S68_Rehabilitation of the Cane River Spillway_LTC2013

7/29/2019 S68_Rehabilitation of the Cane River Spillway_LTC2013

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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

NorthEmbankment

SouthEmbankment


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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 inweir

Four 6x6 RCB conduits56 long with inlet invertat elev. 90.0

(conduit slope 27%)

Four 6x6 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 drawdowngates

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 forestablishment, operation and maintenance ofnavigable 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 ofproposals


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SPILLWAYREHABILITATION


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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 EXPOSEDCONCRETE

NEEDED TO GROUT AND SEALCRACKS

ALSO, COAT THE SPILLWAY WITH ACORRISION INHIBATOR


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SPECIFICATIONS

STRUCTURAL REPAIR OF CONCRETECRACKS BY INJECTION OF EPOXYRESIN ADHESIVE LTRC, 1989

EVALUATION AND REPAIR OFCONCRETE STRUCTURES, USACE, EM1110-2-2002, 1995

STRUCTUAL CRACK REPAIR BYEPOXY 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 ECONOMICALREPAIR

MANY LAKES IN LOUISIANA ARE 50 TO80 YEARS OLD WITH LITTLE OR NOMAINTENANCE

S68_Rehabilitation of the Cane River Spillway_LTC2013

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