13 3 5B BOULDER RIVER AT NATURAL BRIDGE 



13 3 5B TOTAL COUNT: 4 00 # OF SPECIES: 3 8 



SWDI : 2.5876 POLLUTION INDEX: 2.79 SILTATION INDEX: 2.5 



D0002 Achnanthes affinis Grun . 



AOOOl Achnanthes austriaca v. helvetica Hust. 



D0046 Achnanthes lanceolata Breb. ex Kutz. 



D0048 Achnanthes lanceolata v. dubia Grun. 



D0056 Achnanthes lapponica v. ninckei (Guerm. et Mang . ) Reim, 



D0063 Achnanthes linearis v. pusilla Grun. 



D0070 Achnanthes minutissima Kutz. 



D1601 Cymbella affinis Kutz. 



D1638 Cymbella minuta Hilse ex Rabh. 



D1641 Cymbella minuta v. silesiaca (Bleisch ex Rabh.) Reim. 



D1657 Cymbella sinuata Greg. 



D2004 Diatoma hiemale v. mesodon (Ehr.) Grun. 



D2615 Eunotia perpusilla Grun. 



D2720 Fragilaria leptostauron (Ehr.) Hust. 



D2726 Fragilaria pinnata Ehr. 



D273 Fragilaria vaucheriae (Kutz.) Peters. 



D2950 Gomphoneis eriense (Grun.) Skv. et Meyer 



D2953 Gomphoneis herculeana v. robusta (Grun.) Cl . 



D3056 Gomphonema angustatum (Kutz.) Rabh. 



D3067 Gomphonema clevei Fricke 



D3300 Hannaea arcus (Ehr.) Patr. 



D3301 Hannaea arcus v. amphioxys (Rabh.) Patr. 



A0013 Melosira italica v. tenuissima (Grun.) Skabitsch. 



D3700 Meridion circulare (Grev.) Ag. 



D3814 Navicula arvensis Hust. 



D3995 Navicula salinarum v. intermedia (Grun.) Cl . 



D4326 Nitzschia dissipata (Kutz.) Grun. 



D4334 Nitzschia fonticola Grun. in Cl . et Moll. 



D4335 Nitzschia frustulum (Kutz.) Grun. 



D43 3 6 Nitzschia frustulum v. perminuta Grun. 



D4352 Nitzschia kutzingiana Hilse 



D4368 Nitzschia paleacea (Grun.) Grun. 



D4411 Nitzschia pura Hustedt 



D5828 Synedra rumpens Kutz. 



D5818 Synedra mazamaensis Sov. 



D3 08 6 Gomphonema intricatum v. pulvinatum (Braun) Grun. 



D3 93 Gomphonema olivaceoides Hust. 



D3094 Gomphonema olivaceoides v. densestriata Foged 



