| Cromwell Sewerage Treatment Works | 1976 | Clutha Valley Development, contract No. 14, Cromwell Expansion. Construction of Sewerage Treatment Works | 13 | Digital |
| Cromwell Sewerage Ponds | 1977 | As-builts - Stabilisation pond No.1, stabilisation pond No. 2 | 2 | Hanger 45 |
| Cromwell Expansion Sanitary Sewer Pumping Stations Anderson Park | 1982 | Job No. 9532, sheets 1 and 2. Job No. C 172, sheet 1. Includes foils and as-builts | 4 | Hanger 52 |
| Stage II Trunk Mains Stormwater Sewer | 1982 | Contract No. 8, job no. 9863, header sheet and sheets 1-10 | 11 | Hanger 52 |
| Pumping Station Number 1 | 1982 | Contract No. 9, Sanitary sewerage pumping stations. Job No. 9865, header sheet and sheets 1-7 | 8 | Hanger 52 |
