8.6 Water Distribution ModelingCITY OF SALINA
REQUEST FOR CITY COMMISSION ACTION DATE TIME
11/06/06 4:00 P.M.
APPROVED FOR
AGENDA SECTION ORIGINATING DEPARTMENT:
NO: 8 AGENDA:
DEPARTMENT OF PUBLIC WORKS
ITEM
NO. 6
BY:
BY: Martha Tasker
Page 1
ITEM:
Engineering agreement with Professional Engineering Consult ants, P.A. for the 2007 Water
Distribution Modeling, Project No. 06-1616.
BACKGROUND:
The City’s water distribution system consists of eight elevated storage tanks on five separate
pressure zones, 2300 fire hydrants and 315 miles of water mains. The 2006 Capital Improvement
Program includes a project to develop a calibrated computerized hydraulic model of the entire water
distribution system, which will dete rmine how the five pressure zones interact or respond during
various demands and conditions. System perfo rmance testing will be conducted on the water
distribution system by flowing a portion of fire hydrants per industry standards for water model
calibration. The calibrated working model will utilize H aested Water GEMS software, which will be
purchased by the City under a separate contract. The calibrated hydraulic model of the water
distribution system will reflect the fire hydrant flow conditions and will be utilized to predict the water
distribution system’s performance under current conditions/demands. The calibrated hydraulic model
will be utilized to analyze the existing high service and booster pumps and distribution system
components, evaluate performance, capability of serving development, and meet pressure
requirements during average daily demand, maximum daily demand, peak hourly demand, and under
fire suppression demands.
A final report will summarize the findings, including the water distribution system mapping, the model
(including an input data disk) and a general Capital Improvement Program to update the water
distribution system to meet current demands. Tw o days of start-up and model training will be
provided. Typical updates and model runs will be provided for three years after the completion of the
calibrated computer model. This comprehensive Capital Improvem ent Project will be beneficial in
developing future budgets, confirming pressures and predicting available domestic and fire flows for
existing and proposed developments.
An open Qualifications-Based Selection (QBS) method was utilized to se lect the consultant for this
project. A total of seven consultants were sent Request For Proposals and each submitted
proposals. Each proposal was rated using nine (9) criteria by six staff members of the Public Works
Department. The firm of Professional Engineering Consultants, P.A. of Wichita received the highest
combined rating.
The contract before you today, for the Water Distribution Modeling, is written on the basis of Standard
Contract Hourly Rates, with a not-to-exceed maximum cost of $102,028. The “cost” includes all direct
payroll, direct non-payroll and overhead (indirect cost). The “cost not-to-exceed” is just that, a total
amount that can not be exceeded without prior approval and a supplemental agreement with the City
Commission. The attached contract also addresses the scope of work, consultant’s responsibilities,
time schedule and general provisions.
If requested, Phase II scope of services and fees will be negotiated at the completion of Phase I.
The calibrated hydraulic model will be utilized to develop a Capital Improvement Program to upgrade
the water distribution system to meet projected demands through the year 2030. It is hoped that the
timing of Phase II will coincide with development of the City’s Comprehensive Plan.
CITY OF SALINA
REQUEST FOR CITY COMMISSION ACTION DATE TIME
11/06/06 4:00 P.M.
APPROVED FOR
AGENDA SECTION ORIGINATING DEPARTMENT:
NO: 8 AGENDA:
DEPARTMENT OF PUBLIC WORKS
ITEM
NO. 6
BY:
BY: Martha Tasker
Page 2
FISCAL NOTE:
A budget allocation of $100,000 for the Water Distribution Modeling is included in the 2006 Capital
Improvement Program under the category of Water/Wastewater Enhancements.
RECOMMENDATION:
It is recommended that the City Commission approve the Engineering Agreement with Professional
Engineering Consultants, P.A., Wichita, Kansas in an amount not to exceed $102,028.
CC: Professional Engineering Consultants, P.A.
Jim Wendell, Water Plant Superintendent
Jeff Cart, Water Distribution Supervisor