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Mini case study: 1 of 14

LPSTP CONFIGURED AS A FALSE BANKLINE ON A LARGE RIVER, MINIMAL BACKFILLING BEHIND LPSTP.

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Mini case study: 1 of 14

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  1. LPSTP CONFIGURED AS A FALSE BANKLINE ON A LARGE RIVER, MINIMAL BACKFILLING BEHIND LPSTP Grand River at Route “A” 100 miles north of Kansas City, MO. {rural, sand-gravel, slope <1%, pool-riffle-pool, meandering} Kansas City District Corps of Engineers Section 14 project, emergency bank stabilization to protect existing public works (highway and bridge). I was involved in the conceptual design, & HNTB, Inc. developed Plans and Specs. Much thanks to John Blancett for pix. Mini case study: 1 of 14

  2. LPSTP Cross-sections. Top bank = el. 806 Q-2 flow = el. 803 LPSTP crest = 793 Designed to be overtopped 13 days/yr. Core section of LPSTP was built of a less expensive stone, while quarry run stone was used for all exposed surfaces Pix by John Blancett, HNTB, Inc. Mini case study: 2 of 14

  3. Planform design drawing from HNTB. The bend US of this bend had migrated 1,100 ft in 59 years. Bridge LPSTP Key Existing bridge protection Tie-backs & keys Pix by John Blancett, HNTB, Inc. Mini case study: 3 of 14

  4. LPSTP on a large river, looking US. The bend US of this bend had migrated 1,100 ft in 59 years. Pix by John Blancett, HNTB, Inc. Mini case study: 4 of 14

  5. Looking DS, Grand River, flowing into Route “A” bridge approach, pre-project conditions Pix by Derrick Mini case study: 5 of 14

  6. Great shot, note old bank angle approach and new LPSTP flow approach angle into Route “A” highway bridge NEW APPROACH ANGLE Old approach angle Pix by John Blancett, HNTB, Inc. Mini case study: 6 of 14

  7. Note LPSTP, tie-backs (ridges of stone going back to bank), & keys (keys are buried in the bank) Grand River at Route “A”, north of St. Joe, MO Pix by John Blancett, HNTB, Inc. Mini case study: 7 of 14

  8. How cool would it have been to grab some of these US willows & put an instant forest down in that mud flat in the previous picture!? Pix by Derrick Mini case study: 8 of 14

  9. Looking US, flow at crest of LPSTP, Grand River at Route “A”, South of Albany, MO. Q-2 flow would be 3 ft below top bank. Pix by John Blancett, HNTB, Inc. Mini case study: 9 of 14

  10. June 2001 - Looking US at just completed project. Grand River @ Rt. “A”, MO Pix by John Blancett, HNTB, Inc. Mini case study: 10 of 14

  11. Looking US. Note deposition and veg within first year after completion. Grand River @ Rt. “A”, MO Pix by John Blancett, HNTB, Inc. Mini case study: 11 of 14

  12. Sept 2002 – 1 year after completion. Looking US. Nature is “softening” the project. Grand River @ Rt. “A”, MO Pix by John Blancett, HNTB, Inc. Mini case study: 12 of 14

  13. May 3, 2006 – 5 years after completion. Looking US. Native vegetation improves project aesthetics/functions, Grand River @ Rt. “A”, MO Pix by John Blancett, HNTB, Inc. Mini case study: 13 of 14

  14. Oct 4, 2007 - After 6 years robust native vegetation results in a fully functional project, Grand River @ Rt. “A”, MO Pix by John Blancett, HNTB, Inc. Mini case study: 14 of 14

  15. REGARDING QUESTIONS, I AM ALL EARS !!! Each ear 10 inches long Cleophus at 8 weeks

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