Nilles Associates served as Engineering consultant on the Prairie Trail development master planning team with the City of Ankeny, developer, and planners. A stream with a tributary area of 525 acres enters the Prairie Trail development from the north...
Runoff from large rain events in the spring of 2008 generated concerns among residents living adjacent to the North Creek stream channel corridor, in the northwest portion of the City of Ankeny. Nilles Associates was asked to complete a...
In partnership with the City of Johnston, Nilles Associates completed a citywide watershed assessment which included Beaver Creek, the Des Moines River and their smaller tributaries within the current and future growth areas of the City. Nilles reviewed dozens...
The Gray’s Lake Park shoreline restoration project was an effort to improve the stability and resilience of 2,000 feet of vulnerable shoreline at the eastern end of this iconic lake and trail system, visited by hundreds of thousands each...
A 1/2-mile stretch of degraded tributary ran through residential areas from Long Meadow Drive to NW 86th Street in Johnston, IA. Nilles Associates, Inc. conducted the survey, acquisition, planning, design, public participation, and administration of a multi-phase watershed improvement...