On August 27, 2019, the Addison City Council approved a contract with JC Commercial, Inc. for the construction of the U.S Customs and Border Protection and Airport Administration facility at Addison Airport in the amount of $6,223,949.
Change Order #1, dated February 28, 2019 approved a cost increase of $22,215.16, thereby increasing the contract amount to $6,246,209.16. Change order #1 included North Texas Tollway Authority irrigation modifications, an Oncor utility relocation, installation of bollards around the Customs and Border Protection generators, and removal of an abandoned water line. Change order #1 was not taken to Council because the amount was less than $50,000 and less than 25% of the contract price. Change order #1 did not add additional days to the contract.
Change Order #2, approved by Council on August 11, 2020, approved a cost increase of $141,881.10, thereby increasing the contract amount to $6,388,090.26. Change order #2 included items that were not anticipated or known at the time of the original contract including additional site fill material, additional depth for foundation piers, changes to the elevator steel structure, and a revision to the CBP holding room toilet and lavatory. Change Order #2 added 25 days to the contract time, pushing the contract completion date to January 17, 2021.
Change Order #3 includes the following additional items that were not anticipated or known at the time of the original contract. It would increase the contract cost by $17,275.41, to $6,405,347.67. This change order will add 27 days to the contract time, moving the contract completion date to February 13, 2021. The change order includes credits for two items that were determined to be either unnecessary or better suited to include in the airside project scope. Change order work includes four items that the contractor was directed to address through Construction Change Directives (CCDs) because waiting for change order approval for those items would either delay the project, add cost, or both. Staff determined that it was prudent, efficient and effective to address the following issues as part of the on-going work:
- Drywall revisions submitted by the plumber to provide additional space behind the drywall needed for plumbing in restrooms on both the first and the second floors of the building.
- Revisions to the landscaping and irrigation to provide more shade-tolerant plantings mainly in the breezeway area, with the irrigation revised to match the changes in the plantings.
- An allowance for equipment rental extensions needed to keep required equipment (a mini excavator and a track loader) on-site beyond the initial rental duration. This was necessitated by the discovery of some discrepancies between the structural and architectural slab edge locations that were introduced when Value Engineering (VE) changes were made in April 2019; the discrepancies were not discovered and resolved until the work was already in progress and some re-work was necessary as a result.
- Construction Change Directive 001 (CCD-001) directs the contractor to proceed with changes to the roof Scuppers and Downspouts. These changes were requested after the Addison Building Permit review of the revised plan set submitted after Value Engineering (VE) changes were incorporated into the plans.
- Construction Change Directive 002 (CCD-002) directs the contractor to proceed with changes associated with the installation of Raco Wall Supports. Drywall framing installed for the walls between the ‘Pre Processing 103’ and ‘Post Processing 102’ rooms have glass and aluminum framing that form the top half of the wall. This does not allow the stud framing to run continuously from the floor to the deck above. Wall support elements were installed below the windows inside the 3’6”-tall section of drywall framing to brace the wall from overturning/folding if a lateral force is applied in the middle of the wall.
- Construction Change Directive 003 (CCD-003) directs the contractor to proceed with changes associated with proposal #34 to avoid any additional delays. Proposal #34 addresses and corrects discrepancies in the finishes specified for door hardware relative to the curtainwall and interior glazing systems, which were discovered in the submittal review process.
- Construction Change Directive 004 (CCD-004) directs the contractor to proceed with changes associated with proposal #41 to avoid any additional delays. Proposal #41 provides for changes in the door hardware on the door at the northeast corner of the building. The architects treated this door as an emergency exit only, whereas the airport staff had anticipated using it for access to/from the regulated garbage handling area and airside vehicle parking on the north side of the building. The discrepancy was discovered and addressed during a review of the keying schedule for the building.
- The light and camera pole at the Northwest side of the building are proposed in a location that will conflict with airside construction. Therefore, the light and camera pole concrete foundation and erection of the pole will be removed from this contract. The airside project contractor will perform installation of this light and camera pole with foundation as well as extend the conduit to the proposed pole location. JC Commercial will provide the light pole to the airside contractor. JC Commercial will still be responsible for the installation of the wiring, fixtures, and cameras upon completion of the light pole foundation performed by the airside contractor. This change resulted in a credit for work not being performed.
- Small metal lockers had been proposed for the gang restrooms on the second floor. Airport staff noted this proposal and requested that the lockers be removed from the project scope, as they are unnecessary. This change resulted in a credit for the cost of the lockers.
The following table summarizes the effect of change order #3 on the contract price:
| Description |
Amount |
| Dry Wall Adjustment for Plumbing |
$2,943.10 |
| Landscaping and Irrigation Changes |
$2,723.21 |
| Equipment Delays Due to ASI 02 |
$7,183.18 |
| CCD-001 Scuppers and Downspouts |
$3,478.06 |
| CCD-002 Drywall Support Labor |
$1,078.23 |
| CCD-003 Door Hardware and Mullion Finishes Color Change |
$2,677.03 |
| CCD-004 Additional Hardware for Door |
$886.60 |
| Northwest Security Camera Pole Removal from Project Scope |
($1,612.00) |
| Locker Credit |
($2,100.00) |
| Subtotal |
$17,257.41 |
| |
|
| Amount of this Change Order |
$17,257.41 |
| Original Contract Amount |
$6,223,949.00 |
| Overall Contract (Including Previous Change Orders) |
$6,388,090.26 |
| Revised Contract Amount |
$6,405,347.67 |
| Total % Increase (including change orders #1, #2, and #3) |
2.91% |
This change order requires Council approval because the total amount of all change orders to date is greater than $50,000.
The following table summarizes the effect of change order #3 on the contract time:
| Description |
Calendar Days |
| Dry Wall Adjustment for Plumbing |
5 |
| Equipment Delays Due to ASI 02 |
10 |
| CCD-001 Scuppers and Downspouts |
12 |
| Subtotal |
27 |
| |
|
| Original Contract Start Date |
September 30, 2019 |
| Original Contract Time |
450 |
| Previously Approved Contract Time Extension |
25 |
| Approved Contract Time Extensions this Change Order |
27 |
| New Contract Time |
502 |
| New Contract Completion Date |
February 13, 2021 |
Funding for these changes is from the 7.3% contingency allowance included in the original contract with JC Commercial, Inc. The total contingency allowance for the project is $559,978. Approved and proposed changes remain well within the available contingency allowance. |