Bathymetric and sediment facies maps for China Bend and Marcus Flats, Franklin D. Roosevelt Lake, Washington, 2008 and 2009

Abstract

Black-colored particles Study area Underwater video survey points http://www.usgs.gov/ 1-888-ASK-USGS Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Not for navigational use China Bend Marcus Flats Basemap images (dated 2004) for figures 2A-4A and 2B-4B from U.S.

Toxicity of Metals Associated with Sediments from the Columbia River to Early Life Stages of White Sturgeon

“…The experimental methods, including selection of sites from which sediments were collected, efforts, and study design have been described previously [25]. Early life stages of white sturgeon were exposed to UCR sediments in the laboratory from 1 day post hatch (dph) through 60 days to sediments collected from areas of the UCR known to be white sturgeon spawning-and/or nursing-grounds [28,29] and contained a range of concentrations of chemicals of potential concern (COPC) in sediments assumed to contain granulated slag [12,13]. Specifically, the primary COPCs were postulated to include Cd, Cu, Pb, and Zn [12,13].…”

Assessment of Columbia River Sediment Toxicity to White Sturgeon: Concentrations of Metals in Sediment, Pore water and Overlying Water

“…Locations in the UCR from which sediments were collected were in areas known to encompass confirmed white sturgeon spawningand/or nursing-grounds [25,26], as well as to represent a range of exposure conditions [11,12]. Sampling focused on the reach of the UCR between Kettle Falls (river mile [RM] 703) to the U.S.-Canada border (RM 745), and was intended to represent a gradient of COPC concentrations in sediments associated with granulated slag [11,12].…”