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Deadmans Run Watershed Master Plan
Deadmans Run Watershed Master Plan
December 2007
Documents in PDF format.
Download Complete Report
(9.49 M)
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Cover and Table of Contents
(436 K)
Executive Summary
(831 K)
Section 1 - Introduction and Purpose
(554 K)
1.1 Introduction
1.2 Goals and Objectives
1.3 Public Participation Process
1.3.1 Open House Events
1.3.2 Citizen Advisory Committee
1.3.3 Information Sessions
1.3.4 Newsletter and Website
Section 2 - Data Collection and Development
(164 K)
2.1 Watershed Inventory
2.2 Drainage Structure Field Survey
2.3 Base Mapping
2.4 Water Quality Evaluation
2.5 Geomorphic Investigation
Section 3 - Hydrologic Model Development
(924 K)
3.1 Introduction
3.2 Hydrology Methodology
3.2.1 Subarea Delineation
3.2.2 Rainfall
3.2.3 Runoff Volume
3.2.4 Runoff Hydrographs (Lag Time)
3.2.5 Routing (Muskingum-Cunge)
3.2.6 Storage
3.2.7 Deadmans Run West Trib
3.2.8 Flow Diversions
3.3 Model Calibration and Ver
3.4 Model Results
Section 4 - Hydraulic Model Development
(56 K)
4.1 Introduction
4.2 HEC-RAS Model Development
4.2.1 Stream Network, Cross Sections, and Reach Lengths
4.2.2 Manning’s n-Values
4.2.3 Roadway Crossings and Dams
4.2.4 Expansion and Contraction Coefficients
4.2.5 Boundary Conditions
4.2.6 Ineffective Flow Areas
4.2.7 Channel Bank Stations
4.3 Modeling Deadmans Run West Tributary
4.4 Steady Flow Water Surface Profiles
4.5 Floodway Determination
4.6 Model Calibration and Verification
4.7 Quality Control
4.8 HEC-RAS Product
Section 5 - Floodplain Management Tools
(1.01 M)
5.1 Floodprone Areas
5.1.1 Flood Insurance Certificates
5.1.2 Floodplain Delineation Process
5.1.3 Study Floodplain and Floodway Maps
Section 6 - Water Quality
(316 K)
6.1 Introduction
6.2 Regulatory Compliance
6.2.1 Stormwater Regulations
6.2.2 Surface Water Regulations
6.3 Evaluation Approach
6.4 Previous Water Quality Studies
6.4.1 Stormwater Quality Evaluation of Livestock Runoff
6.4.2 Dry Weather Stormwater Monitoring
6.5 Wet Weather Water Quality Assessment
6.5.1 Water Quality Sampling Program
6.5.2 Water Quality Sampling Results
6.6 Water Quality Recommendations
6.6.1 Nonstructural BMPs
6.6.2 Structural BMPs
6.6.3 Private Development Demonstration Projects
6.6.4 Additional Studies
Section 7 - Fluvial Geomorphic Evaluation
(919 K)
7.1 Introduction
7.2 Geomorphic Field Reconnaissance
7.3 Evaluation Results
7.3.1 Historical Background
7.3.2 Stream Stage Classification
7.3.3 Summary Discussion
7.4 Stream Improvements
Section 8 - Capital Improvement Projects
(35 M)
8.1 Introduction
8.2 Problem Identification
8.3 Evaluation Approach
8.3.1 Flooding Evaluation
8.3.2 Stream Erosion/Water Quality Evaluation
8.4 Recommended Improvement Projects
8.4.1 Stormwater Conveyance Projects
8.4.2 Stormwater Detention Projects
8.4.3 Local Flood Control
8.4.4 Water Quality Projects
8.5 Watershed Solution
8.6 Prioritization
8.7 Summary
8.8 Other Projects Evaluated
8.8.1 Other Stormwater Conveyance Projects
8.8.2 Other Stormwater Detention Projects
8.8.3 Other Water Quality Projects
Section 9 - Benefit-Cost Analysis
(54 K)
9.1 Introduction
9.2 Benefit-Cost Analysis Approach
9.3 Benefit-Cost Ratio Calculation Process
9.4 Conclusions
Section 10 - Implementation
(43 K)
10.1 Capital Improvement Project Implementation
10.1.1 Watershed Solution
10.1.2 Local Flood Control
10.1.3 Water Quality Pro
