r
FLOOD PROFILES IN THE UMPQUA RIVER BASIN,'OREGON PART 2 UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY
FLOOD PROFILES IN THE UMPQUA RIVER BASIN, OREGON
By Eugene A. Oster
part 2.
Umpqua River, Scottsburg to Hubbard Creek
North Umpqua River, Winchester to Idleyld
Prepared in cooperation with DOUGLAS COUNTY
OPEN-FILE REPORT... 1973 Portland, Oregon CONTENTS
Page
Introduction i
Description of the study reaches 2
Floods in the Umpqua River basin 4
Study methods 6
Photogrammetric mapping 6
Collection of field data 7
Roughness coefficients 7
Step-backwater analysis 8
Results of the study 8
Umpqua River 9
North Umpqua River 11
Use of the results 13
Summary 13
Revisions to part 1 profiles 13
References 14 ILLUSTRATIONS
Page
Figure 1. Map showing location of study area 3
Stage hydrograph of Umpqua River near Elkton, flood
of December 1964 5
Flood-frequency curves for selected gaging stations 6
Stage-discharge relation, Umpqua River near Elkton 10
Stage-discharge relation, North Umpqua River at rail-
road bridge at Winchester 11
Stage-discharge relation, North Umpqua River near
Glide 12
7 to 37. Graphs showing water-surface profiles 35-65
38 to 85. Cross sections 66-113
11 TABLES
Page
Table 1. Annual peaks for Umpqua River near Elkton, Oreg.
(gaging station 3210) 16
Annual peaks for North Umpqua Riverat Winchester,
Oreg. (gaging station 3195) 17
Annual peaks for North Umpqua Rivernear Glide, Oreg.
(gaging station 3185) 18
Discharges used to develop the flood profiles 19
Profile elevations for Umpqua River 20
Profile elevations for North Umpqua River, Winchester
to Idleyld Park 26
Revised profile elevations for South Umpqua River 29
Revised profile elevations for North Umpqua River,
mouth to Winchester Dam 34
ill FLOOD PROFILES IN THE UMPQUA RIVER BASIN, OREGON
Part 2
By Eugene A. Oster
INTRODUCTION
The elevations and characteristicsof floods are major factors that influence land-use planning of the floodplains of any stream. As the lowlands become more intensivelyused, it becomes increasingly important to have a firm basis for assessing the risk offlood damage. Land-use zoning is not only a legal requirementpassed by the Oregon State Legis- lature in 1969; it isnecessary to ensure a use compatible with the risk of flood damage. The approximate areas flooded in 1955and 1964 in the Umpqua River basin upstream from ColesValley are shown in an interim report (Corps of Engineers, 1966). However, there are no published flood-elevation profiles. Such profiles are needed to delineateareas inundated by floods of a specificrecurrence interval and to establish land-use zone boundaries.
This study was made at therequest of Douglas County to develop profiles for the 10-, 25-, 100-, and 500-yearfloods and the December 1964 flood. This report is the second ina series of three reports that will cover approximately 300 milesof Umpqua River basin streams. Al- though the three reportsare intended as a series, some introductory and explanatory material is repeated in each,so that each report can stand independently.
The reaches covered by thisreport are: Umpqua River from Scotts- burg upstream to Hubbard Creek, and NorthUmpqua River from Winchester Dam upstream to Idleyld Park.
The reaches covered by flood profilesin the Umpqua River basin, part 1 (Oster, 1972), are: Umpqua River above Hubbard Creek, North Umpqua River below Winchester Dam,and South Umpqua River and parts of selected tributaries below DaysCreek. A profile of the Umpqua River was computed for the 100-year flood adjusted for storage in the proposed Days Creek Lake on theSouth Umpqua River above Days Creek. Profile elevations were also computed for the 2-year and 50-year floods and are available for inspection inthe Oregon District office of the U.S. Geological Survey.
The step-backwater method was used to compute high-waterprofiles; photogrammetric maps and water-depth soundings were used todetermine the low-water and thaiweg profiles. The theory of the step-backwater method is described in detail in U.S. Geological SurveyWater-Supply Paper 1869-A (Bailey and Ray, 1966) and in many textbooks onhydraulics. The method uses hydraulic equations expressed as functionsof channel geometry, roughness, and slope.
This report presents the data needed to determine areassubject to inundation by the selected floods.Flooded areas can be determined by transferring the flood-profile elevations and the floodedwidth shown on the cross sections to the orthophotowork maps.
This study was made in cooperation with Douglas County,under the general supervision of Stanley F. Kapustka, Oregon districtchief of the Water Resources Division of the U.S. Geological Survey,and under the direct supervision of David D. Harris, chief of theHydrologic Investi- gations Section.
Many thanks are due to Berl Oar, of Douglas CountyWater Resources Survey, whose help in locating many high-water marks andbench marks greatly expedited the collection of field data. Douglas County also furnished stage readings obtained by the National WeatherService on the North Umpqua River at Winchester Dam. These readings were of great value in developing a stage-discharge relation to beginthe step- backwater computations, and are much appreciated.
Several people on the district staff of the U.S.Geological Survey contributed much patient work, without which the presentationof this report would have been impossible. Those deserving special recognition and praise are Antonius Laenen for his help with computerprocessing of the data; Alexander Gonsalves, who prepared the illustrations;and Nyra Johnson, who typed and edited the manuscript.
DESCRIPTION OF THE STUDY REACHES
The study reach on the Umpqua River begins at the highwaybridge in Scottsburg and extends 71 miles upstream to the mouth of HubbardCreek (fig. 1). The river is deeply entrenched, and the valley plains are narrow, ranging from a few hundred feet toabout half a mile wide. Except for the towns of Elkton and Scottsburg, the reachis sparsely populated. The arable flood-plain lands are used for hay meadowsand orchards. The upland hills are densely covered with conifer forest. Average channel slope ranges from 3 to 5 feet per mile. The study reach on the North Umpqua River begins at WinchesterDam and extends 27 miles upstream to Idleyld Park (fig.1). The river is deeply entrenched and flows through canyons that connectvalleys whose flood plains are generally less than a quarter of a milewide. Channel slope averages 11 feet per mile. The upland hills from Winchester to Glide are grass covered, with scattered stands of deciduous trees. Up- stream from Glide the grasslands and oak thickets mergeinto conifer forest. In the valleys near Glide there are small orchardsand culti- vated hay meadows.
