Developing Stormwater Master...“To find out where the stormwater problems are –jus t ask!” Will Wilhelm, P.E. , CFM, CPESC Derek Slocum Developing a Small Town Stormwater Master

“To find out where the stormwater problems are – just ask!”

Will Wilhelm, P.E. , CFM, CPESCDerek Slocum

Developing a Small Town Developing a Small Town Stormwater Master PlanStormwater Master Plan

Leveraging the Power of Citizens, Staff and

Funding PartnersPresented by:

2013 APWA-NC Annual Stormwater Management Division Conference

September 16

Town of Harrisburg, NC Storm Water Drainage Improvement Project

Implementation Recommendation Report(i.e., Master Plan and CIP)

Case Study

http://www.kimley-horn.com

Presentation Overview

History and Facts• Incorporated in 1973• Town-wide water system 1980• Town-wide wastewater system 1985• Served by its own fire department• Contract police with Cabarrus Co. Sheriff• Located in southwest Cabarrus County• Area = 6.3 square miles• Population = 11,526 (2010 census)

Harrisburg, NC


Storm Water in Harrisburg

• MS4 Permit (2005)• Stormwater Ordinance (2008)• Harrisburg Storm Water Manual (2008)• $50,000 CWMTF Grant (2008)• Storm Water Utility (2010)• Harrisburg Area Land Use Plan (2010)• Previous studies, assessments and

mapping• Storm Water Master Plan (2011)• CIP Projects 2012 and 2013

Quail Hollow Road


Storm Water Master Plan

• Project Area and Elements• Town limits or ETJ• Town-owned and maintained

infrastructure

• Purpose of Project• Identify problems• Determine solutions• Prioritize • Budget • Position for additional funding

Rocky River

NC-49

I-485 Inner

I-485 Outer

Stallings

Morehead

Robe

rta

Pharr Mill

Hickory Ridge

Caldwell

Pavi

lion

University City

Tryon

Robinson Church

Back Creek C

hurch

Tom Query

Pitts School

Shamrock

US-29

Sta

fford

Snow

Low

er R

ocky

Riv

er

StoughHudspeth

Patricia

Hudson

Archibald

Mulberry

John

Rus

sell

I-485

Oak Leig h

Millen

Wheat

Bovin

e

Blackwelder

Reedy

Willis

Brookwood

Morris Burn

Kim

Pit

Cam

elot Pem

broo

k

High Meadow

Timber Ridge

Riding Hill

Main

Conifer

Sims

Marshall

Reigate

Oak Hollow

Thist

le D

own

Bran

don

Clackw

yck

Grovesner

Lipp

ard

Stone Trail

Picc

adily

Kee

Ham

mer

mill

Middleton

Silkstream

Stack

I-485

Rocky River

Caldwell

¯0 7,000 14,000

Feet

LegendETJ

Town Limits

Study Limits

ETJ / Town Limits Overlap

Town of Harrisburg Limits and ETJ


Project Major Goals

• Streamlined and cost effective• Implementation focused• Citizen and stakeholder driven• Understanding previous work and staff

knowledge • Complementary of town’s MS4 Permit• Partnership


Typical town storm water infrastructures:

Pipe CulvertHeatherstone Drive

Slab Top InletWillow Lane

Curb InletRocky River Crossing

Roadside Swale Valhalla Drive

Concrete ChannelAutumn Drive

Storm Water Grate Inlet

Town Storm Water Infrastructure


Storm Water InfrastructureExample of NCDOTdrainage infrastructure:

Example of private drainage infrastructure:

Highway 49 Stallings Road (SR 1161)


