In 2012, the Town began implementation of a bond program which included several infrastructure related projects. One of those project is the Midway Road Revitalization project. Midway Road is experiencing various stages of failure due to the age of pavement, traffic, and a saturated subgrade. The scope of the work includes the reconstruction of the concrete road, replacement of the sidewalks, removal and replacement of the existing medians, and Oncor lighting. The Addison voters approved $16,000,000 in bonds for the reconstruction of the roadway.
Design for the Midway Road project was awarded to Teague, Nall and Perkins, Inc. (TNP) and the design work began in October 2014. The Town received the 30% submittal and cost estimates in June 2015. The cost estimates indicated that the cost of the project was projected to be approximately $38,000,000, which was significantly higher than the available budget of $16,000,000.
Design for the project was placed on hold, pending a discussion with Council to determine if the project was still viable. During this time, the design consultant TNP was asked to perform several out-of-scope value engineering items to aid the Town in the decision whether to continue the project. The Council also has asked staff to add the Master Transportation Plan elements into the project. These out-of-scope items and other additions necessitate a change order to the original design contract. A detailed list of the changes is provided below:
1.) Out-of-scope tasks. Additional value engineering tasks (already performed) to assist the Town in identifying the best path forward for the project given the significant funding deficit. The tasks included additional meetings, project management, construction cost opinions, pavement section alternative analysis and life-cycle cost evaluation, coordination with the Town’s geotechnical consultant, utility condition assessment research and coordination, evaluation of drainage options, drainage analysis discussions and coordination with the Town’s drainage consultant. Additional cost will also go towards replenishing the water and wastewater budget as it was previously shifted, on authorization from the Town, to cover extra utility and field surveying efforts. $158,500 increase in contract value.
2.) Re-kickoff/reboot of the project after hold. After being on hold for 2.5 years there are certain associated costs that will be incurred to account for any changes to the project corridor that may have happened over that time. The design engineer will need to evaluate the project corridor for changes in ownership, development, utilities, etc. and perform supplemental design survey and Subsurface Utility Exploration (SUE) to capture changes. Supplemental survey will be required to incorporate the sidepath trail into the design for the project corridor. Validation of Halff’s (the Town’s drainage consultant) drainage study as it relates to the Midway Road storm drain design and base drainage design. $30,700 increase in contract value.
3.) Additional scope. Additional scope will have to be incorporated to account for the addition of the sidepath trail into the design to adhere to the Town’s Master Transportation Plan. Update the roadway concept plan to incorporate a 10’ wide sidepath trail along the west side of Midway Road between Spring Valley and Belt Line as well as widening of the center median by 2’ between Spring Valley and Belt Line. Provide additional design services for the detailed design of the sidepath trail per the updated concept plan, up to ten (10) additional ROW exhibits and descriptions as necessitated by the incorporation of the sidepath trail and ROW negotiation/acquisition services for up to ten (10) additional parcels as necessitated by the incorporation of the sidepath trail. Additional traffic signal scope to include complete traffic signal design for five (5) intersections and temporary traffic signal design for eight (8) intersections (up to four (4) setups to facilitate construction phasing). Additional overall project management to be included into this cost. $257,300 increase in contract value.
4.) Rate change adjustment. Adjustment of billing rates to account for changes in market conditions, staffing, inflation, etc. that have occurred since the original contract was executed three years ago. $140,000 increase in contract value.
5.) Miscellaneous Roadway Design Elements. Various tasks to include traffic control sequencing during construction, roadway design elements including retaining wall design along the sidepath trail and tree removal coordination and discussion with the Town and the adjacent property owners. $92,000 increase in contract value.
6.) Contingency. Money the Town can authorize to the design engineer if unforeseen or unanticipated tasks arise during the design phase of the project. Will be distributed with approval from the Town. $100,000 increase in contract value.
7.) Additional 208 days for design. This time extension is required due to the unanticipated design changes that have occurred over the last 3 years. The original design was taken to 30% concept design completion. Some re-work will be necessary to bring the project back up to 30% and a re-submittal will be required due to the additional trail features along the project corridor. Staff is shifting the project forward and including an additional 208 days to account for changes and additional items.
The total cost of these items is $778,500. The table below summarizes the costs:
| Change |
Amount |
| Out-of-scope tasks |
$158,500 |
| Re-kickoff/reboot of the project after hold |
$30,700 |
| Additional scope |
$257,300 |
| Rate change adjustment |
$140,000 |
| Miscellaneous Roadway Design Elements |
$92,000 |
| Contingency |
$100,000 |
| Total |
$778,500 |
$3,000,000 of the $16,000,000 in bonds were sold in 2014 for design and project management services. Of that $3,000,000, $2,566,385 has been encumbered or spent for these services along with $46,985 for additional geotechnical services. The remainder of unencumbered funds is $386,630. Because there is not enough to cover the entire cost of the design in the current issuance, additional bond funds in the amount of $391,870 would need to be issued prior to completion of design.
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