My daughter's sed rate was 79 when she was diagnosed last December, and it stayed that high for several months. It's now dropped down into the 20's, and we're thrilled to see it that low. That said, she's not in remission yet, so I guess I'm in agreement with what others have said--it's probably worth continuing to investigate to see if your daughter has some hidden source of inflammation.
Five years ago, when my daughter was 7, we took her into the doctor for hip pain, and she had a slightly elevated sed rate--I can't remember the exact value. The hip pain gradually decreased, and we all just assumed that the elevated sed rate was not related--that she was fighting some mild infection. Now we know it was probably Crohn's related, and wish that we had pushed for more follow up. Hindsight is 20/20 of course.