FLOOD00281

• County: Larimer
• Community: Greeley
• Title: Design Criteria and Construction Specifications volume 2 of 5 Storm Drainage Criteria
• Date: 10/1/1997
• Prepared For: Greeley
• Prepared By: Department of Public Works
• Floodplain - Doc Type: Educational/Technical/Reference Information

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DITCH TYPE I
SEE NOTE 3~

2' CONCRETE
SHOULDER

MAXIMUM DEP TH FOR
5 YEAR FLOOD (TYP)

PROPERTY L1NEl

I

15' MIN.

I'

PAVEMENT

ALLOWABLE LONGITUDINAL
SLOPE FROM
0.4% TO 2.5%

<!J
,
N

.
'~I
3

"1: "'~ :~-~: '~""':~ ~:~.'

GRASSED SLOPES (TYP)

DITCH TYPE II

15' MIN.
MAXIMUM DEPTH FOR
5 YEAR FLOOD (TYP)

PROPERTY L1NE~
I I'

2' CONCRETE
SHOULDER

.~.~-~' ,~',_",-":e:

PAVEMENT

ALLOWABLE LONGITUDINAL
SLOPE FROM
0.4% TO 2.5%

4'

6" LAYER OF RIPRAP WITH
050= 3", AND FIL TER
MA TERrAL

DITCH TYPE III

15' MIN.

PROPERTY L1NEl

I
I'

2' CONCRETE
SHOULDER

.~.

6"

,; ..~ ......' ~ .., " ~_:~.'

PAVEMENT

ALLOWABLE LONGITUDINAL
SLOPE LESS THAN 0.4%

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}.~

CHANNEL

~ ~~:. \ :.'.~" .'",

NOTE:
I FOR STREET SLOPES GREATER THAN MAXIMUM ALLOWABLE, CHECK
DROPS (2' MAXIMUM HEIGHT) WILL BE REQUIRED.
2. STREET CROSS SECTION MAY INCLUDE CONCRETE CURB AND GUTTER.
3 PROVIDE 2' WIDE 8" THICK CONCRETE CURB, SEE STREET
ST ANARDS DETAIL NO. S-1.

STORM DRAINAGE CRITERIA
ROADSIDE DITCH SECTIONS
FIGURE 5-6

Public Works
Department DATE: AUGUST, 1996

SCALE: N. T.5.