SC Electric & Gas has filed a rebuttal to regulators saying it misled no one.

A state agency has accused SCE&G of misleading lawmakers and regulators in claiming it kept secret for months a critical Bechtel Corp. analysis of its failed $9 billion nuclear project.

SCE&G officials said they had a legal right to confidentiality as it was the basis for a possible lawsuit against Westinghouse Electric, its prime contractor.

The SCE&G filing attacked the Office of Regulatory Staff for seeking more records to convince Public Service Commissioners to lower electric rates for 700,000 ratepayers who are charged $37 million a month for the failed project.

SCE&G said it has given up thousands of pages of documents but regulators “painted a grossly incomplete and misleading’’ picture of its motives, according to a report in The State newspaper Tuesday.

In its latest filing with the PSC, SCE&G said it would turn over some Bechtel documents but not other records the ORS wants.

SCE&G said this sensitive information has nothing to do with the $325 more a year it charges 700,000 local businesses and home owners.

SCE&G has already given more information to federal officials investigating possible criminal actions.

Regulators will not promise SCE&G they won’t make the records public.

Friends of the Earth and Sierra Club attorney Bob Guild accused SCE&G of trying to “put the cat back in the bag. The company figures it can only prevail if it is behind closed doors.’’

SCE&G released handwritten notes in which SCE&G and its nuclear partner Santee Cooper disagreed on why Bechtel was hired.

The notes read, “Could we have two reports one public/one not?”

Another said Westinghouse did not want problems at the project to be known by another client.