Black Branch 2

Small headwater stream in agricultural setting near Nashville Basin. Classified as likely supporting fish and aquatic life based on perennial flow and substrate. Some sediment stress visible but not yet at impairment levels from visual assessment alone.

Channel appears largely natural with no visible direct channel modifications. The agricultural building proximity suggests historical land use impacts, but the channel itself shows natural morphology. Some incision may be present based on bank heights, but the channel retains natural features. Score of 7 reflects mostly natural condition with minor land use influence.

Stream shows slight incision with moderate bank heights of 3-6 feet in some areas. The floodplain appears to be connected on at least one side (right bank has green grass area at similar elevation). Agricultural land use and the proximity of the barn suggest some watershed impervious area. Score of 6 reflects mild hydrologic alteration consistent with agricultural land use.

Some fine sediment visible in pools and on channel bed. The slightly turbid water suggests sediment transport. Not excessive deposition but noticeable fine sediment accumulation. Estimated 10-20% of bottom affected. Score of 6.

The channel appears dominated by slow-shallow and slow-deep pools. No visible riffles or fast water areas in the panorama. Low gradient and low flow conditions limit habitat diversity. Only 2 regimes apparent.

Water is present but does not fill the full channel width. Exposed substrate is visible along banks and in portions of the channel. Approximately 50-75% of the channel width contains water. Score of 5 reflects this moderate flow condition.

No riffles visible in the panoramic view. The stream appears to be dominated by flat water pools and slow runs. This may be partly due to the low gradient nature of the reach. Score of 3 for lack of riffle habitat.

Small headwater stream in the Nashville Basin area with limestone-derived gravel substrate. Low gradient with moderate sinuosity. Channel appears to be a Type E or possibly Type C stream based on its low gradient, sinuous planform, and gravel substrate. The presence of the floodplain connection on the right bank and the steeper wooded hillside upstream suggest a valley setting that transitions between confined and unconfined. Confidence is low due to limited visibility of full channel geometry from a single panoramic position.

Left bank shows moderate bank heights with some erosion and undercutting. Tree roots provide some stabilization but bare soil is visible. The proximity of the barn limits the riparian buffer. Bank angles are moderate to steep in places. Some root exposure indicates active erosion. Score of 5 reflects moderate stability concerns.

Vegetation coverage on the left bank is limited by the proximity of the barn and leaf-off conditions. While trees are present, the understory is thin. Bare soil is exposed in 26-50% of the visible bank area. Winter dormancy reduces functional coverage. Some grass and herbaceous cover visible but sparse. Score of 4 reflects compromised vegetative protection.

Left bank is adjacent to a red metal agricultural building. Narrow riparian buffer between barn and stream. Moderate erosion with some undercutting. Angular limestone fragments at bank toe may provide some natural armoring.

Right bank shows moderate bank heights with erosion at the bank toe. Green grass covers much of the upper bank area but the toe is actively eroding. Fallen logs and root exposure indicate ongoing erosion processes. The grassy floodplain area is relatively well-connected. Score of 5.

Right bank has grass coverage on the upper bank and floodplain, but the lower bank and toe area show exposed soil and roots. Approximately 50-70% of the bank face has some form of vegetation. Trees are present but sparse in the immediate riparian zone. Score of 5 for moderate vegetative protection.

Right bank has grassy floodplain area with scattered trees. Bank toe erosion is evident with exposed roots and soil. Fallen logs cross the channel from this bank, providing some habitat but indicating bank retreat.

The left riparian buffer is severely constrained by the red barn/agricultural building which is within approximately 20-30 feet of the stream channel. Only a thin strip of trees separates the stream from the building. For a channel width of approximately 6-8 feet, this provides roughly 3-4x the channel width, but much of that is occupied by the barn structure. Effective natural vegetated buffer is approximately 10-25 feet. Score of 3.

The right riparian zone has scattered trees with a grassy maintained area extending approximately 25-50 feet before transitioning to more open agricultural land. Trees are present but sparse. The grassy area, while vegetated, is maintained/mowed and does not provide optimal riparian buffer function. Score of 5.

The floodplain vegetation is marginal. The left side is dominated by the barn with minimal natural vegetation. The right side has mowed grass with scattered trees but lacks the diverse shrub and herbaceous layers expected in a healthy riparian zone. Brush piles visible on the right side suggest recent clearing. Score of 2.

In winter/early spring with bare deciduous trees, canopy cover provides less than 25% shade. Even in full leaf season, the sparse tree density and gaps from the barn structure would limit coverage to approximately 25-50%. For warmwater streams, some open conditions are acceptable, but the overall shade is below optimal. Score of 4 reflecting the winter conditions and sparse canopy.

