Union County, South Dakota bridges

Union County has 169 bridges and culverts in the National Bridge Inventory, the oldest built in 1930. 41 (24%) are rated poor. The most common type is stringer/multi-beam or girder (36%).

Bridges: 169
Good: 30%
Fair: 46%
Poor: 24%; 41 bridges
Average age: 48.4 yrs
Posted or closed: 37

Map of bridges in Union County

Green good, amber fair, red poor. Click a marker for details.

Search bridges in Union County

Type at least two characters, or pick a condition or type, to search every bridge in the county.

Condition

Good30%(51)

Fair46%(77)

Poor24%(41)

When they were built

Bridges built per decade. Year built as recorded in the inventory; reconstruction years are not included.

Busiest

I029 S over Big Sioux Rv
18,090 vehicles/day
Good
I029 N over Big Sioux Rv
18,090 vehicles/day
Fair
I029 over Ck
11,970 vehicles/day
Good
I029 over Ck
11,970 vehicles/day
Good
I029 over Ck
11,970 vehicles/day
Good

Longest

48580 County RD 13 over Big Sioux Rv
580 ft
Fair
I029 N over Big Sioux Rv
558 ft
Fair
I029 S over Big Sioux Rv
557 ft
Good
SD46 over Big Sioux River
518 ft
Fair
SD050 over Big Sioux River
506 ft
Good

Oldest

47850 299th ST over East Brule Ck
Built 1930
Fair
30820 480 Ave. over Ck
Built 1935
Poor
47340 310th ST over Ck
Built 1935
Poor
31150 475th Ave over Ck
Built 1939
Fair
48190 308 Str. over Ck
Built 1940
Fair

