Challenging Street & Utility Reconstruction
The Lainson Avenue Rehabilitation project involved total reconstruction of the street and utilities along Lainson Avenue from Harrison Street extending west to a dead end with a hammerhead type turn-around in Council Bluffs, IA. The street had a very steep grade, and the existing street pavement, along with sidewalks, retaining walls, and resident access staircases, were extremely deteriorated. While the project site was just over 500-feet long, having just one access point at Harrison Street made design and construction a challenge.
Because the street is a dead end with residents needing access during construction, the project was divided into three construction phases. This also helped to facilitate utility construction sequencing.
Core aspects of the project:
- Demolition and removal of existing streets, sidewalks, and utilities
- Reconstruction and replacement of sanitary and storm sewers
- Relocating or replacing existing franchise utilities
- Replacing water mains
- New street pavement
- Sidewalk replacement with ADA ramps
- Retaining walls
- Driveway approaches
- Lawn restoration
Construction began in spring 2014 and concluded in fall 2014 at a total cost of $550,000. Snyder & Associates provided various services for the project:
- Topographic survey
- Coordination for geotechnical consulting and reporting
- Sanitary, storm sewer, and roadway design, including sanitary lateral replacement to the right-of-way
- Coordination for water main design
- Bidding phase services
- Construction staking
- Coordination for construction materials testing
- Construction observation
- Project management
The amount of pavement replacement done drastically improved the overall look of the street.
Many properties are elevated above the street, leaving their existing stormwater/roof drains to drape over the slopes or retaining walls. During the project, we designed a drainage assembly connection behind the replacement retaining walls to help move stormwater to the storm sewer system without unsightly above ground piping. Cleanouts were placed within the retaining walls to access the drainage assembly in case it becomes plugged with debris.