3K5G Trunk Mains Crossing Railways draftV2

3K5G August 2007

TRUNK MAINS CROSSING RAILWAYS

VALVE PORTFOLIOS

3K5G

Signature Date

Author: Rob Gamache

Project Manager: William Chan

Checked By:

3K5G August 2007

Contents

1 INTRODUCTION ...................................................................... 3

2 VALVE PORTFOLIOS .............................................................. 3

2.1 DESKTOP VALVE PORTFOLIOS ....................................................... 3

2.2 FIELD TESTED VALVE PORTFOLIOS ............................................... 3

2.3 CONTINGENCY SITE .......................................................................... 4

3 RECOMMENDATIONS ............................................................ 4

Tables Table 1 Valve Check Results ........................................................................... 3

Appendices Appendix A

3K5G August 2007

1 Introduction

The objective of the AMP4 Trunk Mains crossing railways Programme is to understand and mitigate the risk associated with trunk mains crossing railways. There are currently 2439 crossings identified on our GIS system and they are ranked v high, high, medium and low based on a number of factors related to the consequence if the mains should burst and also characteristic of the assets e.g. main size, pressures, flows, etc. Funding during this AMP has enabled the majority of these sites to be addressed, having a desktop portfolios produced and field tested. The outputs of project 3K5G was to produce portfolios for 885 of the sites with 400 being field tested. Keen commerical management and an automated process has allowed this to be exceeded. Each pack now covers a number of the crossings for 1128 packs will cover the 2439 crossings. Of these 1024 desktop portfolios have been produced and 721 field tested.

2 Valve Portfolios

2.1 Desktop Valve Portfolios

A desktop portfolio is a pack of information identifying the valves that are required to be operated to isolate the a main in the event network failure occurs. Initially this process was carried out manually using Eagle, printing and scanning documents. A GIS specialist was then engaged and an automated process was produced which selected valves identifed by means of tracing the main where polygons and pdf versions of the valve portfolios where produced. 1124 valve portfolios were produced and are held in the ‘Contingency Site’ on the Thames Water Portal, under the ‘Asset & operational’ business area. Appendix A provides more detailed information with regard to software used, identification numbers, tagging, and a list of the sites addressed etc.

2.2 Field Tested Valve Portfolios

A field tested valve portfolio is a survey of the valves to confirm the position of the valve, that access is clear and that the spindle is attached to the valve. The latter is done by turning the valve spindle 1 full revolution in each direction. Any difficulties were logged and the results are shown in the table below. This information is held in the ‘Contingency Site’ and was also highlighted to the team that maintains valves.

Table 1 Valve Check Results

Type and Requirement Count

Operational 2662

Box Adjustment 61

Box Exchange 53

Box Missing 629

Network Proving 210

Spindle Missing 126

Valve leaking 25

Valve seized 71

Valve Revisit 393

Total Number of Valves checked 4230

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2.3 Contingency Site

The ‘Contingency Site’ holds all the information collated for this project. It also holds all information collated for the High Consequence Locations projects. It should be noted that the Valve Portfolios are not contingency plans but form part of a contingency plan and act as control measures to mitigate flooding and possible risk to life & limb. The documents have been designed to assist in the reduction of main isolation times and control the flow of water should a failure occur. The site can be found under the ‘Asset & operational’ business area of the Thames Water Intranet. A number of folders have been created to hold the documents as well as accompany other contingency documents. The index is shown below.

Abstraction Lee Valley Thames Valley

Production Section 3 LPP Outputs Section 4 Wells Stations

Transmission Section 1 TWRM Shafts Section 2 Pumping Stations Section 5 Reservoirs Section 7 TWRM sections

Network Section 6 Selected Transfer Mains Section 8 Selected Principle Mains

Valve Portfolio’s North London South London Thames Valley RCTM Valve Database

3 Recommendations

In order to maintain the validity of the information packs it is recommended that the current version of Table 1, which can be found in the ‘contingency site’ should be addressed in order that all valves are available in the case of an emergency or routine activity. In addition these packs form only the first part of a contingency plan and do not provide information about the effect on supply as a result of isolation and shutting the valves highlighted in the portfolios. It is recommended that full contingency plans are developed for each of the risk sites held in this repository.

