You guys with basements etc. with sump pumps. Question for you. My Mom has a water problem caused by runoff from a large car dealer that paved over 5 acres of trees and dirt and replaced that with asphalt about 20 years ago. When ever they get large storms with 5-10" of rain the water flows off the lot and through the neighbors yard and then into my Mom's yard where it is hitting the side/front of the house and flooding the landscape around the front /side of the house before then heading down the driveway and into the street. We could sue I suppose and try and force them to do something about the water drainage but this is a huge dealer with many locations in San Antonio with deep pockets. We got a quote from a landscape company skilled in putting in French drains etc. ($4-5K) They propose a system that uses not only a French drain but also catch basins with a sump pump that would pump the water ultimately to a pipe that runs to the street. My mom lives at the top of a cul-de-sac on a hill so the water would run down the street and into a creek bed ultimately. They also quoted a passive drain system that would drain the water via gravity around the house and in the backyard where it would drain downhill through all the neighbors yards. This might work well but I fear a lawsuit from a neighbor should this cause flooding in a house along the way. Since my mom is elderly I need something that works and works without issues. If the power goes out durning a heavy down pour the pump won't work. While this doesn't happen every time it rains they do lose power on occasion durning heavy downpours for up to an hour. How do you keep a sump pump running during a power outage? I thought about a UPS system but worry you would need a $500 system to run the pump which is 4/10HP and uses 8.5 AMPS/850W. Then you worry about the UPS system actually working if the battery is old. I see they make sump pumps that use water to run the pump. Does anyone have something like this? The main water line to the house runs from the street to the house in the front of the house so it could be tied into and a line run over to the side of the house where the catch basins are to be installed. Any thoughts appreciated on the subject!