Black Branch 2

Small headwater stream flowing through agricultural/rural residential landscape. Turbid brown water with silt-dominated substrate indicates sediment impairment likely from adjacent agricultural land use and minimal riparian buffers. Stream appears to support basic aquatic life functions but is clearly impacted.

Channel appears natural without structural alteration; however, the channel is narrow with some bank erosion and the adjacent land use (agriculture, pasture) has likely influenced channel form. No channelization or armoring present. Some lateral erosion visible but not excessive. Channel maintains floodplain connection. Score between 5-7 range due to minor impacts from surrounding land use.

The stream shows slight incision with banks 2-3 feet in height near the surveyor but maintains some floodplain connectivity. The low banks in some areas suggest the stream can access its floodplain during higher flow events. No dams or major structures visible. Agricultural land use may have slightly altered hydrology through increased runoff.

The turbid brown water and silt-dominated substrate indicate significant fine sediment loading from surrounding agricultural land. The bed appears to be heavily silted with little visible coarser substrate except in the upstream view. Sediment deposition is likely affecting 30-50% of the channel bottom. Pool habitat appears to be filled or reduced by sediment.

The narrow, shallow channel appears dominated by slow-shallow flow with some fast-shallow areas visible upstream where gravel substrate creates minor riffles. No deep water observed. Only 2 velocity-depth regimes appear present.

Water is present and flowing but does not fill the full channel width. The down face shows the surveyor standing in shallow flow that appears to fill roughly 50-75% of the channel cross-section. Some exposed banks and substrate visible along edges.

The upstream view shows some gravel substrate suggesting occasional riffle development, but the overall channel appears dominated by uniform shallow flow with limited riffle-pool differentiation. For a low-gradient stream this is expected, but habitat variety is limited.

This appears to be a small headwater stream in an agricultural setting with characteristics somewhat between Rosgen E and C types. The narrow channel with moderate sinuosity through a broad valley is consistent with E-type but the silt-dominated bed and agricultural impacts obscure the natural form. The stream may have been historically straightened and is recovering. Low confidence in classification due to the heavily impacted condition.

The left bank (visible in the left face looking downstream, which shows the right bank from the camera position - the left bank when facing downstream is visible in the right face) has very limited riparian protection. The right-face image shows grass extending to the bank edge with minimal root protection. Banks are low to moderate height. Some erosion present but not severe. The mowed/grazed pasture extends nearly to the channel edge reducing bank stability.

The left bank (right face image) shows predominantly grass and dormant herbaceous vegetation extending to the stream edge. No trees or shrubs provide root protection at the bank face. Vegetation is limited to grass cover which provides inadequate bank protection. Bare soil patches visible at bank edge. Coverage approximately 50-60%.

Left bank lacks adequate riparian buffer. Mowed/grazed pasture extends to within a few feet of channel edge. Grass provides minimal root depth for bank stabilization. Agricultural runoff enters stream directly from this side.

The right bank (visible in left face) shows moderate to steep banks with a narrow strip of trees providing some root stabilization. Some undercutting and erosion visible. Bank heights appear 3-6 feet in places. Tree roots provide partial protection but are insufficient to fully stabilize the bank. Agricultural field beyond the thin tree line contributes to hydrology issues.

Right bank has a thin strip of trees and shrubs providing partial cover. During leaf-off conditions about 50-70% of bank face appears protected by root structure and dormant vegetation. Some invasive vines (possibly Japanese honeysuckle) noted in dormant state. Better protected than the left bank due to tree presence, but coverage is still insufficient.

Right bank has a thin corridor of trees providing marginally better protection than the left bank. Undercutting visible at base in some areas. Agricultural field extends beyond the narrow tree line.

The left bank (visible in right face) shows essentially no woody riparian buffer. Mowed grass and dormant herbaceous weeds extend to the bank edge with no trees or shrubs. The buffer is less than 5 feet of herbaceous vegetation, far below the 0.33x channel width threshold. Filtering and shading function is severely compromised.

Right bank has a narrow strip of trees approximately 10-20 feet wide with scattered deciduous trees and one or two eastern red cedars. This provides some filtering but is insufficient for full ecological function. Width is approximately 0.33-0.5x the channel width area. Agricultural fields begin immediately beyond this thin corridor.

The floodplain on the left side is actively grazed/mowed pasture with no natural vegetation. The right side has a very thin strip of trees but the broader floodplain is agricultural cropland. Most trees and shrubs have been removed from the floodplain. Vegetation is clearly not in a natural state.

With winter leaf-off and the sparse tree cover, canopy shade is well below 25%. Even during full leaf-on conditions, shade would be limited to perhaps 25-40% due to the very thin riparian corridor on only one side. Currently <15% shade.

Both banks fail to meet TDEC MS4 minimum 30ft buffer requirements. Left bank is the most critical with pasture/mowing extending to the stream edge. Right bank has partial tree cover but is insufficient. Buffer restoration through fencing and planting would significantly improve water quality and habitat. This is a priority for MS4 compliance under section 4.2.5.4.

