CITY OF DES MOINES SHORELINE MASTER PROGRAM

More documents

Recommendations

Info

Des Moines Shoreline Master Program alternative “soft shore protection” techniques. Such “biotechnical” or “bioengineering” techniques could include imported gravel and sand, anchored drift logs or other large woody debris and be combined with marine riparian plantings along the shoreline and on the north side of Des Moines Creek. This would improve subestuary and delta functions, increase habitat quantity and quality for both terrestrial and aquatic animals using the shoreline, and expand beach recreation. Opportunities on the south side of the stream mouth (labeled A-2 on photo) could include the removal of the existing rock revetment and concrete bulkhead on the north side and the former boat ramp. The bulkhead could be replaced with soft shore protection techniques and marine riparian plantings. This would require removal of some fill material from the site and moving the existing path landward. A pocket beach could be created that would be largely in the shelter of the marina breakwater and would provide a new recreation beach. This would improve the subestuary and delta as well as provide additional aquatic (including forage fish spawning habitat) and terrestrial wildlife habitat, and beach recreation. Removal of the failing revetment north towards the City limits is another possible action that would allow sediment to migrate from upland areas to the shoreline and improve beach habitats. • Des Moines Marina. Redevelopment of the marina is planned and described in the Marina Master Plan (City of Des Moines, 2001). Opportunities during redevelopment over the years are related to improvement of water quality in the marina, including development or refinement of operational Best Management Practices (BMPs) for handling of and storage of fuels, and other contaminants associated with boating. The replacement of the timber seawall with non-creosote materials (steel sheet pile structure) has been identified in the master plan. • Zenith Neighborhood / Massey Creek. Opportunities include the removal of riprap from the mouth of Massey Creek on the south bank (the north bank is currently part of the Des Moines Marina breakwater) (labeled C-1 on photo). The riprap could be replaced with soft shore protection Department of Ecology approval effective November 1, 2010 40 Adopted by City of Des Moines Ordinance No. 1502
Des Moines Shoreline Master Program techniques (possibly with some rock to remain) combined with marine riparian plantings along the shoreline and on the south bank of Massey Creek. With net shore-drift to the north in this area, the beach should continue to accrete such that erosion is not a threat here. Stream flow would need to be quantified to allow analysis of the expected amount of stream mouth closure as compared to salmon return periods. The removal of riprap would provide improvements to the subestuary and delta, and riparian plantings would increase habitat quantity and quality for both terrestrial and aquatic animals using the shoreline. The creation of a much larger estuary to provide additional habitat benefits would likely require purchasing the property and possibly removing the building immediately south of the creek. Riprap and fill could be removed from the south bank (and possibly riprap from the north bank) landward of the marine shore to enlarge the estuary. This site was also identified in the WRIA 9 Salmon Habitat Plan as Project NS- 13: Massey Creek Pocket Estuary Restoration in Des Moines. Identification in this regional plan increases the likelihood of funding and implementation. One failed bulkhead is present approximately at South 245th Street in the Zenith neighborhood (not shown on photo). The wooden soldier pile wall is over a portion of the intertidal beach (Coastal Geologic Services, Inc. 2005) and is no longer functioning to protect the bluff from erosion. Simple pile removal would help restore natural beach conditions and bluff processes. Some of these may be creosoted piles, so additional water quality benefits could be achieved. • Saltwater State Park. Opportunities at Saltwater State Park could include the removal of the riprap armoring from the mouth of McSorley Creek north to the northern park boundary (D-1 and D-2 on photo). The riprap could be replaced with soft shore armoring techniques and beach nourishment materials combined with marine riparian plantings along the shoreline. This would provide additional forage fish spawning areas, and increase recreational opportunities and may allow sediment to migrate from upland areas to the shoreline. The removal of riprap and return of the area to more natural beach conditions would require the removal of substantial amounts of fill material landward of the existing riprap wall and the removal and replacement of the paved walkway. Partial restoration could occur where the riprap revetment is removed from the stream to north of the restroom, with some rock and soft shore protection placed landward of the restroom. Opportunities at the park could also include the complete removal of riprap and fill in the lower reach of McSorley Creek and along both sides of the channel at the mouth of the stream. Retention of some type of structure or existing riprap on the south side of the stream channel would maintain the stream in or near its Department of Ecology approval effective November 1, 2010 Adopted by City of Des Moines Ordinance No. 1502 41
Page 1 and 2: CITY OF DES MOINES SHORELINE MASTER
Page 3: CITY OF DES MOINES SHORELINE MASTER
Page 6 and 7: This page left intentionally blank
Page 8 and 9: Des Moines Shoreline Master Program
Page 98 and 99:
Des Moines Shoreline Master Program
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 143:
Replace with tab Appendix A - Inven
Page 147 and 148:
Des Moines Shoreline Inventory and
Page 149:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 213:
City of Des Moines City of Burien S
Page 217:
DES MOINES BEACH PARK WATE R TO WER
Page 221:
Page 225:
Page 229:
3RD A V E S 4TH AVE S 5TH AVE S 6TH
Page 233:
Page 237:
Page 241:
3 RD A V E S AVE 4TH 5TH OCK AVE S
Page 245:
Page 248 and 249:
Page 250 and 251:
Page 252:
show all

CITY OF DES MOINES SHORELINE MASTER PROGRAM

Create successful ePaper yourself

Delete template?

Save as template?