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Pine Valley Country Club Stream Restoration: Phase 2 Proposal

Pine Valley Country Club Stream Restoration: Phase 2 Proposal. Presented March 17, 2003 Greg Jennings, NC State Univ Barbara Doll, NC Sea Grant Dave Bidelspach, NC State Univ Dan Clinton, NC State Univ Mac Haupt, NC WRP Dave Mayes, City of Wilmington. Overview.

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Pine Valley Country Club Stream Restoration: Phase 2 Proposal

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  1. Pine Valley Country Club Stream Restoration:Phase 2 Proposal Presented March 17, 2003 Greg Jennings, NC State Univ Barbara Doll, NC Sea Grant Dave Bidelspach, NC State Univ Dan Clinton, NC State Univ Mac Haupt, NC WRP Dave Mayes, City of Wilmington

  2. Overview • Goal: Improve the water quality, stability, ecological function, and aesthetics of streams flowing through the Pine Valley Country Club • Location: Middle Branch of Hewletts Creek including approximately 3,300 feet of perennial stream channel • Purpose of Presentation: • Describe proposed stream restoration project • Seek feedback on proposed stream restoration, vegetated buffer enhancement, and stormwater management

  3. NC Wetlands Restoration Program • Established in 1996 to restore wetlands, streams and riparian buffer areas for the purposes of improving: • Water Quality • Aquatic and Terrestrial Habitat • Floodwater Prevention • Pollution Prevention • Overall Watershed Function • Through State resources the NCWRP can fund: design, permit acquisition, construction and long term management of the site.

  4. Defining the Problem • Watershed Issues: • Closed and impaired shellfish waters • Urban stormwater runoff • Nutrient inputs resulting in algal blooms • Sediment inputs • Growth and development • Channelized streams • Land Based Physical Impacts: • Eroding stream channel = loss of golf course property and loss of aesthetic values

  5. Existing Stream Conditions Unstable eroding streambanks Poor water quality Poor vegetation (exotic species)

  6. Project Objectives & Benefits Stabilize streams on PVCC property Improve water quality in Hewletts Creek and downstream shellfish waters Improve natural stream & floodplain functions Improve stormwater management & provide additional water source for PVCC Establish native vegetation Improve stream crossings (culverts & bridges) Improve aesthetics of stream corridor

  7. Stream Restoration Adjust stream conditions based on reference reaches such that natural stream functions are improved: Channel geometry modification Instream structures Bank stabilization Riparian vegetation

  8. Stable Stream • transports the water and sediment produced by its watershed • maintains its dimension, pattern, and profile • while neither degrading nor aggrading • Rosgen, 1994

  9. Unstable Streams • Problems • Water quality • Habitat loss • Floodplain functions • Land degradation • Causes • Channelization • Land use changes • Loss of buffer

  10. Stable Stream BKF Water Table Not Incised BHR = 1.0 ER > 2.2

  11. Incised Channel BHR > 1.0 ER < 1.4 BKF Water Table

  12. Priority 2 Restoration New Stable Channel with Lower Floodplain BKF Bankfull Bench Incised Channel

  13. Priority 2 Restoration Plan View Top of Bank Replace Old Channel Incised Channel New Excavated Channel & Floodplain Top of Bank

  14. Pine Valley Golf Course Phase 1 • Length = 1000 ft • Construction Cost = $125,000 • Completed May 2001

  15. Proposed Schedule Spring 2003: Complete design & permit applications Summer 2003: Hire construction firm November 1, 2003: Begin construction January 2004: Complete construction February 2004: Plant streambanks & floodplain

  16. What Can the Project Provide for PVCC? New stormwater pond can be used for irrigation New culvert replacements will provide vehicle crossings New footbridge replacements Cart path relocations Fill soil used to enhance driving range drainage Ornamental plants (large trees & shrubs)

  17. City of Wilmington Perspectives If NCWRP constructs this project: Technique – stream restoration for mitigation credits Schedule – now Cost – paid by State (8,000,000 population) If City constructs this project: Technique – stream restoration or other environmentally friendly method Schedule – Council approval of Capital Improvement Budget; $70+ M of identified needs; $500,000/yr of new projects Cost – paid by City (92,000 population) If PVCC constructs this project: Technique – your choice as long it is permittable Schedule – based on priorities of the Country Club Cost – paid by members of the club (400 members - $1500/member)

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