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145 APPENDIX F Details for Inspection Types and Intervals TABLE F1 INSPECTION INTERVALS--ROUTINE INSPECTION Bridges and Culverts Routine Inspection Interval, Months DOT <12 12 24 36 48 Alabama 242 2,532 12,913 0 16 Alaska 0 1 1,177 0 0 Arizona 0 37 3,963 0 3,206 Arkansas 6 1,942 9,928 0 606 California 47 52 23,907 0 17 Colorado 10 71 7,012 0 1,185 Connecticut 16 19 3,897 0 236 Delaware 2 15 834 1 0 Dist. of Columbia 0 0 244 0 0 Florida 60 383 11,091 0 0 Georgia 7 20 14,492 0 1 Hawaii 1 15 1,090 0 0 Idaho 0 614 3,448 0 10 Illinois 2 529 14,392 0 10,883 Indiana 2 3 18,269 0 0 Iowa 16 1,251 23,586 0 0 Kansas 25 2,105 23,183 0 3 Kentucky 49 1,374 9,808 0 2,291 Louisiana 62 1,129 12,160 0 0 Maine 0 43 2,322 0 5 Maryland 10 376 4,685 0 12 Massachusetts 139 377 4,402 0 0 Michigan 145 240 10,233 0 1 Minnesota 4 3,721 9,294 15 0 Mississippi 56 1,822 14,933 0 93 Missouri 0 1,409 22,468 0 2 Montana 2 7 4,074 0 846 Nebraska 0 173 15,281 0 0 Nevada 5 30 1,598 0 1 New Hampshire 148 222 2,001 0 0 New Jersey 1 3 6,437 0 3 New Mexico 4 217 2,276 0 1,322 New York 3 1,361 15,978 0 0 North Carolina 2 3 17,497 0 0 North Dakota 2 44 3,980 0 452 Ohio 41 28,019 5 0 0 Oklahoma 33 1,085 21,934 0 335 Oregon 14 300 6,924 0 13 Pennsylvania 190 1,652 20,361 0 4 Puerto Rico 8 42 1,978 0 0 Rhode Island 2 118 629 0 0 South Carolina 2 2,793 6,408 0 0 South Dakota 2 44 5,473 0 441 Tennessee 0 5 19,724 0 31 Texas 98 225 44,297 0 4,598 Utah 1 5 2,822 0 0 Vermont 0 52 2,651 0 0 Virginia 37 2,169 11,032 0 8 Washington 14 506 6,706 2 414 West Virginia 70 951 4,205 0 1,688 Wisconsin 48 54 13,589 0 0 Wyoming 1 203 2,822 1 2 Total 1,629 60,363 504,413 19 28,275 Source: 2005 NBI data (2). Note: Not all inspection intervals are shown.

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146 TABLE F2 INSPECTION INTERVALS--UNDERWATER INSPECTION Bridges and Culverts Total Underwater Inspection Interval, Months DOT Inspections 72 Alabama 945 0 19 613 0 297 16 0 0 Alaska 175 0 0 9 0 0 166 0 0 Arizona 12 1 4 1 0 0 3 3 0 Arkansas 7,536 3 260 1,064 28 5,227 954 0 0 California 638 0 1 6 1 26 603 0 0 Colorado 75 5 1 6 1 0 62 0 0 Connecticut 309 4 5 294 0 6 0 0 0 Delaware 77 0 1 1 0 4 71 0 0 Dist. of Columbia 13 1 0 6 0 0 6 0 0 Florida 3,950 37 165 3,735 0 1 1 0 0 Georgia 2,170 0 0 2 0 38 2,130 0 0 Hawaii 102 3 0 2 0 0 97 0 0 Idaho 306 0 5 1 0 1 299 0 0 Illinois 1,293 0 340 401 5 46 501 0 0 Indiana 710 1 9 36 14 180 470 0 0 Iowa 144 19 3 18 0 5 97 0 0 Kansas 201 1 2 14 1 41 142 0 0 Kentucky 2,147 2,015 1 2 0 21 107 0 0 Louisiana 1,198 27 54 260 0 0 856 0 0 Maine 371 0 4 28 0 1 338 0 0 Maryland 421 0 1 2 0 357 61 0 0 Massachusetts 756 0 46 40 556 56 44 0 0 Michigan 353 43 2 79 1 17 208 0 0 Minnesota 338 0 0 0 0 1 337 0 0 Mississippi 304 0 0 2 0 0 302 0 0 Missouri 174 0 0 9 2 4 159 0 0 Montana 499 4 0 1 0 364 130 0 0 Nebraska 95 0 0 0 0 0 95 0 0 Nevada 122 0 0 54 0 67 1 0 0 New Hampshire 137 2 1 5 0 2 120 0 0 New Jersey 708 0 1 150 0 516 41 0 0 New Mexico 7 0 0 0 0 0 7 0 0 New York 804 0 0 1 0 0 803 0 0 North Carolina 2,142 0 4 351 0 1,784 3 0 0 North Dakota 38 0 0 0 0 0 37 1 0 Ohio 290 8 5 8 9 1 257 0 2 Oklahoma 71 0 0 1 0 0 70 0 0 Oregon 676 16 72 128 0 392 68 0 0 Pennsylvania 3,881 9 81 3,697 5 79 8 0 0 Puerto Rico 30 1 4 14 5 6 0 0 0 Rhode Island 89 0 0 0 0 2 87 0 0 South Carolina 241 0 0 1 0 218 22 0 0 South Dakota 112 0 0 0 0 0 112 0 0 Tennessee 543 0 0 1 0 17 525 0 0 Texas 796 4 11 24 2 2 753 0 0 Utah 78 0 0 3 0 0 75 0 0 Vermont 53 0 1 4 2 44 2 0 0 Virginia 697 0 2 5 0 4 686 0 0 Washington 315 5 3 12 4 6 280 0 0 West Virginia 256 0 6 1 0 1 248 0 0 Wisconsin 276 0 0 0 0 1 275 0 0 Wyoming 61 0 0 0 0 0 61 0 0 Total 37,735 2,209 1,114 11,092 636 9,835 12,796 4 0 Source: 2005 NBI data (2). Note: Not all inspection intervals are shown.

