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Every bridge in Boise County, Idaho

89 inventoried bridges, busiest first

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled

BridgeBuiltVehicles/dayCondition
SH 55 over McLEOD WAY202410,500Good
SH 55 over Payette River20218,800Good
SH 55 over Power Canal19948,800Good
SH 55 over Payette River19717,800Fair
SH 55 over Uprr;horseshoe Bend Op19717,800Fair
SH 55 over S.fk.payette River19557,300Fair
SH 55 over N.fk.payette River19844,700Fair
SH 21 over Wildlife Crossing20103,500Good
SH 21 over Mores CR; Dunnigan CR20082,900Good
SH 21 over Mores Cr.;grimes Cr.road19582,900Fair
SH 21 over Mores Cr.;spencers Cabin19952,900Good
Sma 3824;BNKS Lwmn over M.fk.payette R;crouch Br20132,300Good
SH 21 over Elk Creek20002,000Good
SH 21 over Mores Cr.;at Minniha CR19902,000Fair
SH 21 over Mores Cr.;stierman Gulch19902,000Good
SH 21 over Mores Cr.;wildcat Gulch19902,000Good
SH 21 over Mores Cr;mckinley Gulch19902,000Good
SH 21 over Mores Cr;n.y. Gulch #120022,000Fair
SH 21 over Mores Cr;n.y. Gulch #220022,000Fair
SH 21 over Mores Cr;thorn Creek20012,000Good
SH 21 over Mores Creek;big Gulch19902,000Good
SH 21 over Chapman Creek19881,200Good
SH 21 over Clear Creek;at Lowman19391,200Fair
SH 21 over Five Mile Creek20111,200Fair
SH 21 over S.fk.payette River19701,200Fair
SH 21 over S.fk.payette River19701,200Good
SH 21 over Warm Springs Creek19561,200Fair
Sma 3824;BANKS Low over Rock Cliff Gini Half Brd1991690Fair
Sma 3824;BNKS Lwmn over Deadwood River1985690Good
SH 21 over Canyon Creek1964620Good
SH 21 over Canyon Creek1964620Good
SH 21 over Canyon Creek1964620Good
Old Crouch Road over M Fk Payette R;crouch Br2016550Good
Stc 3826;ALDER Crk over S.fk.payette River2014460Good
SH 21 over S.fk.payette R;lowman Br1948410Fair
Banks Grade over N. Fk. Payette River1957350Good
Brownlee Road over Payette River;gardena Br1920350Fair
STC3883;CLEAR Crk over Grimes Creek1930310Fair
Stc 3883;ROBIE Crk over Mores Creek1997310Fair
STC3832;PORTER Crk over Porter Creek1988300Fair
Pioneer Road over Shafer Creek1988290Good
Stc 3825 Cntrville over Elk Creek1993270Fair
Edna Ck.-l.owl Rd. over Crooked River1976150Good
Long Gulch Road over M.fk.boise River1954130Fair
Anderson Creek Rd over Anderson Creek1983100Poor
Dagget Creek Rd over Mores Creek1991100Fair
Grand Jean Road over Canyon Creek197280Good
N.fk. Boise R. Rd. over Mores Creek195579Good
Boise Street over Power Canal199560Good
Campgrd. Access over South Fork Payette River196660Fair
N.fk. Boise R. Rd. over North Fork Boise River194959Fair
Boulder Creek Road over Mores Creek198250Poor
Bunch Drive over M. Fk. Payette River199550Fair
Edna Ck.-l.owl Rd. over Pikes Fork Creek200550Good
Lightening CR Rd over M. Fk. Payette196450Fair
Nfsr 347 over Grayback Gulch201850Good
No Data Entered over Scriver Creek202250Good
Summit Flat Road over Clear Creek197450Fair
Summit Flat Road over Smith Creek197450Fair
Archie Ck. Road over South Fork Payette River196240Fair
N.fk. Boise R. Rd. over Crooked River195740Good
Willis Flat Road over So.fk.payette River195935Fair
Cottonwd-bannock over Mores Creek196230Poor
Park Ck. C.g. Rd. over Clear Creek195725Good
Pine Creek Road over Grimes Creek194725Fair
Rough Creek Road over Mores Creek197925Good
Smith Creek Road over M.fk.payette R;r.smith C197325Fair
Wapiti Road over South Fork Payette River197625Good
Avelene Ck. Road over Grimes Creek195420Poor
Grimes Creek Road over Grimes Creek193520Fair
Grimes Creek Road over Grimes Creek196020Fair
Grimes Pass Road over Grimes Creek199620Good
Long Creek Road over Clear Creek198020Good
Shafer Creek Road over Shafer Creek191420Poor
Shafer Creek Road over Shafer Creek199720Fair
Deadwd.-sct.mt.rd. over East Big Pine Creek200715Good
Private Road over Mores Creek198515Good
W. Willow-big Owl over Crooked River197115Good
Hunter Ck-crkd. R. over Bear Creek196312Fair
Hunter Ck-crkd. R. over Bear River196512Good
Hunter Ck-crkd. R. over Crooked River196312Fair
Lt. Anderson Ck Rd over Anderson Creek198312Good
Summit Flat Road over Grimes Creek198212Good
Five Mile Road over Five Mile Creek198110Fair
Okeefe Creek Road over Clear Creek196610Good
Okeefe Creek Road over Clear Creek196610Fair
Spur 348J over Pikes Fork Creek198510Fair
Trapper Ck. Road over North Fork Boise River197710Good
Willow Ck.-crkd.r. over Crooked River19705Good

Source: FHWA National Bridge Inventory, 2025.

Boise County bridge conditions · Idaho bridges by county.

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