Repair and Maintenance of Pavements and Drainage on Arnhem Highway (4 locations) — Awarded to AMROCK GROUP PTY LTD

About

Department of Logistics and Infrastructure awarded a contract to AMROCK GROUP PTY LTD for the repair and maintenance of pavements and drainage along Arnhem Highway at four specified locations under Disaster Event AGRN 1269 - 31U.

The contract covered repairs of sealed road pavements including pavement stabilisation and bitumen sealing, maintenance of drainage and batter structures, and maintenance of unsealed roads.

Works were defined for four chainage sections: CH 28.13–28.50 (370 m), CH 34.95–35.29 (340 m), CH 205.19–205.46 (270 m) and CH 206.81–207.04 (230 m), each with a pavement and shoulder width of 9 m and an anticipated base course of 150 mm gravel.

The contractor was required to comply with DLI Standard Specification for Roadworks v5.4 (March 2024), with Hold and Witness points applying; an Environmental Plan was not required but the Standard Specification for Environmental Management applied.

Survey and design obligations included a localised survey of the repair patch including 50 m beyond each patch and 10 m each side of shoulder ends, provision of a repair patch design drawing with longitudinal geometry and cross sections at 20 m intervals, and level checking to replicate and correct the existing road geometry.

Earthworks and pavement works specified removal and pulverisation of 150 mm of pavement (including sealed road base and shoulder base), stockpiling and reuse as a stabilised sub-base 9 m wide, removal of 200 mm subgrade across 9 m width, evaluation and compaction of subgrade where compliant, placement of 150 mm pulverised gravel sub-base stabilised with 3% cement compacted to 98% relative compaction, importation of Fine Crushed Rock (FCR) meeting the contract particle size and property tables, placement of 200 mm FCR pavement and shoulder compacted to 100% Dry Density Ratio, grading of drainage to the outside batter, and application of a two-coat S10E spray seal with 14 mm and 7 mm aggregate.