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Every bridge in Canadian County, Oklahoma

495 inventoried bridges, busiest first

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled

BridgeBuiltVehicles/dayCondition
I-40 over Creek196563,000Good
I-40 over Creek196640,700Good
I-40 over Creek196640,700Good
I-40 WB over Reno Ave. Under196631,500Good
Kilpatrick Ramp EB over Mustang Creek Trib201930,400Good
Kilpatrick Ramp WB over Mustang Creek Trib201930,400Good
Kilpatrick Ramp WB over Mustang Creek Trib201930,400Good
Kilpatrick Tp EB over County Line Rd Under201930,400Good
Kilpatrick Tp EB over Morgan Rd Under201930,400Good
Kilpatrick Tp SB over SW 44TH St Under201930,400Good
Kilpatrick Tp WB over County Line Rd Under201930,400Good
Kilpatrick Tp WB over Morgan Rd & Creek201930,400Good
NB Kilpatrick Tp over SW 44TH St Under201930,400Good
I-40 EB over Reno Ave. Under196629,750Good
I-40 over Creek196128,500Good
I-40 over Creek196127,800Fair
I-40 over Creek196127,800Good
I-40 over Creek196627,300Fair
Kilpatrick Tp over Creek200022,700Good
NW 50TH over Creek200022,700Good
I-40 EB over Garth Brooks Blvd. Under196621,550Good
I-40 EB over Richland Rd. Under196621,550Good
I-40 EB over Shell Creek196621,550Good
I-40 WB over Garth Brooks Blvd. Under196621,050Good
Kilpatrick Tp over Creek200020,900Good
Kilpatrick Tp over Creek200020,900Good
I-40 EB over Purcell Creek201020,350Fair
I-40 EB over Six Mile Creek196620,350Fair
I-40 WB over Richland Rd. Under196620,100Good
I-40 WB over Shell Creek196620,100Good
Kilpatrick Tp over Creek197220,100Good
Kilpatrick Tp over Creek200020,100Good
Kilpatrick Tp over Creek200020,100Good
Kilpatrick Tp over Creek200020,100Good
NW 23RD over Creek200020,100Good
I-40 WB over Six Mile Creek196618,800Fair
I-40 WB over Purcell Creek201018,600Good
S.H. 4 over I-40 Under201417,300Good
S.H. 4 (mustand Rd over Mustang Creek198317,100Fair
S.H. 4 (mustang Rd over Mustang Creek Trib.199617,100Good
S.H. 4 (mustang Rd over Mustang Creek Trib.199617,100Good
S.H. 4 over Mustang Creek Trib.198316,400Good
Morgan Rd. (spui) over I-40 Under201216,200Good
S.H. 66 over Creek194915,700Fair
I-40 WB over U.S. 81 Under196615,550Fair
I-40 WB over UP R.R. Under196615,550Fair
I-40 EB over Creek196614,900Fair
I-40 EB over U.S. 81 Under196614,900Fair
I-40 EB over UP R.R. Under196614,900Fair
S.H. 66 over Creek194914,500Fair
Frisco Rd over I-40 Under202213,500Good
I-40 EB over Choctaw Rd. Under196613,200Fair
I-40 WB over Choctaw Rd. Under196613,200Fair
I-40 WB over Creek196613,200Fair
I-40 EB over Coleman Chapel Rd. Under196113,050Good
I-40 EB over Mayberry Rd & Creek Und196113,050Fair
I-40 WB over Coleman Chapel Rd. Under196113,050Good
I-40 WB over Mayberry Rd & Creek Und196113,050Fair
I-40 EB over S. Canadian River201611,950Fair
I-40 over Canyon View Creek196011,950Fair
S.H. 3 over Creek193911,800Fair
S.H. 3 over Spring Creek193911,800Good
Kilpatrick Tp NB over N. Canadian River200011,350Good
Kilpatrick Tp NB over N. Canadian River Oflow200011,350Good
Kilpatrick Tp NB over S.H. 66 Under200011,350Good
Kilpatrick Tp SB over N. Canadian River200011,200Good
Kilpatrick Tp SB over N. Canadian River Oflow200011,200Good
