May Biological and Habitat Study of the Olentangy River, 2005 and City of Delaware Dam Removals

Transcription

1 May 2010 Biological and Habitat Study of the Olentangy River, 2005 and 2009 City of Delaware Dam Removals HUC Delaware Run-Olentangy River Delaware County, Ohio OHIO EPA Technical Report EAS/ Ted Strickland, Governor Lee Fisher, Lt. Governor Chris Korleski, Director

2 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Biological and Habitat Study of the Olentangy River City of Delaware Dam Removals HUC Delaware Run-Olentangy River 2005 and 2009 Delaware County, Ohio May 1, 2010 OEPA Report EAS/ prepared by Ohio Environmental Protection Agency Lazarus Government Center 50 West Town Street, Suite 700 Columbus, Ohio Division of Surface Water Ecological Assessment Section 4675 Homer Ohio Lane Groveport, Ohio prepared for U.S. Environmental Protection Agency Measure SP-12 Watershed Reporting Ted Strickland, Governor State of Ohio Chris Korleski, Director Environmental Protection Agency

3 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 TABLE OF CONTENTS ACKNOWLEDGEMENTS... 2 INTRODUCTION... 3 SUMMARY AND CONCLUSIONS... 3 METHODS... 9 RESULTS Fish Community Macroinvertebrate Community REFERENCES APPENDICES Appendix Table 1 IBI Metrics and Scores from Olentangy River sites, 2005 and 2009 Appendix Table 2 Fish Species and Relative Numbers Collected from Olentangy River sites, 2005 and 2009 Appendix Table 3 ICI Metrics and Scores from Olentangy River sites, 2005 and 2009 Appendix Table 4 Macroinvertebrate and Counts Collected from Olentangy River sites, 2005 and 2009 ACKNOWLEDGEMENTS The following individuals are acknowledged for their contribution to this report. Stream sampling: Holly Tucker, Brian Alsdorf, Mike Bolton Data support: Dennis Mishne Report preparation and analysis: Jeff DeShon Reviewers: Marc Smith, Russ Gibson Copies of this report are available at: or by written or request to: Jeff DeShon Ohio EPA, Division of Surface Water Groveport Field Office 4675 Homer Ohio Lane Groveport, Ohio jeff.deshon@epa.state.oh.us 2

4 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 INTRODUCTION A near three mile section of the Olentangy River within the city limits of Delaware, Ohio, was assessed during 2005 and 2009, evaluating fish and macroinvertebrate biological communities and the quality of the physical habitat supporting those communities. This study was undertaken to assess conditions in the Olentangy River upstream, within, and downstream from three low head dam impoundments anticipated for removal. Two of the dams were subsequently removed in late 2005 (River St.) and early 2008 (Central Ave.) with the one remaining dam at Panhandle Rd. scheduled for removal in Results of pre-removal sampling in the vicinity of all three dams (2005 sampling) and post-removal results for the downstream two dams (2009 sampling) are presented here. Specific objectives of the evaluation were to: assess biological and physical habitat conditions in the Olentangy River before and after dam removals, determine the aquatic life use attainment status of the Olentangy River with regard to the Warmwater Habitat (WWH) aquatic life use designation codified in the Ohio Water Quality Standards, and assess the effectiveness and success of the dam removal projects. The Olentangy River is located in the Eastern Corn Belt Plains ecoregion of Ohio. The river is currently assigned the Warmwater Habitat (WWH) aquatic life use designation for the reach sampled during this study. Sampling locations are detailed in Table 1 and graphically presented in Figure 1 and aquatic life use attainment status is presented in Table 2. SUMMARY AND CONCLUSIONS Ohio EPA completed fish and macroinvertebrate sampling near the Central Avenue dam pool, River Street dam pool, and downstream from Panhandle Road dam in both 2005 and Sampling within the Panhandle Rd. dam pool was completed in 2005 and follow-up monitoring is awaiting the removal of the dam scheduled for Removal of the Central Avenue dam in June 2008 and the River Street dam during the winter of 2005 has resulted in improved habitat conditions for both macroinvertebrate and fish communities. The aquatic communities reflect the improved habitat conditions with significant increases in species/taxa richness and the associated biological community index scores (Tables 2 and 4). Physical habitat within the former dam pools improved as reflected by modest increases in Qualitative Habitat Evaluation Index (QHEI) scores pre- and post- removal at the former dam pool sampling locations (Tables 2 and 3). QHEI scores should continue to improve as the free-flowing habitat conditions evolve and stabilize within the prior impounded reaches. With removal of the two dams, full WWH aquatic life use attainment has been realized and the impairment of 0.8 mile within the two former impoundments has been eliminated. In 2005, prior to the River Street dam removal, the fish community within its dam pool (RM 25.8) included no pollution intolerant species while in 2009, 5 pollution intolerant species (black redhorse, silver shiner, stonecat madtom, brindled madtom, and banded darter) were collected in the newly free-flowing reach (Table 4). Index of Biotic Integrity (IBI) scores improved from 34 in 2005 to 46 in 2009 (Table 2). In 2005, the monotypic pool habitat did not provide diverse niches for a variety of species, and the total number of species collected was only 16, while less than 0.5 mile downstream at the free-flowing site (RM 25.4), high quality habitat supported a total of 28 species. Though the habitat is still improving in the reach previously impounded by the River Street dam (Table 3), the total number of fish species increased to 23 in Similar improvements were noted within the Central Avenue dam pool at the sampled location (RM 26.0). In 2005, only one pollution intolerant species (black redhorse) was collected. In 2009, just a little over a year after the dam was removed, five pollution intolerant species (black redhorse, silver shiner, stonecat madtom, brindled madtom, and banded darter) were collected; the total number of species collected increased from 21 in 2005 to 27 in 2009 (Table 4). Similarly, IBI scores increased from 38 in 2005 to 48 in 2009 (Table 2). 3