FLOODS IN THE UMPQUA RIVER BASIN
The highest annual flows in the Umpqua River 1?asinusually occur from November through March as a result of heavy winter rainsaugmented by snowmelt. Annual peak flows for gaging stations on the Umpqua and North Umpqua Rivers are shown in tables 1 to 3. At the gaging station near Elkton, the flood of December 1964reached a stage 6.5 feet higher than the historic flood of 1861, which was equaled by theflood of December 1955. On the North Umpqua River the flood of 1964 was the highest since at least 1906, as shown by streainflow records atseveral sites from near the mouth to above Idleyld Park.
A stage hydrograph of the December 1964 flood at the gaging station near Elkton is shown in figure 2. Because the recording instruments were submerged a few hours before the peak, therecession of the flood is estimated by comparison to the gage record for South UmpquaRiver near Brockway.
Steel bridge girders found in the Umpqua River 4½ miles downstream from Elkton bear mute testimony to the destructive power of floods. The county road department reports (oral commun., July 17,1973) that these girders were lost during reconstruction of the Beckley Bridge in Elkton during 1927 and were carried a quarter of a mile downstream by the flood of 1927. Succeeding floods moved them farther downstream. Several bridges in the Umpqua River basin were severely damaged or destroyed during the flood of December 1964.
Flood-frequency curves for the gaging stations on the Uinpqua and North Umpqua Rivers are shown in figure 3.The curves were developed from annual peak-flow data using the log-Pearson type III method.The recurrence interval, in years, is the average period inwhich a given event might be equaled or exceeded. It should not be construed to imply any regularity of occurrence.The recurrence interval can be taken as a reciprocal of the probability of occurrence. A 10-year flood would have one chance in 10, or a 10 percent chance, of occurringin any year. A 100-year flood has one chance in 100, or a 1 percent chance, of occurring in any year. As drawn, the frequency curves are shown as a solid line to twice the period of record and are extended as adashed line to esti- mate higher floods up to the 500-year flood.
4 EXPLANATION 12 Stream-gaging station 122 120 S3630 0
122 120 r INDEX MAP OF OREGON Figure 1. --Location of study area. -Pc- Elevation of terrace 140
Bankfull stage (at gage)
130 u:l I I \
Recording instruments submerged by flood 1 a.m. December 23. Peak elevation determined from floodmark; recession estimated by comparison with South Umpqua River near Brockway and once-daily staff-gage readings 100 after December 27
20 22 24 26 28 DAY, DECEMBER 1964
Figure2.--Stage hydrograph of Umpqua River near Elkton (station3210),flood of December 1964. 500 z 0 - C!) -_- -- cz;i it0-
H
200 0 - - H (9 5 - eSt....__ 0 t
, - abo.Je
iq 20 50 100 200 500 RECURRENCE INTERVAL, IN YEARS
Figure 3. --Flood-frequency curves for selected gaging stations.
Discharges used to develop the flood profiles are shown in table4. On the Umpqua River, discharges upstream and downstream fromthe gaging station were determined in proportion to drainage area. On the North Umpqua River, streamflow records for Little River and RockCreek near Glide were used together with drainage area to determine flooddis- charges along the study reach.
Streamf low records'of the North Umpqua River were extended by cor- relation to records of Umpqua River near Elkton (3210) to provide a longer time base for the frequency analysis. The resulting frequency curve was significantly lower than the curvebased on the period of record alone. It was considered well to recompute the profiles in the reach of the North Umpqua River below Winchester Dam; therecomputed profiles will supersede those published in part 1 of this series.
STUDY METHODS
Photogrammetric Mapping
Channel-geometry data required for the step-backwater analysis were furnished by a commercial photogrammetry firm. They produced orthophoto work maps (scale 1 in. = 400 ft) from aerial photographs, with
6 horizontal and vertical map control establishedto third-order accuracy at primary picture ground-control points. An orthophoto map is an aerial photo mosaic completely corrected for scale anddistortion, and is as accurate as a plotted map. The orthophoto map shows all the detail visible on the photograph and includes muchdetail that would be omitted from a plotted map. Spot elevations, 5-foot ground contours, cross-section locations, and letteringwere added. All elevations are given in feet above mean sea level.
Cross sections were positioned perpendicular to the direction of flow in the channel and., where necessary,were angled to be perpendic- ular to the flow across the flood plain. Cross-section ground eleva- tions were determined at 100-foot intervals andat topographic breaks across the flood plain. Accuracy of cross-section elevations was to be within ±1 foot for 90 percent of the points where groundsurface was visible in the aerial photographs. Contour accuracy was to be within half a contour interval for 90 percent of thearea mapped where the ground surface was not obscured by vegetativecover.
The originals of the orthophoto work maps, not intended for publi- cation, are available for inspection in the office of the DouglasCounty Planning Department.
Collection of Field Data
Cross-section locations were selected in the field, and water-depth soundings were made prior to the photogrammetric mapping.To complete each channel cross section, the sounded water depthswere later added to the photogrammetric ground elevations. Cross sections were spaced about 1,000-1,200 feet apart, on the average, andat principal breaks in the channel gradient. A few additional cross sectionswere scaled from the photo map after the fieldwork had been completed.The bridges in the project reach were examined in the field and, basedon past experience, judged to have little or no constricting effecton floodflows.
The elevations of documented high-water markswere determined by leveling to nearby bench marks andwere used to verify the accuracy of the computed profiles.
