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The failure of the crossties to meet any of the three above criteria constitutes a deviation from the TSS.

Effective distribution has not been defined, but must not be interpreted by the inspector as synonymous with equally spaced.

These types of crossties are becoming more common throughout the industry.

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Inspectors should consider the overall condition of a track when citing fouled ballast.

Because ballast conditions can be subjective in nature, inspectors should also look to other indicators, such as a geometry condition.

Inspectors should be aware that failure modes are not isolated to crosstie defects.

Combinations of compliant but irregular track and rail geometry, poor drainage, insufficient ballast depth and subgrade soil conditions may contribute to failure or root causal factors.

Proper drainage that is free from the presence of excess moisture is an apparent and crucial factor in providing added structural support.

Section 213.109 contains specific performance requirements for FRA Classes 1 through 5 track that address the unique characteristics of fastener reliability, concrete crossties, and roadbed stability.

For example, a fouled ballast violation might be appropriate if the track has poor drainage and there is a geometry condition or a series of fouled ballast locations with geometry conditions.

The term "geometry condition" used here and elsewhere in this manual means a track surface, gage, or alinement irregularity that does not exceed the allowable threshold for the designated track class.

If geometry measurements exceed the allowable tolerance, but a determination cannot be made that crossties are the cause, it is appropriate to cite only the defective geometry.

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