Little Patuxent River

Little Patuxent River
Name	Little Patuxent River
Country	United States
State	Maryland
Region	Howard County; Anne Arundel County; Prince George's County; Baltimore County
Length	39.4 km (24.5 mi)
Source	Columbia, Maryland area
Source location	Columbia, Maryland
Mouth	Patuxent River
Mouth location	Patuxent River
Basin size	~ 105 sq mi

Little Patuxent River The Little Patuxent River is a tributary of the Patuxent River in central Maryland, flowing through suburban and semi-rural portions of Howard County, Maryland, Anne Arundel County, Maryland, and Prince George's County, Maryland before joining the Patuxent. The stream system links landscapes associated with Columbia, Maryland, Ellicott City, Maryland, Laurel, Maryland, and Jessup, Maryland, and lies within a watershed shaped by the history of Baltimore, the development of Washington, D.C., and regional transportation corridors such as Interstate 95.

Course

The river originates near Columbia, Maryland in central Howard County, Maryland and flows generally southeast, passing near Elkridge, Maryland, Ellicott City, Maryland, and Jessup, Maryland before entering the Patuxent River near Laurel, Maryland. Along its course the Little Patuxent is joined by tributaries including Galloway Branch, Hawlings River (via connected basins), and smaller streams that drain suburban neighborhoods developed as part of Rouse Company planning and expansions tied to Howard Research and Development projects. The channel crosses beneath major rights-of-way such as U.S. Route 1, Interstate 95, and the Baltimore–Washington Parkway, linking hydrology to regional infrastructure shaped by agencies like the Maryland Department of Transportation and historical roads connected to Baltimore and Annapolis, Maryland.

Watershed and Hydrology

The Little Patuxent watershed covers roughly 105 square miles and includes portions of Howard County, Maryland, Anne Arundel County, Maryland, and Prince George's County, Maryland. Land use in the basin reflects suburban developments tied to Columbia, commercial nodes near Arundel Mills, and remnants of agricultural parcels historically associated with Howard County farmsteads and estates such as those documented in Maryland Historical Trust records. Hydrologic patterns are influenced by regional precipitation regimes monitored by the National Weather Service and streamflow gauging historically coordinated with the United States Geological Survey. Stormwater from developments connected to projects by The Rouse Company and transportation runoff from corridors like Interstate 95 affect peak flows, baseflow, and sediment transport, which are topics of study by institutions including University of Maryland, College Park and the Chesapeake Bay Program.

Ecology and Wildlife

The riparian corridors and floodplain wetlands along the Little Patuxent host habitats used by species recorded in state inventories by the Maryland Department of Natural Resources, including songbirds monitored by Audubon Maryland-DC, amphibians surveyed by the Maryland Amphibian and Reptile Atlas Project, and fish communities cataloged by the Potomac River Fisheries Commission and regional field stations of Smithsonian Environmental Research Center. Vegetation assemblages include remnant tidal marsh plants where influences of the Patuxent River extend upstream, and upland forests with tree species referenced in studies at Brookside Gardens and the USDA Forest Service. Conservation groups such as the Chesapeake Bay Foundation and local watershed alliances have documented populations of migratory birds using the corridor in association with flyways tied to the Atlantic Flyway.

History and Human Use

Human presence in the Little Patuxent basin predates European colonization, with archeological and tribal histories connected to the Piscataway people and neighboring indigenous groups documented in Maryland Historical Trust archives. During colonial and antebellum periods, the basin contained plantations and mills connected to broader economic networks of Baltimore and Annapolis, Maryland, with landowners recorded in county deeds held at Howard County Historical Society and parcels associated with families appearing in records of Anne Arundel County. Industrial and transportation developments—such as early rail lines tied to the Baltimore and Ohio Railroad and later suburbanization driven by projects of The Rouse Company—transformed the landscape. Municipal water supply planning and wastewater infrastructure for communities like Laurel, Maryland and Columbia, Maryland engaged utilities such as the Washington Suburban Sanitary Commission and county public works departments.

Environmental Issues and Restoration

The Little Patuxent has been subject to environmental stressors documented by the Chesapeake Bay Program, including elevated nutrient loads, sedimentation, and contaminants associated with urban runoff from corridors near Interstate 95 and U.S. Route 1. Historical industrial sites and legacy pesticides investigated by the Environmental Protection Agency and state agencies have prompted remediation projects in coordination with Maryland Department of the Environment and local governments. Restoration initiatives feature stream restoration and riparian buffer plantings funded or supported by the Chesapeake Bay Trust, National Fish and Wildlife Foundation, and municipal grant programs, while academic research from University of Maryland Center for Environmental Science contributes monitoring data. Community-based watershed groups and nonprofit organizations such as the Howard County Conservancy and county watershed alliances implement volunteer-based monitoring, invasive species removal modeled after protocols used by Maryland Invasive Species Council, and green infrastructure projects informed by guidelines from the U.S. Environmental Protection Agency.

Recreation and Access

Public access points and trails within the Little Patuxent basin include municipal parks, preserved open spaces managed by Howard County Department of Recreation and Parks, and trail segments connecting to regional networks like the Patuxent Branch Trail and greenways linked to Baltimore-Washington Parkway corridors. Kayaking and canoeing occur on navigable stretches near the confluence with the Patuxent River and are described in guide materials from outdoor organizations such as American Canoe Association affiliates and local paddling clubs. Birdwatching and nature education programs presented by institutions like the Howard County Conservancy and interpretive centers administered by Maryland Park Service encourage stewardship consistent with regional conservation outreach promoted by the National Fish and Wildlife Foundation and Chesapeake Bay Foundation.

Category:Rivers of Maryland Category:Tributaries of the Patuxent River