Rancho Palos Verdes City Council
   

APRIL 5, 2005 STORM DRAIN REHABILITATION APRIL 5, 2005 STORM DRAIN REHABILITATION

TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL

FROM: DIRECTOR OF PUBLIC WORKS

DATE: APRIL 5, 2005

SUBJECT: STORM DRAIN REHABILITATION

STAFF COORDINATOR: Ron Dragoo, Senior Engineer

RECOMMENDATIONS

  1. Approve the Plans and Specifications for the construction of the Storm Drain Rehabilitation Project for eleven Storm Drains.
  2. Award a Construction Contract to Sancon Technologies, Inc. in the amount of $332,960, for the Rancho Palos Verdes Storm Drain Rehabilitation Project; award a contract to Charles Abbott and Associates, Inc., for Construction Inspection services in an amount not to exceed $35,000, and authorize staff to spend up to $67,000 for possible extra work; thereby approving a $434,960 construction budget.
  3. Authorize the Mayor and City Clerk to execute a construction contract with Sancon Technologies, Inc. and execute contract for construction services with Charles Abbott Associates.

BACKGROUND

The recently completed Master Plan for Storm Drains identified a number of storm drain deficiencies. As presented discussed in a June 2004 report to the City Council the deficiencies can be categorized into four types:

  • The pipe is too small to convey the design storm
  • There are not adequate inlets to the pipe to pick up street drainage and flooding occurs
  • The pipe has the wrong configuration and discharges drainage at an unacceptable location
  • The pipe has deteriorated to such a degree that its ability to convey drainage is reduced, and pipe collapse is possible. Corrugated metal pipes (CMPs) are most likely to deteriorate.

The June 2004 report recommended a program of storm drain lining for those deficiencies related to pipe deterioration. The adopted budget includes funding in the amount of $500,000 for storm drain lining.

ANALYSIS

Sealed bids were received and opened at 11:00am March 23, 2005. Sancon Technologies, Inc. submitted the lowest responsible and responsive bid of the four received. The following table summarizes bids:

BID SUMMARY

CONTRACTOR

BID AMOUNT

Sancon Technologies, Inc.

$ 332,960

Southwest Pipeline and Trenchless Corp.

$ 346,875

Wesco Infrastructure Technologies

$ 435,508

Zondiros Corp.

$ 739,800

Engineer’s Estimate

$ 330,000

The bids were reviewed for consistency with bid requirements. References were contacted and reported satisfactory or above performance on similar projects. The low bidder is satisfied with his bid and is ready to go to work. The relatively small (0.9%) difference between the Engineer’s Estimate and the low bid is within an acceptable range for Public Works construction projects.

This project will repair, by lining, eleven corrugated metal storm drain lines in the City. Many of the storm drain lines are missing sections of the invert (bottom) of the pipes. It is common to encounter areas where running water has removed soil beneath the pipe that must be repaired prior to lining the pipe. Although all the lines included in this project have been video taped and inspected for these types of defects, staff is anticipating that some areas will require additional/extra work that has not been identified in the scope of this project. Staff is requesting a construction contingency of $67,000 (20%) that would be used in the event of changed construction conditions require additional work.

Construction inspection services are needed for this project and an on-call service provider, Charles Abbott Associates, can provide this service for the City. The City has recently used Charles Abbott Associates to provide inspection services for the emergency work that was performed at Western and Delasonde. Staff is satisfied with the work performed by Charles Abbott Associates. Staff recommends that Council authorize the Mayor and City Clerk to execute a contract with Charles Abbott Associates for the City of Rancho Palos Verdes Storm Drain Rehabilitation Project.

Funds for this project have been set aside through the Storm Drain Lining Program, Project Number 002105.

CONCLUSIONS

Adopting staff’s recommendations will result in approving the Plans and Specifications for the construction of the Storm Drain Rehabilitation Project, awarding a construction contract to Sancon Technologies, Inc., awarding a contract for professional services to Charles Abbott Associates, and authorizing the Mayor and City Clerk to execute those contracts.

FISCAL IMPACT

The adopted FY 04-05 Budget includes adequate funding for this project in the Capital Improvement Program Fund.

Submitted by,

Dean E. Allison

Director of Public Works

Reviewed,

Les Evans

City Manager