| Site FB-01 | |||
|---|---|---|---|
| Time Frame | BIBI (Condition) | FIBI (Condition)a | RBP (Condition) |
| 2023 Results | 2.71 (Poor) | -- | 123 (Partially Supporting) |
| Cumulative Average (2016-2023) | 2.00 (Poor) | 2.84 (Poor) | 119 (Partially Supporting) |
| 3-year Running Average | 2.42 (Poor) | 2.84 (Poor) | 136 (Partially Supporting) |
a) Fish data was only collected in 2016 and 2022.
| Site FB-02 | |||
|---|---|---|---|
| Time Frame | BIBI (Condition) | FIBI (Condition)a | RBP (Condition) |
| 2023 Results | 2.14 (Poor) | -- | 144 (Supporting) |
| Cumulative Average (2016-2023) | 1.95 (Very Poor) | 2.00 (Poor) | 102 (Partially Supporting) |
| 3-year Running Average | 2.33 (Poor) | 2.00 (Poor) | 137 (Supporting) |
a) Fish data was only collected in 2016 and 2022.
Site FB-01: Located downstream of the former concrete channel, this site received a BIBI score of 2.71 (Poor) in 2023, continuing a trend of increasing scores post-restoration. Post-restoration benthic communities have been dominated by true flies. Despite the improved score, the 2023 sample was absent of caddisflies and dragonflies/damselflies, both of which have been present in samples in previous years.
FB-01 Summary of Insects Collected by Sample Year:
Site FB-02: This site is located within the former concrete floodway. In 2023, this site received a BIBI score of 2.14 (Poor), a moderate increase from the 2016-2018 pre-restoration scores which correlated to a “Very Poor” condition rating. Similar to sampling years before restoration, the 2023 sample was dominated by true flies and worms.
FB-02 Summary of Insects Collected by Sample Year:
Site FB-01: Fish sampling has occurred twice at this site, in 2016 (pre-restoration) and 2022 (post-restoration). In 2016, the FIBI score was 2.67 (Poor) and only nine individual fish representing three species were observed. In contrast, the post-restoration sample in 2022 resulted in a FIBI score of 3.00 (Fair), with 554 individual fish representing five species collected. Banded killifish (Fundulus diaphanus) was the dominant species in 2022. Notably, this is the only program site where both white sucker (Catostomus commersonii) and creek chubsucker (Erimyzon oblongus) have been found together.
FB-01 Summary of Fish Collected by Sample Year:
Site FB-02: Like FB-01, fish sampling has occurred twice at this site, in 2016 (pre-restoration) and 2022 (post-restoration). In 2016, no fish were found during sampling so the site automatically received a FIBI score of 1.00 (Very Poor). The former concrete channel offered virtually no habitat available for fish. Additionally, the downstream end of the concrete channel was perched approximately 5 feet above the natural channel downstream, a significant barrier to fish movement in this system. Any fish that did attempt to inhabit this reach would likely be flushed out of the system during storm flow conditions, where velocities regularly reached 4 to 5 feet per second even during modest rain events. In 2022, after the removal of the concrete channel and further restoration activities, 150 individual fish representing six species were found, with banded killifish being the dominant species. The 2022 FIBI score was 3.00 (Fair). Similar FIBI scores and species overlap between FB-02 and FB-01 indicate that the restoration project has been successful in reconnecting these once-disconnected reaches.
FB-02 Summary of Fish Collected by Sample Year:
Site FB-01: The RBP score for this site in 2023 was 123 (Partially Supporting), a slight drop from the previous year’s score. The cumulative average score for this site is 119 (Partially Supporting) and the three-year average is 136 (Partially Supporting).
Site FB-02: Because this site was formerly a concrete floodway channel, the RBP habitat condition was previously rated as Non-Supporting. However, with the implementation of the restoration and removal of the concrete channel, this site has seen RBP scores markedly improve. The site received a score of 144 (Supporting) in 2023. The cumulative average score for this site is 102 (Partially Supporting) and the three-year average is 137 (Supporting).
Site FB-01: The cross-section installed for this site in 2006 could not be recovered. A new monumented section was installed in 2016 and future measurements will allow tracking of this site’s stability. An examination of the photos taken in 2006 versus 2016 provides some qualitative support that the channel had widened between 2006 and 2016. A cross-section measurement has not been performed post-restoration as the stream channel is still adjusting to the restoration. Future work, which should begin in 2024, will seek to quantify the maintenance of stability in the restored reach. Due to the lack of data prior to and following restoration, as well as the extensive reconfiguration of the channel during restoration, no cross-sectional overlay diagram is available at this time.
Site FB-02: Prior to restoration, the site was relatively stable as the concrete acted as a bedrock control. A cross-section measurement has not been performed since restoration work was completed, as the stream channel is still adjusting to the restoration. Future work, which should begin in 2024, will seek to quantify the maintenance of stability in the restored reach. Due to the extensive reconfiguration of the channel during restoration and the lack of post-restoration survey data, no cross-sectional overlay diagram is available at this time.
| FB-01 | |||
|---|---|---|---|
| Year | BIBI (Condition) | FIBI (Condition) | RPB (Condition) |
| 2016 | 1.86 (VP) | --- | 114 (PS) |
| 2017 | 1.86 (VP) | --- | 104 (PS) |
| 2018 | 1.00 (VP) | --- | 90 (NS) |
| 2019 | --- | --- | --- |
| 2020 | --- | --- | --- |
| 2021 | 2.14 (P) | --- | 137 (S) |
| 2022 | 2.43 (P) | 3.00 (F) | 147 (S) |
| 2023 | 2.71 (P) | -- | 123 (PS) |
| FB-02 | |||
|---|---|---|---|
| Year | BIBI (Condition) | FIBI (Condition) | RPB (Condition) |
| 2016 | 1.86 (VP) | --- | 71 (NS) |
| 2017 | 1.29 (VP) | --- | 64 (NS) |
| 2018 | 1.57 (VP) | --- | 67 (NS) |
| 2019 | --- | --- | --- |
| 2020 | --- | --- | --- |
| 2021 | 2.43 (P) | --- | 115 (PS) |
| 2022 | 2.43 (P) | 3.00 (F) | 151 (C) |
| 2023 | 2.14 (P) | -- | 144 (S) |
| Station Summary | ||||||
|---|---|---|---|---|---|---|
| Average BIBI (SD)a | 3-Year Average BIBI (SD)a | Average RPB (SD)a | 3-Year Average RBP (SD)a | Average FIBI (SD)b | 3-Year FIBI Average (SD)b | |
| FB-01 | 2.00 (0.59) | 2.43 (0.29) | 119 (21) | 136 (12) | 2.84 (0.23) | 2.84 (0.23) |
| FB-02 | 1.95 (0.47) | 2.33 (0.17) | 102 (40) | 137 (19) | 2.00 (1.41) | 2.00 (1.41) |
a) No data is available for 2019 or 2020.
b) Fish data collected in 2016 and 2022 only.
SD = Standard Deviation