ODOT Structure Project

ManagementSeminar

Structure Type Study

PDP Step 1 thru 6 (Major)• Step 1 - Define study area and stakeholders

involved• Step 2- Data collection, base maps, RED

FLAG SUMMARRY. Purpose and need statement

• Step 3 - Broad Conceptual Alternatives• Step 4 – Develop Strategic Plan and

Recommended Scope• Step 5 – Develop Conceptual Alternatives• Step 6 – Refinement of Feasible Alternatives.

FIRST VALUE ENGINEERING STUDY

Step 2 - Red Flag SummaryAppendix H in the PDP Manual1. Environmental Issues – Historical Bridge,

FEMA Flood Plain2. Geometric, Pavement Issues 3. Hydraulic Issues4. Geotechnical Issues – Slope failures,

scour, poor materials 5. STRUCTURE ISSUES6. MOT, Right of Way, Utility, Permit Issues7. Misc. Issues – Aesthetics, VE study

required

Structure Issues

• Existing Structure Condition• Deck Cores Required• Railing meet Current Standards• Hydraulic Capacity • Possible Channel Relocation• Temporary Shoring for Railroads• Any Substructure Movement

Additional Structure Issues

• “Landmark” structure • Navigable Waterway – United

States Coast Guard, determine navigation clearances. Movable or fixed spans.

Step 6 - 1st Value Engineering • For projects over 25 million• Multiple discipline teamWorkshop• Information Phase – Consultant provides • Brainstorming – Creative thinking• Evaluate alternatives • Constructability review• Present VE ideas to Owner/Designer• Office of Production - Facilitator

Project Development

Process (Major) Step 7

Develop Preferred Alternative

Structure Type StudyObjective

• Select the best Structure Alternative • The study must provide ODOT with all the

project constraints, background, facts and insights to support the preferred structure alternative selection.

• More upfront preliminary engineering and project team involvement to better assist the design decision making process.

• Documentation of the reasoning behind project related decisions

Structure Type StudyWhen Required

• Required in the Preferred Alternative Verification review submission for a Major Project (Step 7)

• Required in the Minor Project Preliminary Engineering Study review submission (Step 3)

• Not required for projects classified as Minimal

Project Development Process

Step 7: Develop Preferred Alternative

• Based on Agency and Public comments- Recommend preferred alternative– ODOT’s recommendation only.

• Submit Preferred Alternative Verification Study- (Design only report L&D 1403.5)

Preferred Verification Study • Design Topics

– Survey– Geometrics– Geotech– Pavements– Drainage– Structure Type

Study– Maintenance of

Traffic – (Cont.)

• Structure Type Study– Hydraulic study and scour– Structure Types– Clearances

• Maintenance of Traffic:– Permitted Lane Closures

Exceptions Committee

Step 7

Ohio Depar t ment of Tr anspor t at ion

Preferred Verification Study • Design Topics (cont.)

– Traffic Control– Other– Right of Way– Environmental– Sheets– Cost Estimates– Reviews

• Environmental– FEMA Zones– Stream/Wetland Mitigation– Waterway permits

(Determination or Draft Permit)

– Permissible waste and borrow areas

– Environmental Commitments

Step 7

Preferred Verification Study • Design Topics (cont.)

– Traffic Control– Other– Right of Way– Environmental– Sheets– Cost Estimates– Reviews

• Cost Estimates– ROW Acquisition– Utility Reimbursement– Construction

Step 7

201.2 STRUCTURE TYPE STUDY SUBMISSION REQUIREMENTS

A. Profile for each bridge alternative Section 201.2.1

B. Preliminary Structure Site Plan Section 201.2.2(preferred bridge alternative)

C. Hydraulic Report Section 201.2.3

D. Narrative of Bridge Alternatives Section 201.2.4

E. Cost Analysis Section 201.2.5

F. Foundation Recommendation Section 201.2.6

G. Preliminary Maintenance of Traffic Plan Section 201.2.7

201.2 STRUCTURE TYPE STUDY SUBMISSION ADDITIONAL RELATED

ITEMS • Retaining Wall Justification L&D Section

1404.2

• Noise Wall Justification ODOT Policy #21-001

• Pedestrian Overpass Justification L&D Section 1404.4

• Special Design Submission to OSE if there are non-standard designs, special railing, fracture critical elements, etc.

• Aesthetics

• Constructibility

201.2 STRUCTURE TYPE STUDY SUBMISSION REQUIREMENTS

A. Minimum Requirements for Submission B. Based on the complexity of the project some

work in Step 8 may be pertinent to perform in Step 7

C. Example – A project in an highly urban, high traffic setting may require more in-depth development of the Maintenance of Traffic to ensure it’s feasibility and cost

201.2 STRUCTURE TYPE STUDY SUBMISSION REQUIREMENTS

A. Profile for each bridge alternative Section 201.2.1

• Main characters are the existing and proposed profiles, ground line, water elevations and outline of structure

• Profile is an abbreviated version, items not required footing, bedrock, top of slope elevations, etc.