Roughness Coefficients
Channel roughness coefficients required in the hydrauliccompu- tations were selected in the field for subreaches through eachcross section. Verbal description of bed material and color-slide photographs of the channel were used to aid in office review of thecoefficients selected. The aerial photographs were used to assist in selecting roughness coefficients for the flood plain.
7 Step -Backwater Analysis
A digital computer was used to make the large number of calcula- tions required in the step-backwater process. The profiles are devel- oped by beginning at the farthest downstream cross section with a known or computed stage-discharge relation and progressively computing profile elevations upstream from cross section to cross section.
On the Umpqua River, step-backwater computations were started at Scottsburg, using an estimated stage-discharge relation based on high- water marks of the December 1955, December 1964, and January 1971 floods, and a low-water elevation.
Between cross sections 12 and 13 the step-backwater computations were adjusted to match the stage-discharge relation curve for Umpqua River near Scottsburg (3229). This curve was defined by current meter to 53,000 cfs and extended on the basis of high-water-mark elevations and the shape of the step-backwater curve. The discharge of the December 1964 flood was computed on the basis of drainage area and unit runoff below Umpqua River near Elkton (3210).
At cross section 134, the stage-discharge relation for gaging station 3210 was used to continue the step-backwater computations up- stream. That stage-discharge relation was defined by current meter to 200,000 cfs and a slope-area determination of discharge at 208,000 cfs.
On the North Umpqua River at Glide, step-backwater computations were broken and restarted from an estimated stage-discharge relation above the mouth of the Little River. A very large rock outcrop in the channel and the flow of the Little River colliding head on with the North Umpqua River (see fig. 35) cause considerable pileup of water at this location. A relation was estimated based on a high-water mark and a low-water elevation. Step-backwater computations were continued up- stream, starting from the estimated relation.
RESULTS OF THE STUDY
Profile elevations for the selected flows are shown in tables 5 and 6. The distances shown were measured along the stream channel by the photogrammetry contractor.
The computed profiles, together with maps of the area, are shown in figures 7 to 37. The profiles can be related to the adjacent maps for location of cross sections. The stream boundaries shown on the maps and the low-water elevations shown on the profiles are for the days of aerial photography, Nay 27, 1972, on the North Umpqua River and May 30, 1972, on the Umpqua River. The late summer flows of August and Septem- ber can be expected to be 2-3 feet lower. Plots of the cross sections are shown in figures 38 to 85.
On the Umpqua River, a profile was computed for the 100-year flood adjusted for storage in the proposed Days Creek Lake on the South Umpqua River. The adjusted discharge was furnished by N. C. Hosea, Corps of Engineers (oral commun., November 11, 1971), for the gaging stationnear Elkton and was extrapolated upstream and downstreamon a drainage-area ratio. Elevations along this profile are listed in table 5.
Umpqua River
The step-backwater computationswere started at the Scottsburg bridge from an estimated stage-discharge relation basedon high-water marks. From cross section 3 to 11 it was necessary to adjust thestep- backwater computations to a profile defined by high-watermarks. Local residents report that extreme high tide affectsriver stages upstream to cross section 8.
The gaging station Umpqua River near Scottsburg (3229)was located on the right bank (facing downstream) between cross sections 12 and 13. The step-backwater profiles were adjustedto an estimated extension of the stage-discharge relation, whichwas defined by current meter to 53,000 cfs. Two high-water marks on the right bank andone approximate high-water mark on the left bank, pointedout by residents, show 3 to 3.5 feet of lateral slope from the right bankto the left bank. The profiles shown are the average of this lateral slope.From cross section 13 to 30, the computed profileagrees very well with known high- water marks.
From cross section 33 to 92 the computed profileswere adjusted to agree more closely to a profile based on high-water marks. At sec'tions 94 and 96, the computed profileagrees well with known high-water marks.
At cross section 96, in Elkton above the mouth of ElkCreek, three high-water marks on the right bank andone on the left bank show 2.4 feet of lateral slope from rightto left. The pileup is on the right bank, on the outside of a sharpcurve, where Elk Creek water would in- fluence the stage of the river.Another high-water mark, across Elk Creek, 1.4 feet lower in elevation, may reflectan eddy current. Still another high-water mark, on the left,at the outer edge of the flood plain, is 0.7 foot lower than the high-watermark on the left bank of the main channel. The 'computed elevation is 0.5 foot lower than the three right-bank high-water marks and 0.7 foot higherthan the average of left bank and right bank marks.
Between cross sections 96 and 134,one high-water mark was found, at section 117, about 2 feet higher than the computedelevation. This mark is at the edge of a flood plain 2,000 feetwide and may not truly represent water surface at the channel. Because marks defining high water are inadequate in this area, the profilesare accepted as com- puted.
At gaging station Umpqua Rivernear Elkton (3210), at cross section 134, the stage-discharge relation is defined bycurrent meter to 200,000 cfs and by a slope-area determination ofdischarge at 208,000 cfs.The step-backwater computations agreevery well with this relation (fig. 4) 150 Terrace -- Bankfull ç,44 0
C.: a 120
z H I çe C,'
100 20,000 100,000 500,000 DISCHARGE, IN CUBIC FEET PER SECOND
Figure 4.--Stage-discharge relation,Umpqua River near Elkton (station 3210). within the limits of its definition. Computations were continued up- stream using the relation definedby current meter.
Cross sections 136 to 177 lie in anisolated, uninhabited canyon. 186, the com- No high-water marks were found. From cross section 167 to puted profiles were adjusted to agreewith a water stain on a building well with a at cross section 178. The computed profile agrees very mark at cross section 188. From cross section 191 to206 the computed profiles were adjusted to a profile based onmarks at cross sections 192, 199, and 202.
From cross section 207 to 236,high-water-mark data were inadequate section 237 to to define a profile. The computed profiles from cross 268 agree with known high-water marks.
