What Garvin Brook Did In 2007
Stockton sits in the Garvin Brook valley, and on 18 and 19 August 2007 that creek became the most destructive thing in Winona County.
The record is specific. A Stockton home was swept off its foundation and deposited on the railroad tracks along County Road 23, with the owners sheltering inside and then on the roof. Railroad tracks through town were lifted clean off the ground. Main Street was buried in mud. John and Shirley Micheel died when their car was overtaken by Garvin Brook near Stockton. County authorities evacuated the community.
This is not history for its own sake. It is the clearest available demonstration of what a bluff country creek does when the uplands above it cannot absorb any more rain.
Why Flash Flooding Behaves This Way Here
In southeastern Minnesota roughly 7.75 inches of rain in 24 hours is considered a 100 year storm. In August 2007 parts of Winona County took far more than that, with 36 hour totals in the region exceeding 14 inches and a Minnesota Department of Transportation gauge at Ridgeway near I-90 measuring 23.1 inches in the first 24 hours.
Once upland soil is saturated it stops absorbing entirely. Everything that falls after that point runs off, concentrates in the valleys, and arrives in the creek bottom communities with almost no warning. Garvin Brook goes from a stream you could step across to something that relocates buildings.
The Difference Between Flood And Water Damage
Homeowners use the words interchangeably. Insurers and restoration contractors do not.
- Creek flooding is surface water. It is contaminated, it is excluded from standard homeowners policies, and it requires material removal rather than drying.
- A burst supply line is sudden accidental discharge. It is clean water, generally covered, and often dried in place.
- Groundwater through the slab is neither. Usually excluded, usually clean, usually dried in place.
- Septic or sewer backup is category three. Removal and treatment, and only covered with a specific endorsement.
Which one you had determines the scope, the cost and whether anyone pays for it besides you.
Preparing For The Next One
Nothing on a residential budget stops a creek that is moving houses. What does help is reducing what you lose. Keep valuables and mechanicals off the basement floor. Know where your main shutoff and panel are without needing a flashlight to find them. Keep a record of what is in the building.
Flood coverage through the National Flood Insurance Program is separate from your homeowners policy and has a waiting period before it takes effect, so it cannot be arranged once a storm is in the forecast. In a creek bottom community that is worth a conversation with your agent now rather than later.
What Our Response Looks Like
During an active event access into the valley may simply not exist, and we will tell you that plainly rather than guess. Once we can reach the property, the contractor treats creek water as contaminated regardless of appearance.
Extraction and removal of affected porous material come first, then cleaning and antimicrobial treatment, then structural drying with daily readings logged against a dry standard. Where a property sat wet for days, the work starts as mold remediation.
Call (507) 698-9249 for Stockton and the Garvin Brook valley.
