Scour-Critical Bridges in Utah

Utah has 88 bridges rated scour-critical by the Federal Highway Administration. These bridges have foundations that are unstable or at risk of undermining during flood events. Scour-critical doesn't mean a bridge is about to collapse — it means extra monitoring and countermeasures are in place — but these structures are priorities for repair or replacement.

How this ranking works

This state list filters to NBI scour ratings 0 through 3, then sorts by average daily traffic. It is intended to show flood-vulnerability exposure, not to label any bridge as currently unsafe.

BridgeCountyScour RatingDaily TrafficCondition
7800 South Street over Jordan RiverSalt Lake3 — Serious34,656Fair
Highland Drive over Big Cottonwood CreekSalt Lake3 — Serious20,009Poor
800 South Street over Provo RiverUtah3 — Serious14,608Fair
City Street over Virgin RiverWashington3 — Serious13,973Fair
4800 South Street over Jordan RiverSalt Lake3 — Serious10,981Fair
County Road over Santa Clara RiverWashington3 — Serious6,533Fair
County Road over North Fork Ogden RiverWeber3 — Serious5,200Fair
Logan City Street over Logan RiverCache2 — Critical4,505Poor
County Road over Echo CreekSummit3 — Serious3,938Fair
Morgan County Road over East Canyon CreekMorgan3 — Serious3,743Fair
Us-191 (sr-191) over Willow CreekCarbon3 — Serious3,058Fair
County Road over Weber RiverSummit3 — Serious2,848Fair
Us-191 (sr-191) over Willow CreekCarbon3 — Serious2,375Fair
Logan City Street over Logan RiverCache3 — Serious2,000Fair
County Road over Cottonwood CreekMorgan3 — Serious1,582Fair
400 West Street over Hobble CreekUtah3 — Serious1,512Good
North Main Street over Spring Canyon WashCarbon3 — Serious1,386Fair
8660 South Street over Utah And Salt Lake CanalSalt Lake3 — Serious1,323Fair
County Road over Weber RiverMorgan3 — Serious1,298Fair
County Road over North Fork Ogden RiverWeber3 — Serious1,260Fair
County Road over Deep CreekMorgan3 — Serious1,034Fair
Highland Circle over Big Cottonwood CreekSalt Lake3 — Serious1,021Fair
12950 South Street over Jordan And Salt Lake CSalt Lake3 — Serious1,008Fair
200 South Street over Hobble CreekUtah3 — Serious945Fair
County Road over Smith And Morehouse CRSummit2 — Critical914Poor
County Road over Dry Fork Of Weber RiverSummit3 — Serious844Fair
2500 West St. -co. over Ashley CreekUintah3 — Serious780Fair
County Road over So.br.so.fk. Ogden RiverWeber3 — Serious756Good
300 East Street over Box Elder CreekBox Elder3 — Serious693Fair
Weber County Road over No.br.so.fk. Ogden RiverWeber3 — Serious662Fair
County Road over Middle Fork Ogden RiverWeber3 — Serious655Fair
2000 North St.-co. over Steinaker CanalUintah3 — Serious643Fair
Sr-31 over Huntington CreekEmery3 — Serious584Fair
County Road over Newton CreekCache3 — Serious504Fair
Hurricane City Rd. over Leeds CreekWashington3 — Serious504Fair
Exchange Road over Weber RiverWeber3 — Serious504Poor
Sr-29 over Grimes WashEmery3 — Serious400Fair
1500 N. County Rd. over Wilson CanalMillard3 — Serious350Fair
County Road over Guymon WashEmery3 — Serious300Fair
County Road over Miller CreekCarbon3 — Serious252Fair
County Road over Weber RiverSummit3 — Serious252Poor
County Road over Ashley CreekUintah3 — Serious252Fair
Bennie Creek Road over Thistle CreekUtah2 — Critical252Poor
County Road over Weber-provo Div. CanalSummit2 — Critical233Poor
County Road over North Fork Virgin RiverKane3 — Serious215Fair
County Road over Huntington CreekEmery3 — Serious214Fair
County Road over Yellowstone CreekDuchesne3 — Serious202Fair
Beaver Sld.rd. Co. over Lake Fork Overflow Chan.Duchesne3 — Serious189Fair
County Road over Lake Fork CreekDuchesne3 — Serious189Fair
Kolob Road over North CreekWashington3 — Serious151Fair
County Road over Malad RiverBox Elder2 — Critical139Poor
County Road over Wayne WashGrand3 — Serious139Fair
County Road over Fremont RiverSevier3 — Serious139Good
County Road over Seven Mile CreekSevier3 — Serious139Fair
County Road over Kenilworth WashCarbon3 — Serious126Fair
County Road over Sand WashEmery3 — Serious126Fair
Arena Access Road over Panguitch CreekGarfield3 — Serious126Fair
Center Street over Nash CreekWashington3 — Serious126Fair
County Road over Fremont RiverWayne3 — Serious113Fair
Co. Rd. To Notom over Pleasant CreekWayne3 — Serious113Fair
Co. Rd. 25800 No. over Malad RiverBox Elder3 — Serious110Poor
Paunsauguant Drive over Sevier RiverGarfield3 — Serious100Fair
Co.rd. F# 2600 over Smith-moorehouse Ck.Summit3 — Serious100Poor
County Road over San Pitch RiverSanpete3 — Serious81Fair
Town Street over Alvey WashGarfield3 — Serious76Good
County Road over San Pitch RiverSanpete3 — Serious75Fair
County Road over Duchesne RiverDuchesne3 — Serious69Fair
County Road over Red CreekDuchesne3 — Serious69Fair
County Road over Sevier RiverGarfield3 — Serious69Fair
County Road over San Pitch RiverSanpete3 — Serious68Fair
County RD (100 E) over Beaver RiverBeaver3 — Serious63Poor
County Road over Duchesne RiverDuchesne3 — Serious63Poor
Boys Ranch RD over Lake Fork Overflow Chan.Duchesne2 — Critical63Poor
County Road over Red CreekDuchesne3 — Serious63Fair
County Road over Buck Horn Draw WashEmery3 — Serious63Fair
Co.rd. Neilson AVE over Big Cottonwood CreekSalt Lake3 — Serious63Fair
Wasatch County Rd. over Currant CreekWasatch3 — Serious63Fair
Paint Shop RD over Coal CreekIron3 — Serious50Fair
County Road over San Pitch RiverSanpete3 — Serious50Fair
Town Road over Bryce CreekGarfield3 — Serious32Good
County Road over Henrieville CreekGarfield3 — Serious32Poor
County Road over Willow CreekUintah3 — Serious26Fair
County Road over Antimony CanalGarfield3 — Serious25Fair
County Road over Price RiverCarbon3 — Serious19Poor
County Road over Horse Canyon WashGarfield3 — Serious19Fair
County Road over Saleratus WashGrand3 — Serious13Fair
County Road over Kanab CreekKane3 — Serious13Fair
County Road over Mammoth CreekGarfield3 — Serious6Poor