Gre reen en Fi Firs rst t Ci City ty-Wide Wide St Stormwa - - PowerPoint PPT Presentation

Gre reen en Fi Firs rst t Ci City ty-Wide Wide St Stormwa rmwater ter As Asse sessme ssment nt

September 26, 2016

At the turn

• f the 20th century,

Pittsburgh embarked

• n its biggest

infrastructure improvement campaign, building sewers, water lines, roads, power lines that created the city we know today.

THE E PROBLE LEM M - We have a STORMW RMWATER ATER MAN ANAG AGEME EMENT NT problem resulting in:

 Poor Water Quality  CSOs/SSOs  Illicit Discharges – sewage in storm sewers  Surface Flooding  Basement Sewage Flooding  Sewers that are 80 – > 100 years old  Consent Decree and MS4 Requirements

We need an AF AFFOR ORDA DABLE LE PLA LAN N to address AL ALL L OF THES ESE E ISSUES UES

Sol

• lut

utio ion: n: Inv nvest st in in s stor

• rmwater

water managemen nagement t at the he sur urface ace and nd op

• ptim

imiz ize the he sewer system

Ov Over erfl flow

• ws |

| Fl Flooding ng |Wat ater er Qua uality ty SA SAME ME ROO ROOT CAU AUSE SE

Exces essi sive ve Stormwat water er Ove verloa

• ading

ing Our Already ady Stress ssed d Sewer System

Issue 1: CSOs and SSOs Issue 2: Localized Flooding Issue 3: Water Quality

As the Pittsburgh Region grows, we seek a comprehensive SYSTEMS approach to address all of our community and infrastructure needs with one investment.

The he Cl Clea ean n & G Gre reen en plan an pre rese sent nts s so solut ution

• ns

s th that at ar are: e:

CO COMP MPLIANT NT AFFOR ORDABLE ABLE EN ENGI GINEERED NEERED BENEFIC EFICIA IAL REP EPLICABL CABLE

Provides a unified, comprehensive, & long term approach toward regulatory compliance More cost effective to address multiple issues, solving the problem rather than addressing a single symptom. Strategic design for system integration &

• ptimization to increase resiliency

Maximize triple bottom line – environmental, economic and social benefits Methodology and protocol for implementation across all watersheds

• CS

CSO re O reduction ion

• baseme

ment fl flooding ing eli limi mination ion

• wa

water qu quali lity

• stream

m infl inflow

• hazard loc

location ion

• fi

field ld verif ifica ication ion

DEMONSTRA TE TE INVEST ESTIGATE IGATE EVALU LUATE ATE IMPLEME PLEMENT

• priva

ivate-publi lic partnerships ips

• urban plan

lanning ing

• ma

market studies ies

• coordina

inate wi with develop lopers

• poli

licy & & code changes changes

• sma

mall ll-scale le ind indivi ividual l projec jects

• lar

large demo monstration ions

• education

ion & tr & traini inings

• int

integrated wa watershed ma manageme ment

• mo

monito itoring ing projec jects

• mo

monito itoring ing CS CSO O reduction ion

• triple

iple bo bottom m li line assessme ment

The he Cl Clea ean n & G Gre reen en plan an: AD ADAP APTIVE E PR PROC OCES ESS

PLAN N AND DESIGN SIGN

We need to keep rainwater out of the

• system. We can be most effective by

focusing efforts on the sheds that contribute the most to the system. We identified the top 30 sheds and

• verlaid other criteria:

RISK OPPORTUNITY DEVELOPMENT SYNERGIES

LOWER RISK EASE OF IMPLEMENTING HIGH ACTIVITY MULTIPLE BENEFITS

S S S F F F F D D D

FLOOD STREAM INFLOW DEVELOPMENT

The he Cl Clea ean n & G Gre reen en plan an: PR PROC OCES ESS

The he Cl Clea ean n & G Gre reen en plan an is is EN ENGI GINE NEER ERED ED

Identify highest contributing PWSA Stormwater inlets based on total impervious area.

Prioritize how we select locations

for green infrastructure implementation projects. This approach addresses the city’s stormwater issues with one

investment.