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147 TABLE F3 INSPECTION INTERVALS--FRACTURE-CRITICAL INSPECTION Bridges and Culverts Total Fracture Inspection Interval, Months DOT Critical 48 Alabama 260 21 94 145 0 0 0 Alaska 103 9 2 53 0 39 0 Arizona 65 10 12 28 0 2 13 Arkansas 347 4 320 23 0 0 0 California 1,007 6 15 978 0 0 8 Colorado 207 32 8 166 0 0 1 Connecticut 169 0 5 164 0 0 0 Delaware 29 1 4 24 0 0 0 Dist. of Columbia 13 1 0 11 0 0 0 Florida 339 2 119 217 0 1 0 Georgia 82 0 81 1 0 0 0 Hawaii 10 2 0 8 0 0 0 Idaho 173 3 91 77 0 1 1 Illinois 550 0 17 453 0 9 71 Indiana 523 12 45 464 0 0 2 Iowa 1,660 16 502 1,140 0 0 2 Kansas 1,109 6 586 383 2 48 78 Kentucky 349 60 3 280 0 0 6 Louisiana 142 3 53 86 0 0 0 Maine 45 0 3 42 0 0 0 Maryland 285 3 52 196 0 0 34 Massachusetts 329 6 2 320 0 0 0 Michigan 105 22 11 31 12 0 0 Minnesota 248 0 0 1 0 84 163 Mississippi 244 0 111 133 0 0 0 Missouri 1,589 0 12 1,576 0 0 0 Montana 310 0 1 309 0 0 0 Nebraska 1,289 1 130 1,158 0 0 0 Nevada 34 7 7 20 0 0 0 New Hampshire 144 25 43 74 0 0 2 New Jersey 652 2 5 639 0 4 1 New Mexico 53 3 47 3 0 0 0 New York 1,777 0 436 1,341 0 0 0 North Carolina 140 0 1 139 0 0 0 North Dakota 239 0 0 5 0 9 225 Ohio 1,099 23 1,026 32 2 0 16 Oklahoma 754 21 348 385 0 0 0 Oregon 347 4 9 322 0 0 12 Pennsylvania 1,896 44 455 1,375 0 12 7 Puerto Rico 22 1 12 6 0 0 0 Rhode Island 35 1 34 0 0 0 0 South Carolina 65 0 37 28 0 0 0 South Dakota 228 0 29 199 0 0 0 Tennessee 271 0 5 263 0 0 0 Texas 624 2 21 232 0 0 369 Utah 62 0 0 62 0 0 0 Vermont 161 0 8 153 0 0 0 Virginia 344 11 287 37 0 6 2 Washington 364 11 4 342 0 0 7 West Virginia 563 6 186 368 0 0 3 Wisconsin 116 1 1 114 0 0 0 Wyoming 97 2 12 10 0 73 0 Total 21,668 384 5,292 14,616 16 288 1,023 Source: 2005 NBI data (2). Note: Not all inspection intervals are shown.

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148 TABLE F4 PERIODIC TASKS IN ROUTINE INSPECTION DOT Inspection Scope Interval Notes Eastern Federal Cross-channel profile Component 24 months Along substructures Lands Vertical clearance Component 24 months Clearance <16 ft Vertical clearance Component 72 months Clearance >16 ft Vertical clearance Component 72 months Clearance <16 ft, agricultural crossing Missouri Wading Component 2460 months During routine inspection New Jersey Underwater Type 1 24 months Channel cross section and scour evaluation; no diver New York Fathometer readings Component 24 months Scour documentation for bridges along fascias + over water profiles along substructures Oregon Cross-channel profile Component As work load Bridge is not scour critical permits Cross-channel profile Component At next regular Scour critical inspection Cross-channel profile Component 24 months Channel condition (61) 5 or less Cross-channel profile Component 24 months Scour SmartFlag in state 2 or 3 Cross-channel profile Component 48 months Scour code (113) is 3 or U Cross-channel profile Component 48 months Channel condition (61) > 6 Cross-channel profile Component 48 months Scour SmartFlag in state 1 Cross-channel profile Component 120 months Scour code (113) is 4 or greater Cross-channel profile Component 120 months Channel condition (61) > 7 Cross-channel profile Component 120 months Scour SmartFlag not on Timber member Component Immediate Hollow sound, borer or beetle boring report activity, bulging, splits, cracks noted during routine inspection Timber member Component 96 months Structure located west of the boring report Coast Range and in service longer than 20 years Timber member Component 120 months Structure located in western boring report Oregon and in service longer than 25 years Timber member Component 144 months Structure located east of the boring report Cascades and in service longer than 30 years Pennsylvania Routine, close-up, Component 72 months Areas without hands-on in other hands-on routine inspections, as noted in inspection report Tennessee Cursory--substructure Component 24 months Substructure in shallow water

