Longest Bridges in New Hampshire

The longest bridge in New Hampshire is the US 1 Bypass over Piscataqua River Rr, at 0.5 miles (2,784 ft) of total structure length. The table below ranks the longest bridges in New Hampshire by structure length.

Drawn to scale

The 10 longest crossings in New Hampshire, one scale
500 FT
1US 1 Bypass over Piscataqua River RrNH · 2,784 ft2Nh119 over Connecticut River NecrrNH · 1,906 ft3I-95 over Preble Way CsxNH · 1,810 ft4US 4 Nh 16 Tpk SB over Little Bay RDNH · 1,649 ft5US 4 Nh 16 Tpk NB over Little Bay RDNH · 1,598 ft6Bridge Street WB over I-293 Nh 3a Csx Merr RNH · 1,540 ft · ×27Rocknham Mall Entr over Rockham BLVD Bk ParknlotNH · 1,456 ft8I-95 over Piscataqua RiverNH · 1,344 ft9Wieczorek DR over Merrimack R Nh 3a CsxNH · 1,220 ft10Nh 1a over Hampton RiverNH · 1,199 ft
For scale: a football field, end zones included360 ft

Every bar is drawn to the same scale, colored by the bridge's overall condition (green good, orange fair, red poor). Tick marks are piers where they are far enough apart to see. Twin structures carrying the two directions of one road are shown once, marked ×2.

BridgeCountyLengthYear BuiltDaily Traffic
US 1 Bypass over Piscataqua River RrRockingham2,784 ft (0.5 mi)201711,064
Nh119 over Connecticut River NecrrCheshire1,905 ft (0.4 mi)20248,409
I-95 over Preble Way CsxRockingham1,810 ft (0.3 mi)197174,766
US 4 Nh 16 Tpk SB over Little Bay RDStrafford1,648 ft (0.3 mi)201833,938
US 4 Nh 16 Tpk NB over Little Bay RDStrafford1,598 ft (0.3 mi)196634,298
Bridge Street WB over I-293 Nh 3a Csx Merr RHillsborough1,540 ft (0.3 mi)19908,778
Bridge Street EB over I-293 Nh 3a Csx Merr RHillsborough1,540 ft (0.3 mi)19888,778
Rocknham Mall Entr over Rockham BLVD Bk ParknlotRockingham1,456 ft (0.3 mi)19914,631
I-95 over Piscataqua RiverRockingham1,344 ft (0.3 mi)197174,766
Wieczorek DR over Merrimack R Nh 3a CsxHillsborough1,220 ft (0.2 mi)201157,651
Nh 1a over Hampton RiverRockingham1,199 ft (0.2 mi)19499,402
US 3 Nh 3a over I-293 Nh 3a Csx Merr RHillsborough1,186 ft (0.2 mi)192322,640
US 4 over Bellamy RiverStrafford1,138 ft (0.2 mi)199819,707
I-93 SB over Stevens PondHillsborough1,126 ft (0.2 mi)197748,294
Salmon Street EB over Merrimack R Csx RD RampHillsborough1,022 ft (0.2 mi)197013,150
I-93 NB over Stevens PondHillsborough1,009 ft (0.2 mi)197736,942
I-293 SB Nh101 EB over Merrimack River CsxHillsborough922 ft (0.2 mi)196041,914
I-293 NB Nh101 WB over Merrimack River CsxHillsborough922 ft (0.2 mi)196044,010
Kelley Street over Piscataquog R Csx RDHillsborough908 ft (0.2 mi)197311,356
US 1 over Piscataqua RiverRockingham902 ft (0.2 mi)19219,471
Nh101 EB over Squamscott RiverRockingham879 ft (0.2 mi)199824,304
Nh101 WB over Squamscott RiverRockingham879 ft (0.2 mi)199423,913
Salmon Street WB over Merrimack River Csx RDHillsborough857 ft (0.2 mi)197017,799
