Black Branch 2

Small headwater stream in agricultural setting. Narrow riparian buffers on at least one side suggest potential for agricultural runoff impacts. Bedrock-dominated substrate with limited habitat diversity.

Channel appears natural with no visible structural alterations, straightening, or artificial armoring. Some minor bank erosion but no evidence of active downcutting. The channel maintains natural planform. Score of 7 rather than 10 because some lateral erosion is evident and the agricultural land use may have historically influenced channel form.

Channel shows slight incision with banks 2-4 feet above the current water level. The stream appears to maintain some floodplain connection, particularly on the left (agricultural) side where banks are lower. The agricultural land use and potential drainage modifications in the watershed likely have some hydrologic effect on flow regime.

Bedrock-dominated substrate limits obvious sediment deposition. Some fine sediment visible in low areas between bedrock ledges. Limited evidence of active bar formation. The bedrock nature of this reach likely transports sediment through rather than accumulating it. Score of 6 reflects that fine sediment is present but not dominant.

At current low flow conditions, the stream is dominated by very shallow flow over bedrock. Only slow-shallow and possibly fast-shallow regimes are present. No deep water areas are visible. The bedrock substrate and low water levels severely limit depth diversity.

Water is present and flowing but does not fill the full channel width. Significant amounts of bedrock substrate are exposed along channel margins. The stream maintains flow but at low baseflow conditions, leaving approximately 25-50% of the channel bed exposed.

The bedrock substrate creates a relatively uniform flow pattern. While there may be some variation where bedrock ledges create minor riffles, the visible reach shows predominantly flat, shallow runs over bedrock with limited riffle-pool complexity.

Small headwater stream with bedrock-controlled channel. The bedrock substrate limits channel adjustment and maintains a relatively stable planform. The asymmetry between the low agricultural left bank and the steeper wooded right bank suggests the stream may be migrating leftward over time. The low gradient and bedrock substrate place this between Rosgen B and E types. Classification confidence is low due to limited view of the reach.

Left bank is relatively low (under 3 feet) and mostly stable but with moderate erosion visible. Root exposure is evident in some areas. The thin riparian buffer and proximity of agricultural land means limited deep root protection. Banks are not actively failing but show signs of ongoing erosion.

Vegetative coverage is estimated at 50-70% on the left bank. The narrow riparian buffer transitions quickly to open pasture/agriculture. Trees present are sparse, with eastern red cedar and some deciduous species. Dense vine/shrub tangles in the understory provide some protection during growing season but are bare in winter. Bare soil patches visible along the bank.

Left bank has a very narrow riparian buffer (estimated 10-30 feet) before transitioning to open agricultural/pasture land. Bank is low but showing moderate erosion. The proximity of agricultural land use is the primary concern for this bank.

Right bank is steeper (3-6 feet) but appears more stable than the left bank, supported by denser tree cover and deeper root systems from mature trees including sycamore. Some minor erosion visible but no active bank failures. The steeper hillside provides natural containment.

Right bank has denser tree and shrub coverage, estimated at 70-90%. The wooded hillside extending beyond the immediate riparian area provides a wider, more continuous buffer. Native species appear dominant with sycamore, and other deciduous species. Dense vine/shrub understory. Some possible invasive honeysuckle in the understory but not dominant.

Right bank is steeper but better vegetated and more stable than the left bank. Wooded hillside extends well beyond the riparian zone providing excellent buffer on this side. The asymmetry between left and right bank conditions is notable.

Left riparian buffer is very narrow, estimated at only 10-25 feet of tree/shrub cover before transitioning to open agricultural/pasture land. For a channel approximately 6-8 feet wide, this represents roughly 1.5-4x channel width but the buffer is sparse and filtering function is compromised by the narrow width and sparse density.

Right riparian zone extends up a wooded hillside with an estimated 50-100 feet of tree and shrub cover. This provides substantial buffer between the stream and any upland land use. The wooded hillside appears continuous and well-vegetated.

Mixed conditions - right bank has good riparian vegetation while left bank has a compromised, narrow buffer. The overall floodplain vegetation is fair with some trees and shrubs present but the agricultural encroachment on the left side significantly reduces the overall rating.

In winter bare condition, shade is limited. However, during the growing season, the deciduous trees (particularly on the right bank) and cedar trees would provide approximately 40-60% canopy cover. The narrow left bank buffer limits shade from that side. Score of 6 reflects the moderate shade provision during growing season.

The left bank buffer is the primary concern. Agricultural/pasture land extends within the 30-foot buffer zone on the left bank. This is a high-priority area for buffer restoration through riparian planting. The right bank buffer meets TDEC standards.

