| Sully Road over Tributary Horsepen Run | 1963 | 184,788 | Fair |
| Sully Rd. over Cabin Branch | 1963 | 127,227 | Fair |
| Rte. 28 SB over Dulles Access Road | 1988 | 93,735 | Good |
| Rte. 28 NB over Dulles Access Rd | 1963 | 93,735 | Fair |
| Sully Road RTE.28 over Merrybrook Run | 1961 | 84,996 | Fair |
| Harry Byrd Highway over Broad Run | 1949 | 71,111 | Fair |
| Harry Byrd Highway over Broad Run | 1969 | 71,111 | Fair |
| Dulles Greenway over Trib. Horsepen Run | 1994 | 70,185 | Fair |
| Waxpool Road over Rte. 28 - Sully Road | 2004 | 61,481 | Good |
| Waxpool Road over Trib. of Broad Run | 1987 | 61,481 | Good |
| Leesburg Pike over Goose Creek | 1991 | 60,579 | Fair |
| Leesburg Pike over Goose Creek | 1971 | 60,579 | Fair |
| 7 BYPASS & Ramps over Tuscarora Creek | 1972 | 60,248 | Fair |
| Route 7 Bypass WB over Ivandale Road | 1980 | 58,424 | Fair |
| Route 7 Bypass over Berlin Turnpike Rte. 287 | 1987 | 58,424 | Fair |
| Route 7 Bypass over Trib.s.fork Catoctin Ck. | 1980 | 57,955 | Good |
| Rte. 7 Bypass Wbl over Hamilton Station Road | 1980 | 57,955 | Fair |
| D. Greenway Ramp I over Sully Road Sbl (rte. 28) | 1995 | 47,273 | Fair |
| Ramp H-nb Sully Rd over Rte. 28 Sbl & Rte. 625 | 2005 | 44,269 | Fair |
| Route 7 Ramp A over RTEs 7&15 RAMPS C;D;E&G | 1997 | 39,918 | Fair |
| Route 7 Bypass Wbl over Rte 7 Business | 1990 | 38,567 | Fair |
| Route 7 Bypass over South Fork Catoctin Ck. | 1987 | 38,567 | Fair |
| Route 7 Bypass over South Fork Catoctin Ck. | 1987 | 38,567 | Fair |
| Harry Byrd Hwy Ebl over RTE.1582 Algonkian Pkwy | 1999 | 37,893 | Good |
| Harry Byrd Hwy WB over RTE.1582 Algonkian Pkwy | 2002 | 37,893 | Good |
| Dulles Greenway over Indian Creek | 1995 | 36,985 | Fair |
| Ramp A of Route 28 over Broad Run | 1991 | 36,769 | Fair |
| Ramp A of Rte. 28 over Ramp D of Route 7 | 1991 | 36,769 | Fair |
| Ramp A over Rte. 7 over Route 7 | 1990 | 36,769 | Fair |
| Old Ox Rd. 606 over Sully Rd. RTE.28 | 2004 | 35,147 | Fair |
| Route 606 over Cabin Branch | 2017 | 35,050 | Good |
| Dulles Greenway over Trib. Broad Run | 1995 | 34,401 | Fair |
| Harry Byrd Hwy WB over Airmont Rd. 719 | 1990 | 34,399 | Fair |
| RTE.7 By Pass over Sleeter Lake | 1990 | 34,399 | Fair |
| Old Ox Road over Dulles Greenway-rte.267 | 1995 | 32,235 | Fair |
| Old Ox Road over Indian Creek | 1994 | 32,235 | Fair |
| Dulles Greenway EB over Ebl 267 Cd; Ramp B; Daar | 1995 | 31,312 | Fair |
| Dulles Greenway EB over Sully Road (route 28) | 1995 | 31,312 | Fair |
| Ramp H of D.grnway over Dulles Greenway & Ramp G | 1995 | 31,312 | Fair |
| Waxpool Rd Eb&wb over Broad Run | 2004 | 30,740 | Good |
| Dulles Greenway over Trib. Beaverdam Run | 1995 | 30,365 | Fair |
| Dulles Greenway over Trib. Beaverdam Run | 1995 | 30,365 | Good |
| Harry Byrd Hwy. EB over Rte 15 - King Street | 1976 | 30,124 | Fair |
| Harry Byrd Hwy. WB over Rte 15 King Street | 1976 | 30,124 | Fair |
| Ramp D From Rt 7WB over Route 7 | 1990 | 29,645 | Good |
| Route 607 over Trib of Broad Run | 1998 | 29,584 | Fair |
| Route 7 Bp;ebl over Ivandale Road & Rte 709 | 1995 | 29,212 | Good |
| Rte. 7 Bypass EB over Hamilton Station Road | 1994 | 28,977 | Good |
| S. King Street over Tuscarora Creek | 1952 | 28,126 | Fair |
| Route 7_BYPASS over Simpsons Creek | 1990 | 27,955 | Fair |
| Farmwell Road over Trib of Beaverdam Run | 1989 | 27,924 | Fair |
| Dulles Greenway over Trib. Beaverdam Run | 1995 | 26,819 | Fair |
| Dulles Greenway over Trib. of Sycolin Creek | 1995 | 26,706 | Fair |
| Cascades Parkway over Trib. Cabin Branch | 1994 | 26,148 | Good |
