BLACKSBURG -- Virginia Tech's Duck Pond is full again, and a group of engineers has nearly completed a bevy of changes to the aquatic sanctuary.

Last month, the university drained much of the water and made way for state police divers, who scoured the mucky bottom in search of evidence related to the April 16 shootings on campus. Investigators said they found nothing.

In the aftermath, crews began implementing ways to better manage water flow and repairing the pond, said Jennifer Harris, spokeswoman for Tech's transportation department.

A stormwater management project had been in the works since January, and the work was planned before state police requested to search the pond, Harris said. The repairs are expected to be complete next month.

In the past three weeks, the four engineers in charge of the project used interlocking concrete blocks to reinforce the banks of the pond and its tributaries, which should reduce erosion.

"We noticed that the pond needed repairs because of stormwater runoff in the past," Harris said.

Part of the plan is to help curb some of the sediment and gunk that flows from creeks into the pond and can filter back into town water supplies, Harris said.

Virginia Tech's Duck Pond was built in 1937 by damming Central Branch and Webb Branch, the two streams that come together to make Stroubles Creek.

Water from Webb Branch, which follows Blacksburg's North Main Street, feeds the upper pond, which is the larger portion. Some of that water then flows into the lower pond. The lower pond gets some drainage from Stroubles, near the Drillfield.

Engineers also put in two small overflow dams that will help measure the amount of water that flows through the pond, Harris said.

The dams -- one near the creek that runs underneath the Drillfield and a second near Webb Branch -- are expected to help engineers create a hydraulic model of the area that engineers will use to analyze stormwater that accumulates on campus.

It should help builders plan new projects on campus, said David Dent, site and infrastructure development manager at the university.

The repairs and updates also can be used in the classroom as students learn about velocity flow and upkeep, Harris said.