Balancing Stream Restoration with Floodplain Ordinances

Alex C. Lucado , PE, CFM, Project Manager, Timmons Group

Katie E. Atkinson, EIT, Project Engineer, Timmons Group

As streams incise and erode, their vital interaction with the abandoned floodplain, or terrace, continues to decrease. This not only flushes excess sediment and pollutants downstream but separates the floodplain ecosystem from its source of life: the stream. Reconnecting the stream to a floodplain is critical for a successful restoration and has been incentivized through the Protocol 3 nutrient and sediment reduction crediting mechanism.

 

However, the goals of local and federal floodplain ordinances can contrast with those of the restoration community. Reversing erosive damage by raising streambeds can often lead to increases in water surface elevations during storm flow events. This presentation will focus on how to balance these two ideologies throughout the design and construction of stream restoration projects.


Author Bio

Alex Lucado is a Project Manager and Certified Floodplain Manager with Timmons Group. He has 8 years of experience in the field of stormwater engineering with primary responsibilities that include stream restoration design, storm sewer and BMP design, hydrologic and hydraulic analysis, dam inspections, dam failure modeling, inundation mapping and floodplain study preparation.

Katie Atkinson is a Project Engineer with Timmons Group. She has 4 years of experience in the field of stormwater engineering with primary responsibilities that include stream restoration design, storm sewer design, BMP design, hydrologic, and hydraulic analysis.