3K5G August 2007

Appendix A

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Contents

1 INTRODUCTION .............................................................................. 7

2 PREVIOUS STUDIES ........................................................................ 7

3 ACTION PLAN ................................................................................ 8

4 OUTPUTS ..................................................................................... 8

5 VALVE PORTFOLIO .......................................................................... 9

5.1 NAMING CONVENTION (Unique Shut-table Section I.D) ............................................. 9

5.2 EXAMPLE 1 ............................................................................................... 10

5.3 EXAMPLE 2 ............................................................................................... 11

5.4 EXAMPLE 3 ............................................................................................... 12

5.5 OVERVIEW PAGE ....................................................................................... 13

5.6 INDIVDUAL PLAN ........................................................................................ 14

5.7 DETAILED INFORMATION ............................................................................. 15

5.8 SOFTWARE APPLICATION ............................................................................ 15

5.9 HOW THEY ARE USED ................................................................................. 16

6 VALVE TAGGING & EXERCISING ........................................................ 17

6.1 VALVE GROUP EXAMPLES ........................................................................... 18

6.2 FITTING OF VALVE TAGS ............................................................................. 19

6.3 COMPONEMENT BREAKDOWN & UNIT COST OF TAG EQUIPMENT ......................... 20

6.4 SUPPLIER CONTACT DETAILS FOR TAGGING EQUIPMENT ................................... 20

7 VALVE DATABASE ......................................................................... 21

7.1 SITES SUMMARY REPORTS .......................................................................... 21

7.2 MAIN SUMMARY REPORTS ........................................................................... 21

7.3 VALVE RPEORTS ....................................................................................... 21

7.4 REGIONAL REPORTS .................................................................................. 21

7.5 SITE SUMMARY PAGE ................................................................................. 21

7.6 UPDATING ................................................................................................ 21

8 CORPORATE GIS – OPERATIONAL SUPPORT TOOL ................................. 22

8.1 HOTSPOT POLYGONS & RISK ASSESSMENTS ................................................... 22

9 CONTINGENCY WEB SITE ................................................................ 22

9.1 CONTINGNECY WEB LOCATION ..................................................................... 22

9.2 PORTAL CONTINGENCY SITE STRUCTURE....................................................... 22

10 SUMMARY .................................................................................. 23

10.1 MAINS SUMMARY ....................................................................................... 23

10.2 VALVES SUMMARY ..................................................................................... 23

11 PROJECT KEY CONTACT ................................................................. 23

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1 INTRODUCTION

During the AMP3 period there have been a number of projects aimed at identifying lists of key trunk main sections on the clean network where the consequences of failure could be high, and where speed of operational response is critical.

Projects such as the High Consequence Trunk Mains, (HCTM), the LUL Flood Mitigation Study and Trunk Mains Under Railway Crossing, have already identified lists of significant sites.

As a result of the increasing tendency towards litigation and liability, there is likelihood that further risk issues such as Flooding threat to basement properties, other LUL Stations, CTRL crossings, critical supply related sections are to be similarly addressed in AMP4.

In each instance there is the need for accurate, readily accessible and up to date information in an easily comprehensible and convenient format for print or electronic transmission to all potential users. The portfolio must provide both practical GIS plans & network details for all key sections of main and the valves required to secure the necessary shut, plus up to date operational contingency plans to address the constant changes to the wider supply network.

This project aims to standardise the format and compatibility of information captured by such projects and optimise future Operational benefits by helping to improve emergency response times for network isolation.

2 PREVIOUS STUDIES

HCTM (High Consequence Trunk Mains Project) has identified some 44 sites, comprising over 200 shut table sections. The Project is now complete and has partly set the preferred standard of portfolio presentation.

LUL (London Underground Flood Mitigation Project) investigated 18 Underground Stations (comprising 84 shut table sections) where the consequence of flooding, which could result from a multiple trunk main burst, is potentially high. While the project has captured all necessary information on the relevant mains sections, it only addresses the requirements of the most unlikely worst case burst scenario, and does not present the information in an operationally convenient format.

