Guideline ACT is currently completing the Woden Transit Interchange, as a subcontractor to Lend Lease. This is a significant transformative project for Woden, a major Canberra Town Centre undergoing a generational revitalisation with the construction of a new educational facility, the Canberra Institute of Technology building right next to the site, and the area generally being developed into housing. The interchange will also become a stop in the next leg of Canberra’s light rail network. The project involves demolition, earthworks, underground services, rigid and flexible pavements, structurally rated platforms, traffic signalisation, streetlights, and soft and hard landscaping. The challenge is working within a busy, established town centre whilst maintaining existing services, including a bus interchange through staging.

The Molonglo Valley Interceptor Sewer (MVIS) Odour Mitigation Project is a critical infrastructure initiative aimed at addressing the odour emissions from the MVIS in the rapidly developing Molonglo Valley area in Canberra, ACT. This project involves the detailed design and construction of four advanced Odour Control Units (OCUs) and associated ancillary works.

Awarded the Design and Construct Contract based on its experience and reputation in late 2021, Guideline ACT constructed four separate Odour Control units, the first unit commencing operation in November 2023 and the final in May 2024. The units are housed within purpose built structures along a 6 kilometere stretch of the existing 3metere diameter trunk sewer main, which also need to be protected and aconnected to.

“The MVIS Odour Mitigation Project has met all our requirements by significantly reducing odour levels and ensuring the protection of the sewer infrastructure. The project’s timely completion and adherence to budget constraints are commendable, making it a model project for future infrastructure developments.”

Braddon Public Realm Upgrade project presented an exciting opportunity for the safe renewal and authentic place making through the design and construction of a public domain and streetscapes in order to cultivate a lively, activated, urban space for both local community and visitors in the Braddon suburb precinct.

In January 2023, Canberra Renewal Authority engaged Guideline ACT as the Project Manager under a Project Management Agreement contract to coordinate personnel, design consultants and trade contractors as necessary to complete public domain upgrades in five separable stages of works spanning across Lonsdale and Mort Streets in Braddon.

The construction increased safety and maximises the capacity for pedestrian flows along the street through the addition of new pedestrian crossings incorporating intensive soft landscaping gardens, new lighting and street furniture to activate these spaces.

Completed in 2024, the project reflects the communities desire for the area, highlighting the importance of connectivity, access, and a strong retail precinct that celebrates Braddon’s character.

Late 2023 Guideline ACT was engaged by Essential Energy to fully design, develop and construct an underground electrical and communications duct system to provide a dual circuit 132kV transmission path between Essential Energy’s overhead transmission poles and the ‘under construction’ Zone Substation at South Jerrabomberra.

The key Challenge for the project was the need for the underground 132kV electrical service to cross an existing ICON Water 1650mm diameter trunk water supply ensuring a minimum clearance of 1500mm was maintained without comprising the integrity of the essential service. Guideline ACT successfully designed and constructed a solution using micro tunnelling technology to create two ducts utilising 875mm diameter reinforced concrete pipes, approximately 30 metres in length each and over 4 metres deep.

Completed in 2023, Guideline ACT was awarded the Weetangera Stormwater Augmentation (WSA) as the principal contractor by Major Project Canberra (MPC). The project involved augmenting 1.4km of stormwater through Weetangera, an established Canberra suburb, by replacing 600m of pipe with box culverts and duplicating 800m of stormwater. All large diameter culverts, generally in the middle of the road, access to households and existing services had to be maintained. The project also required relocation of existing services. Another significant part of the project was the construction of 51 kerb inlet and R sumps in single, double, triple, quadruple, and quintuple formations to increase the storage capacity for sudden intense rainfall events. The project also involved the construction of 10 special chambered manholes

The Construction of B5090 Naas Road Bridge over the Gudgenby river was a construct only contract delivered by Guideline ACT on behalf of Transport Canberra and City Services. The project objective was to upgrade the existing single lane timber bridge, initially constructed in 1938, to a new two-lane post tensioned concrete bridge. This important piece of infrastructure ensures critical access for local residents during major flood events.

A key feature of this project was that the original design was based on a cast insitu deck and parapets to overcome height restrictions. However, due to unseasonal and unprecedented wet weather flooding the site several times during construction. Lead by Guideline ACT the original design was completely overhauled to what can be best described as a hybrid between precast and cast insitu elements to complete the project with a significant reduction in risk for all stakeholders. The bridge was completed in 2022.

Winner of 2019 CCF ACT Earth Award Project $10M – $30M

Winner MBA Building in Excellence Award 2019 Civil – Other

Due for completion in late 2018, there are two parts to this significant project; Construction of two wetlands in the existing Isabella pond as a part of the ACT Healthy Waterways scheme and the widening of the existing labyrinth wall weir forming the dam wall for Isabella pond.

The aim of the Isabella Ponds Wetlands project is to improve the quality of the water at both the incoming pond areas as well as the outgoing water into the Murrumbidgee River system; the wetlands ponds will create a haven for flora and fauna.

The weir is being widened to allow for higher flows, thus greatly reducing the risk to downstream stakeholders of Tuggeranong. The additional flow capacity of the weir also reduces the risk of damage to the Drakeford Drive Bridge. The key activities of the new upgrade include the demolition of the exiting abutment and labyrinth wall and then the reconstruction of the reinforced concrete structure.

Constitution Avenue Upgrade completed in December 2016, a gift funded by the Australian Government in celebration of Canberra’s Centenary that has resulted in a vibrant, mixed-use, tree-lined grand avenue with enhanced public transport, cycling and pedestrian infrastructure.

