This project example is one of our urban channel design capabilities. Spencer Creek Tributary was a rapidly eroding, urban stream located in St. Peters, Missouri. Advancing bank erosion, driven by systemic channel incision and widening, threatened residential property and infrastructure, including a sanitary sewer line crossing in the channel bed.


Intuition & Logic designed channel stabilization for approximately 1,500 feet of degraded tributary.  Stabilization measures included rock grade controls to halt channel incision, rock toes to deflect scouring flow, as well as regrading, fabric, and planting streambanks to achieve a stable channel cross section.


At the upper end of the project reach, a boulder drop structure was designed to protect the threatened sanitary crossing.  In addition, the lower 500 feet of the tributary was restored to a natural, meandering planform, based on stable geomorphic relationships.