Portfolio Holder for highways, Cllr Brian Little said: â??On or around the 7 February five covers were stolen along with nine more being taken two days later and two more today (Friday 9 February).
â??This reckless behaviour is putting the safety of road-users at risk and is completely unacceptable.â?
16 known covers have been stolen although more could have been taken which are yet to be discovered.
Areas affected include: Stifford Clays, South Ockendon, Orsett and East Tilbury.
Cllr Little added: â??We are requesting Thurrock residents stay vigilant and let us know if you see any others missing.
â??This theft will obviously have a financial impact.
â??We have made the ones we are aware of safe â?? and are in contact with Essex Police.â?
To report a missing coverâ?? or any other highways defect, please visit: thurrock.gov.uk/report