<Table> <Tr> <Th_colspan="2"> Ukai dam </Th> </Tr> <Tr> <Td_colspan="2"> Ukai Dam </Td> </Tr> <Tr> <Th> Official name </Th> <Td> Ukai Water Resources Project </Td> </Tr> <Tr> <Th> Country </Th> <Td> India </Td> </Tr> <Tr> <Th> Location </Th> <Td> Surat district and Tapi district </Td> </Tr> <Tr> <Th> Coordinates </Th> <Td> 21 ° 14 ′ 53.67" N 73 ° 35 ′ 21.87" E ﻿ / ﻿ 21.2482417 ° N 73.5894083 ° E ﻿ / 21.2482417; 73.5894083 Coordinates: 21 ° 14 ′ 53.67" N 73 ° 35 ′ 21.87" E ﻿ / ﻿ 21.2482417 ° N 73.5894083 ° E ﻿ / 21.2482417; 73.5894083 </Td> </Tr> <Tr> <Th> Status </Th> <Td> Operational </Td> </Tr> <Tr> <Th> Construction began </Th> <Td> 1964 </Td> </Tr> <Tr> <Th> Opening date </Th> <Td> 1972 </Td> </Tr> <Tr> <Th> Construction cost </Th> <Td> Rs 1389.6 Million </Td> </Tr> <Tr> <Th_colspan="2"> Dam and spillways </Th> </Tr> <Tr> <Th> Impounds </Th> <Td> Tapti River </Td> </Tr> <Tr> <Th> Height (foundation) </Th> <Td> 80.772 metres (270 ft) </Td> </Tr> <Tr> <Th> Length </Th> <Td> 4,927 metres (16,000 ft) </Td> </Tr> <Tr> <Th> Spillways </Th> <Td> 22, radial </Td> </Tr> <Tr> <Th> Spillway type </Th> <Td> Ogee </Td> </Tr> <Tr> <Th> Spillway capacity </Th> <Td> 46,269 m / s </Td> </Tr> <Tr> <Th_colspan="2"> Reservoir </Th> </Tr> <Tr> <Th> Creates </Th> <Td> Vallabhsagar </Td> </Tr> <Tr> <Th> Total capacity </Th> <Td> 7,414 MCM </Td> </Tr> <Tr> <Th> Active capacity </Th> <Td> 6,730 MCM </Td> </Tr> <Tr> <Th> Catchment area </Th> <Td> 62,225 square kilometres (6.7 × 10 sq ft) </Td> </Tr> <Tr> <Th> Surface area </Th> <Td> 612 square kilometres (6.6 × 10 sq ft) </Td> </Tr> <Tr> <Th_colspan="2"> Power Station </Th> </Tr> <Tr> <Th> Type </Th> <Td> Conventional </Td> </Tr> <Tr> <Th> Hydraulic head </Th> <Td> 57 metres (190 ft) to 34 metres (110 ft) </Td> </Tr> <Tr> <Th> Installed capacity </Th> <Td> 300 MW </Td> </Tr> <Tr> <Td_colspan="2"> Website Ukai dam </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Ukai dam </Th> </Tr> <Tr> <Td_colspan="2"> Ukai Dam </Td> </Tr>

On which of the following rivers is ukai dam located