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-3- / 4. It is reconenended that all future water quality data should include the ~ following information: a. Sample date and analysis date; ~° h b. Field parameters of flow, pH, temperature and electrical g,i~ ) conductivity (EC); \e? c. Information describing instruments used to collect the field `~'~~ parameters; and, a~` d. All analyses sent to a lab for more detailed evaluation should ,F`.;`~ be analyzed for the specific required parameters, and for pH and EC ~`, to verify the field data. ~'~~ 5. The channel cross sections provided with the application are helpful; y+~' however, they are not of sufficient detail to define the actual channel • ~'~",,i configuration of Engleville Gulch. Such information is required to ~~'"\S` establish premining channel morphometry and projected flood plain \' p~: w ~~,~ configurations. Accurate cross sections are also needed to evaluate ~- G the adequacy of the channel reclamation plan and to help locate mine ~ structures at a safe distance from the channel. ~ 6. Cross section C, of Exhibit DD indicates two channels, though Map AA ~•r shows only one channel. Does this reflect the existence of the "ol~ n ~ r ^\h, and "new" channels shown on Map 6? ~ ~ ~,(. ~~ ,~~ ISM/,~~~~ ~~2°' 2.04.7(4) - Alternative Water Supply 6~~}"~~~as~ `' 1. This rule requires that current users of surface water in the area of ~~~~;:.(~~S` ,• the mine must be defined. The maps indicate a diversion labeled the A"~ ~~~~ ':. a.. Montoya Diversion. The applicant should specifically discuss all surface ~-,G~ ~`~~,`~~ water users in the area. Refer also to Rule 2.05.6(3)(ii) pertaining to '\~~+\~_`, the protection of local water user rights. b;~~ ~~ 2.04.8 - Climatological Information S .~ 1. The precipitation values provided in this section appear to underestimate ,~. '~~ the values projected within the publication "Peak Flows in Colorado". ,~, Based on figure S-7 of that publication, the values for the 10 year, "~~•+ 25 year and 100 year, 24 hour precipitation events should be 3.2 inches, . \ 3.6 inches and 4.4 inches, respectively. It is my understanding that ,~~ we previously accepted these values as part of the Applied Hydrology ` ~, Associates product; therefore, it may be difficult to request revised calculations. 2.05.2 - Operations Plan 1. The mining plan and associated maps must be more clearly defined. The ~~,• application indicates both a two phase plan and a three phase plan. ~ The three phase plan indicates that the Engleville Gulch will be mined. Av If the gulch is mined, the operator must provide: ,~~~~" a. A specific plan regarding channel diversion which complies with Rule 4.05.4;