abu dhabi utility corridors design manual-en

Abu Dhabi Utility Corridors Design ManualVersion 1

The Abu Dhabi Urban Planning Council was created by Law no. 23 of 2007 and is the agency responsible for the future of Abu Dhabis urban and regional environments,

and the expert authority behind the visionary Abu Dhabi Vision 2030 Urban Structure Framework Plan published September 2007. Chaired by His Highness General

Sheikh Mohamed bin Zayed Al Nahyan, Crown Prince of Abu Dhabi, Deputy Supreme Commander of the UAE Armed Forces and Chairman of the Abu Dhabi Executive

Council, the Abu Dhabi Urban Planning Council defines the shape of human settlements in the Emirate, ensuring factors such as sustainability, infrastructure capacity,

community planning and quality of life, by overseeing development in the cities and in the Emirate as a whole. The Abu Dhabi Urban Planning Council ensures best

practice in planning for both new and existing settlements.

The Abu Dhabi Urban Planning Councils primary purpose is to deliver upon the vision of His Highness Sheikh Khalifa bin Zayed Al Nahyan, President of the United Arab

Emirates and Ruler of Abu Dhabi, for the continued fulfillment of the grand design envisaged by the late Sheikh Zayed bin Sultan Al Nahyan, Father of the Nation, and

the ongoing evolution of the Emirate of Abu Dhabi. By drawing on urban planning expertise from local Emiratis, throughout the Arab States of the Gulf, and around the

world, the Abu Dhabi Urban Planning Council strives to be a global authority on the future of urban planning and design.

Mandate of the Abu Dhabi Urban Planning Council

Chapter 1 - Foundation

1.1 Introduction

1.2 Manual Goals and Intent

1.3 Overview of Abu Dhabi 2030 Plans / Urban Street Design Manual

(USDM)

1.4 Compliance with the Abu Dhabi Urban Street Design Manual

1.5 Manual Jurisdiction

1.6 Applying this Manual

1.7 Manual Applicability

1.8 Design Flexibility

Chapter 2 - Stakeholders and Utilities

2.1 Authorities and Utility Providers

2.2 Types of Utilities

2.3 Coordination and Management of Utility Corridors

Chapter 3 - Design and Approval Process

3.1 Introduction

3.2 Design Process

3.3 Design Options

3.4 Submission Procedure

Chapter 4 - Utility Corridor Design

4.1 Right-of-Ways (ROW) Determined by the Abu Dhabi Urban Street

Design Manual (USDM)

4.2 Design Considerations and Requirements

4.3 Utility Installation, Operation and Maintenance Overview

Chapter 5 - Utility Corridors Guidelines

5.1 Introduction

5.2 Utility Corridors Disposition / Arrangement

5.3 Utility Arrangement Special Details

Table of Contents

Abu Dhabi Utility Corridor Design Manual

Page i

Chapter 6 - Evaluation and Updates

6.1 Introduction

6.2 Review Committee

6.3 Updating the Manual

Chapter 7 - Definitions and Abbreviations

7.1 Definitions

7.2 Abbreviations

Chapter 8 - References

8.1 References

Annex A: Utility Disposition Typical Arrangements

Acknowledgements

Page ii

Figure 3.1: Utility Disposition Arrangement

Figure 4.1: Typical Arrangement of SL conduits in Tree Pit

Figure 4.2: Typical Arrangement for FO and HS Duct banks

Figure 4.3: Typical Manhole Details for FO Corridor

Figure 4.4: Typical Manhole Details for HS Corridor

Figure 4.5: Solid Waste Collection Bins Schematic

Figure 5.1: Typical Plan Road Surface Finish

Figure 5.2: Typical Plan Staggering of Utilities

Figure 5.3: Utility Reservations for Access Lane City Context

Figure 5.4: Typical Utility Reservations for Street City Context

Figure 5.5: Typical Utility Reservations for Avenue City Context

Figure 5.6: Typical Utility Reservations for Boulevard City Context

Figure 5.7: Typical Utility Reservations for Access Lane Town Context

Figure 5.8: Typical Utility Reservations for Street Town Context

Figure 5.9: Typical Utility Reservations for Avenue Town Context

Figure 5.10: Typical Utility Reservations for Boulevard Town Context

Figure 5.11: Typical Utility Reservations for Access Lane Commercial

Context

Figure 5.12: Typical Utility Reservations for Street Commercial Context

Figure 5.13: Typical Utility Reservations for Avenue Commercial Context

Figure 5.14: Typical Utility Reservations for Boulevard Commercial Context

Figure 5.15: Typical Utility Reservations for Access Lane- Residential Context

Figure 5.16: Typical Utility Reservations for Access Lane- Emirati

Neighborhood Context

Figure 5.17: Typical Utility Reservations for Street - Residential and Emirati

Neighborhood Contexts

Figure 5.18: Typical Utility Reservations for Avenue- Residential and Emirati


Figure 5.19: Typical Utility Reservations for Boulevard - Residential and

Emirati Neighborhood Contexts

Figure 5.20: Typical Utility Reservations for Access Lane Industrial Context

Figure 5.21: Typical Utility Reservations for Street Industrial Context

Figure 5.22: Typical Utility Reservations for Avenue Industrial Context

Figure 5.23: Typical Utility Reservations for Boulevard Industrial Context

Figure 5.24: Typical Arrangement of Utilities at Intersections Access Lane x

Access Lane

Figure 5.25: Surface Finish of Utilities at intersections Access Lane x Access

Lane

Figure 5.26: Typical Arrangement of Utilities at Intersections Option 1

Figure 5.27: Surface Finish of Utilities at intersections Option 1





Figure 5.32: Typical Arrangement of Utilities at Roundabouts

Figure 5.33: Surface Finish of Utilities at Roundabouts

Figure 5.34: Typical Arrangement of Utility Tunnel Option 1

Figure 5.35: Typical Arrangement of Utility Tunnel Option 2

Figure 5.36: Typical Utility Corridor Arrangement for Streets with Metro /

Tram Lanes Option 1

Figure 5.37: Typical Utility Corridor Arrangement for Streets with Metro /

Tram Lanes Option 2

List of Figures

Page iii

Table 2.1: Stakeholders Roles and Responsibilities

Table 3.1: Utility Disposition Arrangement

Table 4.1: City Context Street ROW

Table 4.2: Town Context Street ROW

Table 4.3: Commercial Context Street ROW

Table 4.4: Residential Context Street ROW

Table 4.5: Industrial Context Street ROW

Table 4.6: Emirati Neighborhood Context Street ROW

Table 4.7: Water Supply Pipe Corridor Requirements

Table 4.8: Water Supply Corridor Allocation

Table 4.9: Wastewater Pipe Corridor Requirements

Table 4.10: Wastewater Corridor Allocation

Table 4.11: Irrigation System Pipe Corridor Requirements

Table 4.12: Irrigation System Corridor Allocation

Table 4.13: Stormwater Drainage Pipe Corridor Requirements

Table 4.14: Stormwater Drainage Corridor Allocation

Table 4.15: District Cooling Pipe Corridor Requirements

Table 4.16: District Cooling Chamber Corridor Requirements

Table 4.17: District Cooling System Corridor Allocation

Table 4.18: ADDC / AADC Power Corridor Allocation

Table 4.19 : Street Lighting Corridor Allocation

Table 4.20: Preferred Telecom Duct Corridor Requirements

Table 4.21: Telecom Corridor Allocation

Table 4.22: Gas Supply Corridor Allocation

Table 4.23: Minimum Space Requirements From Gas Installations during

Utility Repair

Table 5.1: Utility Reservations for Access Lane City Context

Table 5.2: Utility Reservations for Street City Context

Table 5.3: Utility Reservations for Avenue City Context

Table 5.4: Utility Reservations for Boulevard City Context

Table 5.5: Utility Reservations for Access Lane Town Context

Table 5.6: Utility Reservations for Street Town Context

Table 5.7: Utility Reservations for Avenue Town Context

Table 5.8: Utility Reservations for Boulevard Town Context

Table 5.9: Utility Reservations for Access Lane Commercial Context

Table 5.10: Utility Reservations for Street Commercial Context

Table 5.11: Utility Reservations for Avenue Commercial Context

Table 5.12: Utility Reservations for Boulevard Commercial Context

Table 5.13: Utility Reservations for Access Lane- Residential Context

Table 5.14: Utility Reservations for Access Lane- Emirati Neighborhood

Context (Excluding Type 1)

