Dictionary Definition

logjam

1 any stoppage attributable to unusual activity; "the legislation ran into a logjam"

2 an immovable mass of logs blocking a river

User Contributed Dictionary

From log + jam.

A clog or such jam or mess that halts or greatly delays progress.

Efforts to amend the law got sidetracked in an administrative logjam.
A step forward for the minimum wage increase this afternoon, as the Senate cleared the logjam of the Republican filibuster. http://www.dailykos.com/storyonly/2007/1/30/13150/5672
In the context of "lumber industry": An excess of logs being conveyed on a river, so that their motion halts.

An excess of logs being conveyed on a river

Spanish: aglomeración de troncos atascados en un río, lío de troncos flotante que causa obstrucción

A clog; any jam or mess that halts or greatly delays progress

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