FLOOD10360 ‎(2)‎

• County: Washington
• Community: Otis
• Title: Preliminary Design, SW Drainageway, Railroad to Washington Street, Town of Otis Colorado
• Date: 1/1/1997
• Prepared For: Otis
• Prepared By: McLaughlin Water Engineers, Ltd.
• Floodplain - Doc Type: Floodplain Report/Masterplan

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

PRELIMINARY DESIGN
SW DRAINAGEW A Y
RAILROAD TO WASIDNGTON STREET
TOWN OF OTIS, COLORADO

PURPOSE

The purpose of this preliminary design project is to evaluate a proposed alignment of the SW Drainageway
within the town of Otis, south of the railroad tracks, The evaluation will include hydraulic analysis,
preliminary construction cost estimates, and comparison to previous designs,

OBJECTIVES

There are three main objectives to accomplish with this evaluation:

1. Overcome local objections to the 1988 and 1993 projects.
2, Design a channel system to have similar capacity to the 1993 design,
3, Design a channel system to have similar costs compared to the 1993 design.

BACKGROUND

A flood control channelization project was designed in 1988 by Norton Underwood and Lamb for the SW
Drainageway within the town limits, A portion of the project, north of the railroad embankment through
Highway 34, was constructed and appears to be perfonning as expected. The area south of the railroad
embankment was found unacceptable to the Town, and the project was canceled, After the 1993 flood,
KLH of Greeley redesigned the channel along the railroad and the crossing at Washington Street. Although
this project was submitted to the Colorado Department of Local Affairs for funding and was approved and
funded, it was also found unacceptable due to objections from some affected property 9wners.

The 1988 design included a new culvert through the railroad embankment, a channel parallel to the railroad
(on the south side) west to Washington Street, a lowered Washington Street, and a channel upstream to Oak
Street following the Elm Street alignment, then turning southwesterly to Dade Street. The design capacity
was near the to-year storm frequency.

The citizens of Otis found the 1988 design unacceptable for two main reasons, The fIrst reason was that
the south railroad access road between Vine Street and Washington Street would be eliminated, The

96-046,OO2/PRELIM