Recent District of Columbia Updates

May 30, 2017

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
May 30, 2017: Merged duplicate pages

May 29, 2017

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
May 29, 2017: HAER photos posted by Nathan Holth

Taft Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Connecticut Avenue
May 29, 2017: New photo from Nathan Holth

Duke Ellington Memorial Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Calvert Street
May 29, 2017: New photo from Nathan Holth

May 23, 2017

Pennsylvania Avenue Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Pennsylvania Avenue
May 23, 2017: Updated by Luke: Added builders from HAER

February 6, 2017

CSX - Potomac River Swing Bridge (Washington, District of Columbia)
Through truss and girder bridge over Potomac River on CSX Railroad
February 6, 2017: Updated by Alexander D. Mitchell IV: Additional history added

December 23, 2016

CSX - Anacostia River Bridge (Washington, District of Columbia)
Pony/through plate girder bridge over Anacostia River on Conrail/CSX RR
December 23, 2016: Photo imported by Alexander D. Mitchell IV

December 21, 2016

Calvert Street Bridge (Washington, District of Columbia)
Lost Deck truss bridge over Rock Creek on Calvert Street
December 21, 2016: Added by Dave King

Anacostia River Bridge (Old) (Washington, District of Columbia)
Lost Pratt Through truss bridge over Anacostia River in 11th Street
December 21, 2016: New photo from Douglas Butler

Anacostia River Bridge (Washington, District of Columbia)
Lost Deck plate girder bascule with steel arch approaches bridge over Anacoastia River on 11th Street
December 21, 2016: New photo from Douglas Butler

December 19, 2016

Piney Branch Parkway Bridge (Washington, District of Columbia)
Concrete arch bridge over Piney Branch Parkway on 16th Street NW
December 19, 2016: New photo from Dave King

Tidal Basin Bridge (Washington, District of Columbia)
Steel stringer bridge over Tidal Basin on Ohio Drive
December 19, 2016: New photo from Dave King

December 18, 2016

Anacostia River Bridge (Washington, District of Columbia)
Lost Deck plate girder bascule with steel arch approaches bridge over Anacoastia River on 11th Street
December 18, 2016: Updated by Luke: Added info

Anacostia River Bridge (Old) (Washington, District of Columbia)
Lost Pratt Through truss bridge over Anacostia River in 11th Street
December 18, 2016: Added by Dave King

Anacostia River Bridge (Washington, District of Columbia)
Lost Deck plate girder bascule with steel arch approaches bridge over Anacoastia River on 11th Street
December 18, 2016: New photo from Dave King

November 21, 2016

Memorial Avenue Bridge (Washington, District of Columbia)
Concrete arch bridge over GWMP (Southbound) on Memorial Avenue
November 21, 2016: New Street View added by Dana and Kay Klein

14th Street Bridge (Washington, District of Columbia)
Steel stringer bridge over Potomac River and Ohio Drive on Interstate 395 and US 1
November 21, 2016: New Street View added by Dana and Kay Klein

September 16, 2016

CSX - Potomac River Swing Bridge (Washington, District of Columbia)
Through truss and girder bridge over Potomac River on CSX Railroad
September 16, 2016: Updated by Christopher Finigan: Added categories "Pin-connected", "Riveted"

CSX - Potomac River Swing Bridge (Washington, District of Columbia)
Through truss and girder bridge over Potomac River on CSX Railroad
September 16, 2016: New Street View added by Dana and Kay Klein

September 6, 2016

CSX - Anacostia River Bridge (Washington, District of Columbia)
Pony/through plate girder bridge over Anacostia River on Conrail/CSX RR
September 6, 2016: New Street View added by Dana and Kay Klein

August 31, 2016

Highway Bridge (Washington, District of Columbia)
Lost Pratt through truss bridge over Potomac River on 14th Street/U.S. 1
August 31, 2016: New photo from Douglas Butler

