One westbound lane of Michigan Avenue between Prospect and Grove Street was still closed Monday in Ypsilanti after a Sunday water main break.

"The westbound lane is still barricaded, just about 200 feet south of Prospect, going west," said Ypsilanti Community Utilities Authority Director Jeff Castro.

Castro said there are still two lanes of traffic flowing each way because they're utilizing the center lane.

Castro said that portion of the road will likely not reopen Monday, and YCUA is meeting with MDOT before reopening. A reopen date has not been set yet.

"We want to make sure we restore it properly," Castro said. "Other than that, traffic is flowing just fine."

The water main break has been repaired and now YCUA is replacing soil that may have been washed away.

The Washtenaw County Sheriff's Office sent out an advisory alert Sunday alerting residents that Michigan Avenue between Grove and Prospect in Ypsilanti would be closed until further notice due to a severe water main break.

Castro said the water main break occurred at 8:30 a.m. and was isolated by 10 a.m.

"It was only an 8-inch water main break," Castro said. "We were able to isolate it quickly and it all drained out."

The break was discovered by an employee who was monitoring the water distribution system.

Castro said only two customers were affected by the water main break and no boil water advisory was needed. Castro said advisories are usually only put into affect if between 50 and 100 people are without water.

Castro said the water main break was a result of one of the valves malfunctioning, which was caused by an electrical spark.

"It opened more than we wanted to open and caused a water main break," he said. " We repaired the water main break and figured out the issue."

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Katrease Stafford covers Ypsilanti for AnnArbor.com.Reach her at katreasestafford@annarbor.com or 734-623-2548 and follow her on twitter.