CORPS OF ENGINEERS
                                  LITTLE ROCK DISTRICT
 
                        DISSOLVED OXYGEN AND TEMPERATURE REPORT
 
                                   TUESDAY   23 AUG 2011
                ______________________________________________________________
               |                    |                    |                    |
               |  BEAVER            |  TABLE ROCK        |  GREERS FERRY      |
               |  (tailwater)       |  (tailwater)       |  (tailwater)       |
               |____________________|____________________|_____________ ______|
               | D.O. | TEMP | REL  | D.O. | TEMP | REL  | D.O. | TEMP | REL  |
               |------|------|------|------|------|------|------|------|------|
               | mg/l |deg F | cfs  | mg/l |deg F | cfs  | mg/l | deg F| cfs  |
               |--------------------|-------------|------|--------------------|
     22AUG 0600|  6.5 | 52.1 |    20|  2.1 | 56.2 |    20|  6.9 | 54.3 |    20|
     22AUG 1200| 11.0 | 54.3 |    20|  4.4 | 57.1 |   175|  7.7 | 57.6 |    20|
     22AUG 1800|  6.5 | 53.6 |  7635|  5.2 | 56.7 |  5021|  6.3 | 55.0 |  6788|
     22AUG 2400|  6.5 | 52.3 |    20|  4.2 | 56.5 |    20|  6.8 | 55.0 |    20|
     23AUG 0600|  6.4 | 52.2 |    20|  2.3 | 56.3 |    20|  6.4 | 54.5 |    20|
               |      |      |      |      |      |      |      |      |      |
         MAX   | 11.0 | 54.5 |      |  6.8 | 57.1 |      |  7.7 | 58.6 |      |
          time | 1200 | 1500 |      | 1300 | 1200 |      | 1100 | 1300 |      |
          date |22AUG |22AUG |      |22AUG |22AUG |      |22AUG |22AUG |      |
  release @ max|    20|   148|      |  2595|   175|      |    20|    20|      |
               |      |      |      |      |      |      |      |      |      |
         MIN   |  6.3 | 52.0 |      |  2.1 | 56.2 |      |  6.2 | 54.3 |      |
          time | 1700 | 0700 |      | 0600 | 0600 |      | 0300 | 0600 |      |
          date |22AUG |22AUG |      |22AUG |22AUG |      |23AUG |22AUG |      |
  release @ min|  7624|    20|      |    20|    20|      |    20|    20|      |
  _____________|______|______|______|______|______|______|______|______|______|
 
  LAKE PROFILES
 
        BEAVER 12JUL11          TABLE ROCK 14JUL11        GREERS FERRY 12JUL11
         elev = 1126.64            elev = 919.72             elev = 472.49
      DEPTH  D.O.   TEMP        DEPTH  D.O.   TEMP        DEPTH  D.O.   TEMP
      feet   mg/l   deg F       feet   mg/l   deg F       feet   mg/l   deg F
      -----  -----  -----       -----  -----  -----       -----  -----  -----
        1.0  12.09  87.80         0.4   9.79  86.22         0.3   8.17  89.22
       17.1   9.54  85.55        10.5   9.28  85.57        14.0   8.43  86.70
       20.1   9.34  81.23<       15.3   6.95  83.71<       16.0   9.07  84.70<
       27.1   5.55  68.59        20.5   0.27  76.50        28.1   8.31  75.16
       30.0   5.49  65.64<       27.4   0.05  68.02<       31.2   5.99  70.32<
       35.0   4.33  63.70        33.3   0.06  64.56        37.1   4.38  65.62
       55.9   6.38  59.43        60.1   3.69  59.97        70.3   6.50  57.87
       90.1   7.83  56.77       100.1   4.23  57.18        90.0   7.10  55.81
      127.1   7.81  52.16       120.4   4.93  56.10       110.0   7.74  53.06
      136.1   7.51  49.73*      140.3   5.17  55.35*      130.1   7.86  49.35*
      159.8   6.04  46.15       160.1   4.01  54.12       150.2   6.83  46.90
      188.2   5.36  45.10       178.5   0.20  51.87       163.3   4.52  46.31
 
 
      I.D.O. =  7.07 mg/l       I.D.O. =  4.52 mg/l        I.D.O. =  7.38 mg/l
 
      < = Approximate range of thermocline
      * = Approximate centerline of penstock
 
  _____________________________________________________________________________
 
  REMARKS
 
  Table Rock recommended max generation rate is 168 Mw (84% nameplate).
  Greers Ferry vents blocked open 01 August; Beaver vents opened 19 August.
  Loads should be spread evenly across all available units at each project.