5 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Macroinvertebrate communities showed significant improvement with the removal of the dams (Tables 2 and 5). The Williams Street site (RM 25.8) improved from an Invertebrate Community Index (ICI) score of 32 in 2005 (pre-removal) to an ICI of 52 in 2009, a little more than three years after the River St. dam was removed. Most significantly, total taxa richness of macroinvertebrates collected during sampling increased from 54 to 94, number of sensitivee taxa increased from 15 to 42, and Ephemeroptera, Plecoptera, and Trichoptera (EPT) taxa increased from 9 to 32 (Figure 2). Similarly, the Central Avenue site (RM 26.0) improved from an ICI of 26 in 2005 (pre-removal) to an ICII of 44 in 2009, a little over one year from the removal of the Central Ave. dam. Total taxa richness of macroinvertebrates increased from 53 to 81, number of sensitive taxa increased from 17 to 39, and EPT taxa increased from 10 to 31 (Figure 2). In addition to the improvements noted in the previously impounded reaches, fish and macroinvertebrate community scores downstream from the Panhandle Road dam (RM 27..5) improved as a result of the removal of the two downstream dams. While this site was always free-flowing, it was bracketed by the Central Avenue and River Street dams less than two miles downstream and Panhandle Road dam less than 0.5 mile upstream. Removal of the two dams downstream has improved fish migration and potentially influenced recruitment into this area as the total number of fish species collected increased from 22 in 2005 to 28 in Pollution intolerant species increased from three (silver shiner, stonecat madtom, and banded darter) in 2005 to four (black redhorse, silver shiner, stonecat madtom, and banded darter) in IBI scores increased from 42 in 2005 to 46 in The macroinvertebrate community also showed improvement with an ICI of 42 (69 total, 32 sensitive, and 31 EPT taxa) in 2005 improving to an ICI of 54 (97 total, 51 sensitive, and 36 EPT taxa) in Of special note at this sampling location is a population of purple wartyback mussels (Cyclonaias tuberculata) first observed during a site visit in 2007 (Bolton 2008) and a first confirmed live population to be documented in the Olentangy River watershed since the late 1800s. Removal of the two downstream dams and anticipated future removal of the Panhandle Road dam upstream should foster an expanded distribution of this freshwater mussel listed by the Ohio Department of Natural Resources as an Ohio Species of Concern. Table 1. Sampling locations in the Olentangy River, Delaware, 2005 and Type of sampling included fish community (F), macroinvertebrate community (M), and river habitat (H). River Mile Type of Sampling F,M,H F,M,H F,M,H F,M,H F,M,H Latitude Longitude Local Landmark Panhandle Rd. bridge Adjacent to Hudson Rd. at road bend Central Ave. bridge Williams St. bridge Adjacent to junction of River St. and Hayes St. 4

6 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Table 2. Aquatic life use attainment status for sampling locations in the Olentangy River at Delaware, Ohio, 2005 and Data from 2005 reflect conditions at sampling locations prior to the removal of the River St. and Central Ave. dams while 2009 results reflect post-removal aquatic life conditions. The Index of Biotic Integrity (IBI), Modified Index of Well-being (MIwb), and Invertebrate Community Index (ICI) scores are based on the performance of the biological community. The Qualitative Habitat Evaluation Index (QHEI) is a measure of the ability of the physical habitat to support a biological community. Sampling locations were evaluated using Warmwater Habitat (WWH) biocriteria codified in the Ohio Administrative Code (OAC , Table 7-15) for the Eastern Corn Belt Plains (ECBP) ecoregion of Ohio. If biological impairment has occurred, the cause(s) and source(s) of the impairment are noted. Sample Location River Mile (RM) Aquatic Life Use Designation Aquatic Life Use Attainment Status IBI MIwb ICI QHEI Aquatic Life Use Impairment Cause(s) / Source(s) Olentangy River Impounded WWH NON 30* 6.1* 20* 55.5 Direct Habitat Alterations, Flow Regime Alterations / Panhandle Rd. Dam 27.5 WWH PARTIAL * Fish-Passage Barrier / Upstream and Downstream Impoundments 26.0 Impounded 25.8 Impounded WWH PARTIAL 38 ns * 45.5 WWH PARTIAL 34* ns 49.0 Direct Habitat Alterations, Flow Regime Alterations / Central Ave. Dam Direct Habitat Alterations, Flow Regime Alterations / River St. Dam 25.4 WWH FULL Olentangy River 2009 a 27.5 WWH FULL Free-Flowing 25.8 Free-Flowing WWH FULL Comment: Central Ave. dam removed in June WWH FULL Comment: River St. dam removed in winter WWH FULL ns BIOCRITERIA (ECBP) INDEX - Site Type WWH EWH IBI: Boat IBI: Wading MIwb: Boat MIwb: Wading ICI * Significant departure from ecoregion biocriterion; poor and very poor results are underlined. ns Nonsignificant departure from biocriterion (<4 IBI or ICI units and 0.5 MIwb units). a To ensure comparability with the 2005 data, only first pass 2009 fish community results for RMs 27.5, 26.0 and 25.8 are presented in this table; second pass electrofishing results are used at RM 25.4 due to first pass sampling effectiveness issues. Data from both 2009 electrofishing passes are included in Appendix Tables 1 and 2. 5

