STREAM STABILITY STUDY FOR PIPELINES IN HIGH CONSEQUENCE AREAS

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STREAM STABILITY STUDY FOR PIPELINES IN HIGH
CONSEQUENCE AREAS

• By Larry Blair, PE
• Eastern Sandoval County Arroyo Flood Control
  Authority (ESCAFCA)
• Sandoval County, New Mexico
• November 5, 2010

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COLORADO
OK
ARIZONA
Placitas
TEXAS
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A Little History

• Sandia Mountains Rio Grande River Las Huertas
  Creek
• Village of Placitas
• Pipelines

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Purpose of Channel Stability Study

• Preserve the natural state of the arroyo
• Prevent potential problems with exposure of the
  pipeline

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Methodology

• Hydrologic Analysis 30 Years
• 2 Yr
• 5 Yr
• 10 Yr
• 25 Yr
• 50 Yr
• Plus 100 Yr Event
• Soils Analysis
• Predict Lateral and Vertical Movement

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Conclusions

• Standards may not be adequate
• Stream stability study may be a good tool

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