07 - ENGINEERING SERVICES CONTRACT FOR HYDRAULIC ANALYSIS OF BIG SANDY CREEK, TRIBUTARIES 4 & 6Item No. 7
memorandum
TO: City Council
John Godwin, City Manager
FROM: Carla Easton, PE, City Engineer
SUBJECT: ENGINEERING SERVICES CONTRACT FOR HYDRAULIC ANALYSIS
OF BIG SANDY CREEK, TRIBUTARIES 4 & 6
DATE: August 17, 2016
BACKGROUND: In April and May of this year, the City of Paris experienced rain events
causing localized flooding of properties along Big Sandy Creek. In response to the call for
drainage improvements citywide, Council authorized drainage related projects that will alleviate
flooding potential, and requested specific attention to locations where flooding resulted in
property damage. Many of the drainage channels have been cleared of debris and overgrowth,
which will improve flow in the ditches and creeks. However several reaches need a detailed
analysis to determine where and why the existing system is deficient so that appropriate
improvements can be designed and implemented. Areas along tributaries 4 and 6 of Big Sandy
Creek suffered severe flooding, and while some sections of this creek have been improved with
past projects, there appears to be locations where the channel is constricted by existing
undersized structures, poorly graded flowlines, and failing structures. A hydraulic analysis is
needed to identify the bottlenecks and provide a comprehensive solution to the drainage issues
along these reaches.
STATUS OF ISSUE: Cobb Fendley & Associates has submitted a proposal for engineering
services to develop a hydraulic model of the subject channel from its upper reaches at E Cherry
Street to the outfall at Clarksville Street. The scope of work includes a full assessment of the
existing channel, an existing conditions hydraulic model, a modified FEMA model, development
of improvement alternatives, construction cost estimates, phased implementation schedule for
project planning, and a full report of findings to Staff and Council. The fee for services is
$79,910, and upon Council approval, would be paid from the drainage fund.
RECOMMENDATION: Authorize the City Manager to execute a contract with Cobb Fendley
& Associates for an amount not to exceed $85,000.