A $4.62 million project is underway to repair drainage canal walls and replace two pedestrian bridges at Ala Moana Regional Park.

About 900 feet of the drainage canal wall between the Ewa-side Japanese pond and tennis courts will be repaired or replaced with sections of precast reinforced concrete wall or reconstructed with concrete rubble masonry, according to a news release from the city Department of Parks and Recreation. Included in the project is a portion of the wall that collapsed in 2016.

The pedestrian bridges near Queen Street and Piikoi Street will be replaced with wider versions that align with Ala Moana Boulevard, the release said.

To accommodate delivery of materials, intermittent partial road closures will be required. Additionally, pedestrian access at the construction site and on the two bridges will be restricted.

Some of the trees in the project area will be protected, three will be relocated and one will be removed, the release said. Twenty-two new palm trees, primarily near the bridge entries, will be planted.

Kaikor Corp. is the contractor for the project, which started last week and is expected to be completed by the end of next year.

“This pedestrian bridge will provide central and much needed pedestrian access to Ala Moana Regional Park, the most heavily used park in the state, and sometimes called the ‘People’s Park,’” said Mayor Kirk Caldwell in a statement. “Also to be repaired are the collapsed coral block canal wall built at the inception of the park in the 1930’s that collapsed into the canal a couple years ago. These continued improvements are all part of an ongoing effort to take care of an irreplaceable natural resource for our residents that has been neglected for decades and allowed to degrade.”

The new bridge near Queen Street will be about 20 feet wide — twice as wide as the existing bridges — while the bridge near Piikoi Street will be closer to 30 feet wide. Both will have decorative railings and abutments.