CITY OF DES MOINES SHORELINE MASTER PROGRAM

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Des Moines Shoreline Inventory and Characterization Segment B - Des Moines Marina Table 10 below summarizes the shoreline characterization for Segment B. Table 10. Shoreline Segment “B” Summary Land Use / Transportation Stream Discharges Public Shoreline Access Hazard Areas Habitat / Habitat Potential Public Facility: 54%, Vacant: 20%, Commercial: 12% Park: 10%; Marina Access, parking, and circulation None Des Moines Marina & fishing Pier Erosion Fish & Wildlife Areas (Salmonids, piscivorous birds, shellfish) All shoreline functions have been impaired by the construction of the marina, pier, breakwater, and associated facilities. Due to complete development of Segment B, there are no feasible opportunities for improving natural shoreline functions within this segment. Other opportunities are related more to improving pedestrian access to water-oriented uses that the marina provides. Informational kiosks could also be erected to educate the public on the importance of the nearshore area and coastal processes, what they can do to help preserve or improve what remains, and wildlife viewing opportunities that exist. These projects could be coordinated with projects in the Marina Master Plan that require mitigation. Additional opportunities are related to improvement of water quality in the marina, including development or refinement of operation Best Management Practices (BMPs) for handling of and storage of fuels, and other contaminants associated with boating. Page 42 March 2005
Des Moines Shoreline Inventory and Characterization Segment C - Zenith Table 11 below summarizes the shoreline characterization for Segment C. Table 11. Shoreline Segment “C” Summary Land Use / Transportation Stream Discharges Public Shoreline Access Hazard Areas Habitat / Habitat Potential Single-Family Res.: 88%, Multi-Family: 7%; Local streets Streams: Massey Creek and unnamed creek near S. 239th Street S. 239th Street Access Erosion, Flood Wetlands, Streams, Banks/Bluffs, Fish & Wildlife Areas (Forage Fish, Salmonids, seabird nesting, shorebirds and piscivorous birds, shellfish) Shoreline functions within Segment C have been impacted by the following activities: • Shoreline armoring including riprap (includes mouth of Massey Creek), concrete and wooden bulkheads; • Removal/loss of marine riparian vegetation; and • Increased impervious surface within the Massey Creek basin. Effects upon the nearshore environment include: • Sediment supply to nearshore areas cut off by riprap and concrete and wooden bulkheads; • Marine riparian vegetation provides wildlife habitat, microclimates (shade/prey), source of large woody debris, bank stability, improvements to water quality; and • Subestuaries and deltas depend upon rainfall to bring sediments from upstream to the nearshore area. High flow rates and volumes resulting from increased runoff from impervious surface can alter the formation and function of these features. March 2005 Page 43
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CITY OF DES MOINES SHORELINE MASTER PROGRAM

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