Hayes Creek is a small

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

San Francisco, California San Francisco (; Spanish for " Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the fourth most populous in California and 17th ...

, that has been largely

culvert A culvert is a structure that channels water past an obstacle or to a subterranean waterway. Typically embedded so as to be surrounded by soil, a culvert may be made from a pipe, reinforced concrete or other material. In the United Kingdom ...

ed. The only remaining portion above ground is in the Mission Creek Channel that drains into

China Basin San Francisco, in the US state of California, has both major, well-known neighborhoods and districts as well as smaller, specific subsections and developments. While there is considerable fluidity among the sources, one guidebook identifies five m ...

.Museum of California
Watershed map, access date December 31, 2008

Notes

Rivers of San Francisco Subterranean rivers of the United States Rivers of Northern California Tributaries of San Francisco Bay {{California-river-stub