Table 5.15: Utility Reservations for Street - Residential and Emirati


Table 5.16: Utility Reservations for Avenue - Residential and Emirati


Table 5.17: Utility Reservations for Boulevard - Residential and Emirati


Table 5.18: Utility Reservations for Access Lane Industrial Context

Table 5.19: Utility Reservations for Street Industrial Context

Table 5.20: Utility Reservations for Avenue Industrial Context

Table 5.21: Utility Reservations for Boulevard Industrial Context

List of Tables

Page iv

www.upc.gov.ae


1.1 Introduction


1.3 Overview of Abu Dhabi Emirate 2030 Plans / Urban Street Design Manual (USDM)






Chapter 1-2

Abu Dhabi Utility Corridor Design Manual (UCDM)


1.1 Introduction

The Abu Dhabi Urban Planning Council (UPC) has

created a Utility Corridor Design Manual (UCDM) that

conforms to / complements the Abu Dhabi Urban

Street Design Manual (USDM) issued in 2010, to be

applied for new urban developments. The USDM

defines the Right-of-Way of various families of streets

based on the land use context within developments.

The Utility Corridor Design Manual (UCDM) defines the

location and width of the various utilities envisaged

to be constructed within the streets of new urban

developments in the Emirate. The target users of the

Manual include any party involved directly or indirectly

in the design and installation of utilities and all related

facilities within urban developments. Accordingly,

the main target users include, but are not limited to,

developers, urban planners, infrastructure engineers

/ designers and contractors involved in the design and

construction of any new urban development within

the Emirate of Abu Dhabi.

The UCDM shall be applied in conjunction with the

USDM, the Abu Dhabi Public Realm Design Manual, the

Building Code published by concerned agencies and

the utility corridor mapping specification published

by DMA, all of which are currently applicable in the

Emirate of Abu Dhabi.

Applicable manuals that should be considered

alongside the UCDM:

Abu Dhabi Urban Street Design Manual

Abu Dhabi Public Realm Design Manual

Building Code

Utility Corridor Mapping Specification


The UCDM has been prepared to realize the following

objectives:

Provide standard arrangements for the installation of utilities within the Right-of-Way of the streets;

Assist utility providers / developers to complete utility installations with minimum delays and

minimum interference with other utilities to ensure

the timely installation of utilities;

Minimize service disruptions and avoid damage to adjacent utilities during installation and / or repair

of utilities;

Minimize disruption to the traffic during the installation and maintenance of utilities;

Ensure standards and specifications are understood and achieved; and

Standardize utility locations to facilitate maintenance activities.

Further to the Manual objectives, it is expected that

the UCDM will facilitate the coordination between

the various utility providers, regulatory authorities

and consultants which will minimize the time taken

for approving the utility disposition details / drawings.

In addition, the UCDM will provide guidelines that

will minimize conflicts in the design of various utility

allocation. In particular, it clearly defines the location

and corridor width for each utiltiy.

The preparation of the UCDM comprised the following:

Identifying the requirements and current practices of the various stakeholders / utility providers /

Government agencies within the Emirate of Abu

Dhabi for the installation and maintenance of the

different utilities.

Incorporating the requirements in the proposed utility installation configurations so as to ensure

that the proposed reservations and their locations

are achievable, can be constructed and maintained,

and are acceptable to the concerned authorities /

utility providers.

Carrying out a bench marking study and comparing the current requirements to international standards

and common practices within other countries.

Providing guidelines to optimize the placement / installation of utilities within the limited Right-of-

Ways (ROWs) of the various street families proposed

by the USDM.

Chapter 1-3



Specifying the most appropriate / optimized configurations for the location of the different

utilities and their respective corridor widths.

Defining typical utility disposition (cross-sections) for the different street families within the different

land use contexts as per the USDM. These shall be

adopted for the utility dispositions within the ROWs

of streets for all future developments within the

Emirate of Abu Dhabi. 1.3 Overview of Abu Dhabi Emirate 2030 Plans / Abu Dhabi Urban Street Design Manual (USDM)

The UPC has published three regional framework

plans for the future developments within the Emirate

of Abu Dhabi. To support the implementation of Plan

Capital 2030, Plan Al Ain 2030 and Plan Al Gharbia

2030, the UPC also developed the Abu Dhabi Urban

Street Design Manual (USDM) which presents a new

view of urban street design practices for the Emirate

of Abu Dhabi in accordance with the aspirations of

Vision 2030. The USDM prescribes greater mobility

and safety for non-vehicular traffic and deviates from

the conventional classification of streets based on

traffic volumes; it also provides street families, which

are defined for each land use context.

The USDM focuses on pedestrian safety by providing

narrower ROWs and travel lane widths that reduce the

interaction time between pedestrians and vehicular

traffic.

The USDM attempts to promote urban identity and

environmental sustainability within the Emirate of

Abu Dhabi. The USDM provides for high-quality urban

designs which cater for all modes of transport and

renders the urban environment a pleasant and safe

place to walk, cycle, use public transport and private

vehicles.

The design approach adopted by the USDM urges

designers to distribute the estimated travel /

trip demands over multiple streets, rather than

concentrating the traffic volumes along a main arterial

or boulevrad.

Traffic distribution is achieved by providing a greater

number of alternative travel routes, mainly through an

improved connectivity of multiple narrower streets,

instead of one wide arterial, within urban areas.

The USDM presents typical cross sections of urban

roads which are subdivided into six main contexts,

based on adjacent land use. In addition, four street

families for each land use context are provided to

satisfy transport demand.

As stated in the USDM, the typical cross sections take

into consideration the need to balance all stakeholders

requirements to design a transport facility that fits its

applicable setting.

Based on the transport demands and the stakeholders

requirements for different street families within each

context, the USDM indicates the various elements for

each street type, along with their minimum width

requirements and maximum allowable widths. Using

these criteria and the street elements dimensions,

the Right-Of-Way for each street type is established.

Chapter 1-4




The USDM represents a major departure in the design

of streets in the Emirate of Abu Dhabi for a number

of reasons. Firstly, the carriageway configurations

have been redefined to support and promote more

sustainable modes of transport such as pedestrian

walkways, cycle lanes, and mass transport facilities.

Under the new design criteria incorporated in the

USDM, the pedestrian replaces the motor vehicle as

the focal point of transport. In addition to refocusing

design criteria on pedestrian and alternative modes of

transport, the streetscape has been altered significantly

to make use of buildings to create shade for streets

and to other buildings thus improving cooling

efficiencies within buildings. This trend towards more

sustainable design has resulted in narrower ROWs. This

fundamental change in the streetscape design resulted

in the need to make equally fundamental changes to

the utility dispositions within the determined ROWs of

streets.

Moreover, because ample reservation space was

provided under the previous wide street design

solutions, utility corridors have tended to be oversized

in comparison to other countries, which were

constrained by narrower ROWs.

Chapter 1-5




For the purpose of this Manual, urban streets are all

streets within new urban developments of the Emirate of

Abu Dhabi. This Manual does not apply to rural roads and

freeways. Urban areas / developments are defined in

Plan Capital 2030, Plan Al Ain 2030, and Plan Al Gharbia

2030. With regard to installation and / or replacement

of utilities within existing urban streets, the guidelines

given in the Manual shall be adopted; however, the

location shall be dealt with on a case-by-case basis.

The approval of the design of the respective utilities

remains within the jurisdiction of the relevant

authorities / utility providers listed in Chapter 2.

This Manual shall be implemented by the Municipalities

of the different regions in the Emirate of Abu

Dhabi. All proposed deviations from the standards

and provisions contained in this Manual shall be

approved by the UPC in advance of implementation.

This Manual shall supersede and replace herewith all

portions of Authorities / utility providers standards

and guidelines pertaining to the utility corridor width

and location, which may be in conflict with material

contained herein.