August 30, 2016

Chain Bridge (Seventh) (Washington, District of Columbia)
Lost Whipple through truss bridge over Potomac River on Chain Bridge Road
August 30, 2016: Updated by Art Suckewer: Added Phoenix Columns per photo

Highway Bridge (Washington, District of Columbia)
Lost Pratt through truss bridge over Potomac River on 14th Street/U.S. 1
August 30, 2016: Updated by Alexander D. Mitchell IV: Photo and details from DC Dept. of Highways added

Chain Bridge (Seventh) (Washington, District of Columbia)
Lost Whipple through truss bridge over Potomac River on Chain Bridge Road
August 30, 2016: Updated by Tony Dillon: Added truss type

Chain Bridge (Eighth) (Washington, District of Columbia)
Haunched deck plate girder bridge over Potomac River and Chesapeake & Ohio Canal
August 30, 2016: New photo from Alexander D. Mitchell IV

Chain Bridge (Seventh) (Washington, District of Columbia)
Lost Whipple through truss bridge over Potomac River on Chain Bridge Road
August 30, 2016: New photo from Alexander D. Mitchell IV

August 4, 2016

Zoo Access Road Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Zoo Access Road
August 4, 2016: New Street View added by Dana and Kay Klein

US50 Overpass (Washington, District of Columbia)
Haunched Deck plate girder bridge over Gwmp (Sb) & Boundary Cha on Arlington Blvd (U.S. Route 50)
August 4, 2016: New Street View added by Dana and Kay Klein

Tidal Basin Bridge (Washington, District of Columbia)
Steel stringer bridge over Tidal Basin on Ohio Drive
August 4, 2016: New Street View added by Dana and Kay Klein

Three Sisters Bridge (Washington, District of Columbia)
Girder bridge over Potomac River
August 4, 2016: New Street View added by Dana and Kay Klein

C&O Canal Towpath Bridge (Washington, District of Columbia)
Pratt pony truss bridge over Chesapeake and Ohio Canal on a pedestrian trail
August 4, 2016: New Street View added by Dana and Kay Klein

July 26, 2016

Virginia Avenue Tunnel (Washington, District of Columbia)
Tunnel on CSX Transportation
July 26, 2016: Added by Andy Winegar

May 10, 2016

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
May 10, 2016: New photo from Nathan Holth

May 4, 2016

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
May 4, 2016: Updated by Nathan Holth: Nationally significant, unique bascule span to be DEMOLISHED AND REPLACED!!!!

March 28, 2016

C&O Canal Towpath Bridge (Washington, District of Columbia)
Pratt pony truss bridge over Chesapeake and Ohio Canal on a pedestrian trail
March 28, 2016: New Street View added by James McCray

C&O Canal Towpath Bridge (Washington, District of Columbia)
Pratt pony truss bridge over Chesapeake and Ohio Canal on a pedestrian trail
March 28, 2016: New Street View added by James McCray

C&O Canal Towpath Bridge (Washington, District of Columbia)
Pratt pony truss bridge over Chesapeake and Ohio Canal on a pedestrian trail
March 28, 2016: Added by James McCray

March 3, 2016

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
March 3, 2016: Updated by Alexander D. Mitchell IV: Planned repairs, proposed rehabilitation, news article link, history notes added

February 26, 2016

Aqueduct Bridge (3rd) (Washington, District of Columbia)
Lost Pratt deck truss bridge over Potomac River on Road/Electric Railroad
February 26, 2016: New photos from Luke

December 12, 2015

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
December 12, 2015: New Street View added by Douglas Butler

February 23, 2015

Manayunk Philadelphia & Reading Railroad Bridge (Washington, District of Columbia)
Howe pony truss bridge over Nothing (Exhibit) on Nothing (Exhibit)
February 23, 2015: Updated by Luke: Added category "Museum"

February 13, 2015

Manayunk Philadelphia & Reading Railroad Bridge (Washington, District of Columbia)
Howe pony truss bridge over Nothing (Exhibit) on Nothing (Exhibit)
February 13, 2015: Added by Nathan Holth