I-89 NB over Connecticut River NecrrGrafton847 ft (0.2 mi)196622,288
I-89 SB over Connecticut River NecrrGrafton846 ft (0.2 mi)196621,268
Ramp H over Fee TpkHillsborough828 ft (0.2 mi)19939,004
I-93 NB over Merrimack River Csx RDHillsborough826 ft (0.2 mi)197648,395
I-93 SB over Merrimack River Csx RDHillsborough826 ft (0.2 mi)197634,000
US 3 Nh 25 over Pemigewasset River NhrrGrafton799 ft (0.2 mi)19372,666
Circumferential WB over Merrimack River CsxHillsborough771 ft (0.1 mi)197350,841
Circumferential EB over Merrimack River CsxHillsborough741 ft (0.1 mi)200043,572
US 3 over Merrimack RiverMerrimack696 ft (0.1 mi)199826,707
Nh 12 Nh103 over Connecticut RiverSullivan678 ft (0.1 mi)19699,277
Main Street over Merrimack River Csx RDMerrimack674 ft (0.1 mi)197615,760
I-93 SB over Connecticut RiverGrafton671 ft (0.1 mi)19813,544
I-93 NB over Connecticut RiverGrafton671 ft (0.1 mi)19763,621
Church Street over Connecticut River NecrrCheshire634 ft (0.1 mi)19839,354
I-93 SB over Stevens PondHillsborough628 ft (0.1 mi)197628,328
Nh111 WB over Merrimack RiverHillsborough602 ft (0.1 mi)197017,275
Nh111 EB over Merrimack RiverHillsborough602 ft (0.1 mi)197315,615
Nh111 over Harris RD Flatrock BkRockingham601 ft (0.1 mi)200717,014
US 4 over Merrimack RiverMerrimack592 ft (0.1 mi)200515,071
Bridge Hill Road over Connecticut RiverCoos590 ft (0.1 mi)1997870
I-93 SB over US 3 Pemigewasset RiverGrafton579 ft (0.1 mi)196910,052
I-93 NB over US 3 Pemigewasset RiverGrafton557 ft (0.1 mi)196910,012
Nh 1b over Piscataqua EstuaryRockingham543 ft (0.1 mi)19553,041
Nh 49 over Mad RiverGrafton540 ft (0.1 mi)19792,828
Nh 18 over Connecticut RiverGrafton533 ft (0.1 mi)19341,508
Nh 25 over Ossipee RiverCarroll524 ft (0.1 mi)20042,854
I-393 US 4 Us202 over Merrimack RiverMerrimack524 ft (0.1 mi)197840,527
Nh 9(loudon Road) over Merrimack RiverMerrimack524 ft (0.1 mi)196623,721
I-93 US 4 SB over Merrimack RiverMerrimack523 ft (0.1 mi)195925,801
I-93 US 4 NB over Merrimack RiverMerrimack523 ft (0.1 mi)195925,855
Nh 11 over Connecticut RiverSullivan500 ft (0.1 mi)19006,519
Newbury Road over Connecticut RiverGrafton493 ft (0.1 mi)19702,136
Meadow Road over Androscoggin RiverCoos490 ft (0.1 mi)1984157
Gulf Road over Salmon Falls RiverStrafford488 ft (0.1 mi)19506,132
Nh 1b over Piscataqua EstuaryRockingham483 ft (0.1 mi)19553,041
US 3 Nh 11 over Winnisquam LakeBelknap474 ft (0.1 mi)197316,322
East Thetford Road over Connecticut RiverGrafton471 ft (0.1 mi)19372,160
I-93 NB over Nh101 WB Sbe RampHillsborough471 ft (0.1 mi)197725,082
Granite Street over Merrimack RiverHillsborough471 ft (0.1 mi)198121,111
Nh135 over Ammonoosuc RiverGrafton470 ft (0.1 mi)19981,409
Nh123 over Connecticut RiverCheshire467 ft (0.1 mi)19108,425
Nh 10a Wheelock ST over Connecticut RiverGrafton465 ft (0.1 mi)199812,683
