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Wastewater Studies: Middle Creek Basin

West 'O' Street Trunk Sewer Extension


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Final Design Memorandum

Lincoln Wastewater System
West "O" Street Trunk Sewer Extension
Lincoln, Nebraska

October, 2004

Cover (54 K)
Table of Contents (37 K)
EXECUTIVE SUMMARY (51 K)
I. INTRODUCTION (51 K)
A. Project Background and Description
B. Project Team Organization
C. Alignment Selection
II. GENERAL (43 K)
A. Site Description
B. Geotechnical Investigations
C. Topographic Survey, Easements, and Material Laydown Areas
D. Documents
E. Applicable Standards and Guidelines
F. Project Approval Requirements
III. SEWER DESIGN (845 K)
A. Design Flows
B. Sewer Modeling
C. Pipe Design
D. Manholes
E. Connections to Existing and Future Sewer Facilities
F. Special Construction
G. Restoration
H. Utility/Railroad/NDOR Coordination
IV. PROJECT (36 K)
A. Basis of Project Costs
B. Construction and Engineering Costs
C. Easement Acquisition Costs
D. Present Value Opinion of Probable Project Cost
TABLES
1. Existing 36-Inch Trunk Sewer Flow Conditions based on Submergence
2. Assuming Existing Basin 70% and 2.5% Growth Development
3. Assuming Existing Basin 70% and 6.5% Growth Development
4. Summary of Existing Conveyance System Capacities
5. Opinion of Probable Project Cost
FIGURES
1. Drainage Basins
2. Projected Flow Curve
3. Profiles
4. SW 40th Street Viaduct
APPENDICES
A Preliminary Plan and Profile Drawings (6.31 M)
B Opinion of Probable Project Cost (51 K)
C Modeling Graphics (79 K)
D Alignment Study Figures and Cost Estimate (5.06 M)
E Wastewater Availability Figure (29 K)
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Wastewater Studies