1-Atatchment M-2 Modeling Units Table.xlsx

XLSX spreadsheet 99 KB Posted Feb 14, 2026

Attached to: Engineering Services for Watershed Studies-MBE Goal 18%
Solicitation number: 1-26-3-29-8
Issued by: Maryland

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Written by GovTribe AI · Feb 18, 2026

File Summary

This is a hydraulic modeling units table prepared for the Maryland Department of the Environment (MDE) in support of watershed studies and water hazard assessment initiatives. The document serves as a technical reference for engineering services procured by the Maryland Environmental Service (MES) to support MDE's program for identifying, assessing vulnerability exposure, and mitigating water hazards across Maryland. The table catalogues 313 distinct hydraulic modeling units organized by geographic region—Appalachian Plateaus, Ridge and Valley and Blue Ridge, Piedmont, and Atlantic Coastal Plain—with detailed specifications for each watershed unit including USGS watershed numbers, total study areas measured in square miles, HEC-RAS modeling areas, stream lengths in miles, and modeling levels of detail (low, medium, and high resolution). The modeling units encompass Maryland jurisdictions and portions of bordering states, with particular emphasis on the Chesapeake Bay region and major river systems including the Potomac, Susquehanna, Patapsco, and Patuxent rivers. Supporting data columns identify governmental entities within each modeling unit, delineate land areas within Maryland boundaries versus out-of-state contributing areas, and note contingent watershed units requiring future analysis.

The table reflects a comprehensive, phased approach to statewide hydraulic modeling, with units stratified across multiple levels of analytical detail to optimize resource allocation and analytical precision. Modeling unit designations indicate priority sequencing and implementation phases, with notations identifying pilot watersheds and contingent units excluded from current scope due to geographic or jurisdictional constraints. The document includes supplementary sheets providing standardized formatting for MDE review and coordination with municipal governments, university research institutions, and federal agencies participating in watershed assessment and flood risk mitigation efforts. No specific pricing, contract duration, set-asides, or award information is contained within this technical reference document.

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Modeling Units Table

Key	Hydraulic Modelling Unit	USGS Watershed number	Name - remove eventually	Notes	Modelling Level of Detail				Total area for study (mi2)	TOTAL HEC-RAS modeling area (mi2) Note1: does NOT include V and VE zones. Note2: does include contributing area	TOTAL watershed study area (mi2). Note1: does include V and VE zones. Note2: Does NOT include contributing area.	Stream length (mi)
					Low (mi2)	Medium (mi2)	High (mi2)	Contributing Area (mi2)
Appalachian Plateaus
1	Upper Savage River	020700020101	Upper Savage River		45.7	0.6	0	0	46.234603	46.3	46.3	84
2	Crabtree Creek	020700020102	Crabtree Creek		17.4	0	0	0	17.334596	17.4	17.4	25
3	Lower Savage River	020700020103	Lower Savage River		50.8	1.3	0	0	52.077167	52.1	52.1	87
4	Shields Run	020700020201	Shields Run-North Branch Potomac River		21.2	0	0	19.8	21.167796	41	21.2	66
5	Buffalo Creek	020700020203	Buffalo Creek-North Branch Potomac River		20.6	0.7	0	22.8	21.279471	44.1	21.3	71
6	Lostland Run	020700020205	Lostland Run-North Branch Potomac River		31.6	0.9	0	9.4	32.462813	41.9	32.5	64
7	Bloomington Lake	020700020206	Bloomington Lake-North Branch Potomac River		16.1	0.2	0	18	16.142596	34.3	16.3	47
8	Piney Swamp Run	020700020207	Piney Swamp Run-North Branch Potomac River		14.1	0.8	0	13.4	14.8052	28.3	14.9	39
9	Upper Georges Creek	020700020301	Upper Georges Creek		29.9	7.8	0	0	37.596086	37.7	37.7	57
10	Lower Georges Creek	020700020302	Lower Georges Creek		32.1	4.5	0	0	36.538206	36.6	36.6	51
11	Limestone Run	020700020402	Limestone Run-North Branch Potomac River		17.6	3.2	0	20.6	20.651329	41.4	20.8	77
12	Jennings Run	020700020505	Jennings Run		26.7	2.4	0	9	28.982229	38.1	29.1	61
14	Cherry Creek	050200060102	Cherry Creek		16.7	0	0	0	16.744274	16.7	16.7	28
15	Rhine Creek	050200060105	Rhine Creek-Youghiogheny River	Includes Snowy Creek	11.3	1.7	0	63.7	12.875049	76.7	13	143
16	Little Youghiogheny River	050200060104	Little Youghiogheny River		26	14.9	0	0	40.830701	40.9	40.9	75
17	Muddy Creek	050200060106	Muddy Creek		8.6	0	0	9.2	8.588338	17.8	8.6	28
18	Herrington Run	050200060107	Herrington Run-Youghiogheny River		31	0.3	0	1.8	31.248484	33.1	31.3	62
19	Deep Creek Lake	050200060201	Upper Deep Creek Lake	includes upper and lower Deep Creek Lake	58.9	5.2	0	0	64.034693	64.1	64.1	88
21	Salt Block Run	050200060301	Salt Block Run-Youghiogheny River		36.6	6.3	0	4.6	42.809231	47.5	42.9	76
22	Bear Creek	050200060302	Bear Creek		42.4	7	0	0	49.352755	49.4	49.4	76
24	Mill Run	050200060304	Mill Run		13.4	0.8	0	3.6	14.120058	17.8	14.2	24
25	Youghiogheny River Lake	050200060305	Youghiogheny River Lake-Youghiogheny River	Includes Buffalo Run	26	0.5	0	5.2	26.45668	31.7	26.5	54
26	Red Run-Piney Creek	050200060403	Red Run-Piney Creek		18.1	2	0	4.1	20.017159	24.2	20.1	39
27	Casselman River Headwaters	050200060401	Headwaters Casselman River	includes MD portions of Tub Mill Run - Casselman River and Flag Run - Casselman River watersheds	58.6	13	0	27	40.830701	98.6	71.6	132
29	Wills Creek	020700020507	Braddock Run-Wills Creek	includes MD portion of Shaffers Run-Wills Creek watershed	16.4	14.2	0	184.5	30.439281	215.1	30.6	436
Ridge and Valley, and Blue Ridge											0	0
30	Mill Run - Potomac	020700020403	Mill Run-North Branch Potomac River		19.1	16.8	0	7.9	35.874203	43.8	35.9	96
31	Evitts Creek	020700020603	Lower Evitts Creek	includes MD portions of Middle Evitts Creek	21	10.1	0	63.4	30.999474	94.5	31.1	229
32	Collier Run	020700020801	Collier Run-North Branch Potomac River		13	8.7	0	9.2	21.604972	30.9	21.7	55
33	Mill Run	020700020802	Mill Run		21.8	0	0	0	21.728309	21.8	21.8	59
34	Green Spring Run-North Branch Potomac River	020700020803	Green Spring Run-North Branch Potomac River		14.6	1.1	0	25.6	15.563243	41.3	15.7	96
35	Flintstone Creek	020700030102	Flintstone Creek	includes MD portions of Sweet Root Creek-Town Creek	11.8	1	0	89	12.670352	101.8	12.8	254
36	Murley Branch	020700030103	Murley Branch		12.4	0	0	0	12.328997	12.4	12.4	33
37	Peters Run	020700030105	Peters Run-Town Creek		20	0	0	0	19.941668	20	20	58
38	Sawpit Creek	020700030106	Sawpit Run-Town Creek		23.1	0	0	0	23.031795	23.1	23.1	68
39	Upper Fifteenmile Creek	020700030301	Upper Fifteenmile Creek		24.7	0	0	12	24.621112	36.7	24.7	110
40	Lower Fifteenmile Creek	020700030302	Lower Fifteenmile Creek		24.9	0.4	0	0	25.167673	25.3	25.3	73
41	Crooked Run-Sideling Hill Creek	020700030404	Crooked Run-Sideling Hill Creek		10.5	0	0	72.6	10.433147	83.1	10.5	230
42	Bear Creek-Sideling Hill Creek	020700030405	Bear Creek-Sideling Hill Creek		13	0.3	0	7.8	13.211588	21.1	13.3	63
43	Purslane Run	020700030801	Purslane Run-Potomac River		14.4	1	0	9.4	15.224115	24.8	15.4	66
44	Rockwell Run	020700030802	Rockwell Run-Potomac River		11.3	5.2	0	25.7	16.466159	42.2	16.5	119
45	Willett Run-Potomac River	020700030803	Willett Run-Potomac River		9.3	1.8	0	14.7	11.020852	25.8	11.1	68
46	Ditch Run	020700040504	Ditch Run-Potomac River	includes MD portion of Barnetts Run Tonoloway Creek watershed	11	4.8	0	121.4	15.701959	137.2	15.8	399
47	Lanes Run-Licking Creek	020700040305	Lanes Run-Licking Creek		22.7	1.3	0	223.1	23.932904	247.1	24	668
48	Minnow Run-Little Tonoloway Creek	020700040501	Minnow Run-Little Tonoloway Creek		13.9	1.7	0	9.8	15.477838	25.4	15.6	65
49	Sir Johns Run	020700040502	Sir Johns Run-Potomac River		6	2.7	0	12.2	8.664761	20.9	8.7	44
50	Cherry Run	020700040505	Cherry Run-Potomac River		10.7	2.7	0	15	13.278032	28.4	13.4	70
51	Conococheague Creek	020700040807	Meadow Brook-Conococheague Creek	includes the MD portion of Rockdale Run Conococheague Creek watershed	39.1	26.6	0	468.4	65.556237	534.1	65.7	1173
52	Little Antietam Creek	020700041004	Little Antietam Creek		24.6	0.2	0	0	24.676746	24.8	24.8	51
53	West Branch Marsh Run	020700041005	West Branch Marsh Run-Marsh Run		6.9	6.3	0	18.7	13.061222	31.9	13.2	37
54	Antietam Creek	020700041006	Antietam Creek		11.8	5.6	0	94.3	17.370167	111.7	17.4	185
55	Beaver Creek	020700041007	Beaver Creek		33.6	0	0	0	33.589864	33.6	33.6	69
56	Dog Creek-Little Antietam Creek	020700041008	Dog Creek-Little Antietam Creek		30.7	1.3	0	0	31.924937	32	32	58
57	Sharmans Branch-Antietam Creek	020700041009	Sharmans Branch-Antietam Creek	PILOT WATERSHED	35.3	22.1	0	0	57.218354	57.4	57.4	103
59	Little Conococheague Creek	020700041102	Little Conococheague Creek		15.7	1.1	0	1.4	16.692469	18.2	16.8	41
60	Camp Spring Run-Potomac River	020700041103	Camp Spring Run-Potomac River		18.3	7.7	0	22.3	25.927292	48.3	26	82
61	Saint James Run-Marsh Run	020700041104	Saint James Run-Marsh Run		13.7	7.4	0	0	21.020217	21.1	21.1	26
62	Rattlesnake Run-Potomac River	020700041106	Rattlesnake Run-Potomac River		20.7	5.4	0	30.2	25.997569	56.3	26.1	58
64

