The West Branch at Coatesville
The National Weather Service gauge on the West Branch at Coatesville, listed as COTP1, uses these categories: action at 6 feet, minor flooding at 7, moderate at 9 and major at 11. Its highest recorded crests:
- 12.3 feet on August 9, 1942
- 10.08 feet on June 29, 1973
- 9.92 feet on June 22, 1972, during Agnes
- 9.62 feet on September 1, 2021, during the remnants of Ida
- 8.98 feet on January 19, 1996
Source: NWS gauge COTP1.
Downstream at Modena, the NWS gauge MODP1 recorded its own record of 13.38 feet on September 2, 2021, above the 12.47 feet of 1973. The West Branch below the city carries water from the whole upper valley, and Modena shows that clearly.
How Coatesville properties flood
Low ground beside the West Branch
The industrial core and older rowhouse blocks nearest the creek are where creek water arrives first. Lower levels there can take water through walls, floor drains and doors.
Water running off the hills
Much of the city climbs steep ground on both sides of the valley. In an intense storm, water runs down the streets toward the creek, and homes in the path, especially those with basement doors or garages facing downhill, take it in. That can happen even when the West Branch stays below flood stage.
Old housing stock
Many Coatesville homes are older brick and frame rowhouses and twins with stone or brick foundations and shared walls. A flood in one basement often reaches the next. Owners in attached homes should talk to neighbors early so cleanup and drying are coordinated; drying one side of a shared wall while the other side stays wet does not work well.
Business Route 30 and the roads
Business Route 30, the old Lincoln Highway, runs through the city near the creek. Upstream at Downingtown, the NWS lists Business 30 flooding at 11 feet and Routes 30 and 322 closing at 13 feet on the East Branch gauge. Around Coatesville, low crossings and underpasses on and near the West Branch can fill fast in a storm. The NWS warns that 12 inches of rushing water can carry away most cars. The Route 30 floodwater post explains why turning around is the right move.
Crawl spaces and additions
Coatesville has many homes with partial basements and crawl-space additions. Floodwater under a house is easy to ignore because nobody sees it, but it soaks insulation, wets the subfloor and raises humidity in the rooms above. See floodwater in a crawl space.
A checklist for the first day
- Watch the COTP1 and MODP1 gauge pages for the crest and the forecast fall.
- Keep power off in any flooded basement until it is checked.
- In attached homes, tell neighbors what you found on your side of the shared wall.
- Photograph the waterline, the furnace, the water heater and every item you discard.
- Call your insurer and write down the claim number and the adjuster's name.
What restoration involves
After the water drops and power is safe: pump-out, silt removal, photographing and removing wet materials, cleaning, drying to readings and a file for the claim. In rowhouses, expect the provider to check shared walls and to ask about the neighbor's side. The full order of work is on the flood damage restoration page.
Cost
For a single Coatesville rowhouse basement, pump-out and drying commonly falls between $750 and $4,000. Shared walls, crawl-space additions and finished rooms widen the scope toward $1,300 to $5,500, and a deep or sewage-contaminated flood can top $10,000. Read who pays for the flood cut and the cost guide.
Services in Coatesville
Flood damage restoration · Flooded basement cleanup · Sump pump failure cleanup · Storm and creek flood cleanup · Flood insurance claim documentation · Water removal and drying
Nearby towns
Downingtown is east on the other branch, and West Chester is to the southeast. All service areas.
Request help
Call (484) 275-9544 at any hour or use the form above, and mention whether your home shares a wall with a neighbor.