The bedrock-dominated substrate provides limited favorable colonization habitat for epifaunal organisms. While bedrock surfaces can support some periphyton and invertebrates, the lack of cobble, logs, snags, and diverse substrate limits colonization potential to approximately 20-40%. Some undercut banks and root wads along the margins provide limited refuge habitat.

Using low-gradient criteria, the substrate is predominantly bedrock with some gravel in pockets. This is between the bedrock-dominated condition (score 1) and gravel/sand condition (score 7). Some root exposure along banks provides limited root mat habitat. The bedrock provides stable but relatively unproductive substrate. Score of 5 reflects the mixed bedrock/gravel condition.

The visible reach shows very shallow water with the entire bottom easily discernible. No deep pools are evident. The bedrock substrate and low gradient limit pool formation. At current low flow, the stream is essentially all shallow run over bedrock with perhaps some minor depressions holding slightly deeper water.

Fish cover is limited to approximately 3 types: some undercut banks, overhanging vegetation (shrubs/vines at bank edge), and root mats along bank margins. No deep pools, significant woody debris, boulders, or macrophyte beds are visible. The bedrock substrate provides minimal cover for fish.

No barriers to fish movement are visible within this reach. The bedrock substrate is relatively flat with no significant drops or grade changes. However, the very shallow water at current low flow conditions could seasonally limit fish movement, warranting a score of 8 rather than 10.

Very little large woody debris is visible in the stream channel. Small branches and twigs are present but no substantial logs, snags, or debris jams. The narrow channel and active clearing by flows likely prevents accumulation. Only small-diameter, recently fallen material is visible.

Invertebrate habitat is limited. Only 2 habitat types identified: some undercut banks along margins and leaf pack accumulations in low areas. The bedrock-dominated substrate provides limited interstitial space for invertebrates. No cobble, coarse gravel, submerged logs, or fine woody debris accumulations visible in the channel. Winter leaf fall provides some temporary leaf pack habitat.

Habitat suggests a facultative invertebrate community could be supported. Bedrock with some gravel pockets, leaf packs, and undercut banks provide moderate but not excellent habitat. The agricultural influence and limited habitat diversity suggest Group II organisms would be most expected.

No macroinvertebrates directly observed from imagery. Score of 6 assigned as default for habitat assessment only, representing expected facultative community based on habitat conditions. Actual macroinvertebrate sampling would be needed to confirm. The bedrock/gravel substrate with some organic matter accumulation suggests a mixed community would be expected.

Suitable Habitat: No

Small headwater stream with limited habitat complexity. The bedrock substrate and shallow water limit habitat for most species of concern. No mussel beds, significant fish habitat, or specialized habitats observed.

No wildlife directly observed. Winter dormant season and human presence likely reduce wildlife visibility. The dense shrub/vine tangles provide potential small mammal and bird cover. The stream likely supports small fish and invertebrate populations but is limited by habitat simplicity.

Water is slightly turbid with a brownish tint, likely from dissolved organics and minor fine sediment. The stream bed is visible through the shallow water. No sheen, film, or algal mats are visible. The brown coloration appears natural for a stream draining partially agricultural land with limestone geology. Clarity appears to be in the 1-3 foot range in the deeper areas.

No obvious signs of excessive nutrient enrichment. Water is slightly brown but not green. No macrophyte beds visible, and only minor algal growth is apparent on substrate surfaces. The winter season may mask nutrient enrichment effects that could be more visible in warmer months. The adjacent agricultural land use suggests potential for nutrient inputs, but current visual indicators are not alarming.

No direct evidence of manure or livestock waste visible in the stream or on banks. The adjacent agricultural land appears to be cropland or hay field rather than active pasture, which is positive. No livestock fencing damage or trampled banks are visible. However, the proximity of agricultural activity means some nutrient and sediment transport potential exists. Score of 7 rather than 10 because the agricultural proximity creates some risk.

This is a warmwater stream in a rural agricultural setting. During winter, shade is minimal due to deciduous leaf-off. During growing season, the right bank trees would provide moderate shade, while the left bank has limited shading capacity due to the narrow buffer. The shallow water depth over bedrock makes the stream susceptible to temperature fluctuations. The open agricultural field on the left side likely contributes to increased solar exposure. Riparian buffer restoration on the left bank would improve shade and thermal regulation.

No active permit violations or construction-related concerns observed. The narrow riparian buffer on the left bank may be a regulatory concern depending on local buffer ordinances.

Terrestrial Invasives Assessment

Aquatic Invasives Assessment

Confidence is low due to winter dormant season making positive identification very difficult. The dense vine and shrub tangles visible in the understory are consistent with multiflora rose and bush honeysuckle, which are extremely common in Middle Tennessee riparian areas. Japanese honeysuckle vines are also likely present in the vine tangles. Growing-season survey recommended for definitive invasive species assessment.