The Fairfax County Board of Supervisors approved plans yesterday to hire a project manager to expedite completion of the Springfield bypass, the long-awaited, much-discussed 33-mile highway that would traverse the county.

The proposal was made by Supervisor Martha V. Pennino (D-Centreville), who complained that the road project was taking too long and said a "czar project manager" was needed to make sure the job gets done. The supervisors, who are all up for reelection, approved the recommendation unanimously.

"We're all out there campaigning and people want to know, we voted for this, we don't see any result," said Pennino. "It begins to appear like there is a lot of talk and no action."

The Springfield bypass is widely viewed as a major first step toward easing some of Northern Virginia's worst traffic congestion. Two segments of the bypass were financed as part of a $135 million bond referendum in 1985, and the largest chunk for which money is available is in Pennino's Centreville District, between Rte. 50 and the Dulles Toll Road.

Pennino said the project manager should work on an 18-month contract with the county, with a salary that might range from $85,000 to $100,000.

"We need someone who is such an expert. {The county} is going to have to pay through the nose," Pennino said. She said the county needed "someone who can ride herd and is able to get the road built."

The board directed Fairfax County Executive J. Hamilton Lambert to hire a project manager, who will work under his direction. Lambert said he would meet with the county staff to work on the particulars.

Lambert had proposed setting up a county position for the project coordinator job, with the individual working out of the county's transportation office. But Pennino said she preferred the consultant idea. "Our transportation staff is so overworked and has so many issues, they haven't got the time to give their full attention to it," she said.

The board also moved yesterday to ease the water pressure problem in the Tysons Corner area by approving the construction of a partly buried water pumping and storage facility.

The facility, which will hold five million gallons of water, will be built on 2.45 acres in the midst of a residential development on International Drive. Tennis courts will be built on top of the structure for the use of nearby residents.

In another matter, Board Chairman John F. Herrity said yesterday that he plans to meet with D.C. Mayor Marion Barry on Friday to discuss proposals for a stadium for the Washington Redskins.

Herrity said the meeting was requested by Redskins owner Jack Kent Cooke.

"We're going to try to find out what the District is doing and how we can help," Herrity said. "We want to make sure the stadium is built somewhere in the region."

Lambert said Fairfax had worked with the District before on regional issues such as transportation, water and jobs.

He cited alternative or creative financing as one area in which the county might be helpful. Fairfax recently developed one of the largest public-private joint ventures in the country with its proposed government center.

"We are extending to the mayor, if he so desires, our assistance in keeping the stadium within the nation's capital," Lambert said.

On a related subject, Barry is sponsoring a luncheon today for about 200 business and public officials who have helped District workers find jobs in the suburbs.

Officials from Fairfax, Arlington and Alexandria are expected to attend.

There have been 6,292 District residents placed in suburban jobs from July 1985 to June 1987, according to D.C. figures.

The District residents were referred to jobs primarily in retail sales, food services, hotel, clerical, manufacturing and construction.

"It's been successful but there is always room for improvement," Lambert said.