W912P826BA081_Advertised_Plans.pdf

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Lake Pontchartrain Tributaries, Tchefuncte River Bar Channel, Maintenance Dredging, St. Tammany Parish, Louisiana ED 26-009
Solicitation number
W912P826BA081
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This is a set of design and contract specification documents for the Tchefuncte River Bar Channel Maintenance Dredging project in St. Tammany Parish, Louisiana, issued by the US Army Corps of Engineers, New Orleans District under Solicitation No. W912P826BA081.

The project involves dredging maintenance of the Tchefuncte River Bar Channel to maintain required navigation depths and widths. The channel design specifies a 125-foot bottom width with 1H on 2V side slopes to an elevation of +11.0 feet NAVD88. Dredging operations will occur from approximately C/L Station 1+50 through C/L Station 86+99.87, with a flare section expanding to 200 feet maximum width between C/L Stations 34+71.54 and 42+69.74. The contractor must not ascend the shoreline and all work shall be conducted from the open waters of Lake Pontchartrain. Stumps and debris will be encountered during dredging. Dredged material will be disposed in designated primary and secondary disposal areas within Lake Pontchartrain, with discharge location adjusted as disposal builds to an elevation of +3.0 feet NAVD88. No direct discharge outside delineated disposal areas (existing marsh) is permitted. Cross-section profiles provided throughout the documents establish existing conditions and required design grades, with multiple sections indicating no dredging required where existing bottom elevations already meet design specifications.

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Other files

File Type Posted
B01 - Bid Abstract_W912P826BA081_Signed.pdf PDF
Solicitation Amendment W912P826BA0810001 SF 30.pdf PDF
W912P826BA081 Solicitation Package.pdf PDF

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m US Army Corps of Engineers New Orleans District

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LAKE PONTCHARTRAIN TRIBUTARIES

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TCHEFUNCTE RIVER BAR CHANNEL

MAINTENANCE DREDGING

ST. TAMMANY PARISH, LOUISIANA

SOLICITATION NO.: W912P826BA081

CONTRACT NO.:

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THIS PROJECT WAS DESIGNED BY THE

NEW ORLEANS DISTRICT CORPS OF

ENGINEERS. THE INITIALS OR SIGNA

TURES AND REGISTRATION DESIGNA

TIONS OF INDIVIDUALS APPEAR ON

THESE PROJECT DOCUMENTS WITHIN

THE SCOPE OF THEIR EMPLOYMENT AS

REQUIRED BY ER 1110-1-8152. SIGNA

TURES INDICATE OFFICIAL RECOMMEN

DATION OF ALL DRAWINGS IN THIS SET.

APPROVED BY:

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IDENTIFICATION

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NORTH EDGE SOUTH EDGE

C/L CURVE 1 DATA Cfl CURVE 2 DATA OF CUT OF CUT

CURVE 2 DATA CURVE 2 DATA

6. 82° 2' 52.86' 6 83° 9' 5. 79" £:::, 83° 9' 5. 79" 6. 83° 9' 5. 79"

5" 51' 54.76" D 10° 25' 02.80" D 10" 27" .3.3.07" D 1398. 70' L 798.20' L 725.6.3' L

976. 77' 550.00' 500.00' R 849.64' 487.90' 443.54"

5" .32' 57.56'

010. 76' s88.5o0

600.00' 532.25'

LAKE PONTCHARTRAIN

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SEC0NDARY

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1!'1!11, PR0POIEDROaC.ETTY 101llll.&TIY011ERS

680,400 NOTES:

--- 1. CONTRACTOR SHALL NOT ASCEND THE SHORELINE. ALL WORK SHALL BE DONE

FROM THE OPEN WATERS OF LAKE PONTCHARTRAIN. STUMPS A ND OTHER DEBRIS

WILL BE ENCOUNTERED.

2. A FLARE IN THE CHANNEL WILL BE CUT STARTING AT C/L STA. 34+71.54 AND ENDING

AT C /l STA . 42+69.74. THE FLARE HAS A MAXIMUM WIDTH OF 200 FEET AT THE LARGEST

PART.

3. TOPOGRAPHY SHOWN WAS PREPARED FROM BING MAPS 2026.

4. REQUIRED CHANNEL DIMENSIONS ARE 1 25 FOOT BOTTOM WIDTH, 1 H ON 2V SIDE

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THE SECONDARY DISPOSAL AREA IS TO BE USED ONCE THE PRIMARY AREA IS FILLED.

6 . DREDGE DISCHARGE LOCATION SHALL BE MOVED AS DISPOSAL BUILDS TO A N

ELEVATION OF (+)3.0 FEET NAVD88.

7. NO DIRECT DISCHARGE OUTSIDE DELINIATED DISPOSAL AREA (EXISTING MARSH).

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