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David Berry September 17, 1990 Page 3 MLRD CONCERN: 4. A specific time frame commitment regarding the sediment monitoring if you are unable to obtain water samples due to a lack of flow in the ditch. If the sediment data is not available immediately, the it will be processed by way of another minor revision when available. Response: As per our previous discussion with the Division, CYCC has committed to obtaining water samples from the Homestead Ditch as soon as flow is available for the sample. Because CYCC does not control the flow of irrigation water in the ditch, a more specific time frame for collection of samples is not feasible, other than to again state that samples will be collected at the first opportunity. Data obtained from such sampling will be submitted as a separate revision, due to the current lack of flow in the Homestead Ditch. MLRD CONCERN: 5. The USLE calculation analysis discussed in your cover letter. Response: As previously discussed with the Division, CYCC feels that a USLE calculation may not be totally representative of the area in question, due to the sensitivity of the model to certain parameters. As a result, CYCC is submitting the following data from a survey conducted using the BLM Erosion Condition Classification System (Technical Note #346). CYCC has used this method in the past for assessment of 3 year old reclamation, and feels that the technique is an excellent tool for assessing actual on the ground conditions. As can be seen from the attached sheets, both the Native Pasture Reference Area and the parcel in question (THJ 41-4) fall within the Slight Erosion Condition Class (Table 9, page 15 of Technical Note #346). CYCC feels that those areas which fall into condition classes of stable, slight, or moderate are in satisfactory condition, through high moderate condition class parcels may require subsequent observation. Given that the evaluations were performed shortly after a pair of precipitation events of fairly high intensity, CYCC feels that the evaluation yielded a highly representative assessment of actual conditions on the site. The Division will be interested to note that, even though the events were intense and of somewhat longer duration, areas of concentrated flow which might yield representative samples were not observed, nor did sufficient runoff reach the Homestead Ditch to initiate flow within the ditch.