: @slee@menv.com why are these shaded and no data?

-Eileen Gladd -MDE-	Harpers Ferry-Potomac River	020700041108	Harpers Ferry-Potomac River	12.4	0.3	0	7.9	12.641831	20.6	12.7	38
66	Upper Catoctin Creek

: I took out Shenandoah River from table, make sure map matches @slee@menv.com

-Eileen Gladd -MDE-	020700080101	Upper Catoctin Creek		27.6	6.1	0	0	33.631064	33.7	33.7	56
67	Middle Catoctin Creek	020700080102	Middle Catoctin Creek		35.1	15	0	0	50.073365	50.1	50.1	119
68	Lower Catoctin Creek	020700080103	Lower Catoctin Creek		28.3	8.6	0	0	36.832818	36.9	36.9	95
69	Israel Creek	020700080201	Israel Creek		12.2	3.3	0	15.9	15.368559	31.4	15.5	69
70	Piney Run-Potomac River	020700080202	Piney Run-Potomac River		10.7	11.5	0	21.5	22.096392	43.7	22.2	109
71	Owens Creek	020700090504	Owens Creek		31.8	8	0	0	39.742918	39.8	39.8	76
72	Little Hunting Creek-Big Hunting Creek	020700090505	Little Hunting Creek-Big Hunting Creek		34.2	7.5	0	0	41.679601	41.7	41.7	77
Piedmont											0	0
74	Octoraro Creek	020503061502	Tweed Creek-Octoraro Creek	Include Basin Run and Tweek Creek portions of Octoraro Creek	29.9	4.9	0	175.6	34.747082	210.4	34.8	376
75	Headwaters Deer Creek	020503061601	Headwaters Deer Creek		29.1	2.7	0	21.7	31.645971	53.5	31.8	107
76	Upper Deer Creek	020503061602	Upper Deer Creek		33.4	1.7	0	3.8	35.019483	38.9	35.1	66
77	Middle Deer Creek	020503061603	Middle Deer Creek		35.7	2.4	0	0	38.002003	38.1	38.1	64
78	Lower Deer Creek	020503061604	Lower Deer Creek		40.6	0.6	0	0	40.854391	41.2	41.2	78
79	Broad Creek	020503061710	Broad Creek		39.6	0	0	0.7	39.586682	40.3	39.6	61
80	Conowingo Dam-Susquehanna River	020503061712	Conowingo Dam-Susquehanna River	Includes Conowingo Creek	22.9	0.5	0	37.9	23.346236	61.3	23.4	99
81	Rock Run-Susquehanna River	020503061713	Rock Run-Susquehanna River		11.6	16.5	0	0	28.03765	28.1	28.1	43
82	Little North East Creek	020600020101	Little North East Creek		17.8	0.6	0	0.5	18.313029	18.9	18.4	35
83	North East Creek	020600020102	North East Creek		28.9	0.9	0	7.6	29.690276	37.4	29.8	76
84	Mill Creek-Furnace Bay	020600020103	Mill Creek-Furnace Bay		25.3	1.5	0	0	26.780629	26.8	26.8	47
85	Little Elk Creek	020600020202	Little Elk Creek		25.8	4	0	12.5	29.695159	42.3	29.8	88
86	Upper Winters Run	020600030101	Upper Winters Run		27.2	9.1	0	0	36.211109	36.3	36.3	63
87	Lower Winters Run	020600030102	Lower Winters Run		8	11.3	0	0	19.197661	19.3	19.3	40
88	Bynum Run-Bush Creek	020600030103	Bynum Run-Bush Creek		17.2	18.4	0	0	35.439154	35.6	35.6	64
89	Church Creek-Bush River	020600030104	Church Creek-Bush River		5.6	9.7	0	0	15.231098	15.3	15.3	40
90	Swan Creek-Frontal Chesapeake Bay

: this needs a new name - repeat of 185 -Eileen Gladd -MDE- 185 proper name is Still Pond Creek, that one was modified

