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RCC Overtopping Construction
Case Studies and Lessons Learned
Jeremy Young, PE
May 6, 2015
POE DAM  CENTRE CO., PA
Existing Conditions
33 High Earth Dam
Masonry Ogee and Chute
30-inch Dia. CMP Outlet Conduit
RCC OT Case Studies - JYoung RCC2015
POE DAM  CENTRE CO., PA
Dam Safety Upgrades
Grout Spillway
Replace Outlet Tower
Slipline/Extend Outlet Conduit
RCC Embankment Armoring
Poe Dam, PA  Cross Section
Conduit Extension
Poe Dam, PA
Conduit Extension
Poe Dam, PA
Outlet Apron
Poe Dam, PA
RCC Apron Reinforcing
Poe Dam, PA
RCC Apron Reinforcing
Poe Dam, PA
Sloping RCC Apron
Poe Dam, PA
Drainfill Placement
Poe Dam, PA
Drainfill Placement
Fox Creek Dam, KY
Aggregate Stockpiling and RCC Mixing
Poe Dam, PA
Crushed Aggregate
One Pile  Dense Graded Road Base
2-inch MSA
Crest Detail
Poe Dam, PA
Endsill
Poe Dam, PA
Completed RCC/Final Site Grading
Poe Dam, PA
Completed 2008
$3.7M Total LS Bid
Unknown RCC Unit Price
10,600 CY RCC
400 LBS Cement/CY
Vebe 30 賊 5 seconds
Poe Dam, PA
Summary
LAKE ONEIDA DAM
BUTLER CO., PA
Existing Conditions
31 High Earth Dam
Projecting Concrete Weir and Chute
Two 30-inch Dia. DIP Blow-off/Supply Line
LAKE ONEIDA DAM
BUTLER CO., PA
Dam Safety Upgrades
Replace Spillway
Relocate Blow-off Line
RCC Embankment Armoring
Lake Oneida Dam - Stream Diversion
Phased RCC Placement
Lake Oneida Dam, PA
Phased RCC Placement
Lake Oneida Dam, PA
RCC Apron
Lake Oneida Dam, PA
Conventional Concrete Training Wall On Unformed Steps
Lake Oneida Dam, PA
Lake Oneida Dam - Summary
 Completed 2013
 $6.9M Total Cost
 $103/CY
 14,200 CY RCC
 350 LBS C+FA/CY
 35% Fly Ash (by wt.)
 2 Piles
 Natural River Sand
 Crushed OGS  1.5 MSA
 Vebe 30 賊 5 sec
Stoney Creek Dam  Bedford, VA
Conventional Concrete Training Walls On Formed Steps
Stoney Creek Dam  Bedford, VA
Converging Training Walls
Bear Creek Dam  Wise, VA
More Converging Training Walls
Unformed/Exposed Steps Allowed by USACE
Picatinny Arsenal, NJ
Photos courtesy of KC Construction
Control/Diversion of Water
Fox Creek, KY
GERCC Steps
Fox Creek, KY
Exposed GERCC Steps/Shrinkage Crack
Fox Creek, KY
Ogee Control Section
Fox Creek, KY
Fox Creek Dam, KY - Summary
Completed March 2011
$155/CY Avg Bid Price
10,000 CY RCC
400 LBS C+FA/CY
50% Fly Ash (by Wt.)
2 Piles
Natural River Sand
Crushed #8/#57 - 1.5 MSA
Vebe 20 secs
Armored Section Adjacent to Replacement Spillway
Lower Owl Creek Dam, PA
Lower Owl Creek Dam, PA
Sallys Pond Dam, NJ
Sallys Pond Dam - Design Concept
Sallys Pond Dam - Construction
Sallys Pond Dam - Construction
Sallys Pond Dam - Construction
Sallys Pond Dam, NJ
Completed 2008
$1.8 M Total LS Bid
2,400 CY RCC
330 Lbs Cement/CY
1.5 MSA
Vebe 30賊5 sec
Questions/Comments?

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RCC OT Case Studies - JYoung RCC2015

Editor's Notes

  • #3: Built by Civilian Conservation Corps in 1933 (check) State Park
  • #8: Stamped concrete
  • #9: May reconsider headwall for future designs. Could impinge on overtopping flow. Vertical obstruction.
  • #10: WWF included to prevent crack at upstream edge of apron if cutoff were undermined and foundation support was compromised. No. 4 bars were allowed as a substitute for WWF Design intent not fully communicated to construction staff. Bars installed incorrectly.
  • #11: WWF included to prevent crack at upstream edge of apron if cutoff were undermined and foundation support was compromised. No. 4 bars were allowed as a substitute for WWF Design intent not fully communicated to construction staff. Bars installed incorrectly.
  • #13: Note uplift relief drain
  • #14: Ask Aaron about successful placement?
  • #18: Unformed, uncompacted edges
  • #20: Built in 1928 (check) Water supply reservoir
  • #22: Full pool during construction required stream diversion/phased construction sequence
  • #23: Contractor proposed phased RCC placement to expedite construction Phase 1.1 concurrent with spillway construction
  • #24: Note sheet pile cutoff. Selected since sheet piles were used for cofferdam and diversion
  • #25: Rebar added to tie conventional concrete at sheetpile to RCC
  • #26: KC project Conventional concrete placed concurrent with RCC and PRIOR to compaction Issues with compacted concrete face being lower than conventional concrete duh Needed to smooth transition with grout/mortar
  • #27: Unformed compacted steps ok But poor treatment prior to placing conventional concrete training walls Needed to dry pack/injection grout fix
  • #29: Better success placing conventional concrete on formed steps
  • #30: Need info from Tom
  • #31: Need info from Joe
  • #32: Formed steps required by USACE KC proposed unformed/compacted steps. Close QC was required and allowed by USACE
  • #35: Unsightly shrinkage cracks (3X) formed on exposed face Contraction Joints could have been used But not a fatal flaw
  • #41: N values > 40. Dense alluvial deposits. OK for RCC support
  • #44: 2400 cy in about 3 weeks Complete by the end of april 2008