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Litchfield Park Road Upgrade and Seal, NT

Litchfield Park Road Upgrade and Seal, NT
project details
Location:
Litchfield National Park, NT
Client:
Northern Territory Government
Contract Value:
$2.1M
Commencement Date:
27 August 2017
Completion Date:
14 December 2017
Referees:
Shane Dahlhelm, DIPL Project Director

The Litchfield Park Road Upgrade will complete formation upgrading and sealing of the Litchfield Park Road loop, and will include the construction of Lower Finniss River Bridge. Sitzler was awarded the contract for Stage 1 of the overall upgrade in August 2017 and commenced works on site immediately.

Two separate sections of existing unsealed road were upgraded between CH 26.76 to 29.01, and CH 30.35 to 30.90 km with limited space available for traffic management measures within the road reserves. Our site team effectively managed a number of sensitivities regarding indigenous stakeholders, water supply and material issues to deliver the project on-time and under budget.
As Stage 1 of an overall program, it was a project requirement to transition from new works back on to the existing alignment in advance of a large embankment cutting. The project team worked collaboratively with the client, designing a temporary ramp including site survey, signage, stormwater drainage and selection of horizontal and vertical geometry. This work allowed public traffic to utilise the new sealed formation and also transition safely back to the existing alignment with no safety issues.

As works progressed deeper into a large embankment cutting, material characteristics varied significantly from geotechnical data. The project team worked closely with the client to tailor construction methods that ensured all available cut material on the site was utilised and placed in a conforming condition. This assisted with achieving the documented scope of works within the client’s available budget, and avoided the need for costly imported fill.
The completed works required over 40,000m3 of cut-to-fill earthworks within National Park boundaries, and with close consultation with representatives from local communities an indigenous participation level over 30% was achieved on the project.