ESTIMATED 10:1 Loading Ratio

The he Cl Clea ean n & G Gre reen en plan an is is EN ENGI GINE NEER ERED ED

The he Cl Clea ean n & Gr Gree een n Inf nfra rast stru ruct ctur ure e Pl Plan an i is s a a “St Stor

• rmw

mwat ater er Ov Over erla lay” to to g gui uide e ou

• ur

r fu futu ture re visi sion

• n.

.

The purpose of the City-Wide Assessment is to create a “Green en First” approach to regulatory compliance that : PEOPLE: increases resiliency and minimizes hazards PLANET: improves our rainwater system functioning PLACE: enhances urban environments PERFORMANCE: stimulates economic growth

PROJECT CT AC ACTION N AR AREAS: AS:

 A42: Negley Run/Washington Blvd  M29: Four Mile Run/Junction Hollow  A22: East End/Shadyside  Saw Mill Run  M42: Streets Run

Comprehensive watershed scale solutions with a single investment

SILVER LAKE MELLON PARK

A42: WASHINGTON BLVD | NEGLEY RUN

A42: WASHINGTON BLVD | NEGLEY RUN

TRANSIT SIT HUB DEPA PAVING VING STORMW MWATER ATER | SEDIMENT IMENT | FLOOD D CONTR TROL GI WORKFOR FORCE CE TRAINI NING NG AT THE E VA HOSPIT ITAL AL CAMP MPUS HIGHL HLAND AND PARK K & RIVERFRONT NT CONNECT NECTION ION

Leech Farm Road - Before Leech Farm Road - After

A42: WASHINGTON BLVD | NEGLEY RUN

Little Negley Run

is a daylighting project that disconnects new development via an open air sewer separation project.

Community vetted project as

part of the Choice Neighborhood Planning grant. Secured $1.2 Million in design funds in a partnership with Army Corps.

PANTHE HER HOLLOW OW LAKE ALMONO O SITE JUNCTIO TION N HOLLOW STREAM DAYLIGHT IGHTING ING

M29: FOUR MILE RUN | JUNCTION HOLLOW

This plan addresses flooding at the

bottom of the 4 Mile Run watershed that impacts nearby residents and businesses.

Stormwater runoff from the Squirrel Hill

Neighborhood is reestablished in the

historic Panther Hollow stream channel.

M29: FOUR MILE RUN | JUNCTION HOLLOW

M29: FOUR MILE RUN | JUNCTION HOLLOW

SCHENL ENLEY EY DRIVE COMP MPLET ETE E STREET ET RESTOR ORE E PANTHE THER HOLLOW OW STREAM AM RETROF OFIT IT PANTHER HOLLOW LAKE RETENTION ENTION BASINS INS AND CONSTR TRUC UCTED ED WETL TLANDS NDS

M29: FOUR MILE RUN | JUNCTION HOLLOW

RETENTION ENTION BASINS INS AND CONSTR TRUC UCTED ED WETL TLANDS NDS DISTR TRIB IBUT UTED ED UNDER ERGROUN OUND STORAGE CONSTR TRUC UCTED ED WETL TLANDS NDS REESTABL STABLIS ISH H RIVERFRONT NT CONNECT NECTION ION

August 31, 2014 Rain Event: 1.05” in 15 Minutes

ISSUES: ES:

Surface Flooding, Only 11 Basement Sewage Flooding (Backups) Officially Reported 2015 Homeowner Survey Revealed Actual Chronic 136 Basement Backups

GARFIELD SHADYSIDE BLOOMFIELD FRIENDSHIP OAKLAND POLISH HILL

A22 SEWERSHED | EAST END FLOODING

A22 SEWERSHED: SHADYSIDE PROJECT

A2 A22 S 2 SEW EWER ERSH SHED ED A22 SEWERSHED: MELWOOD PROJECT

A2 A22 S 2 SEW EWER ERSH SHED ED A22 SEWERSHED: GARFIELD PROJECT

Frequent flooding of Saw Mill Run Watershed has contributed to disinv

nvestm stment nt in the watershed

communities. Integrated Watershed Management is a water

r quali lity ty-based approach to meet all of the federally

mandated reductions in sewage overflow and stormwater pollution.

