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Section 7 : Utility Services

Utility services are components of the basic infrastructure. The planning of their provision should be integrated into the overall planning of new development areas such that the efforts between various government departments and utility companies can be co-ordinated. 

Their planning standards are summarized below :-

 [ Simple Table Format ]

Types of Utility

Standard

Site Area Required

Minimum Width of access

Minimum safety clearance

Maximum gradient of access
Electricity Supply
Extra High Voltage Substations 6500m2
(100m x 65m)

6.5m

 200m away from telephone exchange, broadcasting or radio communication installation

1 in 12
Bulk Infeed Substations 

(a) in CLP Power network

(b) in HEC network :

(i)  275kV Station


(ii) 132kV Station

2870m2
(70m x 41m)


1504m2
(32m x 47m)

2550m2
(30m x 85m)

 

4.5m



4.5m


4.5m



1 in 10



1 in 10


1 in 10
Primary Substation (Zone Substations)

(a) in CLP Power network 

 

(b) in HEC network


1705m2
(55m x 31m)


1600m2
(40m x 40m)




4.5m



4.5m




1 in 10



1 in 10

 
Consumer's Substation
(Distribution Substation)

(a) Indoor Type


(b) Outdoor Type


30.25m2
(5.5m x 5.5m)

51m2
(8.5m x 6m)




3m


3m




-


-




-


-
Overhead Transmission Lines

(a) 400kV


(b) 132kV


(c) 66kV


(d) 33kV


(e) 11kV




-


-


-


-


-

6m; may be required to reach the principal face of any adjacent building development for fire fighting purpose 


Horizontal : 5.5m
Vertical : 7.6m

Horizontal : 3.7m
Vertical : 6.7m

Horizontal : 3.2m
Vertical : 6.1m

Horizontal : 2.9m
Vertical : 6.1m

Horizontal : 2.9m
Vertical : 6.1m		  
Underground Cables no set standard
minimum separation between power cables and telephone cables is 0.3m wherever practicable.
Gas supply no set standard
Telephone Services

Telephone Exchange

(a) local exchanges in rural areas with <10,000 lines

(b) local exchanges in urban area with 
20,000 - 60,000 lines

(c) local exchange in urban areas with >120,000 lines or combined local/ tandem exchanges or telephone exchange complexes



500m2


1000m2 - 1500m2



1500m2 - 2000m2

 



-


-



-

 at least 200 m away from any power generating station, bulk infeed substation or primary station

 

-


-

 

-
Telephone cables a minimum separating distance of 2.5m from the nearest Light Rail Transit System and 300m from Kowloon Canton Railway System.

 

[ Table Summary ]

Types of Utility

Standard
Radio and Broadcast Communications no set standard
Water Supply  
(a) service reservoirs
  • as near as possible to the area served
  • at level where water can be fed by gravity to the supply zone
(b) pumping stations
  • reasonable proximity to the source of supply
  • adequate vehicular access
  • away from noise sensitive uses
  • a minimum clear distance of 100m from the sea water intake of salt water pumping stations
(c) treatment works
  • follow the procedures laid down by the Coordinating Committee on Land Use Planning and Control related to Potentially Hazardous Installations
(d) water mains
  • normally placed underground and routed along carriage ways.
  • adequate separation from power cables and other services
Drainage Services  
(a) foul sewerage system
  • under carriageways, footpaths, cycle tracks and amenity strips
  • gravity sewerage system is preferred
(b) stormwater drainage system
  • collected and conveyed in enclosed drains or open channels

(c) pumping stations and sewage treatment work

 
  • with design to minimise noise, odour and visual problems
  • away from residential and other sensitive area

(d) polder drainage and floodwater dumping schemes
  • at lowest areas of the scheme
  • covered or properly fenced off
(e) drainage reserves
  • structures not permitted
 

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2005 Copyright Important notices  Last revision date : April 2002