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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JCHA

FiII8I ReDOrt. Pba!e I R..tiII;'~ Water 0uaIitY Data Colli!ctiOQ Studv

SeDlember 1995

SELECTION OF SAMPLE SITES

The Phase I study consisted of both surface water sampling in the Cherry Creek channel and
ground water sampling of the associated Cherry Creek alluvial aquifer. Proposed surface water
sampling locations were based on the following criteria:

(I) Locations where previous, or ongoing, flow and/or water quality monitoring has
taken place;

(2) Locations to allow evaluation of specific inputs from wastewater treatment plants,
i.e. surface water locations upstream and downstream of a discharge point; and/or

(3) Locations at bridge crossings where access is facilitated.

Based on these criteria, eight surface water sampling locations were identified in our proposal
for the Phase I baseline water quality data collection study (JCHA, May 16, 1994). These
locations are shown in Figu.re 1.

The Phase I proposal also preliminarily selected ground water monitoring well locations and
proposed that each of the water supply entities that operated the wells selected would be
interviewed to evaluate several factors to see if these wells were compatible with the study being
proposed. The criteria that were evaluated included (a) well construction to assess the screened
interval of the well, (b) proximity of the well to the creek, (c) pump test data on the well to
evaluate site-specific aquifer hydraulic characteristics and (d) any historic water quality or
operational problems that may have been experienced at the well which might preclude its use
from the Phase I study.

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