Title
Change Order to the Construction Contract for the NW 22nd Street Milling and Resurfacing Project (B)
This involves a request to approve a Change Order for the construction contract, NW 22nd Street Milling and Resurfacing Project, in order to provide a better final product and to compensate for unknown site conditions.
Explanation
On November 15, 2012, the City Commission approved staff's recommendation to award a bid to R.E. Arnold Construction, Inc., for the NW 22nd Street Milling and Resurfacing project in accordance with approved plans and specifications.
Change Order #4 includes several items. The price change and justification are included in the attached details and presentation. A basic outline of changes is shown below.
Unsuitable material was found during the pipe installation under NW 1st Avenue and NW 22nd Drive which caused the unsuitable material to be excavated and replaced or face a high probability of premature roadway and pipe failure. “Earthwork - Cut” item was added for an increase of $19,698.48. “Earthwork - Fill” item was added for an increase of $12,625.47.
Additional measures were deemed necessary to ensure the bus stop near the discharge of the pipe installation was not a safety concern due to steep slopes and drop offs. Quantity of “Concrete Class NS, Gravity Wall” item was overrun for an increase of $1,533.60. Quantity of “Concrete Ditch Pavement, 4 Inch” item was overrun for an increase of $729.00. “Hand Rail” item was added for an increase of $1,542.13.
The slopes behind the widened sidewalk were steeper than the survey showed. This caused it necessary to add curb to the back of the sidewalk in order to tie into natural grade at a reasonable slope. Quantity of “Concrete Curb and Gutter, Type D” item was overrun for an increase of $9,040.
The sidewalk adjacent to the installed ADA ramp at the NE corner of 5th Avenue and 20th Street was severely cracked and did not meet ADA compliance for slope. This concrete was removed a...
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