Morgan and Little Creeks Local Watershed Plan

Totten Center, NC Botanical Garden

3 November 2004

Chapel Hill, NC

http://www.nceep.net

Drivers for Local Watershed PlanningStream and Wetland MitigationNC DOTUS ACE

Stormwater ManagementNPDES (Phase II)

Impaired Streams ListSection 303(d)Total Max. Daily Load (TMDL)

Nutrient ManagementJordan Lake StrategyTotal Max. Daily Load (TMDL)

Cape Fear 02 Mitigation Need

Based on current estimates 27,055 linear feet of stream 5 acres of non-riverine wetlands

Estimate combines DOT and In-Lieu Fee program needs

Time period for mitigation need is 2005-2006

What DOT Impacts Are Being Mitigated

Selection of Morgan and Little Creeks

Screening Cataloging Units Interagency Team Process

Identifying Targeted Local Watersheds Selecting Local Watersheds for Stakeholder

Planning Process Problems (303(d) listed streams, water supply) Assets (headwaters streams, development threats) Local Interest (towns, county, citizen stream groups) Data and other Resources (university, government)

Study Area - Subwatersheds

Morgan Creek Orange County Chapel Hill Carrboro Chatham County

Little Creek (Bolin & Booker Creeks)

Orange County Chapel Hill Carrboro Durham

4 4 Key IngredientsKey Ingredients of a of a successfulsuccessful Local Watershed PlanLocal Watershed Plan

Technical Assessment: Consultant

Services

Watershed Water Quality

Monitoring

Local Stakeholders & Resource

Professionals

Local Partners to assist with local involvement &

implementation

Participantsin Planning Process

Orange County, Chapel Hill, Carrboro, Durham UNC at Chapel Hill OWASA Triangle Land Conservancy Morgan Creek Valley Alliance Friends of Bolin Creek NC Wildlife Commission US Fish and Wildlife Service US Natural Resources Conservation Service Triangle J Council of Governments

Improve and Protect Watershed Functions Accomplishing this goal involves

addressing: eutrophication in Lakes in-stream water quality conditions modification of floodplain hydrology headwater stream stability &

sediment loading aquatic and terrestrial wildlife habitat

Functioning Floodplain & Riparian Zone

Toms Creek behind Willow Creek Shopping Center

Non-Functioning Floodplain & Riparian Zone

Smith Level Road

Functioning Aquatic Habitat

Bolin Creek Tributary at Adams Tract

Non-Functioning Aquatic Habitat

Booker Creek Below Willow Drive

Three Phases of Assessment

Preliminary Findings

Detailed Assessment

Targeting of Management

Preliminary Findings

Erosion and Sediment in Streams

Impaired Water Quality/Toxicity

Degraded Aquatic and Terrestrial Habitat

Jordan Lake Nutrient Loads & TMDL

Potential Sources

Urbanization Imperviousness Disturbed buffer Floodplain

encroachment Leaking sewer/septic

Agriculture Disturbed cover Livestock access

Detailed Technical Assessment

Potential Sources, Stressors and Strategies

Quantify Magnitude of Impacts Predicted impact from various stressors using:

Empirical Models GIS Analyses Statistical Analyses

Predicted Nitrogen and Phosphorus loads to Jordan Lake

Modeled other stressors, including: Sediment Loading Stream Erosion and Instability Imperviousness Buffer disturbance

Total Nitrogen Exerted Loads – Full Buildout Scenario

Durham City

Orange County

Chapel Hill

Carrboro

Durham County

Chatham County

Loading Rate (lb/ac/yr)1 - 33 - 55 - 77 - 99 - 1111 - 13

N

2 0 2 4 Miles

Priorities by Combined Function

NC 54

Air port

Fo

rdha

m

Franklin

Col

umbi

a

Fordham Blvd South

US 15-501

Rosemary

NC 54 (Bypass)

