In 1878 a map showed a small stream here. The name appears on the Record of Surveys, page 103, on a plat prepared for a 1773 suit. Two tribuataries of the Bridge Branch were also mentioned: Darneds Spring Branch and Thrifts Spring Branch.

Almost one hundred years later, the construction of several large transportation projects enlarged and lengthened this stream.

Although the stream is longer, it is less of a stream and more of a drainage ditch. When Virginia built Interstate 66, they extended the channel toward Route 7 at Idylwood Road. Then, in rapid succession, WMATA built the West Falls Church metro station and the maintenance yard on Idylwood Road. Finally, they constructed the extension to the Dulles Toll Road. All of these projects directed excess storm water into this stream, which carried the water to Pimmit Run. This stream/ditch joins Pimmit Run just north of Great Falls Road.

Burke's Spring Branch joins Pimmit Run near the little league fields. Its watershed includes two large parks: Kirby and Longfellow. Together with some large school yards and church properties, these parks help purify the water in this stream.

It has a year-round flow.

This stream was called Cockerill's Spring Branch until Burke bought Cockerill's house in 1837. The house still stands today.

Saucy Branch flows past McLean High School and through the Bryn Mawr neighborhood.

In the late 18th-Century one person owned almost all of this stream. His parcel of land was 198-acres. It became the subject of a law-suit for trespass, possibly for felling timber on the land. In the court records, the survey of the property states, "The name given to the tributary [of Pimmit Run] is Saucy Branch, which traverses this tract." Thanks to John Weiler for this information

This branch flows into Pimmit Run just south of Old Dominion Drive. Pimmit Run Trail crosses it on a fair-weather crossing

Bryan Branch is less than a mile long. It joins Pimmit Run near the Highland Swim Club and Pimmit Bend Park. Its source is south of Old Chesterbrook Road. From the source it flows only intermittently until it crosses under Old Dominion Drive.

North of Old Dominion Drive, it has a year-round flow. Here a long, narrow park protects its banks. There is evidence of erosion. A citizen monitored this stream for a while.

Although it is small, it drains an area rich in history: Saint John's Church is in its watershed. In present-day Chesterbrook, formerly Lincolnville, freed blacks gailned title to lands by purchase from the Crocker family, who were Unionists. The area of black settlement was and is north of Kirby Road between Church and Potomac Hills. The old black church on the west side of this area is the First Baptist Church. Rev. Cyrus Carter was the first minister of this church. At the same time he also served a community of African-Americans in Vienna.

It is named after Thos. Bryan, an 18th-Century lessor of land., which was owned by George Washington's brother, Charles.

Little Pimmit Run is the largest tributary of Pimmit Run. Little Pimmit has a large watershed. It drains parts of both Arlington and Fairfax Counties. Although the density of the population of the watershed is increasing, several parks keep the stream relatively pure. For example, Marie Butler Leven Nature Preserve, an unit of Fairfax County's Park Authority, adjoins Little Pimmit Run. More ominously, infilling in Arlington County has destroyed some of the headwaters of the stream.

Little Pimmit joins Pimmit Run a few yards downstream from the bridge of Kirby Road over the main branch.

Stromans Branch has its headwaters in Arlington County at Easter Spring behind 4607 41st St. N. This spring was named for Auntie Easter, an 18th-Century black resident. The spring served the farm of the Henry Lockwood family. Henry Lockwood, a native of New York, moved to present-day Arlington County in 1856. his daughters lived in the farmhouse until the 1960's. The farmhouse still stands on Glebe Road. During the Civil War, Northern troops stationed in nearby Fort Eathan Allen frequently visited the farm and its spring.

Henry Stoman, another emigrant from New York, owned fifty acres between the Lockwood farm and Pimmit Run in the later half of the 19th-Century.

The name of this stream is conjecture. It awaits confirmation in the historical records.

Thanks to John Weiler for this information