FLOOD03889

• County: Statewide
• Community: Harrison County, Iowa
• Stream Name: Missouri River Miles 651-64905
• Basin: Statewide
• Title: California Bend Habitat Restoration/Preservation Project Volume 1
• Date: 10/1/1994
• Prepared For: US Army Corps of Engineers
• Prepared By: Greenhorne & O'Mara, Inc.
• Floodplain - Doc Type: Project

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TABLE OF CONTENTS

1.

Page
INTRODUCTION ...................................... 1

a. Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

b. Authority. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1
c. Previous Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1
d. Coordination Team .................................. 2
e. Resource Problems and Opportunities ....................... 3
f. Project Goals and Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3
g. Scope of Study . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4
h. Report Format ..................................... 4

2.

SITE SELECTION PROCESS .............................. 7
a. General Eligibility Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7
b. Selection Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8

3.

AFFECTED ENVIRONMENT .............................. 8
a. Physiography and Topography . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8
b. Water Quality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9

c. Air Quality ....................................... 9
d. Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9
e. Prime Farmland ................................... 11
f. Aquatic Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11
g. Terrestrial/Wetland Resources . . . . . . . . . . . . . . . . . . . . . . . . . .. 12
h. Threatened and Endangered Species ....................... 15
i. Historic Properties and Archeological Resources . . . . . . . . . . . . . . .. 16
J. Socioeconomic Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 18
k. Recreation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 19
1. Aesthetics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 19

m. Land Use ....................................... 19

SITEOBJECTIVES..................................... 20

DESIGN AND CONSTRUCTION CONSIDERATIONS ............. 20
a. Engineering Analyses ................................ 20

b. Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 22
c. Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 23

ALTERNATIVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 23
a. Alternative A - Flow-Through Chute Channel and Backwater Area .... 23
b. Alternative B - Flow-Through Chute Channel and Backwater Area
with Alternate Water Supply. . . . . . . . . . . . . . . . . . . . . . . . . .. 24
c. Alternative C - Backwater/Wetland Complex . . . . . . . . . . . . . . . . .. 24