Vandament Ave over Creek196510,832Fair
Kilpatrick Tp SB over S.H. 3 Under200010,450Good
Kilpatrick Tp SB over S.H. 66 Under200010,400Good
Kilpatrick Tp NB over S.H. 3 Under200010,350Good
Kilpatrick Tp NB over NW 10TH St. & UP R.R Und200010,050Good
Kilpatrick Tp NB over NW 36TH St. Under200010,050Good
Kilpatrick Tp NB over Reno Ave. Under200010,050Good
I-40 Bus. over Creek195610,000Good
Kilpatrick Tp SB over NW 10TH St. & UP R.R Und200010,000Good
Kilpatrick Tp SB over NW 36TH St. Under200010,000Fair
Kilpatrick Tp SB over Reno Ave. Under200010,000Good
I-40 Bus./ U.S. 81 over Creek19469,600Fair
Morgan Rd. over Creek19649,600Fair
S.H. 3 over Creek19399,600Fair
NW 10TH St. over Creek19649,400Good
Kilpatrick Tp SB over I-40 Under20009,250Good
I-40 Bus. / U.S 81 over UP R.R.20229,100Good
I-40 WB over S. Canadian River20169,100Fair
I-40 over Canyon View Creek19619,100Fair
Kilpatrick Tp EB over Mustang Creek Trib20189,000Good
Kilpatrick Tp EB over Sara Rd Under20189,000Good
Kilpatrick Tp NB over Mustang Creek20189,000Good
Kilpatrick Tp NB over SW 15TH St Under20189,000Good
Kilpatrick Tp Ramp over Mustang Creek Trib20189,000Good
Kilpatrick Tp Ramp over Mustang Creek Trib20189,000Good
Kilpatrick Tp Ramp over Reno Ave Under20189,000Good
Kilpatrick Tp SB over Mustang Creek20189,000Good
Kilpatrick Tp SB over SW 15TH St Under20189,000Good
Kilpatrick Tp WB over Mustang Creek Trib20189,000Good
Kilpatrick Tp WB over Sara Rd Under20189,000Good
Kilpatrick Tp over Creek20189,000Good
Kilpatrick Tp over Mustang Creek Trib20189,000Good
Kilpatrick Tp over SW 29TH St Under20189,000Good
Kilpatrick Tp over SW 29TH St Under20189,000Good
I-40 Bus. over Four Mile Creek19568,600Fair
U.S. 81 over Four Mile Creek19978,500Good
S.H. 3 over Creek19398,100Good
S.H. 3 over Deer Creek19398,100Fair
U.S. 81 over UP R.R. Under19968,000Fair
E1070 (reno Ave.) over Creek20087,594Good
Reno Ave. over Creek19647,400Fair
U.S. 281 Spur over I-40 Under19617,200Fair
Kilpatrick Tp NB over I-40 Under20007,150Good
E1070 (reno Ave.) over Creek20046,900Good
S.H. 3 & U.S. 81 over Creek19706,800Good
S.H. 4 over Creek19876,700Good
S.H. 4 over Deer Creek19876,700Fair
S.H. 3 over Creek19396,200Fair
S.H. 3 over Creek19396,200Good
S.H. 66 over Purcell Creek20086,200Good
Cemetery Rd. over Mustang Creek19406,100Fair
NW 136TH St. over Creek19976,100Fair
U.S. 81 over Creek20166,100Good
U.S. 81 over Creek19535,900Good
S.H. 66 over Creek19285,700Good
S.H. 66 over Creek19285,700Fair
S.H. 66 over Six Mile Creek20085,400Fair
Sara Rd. over I-40 Kilpatrick Tp Ramps20195,300Good
N2950 (czech Hall) over Mustang Creek Trib20085,263Good
S.H. 4 (mustang Rd over S. Canadian River20015,200Fair
S.H. 4 over Creek19875,200Fair
Czech Hall Rd. over I-40 Under19985,000Fair
S.H. 4 (mustang Rd over UP R.R. Under20014,650Good
S.H. 4 (mustang Rd over S. Canadian River20014,600Fair
S.H. 4 (mustang Rd over UP R.R. Under20014,600Good
S.H. 4 over Creek20084,300Good
S.H. 3 EB over U.S. 81 Under19704,200Good
S.H. 3 WB over U.S. 81 Under19704,200Good
I-40 Bus. over Creek19294,100Fair
Morgan Rd. over Mustang Creek19804,100Fair
S.H. 4 over N. Canadian River20203,800Good
U.S. 81 over Creek20023,800Good
