| 词条 | North Fork Dam (Clackamas County, Oregon) |
| 释义 |
| name = North Fork Dam | name_official = | image = | image_size = | image_caption = | image_alt = | location_map = Oregon | location_map_size = | location_map_caption = | location_map_alt = | coordinates = {{coord|45|14|36|N|122|16|47|W|display=inline,title}} | country = United States | location = Clackamas, Oregon | purpose = | status = | construction_began = | opening = | demolished = | cost = | builder = | owner = | operator = | dam_type = | dam_crosses = | dam_height_foundation = | dam_height_thalweg = | dam_length = | dam_elevation_crest = | dam_width_crest = | dam_width_base = | dam_volume = | spillway_count = | spillway_type = | spillway_capacity = | res_name = | res_capacity_total = | res_capacity_active = | res_capacity_inactive = | res_catchment = | res_surface = | res_max_length = | res_max_width = | res_max_depth = | res_elevation = | res_tidal_range = | lower_dam_type = | lower_dam_crosses = | lower_dam_height_foundation = | lower_dam_height_thalweg = | lower_dam_length = | lower_dam_elevation_crest = | lower_dam_width_crest = | lower_dam_width_base = | lower_dam_volume = | lower_spillway_count = | lower_spillway_type = | lower_spillway_capacity = | lower_res_name = | lower_res_capacity_total = | lower_res_capacity_active = | lower_res_capacity_inactive = | lower_res_catchment = | lower_res_surface = | lower_res_max_length = | lower_res_max_width = | lower_res_max_depth = | lower_res_elevation = | lower_res_tidal_range = | plant_name = | plant_coordinates = | plant_operator = | plant_commission = | plant_decommission = | plant_type = | plant_hydraulic_head = | plant_turbines = | plant_pumpgenerators = | plant_pumps = | plant_capacity = | plant_capacity_factor = | plant_efficiency = | plant_storage_hours = | plant_annual_gen = | plant_annual_gen_year = | website = | extra = }} The North Fork Dam is on the Clackamas River, about five miles upriver from Estacada, Oregon.[1] It was built in 1958.[1] The North Fork Reservoir is behind it. ConstructionIt is a concrete arched dam, 206 feet high and 676 feet long,[1] is thin-shell of variable thickness. It varies in thickness from 32 feet at the base to 8 feet wide at the top.[1] The fish ladderNorth Fork's construction entailed the building of the 1.9-mile-long North Fork Fish Ladder, one of the longest in the world.[2] It also required a complex system to provide for downstream fish passage around the dam. References1. ^1 2 3 {{cite web|url=http://www.oregonencyclopedia.org/articles/north_fork_dam_and_powerhouse/|title=North Fork Dam and Powerhouse|publisher=The Oregon Encyclopedia|accessdate=3 January 2016}} 2. ^{{cite web|url=http://www.oregonencyclopedia.org/articles/north_fork_fish_ladder/|title=North Fork Fish Ladder|publisher=The Oregon Encyclopedia|accessdate=3 January 2016}} External links
2 : Dams in Oregon|1958 establishments in Oregon |
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