	-Sam Lee -MDP-	020600030201	Swan Creek-Frontal Chesapeake Bay		11.7	13.8	0	0	27.401812	25.5	25.5	54
	91	South Branch Gunpowder Falls-Gunpowder Falls	020600030301	South Branch Gunpowder Falls-Gunpowder Falls		23.2	1	0	7	24.138671	31.2	24.2	69
	92	Prettyboy Reservoir-Gunpowder Falls	020600030302	Prettyboy Reservoir-Gunpowder Falls		44.5	4.3	0	0	48.668769	48.8	48.8	102
	93	Little Falls	020600030401	Little Falls		49.9	0	0	4.2	49.807138	54.1	49.9	108
	94	Piney Creek-Gunpowder Falls	020600030402	Piney Creek-Gunpowder Falls		47.9	0	0.5	0	48.280883	48.4	48.4	91
	95	Piney Run-Western Run	020600030403	Piney Run-Western Run		18.8	0.9	0	0	19.567301	19.7	19.7	50
	96	Blackrock Run-Western Run	020600030404	Blackrock Run-Western Run		42.6	0	1.6	0	44.07293	44.2	44.2	101
	97	Beaverdam Run	020600030405	Beaverdam Run		14	0	8.1	0	21.986649	22.1	22.1	37
	98	Loch Raven Reservoir-Gunpowder Falls	020600030406	Loch Raven Reservoir-Gunpowder Falls		27.3	0	9.4	0	36.52969	36.7	36.7	52
	99	Little Gunpowder Falls	020600030501	Little Gunpowder Falls		55.3	3.1	0	0	58.255254	58.4	58.4	107
	100	Long Green Creek-Gunpowder Falls	020600030502	Long Green Creek-Gunpowder Falls		32.2	1.5	12.8	0	46.265659	46.5	46.5	84
	101	Redhouse Creek-Back River	020600030702	Redhouse Creek-Back River		0	0	31.3	0	31.275665	31.3	31.3	41
	102	East Branch North Branch Patapsco River	020600030801	East Branch North Branch Patapsco River		20.4	0.7	0	0	20.944006	21.1	21.1	49
	103	Headwaters North Branch Patapsco River	020600030802	Headwaters North Branch Patapsco River		8.8	11.9	0	0	20.588197	20.7	20.7	49
	104	Beaver Run-Liberty Lake	020600030803	Beaver Run-Liberty Lake		6.5	9.7	0	0	16.109327	16.2	16.2	40
	105	Morgan Run-Liberty Lake	020600030804	Morgan Run-Liberty Lake		37	7.5	0	0	44.391662	44.5	44.5	106
	106	Deep Run-North Branch Patapsco River	020600030805	Deep Run-North Branch Patapsco River		35	10.2	0.8	0	45.844855	46	46	102
	107	Falls Run-North Branch Patapsco River	020600030806	Falls Run-North Branch Patapsco River		17.6	4.7	0.3	0	22.431926	22.6	22.6	47
	108	Red Run-Gwynns Falls	020600030901	Red Run-Gwynns Falls		3	0	14.9	0	17.790664	17.9	17.9	35
	109	Dead Run-Gywnns Falls	020600030902	Dead Run-Gywnns Falls		0	0	49.1	0	49.141085	49.1	49.1	79
	110	Gillis Falls	020600031001	Gillis Falls		19.3	0	0	0	19.263871	19.3	19.3	48
	111	Hay Meadow Branch-South Branch Patapsco River	020600031002	Hay Meadow Branch-South Branch Patapsco River		18.1	5	0	0	23.064357	23.1	23.1	60
	112	Piney Run	020600031003	Piney Run		12.2	6.3	0	0	18.393305	18.5	18.5	44
	113	Piney Branch-South Branch Patapsco River	020600031004	Piney Branch-South Branch Patapsco River		20.6	4.6	0	0	25.126232	25.2	25.2	69
	114	Brice Run-Patapsco River	020600031101	Brice Run-Patapsco River		18.3	1.5	26.7	0	46.393726	46.5	46.5	104
	115	Deep Run-Patapsco River	020600031102	Deep Run-Patapsco River		0	17.3	26	0	43.229294	43.3	43.3	121
	116	Jones Falls	020600031201	Jones Falls		19	0	39	0	57.876606	58	58	93
	117	Cabin Branch-Patuxent River	020600060101	Cabin Branch-Patuxent River		35	0.3	0	0	35.125175	35.3	35.3	79
	118	Cattail Creek	020600060102	Cattail Creek		27.8	0	0	0	27.778936	27.8	27.8	64
	119	Triadelphia Reservoir-Patuxent River	020600060103	Triadelphia Reservoir-Patuxent River		16	0	0	0	15.944665	16	16	39
	120	Hawlings River	020600060104	Hawlings River		23.1	5	0	0	27.955141	28.1	28.1	65
	121	Rocky Gorge Reservoir-Patuxent River	020600060105	Rocky Gorge Reservoir-Patuxent River		22.5	2.7	0.3	0	25.361051	25.5	25.5	68
	122	Benson Branch-Middle Patuxent River	020600060201	Benson Branch-Middle Patuxent River		35.3	22.8	0	0	58.046491	58.1	58.1	146
	123	Dorsey Run-Little Patuxent River	020600060202	Dorsey Run-Little Patuxent River		6.7	0	59.7	0	66.3133	66.4	66.4	168
	124	Tuscarora Creek-Potomac River	020700080401	Tuscarora Creek-Potomac River		16	13.8	0	11.2	29.697123	41	29.8	110
	125	Little Monocacy River	020700080402	Little Monocacy River		18.8	0	0	0	18.79558	18.8	18.8	48
	126	Limestone Branch-Potomac River	020700080403	Limestone Branch-Potomac River		27.9	1.4	0	31.2	29.254502	60.5	29.3	155
	127	Little Seneca Creek	020700080801	Little Seneca Creek		23.7	1.1	13.5	0	38.176121	38.3	38.3	92
	128	Great Seneca Creek	020700080802	Great Seneca Creek		27.3	35.4	0	0	62.626975	62.7	62.7	153
	129	Dry Seneca Creek	020700080803	Dry Seneca Creek-Seneca Creek		25.8	3.9	0	0	29.640624	29.7	29.7	82
	130	Selden Island-Potomac River	020700080904	Selden Island-Potomac River		19.8	0.9	0	8.3	20.615896	29	20.7	79
	131	Muddy Branch	020700081001	Muddy Branch		4.1	15.4	0	0	19.465267	19.5	19.5	49
	132	Watts Branch	020700081002	Watts Branch		8.1	14.3	0	0	22.294809	22.4	22.4	47
	133	Cabin John Creek	020700081003	Cabin John Creek		2.8	22.9	0	0	25.621847	25.7	25.7	40
	134	Nichols Run-Potomac River	020700081005	Nichols Run-Potomac River		11.4	5.6	9.6	113	26.422251	139.6	26.6	555
	135	Lower Toms Creek	020700090303	Lower Toms Creek	includes MD portion of Middle Creek watershed	22.3	7.5	0	59.1	29.697136	88.9	29.8	175
	136	Upper Little Pipe Creek	020700090401	Upper Little Pipe Creek		24.7	8.5	0	0	33.127339	33.2	33.2	76
	137	Middle Little Pipe Creek	020700090402	Middle Little Pipe Creek		22.4	7.1	0	0	29.461843	29.5	29.5	62
	138	Lower Little Pipe Creek	020700090403	Lower Little Pipe Creek		16.9	3.8	0	0	20.683204	20.7	20.7	40
	139	Upper Big Pipe Creek	020700090404	Upper Big Pipe Creek		51.7	0	0	0	51.643872	51.7	51.7	116
	140	Lower Big Pipe Creek-Double Pipe Creek	020700090405	Lower Big Pipe Creek-Double Pipe Creek		53	5.1	0	0	57.962407	58.1	58.1	125
	142	Piney Creek	020700090502	Piney Creek		18.5	3.6	0	161.6	21.997163	183.7	22.1	492
	141	Cattail Branch-Monocacy River	020700090503	Cattail Branch-Monocacy River	Includes Lower Rock Creek, Lower Marsh Creek and Alloway Creek	23	4.3	0	7.3	27.187564	34.6	27.3	69
	143	Broad Run-Monocacy River	020700090506	Broad Run-Monocacy River		20	7.9	0	0	27.777514	27.9	27.9	57
	144	Tuscarora Creek-Monocacy River	020700090601	Tuscarora Creek-Monocacy River		37.6	19	0	0	56.497223	56.6	56.6	125
	145	South Fork Linganore Creek	020700090602	South Fork Linganore Creek		16.1	3.5	0	0	19.574571	19.6	19.6	46
	146	North Fork Linganore Creek	020700090603	North Fork Linganore Creek		18.2	2.2	0	0	20.301224	20.4	20.4	48
	147	Upper Linganore Creek	020700090604	Upper Linganore Creek		16.7	4.4	0	0	21.041052	21.1	21.1	51
	148	Lower Linganore Creek	020700090605	Lower Linganore Creek		12.1	4	12	0	27.988416	28.1	28.1	69
	149	Carroll Creek-Monocacy River	020700090606	Carroll Creek-Monocacy River		28.9	32.5	0.3	0	61.479697	61.7	61.7	134
	150	Bush Creek	020700090701	Bush Creek		20.2	10.6	1.2	0	31.891769	32	32	80
	151	Little Bennett Creek	020700090702	Little Bennett Creek		21.9	2.4	0.4	0	24.570353	24.7	24.7	60
	152	Bennett Creek	020700090703	Bennett Creek		26.4	15.1	0	0	41.394698	41.5	41.5	105
	153	Ballenger Creek-Monocacy River	020700090704	Ballenger Creek-Monocacy River		26.1	7.2	24.3	0	56.056249	57.6	57.6	135
	154	Upper Rock Creek	020700100101	Upper Rock Creek		10.7	30.2	0	0	40.804525	40.9	40.9	77
	155	Lower Rock Creek	020700100102	Lower Rock Creek		0	20.6	0	0	20.587443	20.6	20.6	74
	156	Northwest Branch Anacostia River	020700100201	Northwest Branch Anacostia River		30.5	9.9	9.7	0	49.910386	50.1	50.1	220
	157	Paint Branch	020700100202	Paint Branch		4.5	16.2	10.6	0	31.205716	31.3	31.3	63