At cross sections 296 and 297 thereis a disagreement of several other feet between three high-watermarks--two of them spikes set by agencies and the other an approximatelocation pointed out by a resi- well with the approximate loca- dent. The computed profile agrees very tion and splits the difference ofthe other two. The profile was allowed to stand as computed.
From cross section 298 to 333, theend of the project reach, high- well water marks are sparse andinadequate. The computed profile agrees with a mark at cross section 314.
10 At cross section 333 the computed profiles are 2 to 2.5 feet higher than the estimated stage-discharge relation that was used to start the computations of part 1 of this series. Computations were continued up- stream to the lower end of Coles Valley; the profiles merged well at cross section 4 of part 1 and are presented as an addition to table 5 of this report, superseding the elevations published in part 1.
North Umpqua River
On the pier of the railroad bridge at Winchester there is an old staff gage that was used prior to 1930. The stage-discharge relation for this gage was defined by current meter to 40,000 cfs and extended logarithmically to bankfull. The channel bottom is rough bedrock, with no possibility of scour. The step-backwater computations of 1973 agree very well with this old relation below bankfull (fig. 5).
460
440
Bankfull
430
C, H
422
10,000 100,000 DISCHARGE, IN CUBIC FEET PER SECOND Figure 5. --Stage-discharge relation, North Umpqua River at railroad bridge at Winchester (station 3195).
11 The staff gages for gaging station North Umpqua River near Glide (3185), 1 mile below Glide, are still standing and in good condition. The stage-discharge relation for this gage was defined by current meter to 40,000 cfs and extended logarithmically to bankfull. The channel bottom is rough bedrock, with no possibility of scour. The step- backwater computations of 1973 agree very well with this old relation below bankfull (fig. 6).
688
Cl) E-an1fu 1 1---_ 668
F' C
658 H C,', 2 Ho
653 r 10,000 100,000 DISCHARGE, IN CUBIC FEET PER SECOND
Figure 6. --Stage-discharge relation, North Umpqua River near Glide (station 3185).
High-water-mark information is totally lacking or inadequate for long reaches of the North Umpqua River below cross section 95. From cross section 95 to 125 the step-backwater checks the available high- water marks quite well. Above cross section 118, above Lone Rock bridge, all floods are well confined within high banks
At cross section 118, on the left bank (facing downstream) above Lone Rock bridge, high-water marks of the December 1964 flood and January 1971 flood are 3.2 feet and 1.5 feet higher than the computed elevations. This is an area where floodwater would pile up on the left bank while making a sharp bend to the right to pass through the bridge opening. Three feet of pileup is consistent with experience elsewhere and is quite credible.
12 USE OF THE RESULTS
Elevations from the computed profiles (figs. 7-37) can be used in conjunction with the plotted cross sections (figs. 38-85) to determine the width ofhe area subject to flooding. This width can be trans- ferred to a suitable topographic map to determine the area inundated by each flood. If the contour interval of the map is sufficiently small, the flood-profile elevations can be plotted directly on the map to de- termine the inundated area.The plotted cross sections can also be used to determine the stage at which overbank flow occurs and where water might be ponded in low areas of the flood plain.
The 500-year flood profiles should be considered as estimates because of the comparatively short period of streamflow record on which the frequency analysis was based.
The step-backwater method of computation assumes a level water surface across the width of the river. Sharp channel curvature or a strong tributary inflow can superelevate the water surface by several feet from bank to bank. In using the results of this study, allowance should be made for this superelevation and for backwater in areas vul- nerable to catching debris. It should also be recognized that overbank flow can become separated from the main channel and continue at a higher elevation on the flood plain than in the main channel. Such conditions are extremely difficult to simulate.
The computed profiles are based on channel conditions at the time of the survey. Debris jams during a flood can cause varying amounts of backwater that are impossible to predict.Future channel changes or constriction of the flood plain could also change flood elevations in the affected reach.
SUNMRY
Flood elevations for the selected reaches of the Umpqua River basin are presented in graphic and tabular form.To give a concept of range in stage, a low-water profile is included. The profiles presented are in reasonably good agreement with documented high-water marks and stage- discharge relations defined by current meter.
REVISIONS TO PART I PROFILES
A revision of the stage-discharge relation for gaging station South Umpqua River near Brockway (3120) requires the published peak discharge of the December 1964 flood to be revised from 105,000 cfs to 125,000 cfs. This revision was based on information generated by, and compiled after, the publication of part 1 of this series. On the basis of this revision, it was necessary to recompute the profile of the December 1964 flood from near the mouth to near Tn-City.This revised profile (table 7) supersedes the one published in part 1 of this series. The flood-insurance study made in 1973 for Winston included a recom- putation of the step-backwater from the gaging station near Brockway.
13 Because of the revision of the stage-discharge relation at the gage and the recomputation of the bridge constriction and road overflow at cross sections 109 and 127, the several profiles were revised from cross section 107 to 136. The frequency analysis was reexamined in light of the new data and found to be changed less than 1 percent.The corres- ponding profiles are unchanged except as noted above.
On the North Umpqua River, step-backwater computations past the old gaging stations near Glide and at Winchester check the old stage- discharge relations very well. High-water marks found near each of these old gages shown the published figure of discharge for the December 1964 flood to be in error. The 1964 flood discharge at Winchester was revised from 119,000 cfs to 150,000 cfs. This revised discharge was used in a revision of the frequency analysis mentioned on page 6. This revision also required a revision of the stage-discharge relation above bankfull at gaging station North Umpqua River at Winchester (3195). Because of the revisions it was considered necessary to recompute the profiles in the reach of the North Umpqua River below Winchester Dam. Those recomputed profiles (table 8) supersede those published in part 1 of this series of reports.
REFERENCES
Bailey, J. F., and Ray, H. A., 1966, Definition of stage-discharge re- lation in natural channels by step-backwater analysis: U.S. Geol. Survey Water-Supply Paper 1869-A, 24 p.
