Last (?) in this intermittent series of posts on location classification – Common Infrastructure Corridor.
The CIC location class highlights the special set of threats, and corresponding special mitigation measures, that arise when a pipeline is installed closely parallel to other infrastructure. That other infrastructure might include other pipelines, power lines, roads, railways or even a long conveyor belt. It doesn’t much matter whether the other stuff is in the same easement. The key point is that it is parallel and close enough that there is potential for interaction with the pipeline. “Close enough” is likely to vary depending on the nature of the other infrastructure.
For example, a pipeline within a road reserve definitely requires CIC classification, but a pipeline parallel to a road and outside the road reserve probably doesn’t because neither the road authority nor anyone else who builds services in roads is permitted to touch the adjoining private land. But few rules are universal and if there is evidence that the road does have extended influence (eg. cut-off drains that extend far into the adjoining land) then CIC might apply after all.
Assigning CIC location class has two main implications:
- Agreements addressing mutual protection of all the parallel infrastructure should be negotiated with the other parties if possible ( AS 2885.1-2007 Clauses 5.5.4(e) and 5.5.6(d) )
- Consideration should be given to the possibly increased consequences of pipeline failure should the other infrastructure be affected (eg. a busy road, other pipelines, etc)
CIC does not apply where a pipeline crosses other infrastructure. The key feature of parallel infrastructure is that the overall exposure to increased threats and consequences is increased by the extent of close association between the pipeline and other stuff.
I’ll repeat (for the last time) that it’s not worth getting obsessed about the details of location classification, as long as it works to achieve its objective of highlighting features of the pipeline surroundings so they get appropriate treatment in the design and safety management study.