Maloney Ave Sewer Project - Request for Budget Adjustment
A portion of the wastewater collections system failed underneath Maloney Ave, near the intersection of 9th and Maloney. The original project scope consisted of installing approximately 40 linear feet of sewer line to repair an existing 15-inch vitrified clay sewer line. The line was replaced with 15-inch SDR 35. Work included connection to existing 15” vitrified clay pipe, bypass pumping, fittings, specials, trenching, backfilling, compaction, transfer of existing sewer services, and traffic control. Asphalt pavement patch with NMDOT striping was also required.
$42,285 from Fund 508 was approved for the initial 40-feet of repair. This repair was completed in mid-May 2021. However, upon trying to tie in the new line into the existing line and manhole in the area, the engineer, City staff and contractors noted that an additional 460-feet of sewer main was either beginning to collapse or had completely deteriorated in the area.
The City wastewater crew installed a 12-foot deep wastewater collections concrete manhole in the area, independently from the contractor, thereby saving approximately $25,000 in labor and materials, and provided a new tie in point for the new sewer line.
The engineer of record, DePauli Engineering and Associates, negotiated a time and materials rate for the two contractors that were originally selected for the project via a formal bid process. As the additional failing sewer line presented a public health hazard and could have caused violations of the Clean Water Act, from a compliance perspective had wastewater backed up in the collections system into the environment, Water and Sanitation Department Staff informed the Puchasing, Finance, Legal and City Manager's Offices to obtain concurrence and approval to move forward with replacing the additoinal 460-feet of sewer line via emergency procurement channels.
The time and materials basis for both contactors totalled $182,000 per week, with a time frame of three weeks, for a total of $546,000. Please note that this time and materials basis is being adjusted downward via weekly and daily negotiations between the engineer and the contractors.
The total cost is approximately 7-10% higher than parametric, historic project estimates for similar projects.
Staff requests a budget adjustment and expenditure of up to $546,000 from Fund 202, Environmental Surcharge Tax Fund.
Attachments 1 - 5 detail the decision making process, engineer's recommendations and weekly rates.
A map of the area and required repairs is being drafted and will be presented to the City Council during its regular meeting.
- Fiscal Impact:
- Budget adjustment and expenditure of up to $546,000 from Fund 202, Environmental Surcharge Tax Fund.
- Staff recommends approval of up to $546,000 from Fund 202, Environmental Surcharge Tax Fund.
- Speaker's Name
- Dennis Romero