Ballyrogan Bridge replacement

• A temporary bridge will be constructed a few metres upstream of the existing bridge to maintain two-way access for road users during construction.
• The replacement bridge will be a new concrete two-span bridge with one set of piers, allowing for maximum channel flow once constructed.
• The road approaches will be built up to accommodate the height of the new bridge, which will minimise impacts from flooding for road users.
• The replacement bridge will be stronger, higher and built to modern design standards to improve safety for all users.

• Construction of temporary bridge and approach roads
• Demolition of existing bridge
• Construction of replacement bridge in existing alignment, reforming of approach roads to meet new bridge height
• Site remediation

To build the new bridge footings, temporary barriers (coffer dams) will be placed in the channel at each end of the bridge. These will be installed one at a time to minimise disruptions to the water flow in the channel. At most, water flow will be reduced by about 35% for 2–3 weeks while each coffer dam is in place.

We will work closely with our internal delivery teams to minimise impacts to water supply during these times.

Environmental controls will be in place and the work will not impact water quality. WaterNSW will minimise these impacts where possible.

Traffic management will be in place for the duration of the work.

Early 2026

• Temporary bridge construction starts
• Temporary approach roads constructed

Mid 2026

• Temporary bridge complete
• Existing bridge removal starts
• Work to build replacement bridge starts

Late 2026

• New bridge construction completed
• New approach roads to replacement bridge completed
• Temporary bridge uninstalled and removed from site

Three potential locations were assessed for the new bridge:

• North of the existing bridge (shown in red in Figure 1)
• South of the existing bridge (shown in yellow in Figure 1)
• Current alignment (shown in green in Figure 2) with a temporary bridge located upstream.

The current alignment was chosen because it requires minimal work on the approach roads to connect the permanent bridge and only minor work for the temporary bridge. The temporary bridge will allow traffic to continue throughout the project without using the existing bridge during construction. This option is also the most cost-effective and will be completed in the shortest timeframe.

WaterNSW has worked closely with Carrathool Council on the location and design of the replacement bridge and approach roads.

Figure 1: Options for building the new bridge north or south of the current bridge. The new bridge will be built in the same location as the existing bridge.

Figure 2: The new bridge will be built in the same location as the existing bridge. A temporary bridge and road approaches will be constructed a few metres upstream from the existing bridge.

WaterNSW will work closely with the local council, impacted stakeholders and will provide updates as the project progresses.

Community update February 2026

For more information about the repairs or to enquire about any of the project activities email engaement@waternsw.com.au or call 1300 662 077.