Old browser warning

Site look funky?  Your browser is so old standards-based layouts and styling confuse it.  Consider updating.  One excellent option is Mozilla Firefox, versions of which are available for Linux, Mac and Windows.

Learn about stars here

State Summary

Level Legend: Running Below Minimum Recommended Flow Above Maximum Recommended Flow Unknown
Descriptions of reaches with River Name in bold have been verified by a regional StreamTeam member.

State River Name/Section Class Level Rel. Level Updated
MD Anacostia, Northwest Branch— US Rte 29 to Riggs Road I-III(V+) 9 cfs   low 10/12 2:30
MD Antietam Creek— 1) Upper: Oak Bridge to Hwy.68 I-II 2.40 feet   low 10/12 0:00
MD Antietam Creek— 2) Hwy.68 to Potomac River I-II 2.40 ft   low 10/12 0:00
MD Bear Creek— U.S. 219 to Youghiogheny River at Friendsville IV 6 cfs   low 10/12 1:30  
MD Beaver Creek— Beaver Creek Park N Ride (I-70) to Alternate Rt. 40 I(II) 2.40 ft   low 10/12 0:00
MD Bennett Creek— MD Route 355 to Monocacy River I-II 11 cfs   low 10/12 2:30
MD Big Elk Creek— PA Route 341 to Elkton I-II 23 cfs   low 10/12 1:45
MD Broad Creek— MD Route 136 to MD Route 623 I-II
MD Cabin John Creek— River Road to Potomac II-III 13 cfs   low 10/12 2:15
MD Casselman— MD Route 495 to Salisbury, Pennsylvania I-II 7 cfs   10/11 23:00
MD Casselman, N. Branch— Dung Hill Road to Maryland Route 485 I-III+ 0.68   low 10/11 23:00
MD Catoctin Creek— US 40 to Potomac River I-II 1.52 ft   low 10/12 0:45
MD Conowingo Creek— Oakwood to Susquehanna River IV-V
MD Crabtree Creek— Swanton, MD to Savage Reservoir III-IV+ 5 cfs   low 10/12 2:15
MD Deep Creek— Dam to Youghiogheny River V
MD Deer Creek— Bond Road to Susquehanna River I-III 2.02 ft   low 10/12 0:00
MD Evitts Creek— Lake Gordon Dam (PA) to Maryland Route 51(MD) I-III 1.85 feet   low 10/12 2:30
MD Fifteen Mile Creek— US Route 40 to Potomac River I-II(III) 0.44 ft   low 10/12 2:00
MD Flintstone Creek— Flintstone Creek Road to Town Creek I-III 7 cfs   low 10/12 2:30
MD Georges Creek— Maryland Rte. 36 (Midland) to N. Branch Potomac River III-IV 3.08 ft   low 10/13 1:00
MD Gunpowder Falls— 1 - Graves Run Rd to Prettyboy Reservoir (Gunpowder Road) II+ 6 cfs   low 10/12 0:15
MD Gunpowder Falls— 2 - Prettyboy Dam to Falls Road I-III 1.43 feet   low 10/12 2:15
MD Gunpowder Falls— 3 - Falls Road to Phoenix I-II 28 cfs   low 10/12 2:15
MD Gunpowder Falls— 4 - Lower Loch Raven Dam to Route 1 I
MD Gunpowder Falls— 5 - Route 1 to U.S.40 II-III
MD Gwynns Falls— Gwynn Oak Ave. to Wilkens Ave (US 1) II-III(IV) 12 cfs   low 10/12 2:30
MD Gwynns Falls— Villa Nova to Woodlawn II 12 cfs   low 10/12 2:30
MD Herring Run— Echodale Ave to US 40 II-III 0 cfs   low 10/12 0:32
MD Hunting Creek— Catoctin Hollow Road to Frank Bentz Lake III-IV+(V) 8 cfs   low 10/12 0:45
MD Jennings Run— Barrelville to Wills Creek III+ 7 cfs   low 10/12 1:30
MD Jones Falls— Lake Roland to Round Falls I-III
md Laurel Run— Laurel Run IV 1.90 feet   low 10/12 2:15
MD Little Falls— Parkton (Maryland Route 45) to Gunpowder Falls I-III 28 cfs   low 10/12 2:15
