(All B. & O. works listed were designed by Bollman and built by the railroad, unless otherwise indicated.)
| Dates of service | Location | Type | No. spans / length of each | Remarks |
| 1850-? | Savage, Md., Little Patuxent River | Bollman through truss | 1/76' | First Bollman truss erected; granite towers; cost, $23,825. B. & O. RR. |
| 1851-? | Bladensburg, Md., Anacostia River | Bollman through truss | 1/? | Second Bollman truss erected; granite towers; cost, $19,430. B. & O. RR. |
| 1851-1862 | Harpers Ferry, Va., Potomac River | Bollman through truss | 1/124' | Winchester span; first major Bollman truss; three lines of truss; granite towers; blown up by Confederate Army on September 24, 1862. B. & O. RR. |
| 1851-? | Baltimore, Md., Carey Street | Trestle | — | Wood trestle bents with wrought-iron diagonals. First use of iron structural members in trestlework. Total length 76 feet. B. & O. RR. |
| 1852- | Savage, Md., Little Patuxent River | Bollman through truss | 2/?80' | Still standing. Moved to Savage in 1888; original location unknown. This and succeeding Bollman trusses use iron towers. B. & O. RR. |
| 1852 (or 1853)-? | Marriottsville, Md., Patapsco River | Bollman truss | 1/50' | One of first Bollman trusses with iron towers. B. & O. RR. |
| 1853-? | Zanesville, Ohio, Muskingum River | Bollman truss | 4/124' (or 5/160') | Double track, Central Ohio RR. Designed by Bollman; built by Douglas, Smith & Co., Zanesville. |
| 1854-1870(?) | Elysville (now Daniels), Md., Patapsco River | Bollman through truss | 3/97'9" | Upper bridge, skew. Cost, $24,477.59. B. & O. RR. |
| 1854-1862 | Monocacy, Md., Monocacy River | Bollman truss | 3/119' | Blown up September 8, 1862; rebuilt in 1864. Cost, $22,722.59. B. & O. RR. |
| 1854-? | Eastern Ohio | Bollman truss(?) | 1/40' | C. O. RR. Section 76 adjacent to 300-ft. tunnel. |
| 1855-? | Bridgeville, Ohio, Salt Creek | Bollman deck truss | 1/71' | C. O. RR. |
| Pre-1855-? | Buffalo, N.Y. | — | — | Unidentified. Mentioned by George Vose in Railroad Advocate (June 9, 1855). |
| 1856-? | Elysville, Md., about 1-1/4 miles east of 1854 bridge, Patapsco River | Bollman through truss | 3/111' | Lower Bridge. B. & O. RR. |
| Pre-1856-? | Marriottsville, Md. | Bollman truss(?) | 1/48'9" | Referred to as “Tunnel Bridge” in B. & O. RR. annual report, 1856. |
| 1856-? | Near Ijamsville, Md., Bush Creek | Iron girders | 3/23'9" | Possibly trussed beams; mentioned in B. & O. RR. annual report, 1856. |
| 1856-? | Near Ijamsville, Md., Bush Creek | Iron girders | 2/23'9" | As above. |
| 1856-c.1862 | North Branch, Md., Potomac River | Bollman deck truss | 3/142' | Partially destroyed in Civil War. B. & O. RR. |
| 1860-1906 | Chile, Angostura River | Bollman truss(?) | 4/115' | Chilean Railways. Designed and built by Bollman. Replaced by bridge built by French firm of Schneider, Cruesot & Co. |
| 1860-1910 | Chile, Paine River | Bollman truss(?) | 1/? | As above. |
| Post-1860-? | Ilchester, Md., Patapsco River | Bollman through truss | 1/? | B. & O. RR. |
| Pre-1861-? | Cuba | Bridges and station house | — | All bridges on Havana RR., including iron station house and bridge at Guines. Designed and built by Bollman. |
| Pre-1861-? | Cuba | Bridges | — | All bridges on Cienfuegos RR., Cárdenas RR., and Havana & Matanzas RR. Designed and built by Bollman. |
| Pre-1861-? | Cuba | Trestle | — | Trestle with wrought-iron columns (the first such ever constructed). Havana RR. Designed and built by Bollman. |