| RTE.7 Bypass Ebl over Tuscarora Ck.&hike-bike | 1972 | 26,102 | Fair |
| Rte. 7 Wbl over Tuscarora Ck.&hike-bike | 1972 | 26,102 | Good |
| James Madison Hwy over Limestone Branch | 1989 | 25,827 | Good |
| Atlantic Blvd over Trib. of Broad Run | 1998 | 25,627 | Fair |
| Sterling Blvd. over Indian Creek | 2006 | 25,254 | Fair |
| Sterling Blvd. over RTE.28 Sully Rd. | 2006 | 25,254 | Good |
| Sterling Boulevard over Indian Creek | 1961 | 25,254 | Fair |
| Jefferson Pike over Piney Run | 1932 | 25,063 | Fair |
| US 340 over Potomac River & CSX Rwy | 1946 | 25,063 | Fair |
| Charlestown Pike over Rte. 7 Bypass | 1980 | 24,835 | Fair |
| Dtre-ramps A&d over Rte. 7/15 Bypass | 1995 | 24,713 | Fair |
| Cascades Parkway over Harry Byrd Hwy; Route 7 | 1990 | 23,336 | Fair |
| Church Road over Branch of Cabin Creek | 1996 | 22,669 | Good |
| Church Road over Cabin Branch | 1996 | 22,669 | Good |
| Church Road over W&od Hike & Bike Trail | 2006 | 22,669 | Good |
| Ramp "S" over Horsepen Run | 2007 | 22,000 | Fair |
| Ramp "p" over Horsepen Run | 2007 | 22,000 | Good |
| Ramp "p" over Ramps "r" and "S" | 2007 | 22,000 | Good |
| Ramp "q" over Horsepen Run | 2007 | 22,000 | Fair |
| James Monroe Hwy over Potomac Rvr; CSX; C&o | 1939 | 20,831 | Fair |
| John S. Mosby Hwy over Lenah Run | 1935 | 19,730 | Fair |
| Dulles Greenway EB over Broad Run | 1995 | 19,633 | Fair |
| James Madison Hiwy over Clarks Run | 1987 | 19,599 | Fair |
| Algonkian Parkway over Sugarland Run | 1990 | 19,332 | Good |
| RTE.7 Bypass Ebl over South Fork Catoctin Ck. | 1995 | 19,283 | Good |
| RTE.7 Bypass Ebl over South Fork Catoctin Ck. | 1995 | 19,283 | Good |
| Route 7 Bp; Ebl over Berlin Tpke; Route 287 | 1995 | 19,283 | Good |
| Route 7 Bypass Ebl over Route 7 Business | 1995 | 19,283 | Good |
| Dulles Greenway WB over Broad Run | 1995 | 18,794 | Fair |
| Charles Twn Pk Rmp over W & Od Trail | 2015 | 18,000 | Good |
| Ashburn Farm Pkwy. over Beaver Dam Run | 1992 | 17,896 | Good |
| Ashburn Vill. Blvd over Beaverdam Run | 1991 | 17,703 | Fair |
| Claiborne Pkwy over Trib. of Beaverdam Run | 1992 | 17,677 | Fair |
| Claiborne Pkwy. over Trib. of Beaverdam Run | 1992 | 17,677 | Fair |
| Arcola Mills Drive over Trib Broad Run | 2024 | 17,632 | Good |
| Catoctin Circle over Town Branch | 1979 | 17,441 | Good |
| Charlestown Pike over N. F. of Catoctin Creek | 1993 | 17,429 | Fair |
| Harry Byrd Highway over Airmont Road - 719 | 1995 | 17,199 | Good |
| Algonkian Parkway over Tributary Sugarland_run | 1992 | 16,940 | Fair |
| Belmont Ridge Road over Dulles Greenway & Ramp D | 1995 | 16,679 | Good |
| Evergreen Mills Rd over Broad Run | 1971 | 16,665 | Fair |
| Battlefield Pkwy over East Market Street | 2021 | 16,616 | Good |
| Battlefield Pkwy over Trib of Tuscaroa Creek_ | 2009 | 16,616 | Good |
| Battlefield Pkwy. over Dulles Greenway | 2007 | 16,616 | Fair |
| Charlestown Pike over South Fork Catoctin Ck. | 1937 | 16,525 | Fair |
| Ashburn Vill. Blv over Dulles Greenway | 1994 | 16,326 | Good |
| Market ST.E.(7EBL) over Route 15 Bypass | 1972 | 15,732 | Fair |
| Market ST.E.(7WBL) over Route 15 Bypass | 1972 | 15,732 | Fair |
| Dulles Greenway EB over Broadlands Blvd. | 1995 | 15,406 | Fair |
| Dulles Greenway EB over Claiborne Parkway | 1995 | 15,406 | Fair |
| Old Ox Rd. NB over Emergency Spillway | 2017 | 15,172 | Good |
| Old Ox Rd. SB over Emergency spillway | 2017 | 15,172 | Good |
| Loudoun Co. Pkwy. over Dulles Greenway | 1995 | 15,113 | Fair |
| Loudoun County Pkw over Tributary of Broad Run | 2006 | 15,113 | Good |
| Loudoun County Pkw over Tributary of Broad Run | 2006 | 15,113 | Good |