Nh 77 over Canal 2 Choate BkHillsborough453 ft (0.1 mi)19604,701
US 4 over Connecticut RiverGrafton451 ft (0.1 mi)201511,594
Cornish Toll Br RD over Connecticut RiverSullivan449 ft (0.1 mi)18662,722
Nh 9 over Connecticut RiverCheshire446 ft (0.1 mi)200311,517
US 4 over Rec Trail Mascoma RiverGrafton443 ft (0.1 mi)201510,801
US 3 over Suncook River Buck STMerrimack439 ft (0.1 mi)20079,285
Wieczorek DR over Little Cohas BrookRockingham439 ft (0.1 mi)20118,168
Ramp E(camp St) over CsxHillsborough436 ft (0.1 mi)19703,341
Nh 25a over Connecticut RiverGrafton433 ft (0.1 mi)19373,625
Cross Street over I-93Rockingham433 ft (0.1 mi)20076,905
Nh 16trk Unity ST over Androscoggin RiverCoos432 ft (0.1 mi)19824,023
I-93 SB over Pemigewasset RiverGrafton424 ft (0.1 mi)196411,571
I-93 NB over Pemigewasset RiverGrafton424 ft (0.1 mi)196411,461
Nh 1a over Sagamore CreekRockingham423 ft (0.1 mi)20156,704
Vt105 Bridge ST over Connecticut RiverCoos419 ft (0.1 mi)19471,124
Us302 over Saco RiverCarroll418 ft (0.1 mi)197213,313
Nh 16 Nh 25 over Bearcamp RiverCarroll418 ft (0.1 mi)202111,700
Cross Road over Pemigewasset RiverGrafton416 ft (0.1 mi)1973775
Nh108 over Squamscott RiverRockingham416 ft (0.1 mi)200113,846
Nh104 over Pemigewasset RiverGrafton411 ft (0.1 mi)19879,297
Nh 9 over Beards Brook Beards RDHillsborough411 ft (0.1 mi)20027,409
Broad ST Parkway over Nashua RiverHillsborough411 ft (0.1 mi)20161,100
I-393 US 4 Us202e over Soucook RiverMerrimack411 ft (0.1 mi)19888,857
I-93 SB over Nh111Rockingham409 ft (0.1 mi)201442,082
I-93 SB over Pemigewasset RiverGrafton409 ft (0.1 mi)19697,613
I-93 NB over Pemigewasset RiverGrafton409 ft (0.1 mi)19697,498
Nh 16 over Saco RiverCarroll408 ft (0.1 mi)194512,188
US 2 over Connecticut RiverCoos408 ft (0.1 mi)20203,840
I-93 SB over Pemigewasset RiverGrafton408 ft (0.1 mi)19707,166
I-93 NB over Pemigewasset RiverGrafton408 ft (0.1 mi)19707,017
Sewalls Falls Road over Merrimack RiverMerrimack407 ft (0.1 mi)20163,708
US 3 Nh 11 Nh127 over Pemigewasset RiverMerrimack405 ft (0.1 mi)199412,379
Us302 Nh 10 over Ammonoosuc RiverGrafton400 ft (0.1 mi)19833,265
Nh 25 over Bearcamp RiverCarroll396 ft (0.1 mi)20054,213
I-393 US 4 Us202w over Soucook RiverMerrimack395 ft (0.1 mi)19888,164
Barnet Road over Connecticut RiverGrafton389 ft (0.1 mi)1937992
I-93 NB over Nh111Rockingham387 ft (0.1 mi)201141,528
US 4 Nh 10 over Mascoma River CsxGrafton382 ft (0.1 mi)194513,685
Nh121 over Little River CsxRockingham381 ft (0.1 mi)200610,799
West Bath Road over Ammonoosuc R Nhrr(abd)Grafton375 ft (0.1 mi)183296
Nh175a over Pemigewasset RiverGrafton365 ft (0.1 mi)20067,661
I-93 NB over E Br Pemigewasset RiverGrafton365 ft (0.1 mi)19727,160
Nh106 Main ST over Winnipesaukee RiverBelknap361 ft (0.1 mi)197018,507
Us302 Nh 10 over Nhrr(abd)Grafton359 ft (0.1 mi)19904,216
