FLOOD09102

• County: Logan
• Community: Sterling
• Basin: South Patte
• Title: Sterling Flood Control Interceptor Channel Project
• Date: 4/1/2002
• Prepared For: Sterling
• Prepared By: URS
• Floodplain - Doc Type: Project

I
I I 'lIlE OF eomm

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
.

Section 1.

Introduction ............... ................... ...........'..................... ............. ....... ........ ..,.. .....,.......... 1-1

1.1 Background .............................................................................................. 1-1
1.2 History...................................................................................................... 1-1
1.3 Purpose and Need .................................................................................... 1-2
Alternatives Cons idered ......... ....,.. .................. ..... .................................................. ....... 2-1

Section 2.

2.1 Alternatives Analyzed and Dismissed ..................................................... 2-1

2.1.1 Flood Control Levees................................................................ 2-1
2.1.2 Upstream Flood Control Reservoirs ......................................... 2-1
2.1.3 Construction of Drainage Floodway Upstream of Atwood ...... 2-1
2.1.4 Improve Routing of Pawnee Creek Flood Flows...................... 2-2

2.2 Alternatives Carried Forward .................................................................. 2-2

2.2.1 Alternative 1 - No Action .........................................................2-2
2.2.2 Alternative 2 - Sterling Flood Control Interceptor
Channel (Proposed Action)....................................................... 2-2

Section 3.

Affected Environments and Environmental Consequences ,...............,..,...............,.. 3-1

3.1 Geology and Soils.................................................................................... 3-1

3.1.1 Alternative 1 - No Action ......................................................... 3-1
3.1.2 Alternative 2 - Sterling Flood Control Interceptor
Channel (Proposed Action)....................................................... 3-1
3.1.3 Alternative 3 - Improve Routing of Pawnee Creek Flood

Flows ...... ................................................................................... 3-2

3.2 Land Use and Planning............................................................................ 3-3

3.2.1 Floodplain Encroachment (E.O. 11988) ................................... 3-3

3.2.1.1
3.2.1.2

3.2.1.3

Alternative I - No Action....................................... 3-3
Alternative 2 - Sterling Flood Control
Interceptor Channel (Proposed Action) .................. 3-3
Alternative 3 - Improve Routing of Pawnee
Creek Flood Flows.................................................. 3-4

3.2.2 Prime Farmland............... ........................................... ............... 3-5

3.2.2.1
3.2.2.2

3.2.2.3

Alternative I - No Action ....................................... 3-5
Alternative 2 - Sterling Flood Control
Interceptor Channel (Proposed Action) .................. 3-5
Alternative 3 - Improve Routing of Pawnee
Creek Flood Flows.................................................. 3-5