Cleveland Public Library Photograph Collection

NEORSD• 62 Member Communities• 1 Million People• 370 Square Miles• Ave. Daily Flow – 310 Million Gallons• Combined Sewers - 35%• Separate Sanitary Sewers - 65%

Sewer Overflow

• Northwest Interceptor• Cuyahoga Valley Interceptor• Southwest Interceptor• Heights/Hilltop Interceptor• Mill Creek Tunnel

Five Major Interceptor Systems

SOUTHWEST INTERCEPTOR

CUYAHOGAVALLEYINTERCEPTOR

SERVICE AREA MAP

HEIGHTS/HILLTOPINTERCEPTOR

MILL CREEK TUNNEL

NORTHWESTINTERCEPTOR

SYSTEMCAPITAL COST$25

MILLION

$75 MILLIO

N$210

MILLION

$260 MILLIO

N$150

MILLION

Mill Creek Tunnel Overview

• Recommended in 1997 Facilities Plan• To be built under three contracts,

MCT-1, 2, and 3• 43,000 feet; 20 ft. Diameter; Depths

up to 300 ft.• Estimated Construction Cost = $150

Million

R i ver

M ill

Mill

W o lf

C reek Cree

k

C reek

HighlandHeights

M ap leHeights

C uyahogaHeights

N ew burghHeights

G arfieldHeights

B ed ford

Va lleyV iew

Indep endence

C leve land

N orthR anda ll

C alvaryC em etery

E. 93 St.

Martin Luther King Dr.

E. 131 St.

East Blvd.

P uritan Ave.

M cC raken R d .

L ibb y R d .

B roadway Ave.

Lee Rd.

Wa rr en sv ille C en te r R d.

N ort hfi eld R d.

E. 49th St.

E. 71st St.

Warner Rd.

G rang er R d .

C uyaho ga

C anal R d .

G rant A ve.

Turney R d .

G arfield B lvd .

B ro adway Ave.

JohnsonParkway

Tark ing to nAve.

M iles R d .

G arfieldP ark

R eservation

M TC - 1M TC - 2M TC - 3D ro p S haftM ill C reek In te rcep to r

" P r otecti ng Y our C l ea n W ater I nvestment "

Impacts of the Mill Creek Watershed Program

• Provide over 70 million gallons of storage in new tunnel

• Eliminate 13 overflows entirely (27 now exist) • Reduce annual overflow from over 500

million gallons to 14 million gallons• No remaining overflows should activate more

than an average of 5 times per year

Large Tunnel Construction

TBM• Diameter – 23’ 8”• Length – 60’ / 200’ with

trailing Gear• Weight – 700 tons• Production – 55’ / day /

8’ per hour• Spoils – 17 cubic ft. per

linear foot• Cost - $10-15 million

Tunnel Boring Machine

•Blasting•Work Hours•Spoil Handling &

Disposal

Key Construction Issues

BlastingKey Construction Issue

• Peak particle velocity held to less than 0.5 in/sec at nearest structures

• Air-overburden Pressure Shall not Exceed 133 Decibels

• Pre-Blast Survey

Perception

Placement of ChargesResults at Surface

Key Construction IssueBlasting

Blasting

RealityKey Construction Issue

• Key concern to prospective bidders

• Affects ability to construct shafts, mine tunnel, and remove spoils

• One shift operation will add 1+ years and $5 million to the project

Work HoursKey Construction Issue

Spoil Handling & Disposal• Who owns the tunnel spoils?• 24’ diameter TBM produces 1400

cu.ft. of spoil material during 2/8 hour shifts.•140 trucks per day•12 trucks per hour•1 truck every 5 minutes

Key Construction Issue

• Volume of excavated material from MCT-2 70 feet high.

Spoil Handling & DisposalKey Construction Issue

Spoil Handling & DisposalKey Construction Issue

Public Participation• Inform local officials of the project

during the design process• Keep local officials informed during

design & discuss issues that impact the local community

• Convene public meetings prior to the commencement of construction

CSO Reduction to CSO Reduction to PresentPresent

6270 MG

$44.6

$140.1

$296.1

$572.3

$296.1

$140.1

$44.6

$847.7

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

CSO

Vol

ume

Dis

char

ged

(Mill

ion

Gal

lons

)

$0

$100

$200

$300

$400

$500

$600

$700

$800

$900

CSO Volume Discharged Each Year

Cost

Pres

ent V

alue

Cos

t (M

illio

ns$)

4740 MG

Recommended Control Recommended Control PlansPlans

0

500

1000

1500

2000

2500

3000

3500

Southerly Westerly Easterly

Existing

RecommendedPlans

CSO Reduction by CSO Reduction by 20192019

$847.7

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

-$100

$100

$300

$500

$700

$900

$1,100

$1,300

$1,500

$1,700

CSO Volume DischargedEach YearCost

Pres

ent V

alue

Cos

t (M

illio

ns$)

4740 MG

3500 MG

$1680

CSO

Vol

ume

Disc

harg

ed(M

illio

n G

allo

ns)

Easterly Facilities Plan

• 88,300 of 18’-24’ tunnels• 27 shafts• 160 MGD pump station• Total estimated projected

cost - $1.3 billion

Easterly CSO Storage Tunnel

Impacts of Proposed Easterly Projects

• Provide 152 million gallons of storage in new tunnel

• Eliminate 78 high-maintenance regulators reducing the potential for dry weather discharges

• Reduce annual overflow from 2,560 million gallons to about 450 million gallons

• No remaining overflows should activate more than an average of 4 times per year

Funding• Water Pollution Control Loan Fund (WPCLF)• Administered by Ohio EPA• Low Interest Loan Program• Standard Construction Loan – 20 year based on

1.25% discount below the current GO bond – currently 3.78%

• NEORSD has received 33 loans representing $387 million

• WPCLF has financed 53% of District jobs since 1991

a gift of clean water