7 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Figure 1. Sampling locations in the Olentangy River, Delaware, 2005 and

8 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Table 3. Qualitative Habitat Evaluation Index (QHEI) scores and physical attributes for fish sampling sites in the Olentangy River, Delaware, 2005 and MWH Attributes WWH Attributes High Influence Moderate Influence River Mile Key QHEI Components QHEI Habitat Rating No Channelization or Recovered Boulder/Cobble/Gravel Substrates Silt Free Substrates Good/Excellent Substrates Moderate/High Sinuosity Extensive/Moderate Cover Fast Current/Eddies Low-Normal Overall Embeddedness Max. Depth >40 cm Low-Normal Riffle Embeddedness Total WWH Attributes Channelized or No Recovery Silt/Muck Substrates No Sinuosity Sparse/ No Cover Max. Depth <40 cm (WD,HW sites) Total High Influence Attributes Recovering Channel Heavy/Moderate Silt Cover Sand Substrates (Boat) Hardpan Substrate Origin Fair/Poor Development Low Sinuosity Only 1-2 Cover Types Intermittent & Poor Pools No Fast Current High/Mod. Overall Embeddedness High/Mod. Riffle Embeddedness No Riffle Total Moderate Influence Attributes (MWH H.I.+1)/ (WWH+1) Ratio (MWH M.I.+1)/ (WWH+1) Ratio Olentangy River Year: Fair Excellent Fair Fair Excellent Olentangy River Year: Good Good Fair Good

9 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, Before Dam Removal After Dam Removal 80 Richness Total Sensitive EPT Central Ave. (RM 26.0) Total Sensitive EPT Williams St. (RM 25.8) Figure 2. Macroinvertebrate total, sensitive, and EPT taxa richness at Olentangy River sites before (impounded) and after (free-flowing) removal of two low head dams in Delaware, Ohio. The Central Ave. (RM 26.0) and Williams St. (RM 25.8) sampling locations are located in upstream reaches influenced by the Central Ave. and River St. dams, respectively. 8

10 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 METHODS All chemical, physical, and biological field, EPA laboratory, data processing, and data analysis methods and procedures adhere to those specified in the Manual of Ohio EPA Surveillance Methods and Quality Assurance Practices (Ohio Environmental Protection Agency 2006b), Biological Criteria for the Protection of Aquatic Life, Volumes II - III (Ohio Environmental Protection Agency 1987b, 1989a, 1989b, 2008a, 2008b), The Qualitative Habitat Evaluation Index (QHEI); Rationale, Methods, and Application (Rankin 1989), Methods for Assessing Habitat in Flowing Waters: Using the Qualitative Habitat Evaluation Index (Ohio EPA 2006a), and Ohio EPA Sediment Sampling Guide and Methodologies (Ohio EPA 2001). Determining Use Attainment Use attainment status is a term describing the degree to which environmental indicators are either above or below criteria specified by the Ohio Water Quality Standards (WQS; Ohio Administrative Code ). Assessing aquatic use attainment status involves a primary reliance on the Ohio EPA biological criteria (OAC ; Table 7-15). These are confined to ambient assessments and apply to rivers and streams outside of mixing zones. Numerical biological criteria are based on multimetric biological indices including the Index of Biotic Integrity (IBI) and modified Index of Well-Being (MIwb), indices measuring the response of the fish community, and the Invertebrate Community Index (ICI), which indicates the response of the macroinvertebrate community. Three attainment status results are possible at each sampling location - full, partial, or non-attainment. Full attainment means that all of the applicable indices meet the biocriteria. Partial attainment means that one or more of the applicable indices fails to meet the biocriteria. Non-attainment means that none of the applicable indices meet the biocriteria or one of the organism groups reflects poor or very poor performance. An aquatic life use attainment table (Table 2) is constructed based on the sampling results and is arranged from upstream to downstream and includes the sampling locations indicated by river mile, the applicable biological indices, the use attainment status (i.e., full, partial, or non-attainment), the Qualitative Habitat Evaluation Index (QHEI), and causes and sources if impairment is indicated. Biological results for the Olentangy River sites were compared to Warmwater Habitat (WWH) biocriteria. River Habitat Assessment Olentangy River aquatic habitat was evaluated using the Qualitative Habitat Evaluation Index (QHEI) developed by the Ohio EPA for streams and rivers in Ohio (Rankin 1989, 1995; Ohio EPA 2006a). Various attributes of the available habitat are scored based on their overall importance to the establishment of viable, diverse aquatic faunas. Evaluations of type and quality of substrate, amount of instream cover, channel morphology, extent of riparian canopy, pool and riffle development and quality, and stream gradient are among the metrics used to evaluate the characteristics of a stream segment, not just the characteristics of a single sampling site. As such, individual sites may have much poorer physical habitat due to a localized disturbance yet still support aquatic communities closely resembling those sampled at adjacent sites with better habitat, provided water quality conditions are similar. QHEI scores from hundreds of segments around the state have indicated that values higher than 60 are generally conducive to the establishment of warm water faunas while those which score in excess of 75 often typify habitat conditions which have the ability to support exceptional faunas. Habitat assessments using QHEI protocols were completed at each Olentangy River fish sampling site. Fish Community Assessment Fish were sampled once (2005) and twice (2009) at each Olentangy River site using pulsed DC wading or boat electrofishing methods depending on physical habitat parameters for each sampling zone Fish were processed in the field which included identifying each individual to species, counting and weighing, and recording any external abnormalities. Discussion of the fish community assessment methodology used in this report is detailed in Biological Criteria for the Protection of Aquatic Life: Volume III, Standardized Biological Field Sampling and Laboratory Methods for Assessing Fish and Macroinvertebrate Communities (Ohio EPA 1989a, 2008b). Macroinvertebrate Community Assessment Macroinvertebrates were collected from artificial substrates and from the natural habitats at the Olentangy River sites in both 2005 and The artificial substrate collection provided quantitative data and consisted of a composite sample of five modified Hester-Dendy multiple-plate samplers colonized for six weeks. At the time of the artificial substrate collection, a qualitative multihabitat composite sample was 9

