Boulder County, Colorado bridges (page 2 of 2)
Boulder County has 321 bridges and culverts in the National Bridge Inventory, the oldest built in 1917. 7 (2%) are rated poor. The most common type is culvert (38%).
All bridges in Boulder County
Busiest first · showing 201–321 of 321| Bridge | Location | Built | Type | Length | Daily traffic | Condition |
|---|---|---|---|---|---|---|
| Fordham Street over Dry Creek No. LONG-FORD-QUAIL | 0.3 MI So of Nelson Road | 1997 | Frame | 32 ft | 1,944 | Fair |
| Iris AVENUE/34 ST over Wonderland Creek No. BOLD-41-IRISAVE | Iris Ave and 34th St. | 2017 | Culvert | 50 ft | 1,937 | Fair |
| Indiana Avenue over Rock Creek No. SUPER-INDIANA | 150 Ft N of Coalton D | 1999 | Culvert | 29 ft | 1,916 | Fair |
| Marshall Road over Coal Creek No. SUPER-MARSHALL | 0.07 MI N of Creek View | 2022 | Box Beam or Girders - Multiple | 96 ft | 1,867 | Good |
| Eisenhower Drive over Empson Ditch No. BOLD-52-EISEN | 0.5 MI S of Arapahoe Ave | 1972 | Tee Beam | 33 ft | 1,860 | Fair |
| South Bowen Street over Left Hand Creek No. LONG-SBOW-MIS | At Missouri Ave | 1965 | Tee Beam | 31 ft | 1,835 | Poor |
| SH 7 Ml over North ST Vrain Creek No. D-14-I | 10 MI SE of Estes Park | 1973 | Tee Beam | 120 ft | 1,800 | Fair |
| Deerwood Drive over Oligarchy Ditch No. LONG-DRWD-SMRHK | 20 Ft W of CO RD 1 | 2000 | Culvert | 25 ft | 1,709 | Fair |
| Mohawk Drive over Bear Crk and Bike Path No. BOLD-21-1.20-01 | 0.25 MI No of Baseline RD | 1996 | Culvert | 21 ft | 1,707 | Good |
| CORD94(LH Cnyn Rd) over Lefthand Creek No. BC-94-11.7-LTA | 0.6 Miles West of Oldstag | 2016 | Box Beam or Girders - Multiple | 60 ft | 1,681 | Good |
| County Road 38 over Boulder Creek No. BC-38-6.7-BO1 | 1.5 MI W of CO RD 901 | 1988 | Tee Beam | 96 ft | 1,640 | Fair |
| 104th Street over Nwp No. NWP-06.98 | 6.98 MI from I-25 | 2002 | Stringer/Multi-beam or Girder | 240 ft | 1,520 | Fair |
| SH 72 Ml over South Boulder Creek No. E-15-AF | In Pinecliff | 1979 | Stringer/Multi-beam or Girder | 93 ft | 1,500 | Fair |
| Junction Pl over Goose Creek No. BOLD-42-JUNCTPL | 0.1 MI N of Pearl Pkwy | 2017 | Box Beam or Girders - Single or Spread | 79 ft | 1,484 | Fair |
| Junction Place over Boulder and Left Hand Di No. BOLD-55-JUNCTPL | 350 Ft S of Pearl Pkwy | 2021 | Culvert | 29 ft | 1,484 | Good |
| County Road 94 over Lefthand Creek No. BC-94-2.3-LT | 0.1 MI N of Olde Stage RD | 2019 | Box Beam or Girders - Multiple | 73 ft | 1,441 | Fair |
| No. 30th Street over Four Mile Creek No. BC-30TH-0.5-FMC | 300 Ft N of Palo Parkway | 1973 | Tee Beam | 72 ft | 1,424 | Poor |
| SH 72 Ml over Middle ST Vrain Creek No. D-14-G | 7 MI North of Ward | 1959 | Tee Beam | 111 ft | 1,400 | Fair |
