SHALLOW UTILITIES JOINT PROVISIONING GUIDELINES SCOPE

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AN INFORMATION GUIDE

Joint Provisioning Guidelines for Shallow Utility Services in Residential Areas where the Electric, Gas, Telephone & Cable TV facilities are Buried in the same

Trench in the City of Calgary

SCOPE

ENMAX Power Corporation, ATCO Gas, SHAW Cablesystems and TELUS Communications underground residential distribution (URD) facilities in new subdivisions (for single-detached and semi-detached dwellings) are in a common trench in the City of Calgary.

This pamphlet provides guidelines for developers and home builders regarding the provisioning of those shallow utility facilities.

It provides information on:  Who is responsible for what  The process

 Main and Service trench configurations

 Utility wall configurations  Minimum clearances of gas

meter from windows, vents, etc.

CONTACT

John Thiessen

Tel: (403) 514-2070

Email: [email protected]

PROJECT MANAGER

The four shallow utilities have entered into an agreement with ENMAX Power Services

Corporation as the 4-Party Project Management Consultant responsible for carrying out the work for URD main trench joint use construction on their behalf.

ENMAX Power Services currently contracts its survey, construction and civil inspection activities to subcontractors.

JOINT PROVISIONING BENEFITS

For the Utilities:

 Safer product; cost reduction  Reduced damages during initial

construction and installation  Gas workers do not have to

work around energized power cables

 More accurate facility locates For the Developers and Builders:  Faster service

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URD Main Trench Joint Provisioning Process

Scheduling Construction Administration

Design Developer submits subdivision plans to shallow utilities

Shallow utility planners send designs / quotes

to Developer Developer approves designs / quotes Utilities issue work packages to the Project Manager No Yes Project Manager schedules construction work To Construction Process Project Manager confirms project site ready date

Project Manager conducts pre-construction meeting Construction Contractor completes trench construction Construction Contractor completes utility facility placement To Administration Process Project Manager conducts post-construction meeting Project Manager allocates costs to the utilities Project Manager receives Construction Contractor invoice Project Manager pays Construction Contractor Project Manager issues invoices to the Utilities and Developer

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DEVELOPER INFORMATION

To start the URD provisioning process, the Developer provides the following information and plans to ENMAX Power and the other shallow utilities:

 Two copies of the subdivision tentative legal plan

 An autocad diskette with the subdivision digital information  Easement plan

 Deep utility plans  Sidewalk cover sheet  Overland drainage plan  Shallow utilities plan  Driveway plan  Grade plan

 Indication of the size of the electrical services

(i.e. 100A or 200A)

 Indication of extra electrical coil length where required

(i.e. more than 25m)  Tentative in-service date

PROJECT & SITE READY DATE

The project is ready for construction of the shallow utility infrastructure when the following criteria are met:  Developer’s Consultant has

approved all shallow utility final designs, and the plans have been received by the 4-Party Project Manager

 Deep services are completed  Site is within 150mm of final

grade

 Developer’s Consultant requests start (option of shallow utility construction before or after surface improvements)

 Developer has met all required shallow utility financial

obligations

Any significant Developer-initiated revisions to the approved final shallow utility designs will be chargeable to the Developer, and may result in the project losing its position in the construction queue. In the event that frozen ground conditions are encountered, the Developer is required to provide the equivalent of frost-free conditions for the installation of the shallow utility infrastructure.

CONSTRUCTION OBJECTIVES

It is expected that the construction of the shallow utility (mains)

infrastructure will be completed within a six-week window after the project site ready date.

The site is then available for commencement of house building and the provisioning of the shallow utility service lines to the dwelling. The Developer is responsible for any incremental costs within the six-week window caused by early building starts, obstructions in the utility rights-of-way, etc. The shallow utilities will be responsible for the above incremental costs in the event that the shallow utility construction extends beyond the six-week window.

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URD SERVICE TRENCH STANDARDS & RESPONSIBILITES

Service Trench Standards  Minimum depth of 1 metre

below grade level from the service stub out to the foundation excavation, then angled down to the foundation footing level

 The electric, telephone and cable TV cables are to be

placed in rigid conduit of 2 inch, ¾ inch and ¾ inch minimum respectively, and the gas line will be placed in a ¾ inch sleeve; all of which are to rest on the foundation footings at the point where the vertical risers extend to the meter or service connection locations

 Conduits are to be sealed at the easement end, and vented at the house

 A 30 cm separation is

maintained between the gas line and the cables from the stub out location at the edge of the easement up to the base of the foundation; the conduits may be bundled together along the foundation for added strength and protection

 Service trench is to be backfilled with good earth backfill to grade level

Service Trench Responsibilities  Builder’s contractor excavates

the service trench from the house to the service stub-out at the easement

 Builder’s electrical contractor installs the electric and

telephone conduits, and installs the electric cable in the electric conduit

 TELUS installs the telephone cable in the telephone conduit  SHAW’s contractor installs the

cable TV conduit and cable  ATCO Gas’ contractor installs

the sleeved gas line facility  Builder’s contractor backfills the

service trench

Service Connection Responsibilities  ENMAX crew installs the

electrical meter and energizes the service

 ATCO Gas’ contractor installs the gas meter

 TELUS crew installs the telephone service connection  SHAW crew installs the cable

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URD SERVICE TRENCH CONFIGURATION P C T G

Service Trench

Configuration

(Down to Footings)

M

ain

_T

ren

_ch

Electric,

Telephone

& Cable TV

Cables

Gas Line

Service

Stubs

Meters &

Service

Connections

Foundation

Excavation

Bundled Conduits

Resting on the

Foundation Footings

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G T C P 700 mm 250 mm 200 mm 400 mm 1600 mm to 1800 mm 16 in 30 in 10 in 8 in 5 ft to 6 ft

Utility Wall

(Gas Meter on Left Side)

(Minimum Distances)

(To Service Trench)

Base Plate

Grade Level

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C T P G 400 mm 16 in 1600 mm to 1800 mm 5 ft to 6 ft 300 mm 250 mm 200 mm 8 in 10 in 12 in

Utility Wall

(Gas Meter on Right Side)

(Minimum Distances)

(To Service Trench)

Base Plate

Grade Level

Foundation Footing

Note: Please contact ATCO Gas if this layout does not meet the Builder’s needs.

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