Storm Water Infrastructure

Reedy Creek

Fuda Creek

Back Creek

Rocky River

Coddle Creek

Roc

ky R

iver

I-485 Inner

I-485 Outer

NC-49

Stallings

Morehead

Robe

rta

Pharr Mill

Hickory Ridge

Tryon

Caldwell

Pav

ilion

University City

Robinson Church

Back Creek C

hurch

Tom Query

Shamrock

Pitts SchoolUS-29

Sta

fford

Low

er R

ocky

Riv

er

Snow

Hudspeth

Plaza

Patricia

Hudson

McLean

Mulberry

I-485

Oak Leigh

Archibald

Millen

Wheat

Bovin

eR

eedy

Blackwelder

Brookwood

Willis

Kim

School

Cam

elot

McM

illian

Pem

broo

kRiding Hill

Main

Red Fox

Conifer

Reigate

David

This

tle D

own

Bran

don

Clackw

yck

Grovesner

Picc

adily

Kee

Ham

mer

mill

Oren Thompson

Middleton

Retreat

Windsor Forest

Silkstream

Creemore

Stack

Rocky River

I-485

Caldwell

¯0 7,000 14,000

Feet

LegendRailroad

FEMA Floodplain Boundaries

Study Area

Stream Centerline

FEMA Mapped Floodplains NCDOT Roads and Proposed Improvements

I 485

NC 49

US 29

I 485

US 29

SR 1139

SR 1138

SR 1300

SR 1161SR 2827

SR 1158

SR 1

304

SR 1168

SR

113

6

SR 1166

SR 2

801

SR 1305

SR 1160

SR 1307

SR 2802

SR 1

173

SR 1302

SR 1306

SR 1153

SR 2831

SR 2469

SR 1309

SR 1159

SR 2356

SR 1141

SR 1229

SR 2828

SR

129

9

SR 11

40

SR 3015

SR 1220

SR 1257

SR 5394

SR 1242

SR 1210

SR 1274

SR 1184

SR 2

301

SR 1196

SR 2

892

SR 2800

SR 1263

¯0 7,000 14,000

Feet

B4049 FY2011 Deliverable STIP

B4719 FY2012 Developmental STIP

LegendDOT Primary Roads

DOT Secondary Roads

Railroad

Study Area

Storm Water Infrastructure


Project Process

• Public involvement• Field work and surveys• Engineering analysis• Alternative analysis• Prioritization • Capital Improvement Plan (CIP)


Public Involvement• Website (March 2011)

http://www.kimley-horn.com/projects/HarrisburgStormWater/index.html

• Mailer (March 2011)• Questionnaire (April 2011)• Public Workshop (June 2011)


Public Involvement


Field Work and Surveys


Sufficiency Analysis


Sufficiency Analysis Results

*Partial table


Sufficiency Analysis Results

Summary of Alternatives

Culvert Improvements

Roadside Swale Improvements

Inlet Improvements

Construction Projects

Summary of Alternatives

*Partial table

Priority MatrixPriority Does Not

QualifyHigh Medium Low

Location of

Drainage

Infrastructure

Town‐owned

drainage

infrastructure in

existing right‐of‐way

or easement(value = 5 pts. )

Shared system

(Town, NCDOT,

and/or private) that

receives public run‐

off (e.g., off of a

Town road)(value = 3 pts.)

Private system that

receives run‐off from

Town right‐of‐way or

Town‐owned

property(value = 1 pt.)

Drainage system

owned by others

(i.e., NCDOT or

private) that

receives NO public

run‐off(value = 0)

FloodingPublic road(value = 7 pts. )

Dwelling structure

(above finish floor) or

business(value = 5 pts. )

Secondary structures

(garages,

outbuilding, sheds,

etc.) (value = 3 pts. )

Yard flooding or

similar nuisance

flooding (value=0)

Water Quality

(e.g., erosion)

Causing public safety

issue or may lead to

future issue (value = 2 pts. )

Extreme and

extensive erosion

that has significant

impact to water

quality d/s.(value = 1 pt.)

Minor Erosion

reported (value = 0)

Isolated issue on

private property (value = 0)

Condition

Compromised

structural integrity

(e.g. rust, significant

cracking, etc.)(value = 7 pts. )

Potential structural

problems in the

future (e.g. visually

poor condition)(value = 3 pts. )

Not to current

standard (e.g.,

wrong inlet type),

but capacity and

physical condition is

ok (value = 0)

Drainage system

owned by others

(i.e., NCDOT or

private) that

receives NO public

run‐off(value = 0)

Prioritization of Proposed Improvements

*Partial table

Current Storm Water Funding

*Partial table

Capital Improvement Plan (CIP)

Capital Improvements Plan (CIP)



Project Implementation


Presentation Overview

During Project

People still read their mail

Stay focused on task at hand

Always selling• Citizens• Council

Post Project

Needed to build in a lot of contingency• Schedule• Budgets

Dynamic plan required

Lessons Learned

“To find out where the stormwater

problems are – just ask!”

Will Wilhelm, P.E. , CFM, [email protected]

Thank you


Documents

Developing Stormwater Master...“To find out where the stormwater problems are –jus t ask!” Will Wilhelm, P.E. , CFM, CPESC Derek Slocum Developing a Small Town Stormwater Master