| Dulles Greenway WB over Broadlands Blvd. | 1995 | 14,959 | Fair |
| Dulles Greenway WB over Claiborne Parkway | 1995 | 14,959 | Fair |
| Loudoun Co. Pkwy over Trib. of Elklick Run | 1999 | 14,544 | Good |
| Loudoun Co. Pkwy over Trib. of Elklick Run | 2005 | 14,544 | Good |
| Tall Cedars Pkwy. over Trib. of Elklick Run | 1999 | 14,539 | Good |
| Loudoun Co. Pkwy. over Trib of Broad Run | 2009 | 14,503 | Good |
| Loudoun Co. Pkwy. over Trib. of Broad Run | 2006 | 14,503 | Good |
| Loudoun Co. Pkwy. over Trib. of Broad Run | 2009 | 14,503 | Good |
| Cascades Parkway over Lake Overflow | 1991 | 14,450 | Fair |
| Ryan Road over Trib. of Broad Run | 2000 | 14,231 | Good |
| Ryan Road over Trib. of Broad Run | 2000 | 14,231 | Good |
| James Monroe Hwy over Sycolin Creek | 1969 | 14,218 | Fair |
| Ashburn Vill Blvd over Trib of Russell Branch | 2017 | 14,212 | Good |
| Ashburn Vill.blvd. over Russell Branch | 1992 | 14,212 | Good |
| Ashburn Village Bd over Ebl & Wbl Leesburg Pike | 2017 | 14,212 | Good |
| WB Dulles Greenway over Goose Creek | 1995 | 14,193 | Fair |
| WB Dulles Greenway over Sycolin Creek | 1995 | 14,193 | Fair |
| Palisade Pkwy over Lake Overflow | 1991 | 14,152 | Fair |
| Riverside Pkwy. over Goose Creek | 2002 | 14,071 | Fair |
| Algonkian Parkway over Trib.of Potomac River | 1985 | 13,907 | Good |
| Dulles Greenway EB over Goose Creek | 1995 | 13,639 | Fair |
| EB Dulles Greenway over Sycolin Creek | 1995 | 13,639 | Fair |
| RTE.7 Conn. Ramp over Rte 7 HARRY BYRD HWY. | 1976 | 13,591 | Fair |
| WB Dulles Greenway over Trib. of Sycolin Creek | 1994 | 13,553 | Fair |
| Gum Springs Road over Bull Run | 1968 | 13,468 | Fair |
| Belmont Ridge Rd over Trib of Beaverdam Run | 2023 | 13,228 | Good |
| EB Dulles Greenway over Trib. of Sycolin Creek | 1994 | 13,153 | Good |
| Claiborne Parkway over Trib. of Beaverdam Run | 2000 | 13,117 | Good |
| Claiborne Parkway over Trib. of Beaverdam Run | 2000 | 13,117 | Good |
| EB Diaah over Horsepen Run | 1960 | 13,000 | Fair |
| Old EB Airport Roa over Horsepen Run | 2007 | 13,000 | Good |
| Ramp "r" over Va Route 28 | 1994 | 13,000 | Good |
| Saarinen Circle over Commercial Vehicle Drive | 1993 | 13,000 | Fair |
| Saarinen Circle over Commercial Vehicle Drive | 1993 | 13,000 | Good |
| WB Diaah Entrance over Horsepen Run | 1997 | 13,000 | Fair |
| WB Diaah over Horsepen Run | 1960 | 13,000 | Fair |
| Braddock Rd. over Tributary of Elklick Run | 2006 | 12,710 | Good |
| Braddock Road over Elk Lick Run | 2002 | 12,710 | Good |
| Gum Springs Road over Quarry Tunnel | 2012 | 12,604 | Good |
| Pacific Blvd. over Indian Creek | 2008 | 12,561 | Good |
| Pacific Boulevard over Tributary of Broad Run | 1993 | 12,561 | Fair |
| Algonkian Parkway over Trib. Potomac River | 1992 | 12,096 | Fair |
| Charlestown Pike over Trib.of N.fork Catoctin | 1933 | 12,017 | Fair |
| Road "a" Extension over Diaah and Metrorail | 1989 | 12,000 | Fair |
| James Monroe Hiway over Little River | 1990 | 11,750 | Fair |
| James Monroe Hwy. over Goose Creek | 1987 | 11,750 | Fair |
| Belmont Ridge Road over Cain Branch | 2013 | 11,562 | Good |
| Belmont Ridge Road over North Fork Broad Run | 1971 | 11,562 | Fair |
| Belmont Ridge Road over Route 7 | 2017 | 11,562 | Good |
| River Creek Pkwy. over Leesburg Pike | 2008 | 11,434 | Good |
| Sycolin Road over Dulles Greenway-rte.267 | 1995 | 11,403 | Fair |
| Sycolin Road over Goose Creek | 1969 | 11,403 | Fair |
| Sycolin Road over Rte. 267-dulles Greenway | 1994 | 11,403 | Fair |
| South Riding Blvd. over Trib. of Elklick Run | 1997 | 11,230 | Good |
