The Loudoun County Board of Supervisors has scheduled an $11.3 million bond referendum for November to expand the current landfill, but has opted not to put school construction and open space funding on the fall ballot.

At its July 3 meeting, the board voted to let voters decide Nov. 6 whether the county should issue general obligation bonds for construction of the third phase of the current landfill near Route 621 south of Leesburg.

The funds are not earmarked for the new landfill proposed for a site next to the current county dump. Loudoun officials are negotiating with the owners of about 25 properties whose land would be taken up by the proposed landfill.

The county School Board wants $44.1 million for a variety of construction projects, the most expensive being a $34 million high school in Ashburn. The supervisors decided last week to seek a bond sale through the Virginia Public School Authority instead of general obligation bonds.

Unlike general obligation bonds, Public School Authority bonds do not have to be approved in a voter referendum. Two county board members opposed the Public School Authority sale mechanism, arguing that the electorate should have the right to vote on the matter.

"Probably no question I have ever faced has caused me more agony than this one," said Supervisor Betsey Brown (D-Catoctin) in supporting a referendum.

She told school officials at last week's meeting, "If you make your case as well as you did today, I know {county voters} will support it."

Supervisor Thomas Dodson (D-) Mercer) cited the magnitude of the spending request in voting against the Public School Authority option, but five board members voted for it. "The question is not whether to build the school, it's how to build the school," said County Board Chairman Betty Tatum (D-Guilford).

The open space initiative was proposed recently by the county's Open Space Advisory Committee.

That panel asked the supervisors to schedule a $5 million bond referendum in November to protect sensitive natural areas in the county.

The committee said the areas would be kept as close to their natural state as possible, benefiting wildlife. They also might include hiking trails.

The money could be used to purchase easements on or title to areas with rare plants and/or animals, according to co-chairman Mouncey Ferguson.

He identified potential sites as Sugarland Run near the Potomac River in eastern Loudoun, Lucketts Meadow northeast of the northern Loudoun town, and part of Furnace Mountain near Point of Rocks, Md.

Citing time restraints in advertising a public hearing and meeting court deadlines for such a referendum, the supervisors voted unanimously to refer the matter to their Public Services Committee for consideration of a possible March 1991 special election.

Meanwhile, two additional referendum questions may get on the November ballot, neither involving bond sales.

The County Board or a citizen petition effort may seek voter approval of a plan to have the chairman of the Board of Supervisors elected countywide by the voters. Currently, board members choose the chairman from their ranks.

Another group of county residents hopes to get voter approval for parimutuel betting on horse races in Loudoun. The group is seeking local and state authority for such wagering at the Morven Park steeplechase races, held each fall near Leesburg. If passed, the referendum would permit a larger, permanent race track in Loudoun, if proposed by a private firm and authorized by the state Racing Commission.