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![Page 1: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/1.jpg)
Trail BridgesTrail Bridges – – A Common Sense Approach A Common Sense Approach
to Selecting Bridge Sitesto Selecting Bridge Sites
Presenter:Presenter:
James “Scott” Groenier, P.E.James “Scott” Groenier, P.E.
Project Leader, MTDC, WITProject Leader, MTDC, WIT
Prepared for: NOHVCC ConferencePrepared for: NOHVCC Conference
Ontario, CA Ontario, CA
March 17, 2005March 17, 2005
![Page 2: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/2.jpg)
22
Technology & Development
IntroductionIntroduction Site ReconnaissanceSite Reconnaissance Geomorphology ConcernsGeomorphology Concerns Hydrology and HydraulicsHydrology and Hydraulics AlignmentAlignment Environmental Concerns Environmental Concerns Design LoadsDesign Loads Trail Bridge WebsiteTrail Bridge Website SummarySummary
![Page 3: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/3.jpg)
33
Technology & Development
Site ReconnaissanceSite Reconnaissance
Site Investigation - simpleSite Investigation - simple
![Page 4: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/4.jpg)
44
Technology & Development
Site ReconnaissanceSite Reconnaissance Site Investigation - ComplexSite Investigation - Complex
Streambed strata
Floodplain widths
Soil types
Logs in stream
Ice Damage
Drift locations
Etc
![Page 5: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/5.jpg)
55
Technology & Development
Site ReconnaissanceSite Reconnaissance Site SurveySite Survey
Center of Stream
Edge of water
Bottom of Bank
Top of Bank
Floodplains
Trail
Utilities
Roads
Drift / Ice damage
Etc
Survey upstream and downstream for 300 ft
Survey approaches on both sides 150 ft
Survey top of banks for 30 ft
![Page 6: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/6.jpg)
66
Technology & Development
Site ReconnaissanceSite Reconnaissance Geotechnical InvestigationGeotechnical Investigation
Bedrock Loam
![Page 7: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/7.jpg)
77
Technology & Development
Geomorphology ConcernsGeomorphology Concerns
From Rosgen’s
“Field Guide for
Stream Classification”
![Page 8: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/8.jpg)
88
Technology & Development
Geomorphology ConcernsGeomorphology Concerns
Stream StabilityStream Stability
Bedrock - Type A Channel
Stable Banks – Type B Channel
Deposition Area – Type C Channel
![Page 9: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/9.jpg)
99
Technology & Development
Geomorphology ConcernsGeomorphology Concerns
Bank StabilityBank Stability
![Page 10: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/10.jpg)
1010
Technology & Development
Hydrology and HydraulicsHydrology and Hydraulics Waterway AdequacyWaterway Adequacy
HydrologyHydrology +Regression Equations from USGS Reports on Estimating Frequency and Magnitude of Floods
=
Flow (CFS)
![Page 11: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/11.jpg)
1111
Technology & Development
Hydrology and HydraulicsHydrology and Hydraulics Waterway AdequacyWaterway Adequacy
HydraulicsHydraulics
1) Take CFS from Hydrology
2) Take Site Investigation info
3) Take Site Survey
And
Use a computer model such as
HEC-RAS (River Analysis System)
Or
WinXSPRO
And you get this…..
HEC-RAS Example
![Page 12: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/12.jpg)
1212
Technology & Development
Hydrology and HydraulicsHydrology and Hydraulics
Flooding –Spring, Fall or rain on snowFlooding –Spring, Fall or rain on snow
Good or Bad Location?