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149 TABLE F5 ACCESS FOR ROUTINE INSPECTION DOT Inspection Scope Interval Notes Connecticut Box beams--Bridges Component Interior inspection full length for with three or more box every cycle beams Eastern Federal Interior of box girders Component Enter every inspection Lands UBIV Component 120 months High bridge (>40 ft) UBIV--Bearings Component 120 months Bearings not fully visible Idaho Confined space Component inspection Reach-all inspection Component 48 months Iowa Limited--Not close up Entire 24 months Bridges in good condition and not fracture critical Can replace 1 or 2 cycles of routine inspection; by NBIS team leader Regular--Close-up as Entire 48 months For bridges getting limited needed inspections, but subject to scour Regular--Close-up as Entire 72 months For bridges getting limited needed inspections Maryland Confined spaces Component inspection New Jersey UBIV Component Snooper inspections New York Access equipment Component Bridge files show need for special equipment during inspection Ohio Access equipment Component Require riggers, divers, or other personnel with special skills Oklahoma Long and tall bridges Component Snooper inspection of "Long and Tall" bridges that are not fracture critical Oregon Interior of box girders Component Every cycle Elements visible only from inside Interior of box girders Component Every cycle If signs of active corrosion Interior of box girders Component Every cycle If fatigue cracking is noted Interior of box girders Component 48 months Areas where water is known to puddle Interior of box girders Component 72 months Curve girders subject to out-of- plane distortion Interior of box girders Component 120 months All box girder sections Major bridge inspection Entire Requires climbing or special skills UBIV Tall bridge requiring UBIV Pennsylvania Access equipment Component Areas needing special access by only--A cranes, lifts, rigging, etc. UBIV = under bridge inspection vehicle; NBIS = National Bridge Inspection Standards.

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150 TABLE F6 ROUTINE INSPECTION OF STRUCTURE TYPES AND DETAILS DOT Inspection Scope Interval Note Alabama Special A--Segmental concrete Special B--Cable stayed Special C--Suspension and movable bridges Special J--Long-span metal culverts and structural plate culverts Alaska Cathodic protection Component system inspections California Special feature--Close Component Fatigue-prone details that are up not fracture critical Florida Cantilever superstructure Component Inspect pin and hanger Illinois Fatigue prone Component Fatigue-prone details Pin and hanger Component Pins and hangers in the main load-carrying elements Iowa Intermediate fatigue, Component 12, 24, or 36 Mid-interval inspection for close-up months fatigue-vulnerable bridge Pin, hanger Component 60 months Using NDT Fatigue, close-up Component 72 months Fatigue-vulnerable bridges; not fracture critical; no cracks Michigan Segmental, Segmental post-tensioned post-tensioned bridges Hydraulic engineering Inspections related to hydraulic engineering Montana Pin and hanger Component 48 months Pin and hangar for redundant structure New Jersey Pin and hanger Component Pin and hanger assemblies North Dakota Segmental box bridges Segmental box bridges Ohio Accessories Lighting, fencing, glare screen, splash guard, catwalks, other Oklahoma Electronic distance meter Component Monitor pier movement Oregon Major bridge inspection Unusual or complex features Major bridge inspection Inordinate amount of time required Suspension span Suspension bridge Cable-stayed span Cable-stayed bridge Pennsylvania Critical elements Component Critical elements of complex structures may be inspected separately using special equipment or personnel Prestressed concrete Prestressed concrete segmental segmental bridges Rhode Island Concrete segmental Concrete segmental bridge bridge Tied-arch bridge Tied-arch bridge Tennessee Suspension bridge Suspension bridge Cable-stayed bridge Cable-stayed bridge Texas External post-tensioned External post-tensioned tendons tendons (continued )

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151 TABLE F6 (Continued) ROUTINE INSPECTION OF STRUCTURE TYPES AND DETAILS DOT Inspection Scope Interval Note Virginia Routine 12 months Concrete structure with unknown reinforcing details Pin and hanger Component Pin and hangers Pin and hanger--UT Component During Redundant structures with new scheduled or newly replaced pins inspection Fatigue prone Component Fatigue-prone details Washington Special feature-- High-strength steel High-strength steel Special feature-- Pins/hangers; redundant Pins/hangers, redundant structure structures Special feature--Floating 12 months Floating bridge; inspect for bridge water tightness of pontoons Special feature-- 12 months Segmental bridge Segmental bridge Special feature-- 12 months Suspension bridge Suspension bridge Special feature-- 12 months Cable-stayed bridge Cable-stayed bridge Floating bridge-- Component 24 months Electrical and mechanical Equipment systems UT = ultrasonic testing.

