SPRINGFIELD - An advocacy group for prison inmates said Thursday that services to care for the mental health of those locked up at the Tamms Correctional Center need to be reviewed.

Tamms is a so-called "supermax" facility where the state can send its most dangerous inmates. While there, inmates largely don't get to interact with each other.

The John Howard Association of Illinois reiterated concerns Thursday that the state doesn't properly care for the mental health of Tamms inmates.

And they argued no inmate should be held at Tamms more than a year, even though some have been there for 10 years.

"No one should be in a hole for 10 years," said state Rep. Julie Hamos, D-Evanston.

She has proposed legislation requiring inmates can't stay at Tamms for more than a year and no inmate with mental illness can be kept there.

Illinois Department of Corrections spokesman Thursday said they oppose that plan and that only the most dangerous prisoners are sent there after acting out at another state prison.

"The inmates who go to Tamms earned their way there," spokesman Derek Schnapp said.

About 250 inmates are held at Tamms.

Hamos' legislation is House Bill 6651.