Very limited favorable substrate for macroinvertebrate colonization. The silt-dominated bed provides poor habitat. Some undercut banks and exposed root systems on the right bank offer limited colonization surfaces, but these make up perhaps 20-30% of available habitat. No cobble, logs, or significant woody debris observed in the channel.

The substrate is dominated by mud and silt with heavy fine sediment deposition. Some gravel visible in the upstream view but largely embedded. Some root mats present along the right bank but limited. Overall the bed is heavily embedded with fine agricultural sediment.

The downstream view shows what appears to be a small pool area, but it is very shallow. The turbid water makes exact depth assessment difficult but the surveyor is standing in shallow water suggesting depths well under 1 foot in most areas. Pools appear shallow and likely filled with sediment. No deep pools visible.

Limited fish cover available. Some undercut banks visible on the right bank, overhanging dormant vegetation, and minor root mats. No logs, deep pools, boulders, cobble, macrophyte beds, or significant backwater areas observed. Only 3 cover types present.

No barriers to fish movement visible within this reach. However, as scene 44 of 53 (85% through reach), there may be culverts or other barriers elsewhere. Low flow conditions during dry periods could potentially limit fish movement in this shallow stream. Score of 8 accounts for potential seasonal low-flow limitations.

Very little large woody debris visible in the channel. The front and back views show a channel largely devoid of logs or significant woody material. A few small twigs and branches are present but no pieces large enough to form pools or provide significant habitat. The thin riparian corridor on the right bank and absence of buffer on the left limit LWD recruitment.

Only 2 types of macroinvertebrate habitat present: minor undercut banks and some coarse gravel visible upstream. The silt-dominated substrate is poor for most intolerant taxa. No leaf packs, submerged logs, or cobble/boulder habitat observed. Substrate appears frequently disturbed by sediment deposition.

Score of 2 based on habitat assessment rather than direct observation. The poor substrate quality, heavy siltation, and limited habitat diversity suggest that any macroinvertebrate community would be dominated by tolerant taxa. The lack of clean cobble/gravel, leaf packs, and woody debris eliminates habitat for most intolerant species.

No macroinvertebrates directly observed in images. Assessment based on habitat quality - the silt-dominated substrate, turbid water, and limited habitat diversity would favor tolerant taxa (Group III) such as midges and aquatic worms if present. Winter conditions and turbidity limit visual detection.

Suitable Habitat: No

The heavily impacted agricultural stream provides minimal habitat for species of concern. The silt-dominated substrate and lack of diverse habitat features limit potential for rare aquatic species. No mussel beds, coldwater fishery, or rare plant habitat observed.

No wildlife directly observed during this winter survey. The surveyor's presence in the channel likely deterred any nearby wildlife. The limited riparian buffer and agricultural land use reduce wildlife habitat quality. The thin tree corridor on the right bank may provide minimal movement corridor for terrestrial wildlife.

Water is turbid with brown coloration consistent with suspended sediment. Visibility appears to be approximately 0.5-1 foot based on the down face view where the bed is barely visible in shallow areas. No oil sheen, foam, or algal mats observed. The turbidity may be partly due to the surveyor's wading disturbance but the overall brown color suggests elevated sediment from recent precipitation and agricultural runoff. Score of 4 between marginal and fair.

No visible algae growth or macrophyte development in the channel. Winter conditions limit biological growth. The brown water color appears to be from suspended sediment rather than nutrient-driven algal blooms. Adjacent agricultural land likely contributes nutrient loading but visual indicators during winter are limited. Score of 6 given the lack of visible enrichment indicators but acknowledging potential seasonal issues.

The left bank appears to be grazed pasture with mowed grass extending to the stream edge, suggesting potential livestock access. No direct evidence of manure in the stream or on banks is visible, but the pasture condition and proximity to the stream suggests livestock may have access. No waste pipes or direct discharges visible. Score of 7 accounts for indirect evidence of pastoral use.

This is a warmwater stream with minimal canopy shade. Even during full leaf-on conditions, the sparse tree cover and one-sided buffer would provide inadequate shading. During summer months, this reach would experience elevated water temperatures. Riparian buffer restoration would significantly improve thermal conditions. No thermal refugia observed. The rural setting has minimal impervious surface thermal impacts.

No active permit violations observed. The primary concerns are chronic riparian buffer deficiency and agricultural runoff rather than specific violations.

Terrestrial Invasives Assessment

Aquatic Invasives Assessment

Identification is very difficult during winter dormancy. The vine growth along the right bank (visible in left face) has growth patterns consistent with Japanese honeysuckle, and some shrub forms along the bank could be bush honeysuckle, but confidence is low due to leaf-off conditions. A growing season survey would provide much better invasive species assessment. Currently invasive presence appears scattered and not dominant.