Black Branch 2

Small perennial stream in agricultural landscape showing significant sedimentation and turbidity. Habitat is degraded with minimal riparian buffer. Sediment impairment likely from agricultural runoff and bank erosion.

Channel is largely natural upstream but a concrete box culvert at this location represents significant local alteration. The channel appears to maintain a natural planform but is influenced by the road crossing. Some bank erosion and lateral instability evident but not severe downcutting.

Stream appears to have some floodplain connection based on debris lines and flood deposits visible on banks. The channel is not deeply incised, with banks at moderate 3-6ft height. The culvert may cause some backwater effects and minor hydrologic alteration. Agricultural land use and road contribute to increased runoff.

Significant sediment deposition evident from extremely turbid water. Pool upstream of culvert appears to be filling with fine sediment. The silt/mud substrate indicates chronic sedimentation. Agricultural land use without adequate riparian buffers contributes to sediment loading.

Only slow-deep (pooled area in front of culvert) and slow-shallow (upstream reach) regimes visible. No riffles or fast-water habitat observed. The low gradient and silt substrate limit velocity/depth diversity.

Water appears to fill most of the channel cross-section, reaching near the base of both banks. Flow appears above normal, likely from recent precipitation. Channel appears well-watered throughout the visible reach.

No riffles visible in this reach. The channel is dominated by flat water and pools. The low gradient and fine sediment substrate do not support riffle development. This is consistent with a low-gradient agricultural stream.

This is a low-gradient agricultural stream with fine-grained banks and bed. The Rosgen classification is uncertain - could be E or C type. The narrow channel with cohesive banks and low gradient is somewhat consistent with an E-type, but the degraded riparian condition and agricultural modification complicate classification. The stream may have been historically straightened or modified. The concrete box culvert represents a local fixed point in the channel planform.

Left bank (visible in right and front faces) shows moderate instability. Bank is moderate height (3-6ft) with steep angle, especially near the road embankment. Some root protection from scattered trees but significant bare soil exposure. Dormant vegetation and vine tangles provide some seasonal protection but overall stability is marginal.

Approximately 50-60% coverage in winter condition with dormant grass, some bare trees, and vine tangles. Buffer is narrow - primarily grass with scattered trees. Invasive vines (likely Japanese honeysuckle or similar) present. The road embankment has grass but the transition to the stream bank has significant bare areas.

Left bank transitions from natural condition upstream to engineered condition at the culvert. Road embankment is grass-covered. Invasive vine tangles dominate the bank edge vegetation.

Right bank (visible in left and back faces) shows more erosion concern. Bank is moderate height with steep to vertical sections. Exposed roots and bare soil are evident, particularly at the waterline. Agricultural field extends to near the bank edge with minimal buffer, contributing to instability. Some undercutting evident.

Approximately 40-55% bank coverage. Agricultural field extends close to the bank edge with only grass and dormant herbaceous cover. Very narrow buffer with no shrub or tree layer on most of this bank. Exposed roots and bare soil at waterline indicate inadequate vegetative protection.

Right bank is more vulnerable due to agricultural land use extending close to the bank edge. Very narrow or absent riparian buffer. Utility markers in adjacent field suggest buried pipeline. Bank erosion more pronounced on this side.

Left bank has a narrow strip of trees and shrubs, perhaps 10-25 feet, before transitioning to grass and the road embankment or developed areas. The riparian zone is fragmented and narrow, especially near the culvert. The filtering function is compromised.

Right bank has essentially no significant riparian buffer. Agricultural field extends to within feet of the bank edge in most visible areas. Only isolated trees and dormant grass separate the field from the stream. Filtering function severely compromised.

Most natural riparian vegetation has been removed for agriculture. Only scattered trees remain, primarily at the bank edge. The floodplain vegetation is dominated by grass/pasture and is not in a natural state. Dormant vines (likely invasive) are present but do not constitute a healthy riparian community.

Canopy cover is very low. The bare winter trees provide essentially no shade currently, and even in full leaf the sparse tree canopy would provide less than 25% shade coverage over the stream. The open agricultural landscape allows extensive solar exposure.

Both banks fail to meet TDEC's minimum 30ft riparian buffer requirement. The right bank is especially deficient with agriculture extending to the stream edge. Buffer restoration potential is high given the low-intensity agricultural land use and available land area. Riparian planting would significantly benefit water quality and bank stability.

