STREAM STABILITY STUDY FOR PIPELINES IN HIGH CONSEQUENCE AREAS By: Larry Blair, PE Eastern Sandoval County Arroyo Flood Control Authority (ESCAFCA) Sandoval.

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Presentation transcript:

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

ARIZONA TEXAS OK COLORADO Placitas

A Little History Sandia Mountains; Rio Grande River; Las Huertas Creek Village of Placitas Pipelines

Purpose of Channel Stability Study Preserve the natural state of the arroyo Prevent potential problems with exposure of the pipeline

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

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