|Cars trapped in flooded streets four blocks from my house. The drivers needed to be rescued. |
We had another torrential rainstorm in the Washington, DC this afternoon. We got 4.8 inches in Alexandria in about an hour, but other regions got up to 6 inches. The website has a good summary of the storm.
I am happy to report that my new drainage and sump system worked to keep our basement dry. The two pumps in the main sump were running continuously. After about 45 minutes the incoming water started to exceed the pumping capacity of the two pumps in the first sump, but the back up sump did its job and started pumping the excess. The back up never got near capacity, meaning we do have some excess capacity remaining in the back up sump. The water level in the back up sump never got high enough to trigger pump 4 or 5, which is the water powered back-up.