https://www.eia.gov/dnav/pet/pet_stoc_wstk_dcu_YCUOK_w.htm https://www.eia.gov/dnav/pet/pet_stoc_wstk_dcu_YCUOK_w.htm is relevant (but doesn't show the actual c

https://www.eia.gov/dnav/pet/pet_stoc_wstk_dcu_YCUOK_w.htm https://www.eia.gov/dnav/pet/pet_stoc_wstk_dcu_YCUOK_w.htm is relevant (but doesn't show the actual capacity limits). https://www.eia.gov/petroleum/storagecapacity/ https://www.eia.gov/petroleum/storagecapacity/ mentions the actual capacity limits from last September. It sounds like Cushing, Oklahoma, had 76,093 thousand barrels of total storage and 59,641 of them were used last week. But that's been increasing sharply and might be much closer to the total right now. 59,641 thousand barrels isn't the highest amount that's ever been stored there, but it's getting close: https://www.eia.gov/dnav/pet/hist/LeafHandler.ashx?n=PET&s=W_EPC0_SAX_YCUOK_MBBL&f=W https://www.eia.gov/dnav/pet/hist/LeafHandler.ashx?n=PET&s=W... I don't know how to get more current data, but I just found this through some web searches, so I bet there's much more information available.