February 12, 2015

W&GF - Foundry Branch Bridge (Washington, District of Columbia)
Pratt deck truss bridge over Foundry Branch on The Washington and Great Falls Electric Railway
February 12, 2015: New photo from Alexander D. Mitchell IV

Highway Bridge (Washington, District of Columbia)
Lost Pratt through truss bridge over Potomac River on 14th Street/U.S. 1
February 12, 2015: Photos imported by Dave King

Pennsylvania Avenue Bridge (Old) (Washington, District of Columbia)
Lost Through truss bridge over Anacostia River on Pennsylvania Avenue
February 12, 2015: Added by Dave King

Three Sisters Bridge (Washington, District of Columbia)
Girder bridge over Potomac River
February 12, 2015: Added by Dave King

January 27, 2015

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
January 27, 2015: New video from Will Truax

January 26, 2015

Tidal Basin Bridge (Washington, District of Columbia)
Steel stringer bridge over Tidal Basin on Ohio Drive
January 26, 2015: Added by Dave King

January 7, 2015

US50 Overpass (Washington, District of Columbia)
Haunched Deck plate girder bridge over Gwmp (Sb) & Boundary Cha on Arlington Blvd (U.S. Route 50)
January 7, 2015: Added by Dave King

January 6, 2015

Humpback Bridge (Washington, District of Columbia)
Lost Ribbed closed-spandrel arch bridge over Boundary Channel on George Washington Memorial Parkway
January 6, 2015: HAER photos posted by Dave King

October 30, 2014

Anacostia River Bridge (Washington, District of Columbia)
Lost Deck plate girder bascule with steel arch approaches bridge over Anacoastia River on 11th Street
October 30, 2014: Added by Douglas Butler

Frederick Douglass Memorial Bridge (Washington, District of Columbia)
Bridge over Anacostia River on South Capitol Street
October 30, 2014: New photo from Douglas Butler

August 29, 2014

CSX - Anacostia River Bridge (Washington, District of Columbia)
Pony/through plate girder bridge over Anacostia River on Conrail/CSX RR
August 29, 2014: New photo from Luke

CSX - Anacostia River Bridge (Washington, District of Columbia)
Pony/through plate girder bridge over Anacostia River on Conrail/CSX RR
August 29, 2014: Updated by Alexander D. Mitchell IV: Corrected status; bridge not "lost"

August 20, 2014

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
August 20, 2014: Updated by Alexander D. Mitchell IV: added details from DC Highway Department publication

Chain Bridge (Eighth) (Washington, District of Columbia)
Haunched deck plate girder bridge over Potomac River and Chesapeake & Ohio Canal
August 20, 2014: Updated by Luke: Added photograph

Chain Bridge (Seventh) (Washington, District of Columbia)
Lost Whipple through truss bridge over Potomac River on Chain Bridge Road
August 20, 2014: Added by Alexander D. Mitchell IV

Chain Bridge (Eighth) (Washington, District of Columbia)
Haunched deck plate girder bridge over Potomac River and Chesapeake & Ohio Canal
August 20, 2014: Updated by Alexander D. Mitchell IV: Entered info from DC Highways Department

August 6, 2014

CSX - Anacostia River Bridge (Washington, District of Columbia)
Pony/through plate girder bridge over Anacostia River on Conrail/CSX RR
August 6, 2014: New Street View added by Douglas Butler

July 10, 2014

Wisconsin Avenue Bridge (Washington, District of Columbia)
Stone arch bridge over C&O Canal on Wisconsin Avenue
July 10, 2014: New photos from Andrew Raker

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
July 10, 2014: New photos from Andrew Raker

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
July 10, 2014: New photos from Andrew Raker

July 9, 2014

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
July 9, 2014: New photos from Andrew Raker

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
July 9, 2014: New photos from Andrew Raker

