by John Marshall Harlan, District of Columbia v. Woodbury…
“ If its duty has been fully performed in regard to any particular street, and that street has been put in good condition, safe against all accidents that could be foreseen and provided for, and afterwards, by some casualty, it falls into dilapidation and becomes dangerous,-as, for instance, by the caving in of a sewer,-and then an accident happens, the rule is that the District government is not responsible for the injury that results unless it had timely notice of the dangerous condition of the street, so that it could be put in repair and the danger obviated. ”
