HomeMy WebLinkAboutCORRESPONDENCE - GENERAL CORRESPONDENCE - WORK ORDER HYDRAULIC MODELING TASK 3Christian J. Cece, P.E.
Special Projects Manager
City of Fort Collins Utilities
700 Wood Street
P.O. Box 580
Fort Collins, CO 80522-0580
Reference: Wastewater Collection System Model & Master Plan
Hydraulic Modeling, Task 3
Dear Chris:
October 8, 2003
NI-5652-CC
SL# 25245
As requested, we are providing you with a scope and budget for the above referenced task as a
part of the Wastewater Collection System Model & Master Plan This Scope of Services reflects
our understanding of the task based on the data collection we have completed and our meetings
and discussions with you. Included is a detailed Scope of Services and a fee estimate based on
the hourly rates set forth in our Master Agreement.
We have begun to assimilate the collected data and started inputting it into the model. The model
will be built to reflect the actual system as much as possible. Using the information we have
gathered we will make initial runs to calibrate the model and prepare it for the existing system
analysis and for future use.
Please call if you should have any questions or comments, or need additional information.
Very truly yours,
Rothberg, Tamburini & Winsor, Inc.
4 , Ae
Daniel L. Mattson, P.E.
Project Manager
Denver/Colorado Springs/Fort Collins
315 Canyon Avenue/Suite D/Fort Collins, Colorado 80521-2677/(970) 224-5999/FAX (970) 224-0676
HYDRAULIC MODELING TASK 3
For
Wastewater Collection System Model & Master Plan
SCOPE OF WORK
As a part of this Scope of Work, we may request that the City of Fort Collins team assist us in
researching and procuring critical data (that we were unable to obtain through our planned
methods) that may be needed for the building and calibration of the waste water system model.
Outline of Proposed Tasks:
SUBTASK 1. DATA ASSEMBLY AND INPUT PREPARATION
a. Collect survey data on the manholes. Input the data into the model and determine
which manholes have missing information. When possible make assumptions on
missing information if it is not critical to the operation of the model. If missing
information is deemed critical to the proper operation of the model it will be
procured through some other method (i.e. additional survey, archived record
drawings or design drawings, etc.). All of the data and assumptions will be
provided to the City during the process for their review, approval and ultimate
use. If additional survey data is needed it may be an addition to this scope of
work.
b. Review flow -monitoring information in order to establish Manning's "n", diurnal
curves for different types of land use, and infiltration and inflow for different
areas throughout the system. This information will be presented to the City for
approval to use in the analysis of the existing system.
C. Collate the loading information provided from the City's database and distribute it
appropriately throughout the model.
d. Review drawings, reports, and other information provided by the City to fill in
"gaps" in other information collected.
SUBTASK 2. INITIAL MODEL RUN AND CALIBRATION
a. Using all the information gathered, collated, and input into the model, several
computer model runs will be completed to correct errors and determine additional
data needed to insure proper model operation.
b. Once all the information is corrected, calibration runs will be completed using
monitoring points in order to produce a calibrated working model.
SUMMARY OF FEES:
Hydraulic Modeling Task 3
Subtask 1. Data Assembly and Input Preparation $7,545
Subtask 2. Initial Model Run and Calibration $ 8,070
TOTAL $ 15,615
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