Cane River Lake Spillway Rehabilitation of the... · Cane River Lake Information Located in...
Transcript of Cane River Lake Spillway Rehabilitation of the... · Cane River Lake Information Located in...
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Cane River Lake
Spillway Rehabilitation
2013 Louisiana Transportation Conference
Section 68 – Public Works
Randy Denmon, P.E., Denmon Engineering
Bradley Sticker, P.E., DOTD
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Topics
Background & Purpose
Spillway Data
Spillway History
Spillway Rehabilitation
Gate Rehabilitation
Concrete Rehabilitation
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Cane River Lake Information
Located in Natchitoches Parish
A relic Red River Channel
Classified Significant Hazard
16,000 Acre-Feet Storage
1,350 Acre Surface Area
• Approximately 34 miles long
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Cane River Lake Information
Two embankments
• North embankment near Natchitoches (part of Red
River Levee)
• South embankment near Derry under LA 484
One spillway structure
• LA 484 passes over spillway structure
North
Embankment South
Embankment
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Spillway Purpose
Lake and Spillway have multiple roles
Irrigation water supply
• Several thousand acres irrigated
Recreation
Drainage
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Spillway Data
LA 484 passes over spillway structure
Three sided weir inlet @ elev. 98.0’
(96’ total weir length)
Two 10’ wide by 5’ deep drawdown gates in
weir
Four 6’x6’ RCB conduits
56’ long with inlet invert
at elev. 90.0’
(conduit slope 27%)
Four 6’x6’ sluice gates
on RCB outlets
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Spillway Inlet
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Spillway Outlet
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Spillway History
Spillway designed by DPW in 1947
Cane River Levee and Drainage District
Awarded spillway contract July 20, 1948
Award amount $70,366.97
Completed July 8, 1949
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Spillway History
Embankment slides in early 1980s
Repaired 1983 with H piles and bulkhead
No record of replacement of drawdown
gates
Minimal maintenance over structure life
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DOTD Involvement
RS 38:306 D.
DOTD provides engineering work for Levee
Boards
Responsibilities:
NLDD responsible for earthen embankments
NLDD operates outfall gates on spillway
RS 34:3262 CRWC responsible for
establishment, operation and maintenance of
navigable waterway
DOTD responsible for LA 484 over spillway
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Why Was Rehab Needed?
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Why Was Rehab Needed?
Loss of the management gates:
Impact local farmers
Close lake to recreation
Impact riparian property value
Impact City of Natchitoches Festival of Lights
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DOTD Involvement
Provided historical documents
Provided review and consultation of
proposals
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SPILLWAY
REHABILITATION
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MAP
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SOIL TYPE - CLAY
LIQUID LIMIT: 71
P.I.: 24
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OLD PLANS
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EPOXY GROUTING
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PROBLEMS
350 LINEAR FEET CRACKS
2200 SQUARE FEET EXPOSED
CONCRETE
NEEDED TO GROUT AND SEAL
CRACKS
ALSO, COAT THE SPILLWAY WITH A
CORRISION INHIBATOR
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SPECIFICATIONS
STRUCTURAL REPAIR OF CONCRETE
CRACKS BY INJECTION OF EPOXY
RESIN ADHESIVE – LTRC, 1989
EVALUATION AND REPAIR OF
CONCRETE STRUCTURES, USACE, EM
1110-2-2002, 1995
STRUCTUAL CRACK REPAIR BY
EPOXY INJECTION, ACI, 2003
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PRODUCTS
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SPECIFICATON - ACI
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Up close injection
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EPOXY GROUTING
COST: $85/FOOT (CRACK REPAIR)
$3.35/SQ. FT. (COATING)
TOTAL COST: $39,120
VERY QUICK AND ECONOMICAL
REPAIR
MANY LAKES IN LOUISIANA ARE 50 TO
80 YEARS OLD WITH LITTLE OR NO
MAINTENANCE