		Atlantic Coastal Plain
	158	Saint Martin River	020403030302	Saint Martin River		24.4	9	0	8.1	33.259062	41.5	33.4	80
	159	Assawoman Bay	020403030303	Assawoman Bay		3.9	4.9	0	6.8	8.705385	15.6	8.8	33
	160	Isle of Wight Bay	020403030304	Isle of Wight Bay		6	13	0	0	18.844656	19	19	55
	161	Newport Bay	020403030401	Newport Bay	Include Sinepuxent Bay	23.5	28.1	0	0	51.475904	51.6	51.6	158
	163	Robins Creek-Chincoteague Bay	020403030403	Robins Creek-Chincoteague Bay	Include Calpen Bay and Swans Gut Creek	0	4.2	0	0	4.108059	4.2	4.2	1
	162	Fenwick Island-Atlantic Ocean	020403030602	Fenwick Island-Atlantic Ocean	Include Assateague Island	37	18.8	0	0	55.730802	55.8	55.8	142
	164	North East River	020600020104	North East River-Frontal Chesapeake Bay	Includes Elk Neck-Frontal Chesapeake Bay	10.2	8.3	0	0	18.381966	18.5	18.5	33
	165	Big Elk Creek	020600020203	Big Elk Creek		1.6	19.4	0	42.8	20.834802	63.8	21	125
	166	Long Creek-Back Creek	020600020204	Long Creek-Back Creek		18.5	4.8	0	17.4	20.886167	40.7	23.3	64
	167	Perch Creek-Elk River	020600020205	Perch Creek-Elk River		16.3	6.7	0	2.1	26.696587	25.1	23	62
	168	Bohemia River	020600020206	Bohemia River		33.5	8.2	0	9	41.629526	50.7	41.7	97
	169	Elk River-Frontal Chesapeake Bay	020600020207	Elk River-Frontal Chesapeake Bay		21.1	8	0	0	34.142379	29.1	29.1	60
	170	Upper Sassafras River	020600020301	Upper Sassafras River		29.9	4.2	0	8.1	33.986128	42.2	34.1	79
	171	Lower Sassafras River	020600020302	Lower Sassafras River		32.3	16.8	0	0	49.032648	49.1	49.1	109
	172	Cypress Branch	020600020401	Cypress Branch		21.8	0.4	0	15.7	22.080799	37.9	22.2	63
	173	Andover Branch	020600020402	Andover Branch		21.4	0	0	24.9	21.361883	46.3	21.4	124
	174	Unicorn Branch	020600020403	Unicorn Branch		18.8	1.5	0	0	20.190896	20.3	20.3	40
	175	Red Lion Branch	020600020404	Red Lion Branch		23.5	0.5	0	0	23.971503	24	24	37
	176	Morgan Creek	020600020405	Morgan Creek		33.6	2.1	0	0	35.581478	35.7	35.7	76
	177	Upper Chester River	020600020406	Upper Chester River		42.6	11.5	0	0	54.051936	54.1	54.1	95
	178	Southeast Creek	020600020407	Southeast Creek		49.9	5.4	0	0	55.15667	55.3	55.3	100
	179	Middle Chester River	020600020408	Middle Chester River		21.5	19.9	0	0	41.306566	41.4	41.4	76
	180	Corsica River	020600020409	Corsica River		34.1	4.3	0	0	38.298315	38.4	38.4	61
	181	Langford Creek	020600020410	Langford Creek		27.7	12.7	0	0	40.338949	40.4	40.4	66
	182	Lower Chester River	020600020411	Lower Chester River		15.1	21.7	0	0	36.636088	36.8	36.8	71
	183	Still Pond Creek-Frontal Chesapeake Bay	020600020501	Still Pond Creek-Frontal Chesapeake Bay		16.6	6.1	0	0	22.617706	22.7	22.7	70
	184	Fairlee Creek-Frontal Chesapeake Bay	020600020502	Fairlee Creek-Frontal Chesapeake Bay		31.6	8.5	0	0	39.991132	40.1	40.1	87
	185	Still Pond Creek-Frontal Chesapeake Bay	020600020503	Swan Creek-Frontal Chesapeake Bay		5.4	6	0	0	11.285583	11.4	11.4	13
	186	Cox Creek-Frontal Eastern Bay	020600020607 and
020600020504	Cox Creek-Frontal Eastern Bay and
Craney Creek-Frontal Chesapeake Bay	Includes Craney Creek-Frontal Chesapeake Bay	0	28.9	0	0	28.866295	28.9	28.9	65
	187	Skipton Creek	020600020601	Skipton Creek		17.7	1.9	0	0	19.509503	19.6	19.6	52
	188	Upper Wye East River	020600020602	Upper Wye East River		27.8	2.6	0	0	30.373554	30.4	30.4	65
	189	Lower Wye East River	020600020603	Lower Wye East River		5.9	5	0	0	11.568054	10.9	10.9	37
	190	Wye River	020600020604	Wye River		12.2	13.7	0	0	27.786093	25.9	25.9	88
	191	Miles River	020600020605	Miles River		28.3	16.1	0	0	52.594412	44.4	44.4	148
	192	Prospect Bay-Eastern Bay	020600020606	Prospect Bay-Eastern Bay		3.9	8	0	0	11.789083	11.9	11.9	24
	193	Tilghman Creek-Frontal Eastern Bay	020600020608	Tilghman Creek-Frontal Eastern Bay		1.9	3.6	0	0	8.923877	5.5	5.5	12
	194	Bush River	020600030105	Bush River		0	22.9	0	0	22.919822	22.9	22.9	40
	197	Patapsco River South	020600031203			0	13.5	0	0	13.438441	13.5	13.5	8
	198	Whitemarsh Run-Bird River	020600030601	Whitemarsh Run-Bird River		2.2	2.4	22.5	0	26.899165	27.1	27.1	53
	199	Gunpowder River	020600030602	Gunpowder River-Frontal Chesapeake Bay		2.2	16.3	5.7	0	24.045498	24.2	24.2	32
	200	Middle River	020600030701	Middle River		0.3	11	0	0	11.242323	11.3	11.3	13
	201	Back River-Frontal Chesapeake Bay	020600030703	Back River-Frontal Chesapeake Bay		2.1	23.5	0	0	25.500917	25.6	25.6	35
	202	Herbert Run-Patapsco River	020600031103	Herbert Run-Patapsco River		0	7.1	17.8	0	24.799657	24.9	24.9	55
	203	Curtis Creek	020600031202	Curtis Creek-Curtis Bay		0	34.2	3.3	0	37.430561	37.5	37.5	80
	204	Patapsco River North	020600031203	Northwest Harbor-Patapsco River		0	4.8	0	0	4.700709	4.8	4.8	2
	205	Patapsco River-Frontal Chesapeake Bay	020600031204	Patapsco River-Frontal Chesapeake Bay		0	42.8	0	0	42.707866	42.8	42.8	64
	206	Cattail Creek-Magothy River	020600040101	Cattail Creek-Magothy River		0	23.3	0	0	23.209085	23.3	23.3	44
	207	Sillery Bay-Frontal Chesapeake Bay	020600040102	Sillery Bay-Frontal Chesapeake Bay		0	15.6	0	0	15.543805	15.6	15.6	32
	208	Severn Run	020600040201	Severn Run		6.5	18.9	0	0	25.345539	25.4	25.4	64
	209	Round Bay-Severn River	020600040202	Round Bay-Severn River		7.4	13.3	0	0	20.616388	20.7	20.7	44
	210	Severn River-Frontal Chesapeake Bay	020600040203	Severn River-Frontal Chesapeake Bay		0	32.2	0	0	32.191412	32.2	32.2	60
	211	Beacon Ridge Branch-North River	020600040301	Beacon Ridge Branch-North River		20.7	0.5	0	0	21.085878	21.2	21.2	45
	212	Beards Creek-South River	020600040302	Beards Creek-South River		14.4	24.3	0	0	38.566996	38.7	38.7	60
	213	Rhode River-West River	020600040401	Rhode River-West River		17.1	11.3	0	0	28.307417	28.4	28.4	65
	214	Tracys Creek-Frontal Chesapeake Bay	020600040402	Tracys Creek-Frontal Chesapeake Bay		32.3	14	0	0	46.19813	46.3	46.3	88
	215	Parkers Creek-Frontal Chesapeake Bay	020600040403	Parkers Creek-Frontal Chesapeake Bay		27.7	7.8	0	0	35.465375	35.5	35.5	58
	216	Saint Jerome Creek-Frontal Chesapeake Bay	020600040404	Saint Jerome Creek-Frontal Chesapeake Bay		9.2	13.3	0	0	22.450185	22.5	22.5	39
	217	Upper Mason Branch	020600050101	Upper Mason Branch	Include Lower Mason Branch	52.3	0	0	0	52.277078	52.3	52.3	142
	218	Jarmans Branch	020600050103	Jarmans Branch		21.9	0	0	0	21.840971	21.9	21.9	59
	219	Norwich Creek-Tuckahoe Creek	020600050104	Norwich Creek-Tuckahoe Creek	Include Jadwins Creek	75	5.3	0	0	80.196078	80.3	80.3	226
	220	Tappahanna Ditch-Choptank River	020600050202	Tappahanna Ditch-Choptank River	Include Gravelly Branch and Forge Branch	57.4	8.8	0	93.7	66.064511	159.9	66.2	440
	221	Chapel Branch-Choptank River	020600050205	Chapel Branch-Choptank River	Include Fowling Creek	76.7	14.8	0	7.6	91.436619	99.1	91.5	294
	222	Kings Creek	020600050301	Kings Creek	Include Williams Creek	42.9	10	0	0	52.892397	52.9	52.9	156
	223	Hunting Creek	020600050303	Hunting Creek		21.9	2.2	0	0	23.996871	24.1	24.1	50
	224	Marsh Creek-Choptank River	020600050304	Marsh Creek-Choptank River		32.2	12.6	0	0	44.713862	44.8	44.8	125
	225	Fishing Creek-Little Choptank River	020600050401	Fishing Creek-Little Choptank River	Include Slaughter Creek	12.1	51.2	0	0	63.401892	63.3	63.3	64
	226	Warwick River-Choptank River	020600050501	Warwick River-Choptank River	Include Bolingbroke Creek	32	15.3	0	0	47.247629	47.3	47.3	92
	227	Trappe	020600050503