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152 TABLE F7 ROUTINE, HANDS-ON INSPECTION DOT Name Location on Component Notes Alabama Routine Most routine inspections are hands-on Special D--Pin Close-up inspection of pin and hanger and hanger details Alaska Routine Extent of hands-on varies as needed Arizona Hands-on Locations identified in Extent of hands-on varies as needed report Arkansas Hands-on Locations identified in Extent of hands-on varies as needed report and in database California Hands-on Electronic notes; not Extent of hands-on varies as needed searchable Connecticut Hands-on Locations identified in Extent of hands-on varies as needed report; excluded areas also noted 100% hands-on Box beams--Curved 100% hands-on Box beams--Bridges with one or two box beams 100% hands-on Tension members of trusses 100% hands-on Welded connections for lateral bracing 100% hands-on All nonredundant members 100% hands-on Rusted areas of members 100% hands-on All bearings 100% hands-on Metal deck connections 100% hands-on Welds in tension 100% hands-on Repaired welds 100% hands-on Fatigue-prone welds Delaware Hands-on Locations identified in Extent of hands-on varies as needed report Eastern Federal Hands-on Some post-tensioned structures; every Lands cycle Hands-on Bearings, if accessible Post-tensioned Every square foot must be viewed; use box girders UBIV as required. Hands-on At least some sounding of concrete Hands-on At least some probing of timber Hands-on Clean and inspect representative area of bearings Florida Locations identified in Extent of hands-on varies as needed report Idaho Hands-on Locations identified in Extent of hands-on varies as needed report and in database Iowa Hands-on Locations identified in Extent of hands-on varies as needed report and in database Kentucky Hands-on Locations identified in Extent of hands-on varies as needed report and in database Maine Hands-on Locations identified in Extent of hands-on varies as needed electronic report, not database Maryland Hands-on Locations identified in Extent of hands-on varies as needed report and in database Michigan Hands-on Locations identified in Extent of hands-on varies as needed web-based report Missouri Hands-on Locations identified in Extent of hands-on varies as needed report and in database (continued )

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153 TABLE F7 (Continued) ROUTINE, HANDS-ON INSPECTION DOT Name Location on Component Notes Nevada Hands-on Locations identified in Extent of hands-on varies as needed report and in database New Jersey Hands-on Tension areas of steel boxes Steel pier caps Steel two-girder bridges New York Special emphasis Locations identified in Nonredundant metal superstructure hands-on, 0.5 m report Special emphasis Locations identified in Fracture-critical metal superstructure hands-on, 0.5 m report Special emphasis Locations identified in Stringers within 1 m of connection to hands-on, 0.5 m report floorbeam Special emphasis Locations identified in Pin/hanger + main member within 1 m hands-on, 0.5 m report Special emphasis Locations identified in Fatigue-vulnerable elements hands-on, 0.5 m report Special emphasis Locations identified in Welded backup bars hands-on, 0.5 m report Special emphasis Locations identified in Welded tension areas and stress reversal hands-on, 0.5 m report areas Special emphasis Locations identified in Welded repairs to main members hands-on, 0.5 m report Special emphasis Locations identified in Bearing stools fabricated from welded hands-on, 0.5 m report shapes Special emphasis Locations identified in Splices in multispan through girders hands-on, 0.5 m report Special emphasis Locations identified in Details subject to out-of-plane distortion hands-on, 0.5 m report Special emphasis Locations identified in Concrete deck haunches hands-on, 0.5 m report Special emphasis Locations identified in Steel staggered diaphragms hands-on, 0.5 m report North Carolina Hands-on Locations identified in Extent of hands-on varies as needed report North Dakota Hands-on Locations identified in Extent of hands-on varies as needed electronic report Ohio Hands-on Locations identified in Extent of hands-on varies as needed report and in database Oregon Hands-on Locations identified in Extent of hands-on varies as needed report and electronic notes Pennsylvania Hands-on Locations identified in Vulnerable areas, poor condition areas report and in database Hands-on Locations identified in Any component without hands-on report and in database inspection in 72 months Hands-on Locations identified in Load-carrying members in poor report and in database condition Hands-on Locations identified in Fracture-critical member with less than report and in database 10 years remaining life Hands-on Locations identified in Fracture-critical member where report and in database displacement-induced fatigue is critical Hands-on Locations identified in Redundancy retrofit systems (e.g., report and in database catcher beams) for fracture-critical details (pin and hangers, etc.) Hands-on Locations identified in Critical sections of controlling members report and in database on posted bridges Hands-on Locations identified in Scour-critical substructure units report and in database Hands-on Locations identified in End regions of steel girders or beams report and in database under deck joint Hands-on Locations identified in Cantilever portions of concrete piers or report and in database bents in fair or lesser condition (continued )

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154 TABLE F7 (Continued) ROUTINE, HANDS-ON INSPECTION DOT Name Location on Component Notes Hands-on Locations identified in Ends of prestressed concrete beams at report and in database continuity diaphragms Hands-on Locations identified in Precast concrete bridge parapets report and in database Rhode Island Hands-on All routine inspections are hands-on Tennessee Hands-on Routine inspections are hands-on Texas Hands-on Locations identified in Extent of hands-on varies as needed report Vermont Hands-on Locations identified in Extent of hands-on varies as needed report Virginia Hands-on Locations identified in Extent of hands-on varies as needed report Fatigue prone AASHTO fatigue categories D or worse and ADTT 500 or more AASHTO fatigue categories D or worse and Interstate route Washington Hands-on Locations identified in Most routine inspection is hands-on; report and in electronic extent of hands-on varies as needed notes West Virginia Hands-on Locations identified in Extent of hands-on varies as needed report and in electronic notes UBIV = under bridge inspection vehicle; ADTT = average daily truck traffic.

