The Fridley City Council unanimously accepted a bid and awarded a contract for the Stonybrook outfall stabilization project.
In 2018, the City of Fridley completed the Stonybrook trunk storm sewer improvement project down towards Craigbrook Way.
The project included 1,300 feet of a 60 inch storm interceptor across East River Road, down Craigbrook Way and across Alden Way to the Mississippi River.
“This project was to alleviate flooding,” said Fridley Public Works Director James Kosluchar.
On Sept. 20, 2018, Fridley got 4 inches of rain in six hours and discovered issues with the older rubber gabion and the performance of the outfall itself.
Within days of that rainfall, the city did an emergency repair to mitigate erosion along that area.
Now, the city must come up with a permanent solution.
City staff came up with three different solutions and decided that modifying the existing outlets to drain into two manhole structures was the most feasible. The city would then fill the area to cover the manholes and tie it into the embankment.
“Staff has met with property owners on both sides of the channel and discussed the different alternatives proposed,” said Kosluchar. “We did hear that there was a desire to keep the channel open rather than pipe the entire channel.”
To allow for that, the project elements would include the installation of two storm manholes and outlet pipes, 950 cubic yards of fill, salvaging and installing riprap and an energy dissipator, restoration and erosion control. Additionally, the city will install a sheet pile along the south bank of the channel for structural support.
In December, the city received quotes after discussion with contractors about the different alternatives.
“We were expecting that we would be able to quote the project but they came in higher than the $175,000 bid threshold, so we went immediately to bid,” said Kosluchar.
Seven bids were opened and the lowest bid came from Lametti & Sons, Inc. of Hugo, in the amount of $329,400, which is still $200,000 over budget. The highest bid came in at $477,000.
The city has allocated the balance of $200,000 from its stormwater fund towards this project in the Capital Investment Plan.
“Excess funds due to the higher than expected cost of the project would be reallocated from the 2019 CIP TMDL Water Quality improvement project slated for this year,” said Kolsuchar. “We would allocate $150,000 from that project to this project, which $200,000 is budgeted for.”
Kosluchar said the city will continue to work closely with adjacent property owners.
“We should be substantially complete, now that we are getting some cold weather, in April of this year,” said Kosluchar. “We will be working with the contractor as quickly as possible to get going. It is the best time of year to do this type of work.”