Black Branch 2

Small headwater stream in rural agricultural setting. Water appears relatively clear at base flow. No obvious impairment indicators at this location, though the limited riparian buffer and adjacent agricultural land use could contribute to periodic sediment and nutrient loading.

Channel appears largely natural with no obvious channelization or significant structural alteration. Some possible placed stone on the left bank downstream, but the channel itself maintains a natural form. Low banks and floodplain connectivity suggest the channel is in reasonable geomorphic condition. Minor past disturbance possible near the barn.

Channel shows low banks with good floodplain connection on both sides. The grass on the right bank extends to near water level, and the left bank is low enough for periodic overbank flooding. Slight incision may have occurred but the channel appears to maintain reasonable floodplain access. No dams or major structures limiting connectivity.

Some minor sediment deposits visible along channel margins and at inside bends. The bed is primarily cobble/rock with minor fine sediment accumulation. Estimated 10-20% of the bottom affected by deposition. No major bar development or pool infilling observed.

At current low flow conditions, the channel is dominated by shallow flow conditions. Only slow-shallow and fast-shallow regimes are apparent. No deep pools visible. The very shallow water depth throughout limits habitat diversity. This may improve at higher flows.

Water fills approximately 50-75% of the active channel width. Exposed substrate is visible on both sides, particularly along margins. Water does not reach the base of both banks in many areas. This appears to be low baseflow conditions rather than a chronic dewatering issue.

From the visible portion of the channel, there appears to be some variation in bed form with shallow run sections and possible riffle areas over the exposed rock. The bedrock/cobble substrate provides some natural riffle habitat, but at current low flows, distinct riffle-pool sequences are difficult to identify. Estimated moderate spacing.

This appears to be a small, low-gradient headwater stream with moderate sinuosity and good floodplain connectivity. The channel form most closely resembles a Rosgen E-type stream, though the wide-shallow character at low flow could also suggest C-type. The limestone bedrock exposures and cobble substrate are consistent with Middle Tennessee geology. Channel appears relatively stable with low banks. Confidence in Rosgen classification is low due to the single point observation and leaf-off/low-flow conditions.

Left bank is moderately stable. Some areas show stacked/placed rock stabilization along the bank edge (visible in front face). Dense shrub thicket provides vegetation cover between the stream and the barn. Some bare soil visible but overall bank appears to hold. Root protection appears limited in the rock-armored sections. The adjacent barn structure within ~25-50 feet of the channel is a concern for potential pollutant sources.

Vegetation coverage on the left bank is approximately 60-75%. Dense shrub thickets are present in some areas, but the rock-armored sections near the water have limited vegetative cover. Some of the shrubs appear to be invasive species (bush honeysuckle or multiflora rose). Root coverage at the baseflow line is limited where rock armoring is present.

Left bank has dense shrub cover with possible invasive species. Red barn/agricultural building very close to stream (~25-50 ft). Agricultural fields visible beyond. The stacked rock along the bank requires field verification to determine if it is placed stabilization or natural outcrop.

Right bank is low and relatively stable with grass cover extending close to the stream edge. Banks are gradual and low (under 3 feet). Some minor scour and bare soil visible along the water's edge. Root protection from grass is moderate but not as effective as woody vegetation would be. The mowed grass area suggests active maintenance that may prevent deeper root development.

Right bank has approximately 60-70% grass coverage extending to near the channel edge. However, the vegetation is primarily mowed grass rather than deeper-rooted native riparian species. Trees are sparse and set back from the bank edge. The mowed condition indicates regular maintenance that keeps vegetation low, reducing its protective capacity. Some bare soil along the immediate bank edge.

Right bank is maintained as mowed grass/pastoral area with scattered mature trees. Low bank angle provides good floodplain access but limited woody riparian vegetation. The mowed condition up to the stream edge suggests the riparian buffer is compromised by land management practices.

The left bank has a narrow strip of shrub/tree vegetation between the stream and the adjacent barn/agricultural area. The buffer appears to be approximately 10-25 feet wide, which is roughly 3-5x the channel width for this narrow stream but in absolute terms is quite narrow. The barn encroaches within 25-50 feet. Beyond the barn, agricultural fields are visible, providing no additional buffering function.

The right bank has very limited natural riparian vegetation. Mowed grass extends from approximately 10-25 feet from the stream edge, with scattered mature trees. Beyond the grass is open pastoral/agricultural land. The mowed condition significantly reduces the buffer's filtering and habitat functions.

The floodplain vegetation is significantly altered from a natural state. The right floodplain is maintained as mowed grass with scattered trees. The left floodplain has an agricultural building and shrub thickets with likely invasive species. Native floodplain forest has been largely removed and replaced with managed grass and agricultural land use.

Currently in leaf-off condition, so shade assessment is limited. Based on the density and placement of mature trees visible in the canopy (UP face), summer shade would likely be approximately 25-50% when trees are in full leaf. The open areas on the right bank and gaps on the left bank would allow significant light penetration even in summer. For a warmwater stream, this is a marginal shade level.

Both banks show significant buffer deficiencies. The left bank has a barn within the buffer zone and invasive vegetation. The right bank is mowed to the stream edge. Riparian buffer restoration through cessation of mowing, invasive species removal, and native tree/shrub planting would be highly beneficial and feasible at this location.

