route 15 wastewater study - october 4, 2010

8/8/2019 Route 15 Wastewater Study - October 4, 2010

1/12

Project Overview

Route 15 Wastewater Study,

,

Dave Prickett, P.E.Project Manager/ Associate

, .


2/12

Pro ect Area

Route 15 Stud Area

Corridor along Route 15

Only east side of Route 15

Approximately 600 acres and 80parcels (40-50% of land developable)

15

from CWMP) bounded by

I-84

Main Street

Mashapaug Road

u ne aug ver


3/12

Pro ect Ob ective

Evaluate Wastewater Mana ement Alternatives in

Route 15 Study Area Collection

Sewer (gravity, low pressure, pump station, force main)

Non-Sewer (septic systems) rea men

Centralized (Sturbridge WWTF)

-

Disposal

Surface water (Sturbridge WWTF Outfall to Quinebaug River)

Groundwater (Subsurface disposal)


4/12

Summar of Alternatives

m s o o en a

Collection System

rea men an

Disposal atSturbridge WWTF

rea men a

Sturbridge WWTFand GroundwaterDisposal w ithinRoute 15 Study

rea men a

Satellite WWTFand GroundwaterDisposal in Route

15 Study AreaArea

Route 15 Sewer Only Alternative 1A Alternative 1B Alternative 1C

Route 15 Sewer andFuture Service Area

Alternative 2A Alternative 2B Alternative 2C

Route 15 Sewer andExpanded Service Area

Alternative 3A Alternative 3B Alternative 3C

1. Alternative 4 is no-action alternative; continued reliance on septic systems


5/12

Sewer System Alternative 1A

Conce t

Gravity sewer (5,700 feet) fromMobil to gas main crossing

Pump Station near gas main crossing

Force main/low pressure sewer(10,200 feet) from pump station to

ur r ge

Comments

erves on y eas s e o ou e

Limited potential for futureexpansion

$5M capital cost


6/12


Concept

Gravity sewer (10,200 feet) fromMobil to north of gas main crossingand down Kelly Road

Pump Station near Kelly Road andRiver Road

Force main/low pressure sewer(16,500 feet) from pump station toSturbridge WWTF

Comments

Serves Kelley Road

Facilitates future sewer expansionwithin Special Zoning District

$8M capital cost


7/12


Features

Expanded gravity sewer (27,900feet)

ump a on near e y oa anRiver Road

Force main/low pressure sewer,

Sturbridge WWTF

Comments

Larger service area to increase lots

served and reduce unit costs

$13M capital cost


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Preliminar Ca ital Costs

Limits of Potential Treatment and Treatment at Treatment at

Sturbridge WWTF

and GroundwaterDisposal w ithinRoute 15 Study

Area

and GroundwaterDisposal in Route

15 Study Area

Route 15 Sewer Only Alternative 1A

$5M

Alternative 1B

$8M

Alternative 1C

$14M


Alternative 2A$8M

Alternative 2B$12M

Alternative 2C$19M

Expanded Service Area

$13M

$18M

$26M

1. Alternative 4 is no-action alternative; continued reliance on septic systems


9/12

Potential Betterment Costs Per Parcel

Limits of Potential Treatment and Treatment at Treatment at

Sturbridge WWTF

and Groundwater

Disposal withinRoute 15 Study Area

Groundwater

Disposal in Route 15Study Area

Route 15 Sewer Only Alternative 1A

$15,000-$3,100,000

Alternative 1B

$24,000-$5,000,000

Alternative 1C

$42,000-$8,700,000


Alternative 2A$22,000-$4,700,000

Alternative 2B$33,000-$7,100,000

Alternative 2C$52,000-$11,000,000

Expanded Service Area

$21,000-$4,600,000

$29,000-$6,400,000

$42,000-$9,200,000

Notes:

1. Alternative 4 is no-action alternative; continued reliance on septic systems2. Typical cost for residential septic system is $20,000 to $30,000

3. Challenging cost apportionment: large lots; partially developed; few lots with majority of development


10/12

Wastewater Recommendations

High capital costs

No current WWTF capacity available Challenges to obtaining sewer extension permit

Route 15 (Study Area 19) is not part of Recommended Plan inCWMP

Potential Future WWTF Flow Increase

Construction/upgrade on-going

EPA/MassDEP negotiation period

Sewer expansion (Alternatives 1, 2 and 3) shouldbe tabled for approximately 3 years

-groundwater disposal (septic systems)


11/12

Water System Alternative

Features

Extend 12-inch water main fromShattuck Road south to Mobil

Comments

Existing water main is close to

Capacity available

Lower cost than sewer alternatives

Provides fire flow service to Route15 corridor

.


12/12

Water Recommendations

Proceed w ith Plannin for Water Main Extension

Conduct follow-up public informational meeting

Explore funding sources

Rural Development

Window of grant eligibility is closing (post-2010 census)

Pursue other economic development funding sources

Conceptual Project Implementation Schedule

Planning (Fall 2010 through Spring 2011)

Town Meeting (Spring 2011)

Design (Summer/Fall 2011)

Construction (2012)

route 15 wastewater study - october 4, 2010

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