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<br />, <br /> <br />.. <br /> <br />June 26,2003 <br /> <br />Mr. Tom Browning <br />Colorado Water Conservation Board <br />1313 Sherman Street, Suite 721 <br />Denver, CO 80203 <br /> <br />RE: Proposal For Engineering Services - Crystal River Floodplain <br /> <br />Dear Tom: <br /> <br />Thank you for considering ICON Engineering for the above referenced project. vVe are <br />very interested in working with you and Gunnison County on completing this study. Our <br />proposal is based on your request for the proposal dated May 28, 2003, our subsequent <br />meeting on May 29, and a field reconnaissance completed on June 19, 2003. It is our <br />understanding that the study reach is along the mainstem of the Crystal River extending <br />from the confluence with Lost Trail Creek (upstream of the town of Marble) and <br />extending downstream to the Gunnison County Road 3 crossing near the US Forest <br />Service Boundary, <br /> <br />With your help, we obtained digital files of the base mapping from Kucera West, and <br />have loaded the data into our computer system. It appears that the mapping starts just <br />downstream of the confluence with Lost Trail Creek. Approximately 600 D~et of <br />mapping will need to be extended upstream in order to catch the confluence area, or there <br />will have to be a revision to the study limits, In looking at the mapping, we have located <br />four bridges/culverts crossing the study reach, It is apparent that much of the reach <br />within the Town of Marble is in marshes and wetlands. It appears that the Bear Lake is <br />off-channel, but in close proximity to the river. Based on our conversation, it was <br />decided that Bear Lake will not have a significant impact on the flood hydrology and will <br />not be considered for detention storage in either the hydrologic or hydraulic evaluations, <br /> <br />We completed a brief field reconnaissance of the study area and found that the upstream- <br />most bridge crossing (near Bear Lake) is on private property that is protected by a locked <br />gate. In order to model the bridge, we will need access to that area when we are <br />completing our field survey. At this time, we are assuming that the County or Town will <br />contact the property owner and arrange for us to gain access to the bridge. <br /> <br />In reviewing the information transmitted to us, we have not been able to locate th~: field <br />control used for developing the mapping. For the purposes of this proposal, we are <br />assuming that the CWCB will be able to provide us with this data, so we can complete <br />