RNZ can reveal the contractor also carried out "serious" defective work in a City Rail Link (CRL) tunnel around the same time
KiwiRail is using a rail maintenance contractor it temporarily stood down in Auckland earlier this year over "faulty" track welding, saying it's confident crews have been sufficiently retrained.
RNZ could reveal the contractor - which carried out improper welding on train tracks in a Parnell tunnel over the Waitangi long weekend - also carried out "serious" defective work in a City Rail Link (CRL) tunnel around the same time.
These details emerged through correspondence released to RNZ under the Official Information Act.
The severity of the CRL welding faults were initially deemed to be "major", and had the potential to cause "serious/life changing injury or long-term impact to environment"], according to an incident report.