Oster, E. A., 1972, Flood profiles in the Umpqua River basin, Oregon, part 1: U.S. Geol. Survey open-file rept., 119 p.
U.S. Army Corps of Engineers, 1966, Flood plain information, Douglas County, Oregon: U.S. Army Corps Engineers interim rept., 35 p.
14 Table 1. --Annual 'eaks for Urnua River near Elkton Ore:. (station 3210)
Elevation Water (in feet Discharge year Date above msl) (in cfs)
Site near downstream side of Smith Bridge
1862 Dec. 1861 137.1 218,000 1906 Jan. 17, 1906 111.4 61,400 1908 Dec. 26, 1907 122.0 106,000 1909 Jan. 20, 1909 120.0 97,200 1910 Nov. 23, 1909 131.0 144,000
1911 Nov. 29, 1910 118.5 94,300 1912 Jan. 13, 1912 121.5 109,000 1913 Jan. 18, 1913 114.5 75,800 1914 Jan. 26, 1914 112.5 67,000 1915 Feb. 3, 1915 104.5 33,100
1916 Feb. 7, 1916 122.5 116,000 1917 Mar. 25, 1917 106.3 40,300 1918 Jan. 13, 1918 112.5 67,000 1919 Jan. 19, 1919 117.5 91,000 1920 Dec. 9, 1919 109.5 53,500
1921 Dec. 30, 1920 115.5 81,000 1922 Nov. 30, 1921 114.5 76,000 1923 Jan. 6, 1923 118.5 96,000 1924 Dec. 7, 1923 106.0 39,100 1925 Dec. 30, 1924 122.5 116,000
1926 Feb. 5, 1926 112.5 67,000 1927 Feb. 21, 1927 132.5 185,000 1928 Mar. 27, 1928 112.5 67,000 1929 Apr. 15, 1929 107,7 45,400 1930 Dec. 20, 1929 111.5 62,000
1931 Apr. 1, 1931 109,0 51,000 1932 Mar. 19, 1932 120.3 104,000 1933 Jan. 3, 1933 119.6 101,000 1934 Jan. 24, 1934 109.7 53,200 1935 Dec. 20, 1934 114.7 76,600
1936 Jan. 13, 1936 121.6 111,000 1937 Apr. 14, 1937 118.2 94,000 1938 Feb. 7, 1938 122.6 119,000 1939 Mar. 13, 1939 110.6 57,300 1940 Feb. 29, 1940 116.1 83,500
15 Table 1. --Annual peaks for Umpqua River near Elkton, Oreg. (stat ion 3210) --Continued
Elevation Water (in feet Discharge year Date above msl) (in cfs)
1941 Dec. 27, 1940 113.4 70,400 1942 Dec. 19, 1941 114.2 74,200 1943 Dec. 31, 1942 132.7 186,000 1944 Nov. 5, 1943 109.6 52,000 1945 Feb. 14, 1945 114.7 76,500
1946 Dec. 29, 1945 131.7 179,000 1947 Dec. 14, 1946 114,2 74,000 1948 Jan. 7, 1948 129.4 154,000 1949 Dec. 12, 1948 121.1 109,000 1950 Jan. 22, 1950 114.9 78,000
1951 Oct. 30, 1950 135.8 208,000 1952 Feb. 2, 1952 113.9 72,500 1953 Jan. 19, 1953 134.6 199,000 1954 Nov. 23, 1953 134.0 195,000 1955 Dec. 31, 1954 111.4 60,400
1956 Dec. 22, 1955 137.2 218,000
Site 1,800 feet downstream from Smith Bridge
1957 Dec. 12, 1956 123.4 131,000 1958 Dec. 21, 1957 123.4 131,000 1959 Jan. 12, 1959 117,2 95,200 1960 Feb. 9, 1960 116.6 91,700 1961 Feb. 11, 1961 121.4 119,000
1962 Nov. 23, 1961 130.5 176,000 1963 Dec. 3, 1962 116.5 91,300 1964 Jan. 20, 1964 124.6 138,000 1965 Dec. 23, 1964 142.4 265,000 1966 Jan. 4, 1966 123.8 133,000
1967 Jan. 28, 1967 114.9 82,600 1968 Feb. 23, 1968 114.0 78,300 1969 Jan. 13, 1969 115.4 85,300 1970 Dec. 21, 1969 120.4 113,000 1971 Jan. 18, 1971 134,0 201,000
1972 Mar. 3, 1972 127.8 158,000
16 Table 2. --Annual peaks for North Umpqua Riverat Winchester, Oreg. (station 3195)
Elevation Water (in feet Discharge year Date abovemsl) (in cfs)
Site at Southern Pacific Railroad bridgeat Winchester, river mile 6.8
1909 Jan. 21, 1909 430.6 32,400 1910 Nov. 23, 1909 445.4 100,000 1911 Nov. 28, 1910 432.8 41,000 1912 Jan. 12, 1912 437.3 60,500 1913 Mar. 30, 1913 430.0 30,100
1924 Dec. 29, 1923 20,200 1925 Dec. 30, 1924 433.4 42,800 1926 Feb. 4, 1926 428.3 23,300 1927 Feb. 20, 1927 442.3 78,200 1928 Mar. 11, 1928 431.8 36,100
1929 Mar. 21, 1929 429.1 25,900 1/1951 Oct. 29, 1950 441.3 88,000
Site 400 feet downstream from county bridge,at river mile 1.8
1954 Nov. 23, 1953 401.4 89,000 1955 Dec. 31, 1954 388.0 38,100 1956 Dec. 22, 1955 402.1 92,500 1957 Dec. 11, 1956 397.3 75,400 1958 Dec. 21, 1957 393.1 58,600
1959 Jan. 27, 1959 386.8 34,000 1960 Feb. 8, 1960 385.7 30,000 1961 Nov. 25, 1960 390.1 46,600 1962 Nov. 23, 1961 397.7 76,800 1963 Dec. 2, 1962 388.7 40,800
1964 Jan. 20, 1964 391.2 50,800 1965 Dec. 22, 1964 407.2 V150,000 1966 Jan. 6, 1966 392.5 56,200 1967 Jan. 28, 1967 387.4 35,800 1968 Feb. 23, 1968 388.6 40,500
1969 Nov. 9, 1968 387.0 34,000 1970 Dec. 21, 1969 390.5 48,200 1971 Jan. 18, 1971 399.4 84,300 1972 Mar. 3, 1972 397.0 73,900
1/ Not previously published. 2/ Revised.
