| Omakau Sewerage Scheme Loan Proposal | 1959 | Job No. 143/4, sheets 1-3 of 3 | 3 | Hanger 47 |
| Omakau Sewerage Scheme | 1965 | Contract No. 1078, drawings no. 4546, sheets 1-11. See also Hanger 48 for the as-builts of this scheme. See also Hanger 48 for further information. | 11 | Hanger 47 |
| Proposed Connection of Railway Houses and Station Building to County Sewerage Scheme, Omakau | 1967 | Job No. 13949, sheets 1 and 2 of 2 | 2 | Hanger 47 |
| Omakau Sewer Extension | 1968 | Job No. 4846, 1 sheet | 1 | Hanger 47 |
| Sewer Extension White Road, Omakau | 1976 | Jon No. 7632, sheet 1 of 1 | 1 | Hanger 47 |
| Bannockburn Sewerage Scheme | 1986-1988 | Job No. 13218. Plan of trunk sanitary sewer construction, sheets 1-12 | 12 | Hanger 40 |