• Horizontal and Vertical Clearances need to be shown

201.2 STRUCTURE TYPE STUDY SUBMISSION REQUIREMENTS

A. Profile for each bridge alternative Section 201.2.1

B. Preliminary Structure Site Plan Section 201.2.2

• Site Plan with Plan and Profile view required for preferred alternative only

• Plan view of existing and proposed, contours, utilities, hydraulic & traffic data, proposed and existing structure blocks.

• Window dressing not required for example guardrail stationing, treatment of slopes, etc. (BDM 202.2.1)

201.2 STRUCTURE TYPE STUDY SUBMISSION REQUIREMENTS

A. Profile for each bridge alternative Section 201.2.1B. Preliminary Structure Site Plan Section 201.2.2

C. Hydraulic Report Section 201.2.3

• All hydraulic analysis done at this stage, including scour for all the alternatives

• SS 832 – potential placement of temporary construction access fills

201.2 STRUCTURE TYPE STUDY SUBMISSION REQUIREMENTS

A. Profile for each bridge alternative Section 201.2.1B. Preliminary Structure Site Plan Section 201.2.2C. Hydraulic Report Section 201.2.3

D. Narrative of Bridge Alternatives Section 201.2.4

Provide In-depth Insight- List Factors

• Geometry, alignment (curved/skew), grades (min. for deck drainage) horizontal and vertical clearances, clear/sight distance, superelevation requirements, etc.

• Future maintenance concerns• Right of Way impacts• Disruption to traveling public, user cost

Provide In-depth Insight- (continued)

• Construction access to site – transportation of members (weight or length restrictions)

• Any SI-9 “build bridges faster” opportunities• Utilities• Misc. scour, stability of slopes, debris/ice flows in river• Project aesthetics, project corridor• Rehabilitation projects – Fatigue evaluation, color

photographs, summary of field investigation

201.2 STRUCTURE TYPE STUDY SUBMISSION REQUIREMENTS

A. Profile for each bridge alternative Section 201.2.1B. Preliminary Structure Site Plan Section 201.2.2C. Hydraulic Report Section 201.2.3D. Narrative of Bridge Alternatives Section 201.2.4E. Cost Analysis Section 201.2.5• Cost analysis for all alternatives• Major cost rule 80/20, C-1 estimate • Initial and maintenance cost converted to present cost• Contingency items use between 15 to 20%

– Based on % design completed• For rehabilitation projects cost over-runs should be

expected• Required estimating software “Estimator 2.2” for all

ODOT budget estimating. Office of Estimating has a training course.

• ODOT “Summary of Contracts Awarded”• www.dot.state.oh.us/CONTRACT/estimating/

CustSupport/services.htm

Life Cycle Analysis• FHWA Executive Order – “…consider the

use of life cycle cost…”• Initial cost (replacement cost)• Cost accrued by traveling public due to

delays/detours (rehabilitation v. replacement)

• Maintenance costs of various structure types– from year 1 to year 39 (0% @ year 1 to

2% @ year 39 of replacement cost, repeat at year 41after major rehabilitation) Uniform Gradient

• Future major rehabilitation – coatings (sealers, painting), deck replacement– At year 40 new deck

Span Optimization Chart

• To be used for 4 or more spans

201.2 STRUCTURE TYPE STUDY SUBMISSION REQUIREMENTS

A. Profile for each bridge alternative Section 201.2.1B. Preliminary Structure Site Plan Section 201.2.2

(preferred bridge alternative)C. Hydraulic Report Section 201.2.3D. Narrative of Bridge Alternatives Section 201.2.4E. Cost Analysis Section 201.2.5

F. Foundation Recommendation Section 201.2.6

201.2 STRUCTURE TYPE STUDY SUBMISSION REQUIREMENTS

A. Profile for each bridge alternative Section 201.2.1B. Preliminary Structure Site Plan Section 201.2.2

(preferred bridge alternative)C. Hydraulic Report Section 201.2.3D. Narrative of Bridge Alternatives Section 201.2.4E. Cost Analysis Section 201.2.5F. Foundation Recommendation Section 201.2.6

G. Preliminary Maintenance of Traffic Plan Section 201.2.7• Transverse sections showing all stages of removal and

construction• Define temporary lane widths, lateral clearances to barriers, type

of temporary barriers, cut lines, any modifications to existing structure require, closure pour locations

• Temporary shoring considerations• Consider effects of differences in profile grade and alignment

Example List of Contentsfor Structure Type Study

• Listing of Alternatives• Project description and overview• Roadway alignments/geometry• Maintenance of traffic• Maintenance and inspection access• Design criteria – road type, traffic, typical

roadway, loading, etc.• Narrative of Bridge Alternatives• Cost comparison and life cycle considerations• Conclusion and recommendation• Preferred site plan, transverse section and

misc. details• Alternative profiles• Appendix – cost estimate and quantity

breakdown, foundation recommendation

EXAMPLE