{"nrhp_refnum":"66000205","name":"Lake Merritt Wild Duck Refuge","other_names":[],"category":"site","location":{"address":"Lakeside Park, Grand Ave.","address_restricted":false,"city":"Oakland","county":"Alameda County","state":"CA","lat":37.80467524400004,"lon":-122.25622585267817,"geom_source":"nps_gis"},"listed_date":"1966-10-15","is_nhl":true,"nhl_designated_date":"1963-05-23","areas_of_significance":["Conservation"],"significance_levels":["national"],"summary":{"what_it_is":"A 160-acre tidal lake and wildfowl sanctuary in the center of downtown Oakland, Alameda County, California, owned by the City of Oakland and encircled by a paved sidewalk, parkways and boulevards.","why_significant":"The nomination calls Lake Merritt the oldest legally established wildlife refuge in the country, created by a bill that became law on March 18, 1870. It is described as a pioneer conservation effort and a wintering ground for thousands of waterfowl, set within a city's business district. It is also a popular place for people to watch the birds.","narrative":"Lake Merritt is a 160-acre salt-water lake in the middle of downtown Oakland, California, an arm of the bay cut off by a causeway and movable dam. Parkways and boulevards circle it, lined with homes and public buildings, and a necklace of lights reflects in the water at night. Boaters use the lake, and the city of Oakland owns and maintains it. The site is recognized as the oldest legally established wildlife refuge in the United States. A bill introduced by Senator Edward Thompkins in the 1869-1870 legislature became law on March 18, 1870. Samuel Merritt had bought the former slough in 1852 and helped form the lake. Thousands of waterfowl winter here, mainly pintails and canvasbacks, along with baldpates, shovellers and other species. Birds descend among office and apartment buildings, and crowds gather to watch them. In 1929 a rare European widgeon was caught in a banding trap on the lake.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Described as in excellent condition, on its original site, publicly owned, a park open to the public without restriction, and supported and maintained by the city of Oakland.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:31.852352-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/66000205_NHL.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/66000205/ddc5ed4325-800.webp","url_1600":"https://nationalhistoricalregister.com/media/66000205/ddc5ed4325-1600.webp","licence":"Public domain","author":"Dcoetzee","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Closeup_aerial_view_of_Downtown_Oakland_and_Lakeside_Park.jpg\" rel=\"noopener\">Dcoetzee</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Closeup_aerial_view_of_Downtown_Oakland_and_Lakeside_Park.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123857881","wikipedia":"https://en.wikipedia.org/wiki/Lake_Merritt","wikidata":"https://www.wikidata.org/wiki/Q3623431"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/alameda-county/lake-merritt-wild-duck-refuge-66000205/"}