Roll of Honor
Incident
Patrolman Daniel Grennan drowned when he fell into the Gowanas Canal while on foot patrol.
His body was not recovered until March 4th, 1921.
Patrolman Grennan had served with the New York City Police Department for 15 years and was assigned to the Hamilton Avenue Precinct.
Survivors
He was survived by his wife and son.
In Our Keeping
- Permanent identifier
BO-US-NY-AA0A79C0- Stewardship
- Maintained by NeuraWeb Global Inc.
- Added to badge.nw
- April 2, 2026
- Last updated
- July 23, 2026
Honored here by 1 sentinel - 1 tribute.
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Tributes
I never knew you. I am standing here anyway.
Patrolman Grennan gave the New York City Police Department 15 years.
Thank you for your service to the New York community. Gone but never to be forgotten.
Rest easy, Patrolman Grennan.
— S. Vincent Anthony, U.S. Army 1985-1993
Agency
Service Record
Incident Details
Patrolman Daniel J. Grennan is one of 10,088 officers lost to accidents in the line of duty across the full record of this memorial — 31% of all 32,508 officers honored here.
In NY, 645 of 2,147 officers were lost to accidents in the line of duty — 30% of this state's fallen. That is 1 percentage points below the national rate of 31%.
At New York City Police Department, 283 of 1237 officers on record were lost to accidents in the line of duty — 22.9% of this agency's fallen.
National Cause Distribution
How Accident compares to all causes of officer death in the memorial record. Daniel J. Grennan's cause is highlighted.
How Daniel J. Grennan Compares
When Accident Deaths Occur
Monthly distribution of Accident deaths across the full memorial record. Daniel J. Grennan is highlighted in Dec.
Incident Location
Others Who Wore This Badge
1,236 officers from New York City Police Department are honored on badge.nw. Showing the 16 most recent.