Czech Hall Rd. over Creek19913,700Fair
Czech Hall Rd. over Creek19653,700Fair
Sara Rd. over Creek19583,700Fair
Sara Rd. over Creek19903,500Fair
S.H. 152 over Creek19933,400Good
S.H. 152 over Creek19933,400Good
S.H. 152 over Creek19933,400Fair
U.S. 81 & S.H. 3 over UP R.R. Under19703,400Good
U.S. 81 & S.H. 3 over UP R.R. Under19703,400Good
U.S. 81 over Creek19283,400Good
SW 44TH St. over Creek19803,300Fair
11TH Street over N. Canadian River20083,200Fair
S.H. 3 EB over Creek19973,100Good
S.H. 3 EB over Uncle John Trib.19973,100Good
S.H. 3 EB over Uncle Johns Creek19973,100Good
S.H. 66 over Shell Creek19513,050Fair
U.S. 81 over Creek19283,000Good
U.S. 81 NB over Creek20052,950Good
U.S. 81 NB over Six Mile Creek20052,950Good
SW 15TH St over Mustang Creek Trib20172,900Good
SW 15TH St. over Creek19942,900Good
U.S. 270 over I-40 Under19612,800Fair
S.H. 66 over Shell Creek19512,650Fair
U.S. 81 NB over N. Canadian River19732,600Good
U.S. 81 SB over N. Canadian River20002,550Good
U.S. 81 SB over Creek20052,500Good
U.S. 81 SB over Six Mile Creek20052,500Good
S.H. 3 WB over Creek19932,450Good
S.H. 3 WB over Uncle John Trib.19932,450Good
S.H. 3 WB over Uncle Johns Creek19932,450Good
County Line Rd. over Creek19912,300Good
I-40 Bus. over Target Creek19622,300Fair
Sara Rd. over Creek19902,300Good
I-40 Bus. over I-40 Under19682,200Fair
S.H. 152 over Creek19932,200Fair
S.H. 152 over Dry Creek19932,200Fair
U.S. 81 over Uncle John Trib.20022,100Good
Overholser Lake Rd over Lake19352,000Fair
S.H. 152 over Creek19932,000Good
I-40 Bus. Ramp over I-40 Under19611,900Fair
U.S. 281 Spur over Canyon View Creek20011,850Good
U.S. 281 Spur over Canyon View Creek20011,850Good
U.S. 270 over Six Mile Creek19861,700Good
U.S. 81 over Uncle John Trib.20021,700Good
0908C over Soldier Creek19451,500Good
Czech Hall Rd. over Mustang Creek19801,500Fair
Czech Hall Rd. over Creek19601,400Fair
N2740 over Creek19951,320Good
N2740 over N. Canadian River19691,310Fair
N2740 over Creek19951,300Good
SW 44TH St. over Mustang Creek19921,300Good
N2740 over Creek20001,200Fair
U.S. 281 over S. Canadian River19331,100Good
N2970 (sara Rd.) over Mustang Creek19801,050Fair
E0890 over Creek20221,000Good
E0950 over Deer Creek20011,000Good
Fas 0936 over Creek19451,000Fair
Fas 0936 over Creek19501,000Good
Hefner Rd. over Creek19861,000Fair
N 11TH St over Creek19281,000Good
NW 108TH St. over Creek19971,000Good
Radio Rd. over I-40 Under20161,000Good
0922C over Creek1928970Fair
0922C over Creek1928970Poor
Fas 0902 over Creek2001900Fair
U.S. 270 over Creek1929900Fair
Fas 0936 over Creek1975890Fair
Britton Rd. over Kilpatrick Tp Under2000820Good
I-40 Frtg. Rd. EB over Reno Ave. Under2000820Good
I-40 Frtg. Rd. WB over Reno Ave. Under2000820Good
Kilp. Tp Ramp N-w over Reno Ave. Under2000820Good
NW 122ND St. over Kilpatrick Tp Under2000820Good
NW 23RD St. over Kilpatrick Tp Under2000820Good
NW 50TH St. over Kilpatrick Tp Under2000820Good
NW 63RD St. over Kilpatrick Tp Under2000820Good
Sara Rd. over Kilpatrick Tp Under2000820Good
Wilshire Blvd. over Kilpatrick Tp Under2000820Fair
U.S. 270 over Creek1929800Fair
U.S. 270 over Creek1929800Good
U.S. 270 over Creek1929800Good