The red metal agricultural building on the left bank represents a significant encroachment into the riparian buffer zone, likely within 20-30 feet of the stream. This pre-existing structure limits buffer restoration potential on the left side. The right bank has moderate restoration potential through reduced mowing and native planting. Per TDEC MS4 permit section 4.2.5.4, a minimum 30-foot riparian buffer is required.

Fallen logs crossing the channel provide some habitat structure. Undercut banks and exposed root systems offer cover. Gravel/cobble substrate at bank toe provides some colonization potential. However, fine sediment covers portions of the bed. Approximately 40-50% of substrate is favorable. Score of 5.

Gravel and cobble visible in the down face show moderate fine sediment embedding. The slightly turbid water and silt visible in pool areas suggest active fine sediment deposition. Approximately 25-50% of coarser substrates are embedded. Score of 5 for low gradient stream assessment.

Pools are present and visible in multiple faces, but they appear shallow (under 1 foot) with the bottom generally discernible. No deep pools observed. The low gradient creates pool-like conditions but without significant depth variety. Score of 5.

Four cover types are identifiable: fallen logs/woody debris crossing the channel, overhanging bare branches (limited function in winter), undercut banks, and exposed root systems. Absent are deep pools, boulders, macrophyte beds, and riffles. Score of 5 for 4 cover types.

No barriers to fish movement are visible in this panoramic scene. No culverts, dams, weirs, or drop structures observed. Score of 10.

Several fallen logs are visible spanning the channel, visible in the right bank view. These are medium to large in diameter and moderately decayed. No debris jams formed. The logs span the channel but do not appear to be forming pools. Approximately 3-7 pieces visible in this reach. Score of 5.

Four types of macroinvertebrate habitat are identifiable: submerged logs crossing the channel, accumulated leaf packs in pool areas, undercut banks with root systems, and coarse gravel substrate at the bank toe. The logs show moderate decay suggesting some colonization time. Score of 5 for 4 habitat types which falls between the 3-4 types (score 7) and 1-2 types (score 3) criteria - adjusted down due to winter conditions and moderate sediment covering some habitat.

Habitat conditions suggest the stream could support Group II macroinvertebrate communities. No direct organisms visible in panoramic images, which is typical for this capture method. Score reflects habitat potential rather than confirmed presence.

No macroinvertebrates directly observed in imagery. Assessment based on habitat quality which suggests potential for Group II (facultative) organisms. The gravel substrate, leaf packs, and woody debris provide suitable habitat for crayfish, damselflies, and other facultative taxa. Score of 6 based on habitat assessment rather than direct observation.

Suitable Habitat: No

Small headwater stream in agricultural setting. Limited habitat diversity reduces potential for species of concern. No mussel beds, heronry sites, or other notable habitat features observed.

No wildlife directly observed. Brush piles on right floodplain could provide small mammal and bird cover. Winter season limits wildlife activity and observation. The stream provides basic aquatic habitat but is small and may have limited fish populations.

Water is slightly turbid with a brown coloration. Substrate is visible through the water in shallow areas (under 1 foot), suggesting clarity of 1-3 feet. No oil sheen, algal mats, or heavy sediment loading visible. The brown color may reflect natural tannin leaching from leaf litter or recent precipitation. Score of 6.

No algae or excessive aquatic plant growth visible. Water is not green-tinted. No algal mats or heavy periphyton visible on substrates. The winter season limits algal growth assessment somewhat. No evidence of nutrient enrichment. Score of 8.

No livestock, manure, or waste evidence visible in the stream or riparian area. The agricultural setting with pasture and barns suggests potential livestock use in the area, but no direct evidence of livestock access to the stream is visible in this panorama. Score of 7 reflecting agricultural land use proximity.

Warmwater stream in agricultural setting. Winter conditions with bare deciduous canopy limit shade assessment. In full leaf season, the sparse tree canopy would provide partial shade. The agricultural barn's metal roof near the stream could contribute to localized thermal effects from roof runoff during storms, but this is a minor concern. No thermal refugia observed. Riparian buffer enhancement would improve shade coverage.

The brush clearing activity appears minor and within the floodplain area. The agricultural barn proximity to the stream is a pre-existing condition. No active construction or unpermitted activity apparent.

Terrestrial Invasives Assessment

Aquatic Invasives Assessment

Winter dormancy makes positive identification difficult. Tangled vine growth visible on the upstream hillside (back face) and around the barn area (front face) is consistent with Japanese honeysuckle, which is extremely common in Middle Tennessee riparian zones. Some shrub forms in the understory could be bush honeysuckle based on branching pattern, but identification confidence is low due to bare-leaf conditions. The dense vine growth on the back/upstream hillside warrants growing-season verification.