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agenda-report NOTICE OF COMPLETION FOR THE AREA 2 RESIDENTIAL & COLLECTOR STREETS REHABILITATION AND THE GOLDEN SPRINGS DRIVE ARTERIAL STREET REHABILITATION BETWEEN BREA CANYON ROAD AND GRAND AVENUE - PROJECT NO. SI23102 & SI23103.

Diamond Bar City Council
November 7, 2023

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agenda-report NOTICE OF COMPLETION FOR THE AREA 2 RESIDENTIAL & COLLECTOR STREETS REHABILITATION AND THE GOLDEN SPRINGS DRIVE ARTERIAL STREET REHABILITATION BETWEEN BREA CANYON ROAD AND GRAND AVENUE - PROJECT NO. SI23102 & SI23103.
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November 7, 2023
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Diamond Bar City Council
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Agenda #: 5.6
Meeting Date: November 7, 2023
TO: Honorable Mayor and Members of the City Council
FROM: Daniel Fox, City Manager
TITLE: NOTICE OF COMPLETION FOR THE AREA 2 RESIDENTIAL &

COLLECTOR STREETS REHABILITATION AND THE GOLDEN

SPRINGS DRIVE ARTERIAL STREET REHABILITATION BETWEEN
BREA CANYON ROAD AND GRAND AVENUE - PROJECT NO.

SI23102 & SI23103.

STRATEGIC
GOAL: Safe, Sustainable & Healthy Community
RECOMMENDATION:

Approve, and authorize the Director of Public Works/City Engineer to file, the Notice of Completion.

FINANCIAL IMPACT:

The Fiscal Year 2022/23 Capital Improvement Program included $3,300,000.00 in funding for this Project. The final construction cost of the Project, including one change order, is $3,186,620.05, which is $113,379.95 under the total authorization amount of $3,300,000.00 (Construction Agreement: $3,087,262.50, Contingency: $212,737.50).

BACKGROUND/DISCUSSION:

On March 21, 2023, the City Council awarded a construction contract to Copp Contracting, Inc. (Copp) for a total authorization amount of $3,300,000. The City issued the Notice to Proceed for the construction work on April 17, 2023.

The Project encompassed the improvements of 12 centerline miles of residential and collector streets through the application of slurry seal, chip seal, localized asphalt concrete (AC) dig-outs, and curb ramp enhancements based on field conditions in the City’s Roadway Pavement Area 2. Additionally, Golden Spring Drive roadway pavement was rehabilitated with AC grind and overlay, enhanced bike lanes, improved signage and striping, and ADA curb ramp upgrades.

Initially, the plan involved grinding and overlaying Golden Springs Drive between Brea Canyon Road and Lavender Drive. However, due to the prolonged use by LA Engineering’s construction crew of the driveway access adjacent to Golden Springs Drive for the Grand Avenue/Golden Springs Drive Intersection Improvements Project, and briefly by the contractor of the Diamond Bar Golf Course Renovation Project, City staff decided to end the improvements at the golf course driveway, approximately 450 feet west of Lavender Drive.

This decision was to prevent any potential damages to the recently laid asphalt pavement improvements by construction vehicles and trucks. City staff formally reached out to both project managers representing the City of Industry and the San Gabriel Valley Council of Governments (SGVCOG), requesting the incorporation of this roadway segment into the asphalt paving phase of the Grand Avenue/Golden Springs Drive Intersection Improvements Project.

Moreover, as part of the 57/60 Confluence Project, the recently paved section along Golden Springs Drive between Adel Avenue and Copley Drive has undergone restriping and lane closures by the contractor (Skanska) to facilitate their traffic control for the ongoing undercrossing and sewer line work. This roadway segment will be rehabilitated by the contractor and the SGVCOG after this current phase is completed.

Copp completed all necessary work on October 6, 2023. A single Change Order, in the amount of $99,357.55, was authorized by the City. This change order primarily addressed adjustments in quantities, encompassing additional removal and replacement of curbs/gutter, concrete sidewalks, curb ramps, quantity overages on AC overlay, unexpected petromat (asphalt paving fabric) along Golden Springs Drive, and the application of slurry seal and striping at the intersection of Golden Springs Drive and Brea Canyon Road.

PREPARED BY:

REVIEWED BY:

Attachments:

1. 5.6.a Notice of Completion

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