two channels join again at the Cork docks and enter the extensive estuary and harbour, south of Glanmire, passing either side of Great Island (Cobh lies on the south coast) to fill the outer harbour, and reaching the open sea between Whitegate and Crosshaven. Tributaries Upper course (above Inchigeela) High tributaries include the Owenagariff, the Bunsheelin, the Paudeen and the Garrifowa. Middle course (to the Dripsey) Tributaries joining below Lough Allua and Inchigeela include the River Toon, the extensive Sullane River system, from near Ballyvourney (tributaries include the Douglas, Finnow, Foherish and Laney or Laine Rivers) via Macroom, the smaller Buinea and Glashagariff Rivers, and the River Dripsey and its tributaries the Rylane and the Delaghinagh. Near Cork city Below the last ESB dam, tributaries joining include the River Bride from Slievowen via Crookstown, Killumney and Ovens, and the River Shournagh (formed from the Blarney and Martin Rivers, and the Owennagearagh River; historically may have been the Awbeg River). City area City area tributaries include the combined Maglin (from Ballincollig) and Curraheen (occasionally Curragheen) Rivers, capturing the Glasheen River also and joining at the western end of the UCC complex, and the Kiln River (sometimes Bride River) which joins by the Christy Ring Bridge in the city centre, a little west of St. Patrick's Bridge (formed in turn from a Bride River and the Kilnap or Glennamought River, later joined by the Glen River). Tidal area Estuarine tributaries include the Glashaboy River, passing Glanmire (main tributaries the Black Brook, Cloghnageshee River and Butterstown River), the Douglas or Tramore River (joined by the Trabeg River as it flows into the Douglas Channel, its estuary) which drains parts of the southern city, Owennacurra River (joined by the Dungurney River at Midleton), and the Owenaboy River almost at the final mouth of the outer Lee estuary (the Liberty Stream joins this river, with significant flows from Cork Airport). Recreation Recreation activities on the Lee include sailing, swimming, kayaking, water skiing. Several rowing clubs are based on the Lee including the "Lee Rowing Club", "Shandon Boat Club" and “Cork Boat Club”. Naomhoga Chorcai is also based on the Marina, and is Ireland's largest Currach (traditional canvas fishing boat) rowing club. Angling is also common from the banks of the Lee Fields. Flooding Tidal considerations, combined with low-lying urban developments, and later dam management contribute to repeated flooding events on the Lee. For example, specific