FLOOD04125

• County: Statewide
• Basin: Statewide
• Title: Interim Procedures for Evaluating Scour at Bridges
• Date: 9/1/1988
• Prepared By: Federal Highway Administration
• Floodplain - Doc Type: Educational/Technical/Reference Information

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l'ln/Dat
Tlll'ltati v. PracHur_
Bridg. Scaur Study

Append Ix B

I. SCr-aani n; Prac_.

Th. tap pr-iar-ity far' scaur analy.i. ...a. d.t.....inlld to b. the
Tr-unk High_y Brid;_ WUPPOr-tH an spr-ead foo1:inv.. "coeput....
analy.i. _. _d. by Bridg. Inventar'Y of an of the br-idV_ in
the .tate. Appr-oxi..t.ly 1500 brid;e. ........ found to b.
an spr-.ad ar' unknown footinv. ov.... .tr-..... Of th..., T.S _e
on the Tr-unk High_y .y.t_, and th.....fOl"e analYZH fir-.t.

Elchibit I-A. Suular'Y of "inn. Brid;e. with Foundatian Probl_..

II. Data Collectian Pha_

As laUch eMi.tin; data a. pos.ible _. COllectH and "'_.r-iZH
on ..ch br-idge fr-o. various sourc_ includinV the bridge plan,
hydraulic dat., and the br-idV. inspection r-epar't.. In.-
c...., additional d.ta wa. r-equ_tH fr-~ the di.tr-ict ar
obt.inH fr-OIll a field r_i_.

Elchibit II-A. Bridge Scaur ""aly.i. - Source. of Infar'_tian.
II-B. Brid;e SCaur SCr-aanin; Dat..

111. Pr.liminary Analysi.

U.inv the collectlld data, the pr-HictH tICOW'" -. c.lculatH
fr-~ the equ.tion. and pr-ocHur_ given in the fir-.t draft of
the Technical Advisory on er-idge Scour. A spr-e.dsheet progr-..
_. develapH to III'It.... the data and .olv. the equation.. "
...arandu. _. ..,.ittlll'l summ.r-izing the .nalysi. and giving
recollllllend.tion. a. to whether the br-idge ..... scaur critic.l
ba.1Id on the preliminary analy.i..

Elchibit III-A. Blank input farm far SCour Depth Predictian pr-ovra..
III-B. Catnpleted input and output far_ fr-o. Scaur Depth
PrHicUon pr-OVr_.
III-C. eu-ary PIeIlIorandue and .ketch on . BridVe.

IY. Field Revi_

Far each br-idge prHictH to be scour cr-Uical, and far any
bridge for which furth.... infar_tian i. nece.sary, . field
r_i_ i. r-ecDlUllll'ldH. Dur-inV the field r_i_, confirm data
used in offic. analysi., obtain any .ddition.l data that .ight
be nec..sary, check far vi.ible .i.,. th.t scour- i. nQtol
accurrinv ar ha. acCurr-H, and dacueent the br-idge with
photovraph..

ElchibU IY-A. Field Revi_ Ch.ckU.t.

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