14th Street Bridge (Washington, District of Columbia)
Steel stringer bridge over Potomac River and Ohio Drive on Interstate 395 and US 1
July 9, 2014: New photos from Andrew Raker

Dumbarton Bridge (Washington, District of Columbia)
Five-span concrete arch bridge over Rock Creek and Potomac Parkway on Q Street NW
July 9, 2014: New photos from Andrew Raker

June 20, 2014

CSX - Anacostia River Bridge (Washington, District of Columbia)
Pony/through plate girder bridge over Anacostia River on Conrail/CSX RR
June 20, 2014: Added by Douglas Butler

March 4, 2014

Chain Bridge (Sixth) (Washington, District of Columbia)
Lost Howe through truss bridge over Potomac River and Chesapeake and Ohio Canal on Chain Bridge Road
March 4, 2014: Photo imported by Fmiser

February 26, 2014

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
February 26, 2014: Photo imported by Dave King

February 19, 2014

Capital Crescent Trail - Canal Road Overpass (Washington, District of Columbia)
Whipple through truss and Pratt through truss bridge over Canal & Arizona Avenue on Capital Crescent Trail (formerly B&O Railroad)
February 19, 2014: Updated by Alexander D. Mitchell IV: Name corrected; crosses Canal Road, not Arizona Avenue

February 18, 2014

Capital Crescent Trail - Canal Road Overpass (Washington, District of Columbia)
Whipple through truss and Pratt through truss bridge over Canal & Arizona Avenue on Capital Crescent Trail (formerly B&O Railroad)
February 18, 2014: Updated by Alexander D. Mitchell IV: Additional history and photo added

November 21, 2013

Long Bridge (Second) (Washington, District of Columbia)
Howe through truss bridge
November 21, 2013: Updated by Luke Harden: Removed streetview as the bridge this entry hasn't existed since 1906

October 7, 2013

Long Bridge (Second) (Washington, District of Columbia)
Howe through truss bridge
October 7, 2013: New Street View added by J.P.

Frederick Douglass Memorial Bridge (Washington, District of Columbia)
Bridge over Anacostia River on South Capitol Street
October 7, 2013: New Street View added by J.P.

September 16, 2013

Frederick Douglass Memorial Bridge (Washington, District of Columbia)
Bridge over Anacostia River on South Capitol Street
September 16, 2013: Added by K. A. Erickson

August 22, 2013

CSX - Potomac River Swing Bridge (Washington, District of Columbia)
Through truss and girder bridge over Potomac River on CSX Railroad
August 22, 2013: New photo from Douglas Butler

August 15, 2013

Wisconsin Avenue Bridge (Washington, District of Columbia)
Stone arch bridge over C&O Canal on Wisconsin Avenue
August 15, 2013: New photo from Michael Miller

July 7, 2013

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
July 7, 2013: Photo imported by Clark Vance

June 14, 2013

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
June 14, 2013: New photo from M. D. Caillet

April 6, 2013

Capital Crescent Trail - Canal Road Overpass (Washington, District of Columbia)
Whipple through truss and Pratt through truss bridge over Canal & Arizona Avenue on Capital Crescent Trail (formerly B&O Railroad)
April 6, 2013: New photos from Andy Peters

March 5, 2013

Highway Bridge (Washington, District of Columbia)
Lost Pratt through truss bridge over Potomac River on 14th Street/U.S. 1
March 5, 2013: Added by Alexander D. Mitchell IV

March 1, 2013

Chain Bridge (Eighth) (Washington, District of Columbia)
Haunched deck plate girder bridge over Potomac River and Chesapeake & Ohio Canal
March 1, 2013: Updated by Andy Peters: adds detail to overview and what the bridge crosses

February 27, 2013

Boulder Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Beach Drive located within Rock Creek Park
February 27, 2013: Updated by Andy Peters: adds NHRP reference number; changes primary name of bridge; adds name of builders

