Black Branch 2

Small headwater stream in a rural/agricultural setting. The narrow channel with limited riparian buffer on the right bank and adjacent agricultural land suggests potential for sediment and nutrient impacts. The stream appears to support some aquatic life functions but with degraded habitat.

The channel appears largely natural with no visible structural modifications, channelization, or dikes. The channel geometry seems appropriate for this small headwater stream. Some minor bank erosion is present but not indicative of active downcutting. The connection to the adjacent floodplain appears intact. Score of 7 reflects the generally natural condition with minor evidence of lateral instability.

The channel shows slight incision but the banks are generally low (under 3 feet on the right, 3-6 feet on the left). The floodplain appears accessible during moderate flood events. The adjacent mowed grass area on the right likely floods during larger events. No dams or significant flow diversions visible. Agricultural land use may have altered the runoff regime somewhat.

Some fine sediment deposition is visible on the bed, and the slightly turbid water suggests sediment transport. The substrate appears to be a mix of natural limestone gravel and finer sediment. Approximately 10-25% of the bed appears affected by deposition, which is consistent with the agricultural land use setting. Score of 6 reflects moderate sediment influence.

The channel is very shallow throughout with low flow. Only shallow regimes are present — slow-shallow in the pooled areas and fast-shallow in the runs. No deep habitats are visible. The channel is too narrow and shallow to support deep regimes under current flow conditions.

Water is present and flowing but does not fill the entire channel width. Exposed substrate is visible along the margins, particularly on the right side. The flow appears to occupy roughly 50-75% of the bankfull channel width. This is consistent with low-flow/baseflow conditions.

The channel shows mostly runs with some riffle-like features where water flows over exposed rock. Riffle development is limited by the low gradient and shallow flow, but some habitat variability exists. Score of 5 reflects moderate riffle frequency.

This is a very small headwater stream with low gradient and a narrow, slightly sinuous channel. The substrate is dominated by gravel-sized limestone/shale fragments. The channel is slightly entrenched on the left bank but has good floodplain access on the right. The Rosgen type is estimated as E-type (low gradient, narrow and deep relative to width) but confidence is low due to the limited view and very small stream size. Could also be classified as a B or C type depending on gradient measurements. The stream appears to be in a transitional agricultural landscape with some natural channel features preserved.

The left bank is moderately high (3-6 feet in places) and steep. Large mature trees provide some root stabilization, but exposed roots and rocky bank faces indicate active erosion processes. Some undercutting is evident. The mature tree roots protect portions of the bank but not consistently to baseflow elevation. Score of 5 reflects moderate stability with some erosion concerns.

The left bank has moderate vegetative cover from mature trees and understory shrubs, estimated at 60-75%. During the growing season, coverage would likely increase. The bare dormant condition currently shows exposed soil and rock. Native species appear dominant with some vining invasives possible. The thin riparian strip transitions quickly to open agricultural land.

The left bank features a narrow riparian corridor with mature hardwood trees (possible walnut or hackberry). The bank is steeper than the right bank and shows signs of active erosion with exposed rock and root exposure. The riparian buffer is very narrow, transitioning quickly to open agricultural/pastoral land visible in the left face view.

The right bank is lower (under 3 feet) with a gradual to moderate slope. The mowed grass extends nearly to the bank edge with minimal woody vegetation buffer. The bank appears stable at the surface but lacks the deep root systems that would provide long-term protection. The absence of significant riparian woody vegetation makes this bank vulnerable to erosion during high flows. Some bare soil and sparse vegetation along the bank edge suggest minor active erosion.

The right bank has grass cover extending to near the bank edge, but minimal woody vegetation or deep-rooted species are present. Estimated coverage is 50-65% considering the sparse herbaceous/grass cover near the channel edge and the lack of trees or shrubs directly on the bank. The mowed grass provides some surface protection but not the deep root structure needed for bank stability. Score of 4 reflects the dominance of grass with limited deeper-rooted riparian vegetation.

The right bank is characterized by mowed grass extending nearly to the stream edge with only scattered trees set back from the bank. This lack of riparian woody vegetation is the most significant deficiency at this location. The bank is low and currently stable but vulnerable to future erosion without improved vegetative protection.

The left bank riparian zone is very narrow, estimated at 10-25 feet of woody vegetation before transitioning to open agricultural/pastoral land. For a 3-5 foot wide channel, this represents approximately 3-5x channel width, but the absolute width is very thin and filtering function is compromised. The narrow buffer provides minimal water quality protection from adjacent agricultural activities.

The right bank has essentially no woody riparian buffer. Mowed grass extends to within a few feet of the bank edge. Scattered trees are present but set back from the bank and do not form a contiguous riparian corridor. The filtering and habitat functions are severely compromised. This is the most significant riparian deficiency at this location.

The floodplain vegetation is significantly altered from a natural state. The right floodplain is mowed grass, and the left side has only a thin strip of natural vegetation before transitioning to agricultural/pastoral land. The ecosystem functioning is compromised by the lack of forested floodplain habitat.

During leaf-on conditions, the large overhanging trees on the left bank would provide moderate shade (estimated 25-50%) over the narrow channel. However, the right bank lacks canopy trees, so shade is one-sided. During winter conditions as captured, minimal shade is provided. Score of 4 reflects the partial but incomplete canopy coverage expected during the growing season.

