Portland Debates Solutions for Algae Blooms in Ross Island Lagoon
The "Fixing a Hole" topic in Portland, OR, revolves around the issue of harmful algae blooms in the Ross Island lagoon of the Willamette River. These blooms, exacerbated by stagnant water and warmer temperatures, threaten the river's swimmability and Portlanders'…
Portland, OR, August 13, 2026 —
Portland, Oregon is grappling with the persistent problem of harmful algae blooms in the Ross Island lagoon, a section of the Willamette River.
These blooms, fueled by stagnant water conditions and rising temperatures, pose a significant threat to the river’s health and its recreational use by residents. The issue, referred to as “Fixing a Hole,” has brought two distinct solutions to the forefront of discussion.
One proposed approach involves engineering a new channel to enhance water circulation within the lagoon. This solution aims to mitigate the conditions that foster algae growth by improving water flow. However, the project is noted to be costly.
A second, more contentious proposal suggests filling the lagoon using material sourced from the Portland Harbor Superfund site. Proponents of this plan suggest it could potentially lower cleanup expenses associated with the Superfund site. However, concerns have been raised that this method might exacerbate algae bloom problems in the lagoon, at least in the short term.
The ongoing situation underscores the critical role a healthy Willamette River plays in the ecological balance and economic vitality of Portland. The decisions made regarding the Ross Island lagoon will impact the community’s ability to connect with and enjoy their riverfront.
Story summarized from the original created by Abe Asher on www.portlandmercury.com, see more information here.
