| ITEM #: 6. DATE: 05/23/2022 AI #:860 |
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CITY COUNCIL ACTION REPORT
| SUBJECT: | AMENDMENT ONE OF THE AGREEMENT WITH BUCKEYE WATER CONSERVATION AND DRAINAGE DISTRICT (BWCDD) FOR REPAIR AND IMPROVEMENTS TO THE BULLARD WASH OUTFALL (PROJECT #60073), AND RELATED BUDGET TRANSFER |
| STAFF PRESENTER(S): | Barbara Chappell, Deputy Public Works Director |
SUMMARY
The proposed Amendment to the Agreement with Buckeye Water Conservation and Drainage District (BWCDD) will allow for repairs of areas adjacent to the canal for an amount not to exceed $449,344 and related budget transfer.
Recommendation
Approve the Amendment to the Agreement with the Buckeye Water Conservation and Drainage District for repairs and improvements to the Bullard Wash Outfall and the expenditure of funds not to exceed $449,344 and related budget transfer to meet the terms of the Agreement. (Barbara Chappell, Deputy Public Works Director)
FISCAL IMPACT
The project was approved in the FY2022 Capital Improvement Plan with a total project budget of $1,800,000. The original Agreement was for $1,360,756 and this request is for the remaining available budget in the Bullard Wash Outfall Repairs CIP Project (60073) and a budget transfer in the amount of $10,100 from CIP Reserves, for a total expenditure approval of $1,810,100.
BACKGROUND AND PREVIOUS ACTIONS
In April 1998, the city entered into an Intergovernmental Agreement (IGA) with the Maricopa County Flood Control District to share in the cost of construction of the Bullard Wash Outfall. The IGA further assigned the responsibility to inspect and maintain the completed project to the city.
The concrete structure that allows stormwater flows from Bullard Wash to cross over the BWCDD canal seems to have questionable design that restricts the water flow in the canal, and this Bullard Wash concrete structure has been undermined by erosion of the canal’s earthen banks possibly caused by the design of the concrete structure and/or caused by past flooding events.
On October 4, 2021, Council approved the Agreement with the Buckeye Water Conservation and Drainage District for repairs and improvements to the Bullard Wash Outfall and the expenditure of funds in the amount of $1,360,756.
The concrete structure that allows stormwater flows from Bullard Wash to cross over the BWCDD canal seems to have questionable design that restricts the water flow in the canal, and this Bullard Wash concrete structure has been undermined by erosion of the canal’s earthen banks possibly caused by the design of the concrete structure and/or caused by past flooding events.
On October 4, 2021, Council approved the Agreement with the Buckeye Water Conservation and Drainage District for repairs and improvements to the Bullard Wash Outfall and the expenditure of funds in the amount of $1,360,756.
STAFF ANALYSIS
During the construction of the project, water flowed into the structure which began to wash away the area we had just repaired. In order to prevent future undermining of the structure, a plan to remove the mortared rip rap and replace with a concrete slab has been proposed and can be accomplished with the remaining project funds. It is anticipated that all work associated with this project will be complete by June 30, 2023.