Chapter 6: Bridge Project Development Reference Information

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Section 1: Bridge Project Development Submission Schedules

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Submission Schedules

The estimated duration for the submission of preliminary bridge layouts and project development is provided in the table below. This table assists with ensuring the project is completed in time for scheduled letting.

Anchor: #i1015955Table 6-1: Typical Bridge Project Development Submission Schedule

Work Type

Typical Overpass

Typical Stream Crossing

Railroad Overpass

Railroad Underpass

Widenings/Rehabs

Interchanges

Condition survey, load rating calculation, deck cores, etc.

 

 

 

 

3 months

 

Division PBLR review

2 weeks

2 weeks

2 weeks

2 weeks

2 weeks

2 weeks

FHWA PBLR review

1 month

1 month

1 month

1 month

1 month

2 months

Railroad Exhibit A approval

 

 

12 months

24 months

 

 

Bridge plan preparation and scheduling

3 months

3 months

3 months

4-5 months

3-5 months

7-12 months

District review and comments

1 month

1 month

1 month

1 month

1 month

1 month

PS&E processing

3 months

3 months

3 months

3 months

3 months

3 months

Total lead time required before letting

8 months

8 months

20 months

33-34 months

11-13 months

13-18 months



Anchor: #i1018055Table 6-2: Specific Geotechnical Project Development Schedule

Work Type

Small Scale

Large Scale

Specialty/Other

Borings: Bridge

All bridge lengths - 4 months

Borings: Retaining Wall

All bridge lengths - 4 months

Foundation Design#

L < 400 ft.;1 Month

L > 400 ft.;2 Months

L > 400 ft. Single Column Bents, Designed for Lateral Loading, Etc.;3 to 4 Months

Slope Stability Analysis**

L < 150 ft.; 1-2 Months

L > 150 ft.; 2-4 Months

 

Retaining Wall Design*

H < 20 ft.; L < 350 ft.

H < 20 ft.; 350 ft. < L < 1000 ft.

 

  • MSE Wall

1 Month

1.5 Months

2 Months

  • Concrete Block Wall

1 Month

1.5 Months

2 Months

  • Sheet Pile

2 Months

2 Months

2 Months

  • Soil Nail

1.5 Months

2 Months

3 Months

  • Tie-Back

2 Months

2.5 Months

3 Months

  • Drilled Shaft

2 Months

2.5 Months

3 Months



Legend:

# - After borings and the layout have been submitted

* - After borings, layout, survey, and cross sections have been submitted

** - After borings, layout, survey, and cross sections have been submitted

Example: Total Time for Retaining Wall Detail Sheets = Retaining Wall Borings + Wall Design = 4 Months + Wall Design Time

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