Lichau Creek is an U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data
The National Map
, accessed March 9, 2011 southwest-flowing

stream A stream is a continuous body of water, body of surface water Current (stream), flowing within the stream bed, bed and bank (geography), banks of a channel (geography), channel. Depending on its location or certain characteristics, a strea ...

Sonoma County, California Sonoma County ( ) is a county located in the U.S. state of California. As of the 2020 United States census, its population was 488,863. Its seat of government and largest city is Santa Rosa. Sonoma County comprises the Santa Rosa-Petaluma ...

, United States, which flows through the town of Penngrove and discharges into the

Petaluma River The Petaluma River is a river in the California counties of Sonoma and Marin that becomes a tidal slough for most of its length. The headwaters are in the area southwest of Cotati. The flow is generally southward through Petaluma's old town, ...

. The original name of the creek is O'Hara Creek and is named after the settler, John O'Hara, who purchased and owned the land through which the creek flows. O'Hara was born in 1833 in

County Sligo County Sligo ( , ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Northern and Western Region and is part of the Provinces of Ireland, province of Connacht. Sligo is the administrative capital and largest town in ...

, Ireland and settled in Penngrove sometime between 1852 and 1857 and died in 1911 at the age of 78 years. The October 26, 1904, ''Santa Rosa Republican'' refers to this creek as O'Hara Creek.

Course

The creek springs from the western side of

Sonoma Mountain Sonoma Mountain ( Coast Miwok: ''Oona-pa'is'') is a prominent landform within the Sonoma Mountains of southern Sonoma County, California. At an elevation of , Sonoma Mountain offers expansive views of the Pacific Ocean to the west and the Sono ...

between Copeland Creek and

Lynch Creek Lynch Creek is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed March 9, 2011 stream in Sonoma County, California, United States which discharges into the Petaluma River. Course Lynch ...

. Descending initially to the west, it crosses under Sonoma Mountain Road and passes north of Stony Butte. After crossing East Railroad Avenue and Petaluma Hill Road, it flows under the

Northwestern Pacific Railroad The Northwestern Pacific Railroad is a mainline railroad from the former ferry connections in Sausalito, California north to Eureka, with a connection to the national railroad system at Schellville. The railroad has gone through a complex h ...

tracks. It immediately bends southward and parallels the tracks through Penngrove, crossing Adobe Road and Main Street. On the northern outskirts of

Petaluma Petaluma is a city in Sonoma County, California, United States, located in the North Bay region of the San Francisco Bay Area. Its population was 59,776 according to the 2020 census. Petaluma's name comes from the Miwok village named ''Péta ...

, it crosses Ely Road and turns southwestward, crossing Old Redwood Highway, the North McDowell Boulevard Extension,

U.S. 101 U.S. Route 101, or U.S. Highway 101 (US 101), is a major north–south highway that traverses the states of California, Oregon, and Washington on the West Coast of the United States. It is part of the United States Numbered Highway Syst ...

, and Stony Point Road to reach the Petaluma River.

Flora and fauna

A 1968 survey of Lichau Creek found

algae Algae ( , ; : alga ) is an informal term for any organisms of a large and diverse group of photosynthesis, photosynthetic organisms that are not plants, and includes species from multiple distinct clades. Such organisms range from unicellular ...

duckweed Lemnoideae is a subfamily of flowering aquatic plants, known as duckweeds, water lentils, or water lenses. They float on or just beneath the surface of still or slow-moving bodies of fresh water and wetlands. Also known as bayroot, they arose fr ...

cattails ''Typha'' is a genus of about 30 species of monocotyledonous flowering plants in the family Typhaceae. These plants have a variety of common names, in British English as bulrushStreeter D, Hart-Davies C, Hardcastle A, Cole F, Harper L. 2009. ...

dragonflies A dragonfly is a flying insect belonging to the infraorder Anisoptera below the order Odonata. About 3,000 extant species of dragonflies are known. Most are tropical, with fewer species in temperate regions. Loss of wetland habitat threate ...

, dipterous insects,

caddisflies The caddisflies (order Trichoptera) are a group of insects with aquatic larvae and terrestrial adults. There are approximately 14,500 described species, most of which can be divided into the suborders Integripalpia and Annulipalpia on the basis ...

frog A frog is any member of a diverse and largely semiaquatic group of short-bodied, tailless amphibian vertebrates composing the order (biology), order Anura (coming from the Ancient Greek , literally 'without tail'). Frog species with rough ski ...

steelhead trout Steelhead, or occasionally steelhead trout, is the anadromous form of the coastal rainbow trout or Columbia River redband trout (''O. m. gairdneri'', also called redband steelhead). Steelhead are native to cold-water tributaries of the Pacif ...

, and

stickleback The sticklebacks are a family of ray-finned fishes, the Gasterosteidae which have a Holarctic distribution in fresh, brackish and marine waters. They were thought to be related to the pipefish and seahorses but are now thought to be more close ...

s living in the creek.

Bridges

At least three bridges span the creek: * Petaluma Hill Road crosses north of Old Redwood Highway on a concrete continuous

tee beam A T-beam (or tee beam), used in construction, is a load-bearing structure of reinforced concrete, wood or metal, with a capital 'T'-shaped cross section. The top of the T-shaped cross section serves as a flange or compression member in resisti ...

built in 1920 and reconstructed in 1976. * East Railroad Avenue crosses east of Petaluma Hill Road on a concrete culvert built in 1970. * Adobe Road crosses east of Old Redwood Highway on a concrete tee beam built in 1929.

References

External links

{{San Francisco Bay watershed Rivers of Sonoma County, California Sonoma Mountains Tributaries of the Petaluma River Rivers of Northern California

Course

Flora and fauna

Bridges

See also

References

External links