US 15

Main

CHATHAM

ORANGE

DURHAM

LM6

UM4

UM1

UM5

BL13

LM2

BL4

LM1

UM7

BL1

UM8

BL3

UM2

UM6

BL2

LM4

UM3

BL8

BL10

BL5

BL6

BL9

LM3

LM5

BL7

BL11

BL12

Chapel Hill

Carrboro

N

1 0 1 2 Miles

Tier 2Tier 1

Targeting Priority

LEGENDSubwatershed BoundariesCounty BoundariesMajor Roads

USGS 1:24,000 Hydrography

Perennial StreamsIntermittent Streams

Inundation AreasOpen Waters

Municipalities

Targeting of Management

Specific Watershed Recommendations

Potential Strategies Stream restoration Stormwater management Best Management Practice retrofits Conservation of undeveloped land Low density/low impact development Further monitoring and analysis

Stream Restoration

Hillandale Golf Course, Durham

Stormwater Management

University Mall

Conservation of Undeveloped Land

Morgan Creek at Andrews Road

Residential ScaleLow Impact Design

Little Creek

Crow Branch

Bo

ok e

r Cre

e k

Chapel C

reek

Bolin Creek

EastwoodLake

Bolin Creek

Morgan Creek

Chapel Hill

Carrboro

Airpor t

For

dham

Franklin

Colu

mbia

Fordham Blvd South

US 15-501

Rosemary

NC 54 (Bypass)

Main

Chapel Hill

Carrboro

LM1

BL4

BL1

BL3

BL2

LM4

BL8

BL10

BL5

BL6

BL9

LM3

LM5

BL7

BL11

BL12

Site 3

Site 7

Site 8

Site 9

Site 4

Site 5

Site 6

Site 10

Cedar Fork

1

13

2

714

4

5

16 15

17

10 9

6

12

811

19

2021

22

18

232425

26

Tier 1 & Tier 2 LWP Subwatersheds

Municipalities

NWI Wetlands

USGS 1:24,000 Hydrography

Perennial StreamsIntermittent Streams

Inundation AreasOpen Waters

Major RoadsRoadsCounty BoundariesLWP Subwatershed Boundaries

LEGEND

UNC-Chapel Hill Main Campus

BMP Retrofit SitesBMP Contributing Watersheds

Building Footprints

SCALE

1 0 1 Miles

N

EW

S

Stream Restoration Sites

Restoration Opportunities

#S

#S

#S

"X

"X

Hogan Farm (BL1)

Upper Bolin Creek (BL2)

Horace Williams (BL3)

121

97

114

355

127

137

270

315

106

324

356

124123

136

352

331

357

343 341336

128

85

43

94

271

42

232

166

240

184

161162

192

183

179

163

288

249

362

348

334

133

287

7381

45

202

88

269285

48

177

132

180

99

295

188

332

181

171

164165

150

286

67

310

203

267

309

194

294

60

61

245

359

277

152

154

145

158

170

86

155

369

205

365

117

195

353

108

151

189

333

337

156

5355

39

182

316

335

176

327

178

378

373

377

148

347

66

312

364

293

339

401

363

160

264268

256263253

122

380-384

278

246

351346

250 239

323

113144

289

325

344

251

58

68

207 211

322

372

400

HOMESTEAD RD

OLD

NC

86

EUBANKS RD

HOMESTEAD RD

62

109

BOLIN CREEK

Site 7

N

EW

S

0 0.5 1 Miles

SCALE

USGS 1:24,000 K HydrographyPerennial StreamsIntermittent Streams

County StreetsRail Lines

Subwatershed Boundaries

Orange County Buildings

Significant Natural Heritage AreasLand within 100-year floodplain or within 300 feet of stream

