310 260 105219
This is a T-Mobile small cell. There is one location for this eNB at Brown Bear Ln and Alsace Way (38.80138075983369, -104.83516413175268; Google Street View). IIRC, there is another location for same eNB on N Bear Paw Ln (38.80019903400341, -104.83946395231244), but I did not catch the exact location and do not see it on Google Street View.
There is T-Mobile small cell with same physical design nearby at Bradley Place and Pine Avenue. See 310_260_105218