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Larry Damrau =3- January 23, 1985 8. Page 2.04-24 indicates that data for Gaging Station 1003 is contained ~~/~ in Table 28, Surface Water Monitoring Data. No such data v+as found in Table 23. 9. Figure 7, Stream Flow Hydrographs, contains data for Fish Creek only, G /,r not three streams as referenced on page 2.04-24. ('~ ~`~Ka~• ~ ~/ '~ 10. No discussion is contained in Seasonal Variations in Water Quality, ~ pages 2.04-25 and 26, of the change in water quality observed upstream on Fish Creek. See comment 7 above. ~~ f'/e 11. The Trilinear Diagram for Surface Water, Figure 9 shows water of a mixed type, calcium-sodium sulfate not calcium bicarbonate. Please clarify.. If this is correct, then the surface water quality is not all that similar to _ the ground water quality as stated on page 2.04-22. 12. Site 15 is found in Tables 28 and 29 and yet not mentioned in Table 34 ~ as being part of the monitoring schedule. Please clarify. 13. The only water quality data presented in Table 30, Ground Water Quality ~• Data, is for Well No. AU-3. At the very least historical water quality for Well ilo. 008-A4l-3 should be submitted. 14. It is not clear from the permit application whether or not surface water flow will be monitored at all sites or just at Gaging Station 1003. At minimum a flow measurement should be taken when water quality samples are ~ taken. See stipulation number 2 in the draft findings document. ~o-(iLr,`~•~ 15. ?Jo historir. data was presented . ~ pf IUD (Uad> for siten100.3 in the per•nit The following items have been identified as problems. Any changes that are needed must be incorporated into the permit application. 1. No culvert designs were presented with the permit application. - ~ ~~'`~~ ~ lL ~~ 2. While the two culverts conveying flours from i~iddle Creek each separately have end areas less than 35 square feet, the total end area is greater than 35 square feet. Have these culverts been designed to handle the 20 year - 24 hour storm flows? Tlie designs must be presented in tfie permit application. 3. Is all surface runoff from the haul road "conveyed to a detention basin" as per the last paragraph on page 2.05-10? Do ditches E2 and E3 convey ~~ flows from the haul road to a detention basin prior to being re]ease into the `, natural drainage? What measures are utilized in the portion of haul road between County Rio d No _1` and where Ditch P-1 starts? The detention basins should be identified on Map 5, Fish Creek Tipple Hydrology.