10.2 Maintenance Agreements
10.3 Coordination Efforts
10.4 Project Funding
10.5 Education Program
10.6 Additional Studies
Section 11 - Glossary of Terms and References
(52 K)
11.1 Glossary of Terms
11.2 References
Appendices
Appendix A - Electronic Files
Appendix B - Public Participation Materials
(688 K)
Appendix C - Drainage Structure Design Data
(44 K)
Appendix D - Water Quality
(82 K)
Appendix E - Stream Reach Descriptions
(414 K)
Appendix F - Opinion of Probable Construction Costs
(48 K)
Appendix G - Prioritization
(110 K)
Tables
2-1 Drainage Structure Survey Data
3-1 Rainfall Duration Depths
3-2 Existing Land Use Percentages
3-3 Curve Numbers for Deadmans Run Watershed
3-4 Lancaster County Hydrologic Soil Groups
3-5 Sheet Flow and Shallow Concentrated Flow Values
3-6 100-Year Flow Comparisons
3-7 Drainage Area Comparisons
3-8 HEC-HMS Modeling Results
4-1 HEC-RAS Parameters Development
4-2 Land Surface Characteristics and Associated Manning’s n-Values
4-3 Channel Descriptions and Associated Manning’s n-Values
4-4 Expansion and Contraction Coefficients
6-1 Structural BMP CIP Projects
8-1 Stream Crossing Overtopping Flood Depths
8-2 Bridge Ratings and Status
8-3 Deadmans Run Priority Ranking Results
8-4 Recommended Improvement Project Costs
9-1 Categories of Avoided Damages
9-2 Benefit-Cost Ratio Procedures
9-3 Total Physical Damages Before Projects
9-4 Total Physical Damages After Projects
Figures
1-1 Deadmans Run Watershed Area Map
1-2 City of Lincoln Comprehensive Watershed Management Plan
2-1 Water Quality and Geomorphic Assessment Locations
3-1 Deadmans Run Existing Conditions Land Use
3-2 Deadmans Run Hydrologic Soil Groups
3-3 Stormwater Detention Facilities
3-4 Deadmans Run West Tributary
5-1 Floodplain Map Tiles
5-2 Tile 1 Floodplain Map
5-3 Tile 2 Floodplain Map
5-4 Depth of 100-Year Storm
6-1 Water Quality Sampling Locations
6-2 Continuous Deflection Plan View
7-1 Geomorphic Evaluation Stream Segments
7-2 Segments 1 and 2 - Historical Photographs
7-3 Segment 3 - Historical Photographs
7-4 Channel Evolution Model (Simon 1989)
7-5 Segment 3 – Existing Outfalls
7-6 Deadmans Run Knickpoints
8-1 Master Plan Existing Conditions 100-Year Floodplain
8-2 Conceptual Level Improvement Projects
8-3 Project 1, Location 1 Channel Improvements
8-4 Project 1, Location 1 Typical Channel Cross Section
8-5 Project 1, Location 2 Channel Improvements
8-6 Project 1, Location 3 Channel Improvements
8-7 Project 1, Location 3 Typical Channel Cross Section
8-8 Project 2, Improvement Locations
8-9 Project 2, Location 1 Typical Channel Cross Section
8-10 Project 2, Location 2 Typical Channel Cross Section
8-11 Project 3 Channel Improvements
8-12 Project 3 Typical Channel Cross Section
8-13 Project 4 Channel Improvements
8-14 Project 4 Typical Channel Cross Section
8-15 Project 5 Design Components
8-16 Project 6 Design Components
8-17 Project 7 Construction Limits
8-18 Recommended Water Quality Project Locations
8-19 Project 8 Pond Retrofits
8-20 Bethany Park Recommended Water Quality Feature
8-21 Russwood Basin Retrofits
8-22 Project 11 Water Quality Features
8-23 Project 12 Location of Hydrodynamic Separator
8-24 Project 13 Location of Stream Stabilization Measures
8-25 100-Year Floodplain Comparison
8-26 Other Projects Evaluated
9-1 FEMA Building Depth-Damage Curves
9-2 FEMA Contents Depth-Damage Curves
9-3 Street Flooding Depth-Damage Curves
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