Christchurch City Council has introduced the Permit to Work (PtW) system for works on the water supply and wastewater networks in order to ensure that Council:
has visibility of what is happening in the networks that we have to maintain
can notify its principal maintenance contractor of work carried out by others, in case an after-hours response is required
can notify the applicant of any special conditions and precautions they should take in doing the work and any contingencies and remedial actions required.
Permits to work are held by the Council and are distributed to their principal maintenance contractor so they have access to them after hours if they are called to respond to a work site controlled by others. The maintenance contractor can use them as an aid to knowing what is happening, and who to contact.
They are also useful for notifying the applicant of any special conditions and precautions they should take in doing the work. An example of this is where a wastewater main is to be renewed and there is valuable overflow monitoring equipment in one of the manholes which requires the notification and agreement from the Regional Council to remove, and a plan of how to deal with not having the overflow available.
A person who needs a permit to work may also need a permit to enter if the work involves entry into a pump station.
Who needs a permit to work?
- Contractors wishing to carry out works on water supply and wastewater reticulation pipe assets which:
- for water supply, result in a shut down of water supply and interruption for longer than four hours on pipes of 200mm and larger (i.e. overnight shut down)
- for wastewater, require overpumping or bunging when workmen are not on site, i.e. if a section of wastewater main is left in that state overnight with a pump going to keep the flow going with no one on site.
- Contractors wishing to carry out works on water supply and wastewater headworks assets (pump stations, reservoirs) which:
- are likely to have or cause a noticeable impact on a pump station (water or wastewater) or reservoir
- require work inside any of the pump stations or reservoirs (i.e. locking and tagging out valves, altering the position of any valve or equipment, shutting down pumps etc)
- will require the shut down of a pump station or the shut down of a major trunk main that will affect station operations.
- involves removal of plant within a pump station.
- Contractors wishing to carry out works on water supply and wastewater assets which will impact on the normal operation of the network such as:
- isolating a pump station from the network
- plugging the gravity going into a pump station as it will result in abnormal operation and alarms
- diverting flow away from one pump station to another
- isolating parts of the network for the purpose of flow monitoring.
If in doubt, contact Council to enquire whether a permit is required.
Apply for a permit to work
Email your completed application form to:
You can commence work only after approval has been given by Council.
Please allow a minimum of five working days turnaround time for water supply and wastewater reticulation permits, prior to commencing work.
Pump station and reservoir permits may have a longer turnaround time if the proposed works significantly impacts on the operation of the network or requires complex alterations to the existing system.