A defined Main such as the 30” Caledonian Rd (N1) may comprise several Shut able sections, each of which may in turn comprise numerous junction to junction Spans between each side connection. Eagle GIS data for the Clean Network currently offers a unique “Object ID” for each span, but in practice this unit of reference is not commonly used to any purpose.

Of far more practical benefit would be the defining of a discreet “Shut table section”. This is the mode by which an Operational crew would approach and close down any burst event, and is the unit, which currently lacks any unique identifier.

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3 ACTION PLAN

RCTM (Rail Crossing Trunk Mains) to address high-risk sites where rapid operational response times could be critical to a future event.

Consult Northgate for the development of automated GIS system for rapid valve portfolio production.

Consult GIS Foundation Project Team on the addition of a unique “Visible attribute” field to accommodate identified Shut table Section (SS) Reference ID on the new GIS software application

Analysis of original risk sites, re-assign risk levels and group mains into site, remove duplication and produce data spreadsheet.

Create polygon files for all RCTM locations, named & numbered ready for valve portfolio production.

Upload Polygons into OST as Interim solution. Polygons will be loaded into OST (Operational Support Tool) same as the HCTM and will form part of the risk assessment process.

Detailed agreed for the specification of Rail Crossing Trunk Mains & any future High Consequence Mains Portfolio Projects:

GIS overview plans with locations of detailed operability plans

GIS operability plans with valve details included.

Operations Contingency Plan including recovery plan and review process.

Portal Contingency Site to be created & developed so all completed portfolio for all RCTM mains can be published and available to the business.

Briefing pack & Training for Water Control & Operations to be held.

4 OUTPUTS

The valve portfolio documents are not contingency plans but form part of a contingency plan and act as control measures to mitigate flooding and possible risk to life & limb. The documents have been designed to assist in the reduction of main isolation times and control the flow of water should a network failure occur.

The valve portfolio documents are produced through the new developed GE (Northgate) system using Corporate GIS data to allow tracing of any discreet shut-table section of a defined main, and saved using an initial unique alphanumeric ID along with trunk main identifier and road name for ease of reference. This then becomes the overall site name that the business will use to determine the correct portfolio to use.

Each valve portfolio document is surveyed using trained & equipped personnel to gain an understanding of the valves operational condition. The technician locates the valve in the field, clears the valve chambers of debris and exercises valve spindles one revolution each way, the spindles are then tagged using tagging equipment that display the corporate unique control reference number generated from the corporate GIS system and displayed on the valve portfolio document. This unique control reference ID is the key link between the field and the control room using the valve portfolio and corporate

The valve portfolio documents are then uploaded onto the Corporate Portal Contingency Site for business availability and the corporate Operational Support Tool updated with HOTSPOT polygons to form the link between corporate OST and the Portal. The information is available to all Operational staff from strategic management through to front-line staff.

The valve portfolio unique alphanumeric ID and the documents location is automatically picked up during a OST risk assessment trace, the information may assist when carrying out risk assessing as part of the PTW process.

Due to the continual changing environment there can be no guarantee any identified valve will be operational at the time of need, therefore, each document must be reviewed following each occasion it is implemented and regular maintenance testing and review of the plan must be carried out to ensure it validity.

For maximum benefit the valve survey database should be used in conjunction with the Valve Portfolio.

Valve Portfolio Production Training document available

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5 VALVE PORTFOLIO

5.1 NAMING CONVENTION (Unique Shut-table Section I.D)

Each Site will have an initial unique number along with trunk main identifier and road name for ease of reference. This will become the overall site name that the business will use to determine which portfolio to use, this is he same naming format used in previous studies.

The naming convention spans across all three regions begin with:

TVR = Thames Valley

NR = North London

SR = South London

Further unique identifying for each shut-table section and detailed operability plan for updating purposes are then numbered according to Area Network Manager boundaries for ease of use.

Note: Some identified RCTM have already been identified as HCTM sites, therefore, these sites will not be revisited as part of this project but will retain the HCTM unique SS number for those sites.

There will then be further naming for each detailed plan, these are the short code that will be used to give each plan its unique identifier, and operations will also use these along with the Business update procedure.

Example: TVR02 24/1/2

In some instances there maybe more then one main in a site. Note the flooding area, there maybe no telemetry on the mains and mains can damage adjacent mains when failed so the mains have been grouped in the same site Number.

