Project Overview
When the Ivy Trails Homeowners Association noticed severe erosion along a section of Dry Run Creek threatening a nearby path and community infrastructure, they turned to DIY Retaining Wall, LLC for an engineered stabilization solution.
What began as a straightforward retaining wall design quickly evolved into a complex, multi-agency approval process involving the U.S. Army Corps of Engineers, Ohio EPA, the Ohio Department of Natural Resources (ODNR), and Hamilton County Soil and Water Conservation District.
Before Construction
The existing creek bank was actively eroding, with the waterway undercutting several feet into the slope and carrying sediment downstream. The site’s proximity to Dry Run Creek — a tributary of the Little Miami River, a federally protected waterway — meant that even modest stabilization work required review by multiple agencies.
Permitting and Coordination Challenges
The engineering itself was relatively straightforward. The real challenge came from the complex permitting landscape that governs projects near waterways.
DIY Retaining Wall worked through:
- U.S. Army Corps of Engineers Nationwide Permit 13 (Bank Stabilization) authorization for discharge into Waters of the U.S.
- Ohio EPA Director’s Authorization for a 401 Water Quality Certification.
- ODNR Environmental Review, addressing potential habitat impacts for endangered species such as the Indiana bat and various mussel species.
- Hamilton County Earthwork and Geotechnical Permitting, requiring site-specific observation and approval by a licensed Ohio geotechnical engineer.
Each agency required unique documentation, coordination, and timing — from QHEI flow charts to USGS stream tracing and endangered species reviews.
While the design phase moved quickly, the regulatory approval process extended the timeline significantly. As a result, the project became an invaluable learning experience in environmental compliance and interagency collaboration.
Engineering Design Details
To ensure long-term stability and resilience, the design included several advanced engineering features:
- 12-inch embedment of the wall footing below the stream bed to prevent undercutting.
- Fabric-wrapped leveling pad to prevent migration of fine materials.
- Riprap apron in front of the wall to resist scour and absorb hydraulic energy.
- Open-graded #57 stone reinforced backfill to eliminate drawdown forces from water fluctuations.
- World Block V-Interlock large-block retaining wall system, known for weight and durability.
- Recycled concrete blocks, cast using leftover concrete from daily operations, reducing the project’s overall carbon footprint.
The wall design, up to 10 feet of height, successfully stabilized 185 linear feet of creek bank and provided long-term protection for the HOA’s infrastructure.
Construction and Completion
Construction proceeded under dry conditions to limit sediment transport. The reinforced wall and riprap apron now provide both functional erosion control and a natural appearance compatible with the surrounding environment.
After final inspection and certification from the Army Corps and Hamilton County, the project received full regulatory approval. The repaired streambank now stands as a model of sustainable design and compliance-driven execution.
Lessons Learned
Even with a simple wall design, projects adjacent to waterways can be slowed by the need for interagency coordination. Each regulatory layer — local, state, and federal — has its own purpose, and success depends on understanding and respecting those requirements early in the design process.
As project engineer Matt Parrish reflected:
“The retaining wall design was the easy part. The challenge was managing the documentation and coordination with multiple agencies — each with their own review criteria and environmental priorities. It was a great learning experience in patience, precision, and persistence.”
Project Results
- Completed: October 30, 2025
- Stabilized Length: ~185 linear feet
- Agencies Involved: U.S. Army Corps, Ohio EPA, ODNR, Hamilton County SWCD
- Outcome: Fully approved and built retaining wall providing long-term bank stabilization and environmental protection
Sustainability Impact
By reusing concrete materials for block fabrication and incorporating open-graded drainage design, the project not only reduced its environmental impact but also enhanced resilience against future storm events.
Conclusion
The Ivy Trails HOA Creek Erosion project demonstrates that even modest retaining wall projects can demand major coordination when located near waterways. Through detailed engineering, environmental awareness, and persistent communication with regulatory agencies, DIY Retaining Wall successfully delivered a solution that protects both property and habitat.
If your property or community faces similar erosion or streambank issues, our team can help you navigate both the engineering design and permitting process — saving you time, money, and frustration.
Learn more about our engineering services at www.diyretainingwall.com/services.