| Andrews Run | |
| Name Other: | Tributary to Brokenstraw Creek |
| Map Size: | 300 |
| Pushpin Map: | Pennsylvania#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Andrews Run mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Pennsylvania |
| Subdivision Type3: | County |
| Subdivision Name3: | Warren |
| Length: | 3.57miles[1] |
| Discharge1 Location: | Brokenstraw Creek |
| Discharge1 Avg: | 22.11cuft/s at mouth with Brokenstraw Creek[2] |
| Source1: | confluence of Birch Springs Run and Rattlesnake Run |
| Source1 Location: | about 3 miles south-southeast of Pittsfield, Pennsylvania |
| Source1 Coordinates: | 41.7892°N -79.3961°W[3] |
| Source1 Elevation: | 1350feet[4] |
| Mouth: | Brokenstraw Creek |
| Mouth Location: | Pittsfield, Pennsylvania |
| Mouth Coordinates: | 41.8306°N -79.3781°W |
| Mouth Elevation: | 1234feet |
| Progression: | Brokenstraw Creek → Allegheny River → Ohio River → Mississippi River → Gulf of Mexico |
| River System: | Allegheny River |
| Tributaries Left: | Birch Springs Run |
| Tributaries Right: | Rattlesnake Run |
| Bridges: | Andrews Run Road, Davey Hill Road, Old Garland Road |
Andrews Run is a 3.57miles long 3rd order tributary to Brokenstraw Creek.[1] It is classed as a cold water fishery by the Pennsylvania Fish and Boat Commission.[5]
Andrews Run is formed at the confluence of Birch Springs Run and Rattlesnake Run in Warren County, Pennsylvania about 3 miles south-southeast of Pittsfield, Pennsylvania. It then flows northeast to meet Brokenstraw Creek at Pittsfield, Pennsylvania.
Andrews Run drains of the Pennsylvania High Plateau province and is underlaid by the Venango Formation, Corry Sandstone through Riceville Formation and the Shenango through Cuyahoga Group.[6] The watershed receives an average of 43.1 in/year of precipitation and has a wetness index of 389.62.[2] The watershed is about 79% forested.