|
Project and/or Source
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Date of Construction and Type of Coating
|
Pipe Diameter
|
Pipe Length
|
Route Corrosivity
|
Notes (Any Problems or Corrosion Activity Reported)
|
|
Bureau of Reclamation Technical Memorandum 8140-CC-2004-1a
|
1960s to present
|
Varies
|
320 miles
|
Varies
|
No external corrosion leaks reported through 2008.
|
|
Southwest Pipeline Project, N.Dak.; Bureau
|
1983-1992 Tape
|
Varies; assume 24- to 36-inch
|
43 miles
|
Severely corrosive below 2,000 ohm-cm
|
No external corrosion leaks reported through 2008.
|
|
Mid-Dakota Rural Water System, Miller, S.Dak.; Bureau
|
1996 to 2002
|
Varies; assume 24-to 30-inch
|
25.4 miles
|
Severely corrosive
|
No external corrosion leaks reported through 2008.
|
|
Mni Wiconi, Pierre, S.Dak.; Bureau
|
1993 to 2007 Polyurethane
|
Varies; 24- to 30-inch
|
100 miles
|
Below 2,000 ohm-cm
|
No external corrosion leaks reported through 2008.
|
|
Lewis and Clark, Sioux Falls, South Dakota; Bureau
|
2003 to present
|
Varies; 24- to 54-inch
|
78.5 miles
|
Below 2,000 ohm-cm
|
No external corrosion leaks reported through 2008.
|
|
East Bay Municipal Utility District, Calif.
|
1920s, Aqueduct No. 1
|
65-inch riveted steel
|
90 miles
|
Varies
|
Leaks. Stopped after adequate cathodic protection (CP) levels were restored; no external corrosion leaks reported through 2008.
|
|
Cheyenne, Wyo.
|
1964, Stage 1 Coal tar enamel
|
26-inch
|
40 miles
|
Portions less than 1,000 ohm-cm
|
In 1987, 23 leaks on Stage I pipeline. After joint bonding and CP improvements were made and adequate CP levels were restored in 1990, no external corrosion leaks were reported between 1990 and 2008.
|
|
Shoshone Pipeline, Cody, Wyo.
|
1988-1990 Tape
|
24- to 36-inch
|
50 miles
|
Portions less than 1,000 ohm-cm
|
No external corrosion leaks reported through 2008.
|
|
aBureau of Reclamation, U.S. Department of the Interior, Technical Memorandum 8140-CC-2004-1, “Corrosion Considerations for Buried Metallic Water Pipe,” Washington, D.C., July 2004.
|