Very limited favorable substrate for colonization. The bed appears to be predominantly soft silt/mud with minimal hard substrate. Some root exposure at banks provides limited habitat. No cobble, boulders, or stable woody debris observed in the channel. The fine substrate is likely unstable and subject to scour.

Substrate is dominated by silt and mud as evidenced by the brown turbid water and sediment plume from wading. Any coarser substrate is likely deeply buried under fine sediment. This is a low-gradient stream with chronic sedimentation from agricultural runoff.

A pool is present at the culvert inlet where water backs up, but it appears shallow (likely 1-3 feet) and is filling with sediment. The upstream reach shows relatively uniform depth without significant pool development. Pool habitat quality is compromised by sedimentation.

Limited fish cover available. Overhanging vegetation (dormant) and some exposed root systems at bank edges provide marginal cover. Undercut banks noted on the right bank. No logs, deep pools, boulders, or macrophyte beds observed. The culvert may provide some dark refuge. Cover diversity is poor for a stream of this size.

The concrete box culvert at this location represents a potential barrier to fish movement, though it appears the water level is relatively even with no significant drop at the inlet. Under low flow conditions, the culvert could become a barrier due to shallow water depth. The culvert appears passable under current above-normal flow conditions.

Very little large woody debris in the channel. Only small branches and twigs visible. The agricultural landscape with sparse riparian trees limits LWD recruitment. No debris jams or pool-forming woody debris observed. The channel appears to have been maintained clear of significant woody debris.

Very poor invertebrate habitat. The substrate is dominated by unstable silt/mud with no cobble, gravel, or stable hard substrate for colonization. Only undercut banks with root exposure provide any habitat. No leaf packs, submerged logs, or coarse substrate observed. The fine sediment likely smothers any potential habitat.

Habitat assessment suggests only tolerant organisms would likely persist in this reach. The silt-dominated substrate, high turbidity, and limited habitat diversity indicate conditions favoring Group III tolerant taxa such as midges and aquatic worms.

No macroinvertebrates directly observed in the images. Assessment based on habitat quality only. The soft silt substrate, high turbidity, and lack of diverse habitat suggest the community would be dominated by tolerant taxa (Group III) if present. Winter conditions also limit visual observation.

Suitable Habitat: No

Limited wildlife habitat quality due to degraded riparian buffer, poor instream habitat diversity, and agricultural land use. The winter season and wading disturbance may explain absence of observed wildlife. Some brush pile habitat exists from accumulated debris.

No wildlife directly observed. Winter conditions and surveyor disturbance from wading likely reduce wildlife visibility. Habitat quality is poor for most aquatic species due to silt substrate and lack of cover.

Water is considerably turbid with a brown/muddy color. Visibility appears to be less than 1 foot, possibly under 0.5 feet given the opaque quality. The bed is not visible even in what appears to be shallow areas. This could be partly from recent precipitation but the chronic fine sediment substrate suggests persistent turbidity issues.

No visible algae growth or excessive macrophytes observed. The brown turbidity is sediment-based rather than algae-based. The winter dormant season and turbid water limit algae assessment. The absence of visible nutrient enrichment signs during winter is not conclusive but current observations suggest moderate conditions.

No direct evidence of manure or waste observed. However, the agricultural setting with pastures extending near the stream and a red barn visible in the distance suggests potential livestock operations. No direct livestock access to the stream is visible at this location, and no manure or waste is observed in the channel. Fencing may be present but is not clearly visible.

Stream receives very little shade due to sparse riparian canopy. Even during full leaf-out, the scattered mature trees would provide less than 25% shade. The open agricultural setting and south-facing exposure suggest significant solar heating during summer months. Riparian planting would significantly improve thermal conditions. No thermal refugia observed. The culvert provides localized shade but is not a meaningful thermal refuge.

No active permit violations observed. However, the lack of riparian buffer on agricultural land may warrant outreach regarding voluntary conservation practices.

Terrestrial Invasives Assessment

Aquatic Invasives Assessment

Dense vine tangles on the left bank are likely Japanese honeysuckle based on the growth pattern and persistence of structure in winter dormancy. Some bush honeysuckle or multiflora rose may be present in the shrub layer but identification is difficult in winter dormant conditions. The sparse canopy and degraded riparian zone create conditions favorable for invasive species proliferation. Medium confidence in identifications due to winter dormancy.