South Buffalo Creek Water Quality and Habitat Improvement ... · South Buffalo Creek Water Quality...
Transcript of South Buffalo Creek Water Quality and Habitat Improvement ... · South Buffalo Creek Water Quality...
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South Buffalo Creek Water Quality and Habitat Improvement ProjectA Decade of Lessons Learned and Applied Using Adaptive Management and Design
Jeremy McCall, P.E., CFMGreensboro, NC Water Resources [email protected]
Jennifer Murphy, P.E. [email protected]
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Presentation Outline
• Project Background and Overview• Construction of Phases I-III• Repairs to Previous Phases• Phase IV• Lessons Learned
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Project Background and Overview• History and Project Goals• Site Location and Acquisition• Greensboro’s Goals and Requirements• Design Approach and Objectives
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Clean Water Management Trust Fund Grant
• Applied for grants in 2008, 2012, 2013, 2014, and 2015• Awarded a total of $1,467,350!
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The Original Plan: Three Phases
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South Buffalo Creek
UT3 UT2
Kersey Tributary
Piedmont Creek
UT1
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Phase II - Construction Completed 2014
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Phase III - Construction Completed 2015"
Phase I - Construction Completed 2013
W Meadwoview Rd
Farragut St
Phase Boundaries I-IIIWetland SloughBankfull BenchStructuresRestored Centerlines
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Existing Floodplain Slough Wetlands
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South Buffalo Constructed Slough
Early Spring 2014
Late Spring 2014 with sediment deposition
July 2018
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Piedmont Creek Enhancement
MapSpring 2014
Piedmont Creek
Before construction
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Kersey Tributary Relocation
South Buffalo Creek
Kersey Tributary
W Meadwoview Rd
Map
Before construction
3 months after construction
5 years after construction
Kersey
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July 6, 2018
Piedmont Creek Repair During Phase IV
October 2016July 19, 2018
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Kersey Tributary Repair During Phase IV
Damage from beaver activity
Immediately after repair
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South Buffalo Creek
• Drainage area of 15 square miles• Highly urban• 30% to 35% impervious cover• On 303(d) list as impaired biology (fish and benthos)• Featureless bed form (poor habitat)• Eroding banks
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Incision of South Buffalo CreekVegetated soil lift
from previous phase
Boulder once covered by stream invert
Approximately 1.5 feet of incision from Phase III construction to
Phase IV design
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Phase IV!
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South Buffalo Creek
UT3 UT2
Kersey Tributary
Piedmont Creek
UT1
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Phase II - Construction Completed 2014
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Phase III - Construction Completed 2015
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Phase I - Construction Completed 2013
W Meadwoview Rd
Farragut StStructures - Phase IVPhase IV Project BoundaryPhase Boundaries I-IIIWetland SloughBankfull BenchStructures - Phases I-IIIRestored Centerlines
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Phase IV - Construction Completed 2018
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Incision of South Buffalo Creek
• Adjust profile with riffles and J-Hook structures• Tie in to existing structures and bedrock• Reduce channel width and construct benches
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Inner Berm and Bankfull BenchBankfull bench
Inner berm bench
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Rock Vane to Cross Vane with RiffleExisting vane Converted structure
Urban fish habitat
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Toe Wood
South Buffalo Creek left bank looking downstream, immediately before construction of toe wood
Completed toe wood and bank grading
Toe wood under construction
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Rock Toe ProtectionBefore Phase IV
Rock toe and bank grading
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Log J-Hook with Constructed RiffleLog
Constructed riffle
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Lessons Learned• It takes a lot of staff!• Don’t be afraid of the “big” channel• Include language for adjusting inverts in the field during
construction• Ensure structures are installed per the detail – or find another
way!• If you build it, they will come• Creative debris disposal….
Stump grave
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Next Steps• Final plantings• Annual inspection by City• Invasive species program• Observation!
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Questions?Jeremy McCall, P.E., CFMCity of Greensboro, NC Water Resources Department2602 South Elm-Eugene Street Greensboro, NC [email protected](336) 373-2527
Jennifer Murphy, P.E. Kimley-Horn 421 Fayetteville Street, Suite 600Raleigh, NC [email protected](919) 677-2072