U.S. 270 over Creek1929800Fair
D0983 (surrey H.) over Creek1990740Fair
D0983 (surrey H.) over Creek1990740Fair
Fau 3880 - Forman over UP R.R. Under and Creeks1974700Fair
N2740 over Creek1940700Good
SW 29TH St. over Mustang Creek1980700Fair
County Line Rd. over Creek1995690Good
Mustang Rd. over Creek1991690Fair
Mustang Rd. over Creek1991690Good
Mustang Rd. over Creek2009650Good
NW 122ND St over Creek2008650Good
E0890 over Creek2004600Good
Ashford Dr. over Creek1973500Good
Cemetery Rd. over Creek1980500Good
Cimarron Rd. over Creek1975500Fair
Cimarron Rd. over Creek1980500Poor
Coachman Dr. over Creek1971500Fair
E1060 (NW 10) over Shell Creek2003500Fair
I-40 Ramp/ Cnty Rd over Creek2016500Good
I-40 WB Ramp over Creek2016500Good
N2890 over Creek1952500Fair
N2930 Frisco Rd over Creek2017500Good
NW 116TH St. over Creek1971500Fair
Reno Ave. over Shell Creek1980500Fair
S Holly Ave. over Creek1956500Fair
SW 104TH St. over Creek1991500Fair
SW 44TH St. over Mustang Creek2006500Poor
0948C over Creek1998400Fair
Cavanaugh over Creek1941400Good
E Wagner Rd over Creek1979400Fair
E0950 over Creek2004400Fair
E1030 - Elm St. over Creek1928400Fair
Fas 0934 over N. Canadian River1986400Fair
Fau 3880 (foreman over Fourmile Creek1952400Poor
Fau 3961 (banner R over N. Canadian River1970400Fair
Methodist Rd. over I-40 Under1960400Good
N2890 over Creek1941400Good
N2890 over Sixmile Creek2003400Fair
Old U.S. 281 Spur over Creek1931400Good
Old U.S. 281 Spur over Creek1931400Good
Old U.S. 281 Spur over Creek1932400Good
SW 29TH St. over Creek1985400Fair
SW 29TH St. over Creek1992400Good
NW 122ND St. over Creek1996360Good
E1020 over Creek1928350Fair
E1020 over Creek1934350Fair
Sara Rd. over Deer Creek1992350Fair
S.H. 37 over Boggy Creek1984330Fair
E1070 over Creek1943310Good
E1070 over Unnamed Creek2009310Good
E0960 (NW 150TH) over Creek2009300Good
E0960 (NW 150TH) over Creek2014300Good
Fas 0904 (banner) over I-40 Under1966300Fair
Fas 3861 (cu Club) over I-40 Under1966300Fair
Fau 3880 (foreman over N. Canadian River1976300Fair
N2637 over Creek1968300Fair
N2640 over Creek1987300Fair
N2890 (banner Rd) over Purcell Creek2013300Good
N2890 over Purcell Creek2013300Fair
N2970 over Soldier Creek1995300Good
NW 10 St. over I-40 Under1966300Fair
Heaston Rd. over I-40 Under1961265Fair
E0910 over North Canadian River2009260Good
Fas 0938 over Creek1972260Fair
N2630 over Creek1983260Good
N2630 over Creek2005260Good
E1040 over Powder Face Creek1995250Good
N2730 over Creek1995250Fair
Red Rock Rd. over I-40 Under1961250Fair
E1120 over Arapaho Creek2020220Good
E1120 over Arapaho Creek2020220Good
E1070 over Creek1943210Good
E1110 Union City over Creek2021210Good
N2720 over S. Canadian River1988210Good
N2860 over Creek2011210Fair
Cimarron Rd. over I-40 Under1966200Fair
Colchester Court over Creek1994200Fair
County Line Rd. over Creek1980200Good
Courtney Rd. over I-40 EB Under1961200Fair
Courtney Rd. over I-40 WB Under1961200Good
E1020 (foreman Rd) over Creek2011200Good
E1023 over Creek1950200Good
E1026 - Jenkins St over Creek1960200Good
E1030 (elm St) over Creek1917200Poor
E1080 (SW 15TH) over Mustang Creek2009200Good
E1080 SW 15TH St. over Shell Creek2017200Good
