HomeMy WebLinkAboutWORK ORDER - RFP - 7084 CONSULTING ENGINEERING SERVICES (4)EXHIBIT "A"
WORK ORDER FORM
PURSUANT TO AN AGREEMENT BETWEEN
THE CITY OF FORT COLLINS
AND
Ayres Associates
DATED: 01-01-05
Work Order Date: August 16, 2010
Work Order Number: SCP-081610-WaterModel
Purchase Order Number:
Project Title: H20MaD Water Model Assistance and Foothills Tank Analysis
Commencement Date: August 20.2010
Completion Date: Aril 30 2011
Maximum Fee: (time and reimbursable direct costs): $14,000
Project Description: The City of Fort Collins (City) operates and maintains an H2OMao Water Model wherein the
City's water distribution and transmission system is modeled; this also includes analysis of existing service to land
development and of water auality scenarios and emergencies. The model is physically maintained by the Ci • however. .
assistance and back-up is required from consulting
Scope of Services: Ares Associates would Provide water modeling assistance water uali analyses,
emergency/standby assistance and analysis of Foothills Tank including Hiah Service Puma Station
Station. and Southwest Pump
- _-
Service Provider agrees to perform the services Project Q11,ger
identified above and on the attached forms in
accordance with the terms and conditions contained
herein and in the Services Agreement between the
parties. In the event of a conflict between or ambiguity
in the terms of the Services Agreement and this work
order (including the attached forms) the Services
Agreement shall control.
The attached forms consisting of Exhibits 2 pages) are
hereby accepted and incorporated herein by this
reference, and Notice to Proceed -is hereby given.
Service Provider:
By:
Title: Vice C Pcec-,Jo-A
Date: �j (� Ito
CC: Purchasing
City of Fort Collins:
Submitted By:
Daterto
Reviewed By:>� Z��
Se for Utility Engineer
Date:_/�//l�
Reviewed By:
Water Eng Field Operations Mgr.
Date: 8�/ v
Approved By:
Utilities General Manager
Date:
Approved By:
Dir. of Purchasing & Risk Management
Date:
8/10/2010
EXHIBIT A
CITY OF FORT COLLINS
SCOPE OF SERVICES - WATER DISTRIBUTION SYSTEM MODELING
GENERAL
The City of Fort Collins has requested support from Ayres Associates with regard to ongoing
analysis of the City's water distribution system hydraulic model. Selected Ayres Associates staff
approved by the City will provide as -needed hydraulic modeling expertise in collaboration with
City staff to use the hydraulic model to answer capital and operational questions pertaining to
the water system. In addition, in the event of a water distribution system emergency, Ayres
Associates staff will provide on -site real-time operation -of the water model to inform the City's
response effort. Ayres Associates will provide modeling expertise related to general system
hydraulics, fire flows, water storage volumes and operational strategies, water quality modeling,
uni-directional flushing, contaminant modeling, and intrusion sensor placement. Ayres -
Associates maintains a current license of the H2O Map Water software compatible with the
City's license of H2O Map Water or Info Water.
PROJECT OBJECTIVES:
1. To provide additional staff available to the City who are experienced water modelers and
who also are familiar with the City Utility personnel and water treatment, transmission and
distribution system. This outside staffing resource will be available under normal
circumstances as -needed subject to staff scheduling, and on -demand for longer durations
for emergency situation support.
2. To provide additional hydraulic engineering expertise to the City to use the model to
evaluate potential capital projects, operational strategies, and vulnerabilities of the City's
water system.
3. To support capital or development projects that need input on the hydraulic performance of
the water system, including typical pressures, available fire flows, points of connection, and
anticipated water quality.
4. To provide boundary condition information related to consecutive systems, i.e. Colorado
State University, Soldier Canyon Filter Plant and the Tri-Districts, and West Fort Collins
Water District.
TASK 1 Foothills Tank Water Quality Analysis
In the past, the City has experienced a decline in water quality in the Foothills tank which was
indicated by reduced chlorine residual levels. The tank level is maintained by either the
Southwest Pump Station (SWPS) or the High Service Pump Station (HSPS) depending on
several factors including electrical power load shedding goals and a service request from the
Colorado State University Foothills Campus for additional pressure. The conditions present at
the time of the decreased chlorine concentrations have not been studied directly, but are
available from the City's water treatment plant SCADA system. In addition, current operational
conditions may have changed in the meantime and need to be verified. The City has requested
that the water system hydraulic model be used to replicate the water quality deterioration in the
Foothills tank using the City's SCADA data as a guide to demands, pump status and pump
location, tank levels and chlorine dosage., (SCADA data will not be used as a direct input
external boundary condition for the model, as that will limit the predictive ability of the water
Ayres Associates
8/10/2010
quality computations.) Once the model can replicate the historic tank conditions, various
scenarios can be modeled to reflect different conditions of tank water level operating range,
water turnover, tank mixing, pump operational rules, electrical load shedding and demand
variations to identify new operational guidelines for the systems that impact the Foothills Tank.
Potential solutions can be tested in the model to find effective solutions that will improve the
water quality in the tank over a range of demand scenarios. We anticipate testing several
options for solutions, including operational changes, mixing equipment, demand changes, and
pressure zone management strategies. Individual options for analysis will be developed jointly
with City staff. Ayres Associates staff will complete the modeling work and will provide the City
with a copy of the resulting model and scenarios and will provide the City with hands-on
interaction of the scenarios analyzed. Approximately 60 staff hours are anticipated, including
three coordination meetings with City staff. A current copy of the water model and the relevant
SCADA data from the time period in question are requested from the City.
TASK 2 — As Needed Hydraulic Model Support
As requested by the City, Ayres Associates staff can attend cooperative model development
meetings, provide hydraulic analysis, fire flows or water quality analysis when other City staff
are not available, support the City water operations through use. of the water model during a
water quality incident, and provide hydraulic engineering input to City operational practices.
Ayres staff can also help the City update demand patterns used in the hydraulic model. Ayres
will provide staff to the City as needed based on City direction. We anticipate meetings every
two weeks, plus prep and follow up time, constituting approximately 12 hours a month as
needed.
BILLING AND RATES
The proposed work will be completed on a time and materials basis, based on the attached
Ayres 2010 Professional Services Rate Schedule. A breakdown of work effort and anticipated
fees is shown below. Monthly invoices will be submitted to the City Project Manager (Sue
Paquette).
Task 1 — Foothills Tank Water Quality Analysis $8,200
Task 2 — As -Needed Hydraulic Model Support. $5,800
Total Contract Amount
$14,000
SCHEDULE
Ayres Associates is available to begin work upon notice to proceed from the City.
2 Ayres Associates