Depot Street Rising Main Sewer Extension

⁠⁠⁠Rotorua Lakes Council (RLC) is undertaking a project to extend the existing Depot Street sewer rising main from the current discharge point at the corner of Victoria Street to a new discharge chamber within the rugby park adjacent to Te Ngae Road.

RLC is seeking a Civil Engineering Company to install >1,100 meters of 710mm-PE100-pipe from Victoria Street to Te Ngae Road. This extension will ultimately form part of a complete dedicated pipeline to the Rotorua Wastewater Treatment Plant (WWTP) to provide greater capacity and operational flexibility within the network. The extension connects to the existing rising main, roughly 40 meters upstream to the existing discharge manhole SH000428.

The current Depot Street sewer rising main, pumps sewage from the Depot Street pump station to the discharge chamber (UNITID: SH000428) near the junction of Victoria and Ranolf Street.

The Contractor shall allow for supply of materials and fittings, trenching, bedding, installation, temporary works, backfilling, testing, connecting, commissioning and all activities required to construct the pipeline, connections and ancillary works. Proposed works are expected to include, but are not limited to the following:

Potholing of all services crossed along the pipeline route to confirm exact locations, sizes and depths. Locations of potholes are to be approved by the Engineer prior to works commencing.

Confirmation of alignment and depth of the existing gravity and rising mains at tie-in locations to verify connection bends and other components required.

Construction, supply and installation of all components necessary for upstream tie-in near the junction of Ranolf and Victoria Street (refer to drawings T01696205-WW-230 to 232). Stages of construction to be followed as indicated within contract drawings and specifications. Includes cutting, removal and off-site disposal of sections of existing DN 630 PE100 SDR17 pressure main at proposed upstream tie-in.

Supply and installation of approximately 1110m of 710 OD PE100-RC+ SDR11 pressure pipe as per the specification from the upstream diversion tie-in to the downstream discharge chamber at the Rugby Park (refer to drawing T01696205-WW-201 to 208).

Design, Construct, Supply and Installation of all components necessary for downstream discharge connection at the Rugby Park (refer to drawings T01696205-WW-240 to 242). Includes live-cutting, removal and off-site disposal of sections of existing DN 750 AC gravity main at the downstream connection.

The Health and Safety at Work (Asbestos) Regulations 2016 for working around and disposing of asbestos are to be followed at all times during these works.

Compliance with Consent RM25-0494 relating to earthworks in contaminated sites (the rugby park) and discharge of dewatering water Road, walkway and grassed area reinstatement Traffic Management