Construction on Sanborn Boulevard in Mitchell for 2019 is about to hit high gear.

In between two projects, Sanborn Boulevard will be closed starting Monday, June 24 from the north side of West Birch Avenue and heading north to the south side of the intersection with West Fifth Avenue.

Lead contractor H&W Contracting, of Sioux Falls, said Tuesday that construction will begin for the second sequence of Sanborn's reconstruction for street and utility improvement project from First Avenue to Fifth Avenue on June 24. Simultaneously, rehabilitation of the existing Sanborn Boulevard bridge over the Dry Run Creek will also take place.

The Mitchell Department of Public Safety, in a message to citizens on Tuesday, said the bridge and Sanborn between First and Fifth avenues will be closed for approximately 45 days. The start of the Sequence 2 work will be about a month behind schedule, initially scheduled to begin in mid-May. In mid-April, the estimated start time was moved back to June 3.

In planning for the construction on Sanborn, Second, Third, and Fourth avenues from North Minnesota Street to Sanborn, and from Sanborn to North Rowley Street, are expected to change temporarily from one-way to two-way streets, to allow local residential traffic to get in and out of their homes easily. Typical Sanborn traffic is expected to be detoured to Minnesota Street, while truck traffic is being directed to use the State Highway 37 bypass.

Crews have already been working in the area of North Edmunds Street and West First Avenue, west of the intersection with Sanborn Boulevard, to repair storm sewers and water mains in that area that connect to Dry Run Creek. That work is referred to as Sequence 1, out of the four scheduled for this summer. Work started on that section on May 13. In a late May meeting regarding construction progress, H&W Contracting estimated Sequence 1 would be completed by June 29.

H&W's Project Manager John Rennich said the Sanborn bridge work would include repairs to the bridge deck, railing and fencing.

The entire slate of work this year was estimated to take 170 days, running until early November. The cost of the Phase II work is $4.69 million, and was bid together with next year's Phase III project, which will include further reconstruction north on Sanborn Boulevard.