![Page 13: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/13.jpg)
1313
Technology & Development
Hydrology and HydraulicsHydrology and Hydraulics
ScourScour
![Page 14: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/14.jpg)
1414
Technology & Development
Hydrology and HydraulicsHydrology and Hydraulics Navigational Navigational
ClearanceClearance
5 ft Minimum Required
![Page 15: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/15.jpg)
1515
Technology & Development
AlignmentAlignment HorizontalHorizontal
Straight
90 degree Bend
![Page 16: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/16.jpg)
1616
Technology & Development
AlignmentAlignment VerticalVertical
Slight Grade
Bottom of Sag Curve
![Page 17: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/17.jpg)
1717
Technology & Development
Environmental ConcernsEnvironmental Concerns FisheriesFisheries
Spawning Areas, Fish passageSpawning Areas, Fish passage TES - ClosuresTES - Closures
SalmonSalmon Bull TroutBull Trout Cutthroat TroutCutthroat Trout etcetc
WildlifeWildlife Nesting Trees, Rearing areas, etcNesting Trees, Rearing areas, etc TES - ClosuresTES - Closures
Indiana BatIndiana Bat Bald EaglesBald Eagles Northern GoshawkNorthern Goshawk etcetc
![Page 18: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/18.jpg)
1818
Technology & Development
Environmental ConcernsEnvironmental Concerns Ice FlowIce Flow Floating DebrisFloating Debris Falling TreesFalling Trees Falling RocksFalling Rocks Excessive Snow LoadsExcessive Snow Loads Avalanche ChutesAvalanche Chutes Springs/SeepsSprings/Seeps WetlandsWetlands OthersOthers
![Page 19: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/19.jpg)
1919
Technology & Development
Design LoadsDesign Loads
Dead LoadsDead Loads SuperstructureSuperstructure DeckingDecking RailingRailing Wearing SurfaceWearing Surface Miscellaneous Miscellaneous
Utility LinesUtility Lines CoversCovers
![Page 20: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/20.jpg)
2020
Technology & Development
Design LoadsDesign Loads
Live LoadLive Load Pedestrian – Pedestrian – 85 psf85 psf
Equestrian Equestrian OHV’sOHV’s SnowmobilesSnowmobiles Mountain BikesMountain Bikes VehiclesVehicles
5,000 width <6 ft5,000 width <6 ft 10,000 6 ft<width<10 ft10,000 6 ft<width<10 ft
![Page 21: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/21.jpg)
2121
Technology & Development
Design LoadsDesign Loads Snow Loads – Snow Loads – 0 psf to over 350 psf0 psf to over 350 psf
SNOTEL sites – SNOTEL sites – 550 to 600 in the West550 to 600 in the West
Local Building OfficialsLocal Building Officials http://fsweb.mtdc.wo.fs.fed.us/snow_load/http://fsweb.mtdc.wo.fs.fed.us/snow_load/
Wind LoadsWind Loads OverloadsOverloads
GroomersGroomers 7600# - 18,000#7600# - 18,000#
![Page 22: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/22.jpg)
2222
Technology & Development
Bridge TypesBridge Types
Trail Bridge CatalogTrail Bridge Catalog Forest Service Intranet - Forest Service Intranet -
http://fsweb.mtdc.wo.fs.fed.us/bridges/http://fsweb.mtdc.wo.fs.fed.us/bridges/ Forest Service Internet - Forest Service Internet -
http://www.fs.fed.us/na/wit/WITPages/bridgecatalog/http://www.fs.fed.us/na/wit/WITPages/bridgecatalog/
![Page 23: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/23.jpg)
2323
Technology & Development
Bridge Bridge Fabrication/SupplyFabrication/Supply Structure produced by a certified Manufacturer Structure produced by a certified Manufacturer
for the type of material being used.for the type of material being used.- See “Contact Information For Wood and Steel Pedestrian and - See “Contact Information For Wood and Steel Pedestrian and Trail Bridges” at National Wood In Transportation WebsiteTrail Bridges” at National Wood In Transportation Website
![Page 24: Trail Bridges – A Common Sense Approach to Selecting Bridge Sites Presenter: James Scott Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC.](https://reader034.fdocuments.in/reader034/viewer/2022052618/55168967550346a25b8b4c16/html5/thumbnails/24.jpg)
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Technology & Development
SummarySummary Site ReconnaissanceSite Reconnaissance Geomorphology ConcernsGeomorphology Concerns Hydrology and HydraulicsHydrology and Hydraulics AlignmentAlignment Environmental Concerns Environmental Concerns Design LoadsDesign Loads Trail Bridge WebsiteTrail Bridge Website Questions?Questions?