: @slee@menv.com what goes here?

-Eileen Gladd -MDE- : @slee@menv.com what goes here?

-Eileen Gladd -MDE- : this needs a new name - repeat of 185 -Eileen Gladd -MDE- 185 proper name is Still Pond Creek, that one was modified -Sam Lee -MDP- : @slee@menv.com why are these shaded and no data?

-Eileen Gladd -MDE- : I took out Shenandoah River from table, make sure map matches @slee@menv.com

-Eileen Gladd -MDE-			Include Brannock Bay	8	4.2	0	0	12.032775	12.2	12.2	17
262	La Trappe Creek	020600050503	La Trappe Creek-Choptank River		3	13.3	0	0	16.197076	16.3	16.3	13
228	Tred Avon River	020600050504	Tred Avon River-Frontal Choptank River		24.6	26	0	0	50.509368	50.6	50.6	68
229	Broad Creek-Frontal Choptank River	020600050505	Broad Creek-Frontal Choptank River		6	15.1	0	0	25.255991	21.1	21.1	45
230	Harris Creek-Frontal Choptank River	020600050506	Harris Creek-Frontal Choptank River		3.6	10.8	0	0	17.017933	14.4	14.4	29
231	Honga River	020600050602	Charles Creek-Honga River	Includes Saint John Creek-Frontal Chesapeake Bay, Fox Creek-Honga River, Tar Bay-Frontal Chesapeake Bay	10.3	121.5	0	0	136.652834	131.8	131.8	399
232	Towsers Branch-Little Patuxent River	020600060203	Towsers Branch-Little Patuxent River		10.8	26.6	0	0	37.236962	37.4	37.4	107
233	Southwest Branch Western Branch Patuxent River	020600060301	Southwest Branch Western Branch Patuxent River		0.7	0.6	14.7	0	15.800556	16	16	28
234	Western Branch Patuxent River	020600060302	Western Branch Patuxent River		6	0	24.6	0	30.425723	30.6	30.6	49
235	Collington Branch	020600060303	Collington Branch		1.9	21.4	0.2	0	23.313257	23.5	23.5	42
236	Charles Branch-Western Branch Patuxent River	020600060304	Charles Branch-Western Branch Patuxent River		14.3	27.8	0	0	42.051339	42.1	42.1	71
237	Horsepen Branch-Patuxent River	020600060401	Horsepen Branch-Patuxent River		6.6	13.9	28.1	0	48.435457	48.6	48.6	134
238	Stocketts Run-Patuxent River	020600060402	Stocketts Run-Patuxent River		27.3	12.7	0	0	39.892588	40	40	79
239	Wilson Owens Branch-Patuxent River	020600060403	Wilson Owens Branch-Patuxent River		26.1	6.1	0	0	32.170947	32.2	32.2	70
240	Lyons Creek	020600060501	Lyons Creek		18.9	0.5	0	0	19.312751	19.4	19.4	34
241	Mataponi Creek-Patuxent River	020600060502	Mataponi Creek-Patuxent River		32	5.5	0	0	37.374967	37.5	37.5	83
242	Hall Creek	020600060503	Hall Creek		17.6	2.8	0	0	20.33857	20.4	20.4	36
243	Chew Creek-Patuxent River	020600060504	Chew Creek-Patuxent River		31.4	5.8	0	0	37.116807	37.2	37.2	77
244	Hunting Creek	020600060505	Hunting Creek		25.1	2.4	0	0	27.39484	27.5	27.5	46
245	Tucker Creek-Patuxent River	020600060506	Tucker Creek-Patuxent River		27.4	5.6	0	0	32.962724	33	33	61
246	Swanson Creek-Patuxent River	020600060507	Swanson Creek-Patuxent River		32	3.6	0	0	35.435478	35.6	35.6	56
247	Indian Creek-Patuxent River	020600060601	Indian Creek-Patuxent River		35	12.4	0	0	47.282788	47.4	47.4	87
248	Battle Creek-Patuxent River	020600060602	Battle Creek-Patuxent River		30.4	6.7	0	0	36.95126	37.1	37.1	91
249	Saint Leonard Creek-Patuxent River	020600060603	Saint Leonard Creek-Patuxent River		26.7	9.7	0	0	36.259911	36.4	36.4	76
250	Mill Creek-Patuxent River	020600060604	Mill Creek-Patuxent River		11.7	17.6	0	0	29.271796	29.3	29.3	69
251	Northeast Branch Anacostia River	020700100203	Northeast Branch Anacostia River		14.7	0	28.9	0	43.485575	43.6	43.6	90
252	Lower Anacostia River	020700100204	Lower Anacostia River		0	0	20.3	0	20.217222	20.3	20.3	66
253	Fourmile Run-Potomac River	020700100301	Fourmile Run-Potomac River		0	0	11.4	0	11.346314	11.4	11.4	51
254	Henson Creek	020700100303	Henson Creek		0	0	25.8	0	25.70748	25.8	25.8	48
255	Tinkers Creek	020700100304	Tinkers Creek		0	18.4	0	0	18.359791	18.4	18.4	25
256	Piscataway Creek	020700100305	Piscataway Creek		9	15.1	27.2	0	51.052576	51.3	51.3	93
257	Little Hunting Creek	020700100307	Little Hunting Creek-Potomac River		4.9	1.5	9.4	0	15.749868	15.8	15.8	31
258	Occoquan Bay	020700100805	Occoquan Bay-Potomac River		8.1	4.8	0.2	0	13.029438	13.1	13.1	25
259	Piney Branch	020700110101	Piney Branch-Mattawoman Creek		24.4	9.5	21.4	0	55.21123	55.3	55.3	103
260	Marbury Run	020700110102	Marbury Run-Mattawoman Creek		27.5	7.4	1.8	0	36.631274	36.7	36.7	96
261	Tank Creek	020700110106	Tank Creek-Potomac River	Include Passapatanzy Creek	22.1	4.9	0	0	26.921764	27	27	58
263	Hancock Run	020700110301	Hancock Run-Nanjemoy Creek	Include Chotank Creek	28	4.3	0	0	32.246622	32.3	32.3	52
264	Burgess Creek	020700110302	Burgess Creek-Nanjemoy Creek		41.7	9.1	0	0	50.65541	50.8	50.8	120
265	Port Tobacco River	020700110304	Port Tobacco River		40.9	4.2	0	0	44.941455	45.1	45.1	115
266	Gambo Creek	020700110305	Gambo Creek-Potomac River		11.1	2	0	0	13.005859	13.1	13.1	29
267	Piccowaxen Creek	020700110306	Piccowaxen Creek-Frontal Potomac River		10.9	5	0	0	15.804129	15.9	15.9	32
268	Jordan Swamp-Zekiah Swamp Run	020700110401	Jordan Swamp-Zekiah Swamp Run		39	13.5	0	0	52.401711	52.5	52.5	86
269	Kerrick Swamp-Zekiah Swamp Run	020700110402	Kerrick Swamp-Zekiah Swamp Run		12.4	11.1	0	0	23.63378	23.5	23.5	60
270	Clark Run-Zekiah Swamp Run	020700110403	Clark Run-Zekiah Swamp Run		22.2	16.8	0	0	38.868016	39	39	113
271	Newport Run	020700110501	Newport Run		44	1.8	0	0	45.693696	45.8	45.8	115
272	Budds Creek	020700110502	Budds Creek-Wicomico River		11.6	2.8	0	0	14.23718	14.4	14.4	35
273	Chaptico Creek	020700110503	Chaptico Creek		31.1	9.2	0	0	40.230205	40.3	40.3	123
274	Charleston Creek	020700110504	Charleston Creek-Wicomico River	Include Whites Neck Creek	14.2	8.9	0	0	23.018754	23.1	23.1	49
275	St. George Island	St. George Island	St. George Island		0	0.9	0	0	0.848883	0.9	0.9	5
276	Saint Clements Creek-Frontal Potomac RIver	020700110701	Saint Clements Creek-Frontal Potomac RIver		35.3	11.4	0	0	46.617051	46.7	46.7	111
277	McIntosh Run	020700110702	McIntosh Run		26.5	12.2	0	0	38.573987	38.7	38.7	107
278	Glebe Run-Breton Bay	020700110703	Glebe Run-Breton Bay		13	5	0	0	17.955333	18	18	50
279	Poplar Hill Creek	020700110704	Poplar Hill Creek-Frontal Potomac River		14.4	8.7	0	0	22.955704	23.1	23.1	44
280	Western Branch Saint Marys River	020700110901	Western Branch Saint Marys River-Saint Marys River	PILOT WATERSHED	17.6	15	0	0	32.481607	32.6	32.6	78
281	Eastern Branch Saint Marys River	020700110902	Eastern Branch-Saint Marys River		17.2	13.5	0	0	30.686235	30.7	30.7	70
282	Saint George Creek	020700110903	Saint George Creek-Saint Marys River		5.8	5.4	0	0	11.109824	11.2	11.2	9
283	Jutland Creek	020700110904	Jutland Creek-Frontal Potomac River		6.6	7.7	0	0	14.15913	14.3	14.3	18
284	Newtowne Neck	Newtowne Neck	Newtowne Neck		0.7	0.6	0	0	1.197679	1.3	1.3	1
285	Charles Creek-Honga River	Hoopersville			0	4.2	0	0		4.1	4.1	14
286	Nanticoke River	020801090405	Butler Mill Branch-Nanticoke River	Include Gales Creek	0.8	26.9	0	395.1	27.601274	422.8	27.7	746
287	Chicone Creek	020801090501	Chicone Creek-Nanticoke River	Include Barren Creek	40.3	30	0	8.7	70.165642	79	70.3	237
288	Rewastico Creek	020801090502	Rewastico Creek		21.1	4.9	0	0	25.840926	26	26	46
289	Quantico Creek	020801090503	Quantico Creek		18	6.6	0	0	24.457804	24.6	24.6	40
291	Middletown Branch-Transquaking River	020801100101	Middletown Branch-Transquaking River		30.9	28.2	0	0	59.064715	59.1	59.1	107
292	Chicamacomico River	020801100102	Chicamacomico River		0	55	0	0	54.922032	55	55	115
293	Blackwater River	020801100201	Buttons Creek-Blackwater River	Include Little Blackwater and Coles Creek	31.4	75.8	0	0	107.101823	107.2	107.2	209
295	North Prong Wicomico River	020801100301	North Prong Wicomico River		20.9	18	0	0	38.802424	38.9	38.9	45
296	South Prong Wicomico River	020801100302	South Prong Wicomico River		12.9	10.4	0	0	23.150314	23.3	23.3	30
297	Tonytank Creek	020801100303	Tonytank Creek-Wicomico River		11	18.1	0	0	29.005974	29.1	29.1	38
298	Wicomico Creek	020801100304	Wicomico Creek	Include Shiles Creek, Monie Bay, and Ellis Bay	62.5	62.2	0	0	124.631926	124.7	124.7	316
299	Kings Creek	020801100401	Kings Creek	Include Back Creek and Taylor Branch	41.8	32.8	0	0	74.502984	74.6	74.6	96
300	Broad Creek-Manokin River	020801100404	Broad Creek-Manokin River	Include Deal Island	0	30.7	0	0	30.673891	30.7	30.7	112
301	Big Annemessex River	020801100405	Big Annemessex River		6.4	26.8	0	0	33.108993	33.2	33.2	93
302	Little Annemessex River	020801100601	Little Annemessex River-Tangier Sound		0	6.4	0	0	6.344789	6.4	6.4	13
303	Upper Nassawango Creek	020801110101	Upper Nassawango Creek		36.7	0	0	0	36.618556	36.7	36.7	44
304	Lower Nassawango Creek	020801110102	Lower Nassawango Creek		18.4	14.7	0	0	33.017797	33.1	33.1	62
305	Careytown and Whaleyville Branches -Pocomoke River	020801110201	Careytown Branch-Pocomoke River	Include Whaleyville Branch	20.2	43.2	0	35.4	63.309492	98.8	63.4	157
306	Ninepin Branch-Pocomoke River	020801110203	Ninepin Branch-Pocomoke River		55.7	0	0	0	55.632716	55.7	55.7	98
307	Old Mill Branch-Pocomoke River	020801110204	Old Mill Branch-Pocomoke River		30.2	0	0	0	30.124852	30.2	30.2	51
308	Purnell Branch-Pocomoke River	020801110205	Purnell Branch-Pocomoke River		30.5	1	0	0	31.420509	31.5	31.5	66
309	Dividing Creek	020801110301	Dividing Creek		60.1	2.4	0	0	62.443177	62.5	62.5	104
310	Corkers Creek	020801110302	Corkers Creek		57.3	0	0	0	57.301038	57.3	57.3	105
311	Cypress Swamp-Pocomoke River	020801110303	Cypress Swamp-Pocomoke River	Include Bullbegger Creek	26.2	21.2	0	0	47.346758	47.4	47.4	112
312	Marumsco Creek-Pocomoke Sound	020801110501	Marumsco Creek-Pocomoke Sound	Include East Creek and the Prong	6.4	50.8	0	0	57.037109	57.2	57.2	173
313	Marshyhope Creek	020801090302	Saulsbury Creek-Marshyhope Creek	Include Tommy Wright Branch, Sullican Branch, Faulkner Branch, Puckum Branch, and Story Bar Creek	58	65.2	0	96.7	123.133678	219.9	123.2	492