This Manual provides the general guidelines and

standards for the allocation of utility corridors within

the different street families proposed by the USDM.

This Manual indicates the required pipe / cable and

chamber / manhole corridor widths for each utility

and for each street type.

Under certain instances, more than one option is

proposed for the same street type. These additional

options are included to provide more flexibility for the

designer. Typical plans and sections are presented

at the end of this Manual to illustrate the proposed

disposition for each street type and each land use

context. This Manual also provides typical utility

dispositions / details at intersections and roundabouts.

It is important to note that this Manual only covers

the standard solutions which are appropriate to

address the more common requirements. However, in

instances where special design solutions are required,

the designer needs to develop an understanding of

the applicable solutions as discussed in this Manual

in order to identify the most appropriate and effective

solutions.

The provisions of this Manual shall not dispense with

any of the design requirements and standards already

established by the authorities and utility providers

within the Emirate of Abu Dhabi, except for those

provided for utility corridor width and utility corridor

location, if these are in conflict with the standards and

guidelines established in this Manual.

All trench and chamber / manhole details shall be

in accordance with the requirements and general

details of the concerned authority / utility provider,

with the exception of those that may be in conflict

with the surface finish requirements as stated in

this Manual and / or in the USDM. Furthermore, all

installation procedures shall follow the guidelines of

the concerned authority / utility provider.


The Manual shall be applied to new urban

developments only as defined by the Plan Capital

2030, Plan Al Ain 2030, and Plan Al Gharbia 2030

framework plans. The revitalization of existing

developments will require a case-by-case study of

utility corridors, where some of the utilities shown

under the carriageway in this Manual could be located

outside the carriageway limits to avoid disruption to

traffic. However, the designer shall be guided by this

Manual and shall adopt one of the options provided,

where possible.

Chapter 1-6




This Manual provides a combination of standards

and guidelines that ensure flexible and innovative

utility corridor location and width design. Generally,

standards either mandate specific practices or

prohibit others, whereas guidelines are sets of rules

that provide flexibility in the design.

The purpose of this Manual is to define the utility

corridor location and width and NOT to define the

urban street Right-of-Way (ROW) as this will be

defined by the urban planner as per the requirements

of the USDM. The ROWs of the various streets

illustrated in the UCDM represent the minimum ROWs

necessary for utility installation, as per the minimum

street element widths defined in the USDM. However,

the planner may increase the ROW taking into

consideration the minimum and maximum widths of

the street elements given in the USDM while strictly

adhering to the widths of the various utility corridors

defined in the UCDM; under these circumstances the

location of some utilities may be altered, as discussed

in Section 4.1. Under no circumstances shall the ROW

of the streets be increased based on increasing the

utility corridor widths, except for those conditions

identified in the UCDM.

Moreover, as indicated in the USDM, some additional

public / pedestrian passages such as Sikka and

Mushtarak may be introduced within the urban

developments; under these circumstances the utilities

located under the carriageway of the streets may be

relocated to under these passages as discussed in

Section 4.1 of this Manual.

In all instances, this Manual must be applied in

conjunction with supporting documents from all

agencies having jurisdiction. Design options and

guidelines for various street types given in this Manual

are the preferred design options for utility disposition

within the urban streets of Abu Dhabi. However, the

service corridor designs presented in this Manual shall

be adopted in all instances, except in special cases

where the UPCs approval has been obtained.

Whenever a proposed design requires deviation(s)

from the set guidelines, alternative solutions shall be

presented and agreed in advance with the UPC.

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Chapter 2-2




The relevant authorities and utility providers

responsible for the various utility installations within

urban and non-urban areas in the Emirate of Abu

Dhabi include, but are not be limited to, the following:

Abu Dhabi Urban Planning Council (UPC);

Department of Municipal Affairs (DMA);

Abu Dhabi Municipality (ADM);

Al Ain Municipality (AAM);

Western Region Municipality (WRM);

Western Region Development Council (WRDC);

Eastern Region Development Council (ERDC);

Abu Dhabi Water and Electricity Authority (ADWEA);

Abu Dhabi Transmission & Despatch Company (TRANSCO)

Abu Dhabi Distribution Company (ADDC);

Al Ain Distribution Company (AADC);

Abu Dhabi Sewerage Services Company (ADSSC);

Emirates Telecommunication Corporation (Etisalat);

Emirates Integrated Telecommunications Company PJSC (du);

Abu Dhabi Gas Industries LTD (GASCO);

Dolphin Energy (DE);

Abu Dhabi National Oil Company (ADNOC);

Abu Dhabi National Oil Company for Distribution (ADNOC Distribution)

Abu Dhabi Company for Onshore Oil Operations (ADCO);

Department of Transport (DoT);

Western Region Development Council (WRDC);

General Directorate of Civil Defense (ADCD);

National Emergency and Crisis Management Authority (NECMA);

Abu Dhabi Signal Corps;

Parks and Recreation Facilities Division (PRFD);

Higher Corporation for Specialized Economic Zones, Zones Corp (ZC);

Center of Waste Management - Abu Dhabi;

General Headquarters of Abu Dhabi Police - GHQ.

The above listed authorities, utility providers and

organizations may have a direct role and / or an indirect

role in the review and approval of utility installations

and should be consulted during the various stages of

design, as applicable.

Table 2.1 lists all stakeholders that may be involved

in the review and approval of the utility installations

and summarizes their roles and responsibilities in this

regard.

Chapter 2-3



Table 2.1: Stakeholders Roles and Responsibilities

Stakeholders Category Stakeholders Role / Responsibility

Regulatory Authorities Abu Dhabi Urban Planning Council UPC

Department o`f Municipal Affairs - DMA

Abu Dhabi Municipality -ADM

Al Ain Municipality - AAM

Western Region Municipality - WRM

Western Region Development Council - WRDC

Eastern Region Development Council - ERDC

Implement the UCDM, regulate, review and approve any deviations from the guidelines provided in the Manual.

Utility Providers Abu Dhabi Water and Electricity Authority - ADWEA

Abu Dhabi Transmission & Despatch Company - TRANSCO

Abu Dhabi Distribution Company - ADDC

Al Ain Distribution Company - AADC

Abu Dhabi Sewerage Services Company - ADSSC

Emirates Telecommunication Corporation - Etisalat

Emirates Integrated Telecommunications Company PJSC - du

Abu Dhabi National Oil Company for Distribution - ADNOC Distribution

National Emergency and Crisis Management Authority - NECMA

Abu Dhabi Signal Corps

Department of Transport - DoT

Parks and Recreation Facilities Division - PRFD

Approve designs of utility reservations based on the guidelines included in the Manual

Users Higher Corporation for Specialized Economic Zones, Zones Corp - ZC

Developers

Consultants / designers

Contractors

Apply the guidelines included in the Manual so as to ensure conformance to the Abu Dhabi Urban Street Design Manual, Abu Dhabi Public Realm Manual and the Abu Dhabi Utility Corridor Design Manual.

Authorities General Directorate of Civil Defense - ADCD

Center of Waste Management - Abu Dhabi

General Headquarters of Abu Dhabi Police - GHQ

Dolphin Energy - DE

Abu Dhabi National Oil Company for Distribution - ADNOC Distribution

Abu Dhabi Company for Onshore Oil Operations - ADCO

Indirect role in implementation of the Manual. Consultation in cases where utilities may interfere with their own assets.

Chapter 2-4




The utilities considered in this Manual include all the

utilities that are currently used in the Emirate of Abu

Dhabi as well as the utilities that may be considered

in the future.

In general, the main utilities that occupy part of roads

ROWs (in addition to the clearance) can be divided into

the following two categories:

Road utilities; and

Building utilities

Road utilities include the infrastructure systems that

serve the road itself, such as stormwater drainage,

street lighting, fiber optic systems and landscape

irrigation systems.

Building utilities include infrastructure systems

that service the buildings located on the side of the

road; these include the water supply, power supply,

telecommunication system, gas network, district

cooling system and wastewater collection system.

These utilities fall under the responsibility of the

respective utility providers in conjunction with the

Municipalities.