The reconstruction of the almost two kilometres of the heavily trafficked avenue in the middle of the city has resulted in a multiple award winning piece of infrastructure which incorporates landscaped pedestrian places with enhanced lighting, street furniture and wide pedestrian zones for people to move and meet.

Dedicated bus lanes and bus priority at intersections as well as segregated cycle lanes all help promote sustainable transport along the avenue and incorporating advanced tree plantings, instantly take away the harshness of the city landscape around it.

John Gorton Drive completed in November 2016 remains the largest construction project undertaken by Guideline ACT.

As a significant arterial road, the scope of work included the construction of a divided dual lane arterial road, extending the newly constructed John Gorton Drive further north approximately 1.5km from Coombs to Denman Prospect, including two significant single span bridge structures, trunk sewer and water main, permanent water feature ponds, temporary silt ponds service relocations and signalized intersections.

The project facilitated the accreditation of OFSC for Guideline ACT and received numerous awards during and after its construction.

The Molonglo Valley urban development Stage 2, which is expected to accommodate approximately 55,000 residents over the next 30 years, required various preliminary infrastructures.

The Cravens Creek Water Quality Control Pond has formed part of that infrastructure, acting as an intermediary between the Molonglo River and the potential overland flow of the surrounding residential developments.

Key components of the Cravens Creek WQCP construction include the embankment – constructed as six tier, layered earthen dam with materials ergonomically sourced from onsite excavations, the primary spillway – a 500m3 cast in situ concrete spillway comprised of an intake tower, outlet conduit and steel arch inlet cover, internal drainage point for future maintenance and concrete stilling basin with surrounding gabion mattresses and walls designed to ensure dissipation downstream of the spillway.

The WQCP has been designed to withstand and manage discharge rates up to the design 5 year ARI event and convey peak flows up to the 20 year ARI event through the primary spillway.To account for greater ARI events a secondary spillway has been constructed in the form of a grassed channel to attenuate the flows from 20 year ARI event up to the 10,000 year ARI event. The project was completed in 2016.

Works involved the delivery of a DN450 offtake cut into the DN1800 bulk water pipeline.

The new connection includes 30m of new DN1800 pipeline inclusive of 2No.DN1800 butterfly valves, bypasses, scours, DN450 offtake manifold and construction of valve chamber.

The DN450 offtake manifold connects to the Bulk water pump station suction main at the tie in point adjacent to the Bulk Water Pump Station building and then pumps to the new township of Googong supplying uninterrupted drinking water.

The project involved the construction of the Lyneham & Dickson Wetlands and associated works including pump stations. Completed in 2012, the project involved the construction of the Dickson & Lyneham Wetlands and associated works including pump stations.

The Lyneham & Dickson Wetlands were part of a suite of wetlands to be constructed in the Sullivans Creek Catchment. The wetlands consist of a large landscaped stormwater retention basin at both sites complete with inlet and outlet structures and a pump station, with the future aim of harvesting the stormwater and using it to water the local sporting fields. The pond area includes shared paths, new pedestrian footbridges and the realignment of the main community footpath route.

The main purpose of the Lyneham & Dickson Wetlands project is to provide water quality improvements, water for irrigation, increasing aquatic and terrestrial habitat in urban areas and creating recreational, volunteering and educational opportunities.

Completed in 2010, Tharwa Bridge Upgrade stage 2- Substructure and approach span strengthening project involved strengthening the 115 year old bridge as part of an overall project to restore the bridge to its former glory and increase its load bearing capacity without affecting its heritage value.

The project involved a number of factors making it “more than a simple construction job” because of the heritage value, the environmental factors associated with working over flowing water, and emotional impact as the bridge is an iconic structure deeply embedded in the Tharwa community psyche.

The work involved strengthening 5 existing concrete pier foundations by way of jet grouting and ground anchors, strengthening the remaining 6 piers via carbon fibre straps to the head stock and replacement of both abutments including foundations. Strengthening the approach spans was achieved by installing additional steel girders for spans 1 to 5 and 10 to 12.

Completed in 2010, the construction of the Central Valley, an 8 hectare section of the National Arboretum Canberra project, where a series of 36 earth terraces down the side of a hill create a dramatic public garden of international interest.

The construction team, Guideline ACT, brought its engineering expertise to a large scale work of art ensuring the design intent was delivered, constructing the terraces to sound engineering principles.

Cotter dam, a mass concrete gravity dam, was constructed in 1912 and was raised in 1949. Concerns about ageing and structural integrity of the dam were broached as early as 1967 and with the revision to the probable maximum flood and earthquake requirements of 1 in 10,000 years, plus the proximity to a popular recreational resort, the decision was made to strengthen the dam.

The aim of the Cotter Dam Remedial Works project was to strengthen the wall of the mass concrete gravity dam by replacing the top of the existing wall.

Scope of works:

The spillway section of the dam wall was removed to 1.5m below the original level and the abutments were removed to 1.8m below the original level for the full width of the dam Permanent post tensioned re-stressable ground anchors were placed. The 45 anchors, ranging in length from 20m to 60m and weighing up to 2.5tonne, involved drilling 1800m of holes Form work was erected and the concrete for each of the new load distribution beams was placed in two pours Water proof grouting and stressing the anchors Construction of a discharge facility The Cotter Dam Remedial Works construction is a signature project for Guideline ACT. Completed in 1999, it was an innovative, difficult and dangerous undertaking, involving an inventive approach to construction and a high level of detail and control. This is the calibre of project Guideline ACT has built its reputation on.