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155 TABLE F8 IN-DEPTH INSPECTIONS DOT Name Scope Interval Notes Connecticut Class I in-depth Entire 120 Team is Lead Inspector and Bridge months Inspector; hands-on entire deck soffit max. In place of hands-on inspection that cycle Senior engineer must be present. Includes stream cross sections; new clearance diagram Class II in-depth Entire 120 Team is Lead Inspector and Bridge months Inspector with 25% time of Engineer max. III for critical parts. Hands-on entire deck soffit In place of hands-on inspection that cycle Senior engineer must be present. Includes stream cross sections; new clearance diagram Class II in-depth Entire 120 Team is Lead Inspector and Bridge months Inspector with Engineer III leading the max. inspection. Hands-on entire deck soffit In place of hands-on inspection that cycle Senior engineer must be present. Includes stream cross sections; new clearance diagram In-depth (all bridge Entire Deck survey. Half-cell potentials for classes) exposed concrete surface. Hammer tapping of all cracked areas. Chain drag all surfaces Hands-on access to entire superstructures; maps of damage/loss. Ultrasonic testing of all nonredundant pins and hangers. 3 ft distance is OK. Ultrasonic testing on welds in fracture- critical members. 10 ft x 10 ft sounding grid for channel Measure all expansion bearings. Tap all anchor bolts. Probing of 50% of timber members. Arch profile against springline Plumb bob check for all substructure units In-depth (all culvert Entire Culverts measure water velocity classes) upstream, downstream, and hydraulic opening Florida In-depth pin/hanger Component 24 Ultrasonic inspection of pins and months hangers for suspended spans Storm event--Level 3 In-depth inspection based on findings of Level 1 or 2 inspection Michigan 25-year-old bridge Entire Do "Detail" inspection Fatigue-prone details Component 36 Redundant bridges having fatigue-prone months details New Jersey Fracture critical Entire 48 Alternate inspection cycles months (continued )

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159 TABLE F10 FRACTURE-CRITICAL INSPECTIONS DOT Name Scope Interval Notes Alabama Fracture-critical details Component 24 months Connecticut Fracture critical-- Rotating 25% of details receive hands-on secondary roads Bridges not on Interstate or other limited- access highway Eastern Federal Fracture critical Component 24 months Fracture-susceptible bridges Lands Fracture critical w/NDE Component 120 months Includes use of nondestructive testing UBIV fracture critical Component Iowa Fatigue Component 24 months Fracture-critical bridges, bridges with arrested cracks Minnesota Fracture critical 12 months Missouri Comprehensive fracture-critical inspection Most fracture-critical member Montana Fracture critical Component 24 months New Jersey Fracture critical Component 24 months Hands-on for vulnerable areas and details Fracture critical-- Entire 48 month In-depth for alternate inspection cycles In-depth North Carolina Fracture critical Rhode Island Fracture critical 12 months Oregon Level 2-- Component 12 months Base metal is ASTM A7, A8, A94, A242, Fracture-critical A440, A514, or A517 steel inspection Level 2-- Component 24 months Age of structure > 30 years Fracture-critical ADTT > 1000 inspection Level 2-- Component 48 months Age of structure < 30 years Fracture-critical ADTT < 1000 inspection Level 2-- Component Base metal has low values of toughness in Fracture-critical field situations; similar to A514 or A517 inspection Level 2-- Component Nonredundant riveted or bolted members in Fracture-critical tension inspection Level 2-- Component Bending with no welding present Fracture-critical inspection Level 2-- Component Detail vulnerable to fatigue or collision Fracture-critical damage inspection Level 2-- Component Nonredundant riveted or bolted members with Fracture-critical tack welding present inspection Level 2-- Component Nonredundant welded members in bending Fracture-critical inspection Level 2-- Component Nonredundant welded members in direct Fracture-critical tension inspection Level 2-- Component Pin and hanger assembly--Perform an initial Fracture-critical UT of the pin and hangers and follow-up at inspection least every 4 years Level 2-- Component E or E' detail--Perform an initial UT of the Fracture-critical detail and follow up at least every 4 years inspection Level 2-- Component 72 months Age of structure > 30 years Fracture-critical Rolled members with no welds present inspection (continued )

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160 TABLE F10 (Continued) FRACTURE-CRITICAL INSPECTIONS DOT Name Scope Interval Notes Level 2-- Component ADTT > 1,000 Fracture-critical Rolled members with no welds present inspection Level 2-- Component 120 months Age of structure < 30 years Fracture-critical Rolled members with no welds present inspection ADTT < 1,000 Rolled members with no welds present Pennsylvania In-depth--Fracture Entire 120 months Fracture-critical member in fair or lesser critical condition Span 150 ft 180 months Fracture-critical member in good condition Virginia Fracture critical Component 12 months Washington Fracture critical Component 24 months Wisconsin Fracture critical Component 72 months UBIV = under bridge inspection vehicle; UT = ultrasonic testing ; NDE = nondestructive evaluation; ADTT = average daily truck traffic.

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161 TABLE F11 COMPLEX BRIDGES, INSPECTIONS, AND TEAMS Complex DOT Staff/Training Complex Inspections and Structures Alabama Master list of structures with unique or special features Alaska Yes Yes Arizona Arkansas California Experience, No formal designations of structures or methods, but engineering but not oversight and judgment within districts training Engineers investigate inspection practices for the "complex" bridges in their inventories and apply them to their inspections. Connecticut Yes Formal definition of three levels of structural complexity with defined team size and technical grade Delaware Yes Dye-Penetrant Test Training UBIV/Snooper Training for driving and operation Florida Yes Managers/supervisors provide technical guidance to inspection team training: Complex Bridge Inspection Course Movable Bridge Inspection Course Inspection Procedures for Trunnion Shafts of Vertical Lift Bridges Hanger and Pin Assemblies of Cantilever Superstructure Systems Iowa Yes Kentucky Yes Specific training or experience for some inspections Maine Yes Maryland Yes Drawbridge inspections require electrical and mechanical engineers for equipment Michigan Yes Segmental post-tensioned bridges Some inspections related to hydraulic engineering Montana Yes Master list of bridges with special features. These must receive special inspections Inspection team will include specialists, as needed Nevada New Jersey Yes Open-deck railroad bridges--Special attention to condition of ties Ultrasonic inspections Movable bridges New Mexico New York No Require all inspectors to handle any bridge Inventory indicates need for special equipment during inspection North Carolina No Require all inspectors to handle any bridge North Dakota Yes Training for segmental box bridges Ohio Yes Major bridges identified by span length and structure type Inspectors must demonstrate adequate experience In-depth inspection may require riggers, divers, or other personnel with special skills Oklahoma Yes Snooper inspection of "Long and Tall" bridges that are not fracture critical Monitoring pier movement with an electronic distance measuring device Oregon Yes Special expertise or equipment may be needed for: Movable bridge Suspension or cable-stayed bridge Tall bridge (continued )

