An official website of the United States government

Here's how you know

Official websites use .mil

A .mil website belongs to an official U.S. Department of Defense organization in the United States.

Secure .mil websites use HTTPS

A lock () or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

US Army Corps of Engineers

Portland District Website

/ /

Media Navigation Menu

Media

Feature Stories

Images

Oblique view of a rocky shoreline at Fern Ridge Reservoir where shallow water near a boat ramp is coated with green cyanobacteria, creating a thick mat along the edge of the clear, still reservoir.

Cyanobacteria

Dense cyanobacteria covering the shallow water beside the rocky shoreline at a boat ramp on Fern Ridge Reservoir, forming a bright green band that follows the edge of the receding water.

Download Image: Full Size (1.92 MB)

Tags: environment, Fern Ridge Dam and Reservoir, Cyanobacteria

Photo by: Portland District | VIRIN: 131013-A-A1408-8003.JPG

Photo Gallery