Consideration and Approval of Construction Contract:  Shadow Mountain Phase I: Linda Vista Valley gutters.

1. Approve the construction contract with Eagle Mountain Construction, Inc. in the amount of $212,566 with a 90 day contract time ;
2. Approve change order authority in the amount of $21,256 (10%) of the contract amount to cover potential costs associated with unanticipated items of work; and
3. Authorize the City Manager to execute the necessary documents.

 

Subsidiary Decisions Points:

• Policy Decision or Reason for Action:
  • Provide construction phase services for the Shadow Mountain Phase I: Linda Vista Valley Gutters project.

• The Shadow Mountain Drainage Improvement Project is funded by Stormwater Drainage Improvement (DrIP) funds in the amount of $233,822 for FY 2013. Account 210-9934-711.

• Maintain and deliver quality, reliable infrastructure.

• No, design phase services were completed by the WLB Group using the Council Approved On-call Engineering Services contract.

• Approve the Award as presented, or;
• Reject approval of the award and provide additional direction to staff.

The bid solicitation was published twice; June 10 and June 17, 2012. Six bids were received on June 25, 2012 at the City Purchasing office, below is a summary of bids received.

Bidder	Total
Eagle Mountain Construction	$212,566.00
Woodruff Construction	$221,225.00
L.P.s Excavating	$221,488.80
RK Sanders	$226,400.00
SDB, Inc.	$280,496.43
Standard Construction	$447,515.00

The Drainage Improvement Program (DrIP) is managed by the Stormwater Management Section to address local drainage problems.

The homes in the 1400 & 1500 blocks on the southside of Linda Vista have had garage and yard flooding problems during periods of heavy rain fall from stormwater running off Harris Way and the two Rainer Loops to the north and crossing Linda Vista and the curb on the south side of the street.  In addition, the house at 1455 Linda Vista, on the south side and downstream of the intersections, has experienced structural flooding when the capacity of the gutter is exceeded and water flows over the sidewalk and into the house.  This project will result in reducing the amount of water crossing Linda Vista and entering the south gutter.

• In order to promote positive drainage for this area, both intersections and parts of Linda Vista need to be re-graded.
• The re-grading along Linda Vista will be limited to the sections between the north curb and the centerline of the road.
• The new valley gutter will have capacity of 61.9 CFS and the entire roadway will have capacity of 79.7 CFS; which will contain the entire 100 year storm (43.3 CFS).

The community benefits fo this project include:

• Significant reduction in neighborhood flooding potential. The new drainage conveyance has been sized to accommodate anticipated stormwater runoff resulting from the 100 year rainfall event.

City of Flagstaff Stormwater Utility Staff have contacted owners and residents in proximity to the Shadow Mountain/Linda Vista Drainage Improvement Project and are acquiring the one Temporary Construction Easment needed.  Residents will be advised of the anticipated construction schedule, any planned service disruptions and provided the Project Manager's contact information.

During construction, information will be provided directly to area owners and residents through flyers, mailers and media releases as deemed necessary. The design consultant and contractor will be part of community involvement efforts.

1. Approve the award as recommended.
2. Reject approval of the award and provide additional direction to staff.  This option could delay the construction start until the 2013 construction season.