1 - BALTIMORE, MARYLAND ß USGS Map
Stream			Class	Sq Miles	Page	Gauge	Min cfs	Rain Gauges/Notes
Herring Run			2+ (3)	3, 9	46	Moores Run / W Br	35, 20	Lake Roland, Fullerton [Balto]
Gwynns Falls,		§ 1	2	32	58	Gwynns Falls @ Villanova	100	Fullerton, Randallstown [Balto]
		§ 2	3 (4-)	39	59		70	At Great Oak Av
Dead Run			3 (4-)	5	61	Dead Run	100	Fullerton, Westview [Balto]
Jones Falls			2 (3+)	dam - 50	54	Release	100	Baptist Home [Balto]
Western Run			3+	1.6	56	Gwynns @ Delight	175	Pikesville [Balto]
Lower PATAPSCO			2+ (3)	285	67	Hollofield	200	Ellicott City
UPPER GUNPOWDER FALLS			3-. 1+	dam - 81	34	Parkton	90 =1.9 ft
Middle GUNPOWDER FALLS			A-1	150		Glencoe		Monkton - Sparks
Lower GUNPOWDER FALLS				dam - 340	35	Balto Canoe Club website		Go to General Chit Chat – choose Reservoir Levels
						Or [with Loch Raven Res full] Beaverdam + Western + Glencoe + Long Green – 125 = 375
Long Green Ck			4	9	42	Long Green Ck -	100	Ridge School [Balto]
	2 - HARFORD COUNTY, MARYLAND
Stream			Class	Sq Miles	Page	Gauge	Min cfs	Rain Gauges/Notes
Swan Ck			2+ (3)	11	24	Swan	115
Bynum Run			3-	9	25	Bynum	75
James Run			2+ (3-)	7	25	James	100
						Plumtree Run	35	3 hrs previous
Winters Run			1 (2)	19	27	Winters Run
Little Falls			3- (3)	32	38	Blue Mount	175	Freeland [Balto] Laurel Run
Little Gunpowder Falls			3- (3+)	43	43	Blue Mount	115
						Little GPF	106

	3 - CENTRAL MARYLAND & D.C. ß USGS Map
Stream			Class	Sq Miles	Page	Gauge		Min cfs	Rain Gauges/Notes
CABIN JOHN CK			3- (3)	18	196	Fourmile/ Sligo /Paint Br Accotink / NW Branch		75 / 33 / 72 125 / 100	Fourmile (USGS)
SENECA CK			1	101	186	Dawsonville		85
Little Seneca			2 (2+)	21	188			400
Paint Br			2 (3)	8	233	Paint Br		140	Indian Ck [Prince Georges]
Sligo Ck			3- (3+)	3, 11	229	Sligo		140	Fourmile (USGS)
ROCK CK	Fall Line		3	67	211	Sherrill Dr		160
	below Peirce Mill		2-					100
Morgan Run			3+ (3-)	23	72	NW Br @ Colesville		100	Columbia
Northwest Br			3 (5) 1	26	228	NW Br @ Colesville		250	Earlier: Sligo Ck 75
LITTLE PATUXENT			3- (4)	38	84	Guilford		125
						Savage		225
PATAPSCO So. Br. – Gaither Gorge			3-	32	73	Cedarhurst		150	Lisbon rain gauge
						Beaver Run		40
						Patuxent @ Unity		90
PATAPSCO So. Br - Berkshire Rd			2 (4)	49	73	Cedarhurst		150
						Beaver Run		40
						Patuxent @ Unity		90
PATAPSCO So. Br. – Confluence w/ North Branch			2	60	56	Cedarhurst		100
						Beaver Run		25
						Patuxent @Unity		60
Little Catoctin Ck			3 (4)	9	134	Catoctin		700, lag 3 hr	Lovettsville, VA (USGS)
						Piney (VA)		150 lag 1 hr
ANTIETAM	§1 - Waynesboro		1 (2+)	91	121	Waynesboro		175
	§2 - Funkstown		2	182	121	Waynesboro		140
						Sharpsburg		190
	§3 Devils Backbone		2	201	121	Sharpsburg		150	to the Potomac
E. Branch, Antietam				12	123	Waynesboro		600
			3-			Catoctin		400
						Bermudian Ck (PA)		60
Potomac – NEEDLES			2	6,311	178	Point of Rocks minus Millville = 500
Potomac – Whitehorse Rapid			2	9,500		Point of Rocks			Point of Rocks value, minus 1,000
THE STAIRCASE			2+	3,058	325	Millville	1.7’ - 1,000
Lower POTOMAC		GW Canal	2- 2 (3) 3	11,385	179	Little Falls	500
		Mather Gorge			181		500
		LITTLE FALLS			182		250		FOR TIDES go to Chain Bridge, near bottom

		4 - NORTH CENTRAL MARYLAND Frederick Co, Monocacy Tribs + Catoctin
Stream				Class	Sq Miles	Page	Gauge	Min cfs	Rain Gauges/Notes
Friends Ck § 3				3+	12	154	Middletown (67 sq mi)	550 – lag 4 hr	Lovettsville (USGS)
Owens Ck			§1 §3	3+ (4)	5	156		1,000 – lag 4 hr
				3+	11	158		550 – lag 3 hr
Middle Ck PA/MD § 3				3 (4-)	21	158		550 – lag 3 hr
Hunting Ck			§ 1	3	8	159		800 – lag 2 hr
			§ 3	3	11	160		600 – lag 2 hr
CATOCTIN	Middle		§ 1	4- (4=0)	12	136		600 – lag 4 hr	Class IV
	Creek		§ 2	2+	21	136		300 – lag 4 hr
	Lower			2-	35	135		200, 150