It ain't all about congestion pricing.PlaNYC 2030, Mayor Michael Bloomberg's proposal to radically reshape the city, is a far-reaching document that could alter the way people live. But it does even more. There is an almost messianic quality to the plan and in its contention that as goes the city, so goes the nation, if not the world.But lost in the talk of hybrid taxis, millions of trees, and yes, paying a fee to get into Manhattan, are the less headline-grabbing details that could still transform important aspects of city life.amNewYork takes a closer look at some of the plan's overlooked elements.P.S. 109This majestic 19th century East Harlem schoolhouse, vacant since the late 1990s, is at the center of an acrimonious dispute between a group that wants to see it converted into housing for artists and a coalition that wants to see it restored as a school."There is such a need for this," said Shawn Patrick McLearan of Artspace, which is spearheading the housing effort. "There is a phenomenal cultural history here that we are trying to protect by putting the cultural infrastructure in place."Their plan would bring 62 units of affordable housing and a large community space.The Department of Education has said that making it a school again isn't feasible and most local elected officials agree. That hasn't stopped activist Gwen Goodwin from waging a campaign to restore the school to its previous use."Keeping P.S. 109 a school is the only fair, equitable and logical thing to do," she said. "There is such overcrowding in the city ... I will not quit until we have kids sitting in P.S. 109."P.S. 109 is set to open as artist's housing in 2009.Bike trailsWith sardine-like subway cars and creaking highways, the mayor hopes people will start jumping on bikes. The mayor is aiming to give away hundreds of free bike helmets, install 1,800 miles of bike lanes and add 1,200 street bike racks, many in places where cars once parked. "That's like beating swords into ploughshares for us," said Paul Steely White, executive director of Transportation Alternatives. The administration is exceeding its goals for laying down bike paths, but White wants them to pick up the pace even further.High BridgeThink of it as the High Line but without all the Chelsea bling. Built in 1848, the High Bridge is the oldest standing bridge in the city. The span was originally built to carry water from the Croton Aqueduct and linked Morris Heights in the Bronx and Washington Heights in Manhattan. Rising crime shuttered the bridge in the 1970s, but the city is planning on tying it with the regional greenway system. It's scheduled to open for walkers in 2009. "That's going to be a hallelujah day," said Charlotte Fahn, member of Friends of the Old Croton Aqueduct.Living above the BQEOne of wackier parts of the mayor's plan involves building a deck above the BQE where it dips down the middle of Hicks Street and building housing on top. Robert Moses built the highway in the 1950s, splitting Carroll Gardens and Cobble Hill. There are major engineering, zoning, and transportation obstacles, not to the mention the difficulty of convincing people to live atop an expressway. A spokesman for the city's housing department said the plan was still conceptual, but the possibilities are intriguing.Mussels as pollution control.The mayor wants to plant 20 cubic meters of ribbed mussel beds into Hendrix Creek next to the 26th Ward Wastewater Treatment Plant to naturally clean and filter nearby Jamaica Bay. "In the 19th Century, the natural way the harbor got cleaned was because it was full of mussels and clams," said Rohit Aggarwala, the director of long-term planning and sustainability, the department the mayor created to oversee PlaNYC2030. "If it works there, we'll try it in lots of different places." Others are skeptical though. "I don't how you'd ever find enough ribbed mussels to make much of a difference.," said Ray Grizzle, a professor of Marine Sciences at the University of New Hampshire. Still, the city is set to give it a try next spring.Housing:The Mayor is planning on converting old warehouses to lofts, and rebuilding outdated supermarkets and libraries so that they include housing above them. A spokesman for the department of Housing Preservation and Development said sites are still being looked at, but did point out that a parking lot in Astoria had been, as if kissed by a princess, turned into housing for seniors, and several other asphalt-to-hearth projects are also underway.