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

4.5

TABI,E OF CONTENTS (Continued)

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4.4.4

Tributary Area Not Within A Maior DrainagewayJ3as!!! ...

4-3

Channel Routing. . . .

...... 4 - 3

SECTION 5.0 OPEN CHANNELS. .

5 - 1

5.1
5.2

5.3
5.4

5.5

5.6
5.7
5.8
5.9

Introduction ........
Channel Types .....

5 - 1
5 - 1

5.2.1 Natural Chann,.~ ............................ . . . . . . . . 5 - 1
5.22 Grass Lined Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 2
5.2.3 Concrete Lined_Channels. . .. . ... ... .. . . . . . . . . . . ... . . . . . . . . .. 5 - 2
5.2.4 Rock Lined Chlmnels ................. . . . . . . . . . . . . . . . . . . . . .. 5 - 3
5.2.5 Other Lining T,~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 - 3
5.2.6 Wetlands Vegetation Bottom Channels. . . . . . . . . . . . . . . . . . . . . . .. 5 - 3

Flow Computation .....................
Design Standards for Major Drainageways . . . . . . . .

5-4
5-4

5.4.1 Natural Channels (Maior Drainagewavs) . . . . . . . . . . . . .. 5 - 4
5.4.2 Grass Lined Channels (Maior Drainagewav) . . . . .. ....... . . . . . . .. 5 - 5
5.4.3 Concrete Lined Channels (Maior Drainagewav) .... . . . . . . .. 5 - 8
5.4.4 Riorap Channel Linings (Maior Drainagewav) ........................ 5 - 11
5.4.5 Other Lining Types (Maior Drainagewav) . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 - 11

Design Standards for Small Drainageways ..............

5 - 12

5.5.1
5.5.2
5.5.3
5.5.4
5.5.5

Natural Channels (Small Drainagewav) . . . . . . . . . . .
Grass Lined Cqannels (Small Drainageway) . . . . . . .
Concrete Lined Channels (Small Drainagewav) . . . . .
Riorao Channel Linings (Small Drainagewav) .....
Other Lining Tyoes (Small Drainagewav) . . . . . . . . .

5 - 12
5 - 12
5 - 14
5 - 17
5 - 17

Roadside Ditches ......................................................

Channel Rundowns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance and Access Easements .................

Checklist.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .

5 - 18
5 -19
5 - 19
5 - 20

SECTION 6.0 STORM SEWERS. . . .

6 - 1

6.1
6.2
6.3

Introduction ..................
Construction Materials . . . .
Hydraulic Design .................

6 - 1
6 - 1
6-3

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