This episode details my technical contribution as Site Supervisor to a residential urban infrastructure development, aimed at delivering fully-serviced land for Stage 1 of the Lot 349 Kearsley Road subdivision in Denmark, Western Australia. Providing 44 residential lots with road, drainage, water, sewerage, power and communications infrastructure.

The project entailed bulk earthworks and site preparation, construction of roadworks to MRWA standards, installation of stormwater and underground drainage networks, sanitary sewer and potable water reticulation under Water Corporation requirements, underground electrical reticulation and street lighting to Western Power standards, and communications conduits under NBNCo requirements.

The project was delivered by MC Civil Contractors for RC Developments, under the design and superintendence of TABEC Pty Ltd, with a total original contract value of USD 5,081,684 (excl. GST) plus variations, and an indicative completion time of 39 weeks (variable) from site possession.

• Rock excavation in drainage works

Sections of the drainage network required excavation through rock, increasing the risk of program delays and cost overruns on the earthworks and drainage scope.

Redesigned the affected sections as a lined surface table drain over rock, coordinating the revised CAD drafting (AutoCAD/Civil 3D) with the design team to keep the drainage solution buildable without disrupting the broader earthworks sequence. 

• High water table

Areas of the site presented a high water table, posing risks to excavation stability, compaction quality, and the integrity of underground services installation (drainage, sewer, water reticulation).

Adjusted construction methodology and sequencing for the affected areas, coordinating with the design team on dewatering and staging works to maintain compaction and certification standards despite groundwater conditions.

• Project design modifications

Changes to the original design were required as site conditions were confirmed during construction, creating a risk of disruption to the works program and certified progress claims.

Coordinated design modifications directly with the Superintendent (TABEC Pty Ltd), ensuring variations were documented, substantiated, and reflected accurately in works certification and progress claims to keep the project on program.

• Quality control across multiple work fronts

With bulk earthworks, pavement layers, and underground services proceeding simultaneously across a 44-lot site, ensuring consistent quality certification without delaying the works program was a key risk.

Implemented a structured quality assurance system (ITPs, hold point registers, geotechnical NDM/MDD testing) scheduled ahead of each work front reaching its hold points, keeping certification records audit-ready and supporting timely sign-off and progress claims.

Thanks to these actions, it was possible to stabilise the excavations, guarantee the verticality of the piles and carry out the concreting without contamination or loss of volume. Integrity tests confirmed that all structural elements were within the expected technical tolerances, thus ensuring the reliability of the transformer station foundation.

• Tender documents

• Project programme (Gantt chart) 

• Quality Control - Test Log

• Hold Point Master Register (quality compliance tracking)

• ITPs and inspection/testing records

• Geotechnical and compaction test reports

• Drainage design drawings

• Safe Work Method Statements (SWMS)

• HSE inspection checklists

• Progress claims and RFV documentation