11 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 also collected. This sampling effort consisted of an inventory of all observed macroinvertebrate taxa from the natural habitats at each site with no attempt to quantify populations other than notations on the predominance of specific taxa or taxa groups within major macrohabitat types (e.g., riffle, run, pool, margin). Detailed discussion of macroinvertebrate field and laboratory procedures is detailed in Biological Criteria for the Protection of Aquatic Life: Volume III, Standardized Biological Field Sampling and Laboratory Methods for Assessing Fish and Macroinvertebrate Communities (Ohio EPA 1989a, 2008b). Fish Community RESULTS A total of 7,533 fish representing 44 species and 8 hybrids were collected from the Olentangy River in the vicinity of three low head dams within the city limits of Delaware, Ohio, between August and September, 2005 and results based on one electrofishing pass were collected at five sites prior to the removal of two of the three dams and the 2009 sampling assessed fish community status at four sites after the removal of the two downstream dams. Results are summarized in Table 4. IBI metrics and scores are presented in Appendix Table 1 and relative numbers and species collected per location are presented in Appendix Table 2. Sampling locations were evaluated using Warmwater Habitat (WWH) biocriteria codified in the Ohio Administrative Code (OAC , Table 7-15). In order to ensure comparability between years, only one of two 2009 electrofishing passes was used to assess results for 2009 and between 2005 and Data from both 2009 electrofishing passes are included in Appendix Tables 1 and 2. Table 4. Fish community summaries based on pulsed D.C. boat and wading electrofishing sampling conducted by Ohio EPA in the Olentangy River, June through September, 2005 and The applicable aquatic life use designation is Warmwater Habitat (WWH). River Mile Index of Modified Sampling Species Species Relative Method (Total) (Intolerant) Number a QHEI Narrative Biotic Index of Evaluation Integrity Well-being Olentangy River Impounded Wading * 6.1* Fair/Poor 27.5 Wading * Good/Fair 26.0 Impounded Boat ns 9.5 Marginally Good/Good 25.8 Impounded Boat * 8.6 Fair/Good 25.4 Wading Very Good/Good Olentangy River 2009 b 27.5 Wading Very Good/Exceptional 26.0 Free-Flowing Wading Very Good/Good 25.8 Free-Flowing Wading Very Good 25.4 Wading Very Good Ecoregion Biocriteria: Eastern Corn Belt Plains (ECBP) INDEX - Site Type WWH EWH IBI: Boat IBI: Wading MIwb: Boat MIwb: Wading * Significant departure from ecoregion biocriterion; poor and very poor results are underlined. ns Non-significant departure from ecoregion biocriterion (<4 IBI units or 0.5 MIwb units). a b Relative numbers are per 1.0 kilometer (boat method) or 300 meters (wading method). To ensure comparability with the 2005 data, only first pass 2009 fish community results for RMs 27.5, 26.0 and 25.8 are presented in this table; second pass electrofishing results are used at RM 25.4 due to first pass sampling effectiveness issues. Data from both 2009 electrofishing passes are included in Appendix Tables 1 and 2. 10

12 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Macroinvertebrate Community The macroinvertebrate communities from the Olentangy River in the vicinity of three low head dams within the city limits of Delaware, Ohio, were sampled in 2005 (prior to removal of two dams) and 2009 (after the removal of two dams) using quantitative (artificial substrate) and qualitative (natural substrate multi-habitat composite) sampling protocols. Results are summarized in Table 5. The ICI metrics with the associated scores and the raw data are attached as Appendix Tables 3 and 4. Sampling locations were evaluated using Warmwater Habitat (WWH) biocriteria codified in the Ohio Administrative Code (OAC , Table 7-15). Table 5. Summary of macroinvertebrate data collected from artificial substrates (quantitative sampling) and natural substrates (qualitative sampling) in the Olentangy River, 2005 and The applicable aquatic life use designation is Warmwater Habitat (WWH). River Mile Olentangy River Density Number/ft 2 Total Total Sensitive Total Tolerant Total EPT a ICI Evaluation 28.2 Impounded * Fair Very Good 26.0 Impounded * Fair 25.7 Impounded ns Marginally Good Exceptional Olentangy River Exceptional 26.0 Free-Flowing Very Good 25.8 Free-Flowing Exceptional Exceptional Ecoregion Biocriteria: Eastern Corn Belt Plains (ECBP) INDEX WWH EWH ICI a EPT=total Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies) taxa richness, a measure of pollution sensitive organisms. * Significant departure from ecoregion biocriterion; poor and very poor results are underlined. ns Nonsignificant departure from biocriterion (<4 ICI units). 11

