robert roseen, phd, pe, d.wre rroseen@waterstone-eng.com 603-686-2488 · 9 shared implementation...

Robert Roseen, PhD, PE, D.WRErroseen@waterstone-eng.com 603-686-2488

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POWER OF REDEVELOPMENT

1. The process of optimizing and prioritizing stormwater management retrofit opportunities to achieve the lowest cost solution, and

2. Harnessing the power of redevelopment through LID zoning to capture the private sector redevelopment cycle to gradually build resiliency and improve water quality through the upgrade of stormwater management and land development practices.

7.5

10

.9 12

.4 15

.6

3.1 5

.5 6.8 8

.6

6.5

10

.1 12

.7 15

.5

1990 2000 2005 2010

Pe

rce

nt

Imp

erv

iou

s C

ove

r

YearExeter Newfields

4Source: M. Voorhees, EPA Region 1 TMDL Program, 2016

BMP OPTIMIZATION

Initial load=13.3 lbs N/acre/year

Optimized load=3.3 lbs N/acre/year

WQV load=0.6 lbs N/acre/year

1 acre 1 acre1 acre1 acre1 acre

1”WQV 0.25”WQV 0.25”WQV0.25”WQV 0.25”WQV

Removes 12.7 lbs N/ac/yr

Each removes 10 lbs N/ac/yr for a total of 40 lbs

•$40K can build one large system or 4 smaller systems

•An additional 27 lbs of nitrogen per year at nearly equivalent costs, or approximately 315% increase.

DRAINAGEAREA

BIO-RETENTION

POLLUTANT LOAD

REDUCTION

COST

0

2

4

6

8

10

12

14

16

TN R

ed

uct

ion

(to

ns

N/y

r)

Capital Cost ($M)

Integrated Planning Traditional MS4

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BEST COST SOLUTION

IP treats 2,000 acres & 8 Tons $14M Traditional treats 2,000 acres & 8 Tons $22M Traditional treats 5,250 acres & 13.5 Tons $95M

$0

$50

$100

$150

$200

$250

$300

$350

EX5 (133 T) IP 3 (129 T) EX6 (128 T) IP 6 (126 T) T 2 (125 T) IP 7 (119 T) T 3 (119 T) T 4 (114 T)

Tota

l 50

-YR

PV

Co

st (

$M

)

WWTF Capital Cost WWTF O&M NPS Capital Cost NPS O&M

020406080

100120140160180200

Tota

l Nit

roge

n L

oad

(to

ns

N/y

r)

Stormwater Load Groundwater (non-septic) Load Septic System Load WWTF Load Upper Watershed Load

7

ANNUAL LOAD VS. PRESENT VALUE

Eelgrass Target Load (88 Tons/YR) DO Load Target (140 Tons/YR)

NP

S M

EP

NP

S M

EP

NP

S M

EP

NP

S M

EP

NP

S M

EP

T-ROIP-5 IP-3 IP-ROEX-3 T-5 T-3

Scenario (Annual Receiving Water Load (TONS))Ranked by Increasing Load Reduction

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IP3/IP6: MUNICIPAL COSTS

• A portion of the proposed BMPs are intended to treat “municipal” land uses, which the town would implement themselves. These include BMPs treating:• Institutional land uses• Roads• Outdoor and other built-up land (i.e. parks)

Town

Total NPS Implementati

on Cost($M)

Municipal NPS

Implementation Cost

($M)

WWTF Upgrade

Cost($M)

Total Cost to Town($M)

Annual Cost to Town (30 yrs)

($M)

Exeter $8.55 $4.90 $85.95 $90.85 $3.03

Newfields

$1.33 $0.76 $2.17 $2.94 $0.10

Stratham $3.74 $1.94 $3.26 $5.20 $0.17

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SHARED IMPLEMENTATION COSTS PUBLIC AND PRIVATE

1. $163,000 or 57% of the total annual non-point source implementation cost (capital and O&M) will be incurred by the municipality for controls on municipally owned land (i.e., roads, parks, schools)

2. $122,000 (or 43%) annually is estimated to be covered by the private sector for the redevelopment and operation and maintenance of non-town owned properties occurring primarily in commercial, industrial, and residential areas.

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WISE PROJECT TEAM

Robert Roseen, Project DirectorRenee Bourdeau, Project ManagerChad Yaindl, Senior Staff Engineer

Alison Watts, Watershed Science Lead

Cliff Sinnott and Theresa Walker, Intended User Representatives

Jennifer Royce Perry, Public Works Director, Exeter Don Clement, CouncilPaul Vlasich, Town EngineerSylvia VonAulock, Town Planner

Paul Stacey, Science Investigator, Steve Miller, Training Program and Climate Adaptation

Doug Thompson and Eric Roberts, Collaboration Experts

Clay Mitchell, Town Planner, NewfieldsBill Meserve, Municipal Rep.

Paul Deschaine, Town Administrator, StrathamLincoln Daley, Town Planner

Rich Langan, Funding Agency DirectorKalle Matso, Program Manager

Mark Voorhees, Newton Tedder, Dan Arsenault, David Pincumbe, Carl Deloi

Ted Diers, Matt Wood, Phil Trowbridge, Barbara MacMillan, Sally Soule, Eric Williams

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ADDITIONAL INFORMATION

http://www.wisenh.net/

Robert M. Roseen, Ph.D., P.E., D.WRE.

Principal, Waterstone Engineering, PLLC(603) 686-2488 (c)

rroseen@waterstone-eng.com

Questions/Comments?

12

Robert M. Roseen, Ph.D., P.E., D.WRE.Principal, Waterstone Engineering, PLLC

(603) 686-2488 (c) rroseen@waterstone-eng.com

2016 Environmental Merit Award EPA Region 1

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POTENTIAL UPPER WATERSHED CONTRIBUTIONS TO MEET WATER QUALITY GOALS

0

10

20

30

40

50

60

70

80

90

100

Load

Re

du

ctio

n (

ton

s N

/yr)

Potential Timeline

WWTF Reductions

NPS Reductions (WISE area)

NPS Reductions (Upper Exeter R. Watershed)

Eel Grass Target Load = 88 tons/yr

DO Total Load = 140 tons/yr

Adaptive management and monitoring fine tunes management of uncertainty

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APPLICATIONS

• The new proposed small MS4 permits for NH and MA

include a requirement for optimizing and ranking

retrofits opportunities.

• Optimization of designs used at the watershed scale

can significantly reduce costs for achieving load

reduction targets for nitrogen, phosphorous, and

other pollutants.

• Optimization can be conducted for volume reduction

for climate resiliency.

• Adaptive management and monitoring fine tunes

management of uncertainty