GEOTECHNICAL EVALUATION OF CALIFORNIA S CENTRAL VALLEY LEVEES
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1 GEOTECHNICAL EVALUATION OF CALIFORNIA S CENTRAL VALLEY LEVEES Steven Mahnke, PE, GE California Department of Water Resources Sujan Punyamurthula, PhD, PE URS Corporation Mark W. Connelly, PMP Kleinfelder Floodplain Management Association September 3,
2 AGENDA Levee Evaluation Program Overview Current applications of data and tools Going forward future uses 2
3 Local Agencies What s In It for You Get a jump start on your projects Understanding the guidelines, criteria and procedures for guidance documents, criteria, remedial alternatives, and preliminary costs Supporting documentation for financing plans and grant applications State Updated Levee Evaluations for Basin Wide Feasibility Studies and 2017 CVFPP Early input for Regional Flood Management Planning Yolo Bypass/Cache Slough IWMP Federal Reference information for USACE Planning Studies/Civil Works Projects Continued support in addressing flood risks in SJRRP implementation Coming Soon: Web-based access to the entire body of knowledge 3
4 Goals evaluation of SPFC/appurtenant non-project levees Preliminary levee repair remedies and costs Consideration for urban and non-urban area protection Support CVFPP Footprint Levee Evaluation Program Urban levee miles Non-Urban - 1,650 levee miles Overview 4
5 ULE Phased Implementation STEP 1 Historical Data Collection STEP 2 Initial Field Investigation STEP 3 Preliminary Analysis Data Review Data Technical Review Memorandum (TRM) Phase 1 Field Exploration and Laboratory Testing Data Technical Review Memorandum (TRM) Perform Phase 1 Analyses Phase 1 Evaluation Report (P1GER) STEP Supplemental Final Historical Initial Preliminary Analyses Field Data Field Analysis and Collection Investigation Report Supplemental Phase Data Final 1 Supplemental Phase 1 Perform Technical Field Exploration Data Supplemental Phase 1 Evaluation Review Data and Review Laboratory Analyses Memorandum Report Testing (P1GER) (SGDR) (TRM) (GER) STEP 4 Supplemental Field Investigation Supplemental Field Exploration and Laboratory Testing STEP 5 Final Analyses and Report Perform Supplemental Analyses Supplemental Data Report (SGDR) Final Evaluation Report (GER) 5
6 NULE Phased Implementation Phase 1 (For All NULE Areas) Phase 2 (Selected Areas) Data Collection & Geomorphic Studies Assessment Remediation Alternatives & Cost Estimates Field & Laboratory Investigations Analysis & Cost Estimates Updates Geomorphic Studies Maps & Project Database Assessment Report (GAR) Remedial Alternatives & Cost Estimating Report (RACER) Data Report (GDR) Overview Report (GOR) 6
7 TYPE Data Collected Data Collected Historical Data Historical levee documents (>8,000) >10,000 Docs Agency research/interviews (>2,000) Topography Aerial LiDAR survey with video (510 miles) Bathymetry Geophysics Geomorphology Environmental Subsurface Investigations Land surveys (100,000 ft) Over-water channel topography (>100 miles) Aerial HEM (455 miles) Land-based galvanic resistivity (>100 mi) Geomorphic studies and map compilation Biological surveys Cultural surveys Cone Penetrometer Tests Rotary borings >5300 Sonic borings Other Test pits/hand augers Piezometers with instrumentation Laboratory testing (> 15,000) Vegetation Burrowing mammals 7
8 Tools and Analytical Products Data Collection/ Data Management Environmental Permitting & Cultural Resources Analyses Levee Performance Assessment Tools Remedial Alternatives & Cost Estimating Tool Document Database, POI Map Field Data Collection Tool Mapping Protocols Guidance Document > 1500 sections > 10,000 Analyses Levee Assessment Tool Performance/Fragility Curves Erosion Toolbox Seismic/Liquefaction Analyses Tools Suite of Well developed Remedial Alternatives Cost Estimating Tool for Levees 8
9 SAMPLE OF CURRENT APPLICATIONS Local Agencies State Federal SAFCA Natomas, Sacramento River projects, NEMDC and Arcade Creek Central Valley Flood Protection Plan (CVFPP) Feasibility Studies (Sutter, SJFCA, West Sacramento, Woodland) SBFCA : Feather River West Levee Improvement Project Central Valley Floodplain Evaluation and Delineation (CVFED) Levee Periodic Inspections West Sacramento Levee Improvement Program (WSAFCA) RD17 Levee Strengthening (SJFCA) Urban Levee Design Criteria (ULDC) Regional Flood Management Planning Levee Screening Assessment (LSAC) Ongoing Design Projects (Marysville, West Sacramento, Natomas) 9
10 Support to Other DWR Programs DWR Program Supported Activity Use of Levee Evaluation Data/Products NULE's Points of Interest (POI) data formed basis for identification of potential repair sites. Flood Maintenance Flood Projects San Joaquin River Restoration Program Other FloodSAFE Flood System Repair Project (FSRP) Rural Levee Repair Guidelines Emergency Levee Repairs San Joaquin Levee Evaluation Program (SJLE) Special Studies POI reconnaissance, assisted development of evaluation protocols and ranking of potential repair projects. NULE repair templates and parametric cost estimating tools used to prepare Pre-Feasibility Cost Estimates for eligible FSRP projects. Provided geotechnical support in developing uniform guidelines to assist State and local agencies Alternatives Design Report for emergency levee repairs for Chowchilla Bypass and Lower San Joaquin Levee District data report in support of levee repairs at Mormon Slough Developed flood risk criteria for SJRRP and prioritized levees for geotechnical evaluation. Coordinated levee crest road repairs during 2011 high water event to support increased restoration flows evaluation of 40 miles of levees for increased restoration flows using ULE/NULE evaluation protocols Levee Sesimic Vulnerability Assessment Assessment of Animal Burrow Persistence Influence of Levee Vegetation on Past Performance Vegetation Studies to support CVFPP Levee Vegetation Management Strategy 10
11 Local Agencies What s In It for You Get a jump start on your projects Understanding the guidelines, criteria and procedures for guidance documents, criteria, remedial alternatives, and preliminary costs Supporting documentation for financing plans and grant applications State Updated Levee Evaluations for Basin Wide Feasibility Studies and 2017 CVFPP Early input for Regional Flood Management Planning Yolo Bypass/Cache Slough IWMP Federal Reference information for USACE Planning Studies/Civil Works Projects Continued support in addressing flood risks in SJRRP implementation Coming Soon: Web-based access to the entire body of knowledge 11
12 QUESTIONS? GEOTECHNICAL EVALUATION OF CALIFORNIA S CENTRAL VALLEY LEVEES Steven Mahnke, PE GE California Department of Water Resources Sujan Punyamurthula, PhD, PE URS Corporation Mark W. Connelly, PMP Kleinfelder, Inc. Floodplain Management Association September 3,
13 CVFPP - Performance Curves 13
14 SJLE Levee Evaluation Program Support to Date Levee crest/access road repairs 18 miles SJLE explorations EB CPTs, 19 borings SJLE explorations 4A 21 CPTs, 5 borings SJLE analyses Seepage/Stability analyses to support increased SJRRP restoration flows NULE explorations 3/4A 114 CPTs, 22 borings Reach 2A SJLE - 18 CPTs, 8 borings NULE 50 CPTs, 18 borings 14
15 FSRP Repair Site Selection and Costing Sacramento Valley 106 Critical sites identified, evaluated, and vetted with local agencies Pre-feasibility cost estimate reports for each leveed area to support grant process San Joaquin Valley 15
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