FS0018X Feasibility study

• Contract/PO #: FS0018X
• Contractor Name: Sterling, City of
• Contract Type: Loan
• Water District: 0
• County: Logan
• Loan Projects - Doc Type: Feasibility Study

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

TABLE OF CONTENTS

I. INTRODUCTION............................................................. ........... .....................................1

II. PROJECT SPONSOR....................................................................................................... 1

III. PROJECT SERVICE AREA............................................................................................ 3

Study Area.................. ............................................................................................. 3

Previous Reports..................................................... .................................................6

Description of Flooding Problems..... ...................................................................... 7

IV. HyDROLOGy............................................. .............................................................. ...... 11

V. FIELD REPORTS................ ....................................................... ............. ....................... 13

VI. AL TERNA TIVE EVALUATION ....................................................................... ...........13

VII. COST ESTIMATE.................................................. ........................................................ 21

Funding Sources................................................. .... ............................................... 28

VIII. SELECTED ALTERNATIVE....................... ...... ........................................................... 28

IX. DETAILED DESCRIPTION OF SELECTED ALTERNATIVE ..............................31

Project Location..................................................................................................... 31

Existing Flooding Conditions................................................................................ 32

Hydrology......................................... ..................................................................... 33

Hydraulics......................................... ....... .............................................................. 34

Project Formulation............................................................................................... 34

Plan Description..................................................................................................... 36

X. IMPACTS AND PERMITS........................ ....... ........ .......................................... ..... ...... 39

XI. COST EFFECTIVENESS............................................................................................... 39

Useful Life of Project.................................................................................... ........ 39
Annual Maintenance Cost...................................................................................... 39
Frequency and Severity of Flood Events... ........ .................................................. ..41
Estimated Dollar Amount of Damages Prevented ................................ .................41
Justification to Support Estimate................................... ........................................45
Number of People Protected by Project.. ....... ............. ............... ............................45
Value of Property Protected by Project.............................................................. ...45

XII. BENEFIT / COST ANALySIS............. ................................................ ...................... ....46
XIII. SPONSOR FINANCIAL ANALySIS............... .................................................. ........ ...46

XIV. DESI GN AND CONSTRUCTION SCHEDULE......................... ......... ........ ............. ...46

XV. STERLIN G AMENDMENT 1 ELECTION ................................................................. 46