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Page 1: 10,000 Years Agocoastal.la.gov/wp-content/uploads/2014/07/Cameron... · 10,000 Years Ago Literally, no salt water in sight LAST ICE AGE Cameron was more than 100 miles inland from
Page 2: 10,000 Years Agocoastal.la.gov/wp-content/uploads/2014/07/Cameron... · 10,000 Years Ago Literally, no salt water in sight LAST ICE AGE Cameron was more than 100 miles inland from
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10,000 Years Ago

Literally, no salt water in sight

LAST ICE AGE

Cameron was more than 100 miles inland from the coast

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Southwest Louisiana SHOWING BOTH SOLID LAND AND

MARSH

Southwest Louisiana SHOWING BOTH SOLID LAND AND

MARSH

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Southwest Louisiana SHOWING

SOLID LAND ONLY

Southwest Louisiana SHOWING

SOLID LAND ONLY

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Cameron Creole Watershed

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Watershed is lower than the lake

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WATER EVAPORATES Leaving salt behind

With no adequate freshwater source

(or too much flooding)

marsh becomes saltier and weak

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Intermediate/Brackish Marsh Desirable for the

fish, shrimp and crabs we have today

TOO SALTY

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General Gulf of Mexico Salinity 33 ppt

(parts per thousand)

North Calcasieu Lake

Readings as high as

29.0 ppt

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CYPRESS TREES

2 ppt

BRACKISH MARSH 8 ppt

SALTWATER MARSH 40 ppt

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CYPRESS TREES

2 ppt

BRACKISH MARSH 8 ppt

SALTWATER MARSH 40 ppt

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1874 80’ wide 5’ deep

Ship Channel first created in 1874

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1903 200’ wide 13’ deep

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Until 1910 Calcasieu Lake

was fresh enough to be used for rice irrigation

1903 200’ wide 13’ deep

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1941 250’ wide 30’ deep

Ship Channel completed from the Gulf to Lake Charles

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Levee first proposed

Geographer warned of area becoming future Lake Pontchartrain

Salt water control structure on the Calcasieu River 2 miles north of Lake Charles

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1968 400’ wide 40’ deep

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Levee first proposed

Construction of Levee begins

Construction of Weirs begins Resource Management Plan adopted Advisory Committee created

Weirs completed controlled operation begins

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By following the MANAGEMENT PLAN the marsh started to come back :

±82 acres GAINED per year through 2004

2005-2010 MANAGEMENT PLAN

was not followed ±362 acres LOST per year

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Peconi

Mangrove

Grand

Lambert No-Name

12

PPT

5

PPT

13 monitoring stations 6 of them “live”

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ADJUSTABLE CREST WEIR STRUCTURES

Peconi & Lambert

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ADJUSTABLE CREST WEIR STRUCTURES

Peconi & Lambert

GATE GATE GATE GATE

GATE GATE GATE GATE

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ADJUSTABLE CREST WEIR STRUCTURES

Peconi & Lambert

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ADJUSTABLE CREST WEIR STRUCTURES

Peconi & Lambert

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ADJUSTABLE CREST WEIR STRUCTURES

Peconi & Lambert

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No-Name and Mangrove are FIXED CREST Weirs

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FIXED CREST WEIR STRUCTURES

No-Name & Mangrove

FIXED-CREST SILL

GATE GATE GATE GATE

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FIXED CREST WEIR STRUCTURES

No-Name & Mangrove

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FIXED CREST WEIR STRUCTURES

No-Name

CREST ELEVATION LOW AT NO-NAME

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FIXED CREST WEIR STRUCTURES

Mangrove

CREST ELEVATION HIGH AT MANGROVE

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BOAT BAY at Grand Bayou

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