Sand Run Jogging Trail & Wall

Summit Metro Park contracted with DGL in 2022 to perform engineering and design services required for the replacement of nearly 1,700 feet of deteriorating timber retaining wall along the Jogging Trail at Sand Run Metro Park.

The scope of the project included geotechnical investigation, topographic survey, a wall type study, detailed design construction documents, and construction administration. The study and design solutions also needed to consider the adjacent roadway, drainage, existing structures, and natural resources such as wetlands and large mature trees. The following wall types were evaluated for feasibility, and preliminary cost estimates were developed for comparison.

• Soldier Piling with Concrete Lagging – HP10X42 piles embedded in 2.5 feet diameter drilled shafts with 8’ long x 18” high precast concrete lagging

• Sheet Piling – PZ22 Steel Sheet Piling

• Redi-Rock – 18” high blocks

• Soldier Piling with Concrete Lagging and CIP Facing - HP10X42 piles embedded in 2.5 feet diameter drilled shafts with 8’ long x 18” high precast concrete lagging with a cast-in-place facing

After considering cost, constructability, and environmental constraints of the referenced alternatives, Soldier Piling with Concrete Lagging was selected for a majority of the project length, with the exception of a short section at the far west end of the project where a sheet pile wall was installed. Along with the wall design, the plans also included new vertical and horizontal alignments to the trail, trail build-up, adjustments to the guardrail, drainage improvements, and embankment work in areas of slope failure where a wall is not needed.