11-12 - 645 Johnson Woods Drive Channel Bank Stablization - Gary Nash

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Item Nos. 11 & 12 Memorandum TO: Mayor & City Council FROM: Grayson Path, City Manager SUBJECT: 645 Johnson Woods Drive Channel Bank Stabilization (Gary Nash) Contractor Contract Approval DATE: February 8 2021 BACKGROUND: On July 27, 2020, the City Council approved an agreement with Gary and Rebecca Nash to partner together in funding the installation of new gabion-style retaining walls in the drainage way behind their property. The City had performed a sanitary sewer and erosion protection project in this area, but at the time it was agreed that the Nash's sackrete wall would remain in place. The sackrete wall subsequently failed. The Nash's and City came to an agreement to partner together to fund the replacement of this wall. The estimated cost of the project at the time was $51,175.00. Bids were received on October 1, 2020 and the lowest bid came back higher than expected, bringing the total project cost estimate to $68,260.00. The City Council then met on November 9, 2020 and agreed to Amendment #1 to increase the City's cap total contribution from $25,000.00 to $33,000.00 which helped share the increase in cost for the project. A contract with Bernal Commercial Construction, Inc. was approved by the City Council on December 14, 2020. STATUS OF ISSUE: A pre -construction meeting was held on site between Hayter Engineering, City Staff and Bernal Commercial Construction, Inc. While on site performing field measurements, the contractor discovered that an error occurred during bidding of this project resulting in an incorrect bid quantity. The plans clearly show the new wall replacing the failed sackrete wall and to subsequently connect with the existing stable sackrete wall to the south. But when quantities were verified out in the field by the contractor, we learned that the bid quantities were 8 linear feet of gabion baskets short. In addition, the contractor has stated that we have an additional 1 vertical foot of gabion basket that is unnecessary. The bid itself is not at risk as these are quantity errors, the contractor simply needs to order a few more gabion baskets. However, the net change in the contract cost with Bernal Commercial Construction is $3,333.33.