Title
Consider a memorandum/resolution authorizing Change Order No. 1 for the 24-inch Highway 195 and Chaparral Road Water Line Project with Blackrock Construction, in the amount of $246,688.82.
Body
DATE: May 19, 2026
TO: Kent Cagle, City Manager
FROM: Andrew Zagars, City Engineer
SUBJECT: Authorize Change Order No. 1 with Blackrock Construction for the 24-inch Highway 195 and Chaparral Road Water Line Project
BACKGROUND AND FINDINGS:
On October 21, 2025, City Council awarded a construction contract in the amount of $9,981,018 to Blackrock Construction for the construction of the 24-inch Highway 195 and Chaparral Road Water Line Project (CCM/R 25-169R). This project, which will enable the transmission of water from the Chaparral Pump Station to the western half of the city is 60% complete. The engineer's construction estimate for this project was $19,983,000.
As this project was being constructed, several changes to the construction plans became apparent. Change Request No. 1 and 2 for a total of $139,346.50 are to install the pipe where it crosses Chaparral Road in two places via bore and casing instead of open cut. Due to traffic issues along Chaparral, this is a much safer construction method. Change Request No. 3 and 4 for a total of $62,070 are for installing the 24-inch pipe via bore instead of open cut in two locations where open cut installation will put two concrete storm drain structures in jeopardy of collapse. Change Request No. 5 and 6 for a total of $9,695 are for two items that were missing in the original design. Change Request No. 7 for $35,577.32 is for using a hot tap at the 20-inch Stagecoach Road tie-in instead of cutting a tee in. After further investigation at this site, staff found that the original tee option will put many people in that area out of water and under a boil water notice. These seven changes will greatly enhance the safety and efficiency of this project. The total increase for Change Order No. 1 of $...
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