This Change Order includes the following items of work: 1) adds six driveways to the adjacent quarry property and adds acceleration and deceleration lanes to the two driveways in the quarry base, 2) deletes Retaining Wall 6 from the project, 3) adds metal beam guard fence (MBGF) along the roadway for quarry protection, and upgraded MBGF end treatments to new crash specifications, 4) adds Drainage Culvert 10 to channel water to the pond, and 5) provides for additional striping and signing for the IH 35 southbound frontage road (SBFR).

Driveways and Acceleration/Deceleration Lanes:
The right-of-way (ROW) agreement with Texas Crushed Stone (TCS) requires that 6 driveways be installed on the project, however the location determination was not finalized with TCS until after the project was awarded. To enhance the safety to the two main access driveways that are being installed in the bottom of the quarry, it was determined that acceleration and deceleration lanes would be provided. The driveways are directly across from each other and are planned to be the main entrances into the quarry. In this section of the roadway, the pavement will be widened, and the shoulders reduced to accommodate the lanes. Extra time will be added to the Contract for this work.

Retaining Wall 6:
Wall 6 has been deleted from the project. The original plan required the construction of Wall 6 to keep the roadway embankment within the ROW. However, once construction began in the area of the wall, the County and TCS determined the elimination of Wall 6 would be safer for the traveling public and would reduce future maintenance costs. A triangular section of ROW was obtained from the quarry to allow for slope construction.

Metal Beam Guard Fence:
During the project, the quarry excavated adjacent to the ROW requiring the placement of additional MBGF to protect the traveling public and to meet the requirements of the Pit and Quarry Safety Act. Additionally, during the project, the specifications for MBGF end treatments changed.  To utilize the latest crash tested material, we negotiated with the contractor to add the material cost difference to the existing item. 

Drainage Culvert 10:
During construction, the quarry excavated north and west of the project detention pond diverting the water to the east end of the pond. Therefore, it was necessary to place concrete pipe (RCP) to channel the water into the pond on the east end.

Southbound Frontage Road Signing and Striping:
Per Williamson County’s request, the southbound frontage road will be converted to two-way from the intersection with Southwest Bypass to the north. This allows eastbound Southwest Bypass traffic to make a left turn and directly access Inner Loop.