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~ III IIIliiliilillill ~~~ "~ fr~ T~® United States Department of the Interior ~"D~'"® FISH AND WILDLIFC SL'RVICL NATIONAL LCOLOG I' RL:S E.4RCH CINTER ® m 4512 McMurry Avenue Fort Collins, Colorado 80525-3400 In Reply Refer To: FWS/Region 8/NERC June 25, 1991 Robert Baldwin, President West Arapaho Soil Conservation District 730 Simms Street, Suite 416 Golden, CO 80401 Dear Sirs: RWEB: 515.03d 6130.W123 This letter serves as a record of expenditures and progress report of our work a: the Coal Creek site through June 30, 1991. Progress Report: We have continued monitoring of the fifteen wells, with depths-to-water being taken every 2-4 weeks. Attached are schematics (Attachments 1 and 2) showing the groundwater profiles for our four cross- sectioris (please regard these schematics as rough drafts). We have established three crest-stage gages within the study site. As descrit~ed in the last progress report, these gages provide measurements of the highest flows in the stream since the last measurement. Each crest-stage gage wz.s installed with a staff-gage, which allows visual readings of the level of flow (stage) of the stream. The gages are located in the channel of Coal Creek as follows: 1) under the Quincy (Airport) road bridge (bridge ~30- 22.8); 2) approximately a quarter-mile south of Quincy Road and 3) about four-miles south of Quincy Road. To date, we have recorded one significant flow event. This event occurred sometime during the weekend of June 1-2. The stage-level recorded on the gage at the bridge was 1.28 feet. Additionally, we have taken two measurements of stream discharge. We will continue to record stage and discharge in Coal Creek throughout the summer. discharge from stage measurements. This will allow us to relate surface stream flows to ground-water and vegetation patterns. Additionally, 150 meter wide belt transects, also centered on our cross-sections, will be established to monitor trees. These belts will be subdivided into "cells" based on stream geomorphology (see Attachment 3 All trees > 2.5 cm in diameter at breast height, within the cells, will be marked with numbered aluminum tags. These marked trees are to be monitored (e.g., diameter growth, crown vigor) throughout the period of study. To date, we have completed the surveying of two of our four cross-sections. After surveying has been completed, we will then conduct a traverse survey to tie the four cross-sections into established benchmarks. We hope to finish the remaining surveying and tree-tagging by the middle of July. As of June 1, we have initiated the establishment of permanent vegetation monitoring plots. Our approach is to survey in hydraulic cross-sections centered on our four ground-water well cross-sections. These cross-sections will allow us to use hydraulic models (such as HEC-2) to estimate stream Plans: As outlined above, our most immediate plans are to complete the needed :>urveying of the area as well as to define a baseline status for the