9593

• UCREFRP Catalog Number: 9593
• Author: Tetra Tech Inc.
• Title: Concept Development Report Hartland Diversion Dam Fish Passage Structure Delta, Colorado.
• USFW Year: 2000.
• USFW - Doc Type: Grand Junction, CO.
• Copyright Material: NO

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there is a significant debris load in the river.
2.6 Site Survey
2.6.1 Diversion Dam
In order to provide the information necessary to analyze the conditions at the Hartland
diversion dam and to produce design drawings, a survey was conducted. The survey was
performed using 1988 N.A.V.D. vertical datum, and 1983 N.A.D. State Plane coordinates. The
following information was obtained: 1) a topographic survey in the immediate area of the
diversion structure, 2) cross sections of the Gunnison River upstream and downstream of the
structure, and 3) detailed measurements and spot surveys of the headgate. The U.S. Bureau
of Reclamation conducted the topographic and cross section surveys in October of 1999.
Tetra Tech, Inc. measured water surface elevations at the surveyed cross sections in
1999 and 2000 for use in the hydraulic calibration model.
2.6.2 Spill Channel
In May of 2000 Tetra Tech, Inc. conducted a survey of the spill channel and the
Hartland Ditch in the vicinity of the spill channel in order to evaluate the feasibility of a fish
screen at this location. The survey was performed using the same datum as the survey
prepared for the diversion dam by utilizing the right end point for cross section 700 as a
benchmark.
Cross sections were surveyed upstream and downstream of the spill channel diversion
as well as in the spill channel itself. In addition, water surface measurements were made at the
Gunnison River, in the spill channel and at the Hartland Ditch to aid in the development of a
calibration analysis for the ditch and spill channel.

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