All bridges in Union County

Busiest first · showing 1–169 of 169

Bridges in Union County
Bridge	Location	Built	Type	Length	Daily traffic	Condition
I029 S over Big Sioux Rv No. 000000064164405	At Iowa State Line	1990	Stringer/Multi-beam or Girder	557 ft	18,090	Good
I029 N over Big Sioux Rv No. 000000064165405	At Iowa State Line	1963	Stringer/Multi-beam or Girder	558 ft	18,090	Fair
I029 over Ck No. 000000064006104	5.6 N Sd 48 Interch	1961	Culvert	29 ft	11,970	Good
I029 over Ck No. 000000064006108	5.2 N Sd 48 Interch	1961	Culvert	29 ft	11,970	Good
I029 over Ck No. 000000064006115	4.5 N Sd 48 Interch	1961	Culvert	21 ft	11,970	Good
I029 S over River Drive No. 000000064154385	N Sioux City Interchange	1981	Slab	126 ft	9,870	Good
I029 N over River Drive No. 000000064155385	N Sioux City Interchange	1981	Slab	126 ft	9,870	Good
I029 S over 302 ST (fas 6372) No. 000000064005050	5 S Sd 46 Interchange	1960	Slab	119 ft	8,020	Fair
I029 N over 302 ST (fas 6372) No. 000000064006050	5 S Sd 46 Interchange	1960	Slab	119 ft	8,020	Poor
I029 S over Ck No. 000000064005164	0.4 S Sd 48 Interch	1961	Slab	67 ft	7,770	Fair
I029 N over Ck No. 000000064006164	0.4 S Sd 48 Interch	1961	Slab	67 ft	7,770	Fair
I029 S over Bn RR No. 000000064055268	0.2 N of W Elkpoint Intch	1960	Stringer/Multi-beam or Girder	185 ft	7,235	Fair
I029 S over SD029 L No. 000000064055269	W Elk Point Interchange	1993	Stringer/Multi-beam or Girder	188 ft	7,235	Fair
I029 N over Bn RR No. 000000064056268	0.2 N of W Elkpoint Intch	1960	Stringer/Multi-beam or Girder	181 ft	7,235	Fair
I029 N over SD029 L No. 000000064056269	W Elk Point Interchange	1994	Stringer/Multi-beam or Girder	188 ft	7,235	Good
Dakota Dunes Blvd over I029 No. 000000064158399	1.6 S Nscity Interchange	1991	Stringer/Multi-beam or Girder	253 ft	5,584	Fair
SD046 over I029 No. 000000064006000	Sd 46 Interchange	2000	Stringer/Multi-beam or Girder	237 ft	4,726	Good
SD029 P over I029 No. 000000064149367	1.9 N of N Sioux City Int	1961	Box Beam or Girders - Multiple	293 ft	3,276	Fair
SD029 L over I029 No. 000000064070287	E Elk Point Interchange	1960	Box Beam or Girders - Multiple	293 ft	2,305	Fair
SD046 over West Brule Ck No. 000000064054000	3.7 E of Beresford	2024	Culvert	57 ft	1,994	Good
SD046 over Br East Brule Ck No. 000000064087000	7.1 E of Beresford	2024	Culvert	28 ft	1,994	Good
SD046 over East Brule Ck No. 000000064096000	7.9 E of Beresford	1954	Slab	106 ft	1,745	Fair
SD046 over Ck No. 000000064135000	11.9 E of Beresford	1954	Culvert	23 ft	1,745	Fair
SD046 over Ck No. 000000064160011	1 N Iowa State Line	1954	Culvert	20 ft	1,725	Fair
SD46 over Big Sioux River No. 000000064160023	At South Dakota Border	1991	Stringer/Multi-beam or Girder	518 ft	1,610	Fair
SD011 over Ck No. 000000064090045	4.6 S JCT Sd 46	1965	Culvert	25 ft	1,575	Good
SD050 over Big Sioux River No. 000000064086223	At South Dakota Border	2010	Stringer/Multi-beam or Girder	506 ft	1,570	Good
SD050 over I029 No. 000000064008205	Sd 50 Interchange	1960	Box Beam or Girders - Multiple	293 ft	1,366	Fair
SD050 over Ck No. 000000064012207	0.5 E I 29 Interch	2017	Culvert	25 ft	1,366	Good
SD011 over East Brule Ck No. 000000064090005	0.5 S JCT Sd 46	1965	Slab	93 ft	1,294	Fair
SD011 over East Brule Ck No. 000000064090022	2.2 S JCT Sd 46	1965	Culvert	29 ft	1,294	Good
SD050 over Brule Ck No. 000000064067223	2.1 W Iowa Line	1960	Slab	106 ft	1,292	Fair
SD050 over Drainage Ditch No. 000000064077223	0.9 W Iowa Line	1960	Culvert	28 ft	1,292	Fair
SD048 over West Union Ck No. 000000064101160	2.5 W Iowa State Line	1960	Slab	117 ft	1,173	Fair