13 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 REFERENCES Bolton, M. J Discovery of a population of Cyclonaias tuberculata (Rafinesque), the purple wartyback mussel (Bivalvia: Unionidae), in the Olentangy River, Delaware County, Ohio. Ohio Journal of Science 108(3): Ohio Environmental Protection Agency. 2008a updates to Biological Criteria for the Protection of Aquatic Life: Volume II and Volume II Addendum. Users manual for biological field assessment of Ohio surface waters. Div. of Surface Water, Ecol. Assess. Sect., Columbus, Ohio. Ohio Environmental Protection Agency. 2008b updates to Biological Criteria for the Protection of Aquatic Life: Volume III. Standardized biological field sampling and laboratory methods for assessing fish and macroinvertebrate communities. Div. of Surface Water, Ecol. Assess. Sect., Columbus, Ohio. Ohio Environmental Protection Agency. 2006a. Methods for assessing habitat in flowing waters: Using the Qualitative Habitat Evaluation Index (QHEI). Ohio EPA Tech. Bull. EAS/ Div. of Surface Water, Ecol. Assess. Sect., Columbus, Ohio. Ohio Environmental Protection Agency. 2006b. Ohio EPA manual of surveillance methods and quality assurance practices, updated edition. Division of Environmental Services, Columbus, Ohio. Ohio Environmental Protection Agency Sediment sampling guide and methodologies, 2 nd edition. Nov Division of Surface Water, Columbus, Ohio. Ohio Environmental Protection Agency. 1989a. Addendum to Biological criteria for the protection of aquatic life: Volume II. Users manual for biological field assessment of Ohio surface waters. Div. Water Qual. Plan. & Assess., Ecol. Assess. Sect., Columbus, Ohio. Ohio Environmental Protection Agency. 1989b. Biological criteria for the protection of aquatic life: Volume III. Standardized biological field sampling and laboratory methods for assessing fish and macroinvertebrate communities. Div. Water Quality Plan. & Assess., Ecol. Assess. Sect., Columbus, Ohio. Ohio Environmental Protection Agency. 1987a. Biological criteria for the protection of aquatic life: Volume I. The role of biological data in water quality assessment. Div. Water Qual. Monit. & Assess., Surface Water Section, Columbus, Ohio. Ohio Environmental Protection Agency. 1987b. Biological criteria for the protection of aquatic life: Volume II. Users manual for biological field assessment of Ohio surface waters. Div. Water Qual. Monit. & Assess., Surface Water Section, Columbus, Ohio. Rankin, E.T The qualitative habitat evaluation index (QHEI): rationale, methods, and application. Div. Water Qual. Plan. & Assess., Ecol. Assess. Sect., Columbus, Ohio. 12

14 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 APPENDICES 13

15 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Appendix Table 1 IBI Metrics and Scores from Olentangy River Sites 2005 and 2009

16 Olentangy River, 2009 and Wading Sites (Type D) and Boat Sites (Type A) River Mile Type Date Drainage area (sq mi) Total species Sunfish species Number of Sucker species Intolerant species Darter species Simple Lithophils Tolerant fishes Percent of Individuals Top carnivores Omnivores Insectivores DELT anomalies Rel.No. minus tolerants /(0.3km) IBI Modified Iwb Olentangy River - (02400) Year: D 06/24/ (5) 7(5) 4(3) 4(3) 5(3) 20(3) 25(3) 17(5) 12.6(5) 59(5) 0.7(3) 419(3) D 08/12/ (5) 8(5) 6(5) 4(3) 6(3) 20(3) 17(3) 14(5) 13.9(5) 60(5) 0.0(5) 1265(5) D 07/09/ (5) 6(5) 4(3) 4(3) 6(3) 16(1) 11(5) 6(5) 6.9(5) 77(5) 0.0(5) 405(3) D 08/12/ (5) 7(5) 5(3) 5(3) 6(3) 16(1) 24(3) 21(3) 7.7(5) 66(5) 0.0(5) 867(5) D 06/24/ (3) 5(5) 4(3) 3(3) 4(3) 18(1) 12(5) 12(5) 2.4(3) 79(5) 0.0(5) 890(5) D 08/13/ (5) 4(5) 5(3) 5(3) 6(3) 13(1) 24(3) 21(3) 4.9(3) 59(5) 0.1(5) 1683(5) D 06/24/ (3) 6(5) 3(3) 3(3) 3(1) 2(1) 23(3) 16(5) 2.1(3) 73(5) 0.0(5) 437(3) D 08/13/ (5) 7(5) 5(3) 3(3) 6(3) 14(1) 22(3) 12(5) 7.0(5) 69(5) 0.0(5) 971(5) Year: D 07/08/ (3) 5(5) 1(1) 0(1) 1(1) 1(1) 19(3) 49(1) 10.9(5) 27(3) 0.0(5) 125(1) * D 07/08/ (3) 6(5) 2(1) 3(3) 4(3) 15(1) 23(3) 16(5) 13.8(5) 57(5) 0.0(5) 227(3) D 07/26/ (5) 6(5) 3(3) 5(3) 4(3) 19(3) 25(3) 15(5) 7.9(5) 72(5) 0.2(5) 656(3) na - Qualitative data, Modified Iwb not applicable. - IBI is low end adjusted. * - < 200 Total individuals in sample ** - < 50 Total individuals in sample - One or more species excluded from IBI calculation. 1 04/20/2010