The utilities covered by the UCDM include:

Water distribution system;

Wastewater collection system;

Landscape irrigation water supply system;

Urban stormwater drainage system;

Gas network;

Power supply, including high voltage (HV) that supplies primary substations, medium voltage (MV),

low voltage (LV);

Telecommunication network;

Fiber optic networks, including fiber optic systems to include: the DoTs (Intelligent Transportation

System: ITS), ADM-TSS (Traffic Control System:

TCS), Signal Corp, National Emergency And Crisis

Management Authority - NECMA (Falcon Eye), and

AD Police;

District Cooling Network; and

Street Lighting.

In addition to the above, allocation of corridors for trees

/ landscaping is also accounted for, and guidelines for

the arrangement of solid waste collection facilities /

bins is also provided for.


Effective management and design of utility

installations are imperative for the safe and expedient

construction and maintenance of the road network.

Close coordination with utility providers is essential to

meet these objectives.

This will necessitate that the UPC, DoT, the

Municipalities (ADM, AAM, and WRM), and the

utility companies representatives meet regularly to

exchange information to help avoid conflicts between

utility companies projects and Municipal projects,

in terms of location, construction or method of

installation of utilities within the ROW of streets.

Work within the public ROW by contractors and /

or utility companies requires proper coordination

between these companies and the authorities to

ensure appropriate utilization of the ROW. Among

the issues that need to be coordinated, public

safety, pedestrians, cyclists and drivers comfort,

aesthetics and cost-effectiveness of the implemented

reinstatement strategy are considered of utmost

importance.

Chapter 2-5



The operation and maintenance of the utilities will

benefit from efficient and effective coordination.

Inter-agency coordination during the installation and /

or operation and maintenance activities will maximize

the benefits and ensure the following:

Reduction in road maintenance costs;

Provision of smoother roads with fewer closures for maintenance / rehabilitation activities;

Provision of cost effective engineered solutions which are suitable for the local conditions;

Promotion of consistent policies which eliminate disputes among stakeholders; and

Expediting project delivery and avoidance of project delays in the preliminary engineering,

preconstruction and construction phases.

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3.1 Introduction

3.2 Design Process

3.3 Design Options

3.4 Documents to be Submitted


Chapter 3-2



3.1 Introduction

The design of utility corridors involves a thorough

understanding of the design of the new street families

and the definition of the various elements of the

streets. In addition, a comprehensive understanding of

the requirements of all utility providers and agencies

is necessary.

This understanding is required to enable the designer

to clearly define utility corridor widths and locations

based on the intended use of the street and the type

of the development to be serviced. The following

sections illustrate the design process that shall be

adopted during the application of the UCDM.

3.2 Design Process

The design process generally involves several steps

that shall be carried out in a chronological order to

execute the project objectives. The required steps are

as follows:

1. Data and information collection;

2. Conceptual design development;

3. Evaluation and review of design / obtain

preliminary approval / or rejection.

4. Finalize design; and

5. Obtain final approvals.

3.2.1 Step 1: Gather & Present Information

Prior to the initiation of the design of any development,

the designer shall issue a Notice of Intent (NOI)

requesting information on any existing utilities and /

or constraints imposed by ongoing or planned projects

in the vicinity of the development.

The design of the utilities and their related disposition

drawings will also involve the collection of all the

relevant data, standards and design guidelines

adopted by the respective utility providers, including

the UCDM.

The designer shall review the requirements of the

various authorities and utility providers prior to

initiating conceptual designs of the utility networks.

During this step it is essential that the designer agrees

on all the requirements with the respective authorities

and / or utility provider, before proceeding with

desgin.

Chapter 3-3



3.2.2 Step 2: Develop Conceptual Design

The second step involves developing the conceptual

design of the utilities taking into consideration the

planning and transportation requirements of the

development under consideration. This step involves

coordination between the planners, transport

engineers and utilities engineers in order to agree

on an optimized design of the roads and utilities that

will meet the requirements of the intended use of the

development.

3.2.3 Step 3: Evaluate & Review Design

During this step, the designer shall prepare the

necessary documentation including the basis of the

design, drawings, conceptual design calculations,

etc. and coordinate with the authorities and utility

providers. The main objective of this step is to ensure

that proposed concepts comply with the various utility

providers and authorities requirements.

The utility engineer

shall select the utility

arrangement options

defined in this Manual

which best suit the

street ROWs defined

by the urban planner

and street designer.

Once the most suitable

utility arrangement /

disposition configuration is selected, the designer

shall seek preliminary approvals for the proposed

service corridor from the Town Planning Departments

of the relevant Municipality in order to proceed with

final design.

During this step, the designer shall also obtain the

approval of the respective utility providers on the

design of utilities. In addition, the approval of the

UPC on the conceptual urban planning design of the

development shall be secured.

3.2.4 Step 4: Finalize Design

Once the preliminary approvals from the Town

Planning Department of the relevant Municipality,

utility providers and the UPC are obtained, the

designer shall proceed with finalizing the designs; in

particular, finalizing the utility disposition drawings

for the various street types within the development

in accordance with the guidelines provided in this

Manual.

1. Development of Conceptual Design

Design review and evaluation

Design, review & evaluate

Chapter 3-4



Review procedures and requirements set by the Municipalities (ADM, AAM, and WRM) with respect to the utili disposition / arrangement.

Prepare utili disposition sections and plans based on the requirements of the development taking into considera-tion the defined street ROW based on the USDM and planning requirements.

Submit utili disposi-tion plans and sections to the Municipalities for approval.

Review Municipali Requirements

Prepare Design / Utili Disposition Sections

Upon approval by Municipalities, implement any comments and submit the design drawings and documents to Utili providers for final approval.

Submit to Utili Providers

Submit for Approval

3.2.5 Step 5: Obtain Final Approvals

During this stage, the designer shall submit the

final designs to the different agencies to obtain the

final NOC and then submit the urban design of the

development, including the utility disposition designs,

to the UPC for detailed planning approval.

3.3 Design Options

The utility disposition sections provided by this Manual in

Annex A are intended to account for all utilities currently

being installed in Abu Dhabi and other utilities which are

expected to be installed in the future. In some instances

several options are provided for the same type of street;

in these instances, the designer shall select the option

that is most appropriate for the design.

Wherever some of the utilities included in the UCDM

are not required, the designer shall maintain the unused

allocated corridors as spare corridors. However, if the

spare / unused corridors are needed for other utilities,

the designer shall submit alternative proposals for

utility dispositions to the UPC for review and approval.

The designer shall abide by the required utility corridors

specified in this Manual. If the design of the roads does

not allow for a street type with a larger ROW, and if

the design of the utilities require larger corridors, the

designer shall:

Receive special approval for a wider ROW in the specified street, after submission of technical

justifications for the wider corridor requirements

(E.g.: larger pipeline diameter required based on

hydraulic calculations; number of cables; etc.); or

If the increase of ROW is critical to the development, the designer may use a utility tunnel. The general

guidelines for the design of a utility tunnel are

included in this Manual.

Chapter 3-5



3.4 Documents to be Submitted

The designer shall abide by the procedures and

requirements set by the Municipalities (ADM, AAM,

and WRM) with respect to the utility disposition /

arrangement approval, in accordance with the

requirements of this Manual. In this regard, the

designer shall submit all the required documents and

drawings including but not limited to the following:

Detailed utility disposition plans, reflecting the relative locations of the various utility corridors in

GIS format as per the UPCs GIS section - Spatial

Data Submission Specifications, and adopting an

appropriate color coding for each utility corridor.

Detailed utility disposition section in CAD format showing the location of the utilities

from the street / carriageway centerline in

millimeters or meters. A sample utility

disposition section is shown in Figure 3.1.

The submitted documents shall abide by / be in

accordance with the latest version of the Utility

Corridor Mapping Specifications published by the

Department of Municipal Affairs (DMA). Figure 3.1: Utility Disposition ArrangementAll dimensions are in mm

www.upc.gov.ae

4.1 Right-of-Ways (ROW) Determined by the Abu Dhabi Urban Street Design Manual (USDM)


4.3 Utility Installation, Operation and Maintenance


Chapter 4-2



4.1 Right-of-Ways (ROW) Determined by the Abu Dhabi Urban Street Design Manual (USDM)

The ROW defined by the Abu Dhabi Urban Street Design

Manual shall be respected by all proposed designs for

utilities. The USDM defines the various elements of

the streets and their use. The USDM defines the ROW

for the different types of streets based on the land

use context. A summary of the standard and absolute

minimum ROW for the various types of street families,

as determined by the USDM, is provided hereafter.

