I was carrying groceries from the truck when Tom Archer appeared at the end of my driveway with one of the flyers folded in his hand. He was sixty-three, a retired firefighter with shoulders that made his old blue work shirts look permanently stretched. Tom lived two houses down from me and had once helped Emma retrieve a bicycle wheel from a ditch without making her feel foolish about the fall.
"You seen this nonsense?" he asked.
"I got one in my mailbox."
"Brenda's been doing this since before you arrived. She fined the Hendersons over a basketball hoop that had been there for six years. She tried to make the Parkers move a garden hose because it was visible from the road on a Tuesday." He unfolded the flyer. "But this one's worse. She's telling people your wall flooded our crawl space."
I looked up from the grocery bags. "Your crawl space flooded?"
"Last spring. And the spring before that. And three other times in between. Your wall wasn't even built when it started."
For the first time, another piece moved into place. I asked Tom whether any of the neighboring houses had been flooded before the trench appeared. He gave me a look that said I had asked whether rain was wet.
He led me to his garage and showed me a plastic tub full of photographs and receipts. There were invoices for damaged insulation, dehumidifiers, a foundation contractor, and a replacement sump pump. His wife had written dates on the backs of the photographs. One showed muddy water beneath their joists in a spring storm four years before I moved to Brierstone Ridge.
"Brenda told us our gutters were overflowing," Tom said. "Then she told us our downspouts were too short. Then she said we should hire a foundation company. Every time it happened, she had a new reason that somehow had nothing to do with the common drainage system."
"How much have you spent?"
"More than eleven thousand, and that's the part I can prove. What do you think?"
I spread the older photographs across his workbench. The flood lines and dates corresponded to periods of heavy rainfall, but the damage extended beyond what ordinary roof drainage should have caused. I recognized the outline of a common hydraulic problem, something affecting multiple receiving lots rather than a single foundation defect.
"I think we need to look at the entire subdivision," I said.
Tom watched me for a moment. "You mean not just your trench?"
"Not just my trench."
That evening I pulled up the county's topographic data and placed it over the plans I had downloaded before buying our house. I marked every property Tom had mentioned and added dates of reported flooding from his records. The pattern ran along the low side of the development, where the original design was supposed to collect and carry water away. Instead, the water seemed to be finding its own way through yards, crawl spaces, and basement walls.
I started with the retention pond. Its documented volume was approximately fifteen percent lower than the amount I calculated from the current drainage area and impervious coverage, assuming the design storm specified in the approval documents. That alone might not explain every flood, but it reduced the margin for error. I checked the outlet next and found a discrepancy between the approved drawing and later as-built information.