ANTIOCH -- Three major thoroughfares in the heart of this city are now all in the middle of the cone zone.
Stretches of Lone Tree Way, Davison Drive and Deer Valley Road are in various stages of roughly $3.4 million in construction projects, forcing some single-lane closures through the area.
"These are some of our busiest arterials, so they need to be in good shape to take traffic around the city," Public Works Director Ron Bernal said.
Work is underway to add a second left-turn lane onto Lone Tree from southbound Deer Valley and extend a left-turn lane from Lone Tree into Prewett Family Community Park.
That project is anticipated to be completed by mid-November, city engineers said.
Meanwhile, contractors earlier this month started grinding down pavement and adding new asphalt on Deer Valley from Lone Tree to Mammoth Drive, Davison between Lone Tree and Deer Valley, and Sunset Drive between Davison and Lone Tree.
"Sunset, especially, was in really bad shape and starting to get potholes," Bernal said.
Davison and Deer Valley were starting to show the wear and tear from daily use by thousands of vehicles.
"It's important that we're tackling their condition now, before they get so bad that we would have to completely reconstruct them," Bernal said.
The project, a near $1.9 million contract with Stockton-based Knife River Construction, also includes replacing damaged or uplifted curbs, gutters and sidewalks, city officials said.
The Lone Tree project is being paid for by an assessment district for Lone Tree and county transportation funds through the Measure J half-cent sales tax.
About $1.48 million of the Deer Valley/Davison roadwork comes from money Antioch receives from the state through 2008's voter-approved Proposition 1B and $575,000 through a gas tax fund.
Earlier this year, the city completed a near $470,000 project to add rubberized seal to several roads, including Garrow Drive, Worrell Road, East Tregallas Road and D Street.
Adding the seal and covering it with gravel improves road quality in areas where deterioration is not yet at the point where the road needs to be replaced, Bernal said.
Contact Paul Burgarino at 925-779-7164. Follow him at Twitter.com/paulburgarino.