FLOOD10386

• County: Jefferson
• Community: Golden, Lakewood
• Stream Name: Upper Lena Gulch
• Basin: South Platte
• Title: FHAD - Upper Lena Gulch
• Date: 1/1/1993
• Prepared For: UDFCD
• Prepared By: Boyle Engineering Corporation
• Floodplain - Doc Type: Floodplain Report/Masterplan

BASIN CHARACTERISTICS

II.

I

I

the lower

Channel slopes in

mile.

per

feet

basin exceed 400

the upper

Channel slopes In

I

Lena

mile. At its widest point the Upper

GUlch basin is approximately 3.6 miles wide with an overall length of approximately 7 miles

portion of the basin average approximately 80 feet per

tion

Area Descri

Stud

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The developed areas in

I

residential and commercial

portion of the basin are primarily

the lower

Mountain in

slopes of Lookout

the southeast

its headwaters in Apex Gulch on

Lena Gulch has

approximately 32

An average of

light-industrial land use are also present.

Some areas of

its confluence

flows northeast to

the main stream

Mountain

Golden. Colorado. From Lookout

I

of the lower basin is impervious areas

percent

in Wheat Ridge. Colorado.

Creek downstream of Kipling Street

with Clear

I

tion

1

Figure

Maple Grove Reservoir.

Lena Gulch upstream of

the portion of

This study deals with

I

Lena Gulch is located in

Upper

the basin boundary

the study area location and

shows

Lena Gulch

the mainstem of

This study covers approximately 6.5 stream miles; 5.2 miles on

View

the Pleasant

0.7 miles on

joined

The mainstem is

Golden and Lakewood

Jefferson County and portions of the cities of

I

Lena

The Upper

tributary, and 0.5 miles along Apex Gulch

Gulch basin above Maple Grove Reservoir

two

This study Includes evaluations of

by three major tributaries and several small drainages

I

(9.73 square

consists of approximately 6,230 acres

with a wide range of topographic features

miles)

third major tributary,

The

tributary

View

the Pleasant

Apex Gulch and

of the major tributaries

Figure 2 shows the location and alignment of

reach locations as used in this study.

the drainageways and the

Drainageway Planning

1978) and is not included as part of this study

(Major

tributary, has been evaluated previously

Green Mountain Area, UDFCD

the Green Mountain

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Lena Gulch follows a northerly alignment along U.S. Highway 40

The main channel of

I

from near

the Intersection with Interstate 70 to a point

part of the basin

the upper

Lena Gulch in

tributary joins the mainstem of Upper

The Apex Gulch

I

it joins with Apex Gulch and

downstream where

View

The Pleasant

downstream of the U.S. Highway 93 crossing

just

Golden

the City of

in

The channel continues

the Hogback

formation known as

through a geologic

downstream

crosses

Its

Lena Gulch on the south slopes of South Table Mountain

the north of

tributary is located to

I

residential and

mixed

direction crossing several streets and

in an easterly

the property of the Camp

confluence with Lena Gulch is downstream of South Golden Road on

I

concrete-lined

rectangular

empties into a

it

Golden unti

the City of

commercial properties in

Military Reservation

George West

the channel continues

6th Avenue

of

Downstream

Avenue

6th

of

channel upstream

I

in unincorporated

residential and undeveloped properties

through various

northeasterly

I,

Below

and is joined by

South Golden Road

the channel crosses open space In Camp George West

then crossing under

Jefferson County crossing several streets and

South Golden Road

2

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