NHD/Observed fcodes

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Sample areas

Figure 1 shows the areas chosen for sample NHD data in an attempt to capture a wide variety of features. The feature tables were combined for each later, and a count produced of each unique FCode for each layer. Results presented below
NHD FCode count sample areas.png

Line features

Frequency FCode Description
1090 41100 Nonearthen Shore
691 50302 Sounding Datum Line: Positional Accuracy = Definite
292 34306 Dam/Weir: Construction Material = Nonearthen
220 34305 Dam/Weir: Construction Material = Earthen
95 43400 Reef
95 47800 Tunnel
80 36200 Flume
34 50301 Sounding Datum Line: Positional Accuracy = Approximate
13 36900 Gate
7 48300 Wall
1 53301 Special Use Zone Limit: Positional Accuracy = Definite
1 31800 Bridge

FlowLines

Frequency FCode Description
49609 46003 Stream/River: Hydrographic Category = Intermittent
21441 46006 Stream/River: Hydrographic Category = Perennial
19506 55800 Artificial Path
10269 33600 Canal/Ditch
5250 56600 Coastline
4071 46007 Stream/River: Hydrographic Category = Ephemeral
2854 33400 Connector
410 42803 Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = Underground
306 46000 Stream/River
241 42807 Pipeline: Pipeline Type = General Case; Relationship to Surface = Underground
171 42813 Pipeline: Pipeline Type = Siphon
109 42801 Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = At or Near
60 33601 Canal/Ditch: Canal/Ditch Type = Aqueduct
46 42802 Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = Elevated
39 42823 Pipeline: Pipeline Type = Stormwater; Relationship to Surface = Underground
2 42811 Pipeline: Pipeline Type = Penstock; Relationship to Surface = Underground
2 33603 Canal Ditch: Canal Ditch Type = Stormwater
1 42809 Pipeline: Pipeline Type = Penstock; Relationship to Surface = At or Near
1 42800 Pipeline

Areas

Frequency FCode Description
835 36400 Foreshore
373 46006 Stream/River: Hydrographic Category = Perennial
237 40307 Inundation Area: Inundation Control Status = Not Controlled
210 48400 Wash
65 33600 Canal/Ditch
36 44500 Sea/Ocean
18 45500 Spillway
16 34306 Dam/Weir: Construction Material = Nonearthen
10 33601 Canal/Ditch: Canal/Ditch Type = Aqueduct
8 46003 Stream/River: Hydrographic Category = Intermittent
4 40308 Inundation Area: Inundation Control Status = Controlled
4 40309 Inundation Area: Inundation Control Status = Controlled; Stage = Flood Elevation
2 46100 Submerged Stream
2 37300 Hazard Zone
1 45403 Special Use Zone: Special Use Zone Type = Spoil Area; Operational Status = Operational
1 39800 Lock Chamber
1 34305 Dam/Weir: Construction Material = Earthen

Water Bodies

Frequency FCode Description
15904 39004 Lake/Pond: Hydrographic Category = Perennial
5852 39001 Lake/Pond: Hydrographic Category = Intermittent
2827 46600 Swamp/Marsh
346 43607 Reservoir: Reservoir Type = Evaporator
321 43624 Reservoir; Reservoir Type = Treatment
280 39009 Lake/Pond: Hydrographic Category = Perennial; Stage = Average Water Elevation
264 43613 Reservoir: Reservoir Type = Water Storage; Construction Material = Nonearthen
255 43612 Reservoir: Reservoir Type = Sewage Treatment Pond
168 43601 Reservoir: Reservoir Type = Aquaculture
92 36100 Playa
85 43600 Reservoir
58 43623 Reservoir: Reservoir Type = Evaporator; Construction Material = Earthen
33 43606 Reservoir: Reservoir Type = Disposal
25 43610 Reservoir: Reservoir Type = Filtration Pond
24 39012 Lake/Pond: Hydrographic Category = Perennial; Stage = Spillway Elevation
18 43609 Reservoir: Reservoir Type = Cooling Pond
15 37800 Ice Mass
13 39010 Lake/Pond: Hydrographic Category = Perennial; Stage = Normal Pool
7 43619 Reservoir: Construction Material = Nonearthen
6 43604 Reservoir: Reservoir Type = Tailings Pond; Construction Material = Earthen
6 43617 Reservoir: Reservoir Type = Water Storage
3 43621 Reservoir: Reservoir Type = Water Storage; Hydrographic Category = Perennial
3 39005 Lake/Pond: Hydrographic Category = Intermittent; Stage = High Water Elevation
1 43625 Reservoir: Reservoir Type = Disposal; Construction Material = Earthen
1 43618 Reservoir: Construction Material = Earthen

Points

Frequency FCode Description
3104 45800 Spring/Seep
1869 48800 Well
581 44101 Rock: Relationship to Surface = Abovewater
103 36700 Gaging Station
39 45000 Sink/Rise
31 48700 Waterfall
10 44102 Rock: Relationship to Surface = Underwater
7 48500 Water Intake/Outflow
2 43100 Rapids
2 39800 Lock Chamber