Natural Heritage Element Occurrences#S Plant"X Salamander#S Natural Community

Waterbodies

LEGEND

NWI Wetlands

Accurate resolution not available14 - 1811 - 138 - 104 - 7

Priority Scores for Preservation Parcels

Municipal Boundaries

Tier 1 Priority Subwatersheds

Land Managed for Conservation and Open SpacePotential Stream Restoration Site

Preservation Sites:Upper Bolin Creek (BL1-BL3)

Summary of Opportunities11 Stream Restoration Projects

28,250 linear feet of restored stream

BMP Sites IdentifiedTreat 600 acres of priority subwatersheds

137 Priority Preservation ParcelsOver 600 acres of high quality riparian

habitat targeted for preservation efforts

Stream Restoration Cost-Effectiveness Estimates

Site Num  Stream Name/Location 

Stream Length 

Rest-oration Length 

Cost /Foot  Total Cost 

Sediment Reduction (tons/yr)

 Cost/Ton (initial)

Cost/ Ton per

Year (20 yrs)

4 UT to Bolin Cr. at Airport Rd. 500 600 $205 $123,000 135 $911 $461&1a Morgan Cr. at Maple View Farms 7,000 8,500 $205 $1,742,500 1,462 $1,192 $60

2 Morgan Cr. at Lemola Dairy Farm 3,500 4,200 $205 $861,000 375 $2,299 $11510 Chapel Cr. at Finley Golf Course 1,100 1,300 $205 $266,500 83 $3,203 $1603 Lower Booker Cr. 4,000 4,500 $205 $922,500 760 $1,214 $619 Toms Cr. at Main St. 1,700 2,000 $205 $410,000 127 $3,228 $1617 Bolin Cr. at Hogan Farms 3,300 4,000 $205 $820,000 251 $3,268 $1636 Little Cr. at Chapel Hill Country Club 800 950 $205 $194,750 64 $3,024 $1515 UT to Bolin Creek near E. Franklin St. 1,000 1,200 $205 $246,000 — — —8 UT to Morgan Cr. near S. Greensboro St. 800 1,000 $205 $205,000 — — —

Total 23,700 28,250 $2,050 $5,791,250 3,256 $18,341 $917

Value of Project Development Investment through Watershed Planning 28,250 linear feet of stream $205 per foot $5,790,000 worth of potential stream

mitigation identified by plan $456,000 spent on screening, plan, and

stakeholder facilitation Cost is 8% of value of opportunities

(budget for planning was 10%)

Next Steps

Implementation

EEP Implementation

Stream Restoration & Enhancement Chapel Creek – stream restoration Mason Farm – floodplain restoration

Best Management Practices (BMPs) Best if in conjunction with restoration

Preservation Easements required for all projects Acquisition or donation

Chapel Creek Stream Restoration Project Agreements between NCEEP and UNC to

implement restoration at abandoned golf course link

Runoff from development of UNC campus Stream is incised and entrenched, has little

buffer, and is destabilized with active erosion Restoration Design Objectives:

Construct new channel Alleviate erosion Improve aquatic habitat Reconnect stream to accessible floodplain

Chapel Creek Estimates

Stream Length 1,100 feet Restoration Length 1,300 feet Estimated Cost/foot $205 Estimated Total cost $266,500 Sediment Reduction 83.2 tons/year Cost/Ton (initial) $3,200 Cost/Ton (20 years) $160

Chapel Creek Site

Bridge at Chapel Creek

Contact InformationDeborah Amaral, Ph.D., NC EEP919-715-3466 deborah.amaral@ncmail.net

Bonnie Duncan, NC EEP919-715-5315 bonnie.duncan@ncmail.net

Jason C. Doll, Stantec, Inc. 919-851-6866 jdoll@stantec.com

Download Information

http://www.nceep.net/services/lwps/Morgan_Creek/morgan.htm Morgan and Little Creeks Local

Watershed Plan Summary (coming soon!)

Preliminary Findings Report Detailed Technical Assessment

Report Water Quality Monitoring Addendum

(coming soon!) Targeting of Management Report