17 Olentangy River, 2009 and Wading Sites (Type D) and Boat Sites (Type A) River Mile Type Date Drainage area (sq mi) Total species Number of Sunfish species Sucker Intolerant species species Rnd-bodied suckers Simple Lithophils Tolerant fishes Percent of Individuals Top carnivores Omnivores Insectivores DELT anomalies Rel.No. minus tolerants /(1.0 km) IBI Modified Iwb Olentangy River - (02-400) Year: A 07/27/ (3) 7(5) 5(3) 1(1) 5(1) 5(1) 39(1) 13(5) 11(5) 74(5) 0.6(3) 633(5) A 07/27/ (3) 6(5) 3(3) 0(1) 0(1) 0(1) 36(1) 20(3) 1(1) 76(5) 0.0(5) 880(5) IBI is low end adjusted. * - < 200 Total individuals in sample ** - < 50 Total individuals in sample 2 04/20/2010

18 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Appendix Table 2 Fish Species and Relative Numbers Collected from Olentangy River Sites 2005 and 2009

19 Species List River Code: Stream: Olentangy River River Mile: Location: dst. Panhandle Rd. Time Fished: 6000 sec Drainage: sq mi Dist Fished: 0.40 km Basin: Scioto River No of Passes: 2 Page 1 Sample Date: 2009 Date Range: 06/24/2009 Thru: 08/12/2009 Sampler Type: D Species IBI Feed Breed # of Relative % by Relative % by Ave(gm) Name / ODNR status Grp Guild Guild Tol Fish Number Number Weight Weight Weight Gizzard Shad O M Quillback C O M Silver Redhorse R I S M , Black Redhorse R I S I Golden Redhorse R I S M Northern Hog Sucker R I S M White Sucker W O S T Common Carp G O M T , Golden Shiner N I M T Silver Shiner N I S I Spotfin Shiner N I M Sand Shiner N I M M Bluntnose Minnow N O C T Central Stoneroller N H N Channel Catfish F C Yellow Bullhead I C T Stonecat Madtom I C I Blackstripe Topminnow I M Brook Silverside I M M White Bass F P M Striped Bass E P M Str. Bass X Wh. Bass E White Crappie S I C Black Crappie S I C Rock Bass S C C Smallmouth Bass F C C M Largemouth Bass F C C Green Sunfish S I C T Bluegill Sunfish S I C P Orangespotted Sunfish S I C Longear Sunfish S I C M Pumpkinseed Sunfish S I C P Green Sf X Bluegill Sf Hybrid X Sunfish Logperch D I S M Johnny Darter D I C Greenside Darter D I S M Banded Darter D I S I Rainbow Darter D I S M Fantail Darter D I C Mile Total 1,392 1, Number of Species Number of Hybrids 37 3 OEPA Division of Surface Water Ecological Assessment Unit 04/20/2010

20 Species List River Code: Stream: Olentangy River River Mile: Location: old Central Ave. dam pool Time Fished: 5373 sec Drainage: sq mi Dist Fished: 0.42 km Basin: Scioto River No of Passes: 2 Page 2 Sample Date: 2009 Date Range: 07/09/2009 Thru: 08/12/2009 Sampler Type: D Species IBI Feed Breed # of Relative % by Relative % by Ave(gm) Name / ODNR status Grp Guild Guild Tol Fish Number Number Weight Weight Weight Gizzard Shad O M Quillback C O M Silver Redhorse R I S M Black Redhorse R I S I Golden Redhorse R I S M Northern Hog Sucker R I S M Common Carp G O M T Silver Shiner N I S I Spotfin Shiner N I M Sand Shiner N I M M Bluntnose Minnow N O C T Central Stoneroller N H N Channel Catfish F C Yellow Bullhead I C T Flathead Catfish F P C , Stonecat Madtom I C I Brindled Madtom I C I Brook Silverside I M M White Bass F P M White Crappie S I C Black Crappie S I C Rock Bass S C C Smallmouth Bass F C C M Largemouth Bass F C C Green Sunfish S I C T Bluegill Sunfish S I C P Orangespotted Sunfish S I C Longear Sunfish S I C M Green Sf X Bluegill Sf Hybrid X Sunfish Logperch D I S M Johnny Darter D I C Greenside Darter D I S M Banded Darter D I S I Rainbow Darter D I S M Fantail Darter D I C Mile Total 1, Number of Species Number of Hybrids 34 2 OEPA Division of Surface Water Ecological Assessment Unit 04/20/2010

