Table:
text: List of dams and reservoirs in Alaska
List
List
Name_A_ Dam_or_A_Reservoir GNIS_Feature_ID_Link_A_B_ Elevation_A_ Borough_or_A_Census_area
Seldovia Upper Dam Dam 1417209 feet (m) Kenai Peninsula
Sheldon Jackson College Dam Dam 1417369 feet (m) Sitka
Sherwood Estates Dam Dam 1417270 feet (m) Matanuska-Susitna
Ship Creek Dam Dam 1417230 feet (m) Anchorage
Ship Creek Reservoir Reservoir 1417231 feet (m) Anchorage
Shotter Creek Dam Dam 1417225 feet (m) Hoonah-Angoon (CA)
Lower Silvis Lake Reservoir 1423451 feet (m) Ketchikan Gateway
Lower Silvis Lake Dam Dam 1417180 feet (m) Ketchikan Gateway
Upper Silvis Lake Reservoir 1415517 feet (m) Ketchikan Gateway
Upper Silvis Lake Dam Dam 1417178 feet (m) Ketchikan Gateway
Site Lake Reservoir 1417226 feet (m) Hoonah-Angoon (CA)
Sixmile Lake Reservoir 1419252 feet (m) Anchorage

Question: What is the dam or reservoir [›] if the gnis feature id # link a [›] b [›] is 1415517 in the list of dams and reservoirs in Alaska?