| Berlin Turnpike over North Fork Catoctin Ck. | 1938 | 11,147 | Fair |
| Berlin Turnpike over Richard Creek | 1938 | 11,147 | Fair |
| Berlin Turnpike over Trib. Brens Creek | 1938 | 11,147 | Fair |
| River Creek Pkwy over Cattail Branch | 1997 | 11,120 | Fair |
| River Creek Pkwy. over Tributary of Cattail Br. | 1997 | 11,120 | Fair |
| Pacific Blvd over Cabin Branch | 2010 | 11,101 | Fair |
| Ramp From 773 over Gas Utilities | 2008 | 10,989 | Good |
| Rte.3171 over Wetlands | 2004 | 10,638 | Good |
| Battlefield Pkwy over Trib. of Cattail Branch | 2011 | 10,608 | Good |
| Battlefield Pkwy. over Cattail Branch | 2005 | 10,608 | Good |
| Evergreen Mills Rd over Sycoline Creek | 1973 | 10,362 | Good |
| Evergreen Mills Rd over Goose Creek | 1973 | 10,102 | Fair |
| Aviation Drive over Diaah | 1961 | 10,000 | Fair |
| Old Eastbound Exit over Horsepen Run | 1960 | 10,000 | Fair |
| Saarinen Circle over Toll Plaza | 1961 | 10,000 | Fair |
| John S Mosby Hiwy over South Fork Broad Run | 1974 | 9,865 | Good |
| Hirst Road over South Fork Catoctin Ck. | 1987 | 9,753 | Fair |
| Ashburn Farm Pkwy over Trib. of Beaver Dam Run | 1996 | 9,660 | Good |
| Waxpool Road over Beaverdam Run | 2003 | 9,597 | Good |
| Waxpool Road over Dulles Greenway | 1994 | 9,597 | Fair |
| Augusta Drive over Trib. Sugarland Run | 2000 | 9,497 | Good |
| Belmont Ridge Rd over TRIB of GOOSE CREEK | 2017 | 9,295 | Good |
| Woodland Rd over Storm Water Pond | 1993 | 9,225 | Fair |
| John Mosby Hwy. over Mill Race | 1929 | 9,058 | Fair |
| John S. Mosby Hwy. over Little River | 1824 | 9,058 | Fair |
| Ashburn Vill. NB over W&od Hike & Bike Trail | 1991 | 8,851 | Fair |
| Ashburn Vill. SB over W&od Hike & Bike Trail | 1991 | 8,851 | Fair |
| Battlefld Pkwy. EB over Tuscarora Creek | 2009 | 8,308 | Good |
| Battlefld Pkwy. WB over Tuscarora Creek | 2009 | 8,308 | Good |
| Belmont Ridge Rd over W&od Trail | 2018 | 8,050 | Good |
| Ryan Road over Trib of Beaverdam Creek | 2021 | 8,031 | Good |
| Demott Drive over Trib. of Beaverdam Run | 2005 | 8,000 | Good |
| Creighton Road over Trib of Broad Run | 2013 | 7,952 | Good |
| Plaza Street over Tuscarora Creek | 1996 | 7,895 | Good |
| Plaza Street over W & Od Hike & Bike Trail | 1996 | 7,895 | Good |
| Sycolin Road over Rte.7 & 15 bypass | 2014 | 7,895 | Good |
| Pleasant Valley Rd over Sand Branch | 1965 | 7,750 | Fair |
| Ramp-cascades Pkwy over Lake Inlet | 1991 | 7,708 | Fair |
| Claiborne Pkwy. NB over RTE.7 Leesburg Pike | 2005 | 7,632 | Good |
| Claiborne Pkwy. SB over RTE.7 Leesburg Pike | 2005 | 7,632 | Good |
| Berlin Turnpike over Trib. of Potomac River | 1932 | 7,454 | Fair |
| Route 287 over Potomac Rvr;csx & Mun | 1953 | 7,454 | Fair |
| Sycolin Road over Sycolin Creek | 1988 | 7,291 | Fair |
| John S. Mosby Hiwy over Trib. of Panther Skin Ck | 1954 | 7,163 | Fair |
| John S. Mosby Hwy. over Goose Creek | 1954 | 7,163 | Fair |
| King St & RT15 Bus over Original Town Branch | 1932 | 6,675 | Good |
| King St. RT.15 Bus over Town Branch | 1980 | 6,675 | Good |
| 620 Braddock Rd. over Foley Branch | 2006 | 6,669 | Fair |
| Braddock Rd. over Trib of Bull Run | 2008 | 6,669 | Good |
| Broadlands Blvd. over Trib. of Beaverdam Run | 2001 | 6,591 | Good |
| Gloucester Pkwy over Beaverdam Run | 2008 | 6,428 | Good |
| Gloucester Pkwy over Broad Run | 2016 | 6,428 | Good |
| Gloucester Pkwy over Broad Run | 2016 | 6,428 | Good |
| Gloucester Pkwy. over Bearverdam Run | 2008 | 6,428 | Good |
| Nokes Blvd.__wbl over RTE.28 Sully Rd. | 2008 | 6,428 | Good |
| Nokes Blvd__ebl over RTE.28 Sully Rd. | 2009 | 6,428 | Good |