Different types for the same street family are included;

also, a description of the elements of each street type

is presented in Annex A.

The ROW, defined in this section for the different land

use contexts, is the absolute and standard minimum

needed for the installation of utilities. The planner

may design the streets with a wider ROW based on

the USDM, by introducing the optional elements

on the pedestrian realm or increasing the width of

certain elements as defined by the USDM. In such

instances, the utilities shown under the carriageway

may be relocated under the sidewalk. The relocation

of utilities shall be based on the following:

The telecom corridor shall have the first priority

since this utility is more frequently accessed than

the other utilities placed under the carriageway;

The second priority shall be given to the district cooling system, if required;

The third priority shall be given to the gas system provided the minimum safe distance from the plot

boundary (as per the utility provider requirements)

is satisfied; and

The wastewater corridor shall be the fourth priority, followed by the stormwater drainage corridor.

In addition to the street families described herein,

the USDM introduces additional public / pedestrian

passages within developments, namely the mushtarak

and sikka.

In instances where a mushtarak or a sikka is introduced

as a parallel passage to one of the street families, and

is adjacent to the plot from the rear, the designer may

relocate the utilities proposed under the carriageway

to the mushtarak or sikka at the rear, provided the

mushtarak or sikka does not run parallel to a primary

electrical substation. A mushtarak or a sikka running

parallel to a primary electrical substation shall have

the priority for accommodating the power cables

originating from the primary electrical substation.

Priority for relocating utilities from the carriageway to

the mushtarak or sikka shall be given to the telecom,

district cooling system, gas system and wastewater

corridor in the same order. Subject to the previously

stated conditions, the stormwater corridor shall be

provided in the carriageway and in the mushtarak or

sikka.

Alternative Location for Services

Front Street Mushtarak / Sikka

Utilities within carriageway of front street, could

be relocated to Mushtarak or Sikka

Chapter 4-3



City Context

Within a city context, the USDM defines the

development as mixed-use central business districts

(CBD) having high-density neighborhoods and a high

level of pedestrian activities. In this landuse context,

buildings are typically seven storeys or higher. The

ROW of streets within the city context land use is

given in Table 4.1.

An access lane within this context is defined as a

service road from the rear of buildings intended

for garage / parking access as well as for garbage

collection and other building services / maintenance

operations.

Town Context

Within a town context, the USDM defines development

as mixed-use areas with medium levels of pedestrian

activity, where buildings are typically three to six

storeys. The ROW of streets for this land use context is

given in Table 4.2. Similar to the city context, an access

lane within this context is defined as a service road.

Commercial Context

The USDM defines the commercial context as areas

throughout the city intended to provide a variety

of working, shopping and service options and

convenience. An access lane within this context is

defined as a service road, similar to the town and city

contexts.

The ROW, as defined in the USDM based on the

absolute minimum allowance for the various street

elements, for this land use context is given in Table

4.3. Variations from the absolute minimum definitions

given in the USDM are considered in determining the

ROW of the various street families; these are clarified

in Annex A.Table 4.1: City Context Street ROWStreet Family

ROW

A

bsol

ute

Min

imum

Ty

pe 1

/1A

(m)

ROW

S

tand

ard

Min

imum

(T

ype

2) (

m)

ROW

S

tand

ard

Min

imum

(T

ype

3) (m

)

Boulevard without frontage 34.50 / 41.00

45.00 -

Boulevard with frontage 49.80 - -

Avenue without frontage 27.30 34.20 38.50

Avenue with frontage 41.30 - -

Street 17.20 21.40 25.40

Access lane 11.30 - -

Table 4.2: Town Context Street ROW

Street Family

ROW

A

bsol

ute

M

inim

um T

ype

1 /

1A

(m)

ROW

S

tand

ard

Min

imum

(Typ

e 2)

(m)

ROW

S

tand

ard

Min

imum

(Ty

pe 3

) (m

)

Boulevard without frontage 33.70 / 40.50 42.20 -




Street 17.20 20.20 24.60


Town Context

Commercial Context

Chapter 4-4



Residential Context

Within a residential context, the USDM defines

the development as areas that provide a variety of

housing opportunities, allowing for densities varying

from villas to multi-dwelling residential buildings. The

ROW for this land use context is given in Table 4.4.

The access lane in a residential context is intended to

provide vehicular access to villas and multi-dwelling

residential buildings. Based on this definition of the

access lane, all villas and residential buildings bound

by an access lane will be serviced by utilities from the

access lane.

Industrial Context

Within an industrial context, the USDM defines the

development as areas for businesses that have

potential to create adverse visual or other impacts

to adjoining public and residential properties. Uses

include light industries such as warehousing and

distribution with support commercial services and

ancillary office space. This context however, does not

include heavy industry zones, since such land uses

may require wider ROWs, wider travel lanes and in

particular special types / capacities of utilities. Heavy

industry zones will be treated on a case-by-case basis.

Nevertheless, it is expected that trucks will make up a

larger proportion of vehicles in the industrial context.

The ROW for this land use context is based on the

absolute minimum requirements of the USDM is given in

Table 4.5. The designer shall define the ROW for streets

within this context based on USDM requirements and is

allowed to increase the travel lane width; however, the

utility corridors within this context shall be as defined

in this Manual.

Table 4.3: Commercial Context Street ROW

Street Family

ROW

A

bsol

ute

M

inim

um T

ype

1 /

1A (m

)

ROW

S

tand

ard

Min

imum

(Typ

e 2)

(m)

ROW

S

tand

ard

Min

imum

(Ty

pe 3

) (m

)

Boulevard without frontage 33.70/ 40.50

44.60 -




Street 17.20 20.20 24.60


Table 4.4: Residential Context Street ROW

Street Family

ROW

A

bsol

ute

M

inim

um T

ype

1 /

1A

(m

)

ROW

S

tand

ard

Min

imum

(Typ

e 2)

(m)

ROW

S

tand

ard

Min

imum

(Ty

pe 3

) (m

)


43.10 -




Street 15.50 18.80 23.80


Residential Context

Chapter 4-5



Emirati Neighborhood Context

For the purposes of utility disposition and the UCDM,

a variation from the residential context was created,

namely the Emirati neighborhood context. Within this

context the ROW is similar to those of the residential

context, with the exception of the access lane street

type. In this context, special access lane types have

been defined and are desgined to meet the special

requirements within an Emirati neighborhood. Three

types of access lanes are introduced; the designer

shall select the most suitable for utility disposition /

arrangement based on the allocated ROW. The ROW

for the various street types within this context is given

in Table 4.6.

Table 4.5: Industrial Context Street ROW

Street Family

ROW

A

bsol

ute

M

inim

um T

ype

1 /

1A (m

)

ROW

S

tand

ard

Min

imum

(Typ

e 2)

(m)

ROW

S

tand

ard

Min

imum

(Ty

pe 3

) (m

)

Boulevard without frontage 32.50/ 39.40

44.00 -




Street 18.30 21.60 26.40


Table 4.6: Emirati Neighborhood Context Street ROW

Street Family

ROW

A

bsol

ute

M

inim

um T

ype

1 /

1A

(m

)

ROW

- S

tand

ard

Min

imum

(Typ

e 2)

(m)

ROW

- S

tand

ard

Min

imum

(Typ

e 3)

(m)


43.10 -




Street 15.50 18.80 23.80

Access lane 13.90 15.70 18.30

Industrial Context

Emirati Neighborhood

Chapter 4-6




Several factors affect the design of utility corridors. Some factors might differ

depending on the utility in question; however, many factors are common and

govern the design of corridors for almost any utility. Moreover, factors are divided

into two major categories; factors which govern the corridor in terms of its width,

and factors which govern the corridor in terms of its location.