Sheet4

Hidden Unit Key	name *	Governmental Entities	Low (mi2)	Medium (mi2)	Detailed (mi2)	Out of State (mi2)	Notes	Land Area within MD (mi2)	Land Area within MD minus V and VE zone (mi2)	Stream Length (mi)	Region	Modeling HUC 12 *	Contingent Watershed Modeling Unit
0	Pitts Creek	Worcester/POCOMOKE CITY	0	0	0		Exclude				Atlantic Coastal Plain	20801110401
0	Assateague Island-Atlantic Ocean	Worcester	0	0	0		Exclude				Atlantic Coastal Plain	20403030603
0	Upper Christina River	Cecil/ELKTON	0	0	0		Exclude				Piedmont	20402050502
0	Fenwick Island-Atlantic Ocean		0	0	0		Exclude				Atlantic Coastal Plain	20403030602
0	Upper Tangier Sound	Dorchester	0	0	0		Exclude				Atlantic Coastal Plain	20801100503
0	Eastern Bay	Queen Anne's,Talbot	0	0	0		Exclude				Atlantic Coastal Plain	20600020609
0	Holland Straits-Frontal Chesapeake Bay	Dorchester,Somerset	0	0	0		Exclude				Atlantic Coastal Plain	20600050605
0	Beaverdam Run-Broad Run	Montgomery	0	0	0		Exclude				Piedmont	20700080903
0	Lake Marburg-West Branch Codorus Creek	Carroll	0	0	0		Exclude				Piedmont	20503060701
0	Pimmit Run-Potomac River	Montgomery	0	0	0		Exclude				Piedmont	20700100103
0	Headwaters South Branch Conewago Creek	Carroll	0	0	0		Exclude				Piedmont	20503060101
0	Smith Island	Somerset	0	0	0		Exclude				Atlantic Coastal Plain	20801100602
0	Muddy Run	Cecil/ELKTON	0	0	0		Exclude				Atlantic Coastal Plain	20402050501
0	Kedges Straits-Tangier Sound	Dorchester,Somerset	0	0	0		Exclude				Atlantic Coastal Plain	20801100502
0	Fishing Creek-Muddy Creek	Harford	0	0	0		Exclude				Piedmont	20503061304
0	Whites Creek	Garrett	0	0	0		Exclude				Appalachian Plateaus	50200060708
0	Fike Run-Little Sandy Creek	Garrett	0	0	0		Exclude				Appalachian Plateaus	50200040601
0	Assateague Island 1	Worcester	0	0	0		Exclude				Atlantic Coastal Plain	20403030402
0	Assateague Island 2	Worcester	0	0	0		Exclude				Atlantic Coastal Plain	20403030403
0	Assateague Island 3	Worcester	0	0	0		Exclude				Atlantic Coastal Plain	20403030501
1	Upper Savage River	Allegany,Garrett	46.234603	0	0	0		46.234603	46.234603	83.839409	Appalachian Plateaus	20700020101	1
2	Crabtree Creek	Garrett	17.334596	0	0	0		17.334596	17.334596	24.870281	Appalachian Plateaus	20700020102	1
3	Lower Savage River	Allegany,Garrett	0	52.077167	0	0		52.077167	52.077167	86.896715	Appalachian Plateaus	20700020103	2
4	Shields Run	Garrett	21.167796	0	0	19.752937		21.167796	21.167796	65.289758	Appalachian Plateaus	20700020201	1
5	Buffalo Creek	Garrett	0	21.279471	0	22.775761		21.279471	21.279471	70.838471	Appalachian Plateaus	20700020203	1
6	Lostland Run	Garrett/KITZMILLER	0	32.462813	0	9.355525		32.462813	32.462813	63.413511	Appalachian Plateaus	20700020205	1
7	Bloomington Lake-North Branch Potomac River		0	16.142596	0	17.939423		16.142596	16.142596	46.272435	Appalachian Plateaus	20700020206	1
8	Piney Swamp Run	Allegany,Garrett/LUKE,WESTERNPORT	0	14.8052	0	13.38612		14.8052	14.8052	38.373002	Appalachian Plateaus	20700020207	3
9	Upper Georges Creek	Allegany,Garrett/FROSTBURG,LONACONING,MIDLAND	0	37.596085	0	0		37.596086	37.596086	56.892755	Appalachian Plateaus	20700020301	1
10	Lower Georges Creek	Allegany,Garrett/BARTON,LONACONING,WESTERNPORT	0	36.538206	0	0		36.538206	36.538206	50.342101	Appalachian Plateaus	20700020302	2
11	Limestone Run	Allegany/WESTERNPORT	20.419308	0.232021	0	20.572771		20.651329	20.651329	76.313286	Appalachian Plateaus	20700020402	1
12	Jennings Run	Allegany,Garrett/FROSTBURG	27.949503	1.032727	0	8.956525		28.982229	28.982229	60.003968	Appalachian Plateaus	20700020505	1
14	Cherry Creek	Garrett	16.744274	0	0	0		16.744274	16.744274	27.524653	Appalachian Plateaus	50200060102	1
15	Rhine Creek	Garrett/OAKLAND	12.874819	0.00023	0	63.689667		12.875049	12.875049	142.551532	Appalachian Plateaus	50,200,060,103,050,200,000,000,000,000,000,000	2
16	Little Youghiogheny River	Garrett/DEER PARK,LOCH LYNN HEIGHTS,MOUNTAIN LAKE PARK,OAKLAND	0	40.830701	0	0		40.830701	40.830701	74.1	Appalachian Plateaus	50200060104	1
17	Muddy Creek	Garrett	8.588338	0	0	9.192406		8.588338	8.588338	27.488677	Appalachian Plateaus	50200060106	1
18	Herrington Run	Garrett/OAKLAND	0	31.248484	0	1.702342		31.248484	31.248484	61.525095	Appalachian Plateaus	50200060107	3
19	Deep Creek lake	Garrett	0.000001	64.034692	0	0		64.034693	64.034693	87.293815	Appalachian Plateaus	50,200,060,202,050,200,000,000	1
21	Salt Block Run	Garrett/FRIENDSVILLE	0.00001	42.809221	0	4.57599		42.809231	42.809231	75.105281	Appalachian Plateaus	50200060301	4
22	Bear Creek	Garrett/ACCIDENT	0	49.352755	0	0		49.352755	49.352755	75.92908	Appalachian Plateaus	50200060302	1
24	Mill Run	Garrett	14.120058	0	0	3.557522		14.120058	14.120058	23.746585	Appalachian Plateaus	50200060304	1
25	Youghiogheny River Lake	Garrett/FRIENDSVILLE	26.45668	0	0	5.136465		26.45668	26.45668	53.836084	Appalachian Plateaus	50,200,060,305,050,200,000,000	5
26	Red Run-Piney Creek	Garrett	0	20.017159	0	4.009784		20.017159	20.017159	38.184308	Appalachian Plateaus	50200060403	1
27	Casselman River Headwaters	Garrett/GRANTSVILLE	0	71.496271	0	26.992504		40.830701	40.830701	131.211682	Appalachian Plateaus	50,200,060,405,050,200,000,000,000,000,000,000	1
29	Wills Creek	Allegany/CUMBERLAND,FROSTBURG	0	30.439281	0	184.421031		30.439281	30.439281	435.465842	Appalachian Plateaus	20,700,020,506,020,700,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000	2
30	Mill Run - Potomac	Allegany/CUMBERLAND	0	35.874203	0	7.862072		35.874203	35.874203	95.283231	Ridge and Valley, and Blue Ridge	20700020403	1
