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Colorado TL1 and TL2

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Iowa 

• Eljen Iowa Sand Filter 

• Iowa Design Manual 

Kansas

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• General Approval Letter 
• Remeadial Approval Letter 

Michigan

Minnesota B B-2 Mound Type-1

Missouri

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Wisconsin  Manuals 

• In-Ground Beds 
• Mound 
• Mound In a Box

Wisconsin Crew Files

• Download Crew Files here