21 Species List River Code: Stream: Olentangy River River Mile: Location: old River St. dam pool Time Fished: 5100 sec Drainage: sq mi Dist Fished: 0.40 km Basin: Scioto River No of Passes: 2 Page 3 Sample Date: 2009 Date Range: 06/24/2009 Thru: 08/13/2009 Sampler Type: D Species Name / ODNR status IBI Feed Grp Guild Breed Guild Tol # of Fish Relative Number % by Number Relative Weight % by Weight Ave(gm) Weight Quillback C O M Silver Redhorse R I S M Black Redhorse R I S I Golden Redhorse R I S M Northern Hog Sucker R I S M Common Carp G O M T , Silver Shiner N I S I Spotfin Shiner N I M Sand Shiner N I M M Bluntnose Minnow N O C T Central Stoneroller N H N Channel Catfish F C Yellow Bullhead I C T Stonecat Madtom I C I Brindled Madtom I C I Brook Silverside I M M White Bass F P M Striped Bass E P M Rock Bass S C C Smallmouth Bass F C C M Largemouth Bass F C C Green Sunfish S I C T Bluegill Sunfish S I C P Orangespotted Sunfish S I C Longear Sunfish S I C M Green Sf X Bluegill Sf Logperch D I S M Johnny Darter D I C Greenside Darter D I S M Banded Darter D I S I Rainbow Darter D I S M Fantail Darter D I C Mile Total 2,145 1, Number of Species Number of Hybrids 31 1 OEPA Division of Surface Water Ecological Assessment Unit 04/20/2010

22 Species List River Code: Stream: Olentangy River River Mile: Location: upst. Delaware WWTP Time Fished: 6000 sec Drainage: sq mi Dist Fished: 0.40 km Basin: Scioto River No of Passes: 2 Page 4 Sample Date: 2009 Date Range: 06/24/2009 Thru: 08/13/2009 Sampler Type: D Species IBI Feed Breed # of Relative % by Relative % by Ave(gm) Name / ODNR status Grp Guild Guild Tol Fish Number Number Weight Weight Weight Gizzard Shad O M Quillback C O M Silver Redhorse R I S M Black Redhorse R I S I Golden Redhorse R I S M Northern Hog Sucker R I S M Common Carp G O M T , Silver Shiner N I S I Spotfin Shiner N I M Sand Shiner N I M M Fathead Minnow N O C T Bluntnose Minnow N O C T Central Stoneroller N H N Channel Catfish F C , Stonecat Madtom I C I Brindled Madtom I C I Brook Silverside I M M White Crappie S I C Black Crappie S I C Rock Bass S C C Smallmouth Bass F C C M Largemouth Bass F C C Green Sunfish S I C T Bluegill Sunfish S I C P Orangespotted Sunfish S I C Longear Sunfish S I C M Pumpkinseed Sunfish S I C P Green Sf X Bluegill Sf Green Sf X Longear Sf Green Sf X Hybrid Hybrid X Sunfish Logperch D I S M Johnny Darter D I C Greenside Darter D I S M Banded Darter D I S I Rainbow Darter D I S M Fantail Darter D I C Mile Total 1, Number of Species Number of Hybrids 33 4 OEPA Division of Surface Water Ecological Assessment Unit 04/20/2010

23 Species List River Code: Stream: Olentangy River River Mile: Location: upst. Panhandle Rd. Time Fished: 2260 sec Drainage: sq mi Dist Fished: 0.25 km Basin: Scioto River No of Passes: 1 Page 1 Sample Date: 2005 Date Range: 07/08/2005 Sampler Type: D Species IBI Feed Breed # of Relative % by Relative % by Ave(gm) Name / ODNR status Grp Guild Guild Tol Fish Number Number Weight Weight Weight Gizzard Shad O M White Sucker W O S T Common Carp G O M T , Spotfin Shiner N I M Bluntnose Minnow N O C T Channel Catfish F C Yellow Bullhead I C T Brown Bullhead I C T White Bass F P M White Crappie S I C Rock Bass S C C Smallmouth Bass F C C M Largemouth Bass F C C Green Sunfish S I C T Orangespotted Sunfish S I C Longear Sunfish S I C M Green Sf X Longear Sf Longear X Orangespot Hybrid X Sunfish Fantail Darter D I C Mile Total Number of Species Number of Hybrids 17 3 OEPA Division of Surface Water Ecological Assessment Unit 04/20/2010

24 Species List River Code: Stream: Olentangy River River Mile: Location: dst. Panhandle Rd. Time Fished: 3706 sec Drainage: sq mi Dist Fished: 0.25 km Basin: Scioto River No of Passes: 1 Page 2 Sample Date: 2005 Date Range: 07/08/2005 Sampler Type: D Species IBI Feed Breed # of Relative % by Relative % by Ave(gm) Name / ODNR status Grp Guild Guild Tol Fish Number Number Weight Weight Weight Gizzard Shad O M Quillback C O M Northern Hog Sucker R I S M Common Carp G O M T , Silver Shiner N I S I Spotfin Shiner N I M Bluntnose Minnow N O C T Central Stoneroller N H N Yellow Bullhead I C T Stonecat Madtom I C I White Crappie S I C Rock Bass S C C Smallmouth Bass F C C M Largemouth Bass F C C Green Sunfish S I C T Bluegill Sunfish S I C P Orangespotted Sunfish S I C Longear Sunfish S I C M Pumpkinseed X Longear Sf Longear X Orangespot Hybrid X Sunfish Logperch D I S M Greenside Darter D I S M Banded Darter D I S I Rainbow Darter D I S M Mile Total Number of Species Number of Hybrids 22 3 OEPA Division of Surface Water Ecological Assessment Unit 04/20/2010

