A temporary black sewer pipe surfaced Saturday in the Ala Wai Canal, but the pipe is not leaking or posing a health risk, the city’s Environmental Services Department said in a release.

The pipe was exposed after an air bubble floated a 100-foot section of it and its anchors near the Hawai’i Convention Center, the release said. The 5,000-foot long pipe was installed after the Beachwalk force main break in 2006. 

Only a small amount of sewage flows through the black temporary bypass pipe. The original rehabilitated main handles most of the sewage flow.

Work crews will resubmerge the pipe Monday.