Repairs on the Oroville Dam's damaged spillway are progressing slowly but surely, as time-lapse video from the Department of Water Resources shows.

The spillway crumbled during the extremely wet winter and forced the evacuation of 180,000 people.

The time-lapse video was taken between June 26 and Aug. 22, according to the San Jose Mercury News. Though the footage shows progress being made as crews lay down and compact concrete, it's clear there's a lot more work to be done.

Reconstruction of the main spillway is on track to be completed by Nov. 1, in time for California's rainiest months. Since the spillway's erosion in February, crews have been working to remove and rebuild 2,270 feet of the spillway. The upper part of the spillway will be patched for now, and then fully demolished and reconstructed in the summer of 2018.

OROVILLE DAM: A story of a catastrophe told through photos

To make the repairs, about 800,000 cubic yards of cement will be poured. That's twice the amount that was used to build the Bay Bridge's new skyway, the San Francisco Chronicle reported in June. Two concrete plants and a workforce of 500 are dedicated to helping the Department of Water Resources meet its November deadline.

The gaping hole in the dam's spillway was first spotted on Feb. 7. Heavy rains had filled Lake Oroville to capacity and, to avoid flooding, water was released down the dam's main spillway. As the water came down the spillway, the crater grew until a large stretch of the spillway completely eroded away.

DRONE'S EYE VIEW: Drone video shows repairs progressing at Oroville Dam

As heavy rains continued, water began to pour over the emergency spillway, a hillside that wasn't reinforced with concrete. The emergency spillway also began eroding, so officials ordered the evacuations of 180,000 residents who lived downriver.

Officials hope the emergency spillway won't ever be used again, but they're building a cutoff wall to prevent future erosion, just in case.

You can find more time-lapse videos of the repairs' progress on the Department of Water Resources YouTube page.

Read Alix Martichoux's latest stories and send her news tips at amartichoux@sfchronicle.com.