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North Salt Creek Watershed Master Plan
North Salt Creek Watershed Master Plan
May 2018
Documents in PDF format.
Download Complete Report
(98.7 M Zip PDF)
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Cover and Table of Contents
(1.83 M)
Executive Summary
(1.07 M)
Section 1 – Introduction and Purpose
(1.85 M)
1.1 Introduction
1.2 Watershed Characteristics
1.3 Study Area Characteristics
1.4 Goals and Objectives
1.5 Public Participation Process
1.5.1 Open House Events
1.5.2 Website and Newsletter
Section 2 – Inventory and Methodology
(342 K)
2.1 Watershed Inventory
2.2 Study Methodology
2.2.1 Geomorphic Evaluation
2.2.2 Hydrology and Hydraulics
2.2.3 Land Use and Development
2.2.4 Minimum Stream Corridor
2.2.5 Special Areas Consideration
Section 3 – Geomorphic Evaluation
(1.41 M)
3.1 Introduction
3.2 Methodology
3.3 Results
3.4 Stream Recommendations
Section 4 – Hydrology and Hydraulics
(2.33 M)
4.1 Introduction
4.2 Methodology
4.2.1 Existing Data Summary
4.2.2 Approximate Zone A Flood Hazard Areas
4.2.2.1 Evaluation of Zone A Flood Hazard Area Boundary
4.2.2.2 Evaluation of Future Development Affecting the Zone A Flood Hazard Area Floodplain
4.2.3 Culvert Analysis
4.2.3.1 Flow Rates
4.2.3.2 Culvert Identification
4.2.3.3 HY-8 Analysis
4.2.3.4 Results
4.3 Hydrology and Hydraulics Recommendations
Section 5 – Land Use and Development
(2.27 M)
5.1 Introduction
5.2 Methodology
5.2.1 Existing Land Use Data
5.2.2 Future Land Use Data
5.2.3 Runoff Volume
5.3 Land Use and Development Recommendation
Section 6 – Minimum Stream Corridor
(2.52 M)
6.1 Introduction
6.2 Minimum Corridor Analysis
6.2.1 Existing Minimum Corridor Delineation Criteria
6.2.2 Minimum Corridor Analysis Methodology
6.2.3 Minimum Corridor Analysis Results
6.2.4 Other Minimum Corridor Criteria
6.3 Minimum Corridor Buffer Analysis
6.3.1 Existing Buffer Delineation Criteria
6.3.2 Minimum Corridor Buffer Analysis Methodology
6.3.3 Minimum Corridor Buffer Analysis
6.4 Minimum Corridor and Buffer Recommendations
Section 7 – Special Areas
(2.61 M)
7.1 Introduction
7.2 Methodology
7.3 Evaluation Results
7.4 Special Area Recommendations
Section 8 – Capital Improvement Projects
(6.86 M)
8.1 Introduction
8.2 Problem Identification
8.3 Evaluation Approach
8.3.1 Stream Erosion Evaluation
8.3.2 Special Areas Considerations
8.3.3 Capital Improvement Project Types
8.4 Capital Improvement Projects
8.4.1 Project NSC-01: Rock Armor and Scour Protection at Perched Alvo Rd Culvert Outfall on Tributary NS110R010
8.4.2 Project NSC-02: Bank Stabilization at Alvo Rd Crossing on Tributary NS010R015
8.4.3 Project NSC-03: Rock Armor and Scour Protection and Grade Control N 134th St Culvert Outfall on Tributary NS410R005
8.4.4 Project NSC-04: Bank Stabilization at N 84th St on Tributary NS030R005
8.4.5 Project NSC-05: Grade Control Knickpoint at Spillway on Tributary NS030R010
8.5 Prioritization
8.6 Other Improvement Recommendations
8.6.1 Project Other-01: Rock Armor and Scour Protection at Railroad Structure on Tributary NS010R010
8.6.2 Project Other-02: Monitor Bank Stabilization near N 134th St on Tributary NS410R005
8.6.3 Project Other-03: Grade Control Tributary NS025R005
8.6.4 Project Other-04: Monitor Bluff Rd Culvert Outfall on Tributary NS030R020
8.6.5 Project Other-05: Rock Armor Scour Pool at Spillway on Tributary NS040R005
8.6.6 Project Other-06: Project Other-06: Rock Armor Scour Pool at Spillway on Tributary NS045R005
8.6.7 Project Other-07: Bank Stabilization at Tributary NS070R005
8.6.8 Project Private-01: Monitor Bank Stabilization Near Utility Pole on Tributary NS010R025
8.6.9 Project Private-02: Grade Control Knickpoint on Tributary NS230R005
8.6.10 Project Private-03: Grade Control Knickpoint at Bluff Rd Culvert on Tributary NS230R010
8.6.11 Project Private-04: Grade Control Knickzone on Tributary NS090R015
Section 9 – Implementation
(156 K)
9.1 Introduction
9.2 Capital Improvement Project Implementation
9.3 Education Program
9.4 Project Funding
9.5 Coordination Efforts
9.6 Additional Studies
Section 10 – Glossary of Terms and References
(296 K)
10.1 Glossary of Terms
10.2 References
Appendices
Appendix A - Digital Deliverables
