Black Branch 2

Small headwater stream in agricultural/rural residential setting. Minimal riparian buffer on both sides suggests potential for sediment and nutrient inputs. Stream appears to maintain baseflow but habitat is limited by small channel size and lack of diverse features.

Channel appears largely natural with no visible structural modifications. However, the adjacent mowed lawn and agricultural land use suggest the surrounding landscape has been altered, potentially affecting channel form historically. The channel shows minor incision but is generally well-connected to its floodplain. No straightening, riprap, or concrete visible.

The stream shows slight incision with banks approximately 2-3 feet above baseflow. The channel appears to have some floodplain connection but the low banks and surrounding flat terrain suggest periodic overbank flooding is still possible. Adjacent land use (mowed lawn, pasture) may contribute to altered hydrology through increased runoff.

Minor sediment deposition visible with silt and mud along channel margins. The bed shows a mix of limestone fragments and fine sediment. Some fine sediment infilling around coarser substrate is evident but not excessive. Approximately 10-20% of the bed appears to be affected by fine sediment deposition.

The very narrow, shallow channel supports only shallow flow regimes. No deep pools are visible and the uniform low gradient limits velocity diversity. Only slow-shallow and possibly fast-shallow (over rock substrate) regimes are present.

Water is present but does not fill the entire channel. Some exposed substrate and bank toe areas are visible, particularly around limestone fragments. Approximately 50-75% of the channel cross-section contains water at this low-flow condition.

The channel appears dominated by uniform runs with occasional areas where limestone fragments create minor turbulence. True riffle-pool sequences are not well developed at this headwater scale. Some minor riffles may form over exposed bedrock but they are not frequent or well-defined.

This is a very small headwater stream that is difficult to classify with high confidence using Rosgen methodology at this scale. The channel characteristics suggest a type E (low gradient, narrow, sinuous) but could also be classified as a small C type. The limestone bedrock influence may control channel form. The broad flat valley with low banks and perennial flow are consistent with an E-type classification.

The left bank (looking downstream) appears to be the side adjacent to the residential property with mowed lawn. The bank is moderate height (3-6ft based on the right-face image showing steep drop from lawn). Some minor scour erosion is evident where grass gives way to bare soil at the bank edge. Root protection is limited due to the predominance of shallow-rooted grass rather than deep-rooted trees or shrubs.

Bank vegetation is predominantly mowed grass with a few scattered trees. While coverage is present, the quality of protection is low — shallow-rooted grass provides minimal bank stabilization compared to woody vegetation. Vegetation cover approximately 60-70% with some bare soil patches at the bank edge. Invasive vines appear present along the bank top.

Left bank (residential side) has minimal riparian buffer with mowed lawn extending nearly to stream edge. Bank is steeper here due to slight incision. Scattered trees provide some root stabilization but coverage is inadequate.

The right bank (looking downstream, pasture/agricultural side) appears slightly more stable with lower bank height and more gradual slope. Herbaceous and grass vegetation provides moderate protection. Bank height is lower on this side (under 3ft). Some root exposure but no active mass wasting or severe erosion.

Right bank has more natural herbaceous vegetation and some scattered trees. While grass provides ground cover, the lack of woody vegetation limits deep root protection. Vegetation cover approximately 70-80% with dormant grass and herbaceous plants. Some bare areas along the bank toe. Overall better than the mowed left bank but still lacking adequate woody riparian cover.

Right bank (pasture side) has more natural herbaceous cover but still lacks adequate woody riparian vegetation. Bank is lower and more gradually sloped than left bank. Dormant grass and tall herbaceous vegetation provide seasonal protection.

The left riparian zone (residential side) is severely compromised. Mowed lawn extends nearly to the stream bank with only a few scattered trees along the immediate bank edge. Natural riparian vegetation width is likely under 10 feet — essentially just the bank face itself. This is well below the TDEC 30ft minimum buffer standard.

The right riparian zone (pasture side) has slightly more natural vegetation including tall herbaceous growth and scattered trees, but the buffer transitions quickly to open pasture/field. Estimated width of natural vegetation is approximately 10-25 feet before transitioning to grassland/pasture. Still below TDEC 30ft minimum.

Floodplain vegetation is in a marginal state. Most trees and shrubs have been removed or are very sparse. The landscape is dominated by mowed grass (residential side) and dormant pasture grass/herbaceous vegetation (agricultural side). The natural riparian forest community has been largely eliminated.

Even during leaf-on season, the sparse scattered trees would provide minimal canopy coverage over this narrow stream. Current winter conditions show essentially no shade. During growing season, estimated shade would be under 25% based on the widely spaced, small-diameter trees present. This is a warmwater stream so some sunlight is beneficial, but the lack of any meaningful canopy is below desired conditions.