This location has significant riparian buffer deficiencies on both banks. The right bank is the most critical need with mowed grass extending to the bank edge. The left bank buffer, while present, is narrow and may not meet TDEC 30-foot minimums. Buffer restoration through native tree and shrub planting would be highly effective given the rural setting and available land area.

The channel has limited favorable substrate for epifaunal colonization. Some natural rock/gravel substrate, minor undercut banks on the left, and exposed root systems provide colonization surfaces. However, the small channel size, uniform shallow flow, and limited woody debris reduce the overall habitat quality. Approximately 25-35% of the substrate is favorable.

The gravel and limestone fragments visible in the bed appear moderately embedded in finer sediment. The slightly turbid water and visible fine sediment deposits suggest 25-50% embeddedness. The proximity to agricultural land likely contributes to sediment inputs. Score of 5 reflects moderate embeddedness consistent with the agricultural setting.

The channel is very shallow throughout with the entire bottom discernible. No significant pools are visible. The low gradient and narrow channel do not support deep pool formation. A few slightly deeper areas may exist where flow pools behind rocks, but these are minimal. Score of 2 reflects the near-absence of meaningful pool habitat.

Limited fish cover is available in this small headwater stream. Overhanging branches from the left bank trees, minor undercut banks, and root mats from the large tree provide some cover. However, the lack of deep pools, minimal woody debris in the channel, and absence of boulders/cobble of sufficient size limit the cover types to approximately 3.

No barriers to fish movement are visible in this reach. However, the very low flow conditions may seasonally limit fish passage, and road crossings or culverts may exist upstream or downstream that are not visible from this location. Score of 8 accounts for potential seasonal low-flow limitations.

Very little large woody debris is visible in the channel. A few small branches and sticks are present but no significant logs, debris jams, or pool-forming LWD. The brush pile visible on the right bank in the right face image is on the floodplain, not in the channel. The mowed right bank and agricultural context may result in removal of woody debris. Score of 2 reflects the near-absence of functional LWD.

Three types of invertebrate habitat are present: coarse gravel/rock substrate, minor undercut banks on the left, and accumulated leaf packs. However, the substrate is partially embedded, LWD is essentially absent, and the small channel size limits habitat diversity. The leaf-off conditions likely reduce leaf pack availability. Score of 4 reflects limited but present habitat.

Score of 6 is assigned based on habitat quality assessment suggesting the stream could support a facultative macroinvertebrate community. The gravel substrate with flowing water, minor undercut banks, and limited but present organic material suggests Group II taxa are likely present. Direct sampling would be needed to confirm.

No macroinvertebrates were directly observed in the imagery. However, the habitat present (gravel substrate, flowing water, some cover features) would likely support a facultative community. Score assigned based on habitat assessment rather than direct observation. The winter timing and low flow conditions may reduce observable activity.

Suitable Habitat: No

The small stream size, limited riparian buffer, and agricultural setting reduce the likelihood of supporting rare, threatened, or endangered species. However, headwater streams in this region can provide habitat for some sensitive aquatic species. A biological survey would be needed to confirm.

No wildlife directly observed. The brush pile visible in the right bank view and the dead/standing branches in the canopy provide some potential wildlife habitat. The winter timing and human presence during the survey may have reduced wildlife visibility.

The water has a slight brown tint and mild turbidity but is not heavily clouded. The bed is visible through the shallow water. No oil sheen, foam, or surface films are apparent. The brownish color may be from natural tannins and/or fine sediment. Visibility appears to be approximately 1-2 feet. Score of 6 reflects slightly turbid but generally acceptable water appearance for a rural headwater stream.

No significant algal growth or macrophyte development is visible. The water is not green and no algal mats are apparent. The winter/early spring timing may reduce visible algae. Some minor algal growth may be present on rocks but is not prominent. The proximity to agricultural land suggests potential nutrient inputs, but visual evidence is limited. Score of 7 reflects generally low nutrient enrichment indicators.

No direct evidence of manure or livestock waste is visible in or near the stream. However, the adjacent pastoral/agricultural land and what appears to be a fence line suggest livestock use in the area. No livestock are visible and no manure or waste is apparent. The fence may serve to exclude livestock from the stream. Score of 7 reflects the absence of visible waste with acknowledgment of the agricultural setting.

This small headwater stream is a warmwater system. The partial canopy coverage from left bank trees provides some shade during leaf-on conditions, but the lack of canopy on the right bank means the stream receives significant direct solar radiation, particularly during afternoon hours. During summer, the shallow flow and limited shade could result in elevated water temperatures. Riparian buffer restoration on the right bank would improve thermal management.

No apparent permit violations observed. The lack of riparian buffer on the right bank may be a pre-existing condition rather than a recent disturbance.

Terrestrial Invasives Assessment

Aquatic Invasives Assessment

Some green vining vegetation visible on the left bank in winter could be Japanese honeysuckle (semi-evergreen vines remaining green in winter are characteristic). Some of the understory shrub structure could include bush honeysuckle. Confidence is low due to dormant conditions limiting species identification. A growing-season survey would provide more definitive identification.