SD048 over East Union Ck No. 000000064105161	2.1 W Iowa State Line	1960	Slab	117 ft	1,173	Fair
SD048 over Drainage Ditch No. 000000064115166	0.9 W Iowa State Line	1960	Slab	60 ft	1,173	Fair
SD048 over I029 No. 000000064006160	Sd 48 Interchange	1961	Stringer/Multi-beam or Girder	254 ft	847	Fair
SD011 over Drainage Ditch No. 000000064060241	1.9 S JCT Sd 50	1983	Stringer/Multi-beam or Girder	70 ft	776	Fair
SD048 over Brule Ck No. 000000064039159	3.5 E I 29 Interch	1957	Slab	186 ft	758	Fair
SD048 over Ck No. 000000064043159	3.8 E I 29 Interch	1957	Slab	106 ft	758	Fair
SD048 over Ck No. 000000064050160	4.5 E I 29 Interch	1956	Culvert	29 ft	758	Fair
47860 307th ST over West Union Ck No. 000000064086100	6S & 0.4W Alcester	1950	Culvert	25 ft	500	Good
48480 CO HWY 13 over Green Ck No. 000000064148058	1.8S & 5.8E Alcester	1985	Tee Beam	51 ft	500	Poor
48580 County RD 13 over Big Sioux Rv No. 000000064158059	6.5E & 1.9S Alcester	1979	Stringer/Multi-beam or Girder	580 ft	500	Fair
330th Street over I029 No. 000000064115330	Jefferson Interchange	1961	Box Beam or Girders - Multiple	365 ft	488	Fair
47160 302 ST over Ck No. 000000064016050	5S Beresford	1960	Culvert	21 ft	450	Fair
47400 302 St. over West Brule Ck No. 000000064042050	4.8W & 1S Alcester	1960	Slab	106 ft	435	Poor
SD011 over West Union Ck No. 000000064090124	12.4 S JCT Sd 46	1969	Slab	120 ft	406	Fair
30820 471 Ave. over Brule Ck No. 000000064010112	10.2S Beresford	2016	Slab	146 ft	400	Good
30890 471 Ave. over Brule Ck No. 000000064010119	10.9S Beresford	2017	Slab	132 ft	400	Good
31450 471 Ave. over Ck No. 000000064010175	16.5S Beresford	1955	Culvert	33 ft	400	Good
30599 River Road over Ck No. 000000064145090	5S & 5.5E Alcester	1989	Channel Beam	36 ft	325	Good
30330 River Road over Ck No. 000000064148063	2S & 5.3E Alcester	1972	Channel Beam	37 ft	325	Poor
30999 477th Ave over Ck No. 000000064070130	9S & 2W Alcester	1989	Channel Beam	26 ft	300	Poor
31490 477th Ave over Br Brule Ck No. 000000064070179	4.3N JCT Sd 50	1955	Culvert	25 ft	300	Poor
31800 477th Ave over Ck No. 000000064070210	1.2N JCT Sd 50	1948	Culvert	31 ft	300	Good
31870 477th Ave over County Ditch No. 000000064070217	0.5N JCT Sd 50	1948	Culvert	44 ft	300	Good
30300 475th Ave over East Brule Ck No. 000000064050060	4W & 2S Alcester	2017	Slab	103 ft	280	Good
306 ST (fas 6370) over I029 No. 000000064006090	9.0 S Sd 46 Interchange	1960	Stringer/Multi-beam or Girder	252 ft	270	Fair
47580 302nd ST over East Brule Ck No. 000000064058050	3.2W & 1S Alcester	1960	Slab	140 ft	270	Poor
472 Ave over I029 No. 000000064020220	2.2 SE Sd 50 Interch	1960	Slab	254 ft	250	Fair
484 Ave over I029 No. 000000064140355	3.4 NW N Scity Interch	1961	Box Beam or Girders - Multiple	365 ft	240	Fair
47190 307 St. over East Brule Ck No. 000000064019100	1.5S & 2E Alsen	2013	Tee Beam	97 ft	235	Good
482 Ave over I029 No. 000000064120336	0.5 SE Jefferson Interch	1961	Box Beam or Girders - Multiple	365 ft	195	Fair
48510 299th Str. over Finnie Ck No. 000000064151020	6.1E & 2N Alcester	2020	Culvert	29 ft	185	Good
47730 309 Str. over Ck No. 000000064073120	7.5S & 1.7W Alcester	1977	Stringer/Multi-beam or Girder	33 ft	180	Fair
30520 475th Ave over Ck No. 000000064050082	4W & 4.2S Alcester	2009	Culvert	29 ft	150	Good
480 Ave (fas 6285) over I029 No. 000000064100315	2.2 NW Jefferson Interch	1961	Box Beam or Girders - Multiple	365 ft	150	Fair
31390 481st Ave over Drainage Ditch No. 000000064110169	10.1N & 5E Elk Point	1976	Tee Beam	101 ft	140	Fair
30620 475th Ave over Ck No. 000000064050092	4W & 5.2S Alcester	2022	Culvert	29 ft	125	Good
