FLOOD06560

• County: Denver
• Basin: South Platte
• Title: River Hydrology, Brown Ditch Weirs
• Date: 5/19/1986
• Prepared By: Wright Water Engineers, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TECHNICAL MEMORANDUM

TO: Mr. N. C. Ioannides, P.E.

FROM: Wright Water Engineers, Inc.

DATE: April 28, 1986

SUBJECT: Evaluation of Existing South Platte River Boat Chutes

This memorandum presents an evaluation of the existing boat chutes and
drops on the South Platte River through Denver. This evaluation was pre-
pared by our team of expert and recreational boaters and represents data
and impressions gained from field investigations including boating of all
the existing chutes. These investigations are of great value in the prep-
aration of viable navigable alternates for consideration at the Brown Ditch
boat chute.

OXFORD AVENUE DAMS

Physical Characteristics:

4' drop at upstream dam

5.7' drop at downstream dam

Dam constructed of two lines
the river, and large angular
stream face.

of sheet piling driven into bedrock across
rock placed on a 10:1 slope on the down-

Boat chutes are constructed on the right side of the upstream dam and
on the left side of the downstream dam. These chutes are constructed
of a series of drops and pools, each drop from 1-2.5' and each pool
between 30-36' long and 15-18' wide, The width of the chute drop is
approximately 15' wide. The chutes are constructed of large (3' - 5')
diameter rounded granite, grouted into place.

Analysis

1.

NaviIabilit:(. Easy to see entrance of chute from upstream due to
the arge slgnal rocks, but once you have entered the chute, you
cannot see the entire drop configuration.

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