| Mountain Dr. over Clover Basin Ditch No. LONG-MTNDR-NEL | 200 Ft S. of Four Leaf DR | 2018 | Culvert | 40 ft | 1,399 | Good |
| E 5th Avenue over Oligarchy Ditch No. LONG-E5TH-FOX | 0.1 MI East of Fox ST | 1970 | Culvert | 22 ft | 1,321 | Fair |
| SH 170 Ml over Community Ditch No. E-15-AA | E Ent Eldorado State Park | 1999 | Stringer/Multi-beam or Girder | 43 ft | 1,300 | Fair |
| South Sunset St. over Left Hand Creek No. LONG-SNST-CRKSD | 200 Ft N of Creekside DR | 2000 | Frame | 69 ft | 1,274 | Good |
| US 36 FR RD over Boulder Creek SR No. D-15-AP | 28th Street in Boulder | 1952 | Stringer/Multi-beam or Girder | 96 ft | 1,264 | Poor |
| Olympia Avenue over Spring Gulch No. LONG-OLYM-BOISE | 200 Feet E of Boise Court | 2000 | Culvert | 44 ft | 1,207 | Good |
| 34th Street over Wonderland Creek No. BOLD-46-34THST | 40 Ft S. of Iris Ave | 2018 | Culvert | 32 ft | 1,200 | Good |
| SH 170 Ml over Davidson Ditch No. E-15-AB | 1.5 MI W of JCT SH 93 | 1952 | Culvert | 24 ft | 1,200 | Fair |
| Monroe Drive over Empson Ditch No. BOLD-51-MONROE | 0.1 MI S of Colorado Ave. | 2020 | Tee Beam | 30 ft | 1,175 | Fair |
| Woodland RD (CR4) over Highland Ditch No. BC-4-1.3-ID | 1.3 Miles East of 75th ST | 1976 | Culvert | 25 ft | 1,163 | Fair |
| SH 72 Ml over South ST Vrain Creek No. D-15-H | 3.8 MI North of Ward | 1959 | Culvert | 22 ft | 1,100 | Fair |
| Nwp Ramp over EB Dillon Road No. NWP-06.29 | 6.29 MI from I-25 | 2002 | Stringer/Multi-beam or Girder | 292 ft | 1,100 | Fair |
| CR 62 (empire Dr) over Coal Creek No. BC-62-2.1-CO | 0.7 M E of ST HWY 42 | 1935 | Culvert | 34 ft | 1,080 | Fair |
| Lefthand Canyon DR over Lefthand Creek No. BC-106-7.3-LT | 0.75 MI W of Lee Hill DR | 2019 | Culvert | 27 ft | 1,078 | Good |
| Horizon Avenue over Rock Creek No. LAF-HORIZ-004 | .1 MI East 120th | 2000 | Culvert | 76 ft | 1,043 | Fair |
| Spring Drive over Davidson Ditch No. BC-O-OST-7C | 0.7 MI S of S. Boulder RD | 1970 | Slab | 25 ft | 1,022 | Good |
| Twin Lakes Road over Bldr and Whiterock Ditch No. BC-O-OSO-8A | 0.2 MI E of 63rd Street | 1975 | Culvert | 21 ft | 1,018 | Fair |
| ST Vrain Road CR16 over Boulder Feeder Ditch No. BC-16-1.9-ID | 0.5 MI E of CO RD 51 | 1955 | Tee Beam | 29 ft | 1,009 | Fair |
| Spencer Street over Oligarchy Ditch No. LONG-SPEN-21ST | 50 Ft So of 20th ST | 1975 | Culvert | 21 ft | 995 | Fair |
| Boston Ave over Spring Gulch No. LONG-BOSTON-AVE | 0.1 Mile E. of Martin St. | 2017 | Culvert | 25 ft | 978 | Fair |
| Second Avenue over St. Vrain Creek No. LY2ND-S.15-36 | 0.15 MI S of HWY 36 | 2021 | Stringer/Multi-beam or Girder | 142 ft | 946 | Good |
| Sterling Drive over Left Hand Ditch No. BOLD-33-STERDR | 100 Ft E of 47th Street | 1975 | Culvert | 20 ft | 937 | Fair |