The required corridor widths are normally governed by the minimum width

needed to properly install the utility and this comprises proper excavation, laying,

backfilling, compaction and reinstatement. The corridor width is also governed by

the size / width of the associated chambers and manholes that are installed along

the corridor.

Other factors also include operation and maintenance, repair and replacement

requirements.

Factors governing the location of the corridor include clearance requirements from

other utilities (mainly applicable between water and wastewater / treated sewage

effluent (TSE)), clearance requirements from plot limits and connections to plots

and inspection chambers, in addition to public safety considerations.

Other important considerations in locating utilities are the factors which govern

whether a utility can be installed under the carriageway or whether it should be

placed under the sidewalk.

Utilities which require frequent access should not be placed under the carriageway

because operation and maintenance requirements may cause frequent traffic

interruptions and frequent asphalt cutting and repairs.

Also, pressurized pipes such as water and irrigation water supply pipes might

cause significant damage to asphalted roads if pipe failure occurs; consequently,

these utilities are normally placed under sidewalks and / or block paved surfaces.

The utilities that can be accessed for repair through manholes are selected to be

installed under the travel lanes / carriageway.

In order to reduce the width of the ROW and optimize the location of each

utility corridor width, the design of the utility corridors shall adopt the concept

of staggering, whereby appurtenances (chambers and manholes) are allowed to

extend beyond the corridor limits to a shared corridor between adjacent utilities.

Chapter 4-7



However in all instances, the encroachment shall respect the minimum clearance

from the utility pipe / cable and accordingly, no encroachment on the pipe / cable

corridor shall be allowed. This is mainly applicable to utilities which require a wider

corridor at the locations of the appurtenances / chambers.

Thus, a shared corridor is created between adjacent utilities to accommodate the

appurtenances of the utilities. Each utility shall have a dedicated corridor that

accommodates the minimum pipe / cable requirements, referred to as the pipe /

cable corridor.

In addition, minimum clearance of 1.0m shall be maintained between the plot

boundary and the first utility adjacent to it. Clearance next to the plot boundary

shall be used for the installation of inspection chambers / house connections.

Consequently, the plot boundary wall foundation shall not be allowed to extend

beyond the plot boundary limit into the ROW.

All utilities shall be installed up to the plot boundary limit, whereby the pipe and /

or cable shall be extended to the inspection chamber, valve box, etc. near the plot

boundary.

For utilities installed on one side of the ROW or under the carriageway, ducts for

utility crossing to the opposite plot shall be installed at the same time the primary

system is installed within the ROW.

SIDEWALK

DEDICATED CORRIDOR SHARED CORRIDOR

SIDEWALKTRAVEL LANES (ASPHALT) PARKING LANES(BLOCK PAVED)

Chapter 4-8



4.2.1 Water Supply Corridor

Two criteria govern the required corridor width for the

water supply network. The first is the pipe corridor

width determined by the pipe size / diameter, and

the second is the chamber corridor width, which

is determined by the width of appurtenance(s) /

chambers. While the former dictates the minimum

width to house the pipe, the latter is normally required

to house the outer width / dimension of the chambers

/ manholes, as required.

In general, the fire fighting network is combined

with the potable water network. In instances where

a dedicated ring main is required for the fire fighting

network to ensure the minimum required residual

pressure at the hydrants, the ROW under the sidewalk

shall be increased to accommodate fire fighting pipes

subject to UPC approval.

4.2.1.1 Water Supply Pipe Corridor Width Requirements

Pipe corridor width requirements are based on the

pipe material and / or pipe diameter. Pipe diameters

vary depending on the land use context as well as the

street type, as larger streets are expected to contain

larger pipes.

Minimum pipe corridor width requirements were

estimated based on best practice procedures in Abu

Dhabi Emirate, the requirements for different pipe

diameters are shown in Table 4.7.

4.2.1.2 Water Supply Appurtenances

In addition to isolation valve chambers, water

networks comprise other chambers / appurtenances

including washout valve chambers, air vent chambers,

flow meter chambers, sector meter chambers, fire

hydrants and several others.

All details shall be in accordance with ADWEA /

TRANSCO / ADDC / AADC standards and typical details.

External chamber dimensions shall be limited to 1.5m

for all pipes with diameters less than or equal to

300mm and shall not exceed 2.2m, for pipe diameters

between 300mm and 600mm, and 2.7m for larger

diameters, as shown on the typical sections in Annex

A.

For valve chambers at intersecting pipes, it is

recommended to utilize chambers for single valve

installation so as to reduce the chamber dimensions.

In instances where two valves are installed at a T

connection, it is recommended that the valves are

installed in separate chambers before the street

intersection. However if a common chamber for the

valves is to be used, the chamber shall be allowed to

encroach on the adjacent clearance corridor from the

plot boundary.

Table 4.7: Water Supply Pipe Corridor Requirements

Pipe Diameter (mm) Pipe Corridor Width (mm)

150 500

200 600

300 700

400 1000

500 1200

600 1300

700 1400

800 1500

900 1600

1000 1800

Chapter 4-9



4.2.1.3 Water Supply Chamber Corridor

The minimum chamber corridor width shall be equal

to the width of the largest chamber required for the

pipe installed and shall at no point be less than the

required pipe corridor width.

In instances where the street ROW is limited, the

chambers shall be allowed to encroach on the corridor

of the adjacent utility provided the pipe corridor width

of the adjacent utility is maintained.

Based on the same principle, chambers /

appurtenances of adjacent utilities shall be allowed to

encroach on the water chamber corridor provided the

required pipe corridor width is maintained.

The standard minimum pipe and chamber corridor

widths required for the water pipes for the different

street families are presented in Table 4.8.

In some instances where the ROW is limited, and

taking into consideration the land use context and

expected demands, absolute minimum pipe and

chamber corridor widths are also estimated and are

included in Table 4.8 between parentheses.

4.2.1.4 Water Supply Special Arrangements

Although the corridor allocations, as summarized

in Table 4.8, can accommodate most water

appurtenances, a few specific appurtenances /

chambers might require special arrangements /

considerations. Accordingly, the designer shall provide

the necessary allocations within the development

plan outside the ROW of the streets (away from

footpaths and the furnishing zone) for the following

appurtenances, whenever required:

District Meters (DMS) shall be installed in open areas. In instances where the DMS need to be installed

within the street ROW, a localized widening of the

street ROW can be considered;

Bulk connections shall be placed within the plot boundary while providing accessibility to ADWEA /

ADDC / AADC staff;

Washout chambers shall be installed, whenever possible, within parks and open spaces;

Fire hydrants shall be installed within the tree corridor; and

Flow meters shall be installed within buildings plots.

In addition, TRANSCO water lines shall be accounted

for by the designer as per TRANSCO water corridor

requirements, independently of the above required

water corridors.

TRANSCO water corridors shall be installed based on

one of the following guidelines after securing UPC

approval on the approach adopted:

Increasing the ROW of the street where a TRANSCO water main is installed; or

Introducing within the development a dedicated corridor for the TRANSCO water main.

Table 4.8: Water Supply Corridor Allocation

Street Family Side 1 Side 2

Pipe

Cor

rido

r W

idth

(m)

Cham

ber

Corr

idor

W

idth

(m)

Pipe

Cor

rido

r W

idth

(m)

Cham

ber

Corr

idor

W

idth

(m)

Access lane 1.0 1.5 1.0 1.5

Street 1.0 1.5 1.0 1.5

Avenue 1.0 1.5 1.3 (1.0)

2.2 (1.5)

Boulevard 1.0 1.5 1.8 (1.3)

2.7 (2.2)

(x) Indicates the absolute minimum pipe and chamber corridor width

Chapter 4-10



4.2.1.5 Water Supply System Pipe Depth

The depth of the water supply system shall be in

accordance with the requirements of ADDC / AADC.

The minimum depths for water pipes are shown in

Annex A.

The designer shall take into consideration varying the

depth of water pipes so as to allow for the vertical

clearance of pipe and other utilities, in particular at

intersections and for house connection installation.

In all instances, the water pipe shall be installed above

wastewater and irrigation pipes with a minimum

vertical clearance of 300mm. In the case where an

irrigation line or a wastewater line crosses over a

water pipeline, all pipes shall be encased in concrete

or installed within a sleeve.