January 23, 2013

Piney Branch Parkway Bridge (Washington, District of Columbia)
Concrete arch bridge over Piney Branch Parkway on 16th Street NW
January 23, 2013: Updated by Andy Peters: adds A. Phimister Proctor as sculptor of tiger; adds 16th Street Bridge as alternate name

Taft Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Connecticut Avenue
January 23, 2013: Updated by Andy Peters: adds Taft Bridge as primary name; adds Roland Hinton Perry as sculptor of lions

Dumbarton Bridge (Washington, District of Columbia)
Five-span concrete arch bridge over Rock Creek and Potomac Parkway on Q Street NW
January 23, 2013: Updated by Andy Peters: changes primary name to Dumbarton Bridge; adds link to short history of the bridge

December 20, 2012

Dumbarton Bridge (Washington, District of Columbia)
Five-span concrete arch bridge over Rock Creek and Potomac Parkway on Q Street NW
December 20, 2012: Updated by Luke Harden: Edited builde's section.

Dumbarton Bridge (Washington, District of Columbia)
Five-span concrete arch bridge over Rock Creek and Potomac Parkway on Q Street NW
December 20, 2012: Updated by Andy Peters: Adds names of architect, engineer, contractor and buffalo sculptor; adds date of NR listing; adds NRHP record number.

November 16, 2012

CSX - Potomac River Swing Bridge (Washington, District of Columbia)
Through truss and girder bridge over Potomac River on CSX Railroad
November 16, 2012: New Street View added by Jared Mixson

Aqueduct Bridge (2nd) (Washington, District of Columbia)
Lost Howe deck truss bridge over Potomac River on Canal and Road
November 16, 2012: New photo from Jared Mixson

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
November 16, 2012: Updated by Jared Mixson: Removed category "VA 29"

Aqueduct Bridge (1st) (Washington, District of Columbia)
Lost Timber stringer bridge over Potomac on Canal
November 16, 2012: New photo from Jared Mixson

November 5, 2012

Taft Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Connecticut Avenue
November 5, 2012: New photo from Mike Roegner

Duke Ellington Memorial Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Calvert Street
November 5, 2012: New photos from Mike Roegner

August 10, 2012

W&GF - Foundry Branch Bridge (Washington, District of Columbia)
Pratt deck truss bridge over Foundry Branch on The Washington and Great Falls Electric Railway
August 10, 2012: Updated by Daniel Hopkins: Added category "Railroad"

Capital Crescent Trail - Canal Road Overpass (Washington, District of Columbia)
Whipple through truss and Pratt through truss bridge over Canal & Arizona Avenue on Capital Crescent Trail (formerly B&O Railroad)
August 10, 2012: Updated by Daniel Hopkins: Added category "Railroad"

July 25, 2012

Chain Bridge (Sixth) (Washington, District of Columbia)
Lost Howe through truss bridge over Potomac River and Chesapeake and Ohio Canal on Chain Bridge Road
July 25, 2012: Updated by Craig Philpott: Added category "Wooden deck"

July 17, 2012

Long Bridge (Second) (Washington, District of Columbia)
Howe through truss bridge
July 17, 2012: Added by Alexander D. Mitchell IV

Capital Crescent Trail - Canal Road Overpass (Washington, District of Columbia)
Whipple through truss and Pratt through truss bridge over Canal & Arizona Avenue on Capital Crescent Trail (formerly B&O Railroad)
July 17, 2012: Photo imported by Luke Harden

Aqueduct Bridge (1st) (Washington, District of Columbia)
Lost Timber stringer bridge over Potomac on Canal
July 17, 2012: Updated by Alexander D. Mitchell IV: details from local history added

Chain Bridge (Eighth) (Washington, District of Columbia)
Haunched deck plate girder bridge over Potomac River and Chesapeake & Ohio Canal
July 17, 2012: Updated by Luke Harden: Removed city name from builder

Chain Bridge (Eighth) (Washington, District of Columbia)
Haunched deck plate girder bridge over Potomac River and Chesapeake & Ohio Canal
July 17, 2012: Added by Alexander D. Mitchell IV

