Black Branch 2

Small headwater stream in agricultural setting. Appears to support basic aquatic life functions. No obvious impairment indicators but limited riparian buffer on one side and agricultural land use encroachment suggest potential for nutrient and sediment impacts. Bedrock substrate provides some stability.

Channel appears largely natural with no visible engineered alterations. Some minor bank erosion and undercutting observed upstream but no evidence of straightening, riprapping, or channelization. The channel is connected to its floodplain. Slight reduction from 10 due to some bank instability and land use pressures from adjacent agriculture.

Stream appears to have a connected floodplain, particularly on the left bank side where the grassy area appears to be at a level that would flood periodically. Low banks suggest limited incision. The agricultural land use in the watershed may have altered hydrology somewhat through drainage and land clearing, but overall the channel appears to flood its banks regularly.

The bedrock-dominated substrate limits visible sediment deposition. Some fine sediment visible in pools but overall the bedrock channel appears relatively clean. Minor silt accumulation in low-velocity areas. Less than 30% of visible bottom affected.

At this low flow condition, the stream appears dominated by slow-shallow and slow-deep (pool) conditions. No riffles or fast-moving water visible. The low gradient and bedrock substrate with current low flow create primarily slow conditions. Only 2 of 4 regimes observed.

Water is present but at low flow. The channel appears to have water filling approximately 50-75% of the available channel width. Some exposed bedrock substrate is visible at the margins. The water is present as slow-moving pools rather than filling the full channel width.

The stream appears to be a low-gradient system dominated by flat water and pool habitat. No riffles are visible in this scene. The bedrock substrate and low gradient suggest riffle development would be infrequent. Score of 3 reflects the flat water dominance, though this is somewhat expected for this stream type.

This is a small headwater stream with bedrock-controlled morphology. The limestone bedrock substrate dominates the channel form. Low gradient with some sinuosity. The channel appears to be in general equilibrium with its watershed, though agricultural land use has reduced riparian vegetation. Classification confidence is low due to limited view of the reach and difficulty assessing bankfull dimensions at low flow. Could also be classified as a B-type if gradient is slightly higher than appears.

Left bank (viewed in RIGHT image) shows low banks with grass cover extending to near the stream edge. Banks are moderately stable with root protection from grasses, but the mowed/grazed condition limits deeper root stabilization. Some minor scour visible at the bank-water interface. Not heavily eroding but limited woody root protection.

Left bank has approximately 60-70% grass coverage with some bare soil patches visible. The mowing/grazing regime limits natural riparian vegetation development. Some scattered trees but the bank lacks the woody root structure that would provide optimal protection. Moderate disruption from agricultural use.

Left bank is low with grass cover transitioning to mowed/grazed area. Minimal woody riparian vegetation. Some natural bedrock exposure at bank toe provides some stability.

Right bank (viewed in LEFT image and BACK image) shows mixed conditions. Near the barn, the bank is low and vegetated. Upstream, the bank is somewhat higher with moderate erosion and undercutting visible. The upstream view shows exposed soil and root exposure. Some trees are providing root stabilization but limited to scattered individuals. The agricultural barn proximity suggests some land use pressure.

Right bank has mixed vegetation including dormant shrubs, some scattered trees, and dormant herbaceous cover. Approximately 50-65% coverage in winter condition. The narrow buffer between stream and barn limits space for natural riparian development. Some bare soil and dormant vine cover visible.

Right bank has narrow riparian buffer with agricultural barn approximately 30-50 feet from stream. Some undercutting visible upstream. Dormant vegetation in winter makes coverage assessment partially limited.

Left bank riparian buffer is extremely narrow - essentially a single row of scattered trees along the stream bank with mowed grass extending right to the bank edge. Natural woody vegetation is less than 10 feet wide, representing less than 0.33x the channel width. The mowed grass area provides some filtering but minimal compared to natural riparian forest.

Right bank buffer is narrow with scattered trees, shrubs, and vines between the stream and the agricultural barn. Natural vegetation width estimated at 10-25 feet before reaching the barn and agricultural use. This is a very narrow buffer for filtering function, though slightly wider than the left bank.

The floodplain vegetation has been significantly altered from natural state. Left bank is mowed grass with very few trees. Right bank has a narrow strip of natural vegetation before transitioning to agricultural use with a barn nearby. The vegetation is not in its natural state with most of the riparian forest removed for agricultural use.

Currently in winter with bare deciduous canopy, providing minimal shade. Even during the growing season, the scattered trees would provide limited coverage, estimated at 25-40% shade in summer. The left bank with mowed grass contributes essentially no shade. The right bank's scattered trees would provide partial shade. Score reflects the inadequate shade coverage even during peak growing season.

Both banks have inadequate riparian buffers. The left bank has virtually no woody riparian buffer with grass mowed to the bank edge. The right bank has a narrow buffer encroached by an agricultural barn within approximately 30-50 feet. High potential for buffer restoration through planting programs, especially on the left bank where the flat terrain would support establishment of native riparian species.