4.2.1.6 Location of the Water Corridor

The first corridor after the clearance from the plot

boundary, shall always be reserved for the water lines

on both sides of the street. Whenever valve chambers

are required, the chambers are allowed to encroach

on the clearance from the plot boundary.

Whenever the corridor width for the primary main is not

sufficient for the construction of the appurtenances,

the chambers are allowed to encroach on adjacent

utility corridors provided the encroachment does not

extend into the pipe / cable corridor reservation of the

adjacent utility.

Similarly, adjacent utility appurtenances are allowed

to encroach on the water supply main corridor,

provided that such encroachment does not extend

into the water main pipe corridor.

A minimum clear distance of 1.0m shall be maintained

between the water corridor and any wastewater or

irrigation / TSE corridor. This distance can be reduced

to 0.8m if a third utility separates the water from the

sewer and / or irrigation lines.

Chapter 4-11



4.2.2 Wastewater Collection Corridor

Similar to the water supply system, two criteria

dictate the required corridor width for the wastewater

collection network. The first is the pipe corridor width

as determined by the pipe diameter, and the second

is the manhole width / diameter. While the former

imposes the minimum width required for the whole

length of the corridor, the latter is normally required

at connections and changes in direction or slopes at

manhole locations.

4.2.2.1 Wastewater Pipe Corridor Width Requirements

Pipe corridor width requirements are generally based

on pipe diameters. The required pipe diameter varies

depending on the wastewater flow which in turn

depends on the land use context as well as the street

type.

In general, larger pipes are expected to run within the

wider roads. The pipe corridor width requirements for

the different pipe diameters are shown in Table 4.9.

4.2.2.2 Wastewater Manholes

Manhole dimensions and details shall be in

accordance with ADSSCs standards and typical

details. Accordingly, manhole dimensions are limited

to 2.0m for all pipes less than 500mm in diameter,

2.8m for all pipes between 500mm and 900mm in

diameter and 3.2m for larger pipe diameters. In some

locations the manhole dimension might be 4.0m so as

to accommodate manholes for pipes with diameters

larger than 1400mm.

4.2.2.3 Wastewater Pipe Depth

The minimum depth of the wastewater pipe shall be

in accordance with the requirements of ADSSC, and

as per the design requirements . The minimum depth

of wastewater pipes are shown on the typical sections

in Annex A.

In all instances, the wastewater pipe shall be installed

below water pipes with a minimum vertical clearance

of 300mm in accordance with utility providers

requirements. In the case where a wastewater pipe

crosses over a water pipeline, especially at house

connections, all pipes shall be encased in concrete or

installed within a sleeve.

Table 4.9: Wastewater Pipe Corridor Requirements


200 500

300 600

400 800

500 930

600 1050

700 1180

800 1300

1000 1550

1200 1800

1400 2050

1600 2300

Manhole Ring Installation

Chapter 4-12



4.2.2.4 Wastewater Corridor

The minimum corridor width shall be equal to the

width / diameter of the largest manhole along the pipe

and shall at no point be less than the required pipe

corridor width.


manholes shall be allowed to encroach on the

adjacent space, which is defined as a shared corridor

between adjacent utilities. The shared corridor shall

under no circumstances extend into the dedicated

pipe / cable corridor of the adjacent utility. Based

on the same principle, chambers / appurtenances

of adjacent utilities shall be allowed to encroach on

the wastewater corridor provided the required pipe

corridor width for wastewater pipes is maintained.

The standard minimum pipe and manhole corridor

widths required for the wastewater system for the

different street families are presented in Table 4.10.

In some instances where the ROW is limited, and

taking into consideration the land use context and

expected discharges from the various buildings /

dwellings along the streets, the pipe and manhole

corridor widths may be eliminated as shown in Table

4.10 between parentheses.

4.2.2.5 Location of the Wastewater Corridor

A minimum clearance of 1.0m shall be maintained

between the wastewater corridor and any potable

water corridors. This distance can be reduced to 0.8m

if a third utility separates the two corridors.

Wastewater corridors shall be allowed under the

carriageway wherever placement under the sidewalk

and / or block paved surfaces is not possible.

4.2.2.6 Wastewater Force Mains

Wastewater force mains shall be installed in

accordance with ADSSC requirements. Based on the

design of the wastewater system, the force main shall

be installed within a dedicated corridor under the

sidewalk in accordance with ADSSC corridor widths

for force main requirements. The designer shall

submit the proposed increase in the ROW, supported

by justification and necessary documentation, to the

UPC for approval.

Table 4.10: Wastewater Corridor Allocation


Pipe

Cor

rido

r W

idth

(m)

Man

hole

Cor

rido

r W

idth

(m)

Pipe

Cor

rido

r W

idth

(m)

Man

hole

Cor

rido

r W

idth

(m)

Access lane 1.05 2.00 - -

Street 1.05 (0.0)

2.00 (0.0)

1.05 2.00

Avenue* 1.05 2.00 1.55 2.80

Boulevard 1.05 2.00 1.55 2.80

* Larger corridors are given for the main sewer line when possible.

(x) Indicates the absolute minimum pipe and manhole corridor width

Chapter 4-13



4.2.3 Irrigation / TSE

As is the case for water and wastewater, the same

two criteria dictate the required corridor width for

the primary irrigation water supply network. These

are the pipe corridor width and the dimensions of the

appurtenance(s). The minimum corridor width shall

be that imposed by the pipe corridor requirements

which is determined by the pipe diameter. The

maximum corridor width allowed is based on the

outer dimensions of the appurtenances / chambers

used for irrigation systems.

4.2.3.1 Irrigation Pipe Corridor Width Requirements

Pipe corridor width requirements are based on the

pipe material and / or pipe diameter. Generally,

irrigation pipes are either ductile iron pipes, PVC or

HDPE pipes. Irrigation pipe diameters vary depending

on the landscape scheme which may vary from one

land use context to another. Since irrigation systems

within urban areas are generally decentralized, the

maximum pipe diameter of these systems should not

exceed 600mm.

This Manual provides corridors for larger diameters

to provide flexibility for the designer in providing

a primary supply / transmission main through the

development. The larger corridors are only permitted

on wider streets or in open spaces. The pipe corridor

width requirements for the different pipe diameters

are shown in Table 4.11.

4.2.3.2 Irrigation Appurtenances

Irrigation system appurtenances mainly include

isolation valve chambers. However, other types may

be used on primary supply mains, such as washout

valve chambers, and air vent chambers.

All details shall be in accordance with Municipality and

PRFD standards and typical details, with the exception

of surface finishes, which shall be in accordance

with the requirements of the USDM and Public Realm

Manual. External chamber dimensions shall be limited

to 1.5m for all pipes with diameters less than or

equal to 300mm and shall not exceed 2.2m for larger

diameters.

For valve chambers on the main line at intersecting

pipes, the chamber shall be designed for single valve

installation so as to reduce the chamber dimensions.

In instances where two valves shall be installed at a T

connection, each valve shall be installed in a separate

chamber before the street intersection.

Table 4.11: Irrigation System Pipe Corridor Requirements


150 500

200 550

300 680

400 1000

500 1200

600 1300

700 1400

800 1500

900 1600

1000 1800

Chapter 4-14



4.2.3.3 Irrigation Corridor

The minimum primary irrigation corridor width shall

be equal to the width required for the pipe installation.

The maximum allowed corridor width is determined by

the outer dimensions of the largest chamber required

for the pipe to be installed.


irrigation chambers shall be allowed to encroach

on the corridor of the adjacent utility provided the

pipe / cable corridor width of the adjacent utility is

maintained.

In most cases, the irrigation chamber is allowed to

encroach on the tree corridor or the stormwater inlet

corridor. Based on the same principles outlined for

other utilities, chambers / appurtenances of adjacent

utilities shall be allowed to encroach on the irrigation

corridor provided the required pipe corridor width is

maintained. The pipe and chamber corridor widths

required for the primary irrigation system for the

different street families are presented in Table 4.12.

The number of irrigation corridors per street is

determined by the number of tree corridors required.

With regard to secondary supply lines, these shall be

installed above the irrigation pipe within the same

corridor.

