61540-60889_Mission_Creek_(West)_2018.pdf
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Mission Creek (West) Bridge Inspection Report
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Bridge Number:
Region 6
NATIONAL BISON RANGE
MISSION CREEK (WEST)
Type of Inspection:
BRIDGE INSPECTION AND APPRAISAL REPORT
Date of Inspection:
61540-60889
Routine
Date of Report:
08/20/2018
09/11/2018
Prepared by: Short Elliott Hendrickson, Inc.
U.S. Fish & Wildlife ServiceSubmitted by:
U.S. Fish & Wildlife Service
Geocal, Inc.
Division of Engineering
Dam, Bridge & Seismic Safety Branch
Arlington, VA
Project leaders (and others) should be aware that the posting recommendations are for the absolute maximum load
INTERIOR
STRINGER
EXTERIOR
STRINGER
DECK
TYPE 3-3 (40T)
TYPE 3S2 (36T)
TYPE 3 (25T)
TYPE HS 20-44
AASHTO TRUCK
TYPE
INV
Sign Recommendations
No load posting required. Object markers are recommended at all corners of the bridge.
Sign Recommendations
Load Ratings (Tons)
Bridge Element
INV = Inventory Rating
Load Rating Remarks
DECK: 4" gravel fill above the 4 1/4" x 12" x 9" gauge corrugated steel decking. Stressed Used: Structural Steel Yield Stress = 45,000 psi. STRINGER: W33 x 118; spacing = 4'-0", span = 78'-4". Stressed Used: Structural Steel Yield Stress = 50,000 psi. Exterior stringer governs.
Vincent Dorzweiler, 8/15/12RATING PREPARED BY:
INV OPER INV OPER INV INVOPER OPER OPER
53.7 73.4 24.5 39.8 29.8 46.4
OPER = Operating Rating
Load posting sign recommendations are based on operating ratings. See note regarding posting recommendations below.
RATING VERIFIED BY: John Butt, 9/5/18
All recommended signs are in place.
Sign Status
The stringer rating is based on field measurements of the section. Drawings provided for this bridge do not indicate the as-built stringer section used. The load rating from 2012 is still considered valid. No significant changes in the condition of the bridge which would affect the rating were observed during the 2018 inspection. The load capacity and weight limit posting recommendations remain as shown above.
Sign Recommendation Remarks
Important Note Regarding Posting Recommendations levels to which a structure may safely be subjected for limited passages of the loads. Should the need arise to subject the bridge to sustained loading at or near this level, the Project Leader should contact the Regional Engineer for guidance regarding an appropriate safe load capacity.
Sign Recommendations and Load Ratings
61540-60889 09/11/20185
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