| Berlin Turnpike over Milltown Creek | 1942 | 6,399 | Fair |
| Shellhorn Rd. over Beaverdam Run | 2008 | 6,278 | Good |
| Evergreen Mills Rd over North Fork of Broad Run | 1973 | 6,212 | Fair |
| Berlin Turnpike over S. F. Catoctin Creek | 1970 | 6,130 | Fair |
| Ashburn Road over Beaverdam Run | 1959 | 6,010 | Fair |
| Ramp C of Route 7 over Tributary of Broad Run | 1990 | 6,000 | Good |
| Russel Branch Pkwy over Trib of Russel Branch | 2016 | 5,810 | Good |
| Hillsboro Road over Route 7 Bypass | 1987 | 5,592 | Good |
| Croson Lane over Br. of Beaverdam Run | 2007 | 5,566 | Good |
| Pacific Blvd. NB over W & Od Trail | 2010 | 5,550 | Good |
| Pacific Blvd. SB over W & Od Trail | 2010 | 5,550 | Good |
| Old Ryan Road over Stream | 2017 | 5,500 | Good |
| City Center Blvd. over Trib of Board Run | 1998 | 5,321 | Good |
| Silcott Springs Rd over North Fork Goose Creek | 1932 | 5,247 | Fair |
| Relocation Drive over Indian Creek | 1987 | 5,180 | Good |
| Loudoun St East over Trib.of Sleeter Lake | 1999 | 5,112 | Fair |
| Sycolin Rd. over Trib. of Tuscarora Ck. | 2014 | 5,112 | Good |
| Riding Center Dr. over Trib. of Elklick Run | 2005 | 5,110 | Good |
| Ashburn Village Bl over Trib.of Broad Run | 1997 | 5,000 | Good |
| North Access Satel over Creek | 1989 | 5,000 | Fair |
| South Access Satel over Creek | 1989 | 5,000 | Fair |
| Clarkes Gap Rd over Br.of Catoctin Creek | 1969 | 4,648 | Fair |
| Hatcher Ave. over S Fork Catactin Creek | 1987 | 4,589 | Good |
| Purcellville Road over Route 7 Bypass | 1987 | 4,589 | Fair |
| Tripleseven Road over Trib.of Potomac River | 1997 | 4,581 | Good |
| Hillsboro Road over North Fork Catoctin Ck. | 1955 | 4,500 | Fair |
| Innovation Dr. over RTE.28 Sully Rd. | 2012 | 4,428 | Good |
| Edgewater Street over Trib. Elklick Run | 1996 | 4,365 | Fair |
| Dry Mill Road over Dry Mill Branch | 1985 | 4,226 | Fair |
| James Monroe NB over Dry Run | 1966 | 4,160 | Fair |
| Cochran Mill Road over Tuscarora Creek | 2019 | 4,126 | Good |
| Belmont Ridge Rd. over W. & Od Trail | 2017 | 4,025 | Good |
| Harrison Street over Tuscarora Creek | 1964 | 4,000 | Fair |
| Edgewater Drive over Trib. of Elklick Run | 2000 | 3,828 | Good |
| Edgewater St. over Trib. of Elklick Run | 2000 | 3,828 | Good |
| Airmont Road over Simpsons Creek | 1989 | 3,827 | Good |
| Stone Spring Blvd. over Trib of Broad Run | 2014 | 3,793 | Good |
| Hillsboro Road over S. F. of Catoctin Creek | 1970 | 3,791 | Fair |
| Woodbridge Pkwy. over Trib. of Potomac River | 1990 | 3,754 | Fair |
| Hay Road over Trib of Beaverdam Run | 1965 | 3,597 | Good |
| Hay Road over Trib. Beaverdam Run | 1997 | 3,597 | Fair |
| James Monroe SB over Dry Run | 1957 | 3,547 | Fair |
| Bull Run P.O. Road over Trib. Elklick Run | 2011 | 3,478 | Good |
| Milltown Road over Branch of Catoctin Creek | 1970 | 3,476 | Good |
| Milltown Road over N. F. of Catoctin Creek | 1970 | 3,476 | Fair |
| Ridgeway Dr. over Trib. of Beaverdam Run | 2001 | 3,468 | Good |
| Saint Louis Road over Goose Creek | 1969 | 3,423 | Fair |
| River Bank Street over Trib. of Sugarland Run | 2000 | 3,297 | Good |
| Russel Branch Pkwy over Trib of Broad Run | 2008 | 2,850 | Good |
| Russle Branch Pkwy over Trib of Broad Run | 2008 | 2,850 | Good |
| Exchange Street over Russell Branch | 2008 | 2,762 | Good |
| Hamilton Sta. Road over Br S Fork Catoctin Creek | 1930 | 2,748 | Fair |
| Saint Louis Road over N/f Beaverdam Creek | 1961 | 2,699 | Fair |
| Marblehead Drive over Trib. of Beaverdam Run | 2012 | 2,698 | Good |
| Saint Louis Rd. over Beaverdam Creek | 1932 | 2,578 | Fair |
