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11-12-19-R
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ARDEN HILLS CITY COUNCIL WORK SESSION — October 21, 2019 3 <br />B. Old Snelling Avenue and County Road E Improvements Update <br />Interim Public Works Director/City Engineer Blomstrom stated that he wanted to give a status <br />update on the study that is underway for Old Snelling Avenue and County Road E. The project is <br />on the City's Capital Improvement Plan with an estimated cost of $2,850,000 for the roadway <br />improvements and the City's share of the proposed roundabout. The roundabout is also on the <br />Ramsey County Transportation Improvement Plan, estimated at $1.5 million in County funds and <br />$375,000 in City funds. <br />Interim Public Works Director/City Engineer Blomstrom said that at the September PTRC <br />meeting the committee identified a trail on Old Snelling Avenue from Highway 51 to Highway 96 <br />as a top priority, focusing on County Road E to Highway 51. <br />Interim Public Works Director/City Engineer Blomstrom said the water mains that are in the <br />corridor are cast iron, much of it over 50 years old and brittle. It is located either in the roadway or <br />directly adjacent to the roadway. He reviewed a map identifying segments of water main <br />proposed to be replaced along with the project. All the water mains could be replaced if the <br />Council wished to expand the project. Much of the sanitary sewer is outside the roadway corridor. <br />There is a segment that needs to be replaced with the project. Much of the storm sewer would <br />need to be reconfigured if the roundabout goes forward. There is considerable deterioration on the <br />northern section and Ramsey County has identified the need for rehab or replacement. <br />Interim Public Works Director/City Engineer Blomstrom noted there are wetlands along the <br />corridor. SEH has prepared a summary report and submitted it to the Rice Creek Watershed. The <br />report is still under review. <br />Interim Public Works Director/City Engineer Blomstrom explained two schematic options <br />were developed for the intersection. The first is centered at the existing intersection, the second <br />option is shifted to the east. Final design may bring the roundabout somewhere in the middle of <br />the two options. <br />Interim Public Works Director/City Engineer Blomstrom discussed the roadway design <br />options. The first option is to replace the road as it is today, not add a trail, and maintain the eight <br />foot shoulders. Other alternatives include narrowing the road to two 12 -foot lanes with two six- <br />foot shoulders and having a separate trail. Another option is to add curb and gutter with a trail <br />separated from the curb, or expand the trail to 10 -feet wide directly adjacent to the west curb line. <br />Interim Public Works Director/City Engineer Blomstrom reported there are complicating <br />factors. Fifteen soil borings were taken along the corridor, drilled to a depth of about 15 feet. Lab <br />results have not been received. Hydrocarbon odors were detected by human smell in ten borings <br />at variable depths. Staff recommends testing for hydrocarbons and potential contaminants. The <br />roadway borings also had irregular base and pavement sections. <br />Discussion ensued regarding preliminary cost estimates and potential special assessments. <br />Interim Public Works Director/City Engineer Blomstrom said next steps include receiving the <br />soil boring lab tests, completing the pavement section design, conducting an environmental <br />
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