FLOOD04002

• County: Jefferson
• Community: Golden, Jefferson County
• Stream Name: Clear Creek
• Basin: South Platte
• Title: Major Drainageway Plan - Clear Creek: Youngfield Through Golden
• Date: 2/1/1982
• Prepared For: UDFCD
• Prepared By: Wright-Mclaughlin Engineers
• Floodplain - Doc Type: Floodplain Report/Masterplan

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JORGENSEN AND HENDRICKSON ENGINEERS, INC.

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In 1969 the bridge was widened to a 55' roadway with 5' wide side-
walks, one on each side. Precast prestressed concrete s~n91e stemmed
girders 48" depth by 7' wide were added, two on each side of the bridge.
The west, or upstream side ends, were flared 450 in 8' to provide a
funnel shaped entrance channel. The abutments were reinforced concrete
and were widened accordingly.
The inspection confirmed the information related from the drawings but there
was noted sor~ deterioration on the underside of the bridge deck that
spans over the steel girders. This was not deep and not enough to expose
any reinforcing steel. Some rysting was noted on the girders but not
of any magnitude to be of any concern. The expansion joints on the two
sides appeared to be working. Botl, bridges were similar in the quality
of structural integrity.

CONSULTING ENOINEERS

STRUCTURAL REV 1 E\oJ OF BR lOG ES AT FORD S TRE ET Arm WASH II~GTO!1 AV ENUE

At the request of Wright-McLaughlin Engineers, the Ford Street and Washington
Avenue bridges over Clear Creek were reviewed by the firm of Jorgensen a~
Hendrickson Engineers, Inc. relative to the flood study of Clear Creek at
Golden, Colorado.

Ford Street Bridqe
The original portion of the bridge was constructed approximately
1930, Thiswasatwo-lanebridge28'wideplussidewa1kson
either side, The bridge spanned &0' across the river
with 36" deep steel beams at 6'-6" on center covered with a
reinforced concrete deck. The abutments were reinforced
concrete, 12'-4" in height from botton of t.eams to top of
footing. The watEr line was 6'-10" below the botto," of the
steel beam. The riverbed..'as approximately 12" to Hl" below
thewaterSJrface.

State Bridqe Rating
Both the washington Avenue and the Ford Street bridges were rated by the
State of Colorado in 1981. This bridge rating gives the condition of the
bridge and also the operating legal load limit.
Washingt~n Avenue Bridge
Based on actual inspection the operating rating calculated for this
bridge was in excess of the legal truck load li~it for the State of
Colorado. The condition rating is based on a possible high of
8 and the ratings for the varioys conponents for this bridge
areasfol1ows:

A field observation was made Jyne 26, 1981 on both the Ford Street and
Washington Avenue bridges. D~awings were also received from the City of
Golden for t~e Ford Street Brldge over Clear Creek 1971 Widening Project,
We also recelved s~ructural drawings for the Washington Avenue bridge over
Clear Creek 1959 Wldening PrOJect, A description of the t"~ bridgeS is as
follows:

Approach 7
Oed 7
Superstructure 6
Sybstructure 7
Stre<lnbed 7

In 1971 thebridgewaswidenedtoa SO' rO<ldwayplusa4'-6"
sidewalk on each side. The beans were 60' span precast prestres,ed
concrete single stemmed girders. Three units were placed on each side
of the bridge, they were 44" deep by S'-2" wide. Theabytrnents
were reinforced concrete and widened accordingly to match the
original construction,

Ford Street Bridge

Washington Avenue Bridge
The original construction on this bridge was in the 1930's and
consisted of a 36' wide roadway with two 5' sidewalks on either
side spanning a distance of 61'-9" over the river. Steel girders
35"deepat6'oncenterspannedthewaterwayandareinforced
concrete deck was the roadway. Abytments arc reinforced con-
crete approximately 58' wide at the waterway. The distance
from the streambed to the other side of the girders is 10'-6"
<lnd a distance of 15'-2" fror.l the top of the footing to the
u~derside of the girders.

Based on the visual inspection the calculated operating rating is
in excess of the legal truck load limlt for the State of Colorado. The
condition rating for this bridge is as follows:
Approach 8
Oed 6
Syperstructure 6
Substructure 7
Streambed 7
Stability Under 50 and 100 Year FlOod

Table V 1-1 i 11 the >lr i gl1 t-~Ic La ugh 1 i 11 repo rt i ndi ca tes the s Umr1a r y of fo rc e, on
the .ash~ngton Avenue <lnd ford Street bridges. The first section gives forces
under EXlsting Conditions which the upstream portion of the prestressed girders

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