| Bridge Name: | Kilnap Viaduct |
| Carries: | Dublin–Cork railway line |
| Crosses: | Glennamought River |
| Locale: | Cork, Ireland |
| Maint: | Transport Infrastructure Ireland |
| Material: | Limestone |
| Spans: | 8 |
| Complete: | 1845 |
| Open: | 28 September 1848 |
| Coordinates: | 51.9268°N -8.4875°W |
The Kilnap Viaduct (known colloquially as the Eight-Arch Bridge) is an eight-arch railway viaduct located in Cork, Ireland. Built in 1845, it carried the Great Southern & Western Railway line to Cork over the valley of Glennamought River and Mallow Road.[1] The viaduct is listed as a protected structure by Cork City Council.[2]
The eight-arch railway viaduct features rock-faced ashlar limestone piers with a cut stone impost supporting squared coursed limestone spandrels with dressed limestone string course. It has rock-faced limestone voussoirs leading to round-headed arches, ashlar limestone vaults to barrels and a squared coursed limestone parapet with cut stone coping.[1] The viaduct was built by William Dargan.[3]
As built, it was 420 ft long and 90 ft high.[4]