This session presents the history of bridge preservation projects and how we arrived at our current policy. Together we will discuss the development of the Hydraulics Request Application, demonstrate its use for INDOT’s hydraulic design, and review application submissions

Bailey, Mark

Wagner, Stephanie

English

Purdue E-Pubs

INDOT Hydraulics Process Modernization and Policy UpdatesStephanie Wagner, PE Director of Bridge EngineeringMark Bailey, PE  Director of HydraulicsHow did we get here?I-90 (NY State Thruway) over Schoharie Creek• Collapsed April 1987• 10 fatalities • 30-year-old bridge• 15,000 vehicles a day• +/- 10’ scour holeSnowmelt + 5.9” of Rain  = Est. 50 Yr. FloodSchoharie Bridge Investigation and Research• 1:50 Scale Model• Colorado State UniversityContributing Factors• Waterway Geometry• Sheet Piling Removed• Improperly Sized RiprapUS 51 over Hatchie River• Collapsed April 1989• 8 fatalities• Built in 1936Contributing Factors• Stream Migration• Foundations• Shallower in Floodplain• Independent Footings • Adjacent Structure National Reactions• 1988 National Bridge Scour Program initiated by FHWA• Policy applied to every bridge over a waterway (existing or under design)• Design for scour resistance • Evaluate existing bridges for scour vulnerability • Determine prudent measures to be taken• 1989 Indiana Dept of Highways releases updated Hydraulics Manual• Thru 1990’s • Started process of evaluating every existing bridges • Prioritized by a risk-based approach and within rehab projects• Constant reminders to designers• Isolated issues throughout the stateI-74 over Branch of Black Creek (1996)• Thursday of Race Weekend • Water Overtopped I-74 Westbound • Exposed Abutment Piles• Closed InterstateSR 446 over Little Salt Creek (April 1998)• Significant Spill-Slope Loss• Unsupported 10” RCBASR 446 over Little Salt Creek (Repaired)INDOT’s Plan in Action• New Bridges – Design for Scour• 18,000 Existing Bridges in Indiana??• Scour Analysis for every bridge project• Hundreds of design projects and targeted scour analysis contracts•• Meanwhile… Bridge Preventive Maintenance Program• Started in 2010’s• Many new work types (joint replacements, polymeric overlays) w/ shorter design life’s• Included existing work type: Rigid Overlays$3$10 $5$9$23$69$53$30$65$61$129$154$80$108$145$123$0$20$40$60$80$100$120$140$1602010201120122013201420152016201720182019202020212022202320242025MILLIONSTotal Budget for Bridge Deck Overlaysby Fiscal Year  Today • Schedule surprises• Waterway Permits• R/W Acquisition• Eliminates the scour analysis requirements for all PM projects• Why?• Shorter design life (lower risk)• Newer structures designed for scour (TYP.)• Existing scour analysis for most bridges• Exceptions• Bridges with Scour Analysis Status = 7 in BIAS*• Field observed scour must be addressed • Scour specific projects still require analysisDesign Memorandum No. 21-18* Revision forthcomingSign Up for Our Listserv Hydraulics Process Modernization and Policy Updates• Policy Updates1. Design Memo 21-182. Design Memo 21-XX 22-XX3. Indiana Design Manual re-write 4. Prequalifications5. In-kind replacements• Process Modernization1. Hydraulics Request Application (HRA)2. BIAS updatePolicy Updates – Design Memo 21-18• Memo was revised 2/9/2022Policy Updates – Design Memo 21-18Policy Updates – Design Memo 21-18Policy Updates – Design Memo 21-18Policy Updates – Design Memo 21-18Policy Updates – Design Memo 21-18Policy Updates – Design Memo 21-18Policy Updates - Design Memo 22-XX• Design Memo 22-XX (Requiring all hydraulic submittals to use the HRA starting on XX/22)Policy Updates – Design Manual re-write• Updates to 202• Re-write of 203• Incorporating the developing design guidance from the hydraulics website• Clarifying some grey areas, plugging some holes• Taking a corridor wide design approach instead of individual design elements• Bridge• Small Structure• Storm Drains• Ditches• DetentionPolicy Updates - Prequalifications• Prequalifications• Quantity Trigger – 15 or more in a rolling 12-month period• % Trigger - >= 60%Policy Updates – In-kind replacements• Operations Memorandum 11-06DesignersINDOT MaintenanceHydraulics Request Application (HRA)• Process Modernization• Why?Hydraulics Request Application (HRA)• History• One year of development time• Went live 3/26/2021 with a soft internal rollout• 6/29/2021 opened up for everyone• As of 3/7/2022 (roughly 8 months)• 306 users• 44 firms• 2,281 requests processed• 13,500 emails eliminated• At an average of 10 min. per request of time savings, 380 hours (so far)• https://itap.indot.in.gov/.• Click Enroll New ApplicationHRA DemonstrationHRA Demonstration• What role to you need to request?HRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationAll design requests have no required file types.Design Computations Plans Preliminary Memo Model ReportsBridge Scour One of these X X X One of theseReplacement Only One of these X X X One of theseOther One of these X One of theseDrainage Complaint One of these X One of theseLPA One of these X X X One of theseRoad: Storm Sewer or Detention Storm Sewer One of these X One of theseDetention One of these X One of theseOther One of these X One of theseSmall Structure Rehab and replacement options One of these X X One of theseReplacement only One of these X X One of theseHRA DemonstrationHRA DemonstrationHRA DemonstrationHRA DemonstrationQ&A / The EndContact Info•Stephanie Wagner(317) 233-2095swagner2@indot.IN.gov•Design Questions: BridgeDesignOffice@indot.IN.gov•Mark Bailey(317) 233-2096mbailey1@indot.in.gov•Design Questions: hydraulics@indot.in.gov

INDOT Hydraulics Process Modernization and Policy Updates

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INDOT Hydraulics Process Modernization and Policy Updates

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