Approximately 25-35% of the substrate appears favorable for macroinvertebrate colonization. The cobble/rock substrate provides some colonization surface, and there is a fallen tree spanning the channel upstream that could provide woody debris habitat. However, the very shallow water limits the effective habitat available, and much of the substrate appears relatively uniform. Limited undercut bank habitat and no significant aquatic vegetation.

The cobble and gravel substrate visible in the channel appears to be approximately 25-40% embedded in fine sediment. Some areas show clean rock surfaces, while other areas have fine sediment and silt deposits around the rock. The agricultural land use likely contributes to periodic fine sediment inputs. The bedrock exposures in the upstream view help anchor the substrate.

Pools are essentially absent at current flow conditions. The entire stream bottom is visible throughout the reach, indicating very shallow water depth throughout. One small, shallow pool area may exist near the fallen tree upstream, but no significant pool habitat is evident. The flat gradient and narrow channel contribute to the lack of pool development.

Limited fish cover types available. The fallen tree across the channel provides some woody debris cover. Overhanging vegetation from the left bank shrubs provides marginal cover. Some exposed roots are visible. However, deep pools, undercut banks, boulder cover, and aquatic macrophyte beds are absent or very limited. The very shallow depth throughout the reach severely limits fish habitat.

No barriers to fish movement are visible within this reach. However, the very shallow water depth at current conditions may itself be a seasonal barrier to fish movement. The fallen tree across the channel does not appear to create a complete barrier. No culverts, dams, or weirs visible.

A few pieces of large woody debris are visible, most notably a large fallen tree spanning the channel in the upstream view. The moss-covered logs on the right bank area suggest some recruitment potential. However, the overall LWD density is sparse, estimated at 3-5 pieces per 100m. The channel-spanning log has not created significant pool habitat at current flows. Decay classes suggest moderate age of debris.

Three types of invertebrate habitat are identifiable: cobble substrate in the channel, the large submerged/partially submerged log spanning the channel, and leaf pack accumulations. However, the very shallow depth limits the effective habitat, and the cobble surfaces appear somewhat embedded. Undercut banks are minimal, and coarse gravel is limited. The habitat diversity is at the lower end of the 3-4 type range.

Habitat conditions suggest potential for a Group II (facultative) invertebrate community. Clean cobble substrate, clear water, and some woody debris are present. However, the shallow depth, limited habitat diversity, and agricultural land use may limit community composition. Actual biological sampling would be needed to confirm.

No actual macroinvertebrates directly observed from the imagery. Assessment is based on habitat quality only. The limestone cobble substrate and clear water suggest the stream could support a moderate invertebrate community including some facultative taxa. Score assigned at the Group II level based on habitat assessment, pending actual biological sampling.

Suitable Habitat: No

This degraded headwater stream in an agricultural setting has limited potential for species of concern. The shallow depth, limited habitat diversity, and agricultural land use reduce suitability for sensitive species. The cobble substrate could potentially support some native mussel species if water quality and flow conditions improve.

No wildlife directly observed. The dormant season and time of day likely contribute to low visibility. The brush piles and fallen woody debris provide some cover for small mammals and birds. Standing dead wood (snags) visible could support cavity-nesting species.

Water appears relatively clear in the DOWN face view, with the stream bottom clearly visible throughout. The shallow depth makes clarity assessment somewhat limited, but the water has minimal turbidity. Slight brown coloration visible in some areas, likely from dissolved organic matter (tannic). No oil sheen, algal mats, or discoloration observed.

Water appears clear with no obvious green coloration. Some minor algal growth may be present on rock surfaces (typical for limestone streams), but no excessive algae, algal mats, or dense macrophyte growth observed. The adjacent agricultural land use suggests potential nutrient inputs, but current visual indicators do not suggest significant enrichment.

No direct evidence of manure or waste in the stream. No livestock are visible and no obvious livestock access points to the stream corridor. However, the agricultural setting and barn proximity suggest that livestock may use this area, and fencing visible in the right bank view may indicate livestock management. No waste pipes or direct discharge evidence.

This is a warmwater stream in a rural setting with patchy shade from scattered mature deciduous trees. The limited riparian buffer, especially the mowed grass on the right bank, reduces shade potential. During summer months with full leaf-out, shade coverage would improve but likely remain below optimal levels due to the sparse tree density and gaps in the canopy. Riparian tree planting would significantly improve thermal conditions.

Minor tree clearing in the riparian buffer area. While concerning for stream health, this appears to be routine land management on private agricultural property. The clearing reduces an already deficient riparian buffer. No obvious permit violations, but the activity is occurring within the buffer zone.

Terrestrial Invasives Assessment

Aquatic Invasives Assessment

The dense shrub thickets visible on the left bank in the LEFT face image display growth patterns highly consistent with bush honeysuckle (Amur honeysuckle, Lonicera maackii), which is extremely common in Middle Tennessee riparian areas. The arching multi-stemmed growth form and early leaf-out (some green visible while other trees are bare) are characteristic indicators. Some vine growth in the thickets may be Japanese honeysuckle. Multiflora rose is also likely present based on the dense thorny-looking growth. Confidence is medium because the leaf-off condition limits species identification certainty. A growing-season visit would improve identification confidence.