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Every bridge in Oglala Lakota County, South Dakota

Name: Every bridge in Oglala Lakota County, South Dakota
Creator: Bridge Report Card
License: https://creativecommons.org/publicdomain/zero/1.0/

35 inventoried bridges, busiest first

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Oglala Lakota County, South Dakota, has 35 bridges in the 2025 National Bridge Inventory: 20 rated good, 13 fair, and 2 poor (as of August 20, 2026).
This index lists every one of them, busiest first; each links to its own condition record.

Bridge	Built	Vehicles/day	Condition
Irr Bia Rte 36 over White Clay Creek	2001	7,551	Good
Irr US018 over Wolf Ck	2006	5,154	Fair
Irr US018 over Ck	2016	3,597	Good
Irr US018 over Cheyenne Ck	2020	3,274	Good
Irr US018 over Ck	2011	3,274	Good
Irr Bia Rte 27 over White River	1985	2,368	Fair
Irr US018 over Ck	2011	2,131	Good
Irr US018 over Trib. to White Clay Ck	2011	2,131	Good
Irr US018 over Trib. to White Clay Ck	2011	2,131	Good
Irr US018 over White Clay Ck	2011	2,131	Fair
Irr US018 over White Clay Ck	2011	2,131	Good
Irr Bia Rte 2 over Medicine Root Creek	1980	1,314	Fair
Irr US018 over Black Tail Ck	1953	1,294	Fair
Irr US018 over Slim Butte Ck	1953	1,294	Fair
Irr US018 over White Clay Ck	1953	1,294	Fair
Irr US018 over White Rv	1953	1,294	Fair
Irr US018 over Wounded Knee Ck	2017	1,170	Good
Irr US018 over Stinking Water Ck	1948	1,130	Fair
Irr US018 over Stinking Water Ck	2003	1,130	Good
Irr US018 over Stinking Water Ck	2003	1,130	Good
Irr Bia Rte 27 over Cottonwood Creek	1965	916	Fair
Irr Bia Rte 41 over White River	1976	624	Fair
Irr Bia Rte 33 over Wounded Knee Creek	2007	600	Good
Irr Bia Route 32 over White River	2012	500	Good
Irr Bia Rte 27 over Wounded Knee Tributary	2011	500	Good
Irr Bia Rte N over Trib of Medicine Root Ck	2013	200	Good
Irr Bia Rte 3202 over White River	1959	154	Fair
Irr Bia Rte 2 over White River	1973	134	Fair
Irr Bia Rte 2 over Trib of White River	2016	100	Good
Irr Bia Rte N over Trib of Medicine Root Ck	2013	100	Good
Irr Bia Rte N over Trib of Medicine Root Ck	2013	100	Good
Irr Bia Rte 8 over Wounded Knee Creek	2007	74	Good
Moccasin Park Rd over White Clay Creek	1975	50	Poor
Irr Bia Rte 49 over Route 27 Drain Channel	2023	25	Good
Smithwick Road over White River	1935	10	Poor

Source: FHWA National Bridge Inventory, 2025.

Oglala Lakota County bridge conditions · South Dakota bridges by county.

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