4.2.3.4 Irrigation Pipe Depth

The depth of irrigation pipes shall be in accordance

with the requirements of ADSSC / PRFD. The

minimum depth of irrigation pipes are shown on the

typical sections included in Annex A. In all instances,

the irrigation pipe shall be installed below water pipes

with a minimum vertical clearance of 300mm. In

cases where an irrigation pipe crosses over a water

pipeline, especially at house connections and at

intersections, all pipes shall be encased in concrete or

installed within a sleeve.

4.2.3.5 Special Arrangements

Although the foregoing corridor requirements can

accommodate most irrigation appurtenances, a few

appurtenances / chambers might require special

arrangements / considerations, such as washout

chambers.

It is recommended that such chambers be installed,

whenever possible, within parks, landscaped areas

and open spaces.

4.2.3.6 Location of the Irrigation System Corridor

A minimum clear distance of 1.0m shall be maintained

between the irrigation / TSE corridor and any potable

water corridor. This distance can be reduced to 0.8m

if a third utility separates the water from the irrigation

/ TSE corridor.

Irrigation corridors shall not be allowed under the

carriageway unless there is no available space under

the sidewalk and / or block paved surfaces. However, it

is preferable to place the corridor as close as possible

to any landscaping strip / tree corridors.

Table 4.12: Irrigation System Corridor Allocation

Street Family Side 1 Middle Side 2

Pipe

Cor

rido

r W

idth

(m)

Cham

ber

Corr

idor

W

idth

(m)

Pipe

Cor

rido

r W

idth

(m)

Cham

ber

Corr

idor

W

idth

(m)

Pipe

Cor

rido

r W

idth

(m)

Cham

ber

Corr

idor

W

idth

(m)

Access lane 0.7 0.7 - - - -

Street 0.7 0.7 - - 0.7 0.7

Avenue 0.7 0.7 1.1 (0.7)

2.0 (0.7)

0.7 0.7

Boulevard 1.3 (0.9)

2.2 (1.9)

0.7 0.7 0.7 0.7

Irrigation system corridor shall be provided only when a tree or landscaped strip is part of the street elements. (x) Indicates the absolute minimum pipe and chamber and corridor width

Chapter 4-15



4.2.4 Stormwater Drainage

The corridor widths for the stormwater collection

system are also determined by the requirements for

pipe and appurtenance / manhole installation. The pipe

corridor width is determined by the pipe diameters,

whereas the manhole corridor is determined by the

outer dimensions of the storm inlet and / or the outer

dimensions of the manholes.

Manhole dimensions are defined as the width of

rectangular manholes and the diameter for circular

manholes.

The pipe size defines the minimum pipe corridor width

required for the whole length of the corridor, and the

manhole dimensions define the manhole corridor.

In addition to the corridor(s) required for the

stormwater collection pipe, corridor(s) for the

stormwater inlets shall also be allocated. As such,

this Manual distinguishes between stormwater inlet

corridors and stormwater collection corridors.

For access lanes, due to space restrictions, a combined

corridor for the stormwater collection pipe and the

stormwater inlet shall be used.

The designer shall consider the option of eliminating

the stormwater inlet / pipe within access lanes and

use surface drainage to receiving / intersecting

streets, where deemed appropriate.

Utility corridor options illustrating these instances

are shown in the utility corridor disposition details /

sections included in this Manual.

The designer may use swales for the stormwater

drainage within the pedestrian zone / sidewalks. In

such instances, the swale location shall not obstruct

pedestrian and / or cyclists movement. The swale

could be located above utilities, in coordination with

the concerned utility provider.

4.2.4.1 Stormwater Drainage Pipe Corridor Width Requirements

Pipe corridor width requirements are generally

determined by the minimum requirements for pipe

installation and hence depend on the pipe diameter

and the type of soil.

Pipe diameters vary depending on the street type and

its ROW since in general, stormwater is drained from

smaller streets to larger streets provided the grading

allows for such gravity flows.

The designer is encouraged in all instances to adopt

such a concept in order to optimize the stormwater

corridor width. The pipe corridor width requirements

for the different pipe diameters are shown in

Table 4.13.

4.2.4.2 Stormwater Drainage Manholes

Manhole dimensions and details shall be in accordance

with ADM / PRFD / AAM / WRM standards and typical

details. However, the surface finish shall be in

accordance with the requirements of the USDM and

the Public Realm Manual.

Table 4.13: Stormwater Drainage Pipe Corridor Requirements


200 500

300 600

400 800

500 930

600 1050

700 1180

800 1300

900 1400

1000 1550

1200 1800

1400 2050

1600 2300

1800 2550

2000 2800

Chapter 4-16



According to the applicable / current standards,

manhole dimensions are generally limited by 2.5m for

all pipes less than 900mm in diameter and 3.0m for

larger pipe diameters.

4.2.4.3 Stormwater Drainage Pipe Depth

The depth of stormwater drainage pipes shall

be in accordance with the requirements of the

Municipalities, as well as design requirements.

The typical sections included in Annex A indicate

the minimum depth requirements for stormwater

drainage pipes.

4.2.4.4 Stormwater Drainage Corridor

The stormwater corridor width shall be the greater of

the width / diameter of the largest manhole along the

pipe or the required pipe corridor width.


stormwater manholes shall be allowed to encroach on

the corridor of the adjacent utility, provided the pipe /

cable corridor of the adjacent utility is maintained.

Similar to other utilities, chambers / appurtenances

of adjacent utilities shall be allowed to encroach on

the stormwater corridor provided the required pipe

corridor width is maintained.

Stormwater inlet corridors shall have a width of 1.0m,

except on access lanes, where the width can be

decreased to 0.75m, subject to space limitations.

The pipe and manhole corridor widths required for the

stormwater pipes for the different street families are

presented in Table 4.14.

4.2.4.5 Location of the Stormwater Corridor

Stormwater inlet corridors shall be located at the edge

/ curb of the sidewalk.

Two types of storm inlets shall be used depending on

the location of these inlets; these are either curb inlets

or gullies.

The main stormwater pipe corridor shall be located

under the carriageway, as shown in the proposed

utility disposition drawings.

In instances where the majority of the stormwater

drainage pipes are installed with depths less than

900mm, the location of the storm water pipes may be

shifted under the sidewalk subject to UPC approval.

In instances where a subsurface drainage system is

needed to lower the groundwater table, the system

shall be located within the same corridor allowed for

the main stormwater pipe.

Table 4.14: Stormwater Drainage Corridor Allocation


Pipe

Cor

rido

r W

idth

(m)

Man

hole

Cor

rido

r W

idth

(m)

Pipe

Cor

rido

r W

idth

(m)

Man

hole

Cor

rido

r W

idth

(m)

Access lane 1.05 (0.75)

2.0 (0.75)

- -

Street 1.50 (1.05)

2.30 (2.0)

- -

Avenue 2.50 (1.05)

2.50 (2.0)

- -

Boulevard 3.00 (2.80)

3.00 (2.80)

1.50 2.30

In addition to the above, 1m corridor(s) shall be allocated for stormwater inlets depending on road side slopes, as shown in the sections. When pipe corridor width is the same as manhole corridor width, the indicated dimension includes for both pipe or manhole corridors. (x) Indicates the absolute minimum pipe and manhole corridor width

Chapter 4-17



4.2.5 District Cooling

The corridor requirements for the district cooling

system (DCS) are defined as a function of the

supply / return pipe arrangement and the valve

chamber dimensions. The pipe arrangement defines

the minimum pipe corridor width, and the outer

dimensions of the valve chamber define the chamber

corridor width.

4.2.5.1 District Cooling Pipe Corridor Width Requirements

Normally, DCS pipe corridors are expected to house

two district cooling pipes (one for supply and one for

return). Pipe corridor width requirements are based

on the diameters of the pipes which in turn vary

depending on the land use context as well as the

street type.

Spacing between the supply and return pipes shall be

300mm. Also, a 300mm spacing shall be maintained

between the pipes and the trench walls in addition to

the insulation width of 50mm for pipes with diameters

less than 16 (400mm) and 75mm for pipes with

diameters equal to or greater than 1