Clonahenoge (''Cluain Fheannóg'' in
Irish) is a
townland in
County Offaly
County Offaly (; ga, Contae Uíbh Fhailí) is a county in Ireland. It is part of the Eastern and Midland Region and the province of Leinster. It is named after the ancient Kingdom of Uí Failghe. It was formerly known as King's County, in hono ...
,
Ireland. It is located at the confluence of the
Little Brosna River and the
River Shannon
The River Shannon ( ga, Abhainn na Sionainne, ', '), at in length, is the longest river in the British Isles. It drains the Shannon River Basin, which has an area of , – approximately one fifth of the area of the island of Ireland.
The Shan ...
.
Structures of note
Hamilton Lock and the Clonahenoge
canal were built about 1755 to allow river traffic to bypass the
Meelick rapids on the River Shannon. The
lock is now disused, replaced by nearby
Victoria lock, although the lock keepers cottage with roughcast walls (built 1755) is still in use for its original purpose. The lock is listed by the
National Inventory of Architectural Heritage (a service provided by the Department of Arts, Heritage and the Gaeltacht) as being of special interest.

Victoria Lock is the first lock on the River Shannon upstream of
Lough Derg. The locks dimensions are 142 ft x 40 ft. The Shannon Commissioners had the lock constructed in the 1840s as part of a widescale upgrade of the Shannon Navigation. The lock is of architectural and technical interest and is still in use today by pleasure boats, both private and fleets of rental cruisers who use the River Shannon and the connecting canals. The cast iron bollards at the lockside were made by
Fenton, Murray and Jackson
Fenton, Murray and Jackson was an engineering company at the Round Foundry off Water Lane in Holbeck, Leeds, West Yorkshire, England.
Fenton, Murray and Wood
Fenton Murray and Wood was founded in the 1790s by ironfounder Matthew Murray and ...
Engineers of
Leeds. A detached three-bay single-storey stone lock keeper's house (1843) is constructed from stone with a slate roof pierced by two stone chimneys. Although only single storey with a projecting central bay the house is a pleasing addition to the surrounding 19th-century development. The lock and cottage are both listed by the National Inventory of Architectural Heritage as being of special interest.
Meelick Martello Tower is a
Martello tower constructed on Moran Island in the
River Shannon
The River Shannon ( ga, Abhainn na Sionainne, ', '), at in length, is the longest river in the British Isles. It drains the Shannon River Basin, which has an area of , – approximately one fifth of the area of the island of Ireland.
The Shan ...
. The tower was built about 1811 to protect the river at Meelick where rapids provide a fording opportunity. Unusually the tower is cam-shaped with three gun emplacements. It reinforced the existing defences at Keelogue Battery on Incherky Island.
References
{{reflist
Townlands of County Offaly
Geography of County Offaly
Populated places on the River Shannon