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This list shows 29 bridges that scored a sufficiency rating below 50 on a 100-point scale, according to the 2010 National Bridge Inventory kept by the Federal Highway Administration.
The scores reflect inspections in 2008, 2009 and early 2010. The descriptions include observations from the most recent inspection reports available, including some inspections conducted in 2011.
The latest information available is used. Texas Department of Transportation officials say that, since the 2010 inventory was published, 16 of the bridges have been repaired or replaced, or soon will be.
The bridges are listed by score, lowest first.
DEFINITION OF TERMS
Score: 7
Bridge: I-35W northbound frontage road, north of Basswood Boulevard, far north Fort Worth.
Year built: 1967
Vehicles per day: 12,000
Why the low score? Culvert on a dead-end road that was briefly closed in 2009. State officials say the low score is a glitch. The fact that the bridge was closed at inspection time, and its load ratings were adjusted, artificially dropped its score, they said. The road has since been re-opened, and its next inspection score will be about 77.7, the same rating the bridge had in 2007.
Score: 13.7
Bridge: East First Street, 0.9-mile east of Beach Street, east Fort Worth.
Year built: 1936
Vehicles per day: 3,680
Why the low score? Abutment threatened by sloughing at nearby channel. Bridge footings exposed. Evidence of scouring. "The founding material appears to be very erodible," inspectors wrote. Scheduled to be replaced in 2015, at a cost of about $11 million.
Score: 21.8
Bridge: Bowman Springs Road, 0.6-mile south of I-20, south Fort Worth.
Year built: 1939
Vehicles per day: 3,810
Why the low score? Cracks resembling alligator skin on asphalt deck. Spalling and delamination around drain holes. Up to four feet of scouring up and downstream. "The northwest and northeast wing walls are separated from the abutment wall and have failed," inspectors wrote. Scheduled to get repairs totaling $1.9 million.
Score: 24.2
Bridge: Cattle Baron Drive, 0.2-mile south of Confederate Park Road, Lake Worth
Year built: 1962
Vehicles per day: 1,200
Why the low score? New channel and bridge completed as of Sept. 13, 2011.
Score: 29.2
Bridge: South Stewart Street, 0.1-mile south of Main Street, Azle
Year built: 1939
Vehicles per day: 3,430
Why the low score? Honeycomb-style erosion on column. Spalling on deck joint. Timber back wall rotted at various locations. Improvements scheduled in 2012.
Score: 31.2
Bridge: West Division Street, 2.7 miles east of East Loop 820, Arlington
Year built: 1947
Vehicles per day: 19,300
Why the low score? Replaced in 2011.
Score: 31.5
Bridge: Silver Creek Road, 1.5 miles south of Confederate Park Road, Lake Worth
Year built: 1950
Vehicles per day: 7,900
Why the low score? Spalling at railing. Cracking on all spans. Minor undermining of south abutment at east end. Exposed rebar. Scheduled for improvement in 2014.
Score: 31.5
Bridge: Silver Creek Road, 2.5 miles south of Confederate Park Road, Lake Worth
Year built: 1940
Vehicles per day: 8,100
Why the low score? Hairline cracking with leaching. Spalling on north back wall. Scheduled for improvement in 2014.
Score: 32.8
Bridge: Farm Road 156, 9.5 miles north of Northwest Loop 820, Haslet
Year built: 1949
Vehicles per day: 9,700
Why the low score? Functionally obsolete bridge has been replaced.
Score: 33.7
Bridge: Elm Street, 0.13-mile east of U.S. 377, Keller
Year built: 1950
Vehicles per day: 2,590
Why the low score? Heavy spalling, cracking and erosion. Exposed rebar. Drains clogged. Plan to replace bridge in 2006 canceled.
Score: 33.5
Bridge: North Main Street, Trinity River, downtown Fort Worth
Year built: 1914
Vehicles per day: 13,600
Why the low score? Minor to moderate vertical cracking on concrete arch bridge spans. Arch post misalignment. Floor beams cracking, spalling and delaminating at various locations. Historically protected structure. Rehabilitation currently underway, at an estimated cost of $2.8 million.
Score: 35
Bridge: West Vickery Boulevard, over Henderson Street, south Fort Worth
Year built: 1930
Vehicles per day: 10
Why the low score? Bridge closed in 2002, after reconstruction of the nearby I-30/35W Mixmaster. Long spalled area with exposed rebar. Scheduled for demolition and removal in 2014.
Score: 38.5
Bridge: West Seventh Street, Trinity River, downtown Fort Worth
Year built: 1913
Vehicles per day: 12,010
Why the low score? Extensive delamination, spalling, cracking and exposed rebar. Sidewalk overhang supports are delaminating. "There are areas where chunks of concrete have fallen to the ground," inspectors wrote. "Bearing pad material (possibly lead) is squeezing out."
A contractor has been hired to replace the bridge by fall 2013, at a cost of $24.1 million. Parts will be manufactured off-site beginning this year, and installed in 2013.
Score: 41.5
Bridge: Burleson Retta Road, three miles east of I-35W (near Spinks Airport), south Fort Worth
Year built: 1939
Vehicles per day: 3,960
Why the low score? Scour below abutment walls has exposed footing of the back wall, wing walls and columns. Material behind the west back wall is falling out. Erosion of banks upstream and downstream.
Score: 41.7
Bridge: South University Drive, southbound across Trinity River, west Fort Worth
Year built: 1936
Vehicles per day: 17,330
Why the low score? Deck surface spalling and cracking. Bottom of deck has honeycombing with exposed rebar. Asphalt in truss span is worn, cracking and spalling at joints. Gusset plate deformed with possible pack rust. Functionally obsolete.
