River Lee Generating Stations COUNTY

mmm *»* Front cover shows Inishcarra Generating Station Generating Inishcarra shows cover Front Part o f Generator at Carrigadrohid at Generator f o Part Development w mcie a Insar ae ae a 1,0 and 15,000 at rated are Inniscarra at machines two Hydro-Electric Lee h to e sain i 7 mlin units. million 77 is Lee stations two the million. £4^ was and Carrigadrohid Borland-type at dams Lee, the River into passes the built are infish fishing the preserve To Carriga­ The networks. distribution volt 10,000 and volt per metres cubic 27.5 is Inniscarra at river the of flow 790 is Inniscarra to Leedown the area of catchment The 8,000kW; was 4,000kW. at The4,000kWset i nsta rated I is led at Carrigadrohid I at n n iscarraturbo-generator to g i ve LeeRiver between the of development hydro-electric The were commissioned in 1957. The cost of all the work work the all of cost The 1957. in commissioned were Inniscarra. remotely is upstream, from miles At ten controlled is city. which station, Cork drohid of outskirts the on Kilbarry at system the in capacity storage The sec). cu (970 second squareThe average miles). (306 annual squarekilometres city. Cork steam the in Lee and the station on stations hydro the both to requirements set the meet actsalso to asIt riverCork a houseat city. plant supply the aof water down The flow sufficient bridges. road main three and roads public of The Inniscarra.eleven of necessitatedmiles development and the construction Carrigadrohid at stations power and of the Lee was commenced in 1952 and both stations stations both and 1952 in commenced was Lee the of stations generate at 10,000 volts. This is stepped up to to up stepped is This volts. 10,000 at generate both stations in alternators The is flow. averageannual the which metres, 5.2%of cubic million 45.4 to amounts reservoir Constructional work on the hydro electric development development electric hydro the on work Constructional transmission main the to transmitted and volts 110,000 and Cork is in two steps and comprises dams comprises and steps two in is Cork and Macroom In a year with average rainfall, the generated output of of output generated the rainfall, average with year a In Inniscarra. 38,000 local the into also provided are feeds Inniscarra

PRINCIPAL TECHNICAL PARTICULARS

Catchment area...... 1,400 km 2 (306 sq. miles) Average annual rainfall...... 1,524 mm. (60 in.) Average annual flow (Inniscarra)...... 27.5 m s/sec. (970 cu. secs.) Storage capacity...... 45.4 x 10 ‘m 3 (5.2% of annual flow)

Generating Station Carrigadrohid length 350 ft. 800 ft. Dam height 70 ft. 140 ft. Spillway gates Three, 10 ft. Three, 40 ft.

Turbines Number 1 2 Type Kaplan Kaplan Head 13.55 m 29.4 m Rating, H.P. 11,600 21,600 and 5,800 R.P.M. 167 214 and 428 Year commissioned 1957 1957 Maker Voith Voith

Generators Type 3 phase, 50 cycle Normal rating, kVA 11,500 21,400 and 5,700 Power factor 0.7 Voltage 10,500 Maker Siemens Schuckert Brown-Boveri

Main Transformers Rating, kVA 12,000 27,000 and 5,000 Maker A.S.E.A.

Switchgear and Control Gear Maker A.S.E.A.

Average Annual Output: Carrigadrohid ...... 21x10" kWh Inniscarra ...... 56 x 102 kWh Total 77 x 106 kWh

The Generating Hall, Inishcarra One of our many Stations

Of the 28 generating stations 9 are hydro, 4 operate on milled peat, 6 on sod peat, 1 on native coal, 6 on oil, 1 on sod/milled peat and 1 on coal or oil.

HYDRO STATIONS Capacity STEAM STATIONS Capacity M w. Mw. : Ardnacrusha 85 Portarlington (Co. Laois) sod peat 38 : Pollaphuca 30 Golden Falls 4 Tarbert Island (Co. Kerry) Leixlip 4 o il 120 : Cathaleen's Fall 45 Allenwood (Co. Kildare) Cliff 20 sod peat 40 River Lee: Inniscarra 19 Ferbane (Co. Offaly) Carrigadrohid 8 milled peat 90 River Clady: Clady 4 Lanesborough (Co. Longford) sod and m illed peat 60 219 Rhode (Co. Offaly) milled peat 80 UNDER CONSTRUCTION Bellacorick (Co. Mayo) Pumped Storage milled peat 40 Turlough Hill, Co. W icklow 292 Shannonbridge (Co. Offaly) milled peat 40 STEAM STATIONS Capacity Arigna (Co. Roscommon) Mw. native coal 15 Pigeon House "A " (Dublin City) M iltown-M albay (Co. Clare) oil 90 sod peat 5 North Wall (Dublin City) Screeb (Co. Galway) o il 48 sod peat 5 Ringsend (Dublin City) Cahirciveen (Co. Kerry) coal/oil 270 sod peat 5 Marina (Cork City) Gweedore (Co. Donegal) o il 120 sod peat 5 Pigeon House "B " o il 268 1,459 (Co. Wexford) Total Capacity, o il 120 Hydro and Steam 1,678 M w .

Carrigadrohid Generating Station

Produced by the Public Relations Office, E.S.B., 1 Fitzwilliam Place Dublin 2 and printed in Ireland by Printcraft.