Both banks fail to meet TDEC MS4 permit section 4.2.5.4 minimum buffer requirements. The left bank has severe encroachment from residential lawn maintenance extending to within feet of the channel. The right bank has moderate encroachment from pasture/agricultural use. Both sides have high restoration potential if willing landowners can be engaged for buffer planting programs.

Limited favorable substrate for colonization. Some limestone fragments and small cobble provide attachment surfaces but the channel is very narrow with limited habitat diversity. Approximately 20-30% of substrate is favorable. Minor woody debris and a few exposed roots offer some additional habitat.

The substrate shows a mix of limestone fragments, gravel, and fine sediment. Some cobbles and gravel are partially embedded (25-50%) in fine sediment. The stream bed is not purely bedrock or clay but has moderate fine sediment infilling around coarser materials.

Pools are essentially absent in this headwater stream. The entire stream bottom is discernible due to the very shallow depth (a few inches at most). Any minor depressions would be classified as very shallow pools at best. The channel lacks the size and gradient variation needed to develop meaningful pool habitat.

Limited fish cover types available. Some overhanging bank vegetation (grass), minor root exposure, and occasional riffles over rock substrate provide the primary cover. No deep pools, large woody debris jams, undercut banks, or macrophyte beds observed. The very small stream size inherently limits the number and quality of cover types.

No barriers to fish movement are visible within the immediate reach. However, this is a very small headwater stream that may experience seasonally low flows limiting fish passage. Being at position 46 of 53 (88% through the reach), barriers may exist upstream or downstream beyond this view.

Sparse woody debris present, primarily small fallen branches visible in the front view crossing the channel. No debris jams observed. Most pieces are small diameter (<6 inches) and appear relatively fresh. The sparse tree canopy limits potential woody debris inputs. No pool-forming debris structures present.

Only 2 types of invertebrate habitat are readily identifiable: coarse gravel/limestone fragments and some fine woody debris. The channel lacks leaf packs (winter conditions, sparse tree canopy limits leaf input), submerged logs, undercut banks of significant size, and boulder habitat. The very small channel size limits habitat diversity.

Score assigned at the midpoint (Group II assumed) based on available habitat. Limestone substrate and perennial flow provide conditions suitable for some facultative taxa. However, limited riparian inputs and sparse habitat diversity would limit community development. Field sampling would be needed to confirm.

No actual macroinvertebrates can be identified from the imagery. Score based on habitat assessment only — the limestone substrate and flowing water suggest Group II organisms could be present, but this cannot be confirmed visually. Winter conditions may reduce visible invertebrate activity.

Suitable Habitat: No

This heavily modified headwater stream in an agricultural/residential setting has limited potential to support species of concern. The lack of riparian buffer, minimal instream habitat diversity, and small channel size reduce wildlife habitat quality. However, headwater streams can serve as important corridors and nursery habitat for some species.

No wildlife directly observed. Winter conditions and time of day may limit wildlife visibility. The surveyor's presence likely also reduced wildlife activity in the area.

Water appears slightly turbid with a brownish tint. The shallow depth makes clarity assessment challenging but the bottom is visible through the water. The brown color may be from natural tannins and suspended fine sediment. No algal growth, oil sheen, or unusual discoloration observed. Water quality appears acceptable for dry weather conditions in a rural headwater stream.

No significant evidence of nutrient enrichment. Water is slightly brown but not green. No algal mats, excessive macrophyte growth, or signs of eutrophication visible. Minor algal growth may be present on rock surfaces (difficult to assess in winter). The adjacent agricultural/pastoral land use could contribute nutrients but no acute enrichment signs are present at this time.

No direct evidence of manure or animal waste in the stream or on banks. However, the adjacent pasture/agricultural land with a barn visible in the distance suggests potential for livestock access. No livestock are currently visible and no manure, hoof prints, or bank trampling damage is evident at this location. Fencing status is unclear.

This small headwater stream receives minimal shade year-round due to sparse riparian canopy. During summer, the lack of shade combined with the very shallow depth makes this stream vulnerable to thermal stress. The limestone substrate may provide some thermal buffering through groundwater interaction. Riparian planting would be the most effective thermal management action.

No active permit violations observed. The inadequate riparian buffer is a chronic condition rather than a recent disturbance. Ongoing lawn mowing to the stream bank could be addressed through MS4 outreach programs.

Terrestrial Invasives Assessment

Aquatic Invasives Assessment

Identification confidence is low due to winter dormancy. The green shrub visible in the front view along the right bank could be privet (Ligustrum) or bush honeysuckle (Lonicera maackii) based on its semi-evergreen appearance in winter, which is characteristic of these species in central Tennessee. Some vine-like growth along bank edges could be Japanese honeysuckle (Lonicera japonica). A growing-season survey would be needed for definitive identification.