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 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

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.

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

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

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

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

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

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

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

BKF BHR > 1.0 ER < 1.4 Incised Channel Water Table

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

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

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

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

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)

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)