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162 TABLE F11 (Continued) COMPLEX BRIDGES, INSPECTIONS, AND TEAMS Complex DOT Staff/Training Complex Inspections and Structures Pennsylvania Yes Prestressed concrete segmental bridges More experienced team leaders are used for more complex inspections Critical elements of complex structures may be inspected separately for use of special equipment or personnel Consultants hired for complex inspection by central office Rhode Island Yes One concrete segmental bridge One tied-arch bridge South Dakota No No complex bridges identified Tennessee No Movable, suspension, or cable-stayed bridges Other bridges with unusual characteristics No special qualifications for personnel Texas Yes Unusual features such as external post-tensioned tendons For complex bridge inspections, consultants must have as project manager a PE with 7 years bridge inspection experience and BIRM training. At least one year of experience must be with complex bridges. The team leader for complex inspections must have 6 years bridge inspection experience and BIRM training. Utah Yes Yes Vermont Virginia Yes Movable bridge team is an electrical engineer, a bridge safety engineer, and a mechanical engineer. Washington Yes DOT keeps master list of bridges with special features or needing special equipment. Bridge Preservation Office has Special Structures Unit for complex types including: Movable bridges Floating bridges Suspension bridges Cable-stayed bridges Precast segmental bridges Ferry terminals West Virginia No No UBIV = under bridge inspection vehicles; BIRM = Bridge Inspector's Reference Manual.

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163 TABLE F12 ROUTINE INSPECTIONS OF MOVABLE BRIDGES DOT Name Scope Interval Note Alabama Special C-- Entire Suspension and movable bridges Florida Movable bridge 12 months Poor condition Movable portion Operation 12 months Maryland Drawbridge Equipment Team has electrical engineer and mechanical engineer Michigan Movable equipment, Equipment 72 months Movable bridge equipment routine New Jersey Movable Bridge-- Equipment In-depth electrical, mechanical equipment Type I inspection Movable Bridge-- Equipment Medium-depth electrical, mechanical Type II equipment inspection Movable Bridge-- Equipment Visually monitor operation of electrical, Type III mechanical equipment North Movable span Carolina inspections Oregon Movable bridge Entire 12 months Cursory inspection for operation Virginia Movable bridge Special team having an electrical engineer, a bridge safety engineer, and a mechanical engineer Washington Movable bridge Operation 1 month Trial opening of span operation Special feature-- 12 months Inspector has special training or Movable experience Movable bridge Equipment 72 months In-depth for electrical and mechanical equipment equipment Wisconsin Movable bridge 12 months

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164 TABLE F13 ROUTINE INTERIM INSPECTION DOT Inspection Scope Interval Notes Alabama Special K-- Posted bridge Interim inspection Special L-- Bridges with condition codes of 4 or less Interim inspection Connecticut Interim--Load Component Posted bridge posted Interim--Pin Component Monitor pin and hanger and hanger Eastern Interim-- Priority A--zero remaining life Federal Structurally Priority B--2 to 5 years remaining life Lands deficient Florida Interim Component Condition rating <5 Regular Entire 6 months Condition rating 3, for deck, superstructure, substructure, channel, culvert, or approach roadway Regular Entire 12 months Condition rating = 4, for deck, superstructure, substructure, channel, culvert, or approach roadway Maryland Out-of-cycle Component inspection Michigan Bridge deck Component 9 to 15 Deck condition rating = 3 months Concrete Component 9 months Substructure condition rating = 3 substructure max. 15 months Substructure condition rating = 4 max. Concrete tee Component 9 months High-load hit--Rebar exposed beam max. 15 months Main rebar exposed max. Posted-- 9 months Weakened by deterioration Deterioration max. Posted--Design 9 to 15 Designed to lower standard months Prestressed box Component 15 months Shear cracks beam max. Beam exhibits lateral movement Prestressed I Component 9 months Loss of bearing at two adjacent beams beam max. 15 months Loss of bearing/spall max. Scour critical 15 months On scour critical list max. Steel Component <6 months Steel section loss 25% superstructure Fatigue cracks 9 months High-load hit max. Temporary supports for beams New Jersey Interim Component 12 months Load posted for operating rating inspection Superstructure condition rating 3 or less Substructure condition rating 3 or less New York Fathometer Component 12 months Scour rating 1 or 2. Active structural flag for survey, channel scour cross section 24 months Scour rating 3 Interim Entire 12 months General recommendation 3, assigned by (Type 2) inspector Interim Entire Condition rating weighted average 3, (Type 2) computed by NYSDOT data system Interim Entire Inactive red flag or active yellow flag (Type 2) Interim Entire Posted bridge (Type 2) Interim Entire Poor condition (Type 2) (continued )

