txdot’s role in flood management
DESCRIPTION
TxDOT’s Role in Flood Management. Jack Kayser, P.E., Ph.D., CFM TxDOT – Austin District – Hydraulics Team Flash Flood Awareness Meeting October 8, 2010. Texas Department of Transportation. Outline of Presentation. TxDOT’s Organizational Structure Jurisdiction and Responsibilities - PowerPoint PPT PresentationTRANSCRIPT
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TxDOT’s Role in Flood Management
Jack Kayser, P.E., Ph.D., CFMTxDOT – Austin District – Hydraulics Team
Flash Flood Awareness Meeting
October 8, 2010
Texas Department of Transportation
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Outline of Presentation
- TxDOT’s Organizational Structure
- Jurisdiction and Responsibilities
- Emergency Flood Response Procedures
- Contributions to Floodplain Management
- Process of Hydrology and Hydraulic Design
- Example of Cross Drainage Culvert Design
- Summary and Conclusions
- References
Texas Department of Transportation
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TxDOT’s Organizational Structure
Texas Department of Transportation
As of August 2009 there are 13,015 TxDOT employees, 11.7% of which are P.E.s or E.I.T.s [1].
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Jurisdiction and Responsibilities
Texas Department of Transportation
For Travis and Williamson Counties there are 1,170 On-System miles and 7,205 Stratmap miles,statewide there are 80,067 On-System miles and 306,403 Stratmap miles (centerline miles) [2].
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5Texas Department of Transportation
Jurisdiction and Responsibilities
On-System:- Plan, Design, Build, Operate, and Maintain- Emergency Response
per internal and external request
Off-System: - Inspect All Public Bridges and Bridge Class Culverts- Oversight of Federal Transportation Funds- Emergency Response
per Governor’s Office of Emergency Management
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Emergency Flood Response Procedures [3]
Maintenance personnel are encouraged to use their own judgment, eliminating chain of command delays. Such personnel often personally know local DPS, Fire and EMS personnel. 73% of TxDOT staff are over 40 years of age and 53% have 11 or more years with the agency [4].
Texas Department of Transportation
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Highway Condition Reporting System
Texas Department of Transportation
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Contributions to Floodplain Management
Texas Department of Transportation
Sponsored USGS anduniversity hydrology andhydraulic research andpublications, used inengineering practice.
Standard hydraulic structuredesigns and specifications,used throughout the industry.
Hosting and supporting theTFMA – NFIP training program from 2004 to 2008.
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Process of Hydrology and Hydraulic Design [5]
Texas Department of Transportation
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Example of Cross Drainage Culvert Design
Texas Department of Transportation
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11Texas Department of Transportation
Where is Structure - What is Scope of Work
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12Texas Department of Transportation
Delineation of Watershed
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13Texas Department of Transportation
Delineation of Channel
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Revision of Conveyance Due to Ditch Carryover
Texas Department of Transportation
Existing FM487 Sta 313+00
675
680
685
690
695
700
30750 31250 31750 32250 32750 33250 33750
Station
Ele
vati
on
North Ditch Profile
Road Profile
South Ditch Profile
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Hydraulic Analysis of Culvert and Ditch
Texas Department of Transportation
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Summary and Conclusion
Texas Department of Transportation
- Two central aspects of dealing with floods:
a. Responding
b. Mitigation- Nature of TxDOT’s response depends on the
situation:
a. On-System versus Off-System
b. How the request reaches Maintenance
c. Decisions Made On-Site- Mitigation is made up of two parts:
a. Identifying the Risks
b. Avoiding Adverse Impacts
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17Texas Department of Transportation
References
1. Highway Engineer Staffing Analysis, Texas Comptroller of Public Accounts, January 2010, page 7.
2. Annual Report – Highway Status Open to Traffic Only, Texas Department of Transportation, Transportation Planning and Programming Division, August 17, 2009.
3. Information Sharing Plan – Austin District, June 8, 2010
4. Survey of Organizational Excellence Data Report, Texas Department of Transportation, 2008, pages 2 and 3.
5. Hydraulic Design Manual, Texas Department of Transportation, March 2009.
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Questions?
Texas Department of Transportation