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Bridge 496 Replacement Project Scoping Meeting

Bridge 496 Replacement Project Scoping Meeting. RC1631 / Survey No. 4356 / UPI No. 11-0002-1. Location. MP 9.0 Index Galena Road @ Howard Creek . Existing Bridge. Looking Northerly at Bridge 496 . Looking downstream at Bridge 496. Issues. Structurally Deficient Bridge

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Bridge 496 Replacement Project Scoping Meeting

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  1. Bridge 496 Replacement Project Scoping Meeting RC1631 / Survey No. 4356 / UPI No. 11-0002-1

  2. Location • MP 9.0 Index Galena Road @ Howard Creek.

  3. Existing Bridge Looking Northerly at Bridge 496 Looking downstream at Bridge 496

  4. Issues • Structurally Deficient Bridge • SSD rating 6.0 out of 100 • Load limited at 5 tons • Accessible from Jack’s Pass only, due to I-G washout at MP 6.4-6.9. • Precludes delivery of ready mix concrete. • Potential issue with 80 ft girder delivery.

  5. Issues • Residents between washout and Bridge near MP 7

  6. Issues • Existing Stopping Sight Distance does not meet EDDS for posted speed limit 35 mph. • Bridge is located on a crest curve, vs. sag. • Existing SSD is OK for 30 mph 200’ min.

  7. Issues • Drainage concept • Low added new impervious. • Mimic existing flow patterns.

  8. Issues • Thalweg clearance from existing structure appears low, at about 5 ft. • 3 ft clearance from 100 yr flood per EDDS may not be feasible, depending on hydraulic conditions, and structure type. • SWM to assist with 100 yr WSE

  9. Funding • FHWA / WSDOT • Highway Bridge Program • 2010 call for projects • FHWA grant # BROS – V 310 (002) • 80 ft bridge length • 28 ft curb to curb • Agreement # LA 7374 • PE Funds obligated 04-07-2011

  10. Budget • PE Funds: • $339,542 Federal funds (80%) • $84,885 County funds (20%) • Total PE budget $424,427 • Total estimated project cost $2,373,494

  11. Current TIP

  12. Milestones • NEPA kickoff 03/2013 • Environmental Docs approved 02/2015 • ROW complete 01/2016 • Advertisement 02/2016 • Contract Award 03/2016 • Tied bid with Index-Galena project • Open to traffic 04/2017

  13. Project Needs • Permit assistance / biological assessment • ROW / Construction easements • Geotech recommendations • Substructure type • Hydraulic • Scour • 100 yr WSE • Rip rap size

  14. Resource budgets • Provide by 04/19 • Other questions?

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