| County Road 132 over Boulder Creek No. BC-132-0.1-BO | 75 Ft S of ST HWY 119 | 1935 | Box Beam or Girders - Multiple | 37 ft | 846 | Fair |
| Kingsridge Blvd. over Wonderland Creek No. BOLD-18-0.1-01 | 0.2 MI N of Valmont Drive | 1988 | Culvert | 88 ft | 812 | Fair |
| County Road 81 over James Creek No. BC-81-5.4-JA | 25 Ft S of Lefthand Cyn | 2019 | Box Beam or Girders - Multiple | 48 ft | 777 | Good |
| County Road 130 over Middle Boulder Creek No. BC-130-2.5-MB1 | 2.5 MI W of ST HWY 72 | 1990 | Box Beam or Girders - Single or Spread | 42 ft | 742 | Fair |
| CO RD 39 (65th St) over Lykins Gulch No. BC-39-9.0-LG | 0.8 Miles North of Nelson | 2012 | Culvert | 22 ft | 741 | Good |
| County Road 81 over Lefthand Creek No. BC-81-6.2-LT | 250 Ft N of Lee Hill DR | 2019 | Box Beam or Girders - Multiple | 60 ft | 735 | Good |
| Hygiene RD (cr 10) over Boulder Feeder Ditch No. BC-10-0.8-ID1 | 0.7 Mile East of US Highw | 1987 | Frame | 29 ft | 692 | Good |
| Juniper Avenue over Elmers Two Mile Ditch No. BOLD-09-0.05-01 | 200 Ft E of 26th Street | 1965 | Tee Beam | 35 ft | 666 | Fair |
| 48th Street over Goose Creek No. BOLD-49-48THST | Just N. of Pearl ST | 1980 | Culvert | 45 ft | 664 | Good |
| Martin Drive over Bear Crk and Bike Path No. BOLD-22-0.44-01 | 300 Ft. E of 36th St. | 1995 | Culvert | 33 ft | 662 | Fair |
| Golf Club Drive over Local Drainage No. BC-580802-0.1 | 0.1 MI So of Hogan Ct | 2005 | Culvert | 31 ft | 644 | Good |
| 48th Ct over S. Goose Creek No. BOLD-20-0.01-01 | 30 Ft N of Pearl Parkway | 1986 | Culvert | 44 ft | 641 | Good |
| County Road 84S over South St. Vrain Creek No. BC-84S-0.1-SSV1 | 0.1 Miles South of State | 1990 | Box Beam or Girders - Single or Spread | 58 ft | 637 | Fair |
| Winding Trail DR over Wonderland Creek No. BOLD-44-WNDGTRL | 300 Ft W of 28th | 2018 | Culvert | 51 ft | 632 | Fair |
| Wagonwheel Gap RD over Fourmile Creek No. BC-WWGAP-0.0-FM | 200 Ft W of Lee Hill DR | 2019 | Box Beam or Girders - Multiple | 59 ft | 630 | Good |
| Fairways Drive over Local Drainage No. BC-426606-0.4A | 0.4 MI S of Neva RD | 2005 | Culvert | 46 ft | 622 | Good |
| Wagonwheel Gap RD over Four Mile Creek No. BC-WWGAP-0.3-FM | 0.6 MI W of Lee Hill RD | 2019 | Culvert | 23 ft | 587 | Good |
| Independence Ave. over Boulder & Whiterock Dtch No. BC-46-1.6-ID | 0.4 MI E of ST HWY 119 | 1973 | Culvert | 20 ft | 574 | Fair |
| Kalmia Avenue over Elmers Two Mile Ditch No. BOLD-10-0.10-01 | 0.1 MI W of Folsom Street | 1973 | Culvert | 21 ft | 551 | Fair |
| Sunset Way over Dry Creek No. LONG-SUNS-KORT | 20 Ft SW of Korte Way | 1996 | Frame | 36 ft | 540 | Fair |
