Black Branch 2

Small headwater stream in agricultural setting. Silt-dominated substrate and thin riparian buffer suggest sediment impairment from adjacent agricultural land use. Stream likely classified for fish and aquatic life support but may be impaired.

Channel appears natural with no visible structural alterations, straightening, or armoring. Some evidence of minor lateral erosion but no active downcutting. The channel maintains a natural form though substrate is dominated by fine sediment suggesting possible aggradation. The stream appears to access its floodplain.

The channel shows slight incision but appears to maintain some floodplain connectivity. Low banks suggest the stream can access its floodplain during moderate events. Adjacent agricultural land use may have altered the hydrologic regime through increased runoff and reduced infiltration.

Significant fine sediment (silt/mud) dominates the substrate, suggesting excess sediment loading likely from agricultural runoff. Approximately 30-50% of the bed appears affected by fine sediment deposition. The natural bedrock visible in the front view is partially buried by sediment in other areas.

The stream is dominated by shallow conditions throughout. Some variation in velocity over bedrock and through runs, but no deep pools or fast-deep areas observed. Only 2 of 4 velocity-depth regimes present.

Water is present throughout the channel but at low levels. Flow does not fill the full width of the channel. Some exposed substrate is visible along margins and over bedrock areas. Estimated 50-75% of channel cross-section contains water.

The stream is low gradient and dominated by run habitat. Some shallow riffle-like areas occur over exposed bedrock but these are infrequent. The channel is mostly uniform glide/run habitat. This is more of a low-gradient system where pool-riffle metrics are less applicable.

This headwater stream in an agricultural setting shows characteristics of a low-gradient stream with fine substrate. The natural bedrock exposure downstream suggests a mixed-bed system. The E-type classification is tentative - could also be a C-type given the broader valley setting. The channel is small enough that classification is challenging from imagery alone. Fine sediment loading from agricultural land use has modified the substrate from what would be expected in a limestone-bedrock setting.

Left bank (visible in RIGHT face) is low with moderate slope. Some areas have root protection from trees and shrubs but significant portions show bare soil. Minor scour erosion present. Bank height is low which limits failure risk. Approximately 25-33% of bank protected by root systems.

Approximately 50-70% vegetative coverage on the left bank. Winter dormancy reduces apparent cover but ground-level herbaceous vegetation and tree roots provide some protection. Patches of bare soil visible. Mostly native species present including deciduous hardwoods and eastern red cedar.

Left bank is low and moderately stable. Agricultural fields are visible beyond the thin riparian buffer suggesting potential for runoff impacts. Minor erosion present but not severe.

Right bank (visible in LEFT face and BACK) shows more root exposure and somewhat more active erosion than the left bank. Eastern red cedar trees on bank edge have exposed root systems. Some undercutting visible. Bank is low but erosion is moderately active in places.

Approximately 50-60% coverage. More bare soil exposed on right bank than left. Root exposure indicates bank retreat. Eastern red cedar and other trees provide some stability but ground cover is sparse. Agricultural influence evident.

Right bank shows more active erosion than left bank. Root exposure on eastern red cedar trees indicates ongoing bank retreat. Thin riparian buffer with agricultural fields visible beyond the tree line.

The left riparian buffer appears to be approximately 25-50 feet wide based on the visibility of agricultural fields through the trees. For a stream approximately 5-8 feet wide, this represents roughly 3-6x the channel width, which would normally score higher. However, the buffer is thin with sparse understory and the filtering function appears partially compromised. Scoring at 5 reflects the moderate but inadequate buffer condition.

The right riparian buffer appears narrower than the left, estimated at 10-25 feet based on the LEFT face view showing agricultural fields closer to the stream on this side. The buffer is thin and dominated by a few large trees (eastern red cedar) with sparse understory. Filtering function is compromised.

Some trees and shrubs present along banks but the floodplain transitions quickly to agricultural land. The riparian corridor is narrow and the floodplain vegetation beyond the immediate streamside trees is largely cultivated/agricultural. Fair condition overall.

Winter dormancy significantly reduces canopy cover. The UP face shows mostly bare deciduous branches with some evergreen cover from eastern red cedars. During growing season, coverage would increase substantially. Current shade estimated at 25-50% but would be higher in summer. Scoring reflects year-round average.