47910 299 ST over Ck No. 000000064091020	2N & 0.1E Alcester	2004	Culvert	24 ft	125	Fair
47700 301 ST over Ck No. 000000064076040	1W Alcester	2004	Culvert	27 ft	120	Fair
300 ST over I029 No. 000000064006030	3 S Sd 46 Interch	2024	Stringer/Multi-beam or Girder	244 ft	115	Good
47440 298th ST over West Brule Ck No. 000000064046010	2.6E Beresford	2008	Culvert	37 ft	110	Good
48050 311th ST over East Union Ck No. 000000064105140	9.5S & 1.5E Alcester	1950	Channel Beam	51 ft	110	Poor
31880 472 Ave over Big Ditch Ck No. 000000064020218	4.0W & 5.2N Elk Point	2006	Culvert	29 ft	105	Fair
SD048 Ef over Ck No. 000000064003160	0.3 W I29 & SD48 Interch	1961	Culvert	37 ft	100	Fair
47930 311th ST over West Union Ck No. 000000064093140	9.5S & 0.3E Alcester	1981	Tee Beam	41 ft	100	Fair
48190 308 Str. over Ck No. 000000064119110	6.5S & 2.9E Alcester	1940	Stringer/Multi-beam or Girder	26 ft	100	Fair
31150 475th Ave over Ck No. 000000064050145	2E & 1.5N Spink	1939	Slab	36 ft	97	Fair
31260 475th Ave over Ck No. 000000064050156	2MI E. & 0.5 N. of Spink	2000	Tee Beam	35 ft	97	Fair
SD011 Sf over East Brule Ck No. 000000064089010	1.0 S JCT Sd 46	1984	Culvert	25 ft	96	Good
298 ST over I029 No. 000000064006010	1 S Sd 46 Interch	1960	Stringer/Multi-beam or Girder	254 ft	95	Fair
30490 473 Ave over Brule Ck No. 000000064030079	1E & 6.9S Beresford	1940	Channel Beam	72 ft	75	Fair
29895 Boyer Ave over Ck No. 000000064145019	12.5E & 0.9S Beresford	1992	Stringer/Multi-beam or Girder	28 ft	70	Poor
478 Ave over I029 No. 000000064080296	1.3 SE of Elk Point	1961	Box Beam or Girders - Multiple	365 ft	65	Fair
31490 475th ST over Brule Ck No. 000000064049179	2.5N & 4E Junction City	1977	Tee Beam	120 ft	60	Poor
48250 Virginia RD over Ck No. 000000064125035	3.5E & 0.5N Alcester	1991	Stringer/Multi-beam or Girder	45 ft	55	Fair
48296 307th ST over Ck No. 000000064129100	5.5S & 3.9E Alcester	1977	Tee Beam	26 ft	55	Fair
48480 298th ST over Ck No. 000000064148010	12.8E Beresford	1987	Stringer/Multi-beam or Girder	55 ft	55	Poor
47280 319th Str. over Drainage Ditch No. 000000064028220	5N & 3.2W Elk Point	1940	Channel Beam	50 ft	50	Fair
30040 473 Ave. over Ck No. 000000064030034	1E & 2.4S Beresford	2024	Culvert	25 ft	50	Good
47380 301st ST over West Brule Ck No. 000000064038040	3S & 1.8E Beresford	2010	Culvert	45 ft	50	Good
31180 476th Ave over Ck No. 000000064060148	3E & 1.2N Spink	1993	Stringer/Multi-beam or Girder	36 ft	50	Fair
47610 312th ST over Ck No. 000000064061150	3E & 1N Spink	1992	Stringer/Multi-beam or Girder	24 ft	50	Poor
47670 301 St. over East Brule Ck No. 000000064067040	1.8W Alcester	1944	Tee Beam	74 ft	50	Good
32050 478th Ave over Brule Ck No. 000000064077235	1.4S Richland	1983	Slab	97 ft	50	Fair
SD011 Sf over West Union Ck No. 000000064090120	4.0 N JCT Sd 48	1969	Culvert	21 ft	50	Good
30880 River RD over Ck No. 000000064133118	3E & 1.7S Big Springs	1979	Tee Beam	51 ft	50	Fair
48340 301st over Ck No. 000000064134040	3.4E Alcester	2023	Culvert	23 ft	50	Good
47230 305 Str. over Ck No. 000000064023080	7S & 0.3E Beresford	1987	Stringer/Multi-beam or Girder	32 ft	45	Poor
32050 475th Ave over Drainage Ditch No. 000000064050235	1W & 3.5N Elk Point	1993	Stringer/Multi-beam or Girder	65 ft	45	Fair
32015 477th Ave over Ck No. 000000064073231	3.9N & 1.3E Elk Point	1997	Slab	100 ft	45	Good
31900 Lawrence RD over Ck No. 000000064074220	5N & 2E Elk Point	1977	Tee Beam	26 ft	45	Good
30010 478 Ave. over Ck No. 000000064080031	0.5W & 0.9N Alcester	1982	Stringer/Multi-beam or Girder	51 ft	45	Poor