| SB Table Mesa Dr. over Bear Creek No. BOLD-36-TABMSAD | Harvard LN & SB Table | 1980 | Culvert | 25 ft | 508 | Fair |
| Hygiene RD (cr 10) over St. Vrain Creek No. BC-10-3.1-SV | 1.0 Miles West of County | 1981 | Stringer/Multi-beam or Girder | 104 ft | 502 | Fair |
| 2nd Avenue over Coal Creek No. SUPER-2ND-AVE | 0.2 MI South of Williams | 1992 | Slab | 66 ft | 492 | Fair |
| Wagonwheel Gap RD over Fourmile Creek No. BC-WWGAP-0.7-FM | 0.5 MI W of Lee Hill DR | 2019 | Culvert | 42 ft | 460 | Good |
| Dillon Road over Rock Creek No. BC-68-4.7-RO | 0.3 MI W of HWY 287 | 2019 | Culvert | 38 ft | 451 | Good |
| 15th Avenue over Oligarchy Ditch No. LONG-15TH-LAMP | 100 Ft W of Lamplighte DR | 1989 | Frame | 22 ft | 450 | Fair |
| N 115th ST over Highland Ditch No. BC-3-2.3-IDA | 0.95 MI N of Vermillion R | 2012 | Culvert | 23 ft | 435 | Good |
| Oxford RD (cr 26) over Boulder Feeder Ditch No. BC-26-4.1-ID | 0.3 MI W of CO RD 41 | 1950 | Stringer/Multi-beam or Girder | 29 ft | 422 | Fair |
| Wagonwheel Gap RD over Four Mile Creek No. BC-WWGAP-0.9-FM | 0.5 MI E of Bow Mnt. RD | 2019 | Culvert | 32 ft | 407 | Good |
| SH 170 Ml over South Boulder Creek No. E-15-AH | 0.9 MI W. of El Dorado SP | 1930 | Stringer/Multi-beam or Girder | 41 ft | 388 | Fair |
| Monarch Road over Dry Creek No. BC-36-2.8-DR2 | 800 Ft S of N 79th ST | 2019 | Culvert | 26 ft | 349 | Good |
| Marshall RD (cr 51 over South Boulder Creek No. BC-51-11.0-SB1 | 0.5 MI N of ST HWY 170 | 1988 | Slab | 38 ft | 318 | Fair |
| Golf Club Drive over Local Drainage No. BC-580802-0.4 | 0.4 MI So of Hogan Ct | 2005 | Culvert | 31 ft | 318 | Good |
| County Road 47 over St. Vrain Supply Canal No. BC-47-0.1-ID1 | 2.7 Miles North of State | 1997 | Box Beam or Girders - Single or Spread | 54 ft | 316 | Fair |
| Gilpin Drive over Bear Canyon Creek No. BOLD-47-GLPNDR | 350 Ft S of Evans DR | 1997 | Culvert | 20 ft | 281 | Good |
| Mc Sorley Lane over South Boulder Creek No. BC-O-OSR-9B | 0.1 MI W of Cherryvale RD | 1970 | Tee Beam | 52 ft | 272 | Fair |
| County Road 80 over North St. Vrain Creek No. BC-80-0.1-NSV1 | 20 Feet South of US High | 1988 | Box Beam or Girders - Single or Spread | 61 ft | 268 | Fair |
| County Road 1 over New Ish Ditch No. WEL001.0-036.0A | 3.4 MI N of ST HWY 66 | 1980 | Stringer/Multi-beam or Girder | 25 ft | 260 | Fair |
| Wildwood Road over Bear Canyon Creek No. BOLD-11-0.00-01 | 150 Ft W of Bear Mtn. RD | 1970 | Culvert | 27 ft | 242 | Good |
| Logan Mill Road over Four Mile Creek No. BC-118S-0.0-FM | 20 Ft W of Four MI Cny DR | 2019 | Box Beam or Girders - Multiple | 63 ft | 238 | Fair |
| N 41st ST (cr 59) over Left Hand Creek No. BC-59-2.4-LT | 325 Ft S of CO RD 26 | 1960 | Slab | 32 ft | 226 | Fair |