| 1862-1862 | Harpers Ferry, Va., Potomac River | Bollman through truss | 2/160' | Span no. 3 (July 24) and span no. 4 (August 21). Blown up September 24, 1862. B. & O. RR. |
| 1862-1936 | Harpers Ferry, Va., Potomac River | Bollman through truss | 1/160' | Span no. 5 (November). B. & O. RR. |
| 1863-1936 | Harpers Ferry, Va., Potomac River | Bollman through truss | 3/160' | Spans nos. 3, 4, and 5. Constructed previous to April 1863. B. & O. RR. |
| 1863-? | Berwyn, Md., Paint Branch | Bollman truss(?) | ? | Iron bridge mentioned in B. & O. RR. annual report, 1863 |
| 1863(4?)-? | Clinton, Iowa, Mississippi River | Pivot draw | 1/360' | Built by Detroit Bridge & Iron Works. It was the longest in the world at time of completion. Designed by Bollman. |
| 1864-? | Laurel, Md., Patuxent River | Bollman truss | ? | Replaced stone arch that had been washed out. B. & O. RR. |
| c. 1864-? | Near Veracruz, Mexico, Medellín River | Bollman hrough truss | 1/115' | Veracruz & Jucaro RR. First iron bridge in Mexico. Designed and built by Bollman. |
| 1864-? | Near Point of Rocks, Md., Back Creek | Bollman truss(?) | 1/80'(?) | Iron bridge mentioned in B. & O. RR. annual report, 1864. The span length given is that of previous stone arch. |
| 1864-? | Bladensburg, Md., Anacostia River | Bollman truss | 1/? | Span for second track, to match 1851 span. B. & O. RR. |
| 1868-? | Cape Fear, N.C., Northeast Branch, Cape Fear River | Bollman truss(?) | 2/146'6" 1/164' pivot draw/150' | Wilmington Railway Bridge Co. This bridge was connected to that over the Northwest Branch by 2-1/2 miles of timber trestling. Designed and built by Bollman. |
| 1868-? | Cape Fear, N.C., Northwest Branch, Cape Fear River | Bollman truss(?) | 1/217'(?) pivot draw/150' | See above. |
| 1868-? | Quincy, Ill., Quincy Bay (in Mississippi River) | Bollman deck truss | 4/85' pivot draw/190' | Chicago, Burlington & Quincy RR. The pivot draw was formed of two 85-ft. simple Bollman deck spans whose outer ends hung from hog chains. Designed by Bollman; built by Detroit Bridge & Iron Works. |
| 1869-c.1892 | Baltimore, Md., over Jones Falls, B. & O. RR., and Northern Central RR. | Warren truss | 2/100'
2/55'6" | North Avenue Bridge. Composite double intersection truss; timber top chord and posts, wrought-iron lower chord and ties. In 55-ft. spans, both chords timber. Cost, $73,588. Built by Bollman. |
| c.1869-1936 | Harpers Ferry, Va., Potomac River | Bollman through truss | 4/? | Canal span (no. 8), Wide span (no. 2), Winchester span, and West End span. Destroyed by flood in 1936. B. & O. RR. |
| 1870-.1895 | Baltimore, Md., Jones Falls | Iron “Isometrical truss” (probably Pratt type) | 1/108' | Charles Street Bridge. Three lines of trussing.Cost, $20,297. Built by Bollman. |
| 1870-1893 & 1900 | Bellaire, Ohio-Benwood W. Va., Ohio River | Bollman deck truss | 9/107'-125' | In approaches; 2 spans on Ohio side; 7 on West Virginia side. B. & O. RR. |
| 1870-c.1895 | Belpre, Ohio-Parkersburg, W. Va., Ohio River | Bollman deck truss | 16/? | In approaches; 7 spans on Ohio side; 9 on West Virginia side. B. & O. RR. |
| 1870-? | Elysville, Md., Patapsco River | Bollman through truss | 4/? | Skew; replacement of Upper Bridge(?). B. & O. RR. |
| 1871-c.1895 | Baltimore, Md., Jones Falls | Timber and iron truss | ? | Decker Street (now Maryland Avenue) Bridge. Cost, $24,975. Built by Bollman. |
| 1871-c.1892 | Baltimore, Md., over Northern Central RR. at Jones Falls | Warren truss | 1/100' | North Avenue Bridge. Composite double intersection truss; cast-iron top chord and posts; wrought-iron bottom chord and ties. West span. Built by Bollman. |
