Why Lincoln basements get wet
Clay that holds water. Most Lincoln homes sit on loess with clay below. Clay soaks up water fast and lets it go slowly. USDA data shows the main clay soils here are often saturated within one to three feet of the surface in March and April. That means water sits against your wall for weeks, not hours.
Spring storms. Lincoln averages about 29 inches of rain a year, and the wettest months are May and June, according to University of Nebraska climate records. A spring storm on top of soil that is already wet is when most basements leak.
Backfill that settled. When a house is built, the soil dug out for the basement is pushed back against the wall. That loose fill settles for years. The yard next to the house sinks and starts to slope toward the wall, so rain runs right to it.
Downspouts and window wells. One downspout that empties beside the house can put hundreds of gallons against one spot of wall in a single storm. A window well with no drain fills like a bucket.
Older walls and joints. About 1 in 8 Lincoln homes was built in 1939 or earlier. Older block and early concrete walls have more joints, more cracks and less coating on the outside.
Low ground near creeks. The City of Lincoln lists Salt Creek, Antelope Creek, Beal Slough, Deadman's Run and other streams as flood sources. Homes on low ground near them tend to sit in wetter soil after big storms.