OA_Babbit_Picture.PPTX

Notes Omaha District Operational Status – MAR 2019

2/2 Garrison

U2 Wicket Gate Alignment Fort Peck

4/5

Oahe 8/8

Big Bend

6/8 U1 Cbl (19 Mar); U7 New Supports (7 Jun) Fort Randall Hydropower

Number of Units

Gavins Point

1/3

14/14 21/21 8/8

8/8

28/28

16/16

General Notes/Issues:

All other Flood control dams fully operational

Unit Available Scheduled Outage

Forced Outage Unclassified

FOUO

6/7 5/5

Spillway Data Fort Peck Fort Peck Garrison Garrison Oahe Oahe Big Bend Fort Randall Fort Randall Gavins Point

3/3 6/6 4/4

# In Service # Gates In Service # Tunnels In Service All Gates Available All Gates Available All Gates Available All Gates Available Gates Avail but Contractor Mobilized On-Site for Expansion Joint All Gates Available Ring gate limits 3000 cfs / tunnel All tunnels available All tunnels available

Flood Tunnels All Units Available

All Units Available Oahe Unit 6 Bearing Issues U6 Maintenance, Bearing Coolers & Babbit Issues U3 Dig Gov (25 Feb–19 Apr); U1 480V Swgr 11-21 Mar

During Oahe’s Unit 6 maintenance outage, the mechanics identified bearing damage on the trailing edge on 9 of the 14 bearing shoes. Tech support branch is preparing a contract to pour new babbit material. The Oahe units have had a history of runner split line gaps, cooler leaks, high pressure lift failures, and exciter stray currents; all of which could cause bearing issues.

All tunnels available image8.png image9.png image10.png image1.png image2.png image3.png image4.png image5.png image6.jpeg image7.png