← All structures
Lock or dam · from the US Coast Guard investigation record
L&D 20
The vessels recorded in 9 Coast Guard casualty investigations naming this lock or dam, 2006–2025: 17 vessel mentions, 16 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 |
|---|---|---|---|---|---|
| CITY OF JOLIET Involved in a Marine Casualty | 2025-03-23 | Routine · serious marine incident | Undamaged - Operational | — | 0 dead, 1 injured, 0 missing |
| M/V JOYCE HALE Involved in a Marine Casualty | 2018-05-07 | Routine | Undamaged - Operational | — | none recorded |
| IN075406 Involved in a Marine Casualty ING 5839 Involved in a Marine Casualty NEIL N. DIEHL Involved in a Marine Casualty |
2017-02-28 | Routine | Damaged and Not Repaired - Operational | $99,000 | none recorded |
| WISCONSIN Involved in a Marine Casualty | 2014-04-19 | Routine | Undamaged - Operational | $257,639 | none recorded |
| CF-103-L Involved in a Marine Casualty SCOTT STEGBAUER Involved in a Marine Casualty |
2012-10-12 | Routine | Undamaged - Operational | — | none recorded |
| AGS 762 Involved in a Marine Casualty REGGIE G. Involved in a Marine Casualty |
2010-11-11 | Routine | Damaged and Not Repaired - Operational | $90,000 | none recorded |
| AUBREY B HARWELL JR Involved in a Marine Casualty QUEEN CITY Transiting Vicinity of Primary Subject |
2009-11-17 | Routine | Undamaged - Operational | — | none recorded |
| M/V JAMES W BUKY Involved in a Marine Casualty O.H. INGRAM Involved in a Marine Casualty SCNO 8117 Involved in a Marine Casualty |
2007-07-13 | Routine | Undamaged - Operational | — | none recorded |
| ARDYCE RANDALL Involved in a Marine Casualty RRS 7933 Involved in a Marine Casualty |
2006-04-04 | Routine | Undamaged - Operational | $1,000 | 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 |
|---|---|
| 2006 | 1 |
| 2007 | 1 |
| 2009 | 1 |
| 2010 | 1 |
| 2012 | 1 |
| 2014 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2025 | 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
L&D 20
Also recorded as
LOCK 20 (2)
L/D 20 (2)
Lock and Dam 20 (1)
L/D 20 (2)
Lock and Dam 20 (1)
Type
Lock or dam
Coast Guard unit
USCG Heartland District (CGD-H) · Sector Upper Mississippi River; Marine Safety Detachment Quad Cities; MSO ST LOUIS
Maury structure id
str-ee89599c60
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.