Oregon City Council on Monday approved contracts for sanitary sewer manhole rehabilitation projects that will improve drainage in the city.
Public Service Director Paul Roman said the projects will remove storm water inflow and infiltration.
The manhole rehabilitation projects includes the lining of 12 severely deteriorated manholes with a polymer coating, said Roman, and the chemical grouting of 54 sanitary sewer manholes with less severe deterioration, such as cracks, leaking joints, leaking pipe seals, leaking vent seals and holes.
The department inspected all 1,800 manholes in the city. The defects were discovered during wet weather GPS inspection of the manholes over the last three years.
At a committee of the whole meeting two weeks ago, Councilman Dennis Walendzak asked Roman if the repairs are concentrated in any specific areas of the city.
“The majority of them are in the Wheeling Street district, which is the older section of the city,” said Roman. “But they are spread throughout the city. There are a few others, too, that are all steel. And we’re trying to think of the best way to seal those. We’ll have some other projects coming forward throughout this next year.”
Upon Roman’s recommendation, council approved awarding the first project to Advanced Rehabilitation Technology for $32,065, and the second project to Culy Construction & Excavation for $33,400.
There was a total of five bids submitted for the first project, and six bids for the second project. Both companies that were awarded the contracts submitted the lowest bids, according to Roman.
Council also approved a contract to replace the Lallendorf Road Bridge over the Amolsch Ditch. Council awarded the contract to E.R. Zeiler Excavating, Inc., of Temperance, Michigan, for $249,469.95.
“This bridge is just about midway between York Street and Cedar Point Road on Lallendorf,” said Roman.
“The purpose of this project is really more for drainage than it is for the structural integrity of the existing bridge, which is just under a six foot wide span,” said Roman. “This new bridge will be a 12-foot span. It is designed in conjunction with everything that will occur downstream, which will be the Oregon Flood Relief and Erosion Control project. This is the first bridge as you start to head upstream for Amolsch. So it does provide a lot more capacity, and that really is the purpose of it.”
E.R. Zeiler has previously performed work in the city, said Roman.
“They were the lowest and best bid out of five bids,” he said. “This project is in our budget. It’s about $20,000 less in construction costs that what it was estimated.
Councilman Sandy Bihn praised Roman for his work on native plants and staging of ditches on Stadium Road. “I’m wondering if in this project, if you’re looking at the plantings, sediment traps, and anything else in terms of controlling nutrient run-off, and if you have any idea what the nutrient levels in the stream are? One of the things that’s becoming apparent is sometimes we do these projects, but we don’t measure the impacts before and after in terms of water quality. The big driver now, for so much of our water, is nutrients. I’m just wondering if you’re looking at that, and if this project would be able to be tested before and after in terms of what the levels are now and what they might be in the future?”
Roman said Oregon is one of just a few communities that have been testing storm water in all of its ditches in the last several years.
“We take quarterly storm water samples and we do look for sediment loads as well as nutrients. We have been collecting this data for some time,” he said.
“I’ve tried to get OPWC [Ohio Public Works Commission] money for this bridge at least twice. And it’s just not viewed as a regional project. It didn’t score well. But it’s something that’s very important for drainage. For the Amolsch Ditch watershed, it is really needed. And it is the starting point of improving other culverts as we work our way upstream,” said Roman.
Council also approved an agreement with Poggemeyer Design Group, Inc., to provide construction engineering for the Lallendorf Road Bridge replacement project over Amolsch Ditch for $6,338. “This is really to hire Poggemeyer, who did the bridge design, to keep them throughout construction for construction engineering. It’s only if we run into problems would we really call upon them to help,” said Roman.