| 1873-1923 | Cave Station, Va., Middle River | Bollman deck truss | 1/98'7"
1/63'5" | Valley Railroad of Virginia (B. & O.) Bridge no. 120. The main span was a Whipple deck truss. Replaced with plate girders. Designed by Bollman. |
| 1873-1923 | Mount Crawford, Va., North River | Bollman deck truss | 2/98'6"
1/148'9" | Valley Railroad of Virginia (B. & O.) Bridge no. 117. Designed by Bollman. |
| 1873-1923 | Verona, Va., North River | Bollman deck truss | 3/98'7" | Valley Railroad of Virginia (B. & O.) Bridge no. 129. The main span was a 147-ft. Whipple deck truss. Designed by Bollman. |
| 1873-? | Wadesville, Va., Opequon Creek | Bollman through truss | 1/147'8" | Span length given is that of previous wood span that burned in 1862. B. & O. RR. |
| c. 1873- | Baltimore, Md. | Iron roof trusses | ? | First Presbyterian Church. Built by Bollman; possibly designed by him. |
| 1873- | Baltimore, Md. | Cast-iron stairs | | City Hall. Cost, $12,840. Designed by George A. Frederick, architect; built by Bollman. |
| 1873- | Baltimore, Md. | Cast-iron framework | | Dome of the City Hall. Cost, $70,525. Designed by George A. Frederick; built by Bollman. |
| 1875-c.1913 | Baltimore, Md., Jones Falls | Iron truss | 1/? | Fayette Street Bridge. Cost, $9,396. Built by Bollman. |
| 1876-c.1913 | Baltimore, Md., Jones Falls | Single-beam iron bridge (truss?) | 1/? | Canton Avenue (now Fleet Street) Bridge. Cost, $8,904. Built by Bollman. |
| 1876-c.1913 | Baltimore, Md., Jones Falls | Single-beam iron bridge (truss?) | 1/? | Eastern Avenue Bridge. Cost, $12,382. Built by Bollman. |
| 1877- | Baltimore, Md., Jones Falls | Pratt and bowstring truss | 1/88'6" | Lombard Street Bridge. Three lines of truss; two outer trusses, composite cast- and wrought-iron polygonal Pratt type; center composite bowstring with Pratt-system web. Both chords are cast-iron water mains, bifurcated at the end bearings; cast-iron posts and wrought-iron ties. In service. Cost, $7,632. Designed by Jas. Curran, Baltimore water department; built by Bollman. |
| 1877-c.1913 | Baltimore, Md., Jones Falls | Iron truss | 1/? | Bath Street Bridge. Cost, $4,172. Built by Bollman. |
| 1879-? | Baltimore, Md. | Drawbridge | 1/? | Over entrance to City Dock. Cost, $13,182. Built by Bollman. |
| 1879-c.1930 | Baltimore, Md., over Jones Falls and railroad tracks | Warren truss | 2/173'9" | North Street (now Guilford Avenue) Bridge. Composite trusses; cast-iron top chord and end posts; wrought-iron bottom chord and web members. Cost, $38,772.45. Built by Bollman; designed by Latrobe. |
| 1881-1960 | Baltimore, Md., (Woodberry), Jones Falls | Wrought-iron Pratt truss | 1/? | Union Avenue Bridge. Built by Bollman; possibly designed by him. |
| ?-? | Harpers Ferry, Va., Arsenal Canal | Bollman through truss | 1/148' | Arsenal Branch, B. & O. RR. Skew type. Span length is that of previous timber span. |
| ?-? | Baltimore, Md., Gwynns Falls | Bollman through truss | 2/? | B. & O. RR. |
Baltimore and Ohio Railroad Company. A list of the officers and employees of the Baltimore and Ohio Railroad for November, 1857. Baltimore, 1857.
----. Third annual report of the president and directors to the stockholders of the Baltimore and Ohio Rail Road Company. Baltimore: 1829. (Also the fourth through 38th annual reports. Baltimore, 1830-1864.)
----. Baltimore and Ohio exhibits at the Century of Progress. Chicago, 1934.