17 Table 3. --Annual peaks for North IJmpqua River near Glide, Oreg. (station 3185)
El evat ion Water '(in feet Discharge year Date above msl) (in cfs)
1910 Nov. 22, 1909 671.1 94,000 1916 Nov. 25, 1915 661.9 42,000 1917 Apr. 11, 1917 656.5 18,100 1918 Jan. 12, 1918 662.0 42,500 1919 Jan. 17, 1919 658.5 26,100
1920 Nov. 3, 1919 659.9 32,400 1922 Nov. 21, 1921 662.9 50,000 1928 Mar. 11, 1928 660.3 35,200 1929 Apr. 14, 1929 657.9 24,300 1930 Dec. 19, 1929 658.3 26,100
1931 Apr. 1, 1931 660.0 33,800 1932 Mar. 19, 1932 665.2 59,500 1933 Jan. 2, 1933 658.9 28,400 1934 Jan. 23, 1934 658.5 27,000 1935 Dec. 20, 1934 661.2 39,500
1936 Jan, 4, 1936 661.3 40,000 1937 Apr. 14, 1937 662,2 44,500 1938 Jan, 22, 1938 661.4 40,500 1951 Oct. 29, 1950 668.3 80,000 1956 Dec. 22, 1955 669.6 90,000
111965 Dec. 22, 1964 674.4 138,000
1/ Not previously published.
18 Table 4.--Discharges used to develop the flood profiles
Discharge, in cubic feet per second December Gaging11 10-year 25-year 100-year 500-year 1964 station flood flood flood flood flood
North TJmpqua River above Rock Creek, near Glide (3175) 48,900 61,200 81,000 105,000
North Umpqua River near Glide (3185) 72,000 94,400 135,000 191,000 138,000
North Umpqua River at Winchester (3195) 76,900 100,000 142,000 200,000 150,000
Umpqua River near Elkton (3210) 175,000 220,000 294,000 385,000 265,000
1/ Number following station name is the gaging station number.
19 Table5. --Profile elevations for the Iimpqua River above Scottsbur
Distance up- Elevation, in feet above mean sea level stream from Scottsburg 100-year December 10-year Low Cross bridge flood 1964 500-year 100-year 25-year 2/ section (feet) (adjusted)- flood flood flood flood flood water Thalweg- 0.8 -12.7 1 220 35.2 40.8 52.1 42.4 33.2 27.2 2 1,215 35.5 41.0 52.4 42.7 33.6 27.6 1.2 -17.2 3 2,675 36.3 42.2 52.9 43.9 34.3 28.4 1.7 -10.2 3,535 37.0 43.0 53.5 44.7 35.0 29.0 2.7 -7.2 4 -9.6 5 4,470 37.4 43.9 54.2 45.5 35.4 29.6 3.8
6 5,715 38.3 45.0 55.5 46.7 36.4 30.5 4.8 -17.0 40.1 46.8 57.8 48.2 38.3 32.5 6.5 -7.0 7 7,480 -13.0 8 8,600 41.4 47.9 59.2 49.4 39.6 33.9 8.4 9 9,690 42.0 49.0 60.9 50.8 40.2 34.7 9.0 -1.4 10 10,510 43.9 50.0 62.0 51.9 42.1 36.7 9.6 -25.0
11 11,655 45.2 51.0 63.6 53.1 42.8 37.3 10.0 -2.2 12 12,630 46.7 52.4 65.2 54.6 44.6 38.9 11.8 5.4 Gaging sta- tion 3229 13,350 Wells Creek 13,700 -5.4 13 13,995 48.9 54.6 67.8 56.9 46.8 41.1 13.0 14 15,515 49.9 55.7 68.6 57.9 47.8 42.0 13.5 0.6 50.3 56.0 68.8 58.2 48.2 42.4 14.2 1.8 15 16,535 -6.7 16 17,915 51.0 56.5 69.0 58.6 49.0 43.3 15.2 17 19,250 51.2 56.7 69.2 58.8 49.2 43.5 15.8 8.4
18 20,500 53.1 58.5 70.5 60.6 51.2 45.5 16.6 5.2 19 21,660 54.0 59.2 70.8 61.1 52.0 46.4 16.5 -4.5 20 22,820 54.4 59.6 71.0 61.5 52.5 46.9 16.6 -6.8 21 24,125 55.0 60.1 71.3 62.0 53.0 47.5 16.8 -10.8 22 25,232 55.6 60.7 71.8 62.5 53.7 48.2 16.9 -.9
23 26,232 56.5 61.5 72.5 63.4 54.6 49.0 17.0 -.5 24 27,297 57.0 62.0 72.9 63.8 55.2 49.6 17.1 6.4 Burchard Creek 27,600 25 28,387 58.0 62.8 73.6 64.6 56.0 50.6 17.2 8.0
26 29,450 58.8 63.5 74.2 65.3 56.8 51.4 17.3 5.5 59.1 63.8 74.3 65.5 57.2 51.8 17.4 9.5 27 30,607 4.4 28 31,587 59.7 64.3 74.8 66.0 57.8 52.5 17.4 29 32,150 60.0 64.4 74.8 66.1 58.0 52.7 18.4 6.5 30 33,063 60.7 65.2 75.7 67.0 58.7 53.4 18.8 7.0 Weatherly Creek 33,550 31 34,320 61.7 66.0 76.2 67.8 59.8 54.5 19.1 8.7 32 35,235 62.2 66.4 76.4 68.2 60.3 55.0 19.4 9.5 33 36,338 63.0 67.0 76.8 68.7 61.2 55.8 20.2 9.3