| Aurora Avenue over Gregory Creek No. BOLD-35-AURORAA | 15 Ft. W of 6th Street | 1980 | Culvert | 21 ft | 226 | Good |
| County Road 124E over North Boulder Creek No. BC-124E-0.1-NB1 | 0.1 MI NE of ST HWY 7 | 1994 | Frame | 30 ft | 214 | Fair |
| Boulder Hills DR over Boulder Feeder Ditch No. BC-O-OSJ-9A | 50 Ft E of Stirrup Lane | 1980 | Tee Beam | 46 ft | 209 | Fair |
| 27th Street over Goose Creek No. BOLD-39-27THST | 50 Ft N of Mapleton Ave | 2001 | Box Beam or Girders - Single or Spread | 68 ft | 201 | Good |
| NFSR 112.0 over South ST Vrain Creek No. 021001000015812 | W. Side of Brainard Lake | 2011 | Frame | 26 ft | 200 | Good |
| County Road 80 over North St. Vrain Creek No. BC-80-0.8-NSV1 | 0.8 Miles West of US High | 1988 | Box Beam or Girders - Single or Spread | 50 ft | 199 | Fair |
| Fdr 114 over Middle St. Vrain Creek No. 021004000001199 | .2 MI W of CO HWY 72 | 1952 | Slab | 31 ft | 198 | Good |
| N 49th ST (cr 51) over Left Hand Creek No. BC-51-5.3-LT1 | 0.5 MI N of CO RD 34 | 1993 | Box Beam or Girders - Single or Spread | 58 ft | 191 | Good |
| N 81st ST (cr 31) over Left Hand Creek No. BC-31-8.6-LT1 | 0.1 M N of Oxford RD (26) | 1992 | Box Beam or Girders - Single or Spread | 56 ft | 182 | Good |
| Prospect Road CR24 over Boulder Feeder Ditch No. BC-24-0.3-ID1 | 0.3 MI E of CO RD 57 | 1988 | Frame | 32 ft | 180 | Fair |
| Main Street over James Creek No. JMSTN-LOWER-B | Inter of Main and Mill | 2018 | Box Beam or Girders - Multiple | 60 ft | 180 | Good |
| County Road 71 over North St. Vrain Creek No. BC-71-2.4-NSV1 | 30 Feet South of US Highw | 1991 | Arch - Thru | 76 ft | 178 | Fair |
| County Road 103 over Middle St. Vrain Creek No. BC-103-0.5-MSV1 | 0.5 Mile South West of ST | 1993 | Slab | 43 ft | 170 | Fair |
| CR124E-HUMMER Dr. over North Boulder Creek No. BC-124E-1.2-NB1 | 1.2 MI NE of ST HWY 73 | 1994 | Frame | 30 ft | 135 | Fair |
| C. R. 41 (63rd St) over St. Vrain Creek No. BC-41-1.4-SV1 | 0.5 Miles North of County | 1991 | Box Beam or Girders - Single or Spread | 59 ft | 134 | Fair |
| Bow Mountain Rd. over Fourmile Creek No. BC-BMTN-0.1-FMC | 20 Ft S of Wagonwheel RD | 2019 | Box Beam or Girders - Multiple | 44 ft | 124 | Good |
| County Road 84W over North St. Vrain Creek No. BC-84W-1.0-NSV | 1.0 Mile Northwest of Sta | 1927 | Tee Beam | 45 ft | 122 | Fair |
| County Road 26 over Left Hand Creek No. BC-26-5.3-LT1 | 0.6 MI W of CO RD 33 | 1991 | Box Beam or Girders - Single or Spread | 60 ft | 121 | Good |
| Anderson Hill ST over James Creek No. JMSTN-UPPER-A | 200 Ft South of Main Stre | 2016 | Box Beam or Girders - Multiple | 61 ft | 117 | Good |
| County Road 103 over Middle St. Vrain Creek No. BC-103-1.3-MSV1 | 200 Feet South of Raymond | 1993 | Slab | 43 ft | 112 | Good |
