OutdoorNebraska

Floating The Good Life • Nebraska Game and Parks Commission 39 Materials for shoreline landings are similar to ramp launches in durable materials that can withstand river flows and allow machinery to be used to clear sediment. In addition to surface materials, shoreline landings consist of vertical faces along the front and sides until it ties back to the existing embankment. Vertical face materials may be a continuation of the same scour prevention armoring depending on the waterbody characteristics and requirements determined by the engineer. Material alternatives for vertical faces include: Sheet Piling: Sheet piling are a series of long, narrow steel sheets manufactured as a corrugated bent shape that are then mechanically driven into the ground in an interlocking series of piles to form a continuous retaining wall. Sheet piling can be fabricated in various lengths as necessary to bury below calculated scour potential depth and extend above the surface to the desired elevation of the landing. A formed and poured concrete cap is constructed to conceal the top edge of the piling and serve as the finished surface face of the landing's leading edge. Sheet piling is an expensive process and requires heavy equipment to install. It should be an option typically reserved for constructing launches along riverbanks with a high degree of scouring potential. Poured Concrete: Poured concrete forming the face of the landing is a durable and relatively cost-effective alternative for lake or river shorelines that are stable and have low probability for scouring. Constructing poured concrete walls below water elevations requires the same de-watering construction costs previously referenced in the ramp approach and launch application. A professional consulting engineer should design the depth, thickness, and reinforcement of the landing face. Stone riprap material is recommended to place along the face of the concrete landing at the bottom of the embankment to stabilize soils against erosion which can lead to compromising the integrity of the wall. Precast Block: Large precast retaining wall blocks are similar to conventional retaining wall blocks but at a size and weight that requires mechanical equipment to move into place and set. Large block is suitable for use in applications similar to poured concrete under conditions of lake or gentle river flows within stable channels of low scour potential. If precast retaining wall block is considered as an alternative for the shoreline launch, only select a manufacturer that specifically includes lake and river applications for its product. KAYAKING AT LAKE WANAHOO STATE RECREATION AREA KAYAKING ON LOGAN CREEK

• Cover