Bridge G0804 carries Route 19 over the Current River north of Round Spring. The bridge is 602 feet long carrying an 18-foot roadway. The bridge has been reduced to a single lane and has a posted load limit. The current bridge condition ratings from the last available official inspection in October 2019 indicate the bridge is in fair condition. 

The following alternatives were explored.

C-1A

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Description:

• New bridge on existing alignment.
• A grated two-lane temporary bridge will be built prior to construction of the new bridge and will be removed after the new bridge is constructed.
• Existing pedestrian bridge to be removed prior to temporary bridge construction.
• Pedestrians will be accommodated on the new bridge.

Advantages

• Matches location of existing bridge.
• Less permanent roadway work.
• Uses a two-lane temporary bridge during construction.

Disadvantages

• Additional cost for temporary bridge.
• Utilities on the existing pedestrian bridge must be relocated.
• Longer construction period.
• Extensive formwork in the channel.

C-1B

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Description:

• New bridge on existing alignment.
• A grated two-lane temporary bridge will be built prior to construction of the new bridge and will be removed after the new bridge is constructed.
• Existing pedestrian bridge retained but not accessible during new bridge construction.

Advantages

• Matches location of existing bridge.
• Less permanent roadway work.
• Uses a two-lane temporary bridge during construction.
• Utilities remain on existing pedestrian bridge.

Disadvantages

• Additional cost for temporary bridge.
• Longer construction period.
• Extensive formwork in the channel.

C-2A

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Description:

• New bridge on existing alignment.
• A grated one-lane temporary bridge will be built prior to construction of the new bridge and will be removed after the new bridge is constructed.
• Existing pedestrian bridge to be removed prior to temporary bridge construction.
• Pedestrians will be accommodated on the new bridge.

Advantages

• Matches location of existing bridge.
• Less permanent roadway work.

Disadvantages

• Utilities on the existing pedestrian bridge must be relocated.
• Uses a one-lane temporary bridge during construction.
• Additional cost for temporary bridge.
• Longer construction period.
• Extensive formwork in the channel.

C-2B

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Description:

• New bridge on existing alignment.
• A grated one-lane temporary bridge will be built prior to construction of the new bridge and will be removed after the new bridge is constructed.
• Existing pedestrian bridge retained but not accessible during new bridge construction.

Advantages

• Matches location of existing bridge.
• Less permanent roadway work.
• Utilities remain on existing pedestrian bridge.

Disadvantages

• Uses a one-lane temporary bridge during construction.
• Additional cost for temporary bridge.
• Longer construction period.
• Extensive formwork in the channel.

C-3A

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Description:

• New bridge downstream (east) of existing bridge.
• No temporary bridge required.
• Existing pedestrian bridge to be removed prior to new bridge construction.
• Pedestrians will be accommodated on the new bridge.

Advantages

• No temporary bridge required; cost savings.
• Shorter construction period.

Disadvantages

• Utilities on the existing pedestrian bridge must be relocated.
• More permanent roadway work.
• Uses the existing one-lane bridge during construction.

C-3B

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Description:

• New bridge downstream (east) of existing bridge.
• No temporary bridge required.
• Existing pedestrian bridge retained but not accessible during new bridge construction.

Advantages

• No temporary bridge required; cost savings.
• Shorter construction period.
• Utilities remain on existing pedestrian bridge.

Disadvantages

• More permanent roadway work.
• Uses the existing one-lane bridge during construction.

C-4

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Description:

• Multiple phase rehabilitation of the existing bridge.
• No temporary bridge.
• Existing pedestrian bridge retained and accessible during non-construction hours.   

Advantages

• Matches location of the existing bridge.
• No temporary bridge required; cost savings.
• Less permanent roadway work.
• Utilities remain on the existing pedestrian bridge.

Disadvantages

• Uses the existing one-lane bridge during construction.
• Longer construction period.
• Remediated concrete of the existing bridge is buried in the structure, possibly requiring further rehabilitation in the future.
• Shorter life expectancy compared to a new bridge.

C-5A

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Description:

• Single-phase rehabilitation of the existing bridge.
• A grated two-lane temporary bridge will be built and will be removed after the rehabilitation of the existing bridge is complete.
• Existing pedestrian bridge to be removed prior to temporary bridge construction.
• Pedestrians will be accommodated on the rehabilitated bridge.

Advantages

• Matches location of existing bridge.
• Less permanent roadway work.
• Uses a two-lane temporary bridge during construction.

Disadvantages

• Additional cost for temporary bridge.
• Remediated concrete of the existing bridge is buried in the structure, possibly requiring further rehabilitation in the future.
• Shorter life expectancy compared to a new bridge.
• Utilities on the existing pedestrian bridge must be relocated.
• Extensive formwork in the channel.

C-5B

View Aerial

Description:

• Single-phase rehabilitation of the existing bridge.
• A grated two-lane temporary bridge will be built and will be removed after the rehabilitation of the existing bridge is complete.
• Existing pedestrian bridge retained but not accessible during bridge rehabilitation.

Advantages

• Matches location of existing bridge.
• Less permanent roadway work.
• Uses a two-lane temporary bridge during construction.
• Utilities remain on existing pedestrian bridge.

Disadvantages

• Additional cost for temporary bridge.
• Remediated concrete of the existing bridge is buried in the structure, possibly requiring further rehabilitation in the future.
• Shorter life expectancy compared to a new bridge.
• Extensive formwork in the channel.

No-Build Alternative

Cost: Variable depending on inspection results

Description:

• This alternative leaves the bridge in place. Routine maintenance of the bridge would continue, but no major rehabilitation would be done. Without a major rehabilitation or replacement project, the bridge would likely be closed in the next 10 years.
• This alternative is required to be carried forward in the environmental assessment process as a baseline for comparison purposes.

Advantages

• Little to no environmental concerns

Disadvantages

• High maintenance costs
• Doesn't meet current design standards
• The deck, substructure, and superstructure wouldn't be improved
• Shorter life span