Approximately 30-50% of visible substrate provides favorable habitat. A large fallen log spans the channel upstream providing good habitat structure. Some undercut banks visible. The bedrock substrate provides stable attachment surface but limited interstitial spaces. Some cobble and root exposure present. The mix of features is moderate.

For this low-gradient system, the substrate is dominated by bedrock with some overlying fine sediment. Some root mats present along banks. Limited submerged vegetation (winter season). The bedrock provides stable substrate but limited interstitial habitat. Score reflects the mix of bedrock with some areas of gravel and fine sediment, and some root exposure.

Pools are present and appear common in this reach, formed by bedrock features and the fallen log. However, pools appear to be shallow (less than 1-2 feet deep based on visibility). Some pool areas have slightly obscured bottoms due to turbidity. The upstream view shows a pool behind the fallen log that may be somewhat deeper. Score of 5 reflects common but shallow pools.

Four fish cover types observed: fallen logs/woody debris spanning the channel, overhanging tree limbs (especially the large tree), undercut banks (upstream view), and root mats along banks. Missing deeper pools, boulder cover, macrophyte beds, and backwater areas. Adequate but not abundant cover diversity.

No barriers to fish movement visible in this scene. The fallen log does not appear to block fish passage. The low flow conditions may seasonally limit fish movement in very shallow areas. No culverts, dams, or drop structures visible. Score of 8 accounts for potential seasonal low-flow limitations.

One large fallen log is prominently visible spanning the channel in the upstream view, appearing to be in moderate decay. Some smaller woody debris scattered in the channel and on banks. The large log is forming a pool behind it. No debris jams observed. Estimated 3-5 pieces in the visible reach. The large tree overhanging the channel provides good future LWD recruitment potential.

Four types of invertebrate habitat present: submerged/partially submerged fallen log (appears moderately decayed, suggesting colonization potential), leaf packs in pool areas (visible leaf accumulation), undercut banks upstream, and some coarse gravel mixed with bedrock. The large log appears to be in moderate decay suggesting it has been in place long enough for colonization. However, the bedrock-dominated substrate limits fine substrate habitats.

Score of 6 assigned based on habitat potential rather than direct observation. The stream has moderate habitat diversity with bedrock, wood, leaf litter, and some gravel substrate that would support facultative invertebrate communities. Agricultural land use may limit more sensitive taxa.

No macroinvertebrates directly observed from panoramic imagery. However, the habitat conditions (bedrock substrate with some gravel, fallen logs, leaf packs, moderate water quality) suggest the stream would likely support Group II facultative organisms. The winter season and low-flow conditions limit visual observation. Score is based on habitat assessment rather than direct observation.

Suitable Habitat: No

Small headwater stream with limited habitat complexity. The agricultural setting and narrow buffers reduce potential for sensitive species. The bedrock substrate could support crayfish and some invertebrate species. The stream may provide habitat for common warmwater fish species during higher flow periods.

No wildlife directly observed during the survey. Winter conditions and presence of survey crew may have reduced wildlife activity. Standing dead wood (snags) and brush piles from fallen branches provide some cover. The agricultural landscape limits overall wildlife corridor function.

Water appears slightly turbid with a brownish tint, which is somewhat typical for low-flow conditions in limestone streams. The bedrock bottom is visible in shallow areas suggesting clarity of 1-3 feet. No oil sheen, foam, or surface films visible. The brown color may reflect tannins from leaf litter or minor suspended sediment. No indication of significant water quality problems.

Water is slightly brownish but not green. Some minor algal growth appears possible on exposed bedrock surfaces but no significant algal mats or blooms visible. No macrophytes observed (winter season may limit growth). The agricultural land use nearby suggests potential nutrient inputs but no obvious enrichment indicators are visible.

No direct evidence of manure or waste in or near the stream. No livestock visible. However, the adjacent agricultural land could be used for livestock based on the barn and pasture-like fields. No fencing preventing potential livestock access observed. No visible manure in the stream or on banks. Score of 8 rather than 10 due to agricultural setting and potential for occasional livestock access.

Currently in winter with minimal shade from bare deciduous canopy. During summer growing season, the scattered trees would provide patchy shade estimated at 25-40%. The narrow riparian buffer, especially on the left bank, significantly limits shading capacity. The agricultural land use provides no thermal buffering. For a warmwater stream, some shade is beneficial but the current condition is marginal. Riparian buffer restoration would improve thermal conditions. The bedrock substrate can absorb and radiate heat during summer. No impervious surfaces nearby to generate heated runoff.

No apparent permit violations observed. The agricultural land use represents a long-standing condition. The narrow riparian buffers may not meet current TDEC standards but no active clearing or degradation observed. The rural agricultural setting appears to be outside typical MS4 urbanized area boundaries.

Terrestrial Invasives Assessment

Aquatic Invasives Assessment

Winter dormancy makes invasive species identification very difficult. Some vine growth visible on right bank shrubs may be Japanese honeysuckle based on growth pattern, but confidence is low. Some shrub forms in the understory on the right bank could be bush honeysuckle but cannot confirm without leaves. The bare-canopy winter condition severely limits plant identification confidence. A growing-season survey would be needed for accurate invasive species assessment.