WSP10010

• File Number: 8449.700
• Description: Cherry Creek
• State: CO
• Basin: South Platte
• Date: 9/1/1995
• Author: Halepaska & Assoc.
• Title: Phase 1 Baseline Water Quality Data Collection Study for the Upper Cherry Creek Basin - Final Report
• Water Supply Pro - Doc Type: Publication

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final R_lIt. _ I R."""- W_ 0uaJity Ilala c._ Stoclv

Se.._be< 1995

Increases in loadings to the reservoir over some time periods have been
principally related to changes in flow and not due to increases in nitrogen and/or
phosphorus concentrations.

There has been relatively little correlatable change in nitrate-nitrogen and/or
phosphorus loadings as a result of point discharges through the study reach. This
may be related either to the assimilative capacity of these nutrients throughout this
reach, or may simply be related to the low proportion of flow related to direct
discharges compared to total flow.

During the second year of the Phase I baseline study, it is expected that point
discharges will increase and a better correlation of loadings to direct discharges
may develop.

QAlQC results have been within the expected range of values, indicating that the
water quality samples being obtained are representative of conditions in the
Cherry Creek stream channel and the Cherry Creek alluvial aquifer.

It is recommended that the second year of study for the Phase I baseline be
conducted similar to the first year of study to provide consistency in the data
collection effort and in the correlation of flow and water quality data.

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