30040 478 Ave. over Drainage Ditch No. 000000064080034	0.5W & 0.6N Alcester	1983	Stringer/Multi-beam or Girder	40 ft	45	Poor
47850 299th ST over East Brule Ck No. 000000064085020	2N & 0.5W Alcester	1930	Channel Beam	72 ft	45	Fair
47880 306 Str. over Ck No. 000000064088090	5S & 0.2W Alcester	1950	Stringer/Multi-beam or Girder	32 ft	45	Poor
48020 309 Str. over East Union Ck No. 000000064102120	7.5S & 1.2E Alcester	1950	Stringer/Multi-beam or Girder	40 ft	45	Poor
48060 306 Str. over East Union Ck No. 000000064106090	4S & 1.6E Alcester	1986	Stringer/Multi-beam or Girder	27 ft	45	Fair
48140 312th ST over Ck No. 000000064114150	10.5S & 2.4E Alcester	1940	Stringer/Multi-beam or Girder	25 ft	45	Poor
30320 482nd Ave over Ck No. 000000064120062	3E & 2.2S Alcester	1983	Channel Beam	26 ft	45	Poor
30310 483rd Ave over Ck No. 000000064130061	4E & 2.1S Alcester	1983	Stringer/Multi-beam or Girder	27 ft	45	Poor
48310 303rd ST over Ck No. 000000064131060	1.5S & 4.1E Alcester	1982	Stringer/Multi-beam or Girder	41 ft	45	Fair
47320 304 Str over Ck No. 000000064032070	6S & 1.2E Beresford	1970	Channel Beam	26 ft	43	Poor
30630 473 Ave. over Ck No. 000000064030093	1E & 8.3S Beresford	1978	Stringer/Multi-beam or Girder	24 ft	41	Good
47290 305 Str. over Brule Ck No. 000000064029080	8S & 1.2E Beresford	1994	Slab	100 ft	40	Good
31080 473 Ave. over Ck No. 000000064030136	1E & 12.6S Beresford	1950	Culvert	21 ft	40	Fair
47320 305 Str over Brule Ck No. 000000064032080	7S & 2.2E Beresford	1989	Stringer/Multi-beam or Girder	60 ft	40	Poor
31410 474th Ave over Brule Ck No. 000000064038171	1.8E & 16.1S Beresford	1986	Slab	107 ft	40	Good
30070 474th Ave over West Brule Ck No. 000000064040037	2E & 2.7S Beresford	1982	Stringer/Multi-beam or Girder	49 ft	40	Poor
30590 474th Ave over Ck No. 000000064040089	2E & 7.9S Beresford	1983	Tee Beam	41 ft	40	Fair
47460 304 Str. over Brule Ck No. 000000064046070	6S & 2.6E Beresford	1987	Stringer/Multi-beam or Girder	61 ft	40	Poor
32200 477th Ave over Lewis Ditch No. 000000064070250	1E & 2N Elk Point	1968	Channel Beam	63 ft	40	Poor
32201 478th Ave. over Lewis Ditch No. 000000064080251	2E & 1.9N Elk Point	1940	Channel Beam	62 ft	40	Poor
47920 310th ST over West Union Ck No. 000000064092130	8.5S & 0.2E Alcester	2020	Culvert	21 ft	40	Good
47960 312th ST over West Union Ck No. 000000064096150	11.5S & 0.6E Alcester	1986	Stringer/Multi-beam or Girder	79 ft	40	Poor
30820 480 Ave. over Ck No. 000000064100112	1E & 6.2S Alcester	1935	Stringer/Multi-beam or Girder	25 ft	40	Poor
48030 310 Str. over East Union Ck No. 000000064103130	8.5S & 1.3E Alcester	1948	Stringer/Multi-beam or Girder	43 ft	40	Poor
30430 474 Ave. over East Brule Ck No. 000000064040073	2E & 6.3S Beresford	1986	Stringer/Multi-beam or Girder	61 ft	36	Fair
47160 310 Str. over Brule Ck No. 000000064016130	12S & 0.4E Beresford	1970	Channel Beam	72 ft	35	Poor
31128 472nd Ave.Rd over Brule Ck No. 000000064020141	13.1S Beresford	1985	Girder and Floorbeam System	80 ft	35	Poor
47230 306 Str. over Brule Ck No. 000000064023090	8S & 0.3E Beresford	1979	Tee Beam	77 ft	35	Poor
47250 300 Str. over Ck No. 000000064025030	2S & 0.5E Beresford	1950	Culvert	29 ft	35	Fair
47340 306 Str. over Ck No. 000000064034090	8S & 1.4E Beresford	1948	Stringer/Multi-beam or Girder	32 ft	35	Poor
31160 474th Ave over Ck No. 000000064040146	2E & 13.6S Beresford	1945	Stringer/Multi-beam or Girder	25 ft	35	Fair
30940 476th Ave over Ck No. 000000064060124	4E & 11.4S Beresford	2016	Tee Beam	36 ft	35	Good
