BASEC Engineering was engaged by Nambucca Valley Council to deliver detailed design and documentation for the rehabilitation of North Arm Road between chainages 2.8 km and 27.4 km. The project forms part of Council’s broader road recovery and resilience program and involves complex terrain, variable pavement conditions and significant drainage considerations.

The project focuses on delivering a fully compliant, construction-ready design package that meets Council and Austroads standards while supporting DRFA funding requirements and long-term asset performance.

Our scope of services included:

• End-to-end detailed design management from investigation through to issue-for-construction documentation

• Coordination with surveyors and geotechnical consultants to inform alignment, pavement and drainage design

• Horizontal and vertical geometric design in accordance with Austroads and Council standards

• Pavement design and rehabilitation strategy tailored to existing subgrade conditions

• Stormwater drainage design and cross-drainage modelling to improve resilience and reduce future failure risk

• Preparation of detailed drawings, quantities and pre-construction cost estimates

• Safety in Design reviews and constructability assessments prior to issue for construction

• Quality assurance aligned with ISO 9001, ISO 45001 and ISO 14001 certified management systems

• Ongoing technical support during procurement and pre-construction phases

• Regular coordination with Council’s Project Manager to manage milestones, scope alignment and funding compliance

Project outcome

The North Arm Road detailed design provides Council with a compliant, buildable and cost-effective rehabilitation package ready for procurement and construction. Early risk identification, coordinated design inputs and constructability reviews have strengthened long-term resilience of the corridor while maintaining alignment with budget, program and DRFA funding requirements.