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165 TABLE F13 (Continued) ROUTINE INTERIM INSPECTION DOT Inspection Scope Interval Notes Interim Entire Unrepaired critical findings (Type 2) Interim Entire Posted bridge (Type 2) Ohio Interim <12 General appraisal 2 or less (9 to 0 scale, "2" months is critical) Drastic load reductions (~75%) Oregon Interim <12 Load capacity issue months Local failures possible Concrete shear cracks continue to grow Serious traffic hazard 12 months Primary structural element condition rating <3 Primary structural element deteriorated and affecting load capacity of bridge General condition of bridge is poor Temporary repair of primary structural element is in poor condition Operating rating factor <1 for any of three permit truck configurations Routine-- Entire 6 months Signs of culvert failure exists; bottom Culvert buckling in CMP, etc. 12 months Culvert (62) condition 3 or 4. Any culvert element quantity in state 4 Pennsylvania Interim Component 24 months Between routine inspections, to provide (special)--I reduced interval for component Routine Entire 6 months Condition rating 3 or less for fracture-critical superstructure Routine Entire 12 months Condition rating 3 or less for superstructure, substructure, or culvert; not fracture-critical Condition rating 4 or less for fracture-critical superstructure Routine Entire 6 months Temporary bridge Bridge with temporary support 12 months Posted bridges Special Component <24 Examine known or expected deficiencies months Virginia Pin and Component 6 months Frozen pins/hangers, non-redundant hanger-- structures Ultrasonic 12 months Frozen pins/hangers, redundant structures testing Non-redundant structures. New or newly replaced pins Routine 12 months Restricted weight limit Component 12 months General condition rating <4 Wisconsin Interim Component 12 months Suspect details. Unscheduled inspection

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166 TABLE F14 FORTY-EIGHT-MONTH INTERVAL FOR ROUTINE INSPECTION DOT Inspection Interval Notes Connecticut Routine--Bridges 48 months In service four years Had in-depth inspection Condition ratings 6 or better HS 30 inventory Single span <100 ft span Less than 75 years old 14 ft vertical clearance ADT < 125,000 ADTT < 10% Eastern Federal Lands Bridges 48 months Main elements condition rating >5 Montana NBI/element level inspection 48 months Prestressed structures MDT design standards Length < 100 ft Known good condition Oregon Routine--Culvert 48 months Culvert (62) condition 6 or better Element state 100% 1 or 2 ADT = average daily traffic; ADTT = average daily truck traffic; MDT = Montana Department of Transportation. TABLE F15 SPECIAL INSPECTIONS DOT Name Notes Connecticut Deck surveys Damage mapping for deck. Visual inspection, hammer tapping, additional testing as necessary Joint measurements Measurement for monitoring Settlement Measurement for monitoring Interim A Pin and hanger or hinge measurements Interim B Shiplap measurements Interim C Tipping/settlement of substructure Interim D Lateral movement of beams and bearings Interim E Temporary bents and supports Interim F Crack growth Interim G Check for scour or undermining Delaware Storm inspection Live, remote monitoring of scour vulnerable bridges during high flow periods Live, remote monitoring of flow in selected waterways Eastern Concrete deck Component investigation Federal studies Lands Vertical clearance After new overlay or rehabilitation Florida Storm event--Level 1 Site visit to verify that approaches are intact with no obvious problem Storm event--Level 2 Measure channel profile Storm event--Level 3 In-depth inspection based on findings of Level 1 or 2 inspection Iowa Local surveillance To monitor specific elements; NBIS team leader preferred but not required Maryland Ultrasonic inspection of pins Michigan Scoping Selection for bridge program. Development of repair project. More precise evaluations such as deck sounding and beam thickness measurements after cleaning. Information is given to the previous bridge inspector to adjust their ratings. New York Special--Type 5 Address maintenance or inspection concerns unique to bridge. Results not entered in database. North Ultrasonic inspections Carolina Oregon Concrete corrosion survey Pennsylvania Interim (special) Limited to critical areas Special (problem Special areas as directed by management area)--P Tennessee Repair Verify repairs done to bridge NBIS = National Bridge Inspection Standards.

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167 TABLE F16 ROUTINE INSPECTION OF MINOR BRIDGES AND NON-BRIDGES DOT Inspection Interval Note Connecticut Sign structure 48 months Overhead sign support Florida Ferry slip Ferry slip Sign structure 24 months Overhead sign Tunnel Tunnel Iowa Pedestrian 48 months Pedestrian bridge--Inspect for hazards to highway below. bridge Inspect for high load hits. Inspection by NBIS team leader. Owner notified of conditions needing attention. Railroad 48 months Railroad bridge--Inspect for hazards to highway below. bridge Inspect for high-load hits. Inspection by NBIS team leader. Owner notified of conditions needing attention. Maryland Electrified Electrified railroad bridges railroad bridge Michigan Minor bridge State DOT inspects spans down to 10 ft. Local agencies are only required to inspect structures 20 ft and above. Pedestrian Pedestrian bridges. NBI procedures, but not reported to bridge FHWA Railroad Railroad bridge over public road. NBI procedures, but not bridge reported to FHWA Montana Minor bridge Spans down to 8 ft on national and state highway systems, or on transporter erector routes New Jersey Minor Inspected as funds allow culverts Noise wall Noise reduction walls Railroad Open deck railroad bridges. Inspect condition of ties as bridge hazard to road below New York Sign structure Overhead sign structure; rating scale similar to bridges Oregon Adjacent All structures, over or adjacent to public roads, that in failure structure would cause immediate danger to traveling public Minor bridge Minor structures; spans down to 6 ft Tunnel Tunnels Pennsylvania Conveyor belt Conveyor belts High-mast High-mast lighting light Highway 24 months Non-bridge over highway. Inspection limited to highway environs--H environs Minor 24 months Bridge spans 8 to 20 ft bridge--R Minor 24 months Routine and underwater inspection. Bridge spans 8 ft to 20 ft bridge--W Miscellaneous 24 months Other miscellaneous structure; NBIS style --M Noise walls-- 24 months Noise walls; NBIS style M Overhead 24 months Overhead, non-highway bridge. Inspection usually structure--O performed by owner. Pipe truss Pipe trusses Retaining 24 months Retaining walls; NBIS style Wall--M Sign 24 months Sign structure; NBIS-like inspection structure--S Utility structures Tennessee Minor bridge Minor structures with spans of 4 ft or more and fill/cover less than 16 ft Virginia Minor culvert 48 months Any minor structure not identified as culvert Minor culvert 48 months Minor culvert with opening greater than 36 square feet Overhead 24 months Overhead structures. Vertical and lateral clearances structure (continued )

