<Tr> <Td> 74 </Td> <Td> Seneca Lake </Td> <Td> New York </Td> <Td> 68 sq mi </Td> <Td> 176 km </Td> <Td> natural </Td> <Td> </Td> </Tr> <Tr> <Td> 75 </Td> <Td> Pickwick Lake </Td> <Td> Alabama - Mississippi - Tennessee </Td> <Td> 67 sq mi </Td> <Td> 174 km </Td> <Td> man - made </Td> <Td> </Td> </Tr> <Tr> <Td> 76 </Td> <Td> Table Rock Lake </Td> <Td> Arkansas - Missouri </Td> <Td> 67 sq mi </Td> <Td> 174 km </Td> <Td> man - made </Td> <Td> </Td> </Tr> <Tr> <Td> 77 </Td> <Td> Cayuga Lake </Td> <Td> New York </Td> <Td> 67 sq mi </Td> <Td> 174 km </Td> <Td> natural </Td> <Td> </Td> </Tr>

What is the largest man made lake in united states