April 10, 2012

W&GF - Foundry Branch Bridge (Washington, District of Columbia)
Pratt deck truss bridge over Foundry Branch on The Washington and Great Falls Electric Railway
April 10, 2012: Updated by Alexander D. Mitchell IV: Added Photos

April 9, 2012

W&GF - Foundry Branch Bridge (Washington, District of Columbia)
Pratt deck truss bridge over Foundry Branch on The Washington and Great Falls Electric Railway
April 9, 2012: New Street View added by Alexander D. Mitchell IV

November 13, 2011

Capital Crescent Trail - Canal Road Overpass (Washington, District of Columbia)
Whipple through truss and Pratt through truss bridge over Canal & Arizona Avenue on Capital Crescent Trail (formerly B&O Railroad)
November 13, 2011: Photo imported by Luke Harden

Aqueduct Bridge (3rd) (Washington, District of Columbia)
Lost Pratt deck truss bridge over Potomac River on Road/Electric Railroad
November 13, 2011: Added by J.P.

Aqueduct Bridge (1st) (Washington, District of Columbia)
Lost Timber stringer bridge over Potomac on Canal
November 13, 2011: Updated by J.P.: added description

Aqueduct Bridge (2nd) (Washington, District of Columbia)
Lost Howe deck truss bridge over Potomac River on Canal and Road
November 13, 2011: Updated by J.P.: added description

Capital Crescent Trail - Canal Road Overpass (Washington, District of Columbia)
Whipple through truss and Pratt through truss bridge over Canal & Arizona Avenue on Capital Crescent Trail (formerly B&O Railroad)
November 13, 2011: Added by J.P.

W&GF - Foundry Branch Bridge (Washington, District of Columbia)
Pratt deck truss bridge over Foundry Branch on The Washington and Great Falls Electric Railway
November 13, 2011: Added by J.P.

November 2, 2011

Duke Ellington Memorial Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Calvert Street
November 2, 2011: Updated by Nathan Holth: Added Official Name

Boundary Channel Bridge (Washington, District of Columbia)
Concrete arch bridge over Boundary Channel on Memorial Avenue
November 2, 2011: Photos imported by Nathan Holth

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
November 2, 2011: Photos imported by Nathan Holth

Connecticut Avenue Bridge (Washington, District of Columbia)
Steel arch bridge over Klingle Valley on Connecticut Avenue
November 2, 2011: Updated by Nathan Holth: Added Names and Photos

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
November 2, 2011: New photos from Nathan Holth

April 7, 2011

Humpback Bridge (Washington, District of Columbia)
Lost Ribbed closed-spandrel arch bridge over Boundary Channel on George Washington Memorial Parkway
April 7, 2011: Added by Nathan Holth

March 7, 2011

Pennsylvania Avenue Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Pennsylvania Avenue
March 7, 2011: Updated by Nathan Holth: Expanded History To Discuss Cast Iron Arch.

March 3, 2011

14th Street Bridge (Washington, District of Columbia)
Steel stringer bridge over Potomac River and Ohio Drive on Interstate 395 and US 1
March 3, 2011: New Street View added by Chris Patriarca

February 20, 2011

CSX - Potomac River Swing Bridge (Washington, District of Columbia)
Through truss and girder bridge over Potomac River on CSX Railroad
February 20, 2011: Added by Robert Thompson

14th Street Bridge (Washington, District of Columbia)
Steel stringer bridge over Potomac River and Ohio Drive on Interstate 395 and US 1
February 20, 2011: Updated by Robert Thompson: Corrected description (US-1 only; I-395 bridges have different names)

August 7, 2010

Pennsylvania Avenue Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Pennsylvania Avenue
August 7, 2010: Posted HAER photos

May 10, 2010

14th Street Bridge (Washington, District of Columbia)
Steel stringer bridge over Potomac River and Ohio Drive on Interstate 395 and US 1
May 10, 2010: Added by J.R. Manning

May 8, 2010

Wisconsin Avenue Bridge (Washington, District of Columbia)
Stone arch bridge over C&O Canal on Wisconsin Avenue
May 8, 2010: New photos from Daniel McFarland

May 4, 2010

Wisconsin Avenue Bridge (Washington, District of Columbia)
Stone arch bridge over C&O Canal on Wisconsin Avenue
May 4, 2010: Updated by Nathan Holth: Added GPS.

