AGENDA CAPTION:
Title
Consider approval of Resolution 2015-68R, approving the award of a Construction Contract to Westar Construction, Inc. for the Blanco River-River Road Slope Stabilization Project in the total amount of $485,825.00 contingent upon the Contractor’s timely submission of sufficient bonds and insurance in accordance with the City’s construction contract documents for the project; authorizing the City Manager or his designee to execute all appropriate contract documents on behalf of the City and declaring an effective date.
Body
Meeting date: June 16, 2015
Department: Capital Improvements - Laurie Moyer, Director (By Cheryl Pantermuehl, Purchasing Manager)
Funds Required: $485,825.00
Account Numbers: 51036355.70200; 12036306.70200
Funds Available: $485,825.00
Account Name: C516 Federal Const; C516 Drainage Const
CITY COUNCIL GOAL:
BACKGROUND:
On May 7, 2015 the City of San Marcos received a total of three (3) sealed bids for construction of the Blanco River-River Road Slope Stabilization Project (IFB 215-164). The City Staff along with the Design Engineer, Travis Wilson, P.E., of RPS, Inc., have reviewed the bids and recommend awarding the contract to the low bidder, Westar Construction, Inc., located in Georgetown, Texas in the total amount of $485,825.00.
This project was identified as an erosion problem along the embankment of the Blanco River adjacent to the intersection of River Road and Bugg Lane. As a result of the recent flood on October 31, 2013 the elevation of the Blanco River exceeded the soffit elevation of the twin 54” concrete pipes and the rubber valves at the end of the pipes closed as designed. Due to the hydrostatic pressure of the upstream head within the storm sewer system and the surface water within the subdivision, a leak occurred somewhere within the storm sewer system just before the outfall.
A visual inspection revealed an apparent material slope stabilization failure so the City hired a contractor to stabilize the embankment with quarry stones. After excavating the headwall, the contractor encountered voids along the sides and bottom of the twin 42” pipes, approximately 3’x4’x20’ in size. The location of the voids along the sides of the pipe is a strong indication of a leak in the storm sewer system. At this point, the City sought professional engineering services to provide a solution and final design construction documents.
The Memorial Weekend Flood has further destabilized this outfall. Based upon visual inspection there will need to be additional work change ordered into the project.
ATTACHMENTS:
Recommendation Letter
Project Map
Report to Council