Right bank riparian buffer appears insufficient per TDEC 30ft standard in some areas. Agricultural land directly adjacent to narrow riparian corridor contributes to sediment loading and reduces buffering capacity. Buffer restoration on both banks, particularly the right bank, would improve water quality and habitat.

Approximately 20-40% of substrate is favorable for epifaunal colonization. Some undercut banks, root wads from cedar trees, and exposed bedrock/cobble provide colonization surfaces. However, much of the substrate is buried in fine sediment (silt/mud) which limits habitat quality. Sparse woody debris in the channel.

For this low-gradient system, the substrate is dominated by silt and mud with some areas of exposed bedrock. Where gravel/cobble is present, it is 50-75% embedded in fine sediment. Some root mats present from bank trees but limited submerged vegetation. The dominant fine sediment substrate reduces habitat diversity.

Pools are rare and shallow in this headwater stream. The stream is predominantly uniform shallow runs with very few pool features. Where pools exist, they are shallow (likely under 1 foot) and the entire bottom is discernible. The bedrock outcrop downstream may create a small pool feature but overall pool habitat is limited.

Only 3 cover types identified: undercut banks, root mats from cedar trees, and some overhanging vegetation. No significant woody debris, deep pools, boulders, or macrophyte beds observed. Cover is limited for a stream of this size.

No barriers visible within this scene. However, very low flow conditions during dry periods could potentially limit fish movement in this shallow headwater stream. No culverts, dams, or grade control structures visible.

Sparse LWD visible in the channel. A few small branches and twigs are present but no significant logs, debris jams, or pool-forming wood. The narrow channel and thin riparian buffer limit the recruitment of large woody debris.

Three habitat types identified: undercut banks with root systems, some coarse gravel/bedrock areas, and scattered leaf packs in the channel. However, much of the substrate is covered with fine sediment which reduces overall invertebrate habitat quality. Limited woody debris and no cobble/boulder habitat present.

Score assigned at 6 based on habitat conditions that would support a moderate invertebrate community. The mix of bedrock, gravel, and organic material provides some habitat, but heavy sedimentation would shift community toward more tolerant facultative taxa.

No macroinvertebrates directly observed in imagery. Score based on habitat assessment suggesting the stream could support a moderate community dominated by facultative taxa given the mixed substrate, some bedrock, and moderate water quality. The fine sediment dominance would favor more tolerant species.

Suitable Habitat: No

This small headwater stream in an agricultural setting has limited habitat complexity. The fine sediment substrate and narrow buffer reduce habitat quality for most species of concern. However, headwater streams can support unique invertebrate communities.

No wildlife directly observed. Winter conditions and surveyor presence may limit observations. The habitat is relatively limited for a headwater stream in an agricultural setting. Some brush piles along banks could provide cover for small wildlife.

Water is slightly turbid with a brown/tea coloration, likely from tannins and suspended sediment. Objects on the bed are visible in the shallow water. No oil sheen, film, or foam observed. Visibility estimated at 1-3 feet. The brown color may be partly natural for this type of headwater stream in a limestone/agricultural setting.

Water is not green and no macrophyte growth observed. Minor algal growth may be present on substrates but not visible at this scale. No evidence of severe nutrient enrichment. However, proximity to agricultural fields suggests potential for nutrient inputs during runoff events.

No direct evidence of manure or livestock waste visible. No livestock access points, fencing, or waste visible. Agricultural fields appear to be crop-based rather than pasture. However, the agricultural setting warrants some caution.

This is a warmwater headwater stream with patchy shade from the riparian corridor. During summer, the thin riparian buffer would provide limited shade, particularly on the right bank where the buffer is narrowest. Agricultural fields adjacent to the stream could contribute to elevated temperatures through reduced shading and warm runoff. Riparian buffer enhancement would improve thermal conditions.

No active disturbance or permit compliance concerns observed at this location.

Terrestrial Invasives Assessment

Aquatic Invasives Assessment

Difficult to positively identify invasive species in winter dormancy. Some shrub forms in the riparian zone could be bush honeysuckle based on growth pattern, and vine-like ground cover may include Japanese honeysuckle. Confidence is low due to bare conditions. Summer survey recommended for definitive identification.