| Dry Mill Road over Route 7 Bypass | 1976 | 2,501 | Fair |
| Elklick Road over Elk Lick Run | 2002 | 2,422 | Fair |
| Shreve Mill Road over Dulles Greenway | 1995 | 2,320 | Good |
| Old Wheatland Road over South Fork Catoctin Ck. | 1955 | 2,208 | Fair |
| Claiborne Pkwy over Trib. of Broad Run | 2018 | 2,166 | Good |
| Summerall Dr. over Trib. of Elklick Run | 2007 | 2,122 | Good |
| Harpers Ferry Road over Piney Run | 1947 | 2,114 | Fair |
| Allder School Road over Trib. of Sf Catoctin Ck. | 2018 | 2,086 | Good |
| Innovation Drive over Trib. Horsepen Run | 2000 | 2,086 | Good |
| Snickersville Road over Beaverdam Creek | 1820 | 2,060 | Good |
| Gate 14 Access Rd. over Dulles Greenway | 1995 | 2,000 | Good |
| Meade Dr. over Trib.of Tuscarora Creek | 2000 | 2,000 | Good |
| Ramp A From RTE.28 over Indian Creek | 2006 | 2,000 | Good |
| South Street over Trib.of Town Branch | 1975 | 2,000 | Good |
| Milltown Road over Milltown Creek | 1970 | 1,957 | Fair |
| Irish Corner Road over Branch of Dutchmans Ck. | 1932 | 1,932 | Fair |
| Irish Corner Road over Dutchman Creek | 1975 | 1,932 | Good |
| Snickersville Rd. over Goose Creek | 1958 | 1,931 | Fair |
| Greenway Drive over Trib. Upper Tuscarora Ck | 1994 | 1,920 | Good |
| Gleedsville Rd. over Sycolin Creek | 2012 | 1,908 | Good |
| Atlantic Blvd. over Cabin Branch | 1990 | 1,900 | Good |
| Rte.659 Northstar over Wetlands | 2004 | 1,800 | Good |
| Snickersville Rd. over Br Beaverdam Creek | 1966 | 1,800 | Fair |
| Paramount Place over Trib of Cub Run | 2004 | 1,776 | Fair |
| Dry Mill Road over Town Branch | 1992 | 1,763 | Good |
| Snickersville Road over Tributary of Goose Creek | 1993 | 1,754 | Good |
| Center Street over Trib. of Elklick Run | 1999 | 1,699 | Good |
| Thomas Avenue over Sugarland Run | 1970 | 1,687 | Poor |
| Snickersville Tnpk over North Fork Beaverdam Ck. | 1915 | 1,643 | Fair |
| Ramp "g" over Diaah and Metrorail | 1996 | 1,500 | Good |
| Ramp "g" over Horsepen Run | 1995 | 1,500 | Good |
| Woods Edge Dr. over Trib.of Cattail Branch | 2005 | 1,500 | Good |
| Lovettsville Road over Catoctin Creek | 1965 | 1,460 | Fair |
| Planting Field Dr over Trib. Elklick Run | 2000 | 1,429 | Fair |
| Destiny Dr. over Trib Elklick Run | 2005 | 1,378 | Good |
| Old Ryan Road over Trib of Beaverdam Run | 2009 | 1,374 | Good |
| Hope Pkwy. over Trib.of Upper Tuscarora | 2006 | 1,360 | Good |
| Cedar Ridge Blvd. over Trib of Bull Run | 2005 | 1,312 | Good |
| Dry Mill Road over Dry Mill Branch | 1985 | 1,247 | Good |
| Dry Mill Road over Wash. Old Dom. Reg. Trl. | 1892 | 1,247 | Fair |
| Hillsboro Hunt Dr. over Trib.of Broad Run | 2002 | 1,223 | Good |
| Lime Kiln Rd. over Tributary Goose Creek | 1989 | 1,169 | Fair |
| Lincoln Rd. over North Fork Goose Creek | 1968 | 1,075 | Fair |
| Lincoln Road over Trib. of N.fork Goose CR | 1967 | 1,075 | Good |
| Center Street over Trib. of Elklick Run | 1997 | 1,074 | Fair |
| Mink Meadow Street over Trib. Elklick Run | 1999 | 1,039 | Good |
| Belcourt Castle Dr over Trib. of Elklick Run | 2006 | 1,020 | Good |
| Atlantic Blvd over W&OD Trail & Ruritan Rd | 2011 | 1,000 | Good |
| Founders Dr. over North Fork Broad Run | 2011 | 1,000 | Good |
| Garriland Road over Trib to Limestone Branch | 2007 | 1,000 | Good |
| Ramp "g" over Economy Parking Connecto | 1992 | 1,000 | Good |
| Ramp F From RTE.28 over Indian Creek | 2006 | 1,000 | Good |
| Ramp G of D.grnway over Dulles Greenway | 1995 | 1,000 | Fair |
| Winning Glory Dr. over Foley Branch | 2016 | 1,000 | Good |
| Zion Chapel Dr. over Tributary of Broad Run | 2008 | 1,000 | Good |
| Airmont Road over Butchers Creek | 1942 | 971 | Fair |
