Drinkwater Bridge and Underpass Repair Work
Due to concrete deterioration found during ongoing inspection work on the Drinkwater Bridge and Underpass, the underpass is now closed. Additionally, access over the top of the overpass, which is on Civic Center Mall, will be closed to all activity. Please use caution when traveling in the area and adhere to all barricades and restrictions.
Construction work began in December 2018. The contractor has completed approximately 90 percent of the demolition on top of the bridge. This includes all surface treatments, and demolition of portions of the deck and planter walls. This is needed for the future deck enclosure. Full completion on the work on top of the bridge is for the end of January.
After securing the area, work will move to below the bridge deck to continue demolition of planter walls on Drinkwater Blvd. and begin construction of the substructure. This includes the new supporting wall and abutment wall needed for the bridge deck enclosure. Electrical work to remove the old infrastructure for the fountain and top of deck will begin in February.
The City has been doing everything it can to improve the visitor experience to the Civic Center Area while construction work is taking place. Pedestrian walkways were built to connect the two sides of Civic Center, Signage was placed in the area to let pedestrians know how to get around and the LOVE sculpture was relocated.
The construction work will cost $6.626 million and is scheduled to be complete during the fall of 2019.
The Drinkwater Bridge was constructed in the mid 1980’s creating the Civic Center Mall area which has evolved as the City’s civic and arts headquarters. The structure supports open space including grass and trees, the LOVE statue and the fountains which were installed as part of the bridge project.
In early 2014 staff was notified that there were sections of failing concrete located under the structure and as a result contracted with Caruso Turley Scott (CTS) to investigate the cause of the failing concrete. The findings revealed several areas of the structure that are failing due to water intrusion through the deck, due to leaking within the fountain structure, irrigation of landscaping and an insufficient drainage system, and waterproofing membrane that has exceeded its service life.
On June 12, 2018, the City Council authorized funding for repair work and hired Haydon Building Corporation to begin an investigative effort to determine the extent of the immediate repairs necessary. During the investigation, large areas of loose concrete were discovered along the west side retaining wall, in addition to the deterioration of the concrete columns within the center of the structure. Haydon Building Corporation was authorized by staff to remove all loose concrete on the retaining wall and columns, however, during their work the two columns were deemed too unstable for any further investigative effort.
On October 16, 2018 the City Council approved $6.626 million to repair the overpass. The first phase of will include securing the structure to repair existing damage and prevent future damage. A second phase of improvements will design and construct a waterproofing and drainage system for the bridge that will support the future Civic Center improvements identified in the recently approved master plan update.
Frequently Asked Questions
There is a great deal of concrete deterioration on the overpass that has made the structure unsafe. Crews were working to repair the failing concrete when they discovered the problems were more extensive than expected causing the emergency closure. There is limited pedestrian access available on the south side of the overpass.
Construction work to build a new supporting wall will begin in December of 2018 and is scheduled to be complete sometime during the fall of 2019.
One of the major causes of the concrete deterioration was water. We can no longer water the plants that are on the compromised bridge deck.
Scottsdale Arts and the City are working together find a new home in the Civic Center area for public art pieces currently on the overpass. The LOVE sculpture has been moved closer to Civic Center Library with City Hall and fountains as its new backdrop. Other public art pieces are being relocated in the area.
Budget: $8.57 M
Sponsoring Division: Transportation, Community Services, Public Works
Funding Source: Transportation Sales Tax, General Fund, General Obligation Bonds, Transportation Fund
Project Location: Drinkwater Blvd. between 1st Ave. and 2nd St.
Capital Project Management