DS1015B(4)Standardmanhole-TypeK (withoutdesiltingopening) DS1016B(4)Standardmanhole-TypeK/D (withdesiltingopening) DS1017B(4)Standardmanhole-TypeL (withdesiltingopening) DS1018B(1)Backdropmanhole-Type1 DS1019C(2)Backdropmanhole-Type2