| Taylorstown Road over Catoctin Creek | 1970 | 918 | Fair |
| Russel Branch Pkwy over Broad Run | 2016 | 864 | Good |
| Raspberry Drive over Trib. Limestone Branch | 1993 | 816 | Good |
| Blossum Drive over Cabin Branch | 1997 | 800 | Good |
| Loudoun Reserve Dr over Trib.of Broad Run | 2006 | 800 | Good |
| Willisville Road over Panther Skin Creek | 1957 | 793 | Fair |
| Foxcroft Road over Goose Creek | 1972 | 738 | Fair |
| Foxcroft Road over Tributary of Goose Creek | 1972 | 738 | Fair |
| Foxcroft Road over Tributary of Goose Creek | 1972 | 738 | Fair |
| Auburn Farm Rd over Bull Run | 1966 | 731 | Fair |
| Lime Kiln Road over North Fork Goose Creek | 1965 | 717 | Fair |
| Hyland Hills St. over Trib.of Elklick Run | 1999 | 712 | Good |
| Golf View Drive over Trib. Elklick Run | 2000 | 672 | Good |
| Saint Clair Lane over Clarks Run | 1977 | 664 | Fair |
| Nations Drive over Elklick Run | 2004 | 649 | Good |
| Dulles Center Blvd over Trib. of Broad Run | 1999 | 643 | Fair |
| New Road over Bull Run | 1993 | 621 | Poor |
| Mandolin Street over Trib of Elklick Run | 2005 | 619 | Fair |
| Forest Manor Dr. over Trib.of Broad Run | 2000 | 601 | Fair |
| East A Street over Unknown Waterway | 2012 | 600 | Good |
| Locust Grove Drive over S.Fork of Catoctin Creek | 2012 | 600 | Good |
| Airmont Road over S Fork Beaverdam Creek | 1962 | 552 | Fair |
| Mc Pherson Circle over Trib.of Potomac River | 1987 | 542 | Fair |
| Crossfield Dr. over Trib.of Elklick Run | 2005 | 509 | Good |
| Avonlea Drive over Trib. of Elklick Run | 2011 | 500 | Good |
| Bloomfield Path over Lenah Run | 2014 | 500 | Good |
| Centergate Drive over Trib of Broad Run | 2008 | 500 | Good |
| Grassland Grove over Lenah Run | 2015 | 500 | Good |
| Ivybridge La. over Trib of Sycolin Creek | 2004 | 500 | Good |
| Trailhead Drive over S.Fork Broad Run | 2013 | 500 | Good |
| Trailhead Drive over S.Fork Broad Run | 2013 | 500 | Good |
| Valleybrook La. over Trib of Sycolin Creek | 2004 | 500 | Good |
| Trappe Road over Trib. Panther Skin Creek | 1925 | 499 | Fair |
| Donegal Drive over Branch of Elklick Run | 2003 | 486 | Good |
| Donegal Drive over Branch of Elklick Run | 2004 | 486 | Good |
| Stony Point Rd. over N Fork Catoctin Creek | 1977 | 420 | Fair |
| Stony Point Road over North Fork Catoctin Ck. | 1965 | 420 | Fair |
| Purcellville Road over North Fork of Catoctin C | 1976 | 400 | Fair |
| Montresor Rd. over Trib of Limestone Branch | 2011 | 370 | Good |
| Foxcroft Road over Beaverdam Creek | 1925 | 363 | Fair |
| Bankfield Dr. over Trib of Catoctin Creek | 2003 | 330 | Good |
| Childrens Center R over Route 7 Bypass | 1976 | 325 | Good |
| Allder School Road over South Fork Catoctin Ck. | 2018 | 313 | Good |
| Telegraph Sprgs Rd over N. Fork Goose Creek | 1957 | 307 | Fair |
| Mt. Gilead Road over Sycolin Creek | 1932 | 303 | Fair |
| Barbaras Bluff Ct. over Trib of Catoctin Creek | 2008 | 300 | Good |
| Berkhamstead Drive over Trib of Limestone Branch | 2015 | 300 | Good |
| Davis Drive over Trib of Indian Creek | 1990 | 300 | Good |
| Deer Meadow Path over Trib.of Tuscarora Creek | 2000 | 300 | Good |
| W.T. Druhan Blvd. over Trib of Crooked run | 2012 | 300 | Good |
| Allder School Road over South Fork Catoctin Ck | 2016 | 291 | Good |
| Bettis Drive over Br. of Catoctin Creek | 2007 | 279 | Good |
| Creamer Lane over N Fork Catoctin Creek | 2023 | 263 | Good |
| Newberry Crossing over Trib of Sleeter Lake | 2006 | 252 | Good |
| Greenleaf Place over Trib of Simpsons Creek | 2006 | 247 | Good |
| Browns Creek Pl. over Tirb. of Big Branch | 2005 | 234 | Good |
