Laserfiche WebLink
<br />e <br /> <br />e <br /> <br />e <br /> <br />DRAINAGE CRITERIA MANUAL (V. 2) <br /> <br />HYDRAULIC STRUCTURES <br /> <br />Thus, managing energy involves understanding and managing the total energy grade line of flowing <br />water. <br /> <br />1.11 Maintenance <br /> <br />Urban drainage facilities should not be buill if they cannot be properly maintained on a long-term basis. <br />This means that suitable access must be provided, a maintenance plan must be developed and funded, <br />and the drainage facilities must be maintained in accordance with public works standards. <br /> <br />1.12 Structure Safety and Aesthetics <br /> <br />The design of structures must consider safety of flood control workers and the general public, especially <br /> <br />when multiple uses are intended. Regulations and interpretations vary from community to community and <br /> <br />may change with time. There are some inherent safety risks in any waterway that have to be recognized <br /> <br />by the public, designers, and government officials. General suggestions are given in regard to safety; <br /> <br />however, the designer must use a reasonable standard of care for the particular structure being designed <br /> <br />or retrofitted that includes evaluation of present or likely future public access and uses such as recreation. <br /> <br />The designer should give special consideration to structures located in waterways where boating is likely <br /> <br />to occur. These structures need to be designed to avoid known hazards, such as reverse rollers <br /> <br />(Leutheusser and Birk 1991). often referred to by some as "keepers." <br /> <br />Aesthetic appearance of structures in urban areas is also important. Structures can be designed with <br />various configurations, different materials, and incorporation of adjacent landscaping to produce a <br />pleasing appearance and good hydraulic function and to enhance the environmental and ecological <br />character of the channel and floodplain. The incorporation of wetland vegetation, native grasses, and <br />shrubs into the design adds to their aesthetics and provides erosion control and water quality functions. <br /> <br /> <br />Photograph HS-3 <br /> <br />Stepped grouted sloping bouider drop structures such as in Denver's Bible Park can be safe <br />and aesthetic besides performing their primary hydraulic function of energy dissipation. <br /> <br />HS-5 <br /> <br />06/2001 <br />Urban Drainage & Flood Control District <br />