flood plain information south creek, north creek, catfish - Sarasota ...

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Table 4 shows the approximate number ot acres andstructures flooded within the study I imits by the IntermediateRegional and Standard Project Floods. These figures do notreflect those flooded areas and structures which are outsidethe study limits.TABLE 4EXTENT OFFLOODINGFloodNumber ofStructures FloodedFlooded Area(Acres)Flu i It-up Area(Acres)Intermediate Regional989042Standard Project121,33060Obstructions - During floods, debris collecting at bridgesand culverts could decrease their carrying capacity and cause greaterwater depths (backwater effect) upstream of these structures. Sincethe occurrence and amount of debris are indeterminate factors, onlythe physical characteristics of the structures were considered inpreparing profi les of the Intermediate Regional and Standard ProjectFloods. Simi larly, the maps of flooded areas show the backwatereffect on obstructive bridges and culverts, but do not reflect increasedwater surface elevation that could be causee by debris coi-Iect ing aga i nst the structures, or by depos it i on of s i It in thestream channel under structures. Of the 28 bridges and culvertscrossing the streams in the study area, most of them are obstructiveto the Intermediate Regional Flood and even more obstructive to theStandard Project Flood. Table 5 I ists water surface elevations atselected bridges and culverts that may be restrictive during floodflows.23
TABLE 5ELEVATION DATA OF STRUCTURESCulverts and Bridges Across South Creek, North Creek,Catfish Creek, Clower Creek, EI ligraw Bayou, and Matheny CreekWater Surface Elevation (a)Mi leage Under- (a) Low Bridge (a) Intermed i ate StandardIdentification Above Clearance Approach Regional ProjectMouth Elevation Elevation Flood FloodS'cth Creek BridgeU. S. Highway 41 0.6 9.0 11.0 5. I 6. INorth Creek Bri~L. S. Highway 41 0.9 7.2 10.0 2.7 3. ICatfish Creek BridgeU. S. Highway 41 0.7 9.4 10.5 7. I 8.7Clower Creek Cu IvertU. S. Hi ghway 41 0.5 11.8 15.8 8.8 9.3EI I i graw Bayou CulvertlI. S. Highway 41 0.3 6.6 10.5 1.6 1.9MCltheny Creek Cu Ivertu. S. Highway 41 0.4 7.3 14.5 2.5 3. I(a) Feet, mean sea level datum24
Page 1: 1FLOOD PLAIN INFORMATIONSOUTH CREEK
Page 5 and 6: CONTENTSPREFACE--------------------
Page 7 and 8: ICONTENTS(Continued)FiGURESFl gureP
Page 9 and 10: PREFACEThe polLtion 06 SaJta..6o:m
Page 11 and 12: North Creek, Catfish Creek, Clower
Page 13 and 14: FLOODSITUATIONSOURCES OF DATA AND R
Page 15 and 16: away and carried downstream to coll
Page 17 and 18: Figure 1U. S. Highway 41 Bridge Ove
Page 19 and 20: Figure 5 U. S. Highway 41 Box Culve
Page 21 and 22: FLOOD DESCRIPTIONSThe fol lowing ar
Page 23 and 24: "The worst flooding in 1962 occurre
Page 25 and 26: .•:::=;...Figure 7 Flood of 1972_
Page 27 and 28: STA.NDARDPROJ en FLOODThe Standard
Page 29 and 30: Table 3 shows a flood elevation com
Page 31: area tJOUneJdl il" 'I~I(' ,jr('dS t
Page 35 and 36: TABLE 6RATES OF RISE AND DURATION(S
Page 37 and 38: Figure 9 U. S. Highway 41 Bridge Uv
Page 39 and 40: GLOSSARYBackwater. The resulting hi
Page 41 and 42: GLOSSARYBackwater. The resulting hi
Page 43 and 44: Left Bank. The bank on the left sid
Page 45 and 46: "•c • ••~- .I - -.'.~. .""I
Page 47 and 48: ..'e0:I.;J tli'}1--------------~---
Page 49 and 50: 25...JVI::::Ii.2015~ 10lL.IZ50-l-e:
Page 51 and 52: •t-=ILIZoI~>UJ...JUJCROSS SECTI

flood plain information south creek, north creek, catfish - Sarasota ...

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