C150208 Feasibility Study

• Contract/PO #: C150208
• Contractor Name: High Line Canal Company
• Contract Type: Loan
• Water District: 17
• County: Otero
• Loan Projects - Doc Type: Feasibility Study

I
I

Lake Engineering Consultants, Inc.
Gary R. Lake, P. E., Principal

I

6923 South Miller Street, #10
Littleton, Colorado 80127

I

Phone:
CeU:
Fax:
E-mail:

[phone]
[phone]
[phone]
[e-mail]

Civ.il, Water Resources and
Geotechnical Engineering
Domestic and Intemational Projects

I

I

July 29, 2005

I

Colorado Water Conservation Board
1580 Logan Street, Suite 750
Denver, Colorado 80203
Attn: Mr. Kirk Russell, P .E.
Marketing

I

RE: Lake Engineering Consultants, Inc. (LEC) Feasibility Report for
High Line Canal Company (HLCC) Smith Arroyo Siphon Pipeline
Crossing Project (project site located in Otero County, Colorado)

I

Kirk:

I

Lake Engineering Consultants, Inc. (LEC) of Littleton, Colorado is herein presenting a Feasibility Report
for the High Line Canal Company (HLCC) Smith Arroyo Siphon Pipeline Crossing Project, which is
located in Otero County, Colorado. This report includes discussions on feasibility-design level evaluations
made for a High Line Canal siphon pipeline replacement project including several alternatives, associated
estimated total project construction costs, and High Line Canal Company (Owner) financial information.

I

At the request of the High Line Canal Company in February 2005, Boesch-Fisher Engineering, Inc. (B-F)
of Highlands Ranch, Colorado and Lake Engineering Consultants, Inc. (LEC) of Littleton, Colorado started
feasibility-level engineering design studies associated with replacing the existing High Line Canal
Company's irrigation siphon pipeline at the Smith Arroyo site. The project team also developed initial
construction cost estimates for several pipeline! appurtenances system alternatives to replace the existing
6-foot nominal diameter concrete-encased wood stave siphon pipeline that has existed since circa 1918.
Knudsen Engineering, Inc. of Morrison, Colorado provided project administration services and was
responsible to represent the Natural Resources Conservation Service (NRCS), should funding become
available from that entity.

I

I

I

Based on preliminary input from B-F, LEC completed an initial hydraulics evaluation of the existing
siphon pipeline system and a hydraulics equivalency evaluation of alternative piping material types and
configurations for eight proposed pipeline replacement alternatives, given the existing wood stave pipeline
system currently in use. For overall cost estimating purposes, the two major variables are the given pipe
material type and the associated earthworks involved in a new replacement pipeline installation. Four
piping configurations were evaluated and included welded steel pipe, two configurations of reinforced
concrete piping (circular pipe and elliptical-shaped pipe) and high-density polyethylene (HDPE) or
polyethylene (PE) pipe. All pipe types and installations evaluated were based on the hydraulic equivalency
to the existing pipeline system. The following feasibility-level design tasks were included:

I

I

I

1) Completion of preliminary siphon pipeline hydraulics evaluation
based on High Line Canal Company input to B-F;

I

I