of future assessment schedule for CIP

Evaluation of CP program for other District assets

14

BAKER WATER TREATMENT PLANTPROJECT UPDATE

1

February 16, 2016

BAKER WATER TREATMENT PLANT PROJECT

▪ Capacity 43.5 cfs (28.1 mgd)

▪ IRWD acts as lead agency

▪ Raw Water through Baker Pipeline

▪ Independent of Diemer WTP

▪ Alternative Source includes Irvine Lake Water

▪ Two Project Components:

▪ Baker Plant

▪ Raw Water Conveyance

▪ Construction in progress

2

Diemer

Plant

Santiago

Lateral

Lower

Feeder

AMP

Baker

Pipeline

Baker

Plant Site

Lake

Mathews

2

Baker WTP Chlorine Dioxide System

Forebay

Feedwater Pump Station

Treatment Building

Membrane and UV Process

Chemical Building

Dewatering Building

Disposal Equalization Basin

Backwash Treatment System

Product Water Pump Station

Electrical / Power / Utilities 3

Major Project Components

RWCF– Flow Control Facility

– Raw Water Pump Station

– TCWD Pump Station

– OC-33 Meter Replacement

– Pipeline Tie-ins

Project Overview – thru Dec 2015

Project Info:Contractor:

Contract Duration:

Notice of Award:

Notice to Proceed:

Revised Contract Completion:

Original Contract Amount:

Approved Change Orders:

Revised Contract Amount:

Invoiced to Date:

Percent to Date:

WTPPCL Construction

820 days

Jan 6, 2014

Feb 5, 2014

Apr 8, 2016

$77,520,613

$198,063

$77,718,676

$61,799,824

79.5%

RWCFPacific Hydrotech

455 days

Jan 6, 2014

Jan 22, 2014

Apr 6, 2016

$4,995,744

$195,024

$5,190,768

$4,886,052

94.1%

$57.86M

$0 M

$10 M

$20 M

$30 M

$40 M

$50 M

$60 M

$70 M

$80 M

Jan-14 Apr-14 Jul-14 Oct-14 Jan-15 Apr-15 Jul-15 Oct-15 Jan-16 Apr-16

Baker Water Treatment PlantPCL Construction Cost

PCL Projected Cash Flow Actual

PCL Cumulative Expenditures

$62 M

3 mth

6

DN Tanks coring pipe penetrations

Advancing PWPS and discharge pipe

Advancing main process areas: Forebay, Treatment, CT Basin, Chemical Storage, Dewatering

Advancing Flow Control Facility and TCWD PS

Product Water Pump Station

Chemical Building

Flow Control Facility

Trabuco Canyon Pump Station

MF Feed PS and Forebay

Treatment Building

Dewatering, CT Basin & Thickeners

2 MG

16 MG

SITE OVERVIEW

7

TCWD PUMP INSTALLATION

8

TCWD PUMP STATION

9

MF FEED PUMP STATION AND FOREBAY

10

MF FEED PUMP STATION

11

TREATMENT BUILDING

12

TREATMENT BUILDING – INTERIOR

13

TREATMENT BLDG. – MEMBRANE RACKS

14

PRODUCT WATER PUMP STATION

15

PWPS – GENERATOR BUILDING

16

CHEMICAL BUILDING

17

DEWATERING BLDG. AND TRUCK LOADING AREA

18

AERIAL – FLOWN OCTOBER 2015

19

Questions?

PLANT 3A CREEK MITIGATION PLAN

February 16, 2016

3A WASTEWATER TREATMENT PLANT

Secondary and advance treatment capacity

Constructed in 1986

Capacity owned by MNWD and SMWD

To O

so P

arkw

ay

To C

row

n V

alle

y P

arkw

ayLa Paz Creek

ISSUE

La Paz Creek Flooding of Plant 3A

Historical

Recent – September 2015

FLOOD EXTENTS

Text text

Location

PROTECTION PLAN

Short term

Long term permanent solution

SHORT TERM

California Fish and Wildlife permit

Caltrans permit

Potentially clear the creek – 5 year obligation to mitigate

Cost : up to $200,000 for 5 years

PERMANENT SOLUTION

Assess flooding extents

Identify best permanent solution

Seek grant funding such as FEMA

UPCOMING ACTIONS

Continue to work with permitting agencies on short term solution

If vegetation removal limits agreed upon by California Fish and Wildlife, hire removal firm and monitors

Initiate evaluation of permanent solution