MD Little Gunpowder Falls— U.S. Route to U.S. Route 40 II-III 28 cfs   low 10/12 2:15
MD Little Patuxent— US Route 29 (Columbia) to US Route 1 I-IV 28 cfs   low 10/13 8:00
MD Little Seneca Creek— Boyds to Darnestown II(III) 53 cfs   low 10/12 0:30
MD Long Green Creek— Glen Arm Rd. to Gunpowder Falls IV 3.50   low 10/12 2:15
MD Middle creek— Wolfsville to Myersville II-III(V) 1.52 ft   low 10/12 0:45
MD Middle Patuxent— Carroll Mill Road to Savage Mill I-II(IV) 3.15 ft   low 10/13 8:00
MD Mill Run— Pigs Ear Road to Yough River Lake III-IV+
MD Muddy Creek— Cranesville Swamp Nature Preserve (Lake Ford Road) to Youghiogheny River I-III(V)
MD Northeast Creek— below covered bridge on Route 272 V
MD Octoraro Creek— New Bridge Road to Richardsmere II 1.49 ft   low 10/12 2:30
MD Olmstead Island Creek— Clarabarton Parkway to C&O Canal V
MD Owens Creek— 1) Lantz to Roddy Covered Bridge II-IV 8 cfs   low 10/12 0:45
MD Owens Creek— 2) Rocky Ridge Road (Hwy.77) to Monocacy River I-II 8 cfs   low 10/12 0:45
MD Patapsco— Woodstock to Elkridge I-III 22 cfs   low 10/12 0:15
MD Patapsco, S. Branch— Woodbine to Woodstock I-III(IV) 22 cfs   low 10/12 0:15
MD Piney Run— Arrington Road to Marriottsville I-III(IV) 6 cfs   low 10/12 0:15
MD Potomac— 1. Sandy Hook to Point of Rocks I-II 2.90 ft   med 10/12 2:15
MD Potomac— 2. Violette's Lock/GW Canal Loop I-II 2.79 Ft   med 10/12 1:45
MD Potomac— 4. Mather Gorge to Lock 10 I-IV 2.79 ft   med 10/12 1:45
MD Potomac— 5. Lock 10 to Little Falls I 2.79 feet   med 10/12 1:45
MD Potomac— 6. Little Falls II-III(IV) 2.79 ft   med 10/12 1:45
MD Potomac River— Great Falls (Center Lines) V+ 2.79 ft   low 10/12 1:45
MD Potomac River— Great Falls (MD Lines) V+ 2.79 ft   med 10/12 1:45
MD Potomac River— Great Falls (VA Lines) V+ 2.79 ft   low 10/12 1:45
MD Potomac, N. Branch— 1. Henry to Gormania I-III 1.90 ft   low 10/12 2:15
MD Potomac, N. Branch— 2. Gormania, WV to Kitzmiller, MD III-IV 1.90 ft   low 10/12 2:15
MD Potomac, N. Branch— 3. Kitzmiller, MD to Jennings Randolph Lake I-III 1.90 ft   low 10/12 2:15
MD Potomac, N. Branch— 4. Barnum, WV to Bloomington, MD II-III 205 cfs   low 10/12 2:15
MD Rock Creek— 1. Rockville to Military Road I(II) 13 cfs   low 10/12 2:15
MD Rock Creek— 2. Military Road to Potomac River in D.C. I-III 13 cfs   low 10/12 2:15
MD Savage— Avilton Lonaconing Road to Head of Savage Reservoir II(IV) 5 cfs   low 10/12 2:15
MD Savage— Dam to North Branch Potomac River III-IV 56 cfs   low 10/12 2:15  
MD Sideling Hill Creek— Purcell Penn.(sr 2011)to the Potomac river I-II 0.44 ft   low 10/12 2:00
MD Town Creek— I-68 to Potomac River I 7 cfs   low 10/12 2:30
MD Wills Creek— Ellerslie to Eckhart Junction I-II 7 cfs   low 10/12 1:30
MD Winters Run— Pleasantville Road to Maryland Route 7 I-II 15 cfs   low 10/12 0:00
MD Youghiogheny— 0. US Route 50 to Millers Run I-II
MD Youghiogheny— 1. Tippy-Top IV 10 cfs   low 10/12 2:15
MD Youghiogheny— 2. Top IV-V 10 cfs   low 10/12 2:15  
MD Youghiogheny— 3. Upper IV-V 2.14 ft   low 10/12 1:45