Silver Lake Park in Prince William County does not normally have mudflats. They are a result of the current dam rehabilitation project. This project is noisy and makes the park less enjoyable. The upside is that the mudflats are attracting Killdeer and it may also attract other wading birds.
Killdeer can be easily spotted with binoculars from the first parking lot right after you enter the park.
The Silver Lake dam is expected to be completed in June 2016. The lake was partially drained to construct needed control structures and provide additional storage to prevent flooding.