 Construction will close lanes and ramps through the Duluth tunnels for more than a month starting tomorrow. The Minnesota Department of Transportation says they will start a concrete resurfacing project on Interstate 35. The southbound off-ramp and the northbound on-ramp to and from the Lake Avenue Bridge will be closed for about a month. There will be lane closures from 5th Avenue West to 13th Avenue East. More lane and ramp closures will continue in August.