34 37,543 63.6 67.9 77.3 69.4 61.8 56.4 20.6 11.7 Lutsinger Creek 38,330 35 39,433 64.1 68.4 77.7 69.8 62.4 57,0 21.6 15.6 36 40,678 64.9 69.1 78.2 70.4 63.1 57.8 2L8 13.3
37 41,658 65.6 69.7 78.6 71.0 63.8 58.5 22.0 12.0 38 42,883 66.3 70.3 79.1 71.6 64.5 59.2 22.2 10.0 39 44,013 67.0 71.3 79.6 72.2 65.4 60.0 22.4 7.8 40 45,138 67.5 71.7 79.8 72.7 65.8 60.6 22.6 17.0 41 46,213 68.0 72.2 80.1 73.1 66.3 61.1 22.8 5.7
42 47,263 68.7 72.8 80.8 73.8 67.0 61.8 24.2 18.2 43 48,403 69.0 73.3 81.3 74.3 67.4 62.2 25.2 17.7 44 49,490 69.6 74.0 81.9 75.0 67.9 62.8 25.9 18.0 45 50,343 70.2 74.8 82.8 75.7 68.7 63.5 26.2 13.0 46 51,330 70.5 75.1 83.1 76.1 69.0 63.8 26.6 22.0 24.6 47 52,195 71.2 75.6 83.4 76.5 69.6 64.4 28.2 48 53,355 71.6 76.0 83.8 76.9 70.0 64.8 32.2 20.0 49 54,305 71.8 76.2 84.0 77.1 70.3 65.0 38.4 31.0 27.7 50 55,280 72.8 77.2 84.6 78.1 71.3 66.2 38.7 51 56,305 73.4 77.6 85.3 78.7 71.9 67.0 42.2 22.0
52 57,545 74.2 78.3 86.0 79.4 72.7 67.9 42.4 30.0 58,605 74.9 78.9 86.8 80.1 73.5 68.7 43.2 38.7 53 27.3 54 59,745 76.4 80.2 88.0 81.6 75.0 70.3 43.8 60,995 77.3 81.0 88.9 82.5 75.9 71.2 44.0 29.0 55 32.7 56 61,895 78.3 81.6 90.0 83.5 77.0 72.2 44.2
Footnotes at end of table.
20 Table5. --Profile elevations for the Umpqua River above Scottsburg--Continued
Distance up- Elevation, in feet above mean sea level stream from Scottsburg 100-year December Cross bridge flood 1964 500-year 100-year 25-year 10-year Low section (feet) (adjusted)1' flood flood flood flood flood water Thaiwesa
57 62,722 79.1 82.2 90.7 84.3 77.7 73.0 45.3 35.0 Paradise Creek 62,870 58 64,017 80.1 83.4 91.3 85.3 78.8 74.1 45.8 24.0 59 65,452 81.5 84.6 92.4 86.5 80.2 75.5 46.5 34.0 60 66,875 83.5 86.0 94.0 88.5 82.2 77.3 47.1 40.5 61 68,155 84.9 87.1 94.7 89.5 83.6 78.7 47.3 30.0 62 69,392 85.6 88.2 95.3 90.2 84.3 79.4 47.6 30.0 63 70,715 86.5 89.4 96.3 91.1 85.1 80.3 48.2 31.7 64 72,125 87.7 90.7 97.2 92.1 86.3 81.4 48.8 42.8 65 73,535 89.4 92.0 99.0 93.9 88.0 83.0 49.3 45.0 66 75,175 90.1 93.0 99.7 94.5 88.7 83.7 50.1 45.3 67 76,210 91.0 94.2 100.2 95.3 89.5 84.2 51.4 45.3 68 77,595 92.1 95.5 101.5 96.4 90.6 85.3 54.0 48.0 Sawyer Creek78,340
69 79,160 93.2 96.9 102.9 97.7 91.9 86.6 54.7 46.0 70 80,775 94.6 98.2 104.3 99.1 93.2 88.0 56.0 44.0 71 82,045 95.5 99.3 105.4 100.2 94.0 88.7 57.0 43.0 72 82,880 96.4 100.2 106.2 100.9 94.9 89.7 58.8 47.0 73 83,830 97.3 101.0 107.0 101.7 96.0 90.7 59.8 47.5 74 84,510 97.8 101.5 107.8 102.3 96.4 91.1 60.4 42.6 75 85,440 98.5 102.5 108.2 103.0 97.4 92.0 61.2 50.0 76 86,445 99.3 103.0 109.0 103.7 97.9 92.5 61.4 53.6 77 87,765 99.9 103.6 109.4 104.2 98.5 93.3 62.0 55.2 78 88,885 100.0 103.9 109.5 1.04.7 99.0 94.0 62.7 48.0 79 89,870 100.8 1.04.3 110.2 105.2 99.7 94.7 63.0 48.0 80 90,625 101.5 104.8 110.6 105.7 100.5 95.4 63.2 52.1 81 91,350 102.1 105.2 111.0 106.2 101.0 95.8 63.3 51.2 82 92,510 102.9 106.1 111.6 107.2 101.9 96.6 63.4 48.3 83 93,585 104.0 106.9 112.0 107.9 102.9 97.7 63.5 51.4 84 94,685 104.5 107.4 112.4 108.2 103.4 98.2 63.8 55.7 85 95,860 105.1 108.1 113.2 109.0 104.0 98.8 64.0 57.2 86 97,095 105.8 108.9 114.2 109.8 104.7 99.6 64.1 57.8 87 98,555 106.5 109.4 114.6 110.2 105.5 100.4 64.3 53.7 88 99,835 107.3 110.2 115.5 111.1 106.3 101.1 64.5 58.5 89 100,985 108.4 111.1 116.2 112.0 107.3 102.0 64.8 53.7 90 102,345 109.3 112.0 117.0 112.9 108.3 103.0 65.4 57.8 91 103,575 109.7 112.4 117.4 113.2 108.7 103.5 66.0 57.4 92 104,705 110.5 113.2 118.0 114.0 109.5 104.2 66.0 60.4 93 105,775 IL1.0 114.5 119.8 115.3 109.7 104.5 72.0 62.0 94 107,440 112.7 116.1 122.3 117.2 111.4 106.0 73.5 44.0 95 108,135 113.3 117.0 123.5 118.2 111.8 106.4 74.3 60.6 Elk Creek 109,730 96 110,085 114.8 118.7 125.5 119.8 113.3 107.9 77.2 69.0 Beckley ridge 110,230
