Installation of Isolation Valves via Live Cut In Methodology

⁠⁠⁠The Central Highlands Regional Council (CHRC) is responsible for the ownership, operation, and maintenance of the water reticulation networks servicing Anakie, Sapphire, Springsure, and Capella.

These networks are essential for the supply of potable water to residential, commercial, and industrial consumers across the region.

Over time, these systems have experienced frequent leaks and bursts, requiring ongoing maintenance. The lack of sufficient isolation points reduces operational flexibility, complicates maintenance, and increases the duration and impact of service interruptions.

To improve network resilience, maintainability, and system control, CHRC has identified multiple strategic locations where new isolation valves are to be installed. The installation works must be executed in a manner that ensures uninterrupted water supply to critical service areas, while adhering to the highest standards of safety, quality, and compliance.

Site Inspection 26/11/25 8:30 am Springsure - Compulsory

Site Inspection 26/11/25 11:00 am Sapphire - Compulsory

Site Inspection 26/11/25 1:00 pm Capella - Compulsory

Site Inspection 26/11/25 1:45 pm Tieri - Compulsory

Methodology & Program 30%

Relevant Experience 15%

Development of Competitive Local Business 5%

Price 50%

4. PARTICULARS OF GOODS AND SERVICES

The Contractor shall design, supply, install, test, and commission new isolation valves and associated infrastructure in accordance with CHRC’s standards and the Capricorn Municipal Development Guidelines (CMDG).

The scope of works includes, but is not limited to:

4.1 Methodology Design and Review

Develop a detailed installation and live cut-in methodology to ensure the integration of new isolation valves into the existing CHRC water reticulation system without interruption to water supply.

The methodology shall specifically address:

• Live connection procedures, including step-by-step isolation, cutting, and connection sequencing.

• Risk assessment and control measures to mitigate hazards such as water hammer, contamination, and unplanned service loss.

• Temporary bypass and staging arrangements to maintain supply continuity.

• Communication protocols with CHRC Water Utilities Team and affected stakeholders prior to and during live works.

• Testing, flushing, and disinfection procedures in accordance with CHRC requirements, Water

Supply Code of Australia (WSA 03:2011) and the national standard AS/NZS 3500.1:2021.

• Emergency response procedures in the event of an unexpected failure or loss of containment.

Reference must be made to:

CMDG-W-040 – Bedding and Backfill for Water Main Construction.

CMDG-W-060 – Hydrant and Valve Installation.

CMDG-W-061 – Hydrant and Valve Surface Boxes.

The draft methodology shall be submitted to the CHRC Water Utilities Team for review and discussion during a Methodology Review Meeting.

Following the review, the Contractor shall incorporate CHRC’s feedback and obtain formal approval prior to commencement of live cut-in works.

The approved methodology shall be treated as a controlled document and referenced in all related SWMS, ITPs, and construction plans

4.2 Pre-Construction and Establishment

• Mobilisation, establishment of site facilities, insurance, securities, and permits.

• Site reconnaissance, survey, and location of existing services, including potholing, identification and protection of underground utilities.

• Development and implementation of:

• Safety Management Plan (SMP)
• Environmental Management Plan (EMP)
• Traffic Management Plan (TMP)
• Quality Management Plan (QMP)
• Asbestos Management Plan (if applicable)

4.3 Construction and Installation

• Controlled excavation and removal of redundant or disused pipework (including asbestos pipes, if present).

• Supply and installation of Isolation valves, pipe fittings, and associated pipework.

• Valve box bases, risers, and surface boxes with lids.

• Pipe supports, thrust blocks, markers, posts, and indicators.

• Installation works to be carried out under live conditions, ensuring continuous water supply to critical customers and zones.

• Backfilling and compaction in accordance with CMDG-W-040 (Bedding and Backfill for Water Main Construction). Any backfill/reinstatement needs to be done with stabilized fill material in the event of over excavation of the trench.

• Installation of valves in accordance with CMDG-W-060, and surface boxes in accordance with CMDG-W-061.

4.4 Testing and Commissioning

• Live connection to the existing water main, followed by system flushing and disinfection and/or bacteriological testing.

• Validation of valve function, leak checks, and full reinstatement of disturbed surfaces (bitumen, concrete, paving, turf, etc.) to like-for-like condition.

4.5 Handover and Post-Construction

Compilation and submission of a Handover Data Package comprising:

• As-Constructed drawings (DWG + PDF)

• Testing and commissioning records

• Operation and Maintenance (O&M) manuals

• Asset data for CHRC’s GIS system

• Provision of critical spares and specialized tools, if required.

• Rectification of defects during the Defects Liability Period.

5. SPECIFIC REQUIREMENTS OF THE CONTRACT

Refer Annexure B: Water Utilities Project General Specification

6. LOCATIONS

Refer Annexure A: Location and Data Sheet.

7. OPERATIONAL HOURS

Refer to Cl 26C of the Proposed Contract.

8. PRODUCT STANDARDS/AUSTRALIAN STANDARDS

The Central Highlands Regional Council (CHRC) has provided, in Annexure C, an information and data sheet for a representative product that satisfies the required specification and operational criteria. Annexure D illustrates the typical installation details applicable to such a product.

The Principal requires respondents to submit a product of equivalent or superior quality, performance, and functionality that meets or exceeds the specification and operational requirements demonstrated in Annexures C and D. All proposed products must be fully compliant with these standards and suitable for the intended operational context.

9. PRICING

There are two separable portions within the Pricing Schedule. The Central Highlands Regional Council reserves the right to award either one, both portions, or parts thereof, at its discretion.

10. WORKPLACE HEALTH AND SAFETY

Central Highland Regional Council is committed to providing a healthy work environment, by eliminating environmental tobacco smoke for all persons who work in or are exposed to a workplace or workplace activity and by encouraging smokers to stop smoking.

The Contractor has an obligation to take all practicable steps to ensure the WHS of its employees, subcontractors and their employees and other people (not employees) who may be affected by the Contractor’s work practices. The Contractor has an obligation to consult, cooperate and coordinate activities with all other persons who have a duty in relation to the same matter, namely Central Highland Regional Council.

The WHS management system of the Contractor must be the minimum requirement to demonstrate compliance with all duties of an employer specified under legislation. The Contractor must submit with the tender a sample copy of the following that demonstrates the Contractor has a WHS management system suitable for this contract:

• WHS policy and objectives

• Organisational structure and responsibilities

• Certificates of competencies and licences related to the contract

• Relevant risk assessments and controls; relevant safe working procedure

• WHS training and induction processes and records

• WHS inspections and auditing procedures

• WHS consultative processes, and

• Incident reporting and investigation procedures; and performance monitoring mechanisms.

11. PERSONAL PROTECTION EQUIPMENT

The health and safety of Central Highlands Regional Council staff and its contractors is of prime importance to Central Highlands Regional Council and is demonstrated in a number of ways including ensuring appropriate PPE attire is provided and worn.

Safety vests and safety boots will be worn, at all times, at work sites. Additional personal protection equipment may be required, as directed by Central Highlands Regional Council’s site representative.

12. IMPLEMENTATION TIMETABLE

The contract shall commence 7 days after the award letter and contractual arrangement is provided to and signed by the successful contractor. Central Highlands Regional Council anticipates the contract end date to be 30 April 2026.