Rubuta ci gaba don wannan sakin layi - Yawancin waɗannan tambayoyin an sake bincika su a cikin 1986 bayan binciken binciken da ake zargi da irin wannan babban gazawar na Teton Dam na Ofishin Maidowa a watan Yunin 1976, da kuma kusan gazawar Ma'aikatar Ruwa da Wutar Lantarki na Lower Van Norman Dam a cikin girgizar kasa ta 1971 San Fernando
Ka yi haƙuri. Farfesa Ronald Scott na Caltech, wanda ya halarci binciken Casagrande, ya lura a taron 1987 na ci gaba a kan Baldwin Hills cewa Casagrande ya yi watsi da ko bai san motsin ƙasa ba a fili ba dangane da tafkin (misali waɗanda ke Stocker-LaBrea) a cikin bincikensa. Wani injiniya, Stanley Wilson - wanda kuma ya yi aiki tare da Casagrande a kan binciken 1972 kuma ya goyi bayan da'awar cewa rushewar man fetur ya kasance wani abu mai mahimmanci - yanzu ya yarda cewa irin wannan ƙaddamarwa na ƙasa ya shimfiɗa sosai a waje da yankin tafkin, musamman a cikin yankin Stocker-LaBrea, don haka ba za a iya danganta tafkin da sauran ƙungiyoyin lalacewa ga tafkin kanta ba - ta haka ne ta hanyar ba da alhakin alhakin gazawar ayyukan man fetur. Saboda haka, ra'ayoyin game da rawar da ake yi a cikin filin mai da kuma sake sakewa ya bayyana ya zama daidai.