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CONTRACTOR'S BREAKFAST - Rivanna Water and Sewer Authority

Nutrient Removal Improvements

Moores Creek Wastewater Treatment Plant

Rivanna Water and Sewer Authority

RIVANNA

WATER & SEWER AUTHORITY

SERVING CHARLOTTESVILLE

AND ALBEMARLE COUNTY, VIRGINIA

CONTRACTOR’S BREAKFAST

November 20, 2008

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP – Existing Site

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP – Project Overview

Current capacity is 15 mgd

Permitted capacity expansion not in this scope

Chesapeake Bay Nutrient Reductions

TN 5 mg/L

TP 0.3 mg/L

Upgrade and replacement of aging infrastructure

Peak flow capacity improvements

Current peak capacity = 18 mgd

Proposed peak capacity = 37.5 mgd

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP – Bidding Information

Tentative Advertise Date: mid - January 2009

Tentative Bid Date: mid - February 2009

Construction Period: 42 months

Engineer’s Estimate of Construction Cost:

$40 to $50 million

Tentative Notice to Proceed: May 2009

RWSA Contractors Breakfast-Nov08-31037.ppt


Proposed Plant Improvements

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Septage Receiving Station

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Equalization Basins

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Aeration Building

RWSA Contractors Breakfast-Nov08-31037.ppt


Aeration Basin Modifications

Must have 4 aeration basins in

service in Winter

Can meet current permit with three

basins in other seasons

Please review Specification section

01520 – Maintenance of Plant

Operations During Construction

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Blower Building

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Secondary Clarifiers 1 and 2

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Secondary Clarifier 3

RWSA Contractors Breakfast-Nov08-31037.ppt


Timing of Secondary Clarifier No.3

Construction

Tertiary Settling Basin must remain in service

until new filters and UV disinfection are

operational

Temporary direct discharge of effluent to creek

to allow tie-in of filters

Demolish Tertiary Settling Basin and construct

Secondary Clarifier No.3

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Sludge Pumping Station

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Tertiary Filters

RWSA Contractors Breakfast-Nov08-31037.ppt


Bid Alternate for Filters

Plans call for construction of eight filter cells

RWSA is receiving bid alternate pricing for

construction of only six filters

Determination of number of filters will be based on

pricing and negotiations with DEQ

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

UV Disinfection Facilities - Trojan

RWSA Contractors Breakfast-Nov08-31037.ppt


RWSA has Pre-Selected UV Equipment

Considered three manufacturers

Received two equipment bids

Selected Trojan UV 3000 Plus

Equipment proposal and pricing

included in GC bid documents

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Digester Complex

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Solids Handling Building

RWSA Contractors Breakfast-Nov08-31037.ppt


Solids Handling Building Improvements

New Centrifuge

Sludge pumping improvements

Chemical systems

Architectural improvements

RWSA Contractors Breakfast-Nov08-31037.ppt


Moores Creek WWTP –

Bulk Chemical Storage Facility

RWSA Contractors Breakfast-Nov08-31037.ppt


Proposed Plant Improvements – Phasing

RWSA Contractors Breakfast-Nov08-31037.ppt


Project Phasing

Overall Contract Time = 42 months

Phase 1

Septage Receiving and Odor Control

12 months from NTP

Phase 2 Milestone

Tertiary Filter Facilities

UV Disinfection Facilities

Chemical storage and feed systems

22 months from NTP

Tertiary Settling Basin Demo after Phase 2 complete

RWSA Contractors Breakfast-Nov08-31037.ppt


Questions

RWSA Contractors Breakfast-Nov08-31037.ppt

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