Pauls Drive, Valley View - 098700-18SA-RTR

Project description

The existing Pauls Drive crossing along this section of Dry Creek is substantially undersized with respect to regular flow-rates at this site. The upstream creek catchment is considerable and includes a combined large-size urban residential area within this northern region of metropolitan Adelaide consisting of Madbury, Ridgehaven, Banksia Park and Golden Grove. It is the only road crossing at Dry Creek, which services this predominately residential precinct and is also part of a number of public transport bus routes for the north-eastern Adelaide O-Bahn Bus network. At present, flood levels exceed the maximum height of the culvert opening every year on average, resulting in closure of the road to local traffic due to this hazard to the community. There has been at least one instance reported in either electronic or printed media of a driver needing to be rescued by Emergency Services (CFS, MFS or SES) from a vehicle trapped in the floodwaters. To address this combined local area traffic management (LA TM), road safety & flooding issue, the City of Salisbury will replace and widen a flood prone bridge with a new culvert structure to reduce flood hazard risk at this site.

The work proposed includes the replacement of the existing structure with a large precast arch bridge structure, that will accommodate a significantly greater flow capacity. Provision has also been made for the Dry Creek linear trail to be connected beneath the roadway, thereby removing the current need for trail users to leave the linear reserve and cross against the traffic along Pauls Drive. This major culvert upgrade project will include a wider bridge deck (approx. 13.20 metres in total width) for local area cycling/pedestrian connectivity & uninterrupted vehicular 2-way traffic flow along this section of Pauls Drive consisting of an 8.80 metre wide roadway from kerb to kerb with 1.0 metre wide sealed shoulders, 3.10 metre wide traffic lanes and a 0.60 metre wide painted/raised median for separating & delineating regular 2-way traffic flow. The reinstatement of 60.0 metres of Pauls Drive with a 400.0 mm pavement depth for a typical local roadway within a residential area with an AADT Volume of approximately less than 2000 vehicles per day (vpd). New kerbing, and also guard-railing as a roadside barrier treatment for 2-way traffic flow; and in the event that the linear park trails along Dry Creek at Valley View becomes impassable due to flooding and as an alternative route for a safe and continuous accessible path of travel (CAPT) for both cyclists & pedestrians, a 1.70 metre wide footpath between the guard-railing and safety fencing.

Total cost of proposed project is $2,150,000

Project last updated: 16 Sep 2020