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Temple closes 20th Street overpass for inspection after engineers find concrete cracking and beam movement
Summary
City public-works staff closed the 20th Street (Fourth Street) overpass after inspectors found cracking and movement at a bent beneath the bridge and asked council to approve monitoring and a six-month engineering evaluation estimated initially at about $150,000.
City public-works staff briefed the council on a structural issue at the 20th Street (Fourth Street) overpass that prompted an immediate closure to live load and a recommendation for expedited engineering analysis.
Don (Public Works staff) explained that staff observed concrete cracking and spalling on a bent (the horizontal element that transfers load to piers) under the overpass. A structural specialist's inspection and drone imaging showed beam movement and a noticeable shift in bearing contact. Staff reported the beam-bearing surface at one end had shifted by about 7 inches compared to the expected contact area; the consultant described the bent and pier as showing rotation and relative movement.
Staff said TxDOT performs annual inspections and had noted spalling on the most recent report but the condition was not on TxDOT's highest-priority list. Because on-site staff detected the progressing cracking and measured movement, the city closed the bridge to live loads as a safety precaution and recommended additional engineering analysis and monitoring.
Public Works asked council to approve a phased evaluation: instrument the structure for movement monitoring, undertake a detailed engineering study to refine repair costs and design, and provide comparative estimates for a temporary repair versus full replacement. Staff provided a preliminary planning-level number for advanced evaluation — about $150,000 for a six-month monitoring and analysis phase — but said the contractor's earlier, higher-level figures must be refined. Railroad operations had been notified; public staff said they had not been told of operational changes by the railroad.
Staff noted the bridge was built in the early 1980s and said some of the visible concrete has recently come off; staff found loose pieces during the site inspection. The immediate closure will remain until consultants confirm repairs or a plan to restore the structure to safe use.
Ending
Staff said the evaluation contract was on the consent agenda for the evening meeting to allow monitoring and analysis to begin promptly. The assessment will allow staff to return with options and cost estimates for either a temporary repair to extend life or a complete rebuild; staff also said it would also review other city bridges for comparable concerns.
