Work is under way in York City as Columbia Gas continues pipeline upgrades throughout the county.

During the first quarter of the year, the natural gas provider said it will spend $3.4 million on four projects in York County to revamp five miles of its infrastructure.

Two projects have already started downtown, and two others will begin later this year:

Those projects are these:

**The West Jackson Street Project will upgrade 7,000 feet of pipe by the end of June. Work has started and might impact traffic on West Cottage Place, and West Jackson and South Newberry streets.

**The Company Street Project will upgrade 2,300 feet of pipe by the end of April. Work has begun and might impact traffic on Company and North West streets, and North Belvidere Avenue.

**The Monroe Street Project will upgrade 12,170 feet of pipe in West York. Work is slated to begin in March or April and will last four months. Traffic might be affected on Monroe and North Diamond streets, and South Highland Avenue.

**The Ridge Avenue Project will upgrade 4,000 feet of pipe in Hanover. Work is slated to begin in March or April and will last two to three months. Traffic might be affected on Ridge Avenue from Old Ridge Road to Gay Street.

Columbia Gas will release more information about Monroe Street and Ridge Avenue projects closer to their start dates.

- Candy Woodall can also be reached at cwoodall@yorkdispatch.com.