Nh 25 over Connecticut RiverGrafton354 ft (0.1 mi)19292,403
Nh151 over I-95Rockingham351 ft (0.1 mi)19753,412
Main Street over Mascoma LakeGrafton345 ft (0.1 mi)20121,358
Nh101 WB over I-95Rockingham342 ft (0.1 mi)20009,431
I-93 SB over Nhrr Winnipesaukee RiverMerrimack341 ft (0.1 mi)196015,417
Howe Hill Road over I-89Sullivan341 ft (0.1 mi)196795
Nh101 EB over I-95Rockingham341 ft (0.1 mi)19999,431
Nh101 over Nh101a CsxHillsborough339 ft (0.1 mi)197115,196
Nh119 over Connecticut RiverCheshire338 ft (0.1 mi)19208,535
Nh102 over I-93Rockingham338 ft (0.1 mi)201834,331
US 3 Fee Tpk SB over Nashua RiverHillsborough337 ft (0.1 mi)195971,221
US 3 Fee Tpk NB over Nashua RiverHillsborough337 ft (0.1 mi)195573,979
I-93 SB over Skookumchuck BrookGrafton335 ft (0.1 mi)19875,092
I-93 NB over Skookumchuck BrookGrafton335 ft (0.1 mi)19875,128
Western AVE over Contoocook RiverMerrimack335 ft (0.1 mi)2017551
I-93 NB over Nhrr Winnipesaukee RiverMerrimack333 ft (0.1 mi)196015,544
Grandview Road over I-93 Fee TpkMerrimack331 ft (0.1 mi)19781,142
Nh132 over I-93Merrimack331 ft (0.1 mi)19591,052
North Road over Nh101Rockingham330 ft (0.1 mi)19923,113
I-93 SB over I-293 Fee TpkMerrimack326 ft (0.1 mi)197721,233
Industrial Park RD over Ammonoosuc RiverGrafton321 ft (0.1 mi)19952,234
Nh175 over Pemigewasset RiverGrafton319 ft (0.1 mi)1976682
Us202 Nh 9 over Elm BrookMerrimack314 ft (0.1 mi)196117,117
Guildhall Road over Connecticut RiverCoos314 ft (0.1 mi)1984815
Us202 Nh 9 over Contoocook RiverMerrimack313 ft (0.1 mi)196117,117
Ash Street over I-93Rockingham313 ft (0.1 mi)20197,299
Brookdale Road over I-93Rockingham312 ft (0.1 mi)20121,124
Nh 16 Sp Tpk over Lyman BrookStrafford312 ft (0.1 mi)198016,645
Bible Hill Road over Nh 9 Ramp AHillsborough311 ft (0.1 mi)200096
Mcindoes Street over Connecticut RiverGrafton308 ft (0.1 mi)1930444
I-89 SB over Mascoma R Riverside DRGrafton307 ft (0.1 mi)196616,677
Nh 28a over I-93Hillsborough307 ft (0.1 mi)19766,695
I-89 Nh 10 NB over Riverside DR Mascoma RivGrafton306 ft (0.1 mi)196616,261
Nh 16trk 12th ST over Androscoggin RiverCoos304 ft (0.1 mi)19752,827
Us302 Nh 10 over Ammonoosuc RiverGrafton304 ft (0.1 mi)19804,777
Nh 9 over I-393 US 4 Us202Merrimack301 ft (0.1 mi)19888,465
Pinnacle Hill Road over I-93Belknap299 ft (0.1 mi)1963129
Huse Road over I-293 Nh101Hillsborough299 ft (0.1 mi)19607,350
Walker Street over Piscataqua R Back ChanRockingham299 ft (0.1 mi)19137,000
Nh 16 Sp Tpk SB over Nh108 Csx(abd)Strafford299 ft (0.1 mi)195721,323
Nh119 over Connecticut RiverCheshire296 ft (0.1 mi)19208,535
Nh111 over I-95Rockingham295 ft (0.1 mi)19757,327
I-93 Parkway over Bike Path Lafayette BkGrafton294 ft (0.1 mi)198710,220
Nh132(eastside Dr) over I-393 US 4 Us202Merrimack294 ft (0.1 mi)19789,347
Loon Mountain Road over E Br Pemigewasset RiverGrafton294 ft (0.1 mi)20161,555
