RED FLAG STUDYv2

Slide1: 

ODOT GEOTECHNICAL ENGINEERING CONSULTANT WORKSHOP May 2, 2005

Slide2: 

ODOT DISTRICT GEOTECHNICAL ENGINEERS D-1 Russ Slonecker 419-222-9055 x 236 Russ.Slonecker@dot.state.oh.us D-2 Doug Rogers 419-373-4397 Doug.Rogers@dot.state.oh.us D-3 Dave Baraty 419-207-7052 David.Baraty@dot.state.oh.us D-4 Alex Bredikhin 330-786-3100 Alexandre.Bredikhin@dot.state.oh.us D-5 Nikunj Kadakia 740-323-4400 x 5114 Nikunj.Kadakia@dot.state.oh.us D-6 Qi Unterreiner 740-833-8057 Qi.Unterreiner@dot.state.oh.us D-7 Michelle Porr 937-492-1141 Michelle.Porr@dot.state.oh.us D-8 Joe Smithson 513-932-3030 Joe.Smithson@dot.state.oh.us D-9 Chad Mitten 740-774-8978 Chad.Mitten@dot.state.oh.us D-10 Jason Wise 740-373-7317 Jason.Wise@dot.state.oh.us D-11 Jim Graham 330-308-3980 x 3980 Jim.Graham@dot.state.oh.us D-12 Jim Marszal 216-584-2128 James.Marszal@dot.state.oh.us

Slide3: 

ODOT CENTRAL OFFICE GEOTECHNICAL COORDINATORS Geotechnical Program Coordinator (GPC): Steve Sommers 614-275-1356 Steven.Sommers@dot.state.oh.us Foundation Engineering Coordinator (FEC): Peter Narsavage 614-466-4318 Peter.Narsavage@dot.state.oh.us Construction Geotechnical Engineer (CGE): Randy Morris 614-644-6638 Randy.Morris@dot.state.oh.us Construction Structures Engineer (CSE): Scott LeBlanc 614-644-6628 Scott.LeBlanc@dot.state.oh.us

RED FLAG STUDY: 

RED FLAG STUDY Standard Template for Geotechnical Engineering

What is a Red Flag study? : 

What is a Red Flag study? Compilation of all existing geotechnical information in the proximity of the site Thorough over view of the project area

A Red Flag study does not involve:: 

A Red Flag study does not involve: Drilling Field sampling Detailed field review

Purpose: 

Purpose The purpose of this Red Flag Summary is to identify geotechnical concerns that could cause revisions to the anticipated design and construction scope of work, the proposed project development schedule, the estimated project budget, or the potential impacts of the project on the surrounding area. Of particular concern to geotechnical engineering, “Red Flag” features may include, but are not limited to, known or suspected geologic hazards (e.g., organic soils, karst, rockfalls, landslides, surface and underground mines, poor subgrade conditions, or difficulty in correcting existing surface or subsurface drainage problems).

Team Approach: 

Team Approach Geotechnical Engineer Geologist/Engineering Geologist Environmental Specialist

Introduction : 

Introduction Provide a project description Define the project limits Include information on location of site USGS Quadrangle, Township, Section No. Consider all the reference sources

STA/COL-30: 

STA/COL-30 North & South Corridors

STA/COL-30: 

STA/COL-30 Corridor Boundaries

References: 

References ODOT Sources Plan views, profiles, and cross-sections Construction diaries and inspection reports Compile information on changes to the plans during construction activities (e.g., slope, spring drains) Interview people knowledgeable with the previous projects Maintenance records Boring logs & lab results on file with OGE History and occurrence of landslides, mine subsidence, and rockfalls

Archived Files : 

Archived Files 21,000 Project Files Pilot Study 1,538,000 sheets of 8.5” x 11” records 50,300 plan sheets of 24” x 36” records Estimated Value $500 Million Production Run for Scanning Cost: $360,000 Time: 18 months

Description: 

Description Card Files

Description: 

Description Card Files Project Boxes

Description: 

Description Card Files Project Boxes Plan Sheets

Description: 

Description Card Files Project Boxes Plan Sheets Project Files

ODNR Sources : 

ODNR Sources Division of Geologic Survey http://www.dnr.state.oh.us Boring logs on file Measured geologic sections Bedrock Geologic Maps Bedrock Topography Maps Bedrock Structure Maps GIS Example: FRA-270 Geologic Map of Ohio Quaternary Geology of Ohio Known and Probable Karst in Ohio

Slide21: 

FRA-270 North Outer Belt Glacial Deposits Bedrock Topography

ODNR cont.: 

ODNR cont. Bulletins Information Circulars Report of Investigations Location and information on underground mines Location and characteristics of karst features Landslide maps: GIS Example: Mines

STA/COL-30: 

STA/COL-30 Landslides mapped by USGS (1978)

STA/COL-30: 

STA/COL-30 Underground Mines Shafts & Entries

STA/COL-30: 

STA/COL-30 Underground Mines Shafts, Drifts, and Slope Entries Mine Subsidence Events -- MRM Unmapped/Unknown Mine Points

Slide26: 

Division of Mineral Resource Management Applications and permits files for surface mines (coal & industrial mineral) GIS Example: SMUGM Active, reclaimed or abandoned surface mines Abandoned Mine Land (AML) sites Emergency Projects

STA/COL-30: 

STA/COL-30 Surface Mines Borehole Logs

Slide28: 

Division of Soil & Water Water well logs GIS Example: WAY-30 Soil Surveys GIS Example: Soils Ohio Wetland Inventory Maps National Wetland Inventory Maps Presence of lake bed sediments, organic soils or peat deposits

WAY-30: 

WAY-30 Water Wells Cut Slope Heights

Slide30: 

County Soil Survey

Other Sources: 

Other Sources Aerial photographs Satellite imagery USGS quadrangles USGS publications and files City and County Engineers Academia with engineering or geology programs USGS Open File Map Series #78-1057 “Landslides and Related Features”

Geology: 

Geology Provide a brief geologic description of the project area Provide a description of the hydrogeologic setting Describe the characteristics of the soils Describe the characteristics of the rock

Plan Observations: 

Plan Observations Provide a bulleted list of all pertinent features found during the plan and specification review Include findings from previous geotechnical reports or investigations Develop profiles to graphically present subsurface conditions (e.g., soil, rock, groundwater) Describe soil classifications (types) and problem conditions Describe bedrock and problem conditions

Field Review: 

Field Review Summarize the findings from a complete field reconnaissance Provide bulleted items with references to locations GPS coordinates: point, line, area Include conditions of embankments, soil & rock cut slopes, surface water erosion, ground water seeps or springs, settlements, surface deformation, abnormal pavement cracking, etc.

District Notations: 

District Notations Provide synopsis of information compiled through the District and County Garages Include construction issues and maintenance problems

Summary: 

Summary Extensive literature search Get as smart as we can! Site review Review areas of concern Identify geohazards in the proximity Graphical representation of the project area

List of References: 

List of References CONSULTANTS District City ODNR ODOT County OEPA USGS Academia

Deliverables: 

Deliverables plan views geologic cross-sections boring logs soil and rock testing data This information should be augmented with data from ODOT’s archived files of previous projects in the area. Additional information on soil survey data, glacial deposits, bedrock topography, bedrock structure, and aquifer mapping, etc. should be compiled as a GIS workspace in MS Access. Both digital ortho-quarter quadrangles and U.S.G.S. quadrangles should be available for base mapping. Copies of the reference maps and ArcView files should be provided.

Slide40: 

THANK YOU!