| Administrative History | Plans were created by various preceding bodies to the transferee, the Department of Infrastructure, including: Harbour Board, Department of Transport. |
| Custodial History | Plans in this series were deposited under section 3(8) of the Public Records Act 1999 in 5 consignments (C740, C744, C750, C752 and C756) by the Operations division of the Department for Infrastructure in 2013. They were fully transferred to the Public Record Office under section 3(4) of the Public Records Act 1999 in September 2015. |