25 Species List River Code: Stream: Olentangy River River Mile: Location: Central Ave. dam pool Time Fished: 2766 sec Drainage: sq mi Dist Fished: 0.30 km Basin: Scioto River No of Passes: 1 Page 3 Sample Date: 2005 Date Range: 07/27/2005 Sampler Type: A Species IBI Feed Breed # of Relative % by Relative % by Ave(gm) Name / ODNR status Grp Guild Guild Tol Fish Number Number Weight Weight Weight Gizzard Shad O M Quillback C O M Silver Redhorse R I S M , Black Redhorse R I S I Golden Redhorse R I S M White Sucker W O S T Common Carp G O M T , Golden Shiner N I M T Spotfin Shiner N I M Bluntnose Minnow N O C T Yellow Bullhead I C T Brook Silverside I M M White Crappie S I C Rock Bass S C C Smallmouth Bass F C C M Largemouth Bass F C C Green Sunfish S I C T Bluegill Sunfish S I C P Orangespotted Sunfish S I C Longear Sunfish S I C M Pumpkinseed Sunfish S I C P Pumpkinseed X Longear Sf Hybrid X Sunfish Mile Total 312 1, Number of Species Number of Hybrids 21 2 OEPA Division of Surface Water Ecological Assessment Unit 04/20/2010

26 Species List River Code: Stream: Olentangy River River Mile: Location: River St. dam pool Time Fished: 3498 sec Drainage: sq mi Dist Fished: 0.30 km Basin: Scioto River No of Passes: 1 Page 4 Sample Date: 2005 Date Range: 07/27/2005 Sampler Type: A Species IBI Feed Breed # of Relative % by Relative % by Ave(gm) Name / ODNR status Grp Guild Guild Tol Fish Number Number Weight Weight Weight Gizzard Shad O M Quillback C O M River Carpsucker C O M Silver Redhorse R I S M , Common Carp G O M T , Spotfin Shiner N I M Bluntnose Minnow N O C T White Bass F P M White Crappie S I C Smallmouth Bass F C C M Green Sunfish S I C T Bluegill Sunfish S I C P Orangespotted Sunfish S I C Longear Sunfish S I C M Pumpkinseed Sunfish S I C P Longear X Orangespot Hybrid X Sunfish Johnny Darter D I C Sauger X Walleye E P Mile Total 415 1, Number of Species Number of Hybrids 16 3 OEPA Division of Surface Water Ecological Assessment Unit 04/20/2010

27 Species List River Code: Stream: Olentangy River River Mile: Location: upst. Delaware WWTP Time Fished: 4320 sec Drainage: sq mi Dist Fished: 0.20 km Basin: Scioto River No of Passes: 1 Page 5 Sample Date: 2005 Date Range: 07/26/2005 Sampler Type: D Species IBI Feed Breed # of Relative % by Relative % by Ave(gm) Name / ODNR status Grp Guild Guild Tol Fish Number Number Weight Weight Weight Gizzard Shad O M Golden Redhorse R I S M River Redhorse [S] R I S I Northern Hog Sucker R I S M Silver Shiner N I S I Scarlet Shiner N I S M Spotfin Shiner N I M Sand Shiner N I M M Fathead Minnow N O C T Bluntnose Minnow N O C T Central Stoneroller N H N Channel Catfish F C Yellow Bullhead I C T Stonecat Madtom I C I Brindled Madtom I C I Brook Silverside I M M White Crappie S I C Rock Bass S C C Smallmouth Bass F C C M Largemouth Bass F C C Green Sunfish S I C T Bluegill Sunfish S I C P Orangespotted Sunfish S I C Pumpkinseed Sunfish S I C P Logperch D I S M Johnny Darter D I C Banded Darter D I S I Fantail Darter D I C Sauger X Walleye E P Mile Total Number of Species Number of Hybrids 28 1 OEPA Division of Surface Water Ecological Assessment Unit 04/20/2010

28 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Appendix Table 3 ICI Metrics and Scores from Olentangy River Sites 2005 and 2009

29 Olentangy River, 2009 and River Mile Drainage Area (sq mi) Total Mayfly Number of Caddisfly Dipteran Mayflies Percent: Other Dipt/NI Tolerant Organisms Qual. EPT Caddisflies Tanytarsini Ecoregion ICI Olentangy River (02-400) Year: (6) 9(6) 9(6) 17(6) 36.8(6) 33.2(6) 1.1(2) 28.2(4) 0.3(6) 33(6) (6) 10(6) 10(6) 18(6) 27.8(4) 20.5(4) 3.5(2) 47.8(0) 4.6(4) 26(6) (6) 8(4) 7(6) 15(6) 31.3(6) 30.1(6) 5.1(2) 32.2(4) 0.1(6) 31(6) (6) 12(6) 7(6) 21(6) 27.8(4) 31.3(6) 7.0(2) 33.6(4) 1.0(6) 23(6) 5 Year: (4) 1(0) 2(2) 20(6) 0.4(2) 10.6(2) 4.9(2) 83.1(0) 16.9(0) 8(2) (4) 5(2) 7(6) 6(2) 26.3(4) 44.6(6) 2.3(2) 25.2(4) 0.0(6) 31(6) (4) 7(4) 2(2) 14(4) 9.1(2) 6.1(2) 6.3(2) 76.5(0) 4.5(4) 8(2) (6) 4(2) 3(4) 19(6) 32.6(6) 4.7(2) 3.5(2) 58.3(0) 6.8(2) 7(2) (4) 7(4) 7(6) 9(2) 16.2(4) 67.7(6) 2.7(2) 13.3(6) 0.5(6) 28(6)

30 DSW/EAS Olentangy River/City of Delaware Dam Removals May 1, 2010 Appendix Table 4 Macroinvertebrate and Counts Collected from Olentangy River Sites 2005 and 2009