← All structures
Lock or dam · from the US Coast Guard investigation record
LOCK AND DAM 21
The vessels recorded in 6 Coast Guard casualty investigations naming this lock or dam, 2005–2011: 33 vessel mentions, 32 hulls with a page on Maury.
Every investigation naming this structure
| Vessel, with role as recorded | Date | Classification | Structure status, as recorded | Property damage recorded | People |
|---|---|---|---|---|---|
| ACBL 424 Involved in a Marine Casualty ACBL 500 Involved in a Marine Casualty ACBL 6008 Involved in a Marine Casualty ACBL 6034 Involved in a Marine Casualty ACL 01549 Involved in a Marine Casualty CCT 96 Involved in a Marine Casualty FLOYD H.BLASKE Involved in a Marine Casualty PC 105 Involved in a Marine Casualty VL 81292 Involved in a Marine Casualty VL 81414 Involved in a Marine Casualty SIR J-ETTE Sighted in Area SIR-ENE Sighted in Area |
2011-08-12 | Routine | Undamaged - Operational | — | none recorded |
| REGGIE G. Involved in a Marine Casualty | 2010-10-24 | Routine | Undamaged - Operational | — | none recorded |
| IMT 145 Involved in a Marine Casualty MARY LUCY LANE Involved in a Marine Casualty |
2010-07-04 | Routine | Damaged and Not Repaired - Operational | $50,000 | none recorded |
| DAMON WAXLER Involved in a Marine Casualty | 2010-05-04 | Routine | Undamaged - Operational | — | none recorded |
| BOB STITH Involved in a Marine Casualty TTBL 4101 Involved in a Marine Casualty |
2007-10-28 | Routine | Undamaged - Operational | — | none recorded |
| AGS 141 Involved in a Marine Casualty AGS 145 Involved in a Marine Casualty AGS 256B Involved in a Marine Casualty AGS 727 Involved in a Marine Casualty AGS 735 Involved in a Marine Casualty AGS 790 Involved in a Marine Casualty AGS 811B Involved in a Marine Casualty AGS 834 B Involved in a Marine Casualty AGS 838 B Involved in a Marine Casualty MTC 465B Involved in a Marine Casualty NOMA 326B Involved in a Marine Casualty REGGIE G Involved in a Marine Casualty SCF 24060 Involved in a Marine Casualty AGS 118 Involved in a Marine Investigation (non-casualty) CC 7904 Involved in a Marine Investigation (non-casualty) |
2005-04-23 | Routine | Undamaged - Operational | $23,000 | none recorded |
A vessel’s role is the Coast Guard’s word for how it was involved, and it is shown exactly as recorded: a vessel “sighted near” an incident is not a striking vessel, and involvement is not fault. Where an investigation records anyone dead, injured or missing, only the
structured fields are shown and the narrative is withheld. Property damage is the total the investigation recorded,
in dollars of the year, never adjusted. Vessel names link to the hull’s page where Maury publishes one;
an unlinked name is a hull Maury holds and does not publish, or one it does not hold.
Investigations recorded, by year
| Year | Investigations recorded |
|---|---|
| 2005 | 1 |
| 2007 | 1 |
| 2010 | 3 |
| 2011 | 1 |
A count of investigation records that name this structure. It is not a rate: the
Coast Guard’s record of incidents is denser in some years and districts than others
(coverage), and the record for 1991 onward
is the one Maury holds.
Identity
Recorded as
LOCK AND DAM 21
Also recorded as
L&D 21 (3)
Type
Lock or dam
Coast Guard unit
USCG Heartland District (CGD-H) · Sector Upper Mississippi River; MSO ST LOUIS
Maury structure id
str-ad8ab86fa7
One recorded name under one Coast Guard unit. A grouping by name may include more than one structure.
Federal bridge record
Not matched to a federal bridge record. locks are not in the National Bridge Inventory; no federal structure record is loaded for them. Absence of a
match is a fact about the matching rule, not about the structure.
What this page is not
A fact about a structure, not a judgement about it or about anyone who owns it. Maury publishes no
score, rating or ranking for a structure, and no count or comparison for a bridge owner. A structure with no
page has no recorded involvement in the ranges Maury holds; that is not “never struck”.
Source: US Coast Guard Incident Investigation Reports through 13 September 2026; National Bridge
Inventory where matched. Coverage and known gaps.