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5.2 EXAMPLE 1

Area – North London = NR

Site No. 200 = NR200

Valve Portfolio’s

NR200 12”

NR200 24”

NR200 36”

12”

36”

24”

24”

12

36”

12”

24”

36”

12”

24”

36”

Flood Area

Flood Area12”

36”

24”

24”

12

36”

12”

24”

36”

12”

24”

36”

Flood Area

Flood Area

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5.3 EXAMPLE 2

Area – South London = SR

Site No. 129 = SR129

Valve Portfolio’s

SR129 36”

SR129 12”

Flood Area

36”

36”12”

12”

Flood Area

36”

36”12”

12”

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5.4 EXAMPLE 3

Area – Thames Valley = TVR

Site No. 32 = TVR32

Valve Portfolio’s

TVR32 24”

NB: Any valves in very close proximity to potential flooding area have been surveyed but ignored in the trace therefore identifying the next set of isolation valves.

24”

24”

Flood Area

24”

24”

Flood Area

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5.5 OVERVIEW PAGE

The overview shows the full route of the trunk main section and displays a list of the entire fitting associated with that section. The overview displays the number of individual plans associated with the valve portfolio and is particularly useful for technician deployment for rapid isolation of the main. Should the event controller split up the pack between a number of field technicians for rapid valve closure, he has the global picture and so can deploy his teams effectively.

Displays full extent of the trace.

Each square represents a page of the portfolio.

Displays all associated fittings with relevant details.

Pack can be split into manageable segments.

Event Controller or Activity Leader can use overview.

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5.6 INDIVDUAL PLAN

This plan shows network detail with some plans having additional detailed map boxes. For additional clarity the identified main has been highlighted in red (corporate large diameter main colour) while the other assets remain in grey.

Identified main & fittings highlighted in RED.

Control Ref displayed by box & connection link.

Detailed map boxes displaying enlarged network.

Page Continuation markers should map get split up during on site operations.

Page number displayed in title on page.

Each page displays list of valve fittings. Key Data displayed:

Road Names

Network Configuration

Network text (size,)

Building Numbers Valve Ref numbers

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5.7 DETAILED INFORMATION

1.Control Ref: This is the unique Control Reference Number used for each valve on the network. The valve spindles have been tagged using this number for ease of identification. See also Tagging.

2.Valve Imp/Metric: Size of valve as captured on corporate GIS

3.Dir to Close: Direction to close valve as Captured on GIS, corporate terminology used in conjunction with field terminology I.e. CC = Counter Clockwise = RHS = Right Hand Shut.

4.Building: The building name or number the valve is situated outside or nearest to.

5.Road Name: The road name the valve is situated in

6.Postcode: The postcode the valve is situated in.

5.8 SOFTWARE APPLICATION

The Software used to produce the Valve Portfolio’s is called Geodysis, the software is used by the Technical Information Service Team and is supported externally.

The project has tailored the software to enable fast production of valve portfolios to the precise requirement of the business.

The software requires a PC/Lap top and a Dongle, the dongle acts as a security device and cannot be operated without one. The licence for this applications costs the business approx £1000 P/A for each dongle.

The software does require a degree of GIS knowledge to operate it fully, however, the process has been simplified and basic training document has been written.

1. 2. 3. 4. 5. 6. 7.

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5.9 HOW THEY ARE USED

SCENARIO 1

Field Tech phones in Tag # to NMC --- NMC types in Tag # to OST and OST displays Valve and Valve Portfolio number via Hotspot polygon ---- NMC then types Valve Portfolio # into Portal search engine and Portal displays Valve Portfolio --- Valve Portfolio # can also be typed into Valve database to view valve condition reports.

SCENARIO 2

Stakeholder contacts NMC with event location details ---- NMC then types location details into OST and OST displays Valve Portfolio number via Hotspot polygon ---- NMC then types Valve Portfolio # into Portal search engine and Portal displays Valve Portfolio --- Valve Portfolio # can also be typed into Valve database to view valve condition reports.

