Donaldson Run Tributary B Stream Restoration Project Update. Donaldson Run Stakeholder Advisory Group Meeting June 2, 2011

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1 Donaldson Run Tributary B Stream Restoration Project Update Donaldson Run Stakeholder Advisory Group Meeting June 2, 2011

2 Review of changes from 30% to 60% design Reducing width of channel/floodplain to reduce footprint and tree/valley impacts Limiting re-location of pathway and narrowing pathway Reducing disturbance and tree impacts below the footbridge

3 Updates from 60% design to 75% in February 2011 Step pool grade control and riffle structures Initial analysis of hillside and storm pipe drainage inputs Initial water main survey Preliminary planting plan Invasive plant management framework

4 Updates from 75% design to Hydraulic analyses 90% design Vertical elevation of water main (pending) Hillside and storm pipe drainage inputs Meetings with specific property owners Easement research Preliminary design Advancement of planting plan and invasive plant management strategy Consideration of construction access, equipment type, future maintenance access

5 Hillside drainage inputs Working with specific property owners Accommodating flow inputs in project design

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7 Storm pipe drainage inputs Verifying easements/pipe conditions Incorporating needed repairs/modifications into project design

8 Storm pipe drainage inputs next steps Complete easement research meet with specific property owners At least one new easement may be needed TV inspection of all three pipes Finalize designs that control stream energy and minimize future maintenance

9 30 Water Main Interim work completed to protect exposed pipe Completed horizontal location survey in January May - Small borings excavated to confirm pipe elevations Data analysis pending Few apparent conflicts with stream restoration design except at stilling basin TBD Considering reinforced streambed crossings for future access to main if needed

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12 Trees No change in tree impacts from project from 60% designs to current design One tree removed to protect water main (previously listed as a potential removal) One tree has fallen (previously listed as a removal) Project impact: 36 trees>10 diameter, 72 trees overall

13 Invasive Management & Planting Plan Goals: To restore forest structure and function To support recreational use and aesthetics

14 Kudzu Invasive Plants 85-95% invasive species in the shrub and ground layers invasive species present on both park and private properties 27 different species

15 Implications Invasive management considerable component of the project Project requires integrated planting and invasive plant removal 4-6 year planting and invasive plant maintenance schedule Complete removal of invasive species is likely not possible Most successful if private citizens are involved in invasive management

16 Invasive Management Actions to Date Invasive plant removal workday, April 2 Invasive Plant Workshop Upshur St, May 1 Hosted by Amy White Invasive Plant Workshop Stuart St, May 17 Hosted by Sarah & Jeffrey Knight PRCR sprayed lesser celandine along both Tributary B and Tributary A Need help from the Civic Association to generate volunteer turn out and ideas on how to recruit additional volunteers

17 Invasive Management Actions - Next Steps In the future, a spring and fall event will be held on both Tributary A and Tributary B Coordination with or expansion of the 2 existing RIP teams (Remove Invasive Plants) working in Zachary Taylor Park and coordination with Arlington Master Naturalists is being pursued Possibly one more invasive plant workshop to engage homeowners is under consideration for fall 2011

18 Invasive Management Looking Ahead During construction/planting Clean equipment Mulch or mats for trees/shrubs Seed heavily Protect deer candy Post-Project/Maintenance Protect trees and shrubs Focus on stream banks Target species Coordinate invasive removal and planting Timing of control will depend on plant life cycle Flexible and adaptive

19 Planting Plan Site specific All plants will be native to Zachary Taylor Park Planting zones to account for habitat changes with elevation and distance from the stream. Special plantings for sensitive areas Multi-year to account for invasive control and natural forest succession

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21 Zoned Planting - Example Slope Floodplain

22 Special Areas Bare Slopes

23 Scarlet oak Quercus coccinea Arrowwood Viburnum dentatum Bluestem goldenrod Solidago caesia

24 Construction methods, equipment, & materials

25 Smaller materials and equipment

26 Smaller materials and equipment

27 Tree protection mats

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29 Step pools and Step run feature

30 Next Steps Continue work with property owners on hillside drainage inputs and design work for storm pipe drainage inputs Finalize planting plan and invasive plant management plan Develop construction access/staging plan Complete specifications including tree protection plan Target design completion by end of year Construction schedule still TBD

31 Tributary A, June 2010 Stream restoration, watershed retrofits, Chesapeake Bay Preservation Ordinance, Stormwater Permit and more. Learn more at: search Donaldson Run.