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 $246,688.82 equates to a 2.47% increase to the original contract.
THE ALTERNATIVES CONSIDERED:
N/A
Which alternative is recommended? Why?
N/A
CONFORMITY TO CITY POLICY:
This item conforms to state and local policies.
FINANCIAL IMPACT:
What is the amount of the revenue/expenditure in the current fiscal year? For future years?
Total amount of $246,688.82 will be encumbered in FY 2026.
Is this a one-time or recurring revenue/expenditure?
One-time
Is this revenue/expenditure budgeted?
Yes, $246,688.82 is available in the Water and Sewer Bonds CIP account 355-56201-900-400-922000.
If not, where will the money come from?
N/A
Is there a sufficient amount in the budgeted line-item for this revenue/expenditure?
Yes
RECOMMENDATION:
Authorize the City Manager, or designee, to execute Change Order No. 1 with Blackrock Construction in the amount of $246,688.82.
DEPARTMENTAL CLEARANCES:
Engineering Services
Finance
City Attorney
ATTACHED SUPPORTING DOCUMENTS:
Change Order Finance Form
Change Order No. 1
Resolution 25-169R
Presentation