San Francisco Mayor Ed Lee plans to introduce two pieces of legislation Tuesday aimed at creating three new emergency Navigation Centers — residential shelters that offer services to the city’s homeless population.

The bills follow a commitment Lee made last month to bring 1,000 people off the streets this winter, and they’re being introduced in parallel with a separate plan to open a 25-bed facility catering specifically to homeless women and pregnant women.

One proposed resolution would allow the city to lease a roughly 31,000-square-foot parcel at 125 Bayshore Blvd. in the city’s Visitacion Valley neighborhood that would hold between 100 and 125 beds.

The shelter is intended to be a temporary one, with an initial six-month lease giving way to five one-year renewal options through September 2023. The annual rent for the parcel would come to $489,000, with 3 percent increases each year. The city is hoping to open that center by February.

Lee’s second measure would allow the city to begin formal negotiations with the California Department of Transportation for two more temporary Navigation Center sites. One, at Fifth and Bryant streets, would house 80 beds. The other, at 13th and Division streets, would house about 100 beds. Lee announced the city would seek to turn those locations into emergency Navigation Centers last month, and both are expected to be opened by next spring.

Separately, the city is closing in on the creation of a permanent Navigation Center for women and expectant mothers living on the street. The facility would be located at the former Jelani House, a now-closed residential treatment program for women and mothers facing substance abuse issues.

Supervisor Jane Kim worked with the city’s Department of Homelessness and Supportive Housing to secure the site for women and pregnant women.

“It’s been a long-term goal for her to get a women’s-only shelter in her district,” said Ivy Lee, a legislative aide for Kim.

Jeff Kositsky, director of the city’s homelessness department, said he was “very excited about the mayor’s challenge to get 1,000 people off the street. Along with other city departments we’re actively looking at a variety of locations for a host of different kinds of programs.”

He declined, however, to comment on any “negotiations currently in progress.”

Currently, San Francisco has two Navigation Centers in the Mission, one in Dogpatch, one in the Civic Center and one at San Francisco General Hospital.

— Dominic Fracassa

Emergency money: San Francisco likely will dip into its reserve fund to pay for a state program that helps elderly and disabled people, which this year left the city with an $8.8 million tab.

That money would come from a $10 million reserve meant to cope with unanticipated budget shortfalls. Lee has asked the Board of Supervisors Budget and Finance Committee to release about $9.6 million of it on Thursday.

“At a time when priorities are shifting at the federal and state levels, it is critical that cities practice fiscal restraint to help mitigate any unexpected funding cuts,” the mayor wrote in a statement. He praised the city for hoarding money during a time of prosperity.

The bulk of the reserve funds would go to In-Home Support Services, a state program that provides attendants for a booming population of elderly people, allowing them to live independently instead of in nursing homes.

It hit turbulence this year when Gov. Jerry Brown shifted much of the burden back to counties. San Francisco had set aside more than $11 million to prepare for its increased share of the costs, which shot up to about $20 million.

Another $686,000 in reserves would compensate for federal Centers for Disease Control and Prevention cuts to HIV and AIDS prevention programs.

And $73,000 would pay for 142 applications to the Deferred Action for Childhood Arrivals program, which protects undocumented immigrants who came to the United States as children. Lee waived the fees for people eligible to renew their DACA benefits after President Trump upended the program in September.

— Rachel Swan

Dominic Fracassa and Rachel Swan are San Francisco Chronicle staff writers. Email: cityinsider@sfchronicle.com, dfracassa@sfchronicle.com, rswan@sfchronicle.com Twitter: @sfcityinsider, @dominicfracassa, @rachelswan