Agenda

Addendum [- Revised Bid Table

Cover Location Costs

CS0006-Upstr $3,500.00
BAE-Upsir $3,500.00
BAE-Downsir $3,500.00
Main St-Upstr $3,875.00
Main St-Downstr $6,650.00
Main $1-Downstr $6,650.00
Fairmount-Upstr $2,850.00
Fairmount-Downsir | 2 , 850.00
Broad St-Upstr $2,850.00
Broad St-Downstr $2,856.00
CS0-005 $2,850.00
CSO-003 1$2,850.00
MIH-1 $1,700.00
MH-2 $2,700.00
MH-3 $1,700.00

Total Costs: $49,875.00

Contractor Name: William P. Davis Excavation LLC

To:

From:

Re:

C. Motion:

Attachments:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: December 29, 2016

Noelle Osborne, Plant Operations Supervisor
Wastewater Department

Installation of Siphon Covers

\, THE CITY OF NASHUA “The Gate City’

Financtal Services

ae"

Purchasing Department

NI 2 PR RE NES SENG AT APE TS SAN) 78 RE MES aS

December 29, 2016
Memo #17-087

TO: MAYOR DONCHESS
FINANCE COMMITTEE

SUBJECT: AWARD FOR PURCHASE AND INSTALATION OF SIPHON AND MANHOLE COVERS

(VALUE: $49,875)
DEPARTMENT: 169 WASTEWATER; FUND: WASTEWATER

Ms. Osborne
November 18, 2016
Page 5o0f5

We trust this proposal addresses your needs to evaluate the Wet Weather Facility. We are available to
further discuss this project and fine tune the associated tasks to meet your budgetary constraints or
expectations. We look forward to the opportunity to serve the City.

Very truly yours,
WRIGHT-PIERCE

Timothy Vadney, P.E.
Senior Project Manager

Ms. Osborne wn ,
(PER cscs

November 18, 2016
Page 4o0f5

OD ecees

S. Develop specific recommendations for wet weather flow system modifications, as well as
possible operational/controls changes required to minimize future overflow of untreated
wastewater.

B. Wet Weather Treatment System:

1.

Mis. Osborne
November 18, 2016

Page 30f5

6.

identify equipment, structure, piping, controls or operations related issues affeciing tne Wet
Weather Facility’s capacity to effectively handle and treat the identified design peak flows
reaching the facility;

Develop a capital upgrade plan to address identified issues.

SCOPE OF SERVICES

Based on the present conditions and project objectives listed above, we have developed the following
proposed scope of services:

A. Influent Hydraulic Analysis:

1.

8.

Ms. Osborne
November 18, 2016

Page 2of5

and overflowing the influent sewers. The overflow flooded the paved parking area on the north side of
the wet weather pump station, significantly eroded the adjacent banking, and flowed into the adjacent
wetlands. A large electrical transformer was undermined and taken off line.

Wright-Pierce met with the Plant Operations Staff to discuss their observations of the rain event:

@

SS.

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‘

A Hey gar ieee ED, en Wp gO Weer
Vv = i ir t m tr i i: hee Ee ee WATER ~ WASTEWATER ~ STORMWATER ~ INFRASTRUCTURE

Dm a

Engineering a Better Environment

November 18, 2016
W-P Project No. T11295

Nis. Noelle Osborne
City of Nashua NWTF
2 Sawmill Road
Nasnua, NH 03060

Subject: Letter Proposal for Influent Hydraulic Analysis & Evaluation of the Wet Weather
Treatment System

Dear Ms. Osborne

award in phases to ensure that the evaluation is both fiscally responsible and
provides that the appropriate corrective actions are taken. They are ready to
begin this evaluation immediately.

To:

From:

Attachments:

Discussion:

Citv of Nashua, Public Works Division
i f

Board of Public Works Meeting Date: December 29, 2016

Noelle Osborne, Operations Supervisor
Wastewater Department

Wet Weather Facility Evaluation