This small 'creek' is pretty unimpressive here, but a half mile north it turns into quite the canyon, and just a bit farther north empties into the Walnut River. The canyon is lovingly *cough* refered to by some as "Copperhead Canyon" because of some of the inhabitants.
This is a small container at one of the small 'bridges' on this street. Surprisingly a lot of traffic on this road, so some stealth is required. I would suggest parking nearby and a quick walk to GZ - possibly park and walk to both this and the other nearby.