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Ship Information (from DANFS)1,2:

Name: USS Mahopac Type: Single-turreted Monitor Tonnage: 1,034
Length: 190’ Beam: 37’8” Draught: August 20, 1864: Forward: 11’10”, Amidships: 12’3”, Aft: 13’; October 13, 1864: :Loaded: 13’9”
Speed: Max: 6.3 knots Complement: Not Listed. Class: Canonicus
Armament: January 2, 1865: 2 15″
Namesake: Lake in New York, 50 miles south by east of New York City.

Images:

33958v: The monitor Mahopac, James River, Va.3

 

Captain(s):
Commander William A. Parker
WilliamAParkerUSNavyV64P31774

Lieutenant Commander James M. Prichett
Captain Image

Lieutenant Commander Edward E. Potter
Captain Image

Lieutenant Commander Aaron W. Weaver
Captain Image

Lieutenant Commander George E. Belknap
GeorgeEBelknapUSNavyV40P19755

Captain 6
Captain Image

 

First Offensive Order of Battle (June 13-18, 1864):

  • Not Present6

Second Offensive Order of Battle (June 19-30, 1864):

  • Captain:
  • Crew Strength:
  • Armament:

Third Offensive Order of Battle (July 1-31, 1864):

  • Not Present7

Fourth Offensive Order of Battle (August 1-31, 1864):

  • Not Present8

Fifth Offensive Order of Battle (September 1-October 13, 1864):

Sixth Offensive Order of Battle (October 14-31, 1864):

  • Captain:
  • Crew Strength:
  • Armament:

Seventh Offensive Order of Battle (November 1-December 31, 1864):

James River, Va. | North Atlantic Blockading Squadron | Union Navy (November 1 and December 5, 1864)12,13

Not Present (North Carolina) (December 15, 1864)14

  • Captain:
    • Commander William A. Parker (November 1, 1864)15
    • Lieutenant Commander James M. Prichett (December 5, 1864)16
    • Lieutenant Commander Edward E. Potter (December 15, 1864)17
  • Crew Strength:
  • Armament: 2 x “guns” (December 15, 1864)18
  • Note: On December 15, 1864, this ship is noted as a “Class 3” vessel.19

Eighth Offensive Order of Battle (January 1-February 28, 1865):

Not Present (North Carolina) (January 1 & 15, 1865)20,21\

Not Present (South Atlantic Squadron) (February 1 (and 15 & 25?), 1865)22,23,24

  • Captain: Lieutenant Commander Edward E. Potter (January 1 & 15 and February 1, 1865)25,26,27
  • Crew Strength:
  • Armament:
    • 2 x “guns” (January 1 & 15 and February 1, 1865)28,29,30
    • 2 x 15″ guns (January 2, 1865)31
  • Note: On January 1 & 15 and February 1, 1865, this ship is noted as a “Class 3” vessel.32,33,34

Ninth Offensive Order of Battle (March 1-April 2, 1865):

Not Present (March 18, 1865)35

James River, Va. | North Atlantic Blockading Squadron | Union Navy (April 1, 1865)(at Trent’s Reach April 1)36

Ordered to Washington, D. C. (on or before April 15, 1865)37

  • Captain:
    • Lieutenant Commander Aaron W. Weaver (April 1, 1865)38
    • Lieutenant Commander George E. Belknap (April 15, 1865)39
  • Crew Strength:
  • Armament: 2 x “guns” (April 1 & 15, 1865)40,41
  • Note: On April 1 & 15, 1865, this ship is noted as a “Screw Class” vessel.42,43

 

Siege of Petersburg Battles:

 

Siege of Petersburg Involvement:44

The first Mahopac, a heavily armored monitor built by Z. & F. Secor at New York, was launched 17 May 1864, and, after a trial trip 20 August [1864], commissioned at New York, Comdr. William A. Parker in command.

The single‑turreted monitor participated in the joint attack on Charleston 9 September [1864]. She operated on the James River in the autumn and steamed to the Wilmington area in time to join the bombardment of Fort Fisher 24 and 25 December 1864 and 13 through 15 January 1865. In the latter attacks, which doomed Wilmington, she was hit eight times without serious damage.

Next steaming to Charleston, Mahopac remained there on picket duty until 8 March [1865] when she returned to Chesapeake Bay. In April [1865], she and sister Union ships helped General Grant’s force in the capture of Richmond. She decommissioned in June [1865] and laid up at the Washington Navy Yard.

Mahopac recommissioned 15 January 1866 and operated along the east coast. Renamed Castor 15 June 1869, she resumed the name Mahopac 10 August. Going into reserve at Hampton Roads 11 March 1872, she recommissioned 21 November 1873 and sailed to Key West for fleet drill and remained there over 2 years. In 1876 she steamed to Port Royal and moved to Norfolk in July 1877. She was stationed with several other monitors at Brandon Landing until March 1880, when she proceeded to City Point, where she was based until 1888. She was in ordinary at Richmond 1889‑95, then moved to League Island. She was struck from the Navy Register 14 January 1902 and was sold 25 March 1902.

 

Bibliography:

    Siege of Petersburg Documents Which Mention This Unit:

    Sources:

    1. “DANFS.” Naval History and Heritage Command, www.history.navy.mil/content/history/nhhc/research/histories/ship-histories/danfs.html.
    2. Official Records of the Union and Confederate Navies in the War of the Rebellion, Series 2, Volume 1, p. 132
    3. The monitor Mahopac, i.e. Lehigh? James River, Va. (Photographed between 1861 and 1865, printed between 1880 and 1889)Photograph. Retrieved from the Library of Congress, <www.loc.gov/item/2013647376/>.
    4. William A. Parker image.  MOLLUS-Mass Civil War Photograph Collection, Vol. 64, Page 3177.  United States Army Heritage and Education Center, Carlisle, PA.
    5. George E. Belknap image.  MOLLUS-Mass Civil War Photograph Collection, Vol. 64, Page 3177.  United States Army Heritage and Education Center, Carlisle, PA.
    6. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume X, pp. 157158
    7. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume X, pp. 324325
    8. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume X, pp. 370371
    9. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume X, pp. 410412
    10. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume X, pp. 462463
    11. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume X, pp. 514515
    12. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 3940
    13. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 140142
    14. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 192194
    15. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 3940
    16. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 140142
    17. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 192194
    18. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 192194
    19. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 192194
    20. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 398400
    21. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 597599
    22. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 722724
    23. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 2021
    24. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 5455
    25. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 398400
    26. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 597599
    27. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 722724
    28. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 398400
    29. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 597599
    30. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 722724
    31. Official Records of the Union and Confederate Navies in the War of the Rebellion, Series 2, Volume 1, p. 132
    32. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 398400
    33. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 597599
    34. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XI, pp. 722724
    35. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 7173
    36. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 9394
    37. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 116118
    38. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 9394
    39. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 116118
    40. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 9394
    41. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 116118
    42. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 9394
    43. Official Records of the Union and Confederate Navies in the War of the Rebellion, Volume XII, pp. 116118
    44. “Mahopac I (Mon).” Naval History and Heritage Command, https://www.history.navy.mil/research/histories/ship-histories/danfs/m/mahopac-i.html.

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