Academic standards and enrollment numbers at the Baltimore City College (B.C.C.) after reaching a high of near 4,000 boys by the mid-1960s went through a period of decline first in the late 1960s to mid 1970s, with the rapid opening of newer additional high schools both in the outreaches of the city along with the rapidly expanding suburbs in surrounding Baltimore County. Two in the city system were Northwestern in 1965 and Northern in the following year. Three high schools were completed and opened all at one time in September 1971, with Southwestern, Walbrook and a massive huge complex nearby to City in Clifton Park on the bed of the old reservoir off Harford Road, Lake Clifton. The 'A' and 'B' courses were slowly dying out and unfortunately discontinued by 1973, and a single academic track was offered.