The state Senate on Tuesday unanimously approved legislation to reform Georgia's criminal sentencing laws to divert nonviolent  drug and property offenders away from costly prison beds, saving the state tens of millions of dollars in projected corrections spending.

House Bill 1176, approved by a 51-0 vote, is intended to steer some low-level offenders to pretrial diversion programs such as drug and mental health courts and reserve the prison system for the state's most dangerous criminals.

The initiative is a top priority of Gov. Nathan Deal. The legislation must be approved once more by the House before it goes to the governor's desk for Deal's signature. House passage is a near certainty, as it initially passed the chamber with almost unanimous support.

"HB 1176 outlines much-needed reforms that will improve public safety, lower recidivism rates and bring real costs savings to Georgia taxpayers," Sen. Bill Hamrick, R-Carrollton, who handled the bill in the Senate, said. "Without action, taxpayers would have paid $264 million over the next five years to accommodate a rising prison population."

The Senate approved a few amendments to the legislation. One creates two new classes of burglary crimes, with one- to 20-year sentences for those who break into an occupied or unoccupied dwelling and one- to five-year terms for those who break into a building or structure, such as a tool shed. A previous version of the bill created three degrees of burglaries.

If the bill is enacted, Georgia would follow a number of other conservative southern states -- including Texas and South Carolina -- that have already adopted so-called "smart on crime" sentencing reform legislation.

Some who have followed the legislation said it would go too far in lessening punishment for some crimes, while others said the initiative does not do enough to reform the criminal justice system.

In an email last week to Putnam County residents, Sheriff Howard Sills strongly criticized HB 1176.

"Every thief, burglar, check forger and hoodlum from Trenton to Tybee, from Bainbridge to Blue Ridge will be grinning from ear to ear if this passes," Sills wrote. "When it comes to being soft on crime, this legislation will nestle our miscreants in a down-filled feather bed of comfort they never remotely thought they could slumber in."

Sara Totonchi, director of the Southern Center for Human Rights in Atlanta, disagreed. The bill, she said, "implements a very modest slice" of the reforms recommended by a special council of judges, lawyers and other officials that held meetings and issued a report on the initiative.

"If Georgia is to realize the crucial cost-saving and public safety benefits that have been promised, future reforms must be far more bold and innovative than what we've seen in 2012," Totonchi said.

A key provision of HB 1176 would create new categories for drug possession crimes, with less severe penalties for those caught with small amounts of narcotics and the most severe penalties for those found with large quantities. It also would increase the felony thresholds for theft and shoplifting crimes.

The legislation also includes a so-called "expungement" provision that would streamline the way individuals cleared of criminal charges can get their records restricted from view by prospective employers conducting background checks. The Georgia First Amendment Foundation had opposed that provision, saying it would undermine the Open Records Act, but the Senate kept it in the bill.