Score: 41.7
Bridge: Main Street over Texas 183, Euless
Year built: 1970
Vehicles per day: 14,800
Why the low score? Bottom side of slab has longitudinal cracking with leaching. Functionally obsolete.
Score: 43.3
Bridge: West Lancaster Avenue, over Foch Street, 0.3-mile east of Camp Bowie Boulevard
Year built: 1938
Vehicles per day: 6,910
Why the low score? Functionally obsolete. Superstructure in fair condition, with structural elements sound but minor loss of section or cracking, spalling or scour. Substructure is good. Deck is very good.
Score: 43.9
Bridge: Forest Hill Drive, near Carriage Hill Drive (near City Hall), Forest Hill
Year built: 1986
Vehicles per day: 17,980
Why the low score? Substructure in poor condition with advanced spalling, scouring or other deterioration. Superstructure in fair condition, with minor section loss. Deck has minor deterioration.
Score: 43.9
Bridge: Forest Hill Drive, near Valley Forge Trail, Forest Hill
Year built: 1986
Vehicles per day: 16,570
Why the low score? Substructure in poor condition with advanced spalling, scouring or other deterioration. Superstructure in fair condition, with minor section loss. Deck has minor deterioration.
Score: 44.1
Bridge: Hulen Street northbound, 2.1 miles south of I-30, west Fort Worth
Year built: 1968
Vehicles per day: 19,045
Why the low score? Functionally obsolete. Minor deterioration of deck and substructure. Superstructure is good. Replacement planned by 2013 as part of Chisholm Trail Parkway project.
Score: 44.1
Bridge: Hulen Street southbound, 2.1 miles south of I-30, west Fort Worth
Year built: 1968
Vehicles per day: 19,045
Why the low score? Functionally obsolete. Minor deterioration of deck. Superstructure and substructure are good.. Replacement planned by 2013 as part of Chisholm Trail Parkway project.
Score: 44.2
Bridge: Keller-Haslet Road North, 0.7-mile north of Farm Road 156, Haslet
Year built: 1940
Vehicles per day: 1,160
Why the low score? Culverts scored poor, which could mean large spalls, heavy scaling, wide cracks or opened construction joint permitting loss of backfill. Other problems could include settlement or misalignment, scouring or erosion at curtain walls, wing walls or pipes.
Channels are fair, meaning bank protection could be eroding.
Score: 45.2
Bridge: South Cravens Road, southwest corner of East Loop 820 and East Rosedale Street, southeast Fort Worth
Year built: 1952
Vehicles per day: 1,490
Why the low score? Culverts are rated poor, which could mean large spalls, heavy scaling, wide cracks or opened construction joint permitting loss of backfill. Other problems could include settlement or misalignment, scouring or erosion at curtain walls, wing walls or pipes. Channels are fair, meaning bank protection could be eroding. Scheduled for improvement in 2013, design complete.
Score: 45.6
Bridge: Shawnee Trail, 0.7-mile north of Loop 820 southwest of Texas 199, Lake Worth
Year built: 1962
Vehicles per day: 3,700
Why the low score? Bridge replaced in 2011, at a cost of $546,000. Deck was very good, but substructure was poor.
Score: 46.3
Bridge: Chapin Road, 0.1-mile west of West Loop 820, west Fort Worth (Chapin and Alameda area)
Year built: 1944
Vehicles per day: 700
Why the low score? Substructure is poor, with advanced spalling, scouring or other deterioration. Improvement scheduled in 2013, design complete.
Score: 47.2
Br idge: Nine Mile Bridge Road, 0.4-mile southeast of Texas 199, Lake Worth
Year built: 1926
Vehicles per day: 60
Why the low score? Superstructure and substructure in fair condition. Primary structural elements are sound but there may be minor section loss, cracking, spalling or scour. Scheduled for demolition and removal in 2014.
Score: 47.8
Bridge: Old Denton Road, 0.2-mile north of Keller-Haslet Road, far north Fort Worth (just east of Alliance Airport)
Year built: 1939
Vehicles per day: 240
Why the low score? Substructure is poor, with advanced spalling, scouring or other deterioration. Superstructure and deck are satisfactory, with minor deterioration.
Score: 47.7
Bridge: Silver Creek Road, 1.4 miles south of Confederate Park Road, far northwest Fort Worth (near Lake Worth)
Year built: 1939
Vehicles per day: 7,900
Why the low score? Bridge is functionally obsolete. Deck and superstructure are fair. Primary structural elements are sound but there may be minor section loss, cracking, spalling or scour. Substructure is satisfactory.
Score: 48.3
Bridge: South Pipeline Road, 0.1-mile west of American Boulevard, far northeast Fort Worth (near Euless)
Year built: 1938
Vehicles per day: 1,400
Why the low score? Functionally obsolete bridge has been replaced. Cost: $831,000. Superstructure was in fair shape, with all primary structural elements sound but minor section loss, cracking, spalling or scour. Deck and substructure were satisfactory. Scheduled for improvement this year. Design complete. Waiting for right-of-way agreement with American Airlines.
A NOTE ON TERMS
Words in the inspectors’ notes that may be unfamiliar:
Delamination: Separation of concrete into layers, often below the surface.
Functionally obsolete: Bridge used for purpose beyond its design (i.e. lane width, safety features, daily traffic).
Leaching: Intrusion of water into concrete or other bridge material.
Scouring: Erosion of earth or other material at or near the bridge base, usually by running water.
Sloughing: Standing water.
Spalling: Flaking, loss of concrete or other structural material.
(Photo of spalling with exposed rebar on the underside of the Elm Street bridge in Keller. Photo taken by reporter's cellphone during a visit to the bridge.)
