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- W153304290 abstract "This paper presents guidance for constructing stream simulation structures capable of passing most aquatic organisms, amphibian and some terrestrial species. In order to stimulate a stream the structure must have been designed to fit well with and have minimal impact on stream dynamics and processes. Traditional construction methods are used for both embedded pipe and open bottom arch construction. In chronological order, the primary structure construction steps include meetings, surveys, traffic controls, dewatering, erosion control, clearing, excavation, foundations, bedding, pipe assembly, backfill and embankments, and re-watering. The single most important and unique detail to stream simulation structures is the simulated streambed inside the embedded pipe or open bottom arch. The bed is typically shaped to have a low water channel, margins, and banks and may include other large rocks added to simulate streambed roughness, stable banks and step pool. Bed construction requires unique effort and a combination of machinery and skilled hand labor to fit and arrange pieces to match the design interlock well and be durable. Protection of the aquatic environment is emphasized through minimizing turbidity and sedimentation. Additional aquatic organism protection can include collection and transport of species from the dewatered area, slow re-watering to avoid stranding, limiting toxic substances and noise, and reducing blasting effects. Communication among designers and contract administrators is emphasized to improve understanding of design objectives, maintaining a feedback loop to address site problems and transferring wisdom gained from the project's construction. Construction of stream simulation projects requires good design coupled with skilled contract administration and the cooperation of the contractor. Some semi-skilled hand labor is necessary for construction of the streambed features most valuable to the project. Protection of aquatic habitat and species can be a major emphasis and potentially troublesome task during a project. Good communication between designers, contractors, and contract administrators is necessary to make appropriate changes within the scope and objectives of the project. Projects that are not constructed as designed often suffer the consequences. Through the continued open communication of designers, contract administrators and contractors, project designs and contract details can be refined, wisdom can be shared and future project planning can be improved to aid future projects." @default.
- W153304290 created "2016-06-24" @default.
- W153304290 creator A5003698305 @default.
- W153304290 date "2003-08-24" @default.
- W153304290 modified "2023-09-27" @default.
- W153304290 title "DESIGN AND CONSTRUCTION OF AQUATIC ORGANISM PASSAGE AT ROAD-STREAM CROSSINGS: CONSTRUCTION CHALLENGES AND CASE STUDIES OF STREAM SIMULATION STRUCTURES FOR AQUATIC ORGANISM PASSAGE" @default.
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