| Sixth ST (cr 130) over Middle Boulder Creek No. BC-130-3.3-MB | .1 MI S CR 130ELDORADO RD | 2005 | Frame | 32 ft | 106 | Fair |
| Niwot Meadow Farm over Dry Creek No 2 No. BC-572705-0.2DR | 0.2 MI E of 83rd ST | 2005 | Box Beam or Girders - Single or Spread | 74 ft | 102 | Fair |
| Strath Street over Left Hand Creek No. BC-O-OSK-9A | 0.2 MI N of Niwot RD | 1970 | Culvert | 29 ft | 92 | Fair |
| Fdr 114 over Middle St. Vrain Creek No. 021004000001203 | 0.94 MI West of CO HWY 72 | 1952 | Slab | 30 ft | 90 | Good |
| County Road 128E over North Boulder Creek No. BC-128E-3.9-NB1 | 3.9 MI E of ST HWY 72 | 1994 | Frame | 34 ft | 80 | Fair |
| Rogers Road over Lykin Gulch No. LONG-ROGR-AIRRD | 0.25 MI W of Airport RD | 2000 | Culvert | 162 ft | 80 | Fair |
| County Road 35 over St. Vrain Creek No. BC-35-0.2-SV1 | 0.2 Miles South of County | 1996 | Stringer/Multi-beam or Girder | 94 ft | 78 | Fair |
| Wild Basin Road over North St. Vrain Creek No. 1520011P0000000 | HWY 7 to Wild Basin Trail | 1982 | Tee Beam | 29 ft | 75 | Fair |
| Wild Basin Road over North St. Vrain Creek No. 1520012P0000000 | 2.1 Miles from Park Bound | 1982 | Tee Beam | 25 ft | 75 | Fair |
| County Road 116 over Boulder Creek No. BC-116-3.3-BO1 | 3.3 MI West of ST HWY 72 | 1995 | Stringer/Multi-beam or Girder | 28 ft | 74 | Fair |
| CO RD 54A over Middle Boulder Creek No. BCPOS-LOWER BR | Castle Rock Pull Off | 1917 | Slab | 24 ft | 70 | Fair |
| County Road 84S over South St. Vrain Creek No. BC-84S-1.6-SSV1 | 250 Ft S of HWY 7 | 2019 | Truss - Thru | 182 ft | 67 | Fair |
| CO RD 54A over Middle Boulder Creek No. BCPOS-UPPER BR | Castle Rock Pull Off | 1917 | Girder and Floorbeam System | 33 ft | 66 | Fair |
| County Road 96 over South St. Vrain Creek No. BC-96-0.1-SSV1 | 100 Feet West of State Hi | 2000 | Stringer/Multi-beam or Girder | 25 ft | 64 | Fair |
| County Road 9 over Boulder Creek No. BC-9-0.9-BO | 0.3 MI N of CO RD 42 | 1960 | Tee Beam | 77 ft | 59 | Fair |
| County Road 103 over Middle St. Vrain Creek No. BC-103-4.0-MSV | 100 Feet S of State High | 1927 | Tee Beam | 35 ft | 56 | Fair |
| Fdr 112 over South ST Vrain Creek No. 021004000001202 | 5.75 MI West of CO HWY 72 | 1989 | Slab | 41 ft | 50 | Fair |
| Fdr 298 & Bc 116 over North Boulder Creek No. 021001000001000 | 3.45 MI SW of CO HWY 72 | 1970 | Stringer/Multi-beam or Girder | 28 ft | 40 | Fair |
| Boulder Creek Path over Boulder Creek No. BCPOS-FOURMILE | 4MI Canyon Path at SH119 | 2020 | Stringer/Multi-beam or Girder | 45 ft | 11 | Fair |
| Spring Creek Place over Wonderland Creek No. BOLD-43-SPRGCRK | 570 Ft from 34th St. | 2017 | Culvert | 94 ft | — | Good |