Spent a day with family on Lake Conroe in Montogomery County, Texas. Decided to measure the Harbour Town lighthouse on the lake. Tried, unsuccessfully, to drop the TB at a cache on the island in the middle of the lake. Ended up taking it back to Spring, Texas and dropping it in a large cache named Heron Park. About the lighthouse....It is 90 feet tall and the light is operational. It was originally constructed in 1977 but had to be rebuilt in 1999 after sustaining substantial damage due to a tornado. Happy travels!