WASHINGTON - Ontario's premier has defended the partial sale of Hydro One, insisting there will be oversight of the electricity utility after the government sells off up to 60 per cent of the operation.

Kathleen Wynne was responding to criticism from several provincial oversight agencies that the public would continue to own much of the utility, but not get to exercise much scrutiny over it.

Eight officers of the provincial legislature, in a public letter last week, bemoaned that the utility would become exempt from things like government audits, disclosure-of-lobbying rules and Access to Information law.

Wynne was asked about that letter in an interview during a trip to Washington, where she will speak at a public forum today after meeting with members of Congress and the Obama administration.

Wynne said companies have their own oversight models.

She suggested that will be the case when the province proceeds with the sale of 60 per cent of Hydro One, starting with an initial public offering of 15 per cent.