Ministry of Education - School Infrastructure

Dargaville High School – Site Drainage Remediation

The Contract Works required are:

Remediation of the stormwater and wastewater drainage networks at Dargaville High School, 57 Plunket Street, Dargaville, in line with the Remedial Schedules (SW and WW). The works cover 30 stormwater lines and 14 wastewater lines, ranging from 80mm to 450mm in diameter, in earthenware, PVC, concrete, asbestos cement and relined pipe. The works include:

- removal of the illegal connection by redirecting the caretaker's shed toilet and basin (WWHOL14_JCT6) from the stormwater system to the closest wastewater asset via a pumped connection (design, supply, installation, power supply and commissioning)
- full and part pipeline replacements
- pipe relining and spot repairs
- root cutting, heavy cleaning and debris removal
- exposing and raising buried manholes, and repairing manhole channels and benching
- replacing missing inspection caps
- exposing JCT3, installing a new mini chamber and completing CCTV of the line downstream to WWMH8
- post-works CCTV of every line worked on
- reinstating all disturbed surfaces (asphalt, concrete, paving, grass and gardens) to match existing
- handing over final as-built drawings, drainlayer records of work, commissioning records and warranties

The Contractor is responsible for the design of the pumped connection, the SWMH21_SWMH22 re-route and any works arising from the Provisional Sums. This includes obtaining any building consent, producer statements and Code Compliance Certificate needed. Provisional Sums cover pipelines without a full condition assessment and further works found by re-CCTV inspection. They are to be spent only on the Engineer's instruction.

The works are on an occupied, operating school site and will be delivered as a single stage, with one handover at Practical Completion.

Department/Business Unit: Board of Trustees - Approve by BoT - ie. School Principal