The following were among actions taken at the Sept. 21 meeting of the Fairfax County Board of Supervisors. For more information, call 691-3187.

SPRINGFIELD BYPASS -- The board unanimously approved hiring an engineering consultant to speed completion of the 33-mile Springfield Bypass highway.

Board Vice Chairman Martha Pennino (D-Centreville) proposed hiring a consultant as project supervisor, saying "What we need is someone to concentrate on getting the Springfield Bypass built in 18 months. It can be done."

She accused state transportation officials of "foot dragging." She said little work had been done since county voters approved financing two segments of the route in 1985 as part of a $135 million bond issue, including a section in her own district between Rte. 50 and the Dulles Toll Road. Pennino estimated the county might have to pay a professional engineer $85,000 to $100,000 a year to push the project in Richmond.

County Executive J. Hamilton Lambert had suggested creating a position in the county's transportation office to oversee the project, but Pennino said she preferred using a consultant because the county office is "overworked."

REDSKINS STADIUM -- Two Board members went on record opposing any expenditure of Fairfax County public funds to construct a replacement for the Redskins' Robert F. Kennedy Stadium in the District.

"In my view public funds, at least Fairfax County public funds . . . , should not be spent on the stadium," said board Chairman John Herrity. Herrity is to meet Friday with D.C. Mayor Marion Barry to discuss helping the District build a new stadium. Herrity said he preferred building a new stadium on the present stadium's parking lot.

Pennino also opposed spending any Fairfax money on a stadium, and said she believed it belonged in the District. "I would just have one big fit if they tried to put it in Maryland . . . just as I know they would have one if they put it here," she said.

TYSONS CORNER WATER STORAGE -- In a move to relieve low water pressure in the Tysons Corner area, the Board unanimously approved a partly buried, five-million-gallon water pumping and storage facility on International Drive. Tennis courts are to be built above the facility, located in a residential development. Supervisor Audrey Moore (D-Annandale) complained the Board had missed earlier opportunities to build the facility at a nearby location for perhaps "one-fifth" the money, but voted for the plan along with Supervisors Herrity, Pennino, Nancy Falck (R-Dranesville), and Elaine McConnell (R-Springfield), with the other four members not in the room.

The $11 million facility should be finished in early 1990, according to County Water Department Director of Administration James Warfield. It is part of a $250 million, five-year project to expand the county's Potomac water treatment plant and increase water storage and pumping capacity county-wide, he said.

Most of the water from the Tysons Corner facility will go to the Annandale area, he said. The new water facility will not noticeably increase water pressure around Tysons Corner, where there occasionally has been a water pressure problem, but it will make more water available in emergencies, Warfield said.

PROPERTY TAX DEFERMENT -- The board directed staff to investigate allowing the elderly to defer paying property taxes arising from increased assessments on their homes. Taxes and interest would accumulate as liens and become due on the sale of the houses or at the death of the homeowners.

T. Farrell Egge (R-Mount Vernon), who introduced the plan, said the tax change would require approval of the state legislature and urged that the county request it as part of this fall's state legislative package.

Pennino warned that senior citizens had opposed such plans before, because they did not want to have liens on the property they passed to their heirs, but she said changing demographics warranted reconsidering such a deferment.