E1150 SW 119TH St over Creek2008200Good
Fas 0935 over Creek1987200Fair
Fau 3870 (watts St over Creek1960200Good
Fau 3961 (banner R over Creek1960200Poor
Fau 3961 (banner R over Creek2001200Fair
Frisco Rd. over Creek1992200Fair
Morgan Rd. over Creek1958200Fair
Morgan Rd. over Deer Creek1992200Good
N. Richland over N. Canadian River1984200Fair
N2690 over Creek1997200Good
N2840 over Fourmile Creek1980200Poor
N2850 over Creek1932200Poor
N2850 over Creek2007200Good
N2920 (richland Rd over Creek2002200Good
N2920 Richland Rd over Shell Creek2019200Good
NW 23RD St. over Creek1930200Fair
SW 104TH St. over Dry Creek1983200Poor
SW 89TH St. over Creek1992200Good
SW 89TH St. over Creek1998200Fair
W Bass Ave over Creek1956200Fair
Westgate Dr. over Creek1996200Fair
Yukon Ave. over Creek1956200Good
N. Richland over Creek2006175Good
Fas 0938 over Creek1961170Fair
N2680 over Creek1984160Fair
E1042 (oak Ave) over Creek2015150Good
Richland Rd over Creek2017125Good
Manning Rd. over I-40 Under1966120Fair
Fort Reno Rd. over I-40 Under1961101Fair
N285.0 over I-40 Under1966101Fair
0924C over Creek1943100Good
0926C over Purcell Creek Br.1911100Poor
0972C over Soldier Creek1998100Good
3RD Street over Creek1970100Fair
Cemetery Rd. over Creek2007100Good
County Line Rd. over Creek1958100Fair
E0890 over Creek1991100Fair
E0890 over Trib. Winter Camp Creek1998100Good
E0900 over Creek1965100Fair
E0900 over Creek1987100Fair
E0900 over Creek1987100Poor
E0900 over Creek1987100Fair
E0900 over Creek2002100Fair
E0900 over Creek2013100Fair
E0900 over Creek2015100Good
E0900 over Creek2016100Good
E0900 over Creek2018100Fair
E0910/220th St NW over Creek2022100Good
E0920 over Creek1991100Poor
E0920 over Creek2009100Fair
E0920 over Creek2014100Fair
E0930 over N. Canadian River Trib.2005100Good
E0940 over N. Canadian River1987100Fair
E0940 over Uncle Johns Creek1987100Fair
E0960 (N. 150TH) over Uncle John Creek Trib.2016100Good
E0970 over Creek1986100Poor
E0970 over Creek1986100Fair
E0980 over Creek1983100Fair
E0980 over Creek2019100Good
E0990 over Six Mile Creek1952100Fair
E1000 over Creek1975100Fair
E1000 over Creek2007100Fair
E1010 over Creek1987100Fair
E1010 over Creek1986100Fair
E1030 over Creek1986100Fair
E1030 over Creek2000100Fair
E1030 over Creek2021100Good
E1030 over Sixmile Creek2005100Fair
E1040 over Creek2018100Fair
E1040 over S. Canadian Riv Trib.2002100Good
E1050 over Creek1971100Poor
E1050 over Creek1971100Poor
E1050 over Creek1992100Good
E1050 over Creek1996100Fair
E1050 over Creek1986100Fair
E1060 (NW 10TH St) over Creek2005100Fair
E1060 over Creek1975100Poor
E1060 over Creek2004100Fair
E1060 over Creek2009100Fair
E1060 over Purcell Creek1993100Fair
E1070 over Creek2011100Fair
E1070 over Creek2015100Good
E1080 over Creek1996100Fair
E1080 over Creek1999100Fair
E1080 over Creek2020100Good
E1090 over Creek1927100Fair
E1090 over Creek1928100Fair
E1090 over Creek1946100Fair
E1100 over Creek1987100Fair
E1100 over Creek2004100Good
E1100 over Creek2014100Good
E1100 over Creek2016100Good
E1100 over Creek2019100Good
E1110 over Creek1996100Fair
E1110 over Creek1998100Fair
E1110 over Creek2012100Good
E1110 over Creek2014100Fair
