From: Mark Brest van Kempen <>
To: jun <>
Date: Wed, 16 Feb 2005 09:50:53
Subject: Silty Creek 2/15
CC: <>, <>, <>, <>, <>, <>, <>, <>, <>, <>, <>, <>, <>, <>, <>, <>, <>, <>, <>

For the record I just wanted to update everyone on the condition of Chimes Creek during this last storm. Yesterday morning until about 8am the Creek had been normal volume and turbidity for this much rain. The Creek went suddenly extremely silty between 8:00am and 9:00am. There was very little water coming down the Mountain Blvd storm drain from Rifle and it was very clean.

I left a message for you at about 10am which you didn't receive, but when I called again later you responded in your usual prompt manner. By then the Creek's turbidity had subsided but it was still raining and it gave me an opportunity to show you what the Creek should look like during a rainstorm.

I have no problem with the normal increased turbidity associated with rainstorms and will not bother you with complaints unless the turbidity seems unusually high, which it did yesterday morning.

I also wanted to mention that the turbidity in the Creek seemed high again this morning (perhaps due to some work by EBMUD at the site?)

Yesterday's episode reminds me very much of what was happening during Apriland May when grading was contaminating water in the subdrain system and that was apparently very hard to discover. (I believe that was what was happening). Is it possible that a similar scenario is occurring in the upper bowl?

I very much appreciate you investigating these incidents of turbidity from the quarry.


Mark Brest van Kempen
3835 Delmont Ave
Oakland CA 94605
510 568 6889