SCENARIO 3

User raises a PTW & Job Diary in OST - OST automatically picks up Hotspot polygon and Valve Portfolio number as part of Risk Assessment Trace function --- user then includes Valve portfolio information as part of their mitigation for their PTW --- Valve Portfolio # can also be typed into Valve database to view valve condition reports.

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6 VALVE TAGGING & EXERCISING

Plastic Profiles

End Items (Red,Blue,White)

Symbol Elements strips of 20

characters

Blank Elements Strips of 20

Plastic coated cable

Crimps

The Components of Plate & Locate Tag

Plastic Profiles



characters



Crimps

Plastic Profiles



characters



Crimps

The Components of Plate & Locate Tag

Coloured Ends used

for “Valve Group” in-

line corporate GIS

system & BOP

colours.

Acronym as per

“Valve Group”

BOP

Unique Valve

Number easily

identifiable using the

GIS Corporate

system

Direction of Closure

shown same as

Corporate system

“until proven

otherwise”

Data Placed on Tag

Coloured Ends used

for “Valve Group” in-

line corporate GIS

system & BOP

colours.

Acronym as per

“Valve Group”

BOP

Unique Valve

Number easily

identifiable using the

GIS Corporate

system

Direction of Closure

shown same as

Corporate system

“until proven

otherwise”

Data Placed on Tag

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6.1 VALVE GROUP EXAMPLES

The colours are aligned with the Best Operating Procedures.

Red = Pressure Controlling

Blue = Flow Controlling

Tag by ‘Valve Group’ examples

Zone Boundary Valve

District Boundary Valve

General Purpose Valve

Tag by ‘Valve Group’ examples

Zone Boundary Valve

District Boundary Valve

General Purpose Valve

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6.2 FITTING OF VALVE TAGS

Plate & Locate option has been chosen due to quick

production as well as being cost effective. The design is

almost identical to what we have previously used in the

field.

Coloured ends have been chosen to assist in identifying

Pressure & Flow controlling valves (ZBV/DBV). Grid

Reference has been removed to ease any confusion.

Direction to close valve is also included. Valves can also

be easily identified by typing in “control ref number” into

corporate GIS system. The tags can be made up on site

or pre-fabricated in the office, the cable is then placed

around the spindle and tightened slightly so that the cable

does not twist on the spindle when it is turned.

Plate & Locate option has been chosen due to quick

production as well as being cost effective. The design is

almost identical to what we have previously used in the

field.

Coloured ends have been chosen to assist in identifying

Pressure & Flow controlling valves (ZBV/DBV). Grid

Reference has been removed to ease any confusion.

Direction to close valve is also included. Valves can also

be easily identified by typing in “control ref number” into

corporate GIS system. The tags can be made up on site

or pre-fabricated in the office, the cable is then placed

around the spindle and tightened slightly so that the cable

does not twist on the spindle when it is turned.

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6.3 COMPONEMENT BREAKDOWN & UNIT COST OF TAG EQUIPMENT

6.4 SUPPLIER CONTACT DETAILS FOR TAGGING EQUIPMENT

Company Name Contact Name Contact Telephone No.

Plate & Locate Ed Pantling 01565 750 147

Component Descrition Unit Cost (ex VAT)

PLASTICE PROFILES One profile required per tag £0.57

END ELEMENTS(strips of 20) Two end elements per tag £0.60

RED Pressure Controlling Valve (ZBV)

BLUE Flow Controlling Valve (DBV)

WHITE General Purpose Valve

SYMBOL ELEMENTS(strips of 20) Ten Symbol Elements per tag £0.60

CHARACTER = 0 Numeric symbol used for Valve Number









CHARACTER = B Alpa symbol used for Valve Group

CHARACTER = D Alpa symbol used for Valve Group

CHARACTER = G Alpa symbol used for Valve Group

CHARACTER = P Alpa symbol used for Valve Group

CHARACTER = V Alpa symbol used for Valve Group

CHARACTER = Z Alpa symbol used for Valve Group

CHARACTER = C Alpa symbol used for Valve Group

CHARACTER = A Alpa symbol used for Valve Group

BLANK ELEMENTS (strips of 20) Two Blank Elements per tag £0.60

CABLE minimum >100m required £0.77

CRIMPS (boxes) One crimp per spindle tag £0.10

RIVETS (boxes) Two rivets per spindle tag £17.00

RIVET GUN One gun per tag making team £25.74

PLIERS One Pliers per tag making team £8.99

Standard delivery charge £20.00

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7 VALVE DATABASE

7.1 SITES SUMMARY REPORTS

The database has the facility to run a Site summary report on every site. The report takes the High level information such as Number of mains associated with the site number, number of valves to isolates for each main, number of valves with condition and when the valves where last checked.

