Table 3. Data from Edwards Plateau, Hill Country, and Balcones Fault-zone Provinces, Texas, All Pipelines

A.  Area Pipeline Oil Spills--1971-1985:
 
Total spills
1,373
100.0%
Spills greater than 49 barrels
449
32.7%
Spills greater than 99 barrels
292
32.7%
Spills greater than 199 barrels
166
12.1%
Spills greater than 499 barrels
67
4.9%
Spills greater than 999 barrels
32
2.3%
Mean spill = 181.3 barrels
Median spill = 31.5 barrels
 

B. Area Pipeline System (1985):
 
Crude Oil trunck lines 2,653 miles
Gathering lines (estimate) 990 miles
Product lines 224 miles
Total 3,867 miles
 
 

C. Average Annual Spill-rate For Period 1971-1985:
 

All spills one spill per 42.2 line-miles per year
Spills greater than 49 barrels one spill per 129.2 line-miles per year
Spills greater than 99 barrels one spill per 198.6 line-miles per year
Spills greater than 199 barrels one spill per 349.4 line-miles per year
Spills greater than 499 barrels one spill per 865.7 line-miles per year
Spills greater than 99 barrels one spill per 1,812.7 line-miles per year