Working ing togethe ther r with the 11 other municipal

paliti ities es, DEP, ALCOSAN, and Army Corps of Engineers, PWSA is developing projects with the most water quality and

community nity ben enef efits ts, regardless of municipal

borders. DEP conducted biological sampling and found very few fish and macroinvertebrates, indicating very impaired water quality.

Sa Saw Mi Mill Run un W Wat ater ersh shed ed Pl Plan anni ning ng

PR PROC OCES ESS

Maximize cost-effective water quality:

• Collecting water quality data from multiple sampling

locations in the stream

• Monitoring flow in sewer system and at outfall
• Demonstration projects selected by water quality

improvements

• Developing a model (with Army Corps assistance) that

we will use to identify additional projects to improve water quality.

Pitt ttsb sburg rgh

• Mt. Lebanon

Dormo mont Baldwi win Castle e Shannon Whiteh ehall Brent entwo wood Green en Tree

• Mt. Oliver

ver Bethel Park

Sa Saw Mi Mill Run un W Wat ater ersh shed ed Pl Plan anni ning ng

In AC ACTI TION ON

STREETS RUN: HAYS AREA FLOODING

STREETS RUN: HAYS AREA FLOODING

Issue ue:

Flooding occurs for a 2-year design storm and larger events meaning over 0.718” in 15 minutes.

Solut ution ion:

Manage 30% contributing area (pervious or impervious) to eliminate flooding and provide a higher level of service for customers.

Flooding limits from the August 31, 2014 event

We e so soug ught ht the he mo most st ef effe fective ctive pr proje

• jects

cts and nd sy syst stems ems that hat wo woul uld d pr provid

• vide

e com

• mmu

munity nity ben enef efit its in ea n each ch sh shed ed.

We know there are many

documented direct economic GI benefits*…among them are:

The he Cl Clea ean n & Gr Gree een n plan an is is BE BENE NEFI FICIAL AL

*USEPA 2013 - Evaluation of Green Alternatives for Combined

Sewer Overflow Mitigation: A Proposed Economic Impact Framework and Illustration of its Application

• Minimized Business Disruption from

Gray Infrastructure

• Reduced Flood Damage Costs
• Uplift in Property Values
• Increase in Commercial and Residential

Occupancy

• Resident Labor Force Participation

The Clean & Green plan has

triple bottom line benefits.

We modeled our results with

Autocase software to calculate additional values.

The he Cl Clea ean n & G Gre reen en plan an is is BE BENE NEFI FICIAL AL

TRI RIPLE LE BO BOTTOM M LI LINE BE BENEFITS ITS

50 YEAR LIFE CYCLE

TBL TOTAL BENEFIT BENEFIT PER RETROFITTED IMPERVIOUS ACRE

$428M $233,000 $850M $462,000

LOW HIGH

Local Flood Mitigation Property Value Increase Recreational Value Added Economic Water Quality Air Pollution Reduction Heat Island Effect Reduction Carbon Reduction

Advances the establishment of Sustainable Communities by:  Supporting development of proficient green workforces & establishing a career path for skilled GI workers.  Developing Standards for GI Construction, Maintenance, and Inspection  Supports long-term performance of GI facilities. Covers full life-cycle of GI.  Sets national certification standards for GI construction, inspection, and maintenance workers  Designed to meet international best-practice standards

The he PW PWSA SA is a Pa s a Part rtne ner r Or Organ anizati zation

• n in

The he Na Nati tion

• nal

al Gr Gree een n Inf nfra rast stru ruct ctur ure e Cer erti tifi fica catio tion n Pr Prog

• gra

ram

THE E SOLU LUTIO TION TODA DAY: Y: We have a STORM RMWAT ATER ER MAN ANAG AGEME EMENT NT Plan to address:

 Poor Water Quality  CSOs/SSOs  Illicit Discharges – sewage in storm sewers  Surface Flooding  Basement Sewage Flooding  Sewers that are 80 – > 100 years old  Consent Decree and MS4 Requirements

This is a COMPREHENSIVE approach to address the root

• f the problem and not just
• ne of the symptoms.