Francis Scott Key Bridge (Washington, District of Columbia)
Concrete arch bridge over Whitehurst Freeway, George Washington Memorial Parkway, and Potomac River on Water Street (U.S. 29)
May 4, 2010: Updated by Nathan Holth: Updated bridge type and name.

Washington Blvd. Bridge (Washington, District of Columbia)
Pair of concrete arch bridges over Boundary Channel on Washington Blvd.
May 4, 2010: Updated by Nathan Holth: Added GPS and info.

Ross Drive Bridge (Washington, District of Columbia)
Concrete arch bridge over Horse Trail on Ross Drive
May 4, 2010: New Street View added by Nathan Holth

Rock Creek Parkway Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Rock Creek Parkway
May 4, 2010: New Street View added by Nathan Holth

Dumbarton Bridge (Washington, District of Columbia)
Five-span concrete arch bridge over Rock Creek and Potomac Parkway on Q Street NW
May 4, 2010: New Street View added by Nathan Holth

Piney Branch Parkway Bridge (Washington, District of Columbia)
Concrete arch bridge over Piney Branch Parkway on 16th Street NW
May 4, 2010: New Street View added by Nathan Holth

Pennsylvania Avenue Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Pennsylvania Avenue
May 4, 2010: Updated by Nathan Holth: Added GPS and info.

P Street Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on P Street NW
May 4, 2010: Updated by Nathan Holth: Added GPS and info.

Arlington Memorial Bridge (Washington, District of Columbia)
Bascule bridge with concrete arch approaches over Potomac River on Memorial Avenue
May 4, 2010: Updated by Nathan Holth: Updated bridge type.

Massachusetts Avenue Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Massachusetts Avenue
May 4, 2010: Updated by Nathan Holth: Updated GPS and info.

Connecticut Avenue Bridge (Washington, District of Columbia)
Steel arch bridge over Klingle Valley on Connecticut Avenue
May 4, 2010: Updated by Nathan Holth: Added GPS and info.

Duke Ellington Memorial Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Calvert Street
May 4, 2010: Updated by Nathan Holth: Added GPS and info.

Boundary Channel Bridge (Washington, District of Columbia)
Concrete arch bridge over Boundary Channel on Memorial Avenue
May 4, 2010: Updated by Nathan Holth: Added GPS and info.

Boulder Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Beach Drive located within Rock Creek Park
May 4, 2010: New Street View added by Nathan Holth

Taft Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Connecticut Avenue
May 4, 2010: New Street View added by Nathan Holth

February 16, 2010

Dumbarton Bridge (Washington, District of Columbia)
Five-span concrete arch bridge over Rock Creek and Potomac Parkway on Q Street NW
February 16, 2010: Updated by Bob Morgan: added map marker

Taft Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Connecticut Avenue
February 16, 2010: Updated by Bob Morgan: added map marker

February 1, 2010

Dumbarton Bridge (Washington, District of Columbia)
Five-span concrete arch bridge over Rock Creek and Potomac Parkway on Q Street NW
February 1, 2010: New photo from Daniel McFarland

April 19, 2009

Taft Bridge (Washington, District of Columbia)
Concrete arch bridge over Rock Creek on Connecticut Avenue
April 19, 2009: Posted HAER photos

September 15, 2006

Dumbarton Bridge (Washington, District of Columbia)
Five-span concrete arch bridge over Rock Creek and Potomac Parkway on Q Street NW
September 15, 2006: Posted HAER photos