BOARD01778

• Board Meeting Date: 11/20/2000
• Description: Directors' Reports
• Board Meetings - Doc Type: Memo

Platte River Basin

South Platte Decision Support System Update: a team of five consultants is doing the feasibility
investigation for the SPDSS: e

. Brown and Caldwell: Project Manager
. Camp, Dresser & McKee: Groundwater'
. Helton & Williamsen: Surface Water
. Leonard Rice Consulting Engineers: Consumptive Use
. Riverside Technology, Inc.: GIS.

Initial work has concentrated on producing the Data Collection Report and the Needs Chapter for the
Feasibility Study. The purpose of the Data Collection Report is to detail the necessary data that will be required
for implementing the SPDSS. A preliminary draft of the Data Collection Report has been prepared and is
presently being reviewed by CWCB and Division of Water Resources staff. The revised Draft Collection Report is
scheduled for completion by November 30 and will be submitted to Randy Seaholm, CWCB, and Ray Bennett,
Division of Water Resources. The Data Collection Report's recommendations will form the basis for a FY 2001
budget request for the SPDSS.

A series of meetings with water users throughout the South Platte River basin is now underway to inventory
water users' needs from the SPDSS. It is expected that there will be increased groundwater data and tool needs for
the SPDSS as compared to the Rio Grande and Colorado River Decision Support Systems. In addition, it is
expected that there will be additional needs concerning municipal areas in lhe South Platte River basin as
compared to previous decision support systems in the Rio Grande and Colorado River basins.

The final Feasibility Report for the SPDSS is scheduled for completion in 2001.

Chatfield Storage Reallocation Feasibility Study Update: Simons Associates, Inc., the Corps and t~
CWCB study contractor, continues working on the creation of the hydraulic river model using the HEC RAS
program, started the environmental evaluation, and inventoried the existing facilities and public utilities for the
Chatfield Reservoir Recreational Areas. The contractor has requested that the CWCB prepare the "Scope of
Services" for the Water Availability Study. The Steering Committee membership has been selected and was
presented in the September CWCB Director Report.

Cherry Creek Dam Safety PMP Technical Review Update: The Cherry Creek PMP Selection
Committee has accepted the Applied Weather Associates, Monument, Colorado, proposal for the perform of the
technical review for the PMP Site-Specific Study for Cheery Creek Reservoir. The Corps of Engineers and
National Weather Service July 13, 1995 PMP study has received much criticism from the Colorado interests and
is one of the reasons for the CWCB involvement. This project will be of much interest to the landowners
upstream and downstream of the Cherry Dam. Staff is working with the consultant to finalize the "Scope of
Services" for the contract. The consultant has presented a very qualified team of climatologists, meteorologists,
and hydrologists.

Sterling Flood Control Project Update: The City of Sterling has given ICON Engineering, Inc.
(City/CWCB study contractor) the "Notice of Proceed" with the final design and construction drawings for the
Pawnee Creek Flood Creek Flood Control Project. Since, the CWCB approval and legislative authorization
there have been a number of public meetings regarding landowner acceptance of the selected planned. Senator
Allard's staff is conducting a general informal meeting on Nov. 15 to address landowner concerns. The big
issue is upstream reservoir versus a localized protection project. The feasibility study found the upstream
reservoirs proposal to be a non-feasible alternative by a wide margin. The cost/benefit ratio was 0.1.\0 1.0 for_
the reservoir alternative. The localize protection alternative will provide the City of Sterling with 100- flood ..
protection from Pawnee Creek Overflows.

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