Tahmoor Sporting Complex
Tahmoor NSW
Full civil delivery for the Tahmoor Sporting Complex, including demolition, bulk and detailed earthworks, stormwater infrastructure, and new asphalt pavement and roundabout construction.
STAGE 1
Site Strip
The project commenced with comprehensive site establishment, including survey set-out using supplied control and design data to ensure the accurate positioning and alignment of all works. Waste classification testing was completed early in the program to determine appropriate material handling, reuse opportunities, and compliant disposal pathways.
Environmental controls were implemented across the site to minimise construction impacts and maintain compliance. These measures included sediment fencing, stormwater inlet protection, and the installation of a stabilised construction access incorporating a shaker grid. Together, these controls effectively managed erosion and sediment movement while preventing the tracking of material onto surrounding roadways throughout the duration of the works.
STAGE 2
Services relocation & Stormwater
Existing infrastructure was removed to establish a construction-ready platform for the proposed works. This stage included the demolition and removal of the existing two-coat seal pavement, followed by full site clearing and preparation to facilitate bulk earthworks operations.
Prior to stripping activities, comprehensive service identification and protection works were undertaken. Existing communication cables and conduits were carefully adjusted and lowered to accommodate the increased pavement design levels and ensure continuity of service.
In addition, a new power conduit bank was installed to support future infrastructure requirements and provide essential servicing capacity for the new sporting complex.
STAGE 3
Sub Grade Replacement & Sub Base
After the removal of topsoil, the site was excavated to the nominated subgrade levels and proof rolled using a 12-tonne smooth drum roller, with inspection and certification undertaken by a geotechnical engineer.
Areas of subgrade instability identified during proof rolling were excavated and rectified. Soft or unsuitable material was removed and replaced with engineered select fill, with geotextile separation fabric and geogrid reinforcement installed to improve ground stability and ensure long-term pavement performance.
STAGE 4
Sub Base
Placement of a 40 mm subbase layer was carried out over areas reinforced with geotextile and geogrid to fully encapsulate and lock the stabilisation system into the overall pavement structure.
Subsoil drainage (AG lines) was installed in advance of sub base placement and connected to the stormwater network to manage groundwater and protect the long-term performance of the pavement.
All imported material was moisture-conditioned using the APX water cart and blended to achieve optimum moisture content prior to compaction. Once placed to the specified depth across the work area, the subbase was trimmed and compacted to meet the project’s density requirements.
Compaction testing confirmed compliance across all areas, allowing works to progress to kerb installation.
STAGE 5
Kerbs
Once the subgrade was trimmed to final design levels, kerb alignments and offsets were set out by our in-house survey team to ensure accurate line and level control.
Having dedicated in-house surveying capability enabled efficient coordination and rapid verification of locations and heights, allowing the kerb installation process to proceed without delay and ensuring smooth operation of the kerb machine.
Kerb construction was completed over a two-day period and included three profiles: kerb only, kerb with dish drain, and full kerb and gutter, delivered in accordance with project specifications and design requirements.
STAGE 6
20mm Base, Import, Spread, Compact, seal
Following the curing of the kerbs, backfill was placed and compacted to provide lateral support and ensure stability prior to pavement construction. Placement of the 20 mm base course material then commenced.
All imported material was moisture-conditioned prior to placement to achieve optimum compaction performance. The base was then trimmed and spread using a laser-controlled grader operating in conjunction with a Leica total station, delivering highly accurate control of line and level.
This methodology provides tighter tolerances than conventional GPS machine control, ensuring a superior finished surface and compliance with the project’s pavement specification.
STAGE 7
Two Coat Seal
A two-coat seal treatment was applied in accordance with the pavement design to protect the granular layers and prepare the surface for asphalt. This treatment provides effective waterproofing of both the 20 mm basecourse and 40 mm subbase, reducing moisture ingress and preserving pavement integrity.
The seal also enhances surface cohesion and provides a strong bond between the granular pavement layers and the asphalt wearing course, supporting long-term pavement performance and durability.
STAGE 8
Asphalt AC14
An AC14 asphalt wearing course was selected for this project to provide increased structural strength and durability compared to AC10, ensuring the pavement is well suited to the expected traffic loads and long-term performance requirements.
The asphalt was supplied and placed by Avijohn, chosen for their proven workmanship, attention to detail, and ability to deliver a high-quality finish in line with project specifications.
This project represents another successful delivery for APX Civil, and we are proud to have contributed to the development of this important community facility.