31070 476th Ave over Ck No. 000000064060137	4E & 12.7S Beresford	1963	Stringer/Multi-beam or Girder	56 ft	35	Poor
31590 476 TH Ave over Brule Ck No. 000000064060189	8.1N Elk Point	2004	Tee Beam	61 ft	35	Fair
47700 300 Str. over Ck No. 000000064070030	1N & 2W Alcester	1982	Stringer/Multi-beam or Girder	27 ft	35	Poor
30770 478 Ave. over Ck No. 000000064080107	1W & 6.7S Alcester	1940	Stringer/Multi-beam or Girder	23 ft	35	Fair
47870 308 Str. over West Union Ck No. 000000064087110	7S & 0.3W Alcester	1957	Stringer/Multi-beam or Girder	40 ft	35	Fair
48080 308 Str. over East Union Ck No. 000000064108110	6.5S & 1.8E Alcester	1996	Stringer/Multi-beam or Girder	32 ft	35	Fair
30250 484th Ave over Ck No. 000000064144055	5.4E & 1.5S Alcester	2021	Tee Beam	71 ft	34	Good
47610 316 ST over Brule Ck No. 000000064061190	8.0N & 0.1E Elk Point	2006	Stringer/Multi-beam or Girder	110 ft	32	Good
30330 472 Ave. over Ck No. 000000064020063	5.3S Beresford	1973	Stringer/Multi-beam or Girder	25 ft	30	Poor
30650 472 Ave. over Brule Ck No. 000000064021095	8.5S Beresford	1989	Slab	113 ft	30	Good
47260 311 ST over Ck No. 000000064026140	13S & 0.6E Beresford	1991	Stringer/Multi-beam or Girder	27 ft	30	Fair
31270 473rd Ave over Brule Ck No. 000000064030157	1E & 14.7S Beresford	1976	Tee Beam	98 ft	30	Fair
475 Ave over I029 No. 000000064050250	6.2 SE Sd 50 Interch	1960	Slab	254 ft	30	Fair
47560 312th ST over Ck No. 000000064056150	14S & 3.6E Beresford	2007	Culvert	22 ft	30	Good
47570 311 Str. over Ck No. 000000064057140	13S & 3.7E Beresford	1955	Stringer/Multi-beam or Girder	51 ft	30	Poor
47605 310th ST over Ck No. 000000064061130	12S & 4.1E Beresford	2020	Culvert	21 ft	30	Good
47690 310th ST over Ck No. 000000064069130	8.5S & 2.1W Alcester	2020	Culvert	21 ft	30	Good
48150 313th St. over Drainage Ditch No. 000000064115160	11.5S & 2.5E Alcester	1950	Culvert	21 ft	30	Good
307 ST over I029 No. 000000064006100	10 S Sd 46 Interch	1961	Stringer/Multi-beam or Girder	254 ft	25	Fair
47110 309 Str. over Brule Ck No. 000000064011120	11S & 0.1E Beresford	1989	Slab	132 ft	25	Good
47180 311th Street over Brule Ck No. 000000064018140	13S & 0.8E Beresford	2002	Stringer/Multi-beam or Girder	90 ft	25	Fair
47340 310th ST over Ck No. 000000064034130	12S & 1.4E Beresford	1935	Stringer/Multi-beam or Girder	31 ft	25	Poor
47380 312th ST over Ck No. 000000064038147	13.7S & 1.8E Beresford	2007	Culvert	40 ft	25	Fair
30600 476 Ave. over Ck No. 000000064060090	8S & 4E Beresford	1965	Stringer/Multi-beam or Girder	22 ft	25	Poor
48040 312th ST over East Union Ck No. 000000064104150	10.5S & 1.4E Alcester	1950	Stringer/Multi-beam or Girder	31 ft	25	Poor
29730 484th Ave over Ck No. 000000064140003	12E & 0.3S Beresford	1983	Girder and Floorbeam System	40 ft	25	Poor
309 ST over I029 No. 000000064006120	4 N Sd 48 Interch	1961	Stringer/Multi-beam or Girder	254 ft	20	Fair
47330 312th ST over Ck No. 000000064032147	13.7S & 1.2E Beresford	1950	Culvert	21 ft	20	Good
47659 320 St. over Brule Ck No. 000000064067230	4.0N & 0.7E Elk Point	2005	Stringer/Multi-beam or Girder	74 ft	15	Fair
47690 305 Str. over Ck No. 000000064069080	7S & 4.9E Beresford	1989	Stringer/Multi-beam or Girder	41 ft	15	Fair
31140 474th Ave over Ck No. 000000064040144	13.4S & 2E Beresford	1983	Tee Beam	38 ft	5	Good
SD048 over Big Sioux Rv No. 000000064122170	Sd/Ia Border - Akron	1996	Stringer/Multi-beam or Girder	490 ft	—	Fair

Structure types in Union County

Stringer/Multi-beam or Girder	61	36.1%
Culvert	40	23.7%
Slab	29	17.2%
Tee Beam	17	10.1%
Channel Beam	12	7.1%
Box Beam or Girders - Multiple	8	4.7%
Girder and Floorbeam System	2	1.2%