gee creek watershed restoration - WSU Clark County Extension ...

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• 2005 Sediment from Heron Ridge bridge erosion. 45a• 2006 Sediment from Osprey Pointe development blowdown slide. 27• 2006 Sediment runoff into tributary from slide undermining SR 501. 63• 2006 Sewage spill at Heron Ridge via stormwater pond. 37In addition to improving watershed conditions which are the result of historic andongoing land use impacts as previously listed, watershed enhancement planning for GeeCreek will need to consider and address impacts and develop project opportunities for thefollowing major changes in watershed land uses in the near future: Planned I-5 construction and runoff increases including SR 502 and 219 th St.exchange. City of Ridgefield rapid growth with industrial and residential construction andassociated urban land use changes. Increases in rural-residential densities and associated land uses in the countyportion of the watershed.The information produced in this report indicates that much has been assessed andrecommended for Gee Creek restoration in recent decades, and significant restorationwork has been accomplished to address earlier recommendations. Watershed conditions,influenced in the past by early settlement and largely agricultural uses, will be subject tochanging uses due to increasing rural-residential, suburban, and light industrial growthand development.A number of restoration recommendations have been made for Gee Creek over the pastdecade and a half. A summary of recent past (since 2000) general restorationrecommendations for Gee Creek was compiled from agency and private technical expertrecommendations in this report:• Streamside plantings to reduce summer temperature• Protect existing forest along streams• Stabilize erosion sites (reduce sediment)• Stormwater and erosion control (sediment) regulations for construction anddevelopment• Assess sedimentation and fish passage in lower Gee Creek• Instream structures, stream realignment, restore channel & floodplain, removedebris - Abrams Park/Heron Ridge reach• Find and remove pollutants and bacteria• Limit rural lot sizes and limit further degradation due to development• Conduct stream assessments including salmonid habitat conditions• Reduce warmwater fish species• Encourage rural and suburban watershed best management practices• Assess and reduce effect of ponds on temperature and fecal bacteria• Exclude livestock• Continue water quality monitoring and fish species surveys40
• Control knotweed and blackberryPotential projects for future watershed improvement could be chosen and prioritized fromthese most recent recommendations and general watershed improvement objectives.Some past projects may need to be reviewed and decisions updated. The status of pastrestoration work, especially streamside plantings, could be further documented and theenhancements monitored and maintained. Many of the watershed’s stream reaches havenot been recently or comprehensively assessed to identify specific watershed features andopportunities for improvement. Locations of recommended projects, past assessments,and completed restoration have not been comprehensively mapped and documented.Information in this report is provided to assist in collectively prioritizing restorationprojects from recommended actions, and in identifying areas where more information,studies or assessments are needed.Citizen, local government, and agency technical expert advice will be solicited toconsider the information in this report and collectively make recommendations andupdated decisions on the next best projects for maintaining and improving the health ofthe Gee Creek watershed.41
Page 1 and 2: GEE CREEK WATERSHED RESTORATIONBACK
Page 6 and 7: Location and Environmental SettingG
Page 8 and 9: Fig.3. Gee Creek watershed topograp
Page 10 and 11: Fig.5. Gee Creek channel soon after
Page 12 and 13: Land Use HistoryThere is more histo
Page 14 and 15: undergrowth”(Fig.15). A second an
Page 16 and 17: Fig. 10b. Concrete wall deflecting
Page 18 and 19: Fig.14. 1854 Cadastral Survey Map (
Page 20 and 21: 2005. 12,38 Recent housing developm
Page 22 and 23: Salmon and Trout Use HistoryLittle
Page 26 and 27: 1997 - Washington Trout conducts a
Page 28 and 29: ############# ##Fig. 21. Juvenile c
Page 30 and 31: • Coordinated Hansen Farm livesto
Page 32 and 33: In 2005, USFWS RNWR created a parti
Page 34 and 35: • High sediment transport levels
Page 36 and 37: • Stormwater detention and infilt
Page 38 and 39: General Clark County stream health
Page 42 and 43: References1. Ames, Kenneth, Portlan
Page 44 and 45: 24. Ecklund, Alan. 1998. USFWS CRFP
Page 46 and 47: 45a. Snoey, Paul. 2005. Ridgefield,
Page 48 and 49: 66. Wisseman, Robert. c.1995. Aquat
Page 50 and 51: 1825?-1854 Fur trading trail from F
Page 52 and 53: 1879 Nonnative carp make their way
Page 54 and 55: 1911 First shingle mill in Ridgefie
Page 56 and 57: 1940-1960 Reed canary-grass planted
Page 58 and 59: 1960’s-1970’sBridge taken out a
Page 60 and 61: 1995-1997;2000Approximately 3000 de
Page 62 and 63: Apr-97Sediment event from majorland
Page 64 and 65: January 19,2000Salmonid limiting fa
Page 66 and 67: 2001-2006 Gee Creek EnhancementComm
Page 68 and 69: 2004 Trees bucked into Gee Creek to
Page 70 and 71: Dec 2004Ridgefield comprehensive pl
Page 72 and 73: Jul-05USFWS NWR-CRFPO workshopheld

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