2024 01 16 City Council Meeting Packet 1

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TO:  Deb Wallace, City Manager 
FROM:  Kevin L. Helms, Project Manager 
Cc:  Ben Burchfield, Public Works Director 
  April Johnston, Street Superintendent 
DATE:  January 3, 2024 
SUBJECT: N Jackson Street Repairs 
 
Background 
In September the City Council approved an engineering agreement for the Public Works Department to 
move forward with repairs on N Jackson Street.  As part of th e design process, GEOS performed 
geotechnical testing for the City’s Engineer of Record, Gresham Smith.  The purpose of the testing was to 
evaluate the subsurface conditions for design purposes on the roadway repairs. 
 
Three test sites were chosen, and the results showed no base stone under the asphalt at any of the 
locations.  Immediately below the asphalt layer is a layer of fill which met proper compaction in certain 
areas, but failed compaction tests in other areas.  Therefore, it is likely an unknown amount of cut and fill 
will be needed during construction.   
 
Based upon the above conditions  and the steepness of the slope along the railroad  the engineers have 
recommended a Slope Stability Analysis.  Proceeding without the analysis could result in the designer not 
properly accounting for the unknown existing slope conditions. 
 
We have included in your packet a copy of the proposal from GEOS to perform the Slope Stability Analysis.  
The proposal is for three tests to be performed at a cost of $3,000.  If the initial results indicate the need 
for additional test sites, each additional site will be billed at $750.  Currently, the City has saved $2,594 on 
the design work due primarily to providing traffic control with our own forces, and because data collection 
was less than anticipated.  In the event more than three test sites are needed, the savings are sufficient 
to cover the cost of up to three additional test sites. 
 
Action Item 
Approve the GEOS proposal as presented to perform the Slope Stability Analysis so we can move forward 
with project design. 
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