E1120 over Creek1987100Fair
E1120 over Creek1989100Fair
E1130 over Creek1987100Fair
Elm Street over I-40 Under1966100Fair
Fas 0930 over Creek2002100Fair
Fas 0938 over Creek1996100Fair
Fau 388 (foreman) over Creek2004100Fair
Fau 3880 (foreman over Creek1990100Fair
Grand Ave over Fourmile Creek1970100Fair
Gregory Rd. over I-40 Under1966100Fair
IRR N278 Brinkley over Creek2021100Good
Irr E0930 over Creek1998100Fair
Irr E0960 over Uncle Johns Creek Trib.2013100Good
Irr E1022 (rogers) over Creek1980100Good
Irr E1050 over Creek1921100Fair
Irr E1050 over Creek2013100Good
Irr E1130 over Creek2016100Fair
Irr Fas 0931 over Creek1991100Fair
N Frisco Rd over Creek2004100Good
N2640 over Creek1996100Fair
N2660 over Creek1993100Good
N2670 over Buggy Creek Trib.1998100Good
N2670 over Creek1990100Fair
N2690 over Buggy Creek2009100Good
N2690 over Creek1983100Fair
N2690 over Creek1980100Fair
N2690 over Creek1985100Fair
N2700 over Creek1996100Fair
N2700 over Creek1996100Fair
N2720 over Creek1938100Fair
N2720 over Unnamed Creek2009100Good
N2740 over Creek2004100Good
N2760 over Creek1989100Fair
N2760 over Creek2004100Fair
N2770 over Creek1982100Fair
N2770 over Creek1982100Good
N2770 over Creek1987100Fair
N2770 over Six Mile Creek1981100Fair
N2780 over Six Mile Creek2016100Good
N2790 over Creek2020100Good
N2800 Irr over Creek2022100Good
N2800 over Creek2011100Fair
N2820 over Creek1991100Fair
N2830 over Creek2006100Fair
N2830 over N. Canadian River1925100Poor
N2840 over Creek1925100Fair
N2850 over Creek1987100Fair
N2850 over Creek2011100Fair
N2850 over Creek2016100Poor
N2860 over Creek1986100Fair
N2860 over Creek1987100Fair
N2860 over Creek2019100Good
N2860 over Sixmile Creek1986100Fair
N2870 over Creek1989100Fair
N2870 over Creek2004100Fair
N2870 over Creek2019100Good
N2880 (manning St) over Purcell Creek2014100Good
N2880 over Creek2013100Good
N2880 over Sixmile Creek1987100Good
N2890 over Uncle Johns Creek1988100Fair
N2900 over Creek1986100Fair
N2900 over Creek1998100Fair
N2900 over Creek2001100Fair
N2910 over Creek1990100Fair
N2910 over Creek1994100Fair
N2910 over Unnamed Creek2009100Good
N2920 over Creek1921100Fair
N2920 over Creek2000100Fair
N2920 over Creek2007100Good
N2970 over Unnamed Creek2009100Good
N2980 over Creek1980100Fair
Poplar Ave. over Creek1990100Fair
Richland Rd. over Creek1940100Fair
Richland Rd. over Creek1964100Fair
Rogers St. over Creek1974100Fair
SW 104TH St. over Creek1996100Fair
Von. Elm Pl. over Creek1980100Good
Woodson St. over Creek1974100Fair
E1080 (SW 15TH) over Creek200380Fair
D0904 over Creek192875Good
SW 119TH St. over Creek199975Fair
N2910 (cimarron) over Shell Creek201570Good
DRIVE B from SH 4 over Creek202050Good
E0940 over N. Canadian River Trib.200950Good
E1030 over Sixmile Creek194250Fair
N2720 over Creek201150Fair
N2720 over Creek201750Fair
N2830 over Creek200550Fair
Gregory Rd. over Dry Creek199730Fair
Richland Rd. over Creek200030Fair
NW 23RD St. over Shell Creek199825Fair
County Line Rd. over Creek199720Fair
N2870 over Creek201310Fair

Source: FHWA National Bridge Inventory, 2025.

Canadian County bridge conditions · Oklahoma bridges by county.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.