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168 TABLE F16 (Continued) ROUTINE INSPECTION OF MINOR BRIDGES AND NON-BRIDGES DOT Inspection Interval Note Washington Ferry terminal 12 months Ferry terminal--Vehicle transfer spans Ferry terminal--Other structures/areas 24 months Ferry terminal--Vehicle transfer spans. In-depth inspection Ferry terminal--Other structures/areas. In-depth inspection Ferry terminal 12 months Ferry terminal equipment. Electrical systems, mechanical equipment systems, hoists Ferry terminal 12 months Soundings at vehicle transfer spans of ferry terminals soundings Highway lid 60 months Minor bridge 72 months Bridge span < 20 ft, on STRAHNET highway Bridge span < 20 ft, operating rating less than HS 10 Bridge span < 20 ft, vertical clearance < 18 ft Single steel or concrete spans 6 ft to 20 ft Steel corrugated pipes, spans 8 ft to 20 ft Timber spans 4 ft to 20 ft Multiple pipe 72 months Multiple pipes out to 10 ft to 20 ft Multiple span 72 months Multiple spans 8 ft to 20 ft Overhead Safety inspection of structures crossing state-owned structures facilities Pedestrian 60 months Pedestrian bridge bridge Private bridge 60 months Private bridges over public highways Sign structure Sign bridges Tunnel 24 months Tunnels NBIS = National Bridge Inspection Standards; STRAHNET = Strategic Highway Network. TABLE F17 U.S. INFORMAL INSPECTIONS Stored in Maintenance State Public Bridge File Stored in DOT Source Police Source Source (paper) BMS/Database Alaska Yes Yes If significant Arizona No Arkansas No California Yes Yes Delaware Yes Yes Idaho No Iowa Yes No Kentucky Yes Maine Yes Inspection report Maryland Yes Yes Yes Michigan Yes Missouri Yes No Nevada Yes New Mexico No New York No North Carolina Yes No (Annual ride by) North Dakota Yes Ohio Yes No Oregon Yes Yes Inspection report Pennsylvania Yes Rhode Island Yes No South Dakota Yes No Texas Yes No Utah No Vermont Yes No Virginia No Washington Yes Yes Inspection report West Virginia Yes

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169 TABLE F18 BRIDGE MONITORING DOT Method Notes Alabama Visual monitor Of known defect, by maintenance crew Alaska Measurement Vertical or horizontal survey Arizona Visual monitor Of known defect, by maintenance crew Measurement Movement Arkansas Measurement Deflection, differential movement California Visual monitor Real-time monitor during high water Measurement Crack gages, deck grades, EDM, Stringline Instrumentation Remote scour monitoring for scour-critical bridges Delaware Measurement Deflection, elevations, movement, settlement Eastern Federal Lands Visual monitor Idaho Measurement Crack length, crack progress Iowa Visual monitor By district personnel; might not be team leader Measurement Crack opening, movement Kentucky Visual monitor For scour Measurement Crack gage Maine Measurement Crack growth, element rotation Instrumentation Acoustic emission Maryland Measurement Crack opening, deflection, movement Instrumentation Missouri Visual monitor For scour Measurement Crack opening, deflection, movement Montana Visual monitor Nevada Instrumentation As appropriate until repaired New Jersey Visual monitor Tracking defect without interim inspection Instrumentation For scour displacement probes, sonar probes New Mexico Measurement Crack opening, deflection New York Measurement Crack growth North Carolina Visual monitor North Dakota Visual monitor For progress of defect Measurement Crack growth, movement Ohio Measurement Crack monitor Oklahoma Measurement Movement Oregon Measurement Crack growth Instrumentation Acoustic emission, strain gages Pennsylvania Visual monitor For scour, after high water by maintenance crew or county manager Measurement Movement Instrumentation Inclinometers, strain gages, other detectors South Dakota Visual monitor For known defect Tennessee Visual monitor For known defect Texas Instrumentation Acoustic emission Measurement Crack growth Utah Measurement Crack opening Instrumentation Ultrasound, electrochemical crack detection Vermont Visual monitor For scour after high water, for crack growth, for movement Virginia Visual monitor For known defect Washington Visual monitor For known defect Measurement Movement, settlement, streambed profile West Virginia Visual monitor For known defect Measurement Crack opening, deflection, movement Instrumentation Acoustic emission, strain gages, EDM = electronic distance meter.