31	Evitts Creek	Allegany/CUMBERLAND	0	30.999474	0	63.336718		30.999474	30.999474	228.241652	Ridge and Valley, and Blue Ridge	20,700,020,602,020,700,000,000,000,000,000,000	1
32	Collier Run		0	21.604972	0	9.149555		21.604972	21.604972	54.914036	Ridge and Valley, and Blue Ridge	20700020801	2
33	Mill Run	Allegany	21.728309	0	0	0		21.728309	21.728309	58.021099	Ridge and Valley, and Blue Ridge	20700020802	1
34	Green Spring Run	Allegany	15.563243	0	0	25.542397		15.563243	15.563243	95.252674	Ridge and Valley, and Blue Ridge	20700020803	2
35	Flintstone Creek	Allegany	12.670352	0	0	88.965545		12.670352	12.670352	253.589518	Ridge and Valley, and Blue Ridge	20,700,030,101,020,700,000,000,000,000,000,000	1
36	Murley Branch	Allegany	12.328997	0	0	0		12.328997	12.328997	32.586198	Ridge and Valley, and Blue Ridge	20700030103	1
37	Peters Run	Allegany	19.941668	0	0	0		19.941668	19.941668	57.030524	Ridge and Valley, and Blue Ridge	20700030105	2
38	Sawpit Creek	Allegany	0	23.031795	0	0		23.031795	23.031795	67.215244	Ridge and Valley, and Blue Ridge	20700030106	3
39	Upper Fifteenmile Creek	Allegany	24.621112	0	0	11.975716		24.621112	24.621112	109.485669	Ridge and Valley, and Blue Ridge	20700030301	1
40	Lower Fifteenmile Creek	Allegany	25.167673	0	0	0		25.167673	25.167673	72.082348	Ridge and Valley, and Blue Ridge	20700030302	2
41	Crooked Run	Allegany,Washington	10.433147	0	0	72.561271		10.433147	10.433147	229.700425	Ridge and Valley, and Blue Ridge	20,700,030,404,020,700,000,000,000,000,000,000,000,000,000,000	1
42	Bear Creek-Sideling Hill Creek	Allegany,Washington	13.211588	0	0	7.733353		13.211588	13.211588	62.665719	Ridge and Valley, and Blue Ridge	20700030405	2
43	Purslane Run	Allegany	0	15.224115	0	9.386603		15.224115	15.224115	65.54175	Ridge and Valley, and Blue Ridge	20700030801	4
44	Rockwell Run	Allegany	0	16.466159	0	25.664885		16.466159	16.466159	118.638996	Ridge and Valley, and Blue Ridge	20700030802	1
45	Willett Run	Allegany,Washington	0	11.020852	0	14.660405		11.020852	11.020852	67.889945	Ridge and Valley, and Blue Ridge	20700030803	3
46	Ditch Run	Washington/HANCOCK	0	15.701959	0	121.397639		15.701959	15.701959	398.111157	Ridge and Valley, and Blue Ridge	20,700,040,101,020,700,000,000,000,000,000,000	1
47	Lanes Run-Licking Creek	Washington	0	23.932904	0	223.04152		23.932904	23.932904	667.515052	Ridge and Valley, and Blue Ridge	20,700,040,305,020,700,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000	1
48	Minnow Run-Little Tonoloway Creek	Washington/HANCOCK	0	15.477838	0	9.716558		15.477838	15.477838	64.691054	Ridge and Valley, and Blue Ridge	20700040501	1
49	Sir Johns Run	Washington/HANCOCK	0	8.664761	0	12.17315		8.664761	8.664761	43.868873	Ridge and Valley, and Blue Ridge	20700040502	1
50	Cherry Run	Washington	13.278032	0	0	14.908109		13.278032	13.278032	69.131586	Ridge and Valley, and Blue Ridge	20700040505	2
51	Conococheague Creek	Washington/HAGERSTOWN,WILLIAMSPORT	0	65.556237	0	468.393408		65.556237	65.556237	1172.890687	Ridge and Valley, and Blue Ridge	20,700,040,806,020,700,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000	1
52	Little Antietam Creek	Frederick,Washington/SMITHSBURG	24.676746	0	0	0		24.676746	24.676746	50.447594	Ridge and Valley, and Blue Ridge	20700041004	1
53	West Branch Marsh Run	Washington/HAGERSTOWN	9.231612	3.82961	0	18.663639		13.061222	13.061222	36.643789	Ridge and Valley, and Blue Ridge	20700041005	1
54	Antietam Creek	Washington	0	17.370167	0	94.287432		17.370167	17.370167	184.719662	Ridge and Valley, and Blue Ridge	20,700,041,006,020,700,000,000,000,000,000,000,000,000,000,000	2
55	Beaver Creek	Frederick,Washington/SMITHSBURG	33.589864	0	0	0		33.589864	33.589864	68.884019	Ridge and Valley, and Blue Ridge	20700041007	1
56	Dog Creek-Little Antietam Creek	Frederick,Washington/BOONSBORO,KEEDYSVILLE	31.924937	0	0	0		31.924937	31.924937	57.109707	Ridge and Valley, and Blue Ridge	20700041008	1
57	Sharmans Branch-Antietam Creek	Washington/FUNKSTOWN,HAGERSTOWN,SHARPSBURG	0	57.218354	0	0		57.218354	57.218354	102.0347	Ridge and Valley, and Blue Ridge	20700041009	3
59	Little Conococheague Creek	Washington/CLEAR SPRING	0	16.692469	0	1.374813		16.692469	16.692469	40.683676	Ridge and Valley, and Blue Ridge	20700041102	1
60	Camp Spring Run	Washington/CLEAR SPRING,WILLIAMSPORT	25.224809	0.702484	0	22.293739		25.927292	25.927292	81.38912	Ridge and Valley, and Blue Ridge	20700041103	2
61	Saint James Run-Marsh Run	Washington/HAGERSTOWN	0	21.020217	0	0		21.020217	21.020217	25.663974	Ridge and Valley, and Blue Ridge	20700041104	1
62	Rattlesnake Run	Washington	0	25.997569	0	30.177709		25.997569	25.997569	57.867115	Ridge and Valley, and Blue Ridge	20700041106	2
64	Harpers Ferry		0	12.641831	0	7.890821		12.641831	12.641831	37.304686	Ridge and Valley, and Blue Ridge	20700041108	1
66	Upper Catoctin Creek	Frederick,Washington/MYERSVILLE	33.631064	0	0	0		33.631064	33.631064	55.476988	Ridge and Valley, and Blue Ridge	20700080101	1
67	Middle Catoctin Creek	Frederick,Washington/MIDDLETOWN,MYERSVILLE	0	50.073365	0	0		50.073365	50.073365	118.243702	Ridge and Valley, and Blue Ridge	20700080102	2
68	Lower Catoctin Creek	Frederick,Washington/BURKITTSVILLE	36.832818	0	0	0		36.832818	36.832818	94.288236	Ridge and Valley, and Blue Ridge	20700080103	3
69	Israel Creek	Frederick,Washington/BRUNSWICK,ROSEMONT	0	15.368559	0	15.821188		15.368559	15.368559	68.431172	Ridge and Valley, and Blue Ridge	20700080201	1
70	Piney Run	Frederick,Washington/BRUNSWICK,ROSEMONT	0	22.096392	0	21.412155		22.096392	22.096392	108.919017	Ridge and Valley, and Blue Ridge	20700080202	4
