FLOOD06380

• County: Statewide
• Community: Adams/Arapahoe/Denver/Broomfield/Douglas/Jeffco
• Basin: Statewide
• Title: Urban Storm Drainage, Criteria Manual Volume 2
• Date: 6/1/2001
• Prepared By: Wright Water Engineers, Inc.
• Floodplain - Doc Type: Educational/Technical/Reference Information

TABLE OF CONTENTS

DRAINAGE CRITERIA MANUAL (V. 2)

3.6
3.7

3.5.2 Invert Elevations ............................................................................................ CU-16
3.5.3 Culvert Diameter...... .......... .., ...... ...... .......... ...,.......... ...,..... ................ ..... ....... CU-17
3.5.4 Limited Headwater ....,.................................................................................... CU-17

Culvert Outlet ......... ............................. ..................... ............. ................ ........... ........... CU-17
Minimum Slope ..... ....... ........... ............. ...... .... ........... ..... .......... ......... .......... ....... ......... CU-17

4.0 CULVERT INLETS ..... ..... ..... ......... ............... ......... ............ ..,............... ...... ... ...... ..................... CU-22
4.1 Projecting Inlets .......................................................................................................... CU-23
4,1.1 Corrugated Metai Pipe................................................................................... CU-24
4.1.2 Concrete Pipe ................................................................................................ CU-24
4.2 Inlets with Headwalls .................................................................................................. CU-24
4.2.1 Corrugated Metal Pipe................................................................................... CU-25
4.2.2 Concrete Pipe... .......... ............. ...... ........................ ...... ............... ............... .... CU-25
4.2.3 Wingwalls......... ..... ....... ............. ...... ...,............... ........... .... ......... .................... CU-25
4.2.4 Aprons .................. ....... ................................. ....................... ...... ..... ............... CU-25
4.3 Special Inlets .................................... ...... ...,.. ..... .............. ............................. ........... ... CU-26
4.3.1 Corrugated Metal Pipe................................................................................... CU-27
4.3.2 Concrete Pipe ................................................................................................ CU-27
4.3.3 Mitered Inlets ..... ......................... ........... ........ ...... ........ .............. .................... CU-27
4.3.4 Long Conduit Inlets........................................................................................ CU-27
4.4 Improved Inlets..... ..... ...... ....................... ........... .......... ........ ....... ... ,.................... ........ CU-28

5.0 INLET PROTECTION .............................................................................................................. CU-29
5.1 Debris Control....... ..... ................ ............................. ........................................ ............ CU-29

5.2 Buoyancy........... ..... .... ...................................... ...... ......... .......... ..... ................ ............ CU-30

OUTLET PROTECTION. .... .................... ......... .................. ......................... ....... ...................... CU-31

6.1 Local Scour.., ........... .... ..... ..................................................................... ... ....... ........... CU-31
6.2 General Stream Degradation ...................................................................................... CU-31

7.0 GENERAL CONSIDERATIONS ............................................................................................,. CU-33
7.1 Culvert Location ................................................,....................................................,..,. CU-33
7.2 Sedimentation ................................. '...'. ..... ........... ..., ..." ..... ....,......... .......... ...... .... ...,.. CU-33
7.3 Fish Passage....... ........................ ,..,..... ...... ....' .......... .......... ..... ................... ...,... ,....... CU-34
7.4 Open Channel Inlets ..............................................,..,................................................. CU-34

7.5 Transitions ...,. ............... ..... ...... ............. ...... .................................. ...,.. ..... ..... ...,.......... CU-34
7.6 Large Stormwater Inlets........... ........ .......... ............................... ....... ....................... .... CU-35
7.6.1 Gratings .............................. ............ ..,.................... ........................................ CU-35
7.6.2 Openings ... ....... ..... ..... ........ ............ .............................................. ................. CU-35
7.6.3 Headwater,. ,..... .................. ...,........ ..... .......... ............. ,. ... ...,.. ..." ......... .......... CU-35
7.7 Culvert Replacements ................................................................................................ CU-35
7.8 Fencing for Public Safety ........,..'................................................................................ CU-35

6.0

8.0 TRASH/SAFETY RACKS ......... ........................... ...... .... .................. ..... .......... ......................... CU-36
8.1 Collapsible Gratings....... .............. ........... ........... ..................................... .................... CU-37
8.2 Upstream Trash Collectors ......................................................................................... CU-37

9.0 DESIGN EXAMPLE....................................... ...... ...,.. .............. ...... .... ......... ......... ...... .............. CU-38
9.1 Culvert Under an Embankment .................................................................................. CU-38

10.0 CHECKLIST.... .... ........................................... ...... .............. ........... .... ...... ... ................ ............. CU-44

11.0 CAPACITY CHARTS AND NOMOGRAPHS........................................................................... CU-45

12.0 REFERENCES ... ........ .................. ..... ........................................ ............ .......................... ........ CU-59

TOC-iv
Urban Drainage and Flood Control District

6/2001

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