CHARLES COUNTYThousands of Fish Wash Up on Potomac's Shore Thousands of dead fish have washed up along the Potomac River near Swan Point, at the southern end of Charles County, a spokesman for the Maryland Department of the Environment said yesterday. Robert Ballinger said the fish, including many small white perch, were reported Sunday and were found along shoreline downstream from the Route 301 bridge, across the river from Colonial Beach, Va.

Ballinger said state officials had not determined how many fish have died or what killed them.

Ed Merrifield, an environmentalist whose title is Potomac river keeper, said it might be that a large fishing net had been trapped underwater by ice, eventually killing the fish inside.

-- David A. FahrentholdANNE ARUNDEL COUNTYWoman Who Was Killed by Car Is IdentifiedThe woman killed by a car in the Glen Burnie area Friday was identified by Anne Arundel County police yesterday as Mary Lou Shifflett. She was walking across Ritchie Highway near Jumpers Hole Road when she was struck by a car driven by Jose Santos Toledo, 20, of Bladensburg, police said in a statement. A second vehicle might have struck her afterward, police said.

Police said that Toledo "was charged with multiple offenses . . . including leaving the scene of a fatal motor vehicle crash."

-- Raymond McCaffreyMONTGOMERY BUDGETCounty Reaches Deal With Workers Unions Montgomery County Executive Isiah Leggett (D) said yesterday that his administration has agreed with two employee unions on three-year contracts that provide annual raises of at least 4 percent. If their contract gets county council approval, the nearly 7,000 general government workers represented by United Food and Commercial Workers Local 1994 will receive raises of 4 percent the first year and 4.5 percent in each of the following years of the contract, which begins July 1.

Negotiators could not immediately agree on health-care and retirement benefits and decided to return to the table in September.

In a separate agreement with Fraternal Order of Police Lodge 35, the county's 1,158 officers would receive 4 percent raises in the first two years of the contract and a 4.25 percent boost in the third year.

The agreement increases the starting salary for officers to $45,165 and includes provisions to put video cameras in police cars.

-- Ann E. MarimowGERMANTOWN AREA CRASH12-Year-Old Boy Is Critically InjuredA 12-year-old boy was critically injured last night in a collision in the Germantown area of Montgomery County, county police said. They said the collision occurred shortly after 8 p.m. at Route 118 and Dawson Farm Road.

-- Clarence Williams and Martin Weil