Nh 27 over I-95Rockingham293 ft (0.1 mi)197610,248
Nh 9 over Old Nh 9 Granite Lk OutCheshire289 ft (0.1 mi)19946,118
Walnut AVE over I-95Rockingham289 ft (0.1 mi)1975995
Us302 Nh 18 Nh116 over I-93Grafton288 ft (0.1 mi)19593,454
Blair Road over Pemigewasset RiverGrafton288 ft (0.1 mi)18691,584
North Ashland Road over I-93Grafton287 ft (0.1 mi)1963728
Nh 33 over I-95Rockingham285 ft (0.1 mi)197118,255
I-93 SB over E Br Pemigewasset RiverGrafton283 ft (0.1 mi)19727,285
Nh111 over US 3 Fee TpkHillsborough283 ft (0.1 mi)199834,337
I-93 SB over Ammonoosuc RiverGrafton282 ft (0.1 mi)19604,499
I-93 NB over Ammonoosuc RiverGrafton282 ft (0.1 mi)19604,235
I-93 SB On Ramp over I-93Grafton280 ft (0.1 mi)19592,646
Pierces Island RD over Little HarborRockingham280 ft (0.1 mi)19581,272
Nh 12a over Sugar RiverSullivan280 ft (0.1 mi)19671,067
Nh135 over I-93Grafton279 ft (0.1 mi)19814,909
Nh175 over Pemigewasset RiverGrafton279 ft (0.1 mi)1976682
Nh127 over Spillway ChannelMerrimack275 ft (0.1 mi)19613,434
I-95(RAMP B-d) over I-95Rockingham275 ft (0.1 mi)197619,641
Bridge Street over Androscoggin RiverCoos273 ft (0.1 mi)1969985
Green Road over Nh101Rockingham273 ft (0.1 mi)1982528
Pine Street over I-93 Fee TpkMerrimack272 ft (0.1 mi)19782,263
Jewett Road over I-89Merrimack271 ft (0.1 mi)19591,716
Ocean Road over I-95Rockingham270 ft (0.1 mi)19728,244
Us302 over Connecticut RiverGrafton270 ft (0.1 mi)19287,367
I-293 EB Nh101 EB over Fee TpkHillsborough270 ft (0.1 mi)199333,533
Horse Hill Road over Contoocook RiverMerrimack270 ft (0.1 mi)19812,615
Hilltop Road over I-93Grafton269 ft (0.1 mi)1985354
Tremont Street over Contoocook RiverMerrimack269 ft (0.1 mi)19556,767
Sp Tpk SB On Ramp over Cocheco RiverStrafford269 ft (0.1 mi)20092,280
I-93 Ramp over Fee TpkMerrimack268 ft (0.1 mi)1976761
Nh 16 Sp Tpk SB over Cocheco RiverStrafford267 ft (0.1 mi)195723,607
Nh 16 Sp Tpk NB over Cocheco RiverStrafford267 ft (0.1 mi)195722,560
Mt Orne Road over Connecticut RiverCoos266 ft (0.1 mi)1911642
Woodbury Avenue over Sp Tpk US 4 Nh 16Rockingham265 ft (0.1 mi)20158,800
Depot Road over Ashuelot RiverCheshire265 ft (0.1 mi)1978317
River Road over I-93Hillsborough265 ft (0.1 mi)19756,128
Towle Farm Road over I-95Rockingham264 ft (0.1 mi)19742,242
I-93 Fee Tpk SB over I-89 Turkey River PedMerrimack263 ft (0.0 mi)201435,573
I-93 Fee Tpk NB over I-89 Turkey RiverMerrimack263 ft (0.0 mi)201434,805
South Road over I-95Rockingham263 ft (0.0 mi)19751,808
Nh127 over I-89Merrimack262 ft (0.0 mi)19943,866
Nh101 Ramp A-b over Nh101Rockingham259 ft (0.0 mi)19816,073
Nh 25 Nh 3a over Baker RiverGrafton258 ft (0.0 mi)196813,729
West Portsmouth ST over I-93 US 4Merrimack258 ft (0.0 mi)20004,541
Nh 88 over I-95Rockingham257 ft (0.0 mi)19753,566
US 3 Nh 11 Nh132 over I-93Belknap256 ft (0.0 mi)200023,105