Sunday's historic storm put the new McKinley Water Vault to the test: How well did it work?

Sunday's historic rainfall across Sacramento put a new underground reservoir in McKinley Park to the test. The highly contested McKinley Water Vault was built by the city to help reduce flooding in Sacramento's McKinley Park neighborhood. The City of Sacramento's Department of Utilities said the 6-million gallon vault was full by 5:30 in the evening Sunday during the storm. The neighborhood around McKinley Park experienced street flooding when water began overflowing from out of the storm drains. By 9:40 p.m., the vault began to empty. As of Tuesday evening, pumps had reduced the water level inside the vault to about eight feet of water. The city says the vault is 18 feet at its deepest point and expects the vault to be nearly empty of water by Wednesday.