Oakland Terrace, Maybrook Avenue, Assessment plan, n.d., 1-6-15

Oakmont Avenue, Shady Grove Road, Gaitherburg, Maryland Route 355 to Route 115, relocation, 1969-1975, 5-5-10

Oakridge: Clarksburg Road, Top Ridge and Ridgeoak Drives, Schroeder Property, 1961, 3-1-11

Oaks Landfill, Historic area work permits, 1980, 1-1-15

Oaks Landfill, Laytonsville, Well and sample station inventory, Site S-55B, 1978, 3-1-16

Oaks II Landfill, 1977-1982, 1-1-22

Oakview, Dilston Road, Grade establishment, Block 33, paving plan and profile, 1959, 3-3-15

Oakview, Dilston Road, Sewer extension, storm drainage, paving plan and profile, 1961, 3-3-15

Oakwood Knolls, Elmore Lane, Grade establishment, 1965, 4-5-11

Ocala Street, Assessment map and plan profile, 1951, 1-3-13

Ocala Street, Indian Spring Terrace and Hills, Franklin Avenue to Station 3+65, 1962, 4-2-10

Old Bladensburg Road, Plan, 1950, 1-4-8

Oldchester Road, 1952, 1955, 1-5-6

Oldchester Road, Assessment map, 1952, 1-5-3

Oldchester Road, Final completion map, 1950, 1-3-4

Old Farm, Hitching Post Lane, Farmland Drive to Plantation Lane, 1965, 6-3-2

Old Farm, Old Gate Road, Farmland Drive, Tilden Lane, Magruder Lane, Storm drain plan, 1962, 4-2-12

Old Farm, Old Gate Road, Farmland Drive, Tilden Lane, Storm drain plan, paving plan, 1962, 4-2-12

Old Gate Road, Old Farm, Storm drain plan, paving plan, 1962,

4-2-12

Old Georgetown Road, 1957, 1-6-8

Old Georgetown Road, Dedication plats, storm drains, grade establishment, 1954-1959, 1-8-15

Old Georgetown Road, I-70S to MD Route 355, 1965, 5-1-7

Old Georgetown Road, Route 187, Glenwood Road to Beech Avenue, 1965, 5-3-2

Old Georgetown Road, Woodmont Triangle, Storm drainage map, n.d., 1-4-20

Olney, Bowie Mill Road, Dedication plats 2, 3, 4, 5, 6, 1958,

1-2-3

Olney, Highlands of Olney, Storm drainage and paving plan, 1971, 1972, 6-2-13

Olney, Land use plan, 1966, 2-1-7

Olney, Master plan, proposed land use, proposed zoning, 1980,

6-4-15

Olney, Master plan, Sandy Spring/Ashton, proposed land use, proposed zoning, 1980, 6-4-16

Olney, Miscellaneous smaller maps, 1979, 2-1-6

Olney, Proposed highways, 1979, 2-1-6

Olney, Proposed highways, 1980-1981, 2-1-5

Olney, Proposed land use, 1979, 2-1-6

Olney, Proposed land use, 1980-1981, 2-1-5

Olney, Proposed zoning, 1979, 2-1-6

Olney, Proposed zoning, 1980-1981, 2-1-5

Olney, Sketch plan, 1965, 2-1-8

Olney, Topographical survey of a tract of land called "Charles and Benjamin", 1960, 3-4-5

Olney, Zoning and highway plan, 1966, 2-1-7

Olney and vicinity, Land use plan, 1965, 6-4-4

Olney and vicinity, Zoning and highway plan, n.d., 6-4-4

Oneida Lane, Sonoma Subdivision, Bethesda, Grade establishment, storm drainage and paving plan, 1972, 6-1-11

Onondaga Road, Assessment plans, n.d., 1-7-4

Orebaugh Avenue, n.d., 1-1-4

Outer beltway, Environmental impact evaluation of alternate alignments, 1971-1976, 2-3-5

Outer beltway, Preliminary study of Potomac River crossing for outer circumferential freeway, 1969, 2-3-11

Outer beltway amendment, Highway general plan and master plan,

c. 1973, 2-4-15

Overhill Road, York Lane to Lambeth Road, Plans, 1954, 1-7-5

"Overplus," River Road, Darnestown District, 1949, 1-5-18