In case you are wondering if you will be able to see the proposed Heber Temple, you likely will.
The proposed Temple is expected to be a total overall height of 190 Ft with the potential for another 20-30 Ft of increased elevation due to water table issues. The main building is expected to be 82 Ft in height.
The figure below is a Line of Sight map created with CALTOPO. You will see a blue dot in the middle representing the proposed Temple location. The shaded areas represent the Line of Sight Exposure to the Temple set at the height of 22 (72.2 Ft), 30 (98.4 Ft) and 60 (196.8 Ft) meters. As you can see, there is not much change with the varied heights. At this time, we have not included the additional 20-30 Ft that the Temple would have to be elevated due to water table concerns.
This is only Line of Sight, no illumination or brightness is modeled. If you are within the shaded area not only will you see the Temple in your night time view but also in your daylight view including the main structure and the spires.
Line of Sight is relevant. The depiction below is from the International Dark Sky Association website. It shows how down lighting impacts its surroundings. Even with down lighting, the Line of Sight highlighted area will be impacted.
The current Wasatch County Exterior Lighting Code prohibits uplighting by requiring a 90 degree full cutoff shield or luminary on lights. This ensures all light rays emitted from a fixture are below a horizontal plane and is compatible with the International Dark Skies Seal of Approval, which requires:
"A fixture must be fully shielded and emit no light above the horizontal plane. There shall be no sag or drop lenses, sidelight panels, uplight panels, etc. Approved fixtures shall employ warm-toned (3000K and lower) white light sources or may employ amber light sources or filtered LED light sources."
The Core Architecture request (related to the proposed Temple) and now the County's proposal to amend the Dark Sky ordinance for Wasatch County will allow uplighting with even greater intensity. This will result in significant light pollution in the shaded area skies. The picture below also from the International Dark Sky Association, originally intended to show the improvement that could be made instituting Dark Sky requirements, would be the opposite for us if we allow the county to reserve or relax our Dark Sky ordinance.
As neighbors we need to respect each other's rights and hope to preserve our county's rural nature and dark skies.
Save Wasatch Back Dark Skies Team