71	Owens Creek	Frederick,Washington/THURMONT	39.742918	0	0	0		39.742918	39.742918	75.295992	Ridge and Valley, and Blue Ridge	20700090504	1
72	Little Hunting Creek-Big Hunting Creek	Frederick/THURMONT	41.679601	0	0	0		41.679601	41.679601	76.220464	Ridge and Valley, and Blue Ridge	20700090505	1
74	Octoraro Creek	Cecil/RISING SUN	0	34.747082	0	175.595729		34.747082	34.747082	375.680407	Piedmont	20,503,061,502,020,500,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000	1
75	Headwaters Deer Creek	Baltimore,Harford	0	31.645971	0	21.610012		31.645971	31.645971	106.501717	Piedmont	20503061601	1
76	Upper Deer Creek	Harford	0	35.019483	0	3.752007		35.019483	35.019483	65.190925	Piedmont	20503061602	2
77	Middle Deer Creek	Harford	0	38.002003	0	0		38.002003	38.002003	63.993791	Piedmont	20503061603	3
78	Lower Deer Creek	Harford	0	40.854391	0	0		40.854391	40.854391	77.333511	Piedmont	20503061604	4
79	Broad Creek	Harford	39.586682	0	0	0.676422		39.586682	39.586682	60.09563	Piedmont	20503061710	1
80	Conowingo Dam-Susquehanna River	Cecil,Harford	0	23.346236	0	37.817698		23.346236	23.346236	98.176167	Piedmont	20,503,061,711,020,500,000,000	2
81		Cecil,Harford/HAVRE DE GRACE,PERRYVILLE,PORT DEPOSIT	0	28.03765	0	0		30.489335	28.03765	42.091037	Piedmont	20503061713	5
82	Little North East Creek	Cecil/NORTH EAST	18.313029	0	0	0.461087		18.313029	18.313029	34.160107	Piedmont	20600020101	1
83	North East Creek	Cecil/NORTH EAST,RISING SUN	29.690276	0	0	7.562809		29.690276	29.690276	75.704652	Piedmont	20600020102	2
84	Mill Creek-Furnace Bay	Cecil/PERRYVILLE,PORT DEPOSIT,RISING SUN	26.780629	0	0	0		27.919886	26.780629	46.03498	Piedmont	20600020103	1
85	Little Elk Creek	Cecil/ELKTON	27.296588	2.398571	0	12.402244		29.695159	29.695159	87.72982	Piedmont	20600020202	1
86	Upper Winters Run	Harford/BEL AIR	0	36.211109	0	0		36.211109	36.211109	62.027815	Piedmont	20600030101	1
87	Lower Winters Run	Harford/BEL AIR	0	19.197661	0	0		19.197661	19.197661	39.655664	Piedmont	20600030102	2
88	Bynum Run-Bush Creek	Harford/BEL AIR	0	35.439154	0	0		35.439154	35.439154	63.211018	Piedmont	20600030103	1
89	Church Creek-Bush River	Harford/ABERDEEN	6.48807	8.743028	0	0		15.231098	15.231098	39.365205	Piedmont	20600030104	1
90	Swan Creek-Frontal Chesapeake Bay	Harford/ABERDEEN,HAVRE DE GRACE	0.000228	27.401584	0	0		28.569865	27.401812	53.99066	Piedmont	20600030201	1
91	South Branch Gunpowder Falls-Gunpowder Falls	Baltimore,Carroll/MANCHESTER	0	24.138671	0	6.947564		24.138671	24.138671	68.781466	Piedmont	20600030301	1
92	Prettyboy Reservoir-Gunpowder Falls	Baltimore,Carroll/HAMPSTEAD,MANCHESTER	0	48.668769	0	0		48.668769	48.668769	101.859598	Piedmont	20600030302	2
93	Little Falls	Baltimore,Harford	0	49.807138	0	4.169191		49.807138	49.807138	107.325856	Piedmont	20600030401	1
94	Piney Creek-Gunpowder Falls	Baltimore	0	48.280883	0	0		48.280883	48.280883	90.279465	Piedmont	20600030402	3
95	Piney Run-Western Run	Baltimore,Carroll/HAMPSTEAD	0	19.567301	0	0		19.567301	19.567301	49.35632	Piedmont	20600030403	1
96	Blackrock Run-Western Run	Baltimore	0	44.07293	0	0		44.07293	44.07293	100.276986	Piedmont	20600030404	2
97	Beaverdam Run	Baltimore	0	5.278083	16.708565	0		21.986649	21.986649	36.837732	Piedmont	20600030405	3
98	Loch Raven Reservoir-Gunpowder Falls	Baltimore	0	25.300459	11.22923	0		36.52969	36.52969	51.719315	Piedmont	20600030406	4
99	Little Gunpowder Falls	Baltimore,Harford	0	58.255254	0	0		58.255254	58.255254	106.45931	Piedmont	20600030501	1
100	Long Green Creek-Gunpowder Falls	Baltimore,Harford	0	31.676993	14.588666	0		46.265659	46.265659	83.4053	Piedmont	20600030502	5
101	Redhouse Creek-Back River	Baltimore,Baltimore City/BALTIMORE CITY	0	0	31.275665	0		31.275665	31.275665	40.960509	Piedmont	20600030702	1
102	East Branch North Branch Patapsco River	Carroll/HAMPSTEAD,MANCHESTER	20.944006	0	0	0		20.944006	20.944006	48.010907	Piedmont	20600030801	1
103	Headwaters North Branch Patapsco River	Carroll/WESTMINSTER	0	20.588197	0	0		20.588197	20.588197	48.411629	Piedmont	20600030802	1
104	Beaver Run-Liberty Lake	Carroll/WESTMINSTER	0	16.109327	0	0		16.109327	16.109327	39.233354	Piedmont	20600030803	1
105	Morgan Run-Liberty Lake	Carroll	0	44.391662	0	0		44.391662	44.391662	105.462225	Piedmont	20600030804	1
106	Deep Run-North Branch Patapsco River	Baltimore,Carroll/HAMPSTEAD	0	45.844855	0	0		45.844855	45.844855	101.603175	Piedmont	20600030805	2
107	Falls Run-North Branch Patapsco River	Baltimore,Carroll	0	22.431926	0	0		22.431926	22.431926	46.536111	Piedmont	20600030806	3
108	Red Run-Gwynns Falls	Baltimore	0	1.965932	15.824732	0		17.790664	17.790664	34.691251	Piedmont	20600030901	1
109	Dead Run-Gywnns Falls	Baltimore,Baltimore City/BALTIMORE CITY	0	0.001072	49.140013	0		49.141085	49.141085	78.996122	Piedmont	20600030902	2
110	Gillis Falls	Carroll/MOUNT AIRY	19.263871	0	0	0		19.263871	19.263871	47.097091	Piedmont	20600031001	1
111	Hay Meadow Branch-South Branch Patapsco River	Carroll,Frederick,Howard,Montgomery/MOUNT AIRY	19.981026	3.083331	0	0		23.064357	23.064357	59.502717	Piedmont	20600031002	2
112	Piney Run	Carroll/SYKESVILLE	0	18.393305	0	0		18.393305	18.393305	43.252873	Piedmont	20600031003	1
113	Piney Branch-South Branch Patapsco River	Carroll,Howard/SYKESVILLE	23.325874	1.800358	0	0		25.126232	25.126232	68.391595	Piedmont	20600031004	3
114	Brice Run-Patapsco River	Baltimore,Carroll,Howard	0	17.297429	29.096297	0		46.393726	46.393726	103.309733	Piedmont	20600031101	4

This is the start of the file's text. The full file is on GovTribe.

File details come from the government source that posted it. Updated Feb 18, 2026.