NV 18 F 11

495 exit 49 northbound 49A/C,  66W Centreville exit onto Sully Rd (28) bear R on exit ramp, stay straight (1st light rt. 29/211) go about 6 miles (SEE green water tower on R Manassas Park written on it) turn R to school immed after water tower - NOT R at the light, the next one 1/4 blk beyond intersection, slight hill obscures seeing school bldg when at intersection