Appendix F. Civil Engineering Report Part 2

                                                                                                                                                0080 30.09.2013
                                                                                                                                                     Page 2 of 3




          2. Conditions – (When Working in the Vicinity of Energex Plant)
2.1 Records:
The first step before any excavation commences is to obtain records of Energex plant in the vicinity of the work. For new work, records should be
obtained during the planning and design stage. The records provided by Energex must be made available to all construction groups on site. Where
plant information is transferred to plans for the proposed work, care must be exercised to ensure that important detail is not lost in the process.
2.2 Location of Cables:
Examining the records is not sufficient, as reference points may change from the time of installation. Records must also be physically proven when
working in close proximity to them. The exact location of plant likely to be affected shall be confirmed by use of an electronic cable and pipe locater
followed by careful hand or vacuum excavation to the level of cover slabs or conduits. When conducting locations Please be aware that no
unauthorised access is permitted to Energex Assets– including Pits, Low Voltage Disconnection Boxes, Low Voltage Pillars or High Voltage Link Boxes.
Hand or vacuum excavation must be used in advance of excavators. In any case, where any doubt exists with respect to interpretation of cable
records, Energex shall be contacted. For after hour’s emergencies Energex should be contacted on Ph. 13 62 62.
2.3 Electrical Cable Installation Methods:
Energex cables are installed with a variety of protection devices including:
1.   Clay paving bricks or tiles marked “Electricity” or similar (also unmarked)                             2.    Concrete or PVC cover slabs
3.   PVC, A/C or fibro conduit, fibre reinforced concrete, iron or steel pipe                                4.    Concrete encased PVC or steel pipe
5.   Thin plastic marker tape                                                                                6.    Large pipes housing multiple ducts
7.   Multiple duct systems, including earthenware or concrete 2-, 4-, and 6-way ducts and shamrocks
Note: Some cables are known to be buried without covers and cables may change depth or alignment along the route.
2.4 Excavating Near Cables:
For all work within 2.5 m of nominal location, the constructor is required to hand or vacuum excavate (pothole) and expose th e plant, hence proving its
exact location before work can commence.
 2.5 Excavating Parallel to Cables:
If construction work is parallel to Energex cables, then hand or vacuum excavation (potholing) at least every 4 m is required to establish the location of
all cables, hence confirming nominal locations before work can commence. Generally, there is no restriction to excavations parallel to Energex cables to
a depth not exceeding that of the cable. If an excavation exceeds the depth of the cables and it is likely that the covers or bedding material around the
cables/pipes will move, Energex must be contacted .Note: Cable depths & alignment may change suddenly.

2.6 Separation from Cables:
Any service(s) must be located at the minimum separation as per the tables below:

Table 1. Minimum Separation Requirements for Underground Services Running Parallel with Energex Assets

 (Minimum Separation required in mm)
 Voltage   Gas        Communication                                Water                      Sanitary drainage               Storm
  Level                    or TV                                                                                              Water
                                                         ≤DN 200           >DN200          ≤DN 200           >DN 200
     LV                               100
                  250                                  500            *1000           500           1000                        500
     HV                               300
                                    *Contact Energex/council to obtain specific separation distances

Table 2. Minimum Separation Requirements for Underground Services Crossing Energex Assets

 (Minimum Separation required in mm)
 Voltage     Gas          Communication                                        Water                    Sanitary drainage              Storm Water
  Level                         or TV
 LV & HV
             100                 100                                           300                                300                        100

Where the above table does not list a separation requirement for a particular underground service then 300mm shall be used.

2.7 Excavating Across Cables:
The standard clearance between services shall be maintained as set down in Table 2 above. If the width or depth of the excavation is such that the
cables will be exposed or unsupported, then Energex shall be contacted to determine whether the cables should be taken out of service, or whether
they need to be protected or supported. In no case shall a cable cover be removed without approval. A cable cover may only be removed under the
supervision of an Energex authorised representative. Protective cover strips when removed must be replaced under Energex supervision. Under no
circumstances shall they be omitted to allow separation between Energex cables and other services.
2.8 Heavy Machinery Operation Over Cables:
Where heavy “Crawler” or “Vibration” type machinery is operated over the top of cables, a minimum cover of 450 mm to the cabl e protective cover
mains must be maintained using load bearing protection whilst the machinery is in operation. For sensitive cables (i.e. 33 and 110kV fluid and gas filled
cables), there may be additional constraints placed on vibration and settlement by Energex.
2.9 Directional Boring Near Cables:
When boring parallel to cables, it is essential that trial holes are carefully hand or vacuum excavated at regular intervals to prove the actual location of
the conduits/cables before using boring machinery. Where it is required to bore across the line of cables, the actual locati on of the cables shall first be
proven by hand or vacuum excavation. A trench shall be excavated one metre from the side of the cables where the auger will approach to ensure a
minimum clearance of 500mm above and below all LV, 11kV, 33kV & 110/132kV cables shall be maintained.




                                      Energex Limited  GPO Box 1461 Brisbane Queensland 4001  ABN 40 078 849 055