| Gaver Mill Road over North Fork Catoctin Ck. | 1977 | 228 | Fair |
| Hughesville Rd. over Crooked Run | 1932 | 215 | Fair |
| Sassafras Road over Simpsons Creek | 1994 | 214 | Fair |
| Limestone School R over Tributary Limestone Br. | 1917 | 211 | Fair |
| Limestone School R over Tributary of Potomac Rv. | 1996 | 211 | Good |
| Conservancy Dr. over Trib of Beaverdam Creek | 2012 | 200 | Good |
| Lennox Hale Drive over Trib of Foley Branch | 2013 | 200 | Good |
| Maplehurst Drive over Trib of Lenah Run | 2017 | 200 | Good |
| Mill Wheel Place over Lenah Run | 2015 | 200 | Good |
| Wright Farm Drive over South Fork Catoctin | 2012 | 200 | Good |
| Davis Court over Tuscarora Creek | 1971 | 195 | Poor |
| Hampton Rd. over Catoctin Creek | 1978 | 181 | Good |
| Telegraph Spring over Trib.of Goose Creek | 1998 | 175 | Good |
| Innisbrook Circle over Trib. of Jacks Run | 1989 | 174 | Fair |
| Shelburn Glebe Rd. over North Fork Goose Creek | 2004 | 174 | Good |
| Maple Cross Street over Trib. of Elklick Run | 1999 | 165 | Good |
| Franklin Ford Pl. over Trib.of North Fork Goose | 2005 | 163 | Good |
| Loudoun Co. Pkwy. over North Fork of Russell Br | 2006 | 149 | Good |
| Loudoun Co. Pkwy. over Tributary of Russell Br. | 1990 | 149 | Fair |
| Loudoun County Pkw over Rte. 7 | 2010 | 149 | Good |
| Piggott Bottom Rd. over Trib of Catoctin Creek | 2023 | 144 | Good |
| Champe Ford Road over Little River | 1908 | 140 | Fair |
| Yellow Schoolhouse over Branch of Beaverdam Ck. | 1974 | 125 | Fair |
| Simpsons Creek Rd. over Simpsons Creek | 1930 | 122 | Fair |
| Lutheran Church Rd over Trib Milltown Creek | 2017 | 120 | Good |
| Bell Road over Route 7 Bypass | 1987 | 116 | Fair |
| Yellow Schoolhouse over N. F. Beaverdam Creek | 1976 | 115 | Fair |
| Heaters Island Ct. over Trib. of Limestone Br. | 2007 | 110 | Good |
| Ash George Road over Richards Creek | 1932 | 107 | Fair |
| Nautical Jive Dr. over Trib. of Potomac River | 2006 | 105 | Good |
| Snake Hill Road over Tributary of Goose Creek | 1972 | 104 | Fair |
| Courtland Vill. Dr over Trib. of Big Branch | 2005 | 100 | Good |
| Success Drive over Foley Branch | 2013 | 100 | Good |
| Greggsville Rd. over Trib. North Fork Creek. | 1959 | 99 | Fair |
| Aldie Dam Road over Little River | 1989 | 96 | Good |
| Forest Mills Road over Trib of Crooked Run | 2017 | 93 | Good |
| Tail Race Road over Trib. of Little River | 1974 | 85 | Good |
| Dutchmans Creek Rd over Dutchmans Creek | 2022 | 80 | Good |
| Greengarden Road over Jeffries Branch | 1932 | 78 | Fair |
| Greengarden Road over Panther Skin Creek | 1916 | 78 | Fair |
| Loudoun Co. Pkwy over Beaverdam Run | 2006 | 74 | Good |
| Loudoun Co. Pkwy. over Beaverdam Run | 2006 | 74 | Good |
| Equine Path Way over Trib of Bull Run | 2008 | 72 | Good |
| Woodtrail Road over North Fork Beaverdam Ck. | 1978 | 69 | Good |
| Sawmill Lane over Piney Run | 1964 | 68 | Fair |
| Canongate Drive over Trib. of Dry Mill Branch | 2003 | 60 | Good |
| Downey Mill Road over Br. of Catoctin Creek | 1971 | 59 | Fair |
| Paxson Road over North Fork Beaverdam Ck. | 1949 | 58 | Fair |
| Featherbed Lane over Br of Catoctin Creek | 1987 | 57 | Fair |
| Featherbed Lane over Catoctin Creek | 1925 | 57 | Good |
| Featherbed Lane over Milltown Creek | 1971 | 57 | Fair |
| Unison Road over Dog Branch | 1955 | 51 | Fair |
| Quaker Lane over Beaverdam Creek | 1915 | 48 | Fair |
| Farewell Dance Dr. over Trib. of Potomac River | 2006 | 47 | Good |
| Turneysville Road over Piney Branch | 1973 | 35 | Good |
| Arnold Lane over Piney Branch | 1932 | 30 | Good |