FLOOD08146

• County: Statewide
• Community: Otoe CountyNebraska
• Stream Name: Missouri River Miles 551.7-555.8
• Basin: Statewide
• Title: Hamburg Bend Habitat Restoration / Preservation Project Volume 1
• Date: 8/1/1994
• Prepared For: US Army Corps of Engineers
• Prepared By: Greenhorne & O'Mara, Inc.
• Floodplain - Doc Type: Project

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c. Air Quality: Most air pollutants in the study area consist of suspended particulates
from agricultural activities, such as dust raised during plowing, The only other source of
pollutants in the area is the Nebraska City Power Plant which emits low concentrations of
particulate matter and sulfur dioxide, There have been no violations of the National Ambient
Air Quality Standards (NAAQS) in the vicinity of the project site. The entire State of Nebraska,
except for a small area in Omaha, is in attainment for all NAAQS (Nebraska Department of
Environmental Quality 1993).

d. Noise: The major sources of noise in the study area result from agricultural activities,
hunting activities, and occasional barges and tow boats on the Missouri River (Remus, pers.
comm. 1994).

e. Prime Fannland: The U. S, Department of Agriculture defines prime farmland as
"soils that are best suited to producing food, feed, forage, fiber, and oilseed crops" (USDA
1982). These lands have the soil quality, growing season, and moisture supply needed to
economically produce sustained high yields of crops when treated and managed according to
acceptable farming methods. Prime farmland soils in the project area include Haynie silt loam
(Ha) , Onawa silt loam (Oc), and Onawa silty clay (On). These soils comprise approximately
440 acres (approximately 35 percent) of the project site,

f. Aquatic Resources: Most of the aquatic resources associated with the Hamburg Bend
site inhabit the Missouri River, Approximately 107 acres of the project site may be comprised
of water during the wet period of the year in late spring and early summer. Many of these
water bodies are ponded in the vicinity of the old chute and may recede during dry 'veather to
form mudflats,

A diverse assemblage of fish exists within the Missouri River in the vicinity of the site,
Surveys were conducted for the Nebraska City Power Plant (OPPD 1982) to monitor
impingement on the intake structure and to determine the nature of the adult fish population in
the vicinity of the station both before and after operations. The adult fishery studies were
conducted from the fall of 1977 to the spring of 1982. The impingement studies were conducted
from May of 1979 through May of 1982.

The adult fishery studies indicated that carp, goldeye, river carpsucker and gizzard shad
represented the dominant catch based on mass. Silvery minnows, plains minnows, river shiners,
emerald shiners and red shiners were the most abundant species collected (OPPD 1982).

The results of the impingement study showed that species commonly impinged included
rainbow smelt (36.1 %), river carpsucker (20,8%), channel catfish (17.3%) and freshwater drum
(12,1 %). These species represented 86.3 % of impinged fish during the entire study period and
ranged from 63.4% to 89,7% of each annual impingement. Typically, these were young-of-the-
year fish (OPPD 1982), Appendix A provides a list of common and scientific names of all fish
collected in the Missouri River near the Nebraska City Power Plant.

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