7.2 MAIN SUMMARY REPORTS

The database has the facility to run a Main summary report on every Main. The report takes the High level information such as Number of isolating valves for the main, number of valves with condition and their condition type and when the valves where last checked.

7.3 VALVE REPORTS

The database has the facility to run a Valve report on every Valve. The report takes the Low level information such as valve unique control ref number, survey comments, survey date, condition type, there are a number of different valve reports to choose form should a re-visit be required as part of maintenance programme.

7.4 REGIONAL REPORTS

The database has the facility to run a number of High & Low level Regional reports on every Valve and its condition type, number of mains, sites by regions, zone, and network area. The database also reports on low-level data such as valve unique control ref number, survey comments, survey date, condition type.

7.5 SITE SUMMARY PAGE

The database displays a Site Summary Page for every main. This page displays information such as percentage of workable valves on the main, a summary of valves workable and non-workable and their condition type. How many mains associated with the site number, the survey & valve portfolio production dates and the last valve condition reports based on last survey results. The Site Summary Page also displays London Underground Station name if applicable.

7.6 UPDATING

The database has an smart update facility, this enables the user to update a valves where the database recognises that the same valves relates to another main and site number thus automatically updating the valve details saving valuable time when carrying out maintenance work.

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8 CORPORATE GIS – OPERATIONAL SUPPORT TOOL

8.1 HOTSPOT POLYGONS & RISK ASSESSMENTS

In order to make the information useable, polygons have been produced for every site and placed on the Corporate Operational Support tool as a HOTPOST polygon.

These polygons are automatically selected during the risk assessment process where a job diary is required. From the risk assessment report the user can simply select HOTSPOT details where the Valve Portfolio title and number will be displayed.

This number can be typed into the Portal search engine where the document will be displayed for use. The document can also be attached into the new PTW O.R.A software as part 5 of the users mitigation against flooding.

9 CONTINGENCY WEB SITE

The project set up the Contingency Site on the new portal frame for all valve portfolios to be held and made available to the business.

9.1 CONTINGNECY WEB LOCATION

The site can be accessed via the Thames Water Portal under Business Area – Contingency Site

9.2 PORTAL CONTINGENCY SITE STRUCTURE

A number of folders have been created to hold the documents as well as accompany other contingency documents.

Abstraction o Lee Valley o Thames Valley

Production o Section 3 LPP Outputs o Section 4 Wells Stations

Transmission o Section 1 TWRM Shafts o Section 2 Pumping Stations o Section 5 Reservoirs o Section 7 TWRM sections

Network o Section 6 Selected Transfer Mains o Section 8 Selected Principle Mains

Valve Portfolio’s o North London o South London o Thames Valley o RCTM Valve Database

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10 SUMMARY

10.1 MAINS SUMMARY

Surveyed 721

Desktop 1024

Identified 1128

10.2 VALVES SUMMARY

Box Adjustment 61

Box Exchange 53

Box Missing 629

Network Proving 210

Operational 2662

ReVisit 393

Spindle Missing 126

Valve Leaking 25

Valve Seized 71

Total Valves 4230

11 PROJECT KEY CONTACT

Name Position Company/Dept

Rob Gamache Project Engineer TWUL Engineering

William Chan ENG Project Manager TWUL Engineering

Robin Walker ENG Team Manager TWUL Engineering

Sarah Mitchel TIS Project Manager TWUL T.I.S

Lawrence Smith TIS Team Leader TWUL T.I.S

Samuel Adjei GIS Technician TWUL T.I.S

Tanya Dady GIS Technician ATKINS

Bill McBeth Contract Supervisor ATKINS

Rafal Redecki Contract Engineer ATKINS

3K5G Trunk Mains Crossing Railways draftV2

Documents

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