(13 K)
Appendix B - Public Participation Materials (Summary Documents, Attendance Lists, Minutes, Watershed News)
(95.1 M)
Appendix C - Fundamentals of Fluvial Geomorphology
(1.13 M)
Appendix D - Channel Condition Scoring Matrix and Channel Condition Data
(1.64 M)
Appendix E - Dominant Process Indicators and Reach Summary Data Sheets
(571 K)
Appendix F - Hydrology and Hydraulics Data
(590 K)
Appendix G - Land Use and Zoning Data
(534 K)
Appendix H - Stream Corridor Data
(4.23 M)
Appendix I - Capital Improvement Project Prioritization Ranking Worksheets
(507 K)
Appendix J - Capital Improvement Project Cost Worksheets
(483 K)
Figures
ES-1 Status of Watershed Master Plans
ES-2 Study Area Map
ES-3 CIP Locations
1-1 Status of Basin Plans Map
1-2 Watershed Map
1-3 Study Area Map
1-4 Watershed Newsletter
1-5 Project Website
2-1 Study Reaches
3-1 Channel Evolution Stages
3-2 Fieldwork Limits
3-3 Study Reaches
3-4 Bank Cutting and Mass Wasting
3-5 Channel Condition Scores
3-6 Stream Channel Dominant Process
4-1 Existing Floodplain and Floodway
4-2 HEC-RAS Model Extents
4-3 Zone A Flood Hazard Areas
4-4 70th Street Tributary Outside the Zone A Boundary
4-5 112th Street Tributary Outside the Zone A Boundary
4-6 Zone A Flood Hazard Areas Cross Sections Locations Map 70th Street
4-7 Zone A Flood Hazard Areas Cross Sections Locations Map 112th Street
4-8 Watershed Culvert Analysis
5-1 Existing Land Use – 2017
5-2 Future Land Use – 2040
5-3 Hydrologic Soil Group
5-4 Existing Land Use Hydrologic Soil Overlay
5-5 Future Land Use Hydrologic Soil Overlay
6-1 GIS Stream Analysis
6-2 Test Site Locations
6-3 Test Site 1 with NHD Streams
6-4 Test Site 2 with NHD Streams
6-5 Test Site 3A and 3B with NHD Streams
6-6 Test Site 4 with NHD Streams
6-7 Test Site 5A and 5B with NHD Streams
6-8 City of Lincoln Minimum Corridor Illustration
6-9 Oak Creek Stream Test Site Locations
6-10 North Salt Creek Stream Test Site Locations
6-11 Oak Creek Contributing Drainage Area Locations
6-12 North Salt Creek Contributing Drainage Area Locations
6-13 Oak Creek Test Site 5 Buffer Delineation
7-1 Special Areas Map 1
7-2 Special Areas Map 2
7-3 Special Areas Map 3
8-1 Rock Grade Control Structure Detail
8-2 Bank Stabilization Structure Detail
8-3 Rock Armor and Scour Protection Detail
8-4 Watershed CIP Locations
8-5 Perched Culvert Outfall
8-6 Conceptual Layout of NSC-01
8-7 Bank Failure at Culvert Wingwall
8-8 Conceptual Layout of NSC-02
8-9 Perched Culvert Outfall
8-10 Conceptual Layout of NSC-03
8-11 Perched Culvert Outfall
8-12 Conceptual Layout of NSC-04
8-13 Kickpoint at Spillway
8-14 Conceptual Layout of NSC-05
8-15 Other & Private Projects
8-16 Perched Outfall
8-17 Conceptual Layout of Other-01
8-18 Bank Erosion
8-19 Conceptual Layout of Other-02
8-20 Stream Incision
8-21 Conceptual Layout of Other-03
8-22 Degrading Grade Control Structure
8-23 Conceptual Layout of Other-04
8-24 Scour at Concrete Spillway
8-25 Conceptual Layout of Other-05
8-26 Scour Pool
8-27 Conceptual Layout of Other-06
8-28 Bank Erosion
8-29 Conceptual Layout of Other-07
8-30 Steep Bank Heights Near Power Pole
8-31 Conceptual Layout of Private-01
8-32 Stream Incision
8-33 Conceptual Layout of Private-02
8-34 Knickpoint
8-35 Conceptual Layout of Private-03
8-36 Stream Incision
8-37 Conceptual Layout of Private-04
Tables
ES-1 Project Priority, Rank and Cost
1.1 Watershed Characteristics
1.2 Study Area Characteristics
3.1 Average Field Score Per Channel Condition Rating Category
3.2 Number of GOOD, FAIR and POOR Field Scores
4.1 Main Stem Peak Flow Rates and Depths
4.2 Unnamed Tributary west of N 112th Street Peak Flow Rates and Depths
4.3 Evaluation of Zone A Flood Hazard Area Boundary Elevations
5.1 Existing Land Use Categories
5.2 Existing Land Use Areas
5.3 Existing and Future Land Use
5.4 Land Use Change – Existing to Future
5.5 Lookup table used to define the curve number for each land use/soil group combination
6.1 GIS Stream Analysis
6.2 Contributing Drainage Area at Location of 1 Foot Depth and Defined Bed and Bank
6.3 Test Site Buffer Widths at Multiple Contributing Drainage Areas
6.4 Recommended Buffer Width
8.1 Project Priority, Rank and Cost
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