97 110,412 115.2 119.0 126.0 120.3 113.7 108.4 77.3 67.0 98 111,349 115.5 119.3 126.3 120.6 114.0 108.8 77.6 67.0 99 112,182 115.9 119.6 126.6 120.9 11.4.4 109.2 78.0 63.7 100 113,699 116.3 119.8 126.7 121.0 114.8 109.7 78.3 63.4 101 114,919 116.8 120.3 127.1 121.5 115.3 110.2 78.6 64.0 102 116,232 117.3 120.6 127.4 122.0 116.0 110.9 79.2 56.6 103 117,342 117.9 121.2 128.2 122.6 116.6 111.4 79.7 54.0 104 118,587 118.9 122.2 129.4 123.7 117.6 112.3 80.3 58.5 105 119,600 119.2 122.5 129.8 124.0 117.8 112.5 80.7 65.8 106 120,563 119.3 122.6 129.9 124.1 118.0 112.8 81.0 70.0 107 121,568 120.2 123.3 130.3 124.8 118.9 113.6 81.1 68.0 108 122,403 121.0 123.8 130.6 125.2 119.7 114.5 81.3 68.0 109 123,560 121.6 124.3 131.0 125.7 120.3 115.1 81.4 65.0 110 124,635 122.2 124.8 131.7 126.3 120.8 115.6 81.8 74.7 111 125,643 123.2 125.7 132.5 127.3 121.8 116.6 82.0 63.0 112 126,750 123.4 126.0 132.8 127.5 122.0 116.9 82.1 64.0 113 127,725 123.8 126.4 133.1 128.0 122.4 117.2 82.5 69.4 114 128,705 124.5 127.2 134.2 129.0 123.0 117.9 82.7 74.6 115 130,045 125.4 128.0 135.0 129.8 123.9 118.7 84.2 60.0 116 131,035 125.6 128.2 135.2 130.0 124.1 118.9 85.1 58.0 Footnotes at end of table.
21 Table5.--Profile elevations for the Umpgua River above Scottsburg--Continued
Distance up- Elevation, in feet above mean sea level stream from Scottsburg l00-year December Cross bridge flood 1964 500-year 100-year 25-year 10-year Low section (feet) (adjusted)i/ flood flood flood flood flood water ThalwegV
117 132,165 126.0 128.7 135.7 130.5 124.5 119.3 85.4 74.2 118 133,110 126.6 129.2 136.0 131.0 125.2 120.0 85.7 72.5 119 134,090 127.5 130.2 136.8 132.0 126.1 121.0 86.0 73.8 120 135,160 128.8 131.4 137.8 133.2 127.4 122.3 86.6 80.0 121 136,090 129.3 131.9 138.3 133.7 127.9 122.7 88.0 81.7
122 137,215 130.0 132.5 138.9 134.3 128.5 123.4 88.4 81.7 123 138,090 130.2 132.6 139.0 134.5 128.7 123.7 89.0 82.8 124 139,700 130.7 133.0 139.2 134.7 129.3 124.5 89.5 74.3 125 140,870 131.4 133.7 140.0 135.5 130.0 125.0 90.1 85.0 126 141,820 131.8 134.0 140.2 135.8 130.5 125.5 90.8 83.6
127 143,125 132.5 134.6 140.8 136.4 131.1 126.1 91.6 82.5 128 144,435 133.0 135.2 141.2 137.0 131.7 126.7 92.0 72.0 129 145,695 133.1 135.3 141.6 137.2 131.8 126.8 92.2 73.5 130 146,695 134.6 137.2 142.4 139.3 133.1 128.0 93.0 78.0 131 147,770 135.3 139.2 143.0 140.0 133.8 128.5 93.3 81.0
132 148,650 135.8 140.2 143.7 140.7 134.4 129.0 94.0 71.0 133 150,110 137.0 141.0 144.9 141.8 135.6 130.0 95.3 86.0 134 151,285 138.0 142.4 145.7 142.7 136.4 130.4 95.6 86.4 Gaging sta- tion 3210151,285
135 152,735 138.7 143.0 146.3 143.4 137.0 131.1 96.0 85.3 Smith Bridge 153,170 136 153,465 139.3 143.6 147.1 144.0 137.7 131.8 96.2 84.0 137 154,130 139.7 143.9 147.6 144.3 138.0 132.5 96.3 66.0 138 154,960 140.4 144.5 148.8 145.2 136.7 132.9 96.6 72.4
139 155,855 141.3 145.5 150.4 146.3 139.7 133.8 99.7 81.5 140 156,755 141.7 145.8 151.0 146.7 140.9 134.2 105.2 93.0 141 157,565 142.5 146.6 152.2 147.6 140.8 135.0 109.2 96.6 142 158,850 143.2 147.2 153.0 148.3 141.5 135.8 112.0 104.0 143 160,175 144.0 147.9 153.9 149.0 142.3 136.8 113.0 99.8
144 161,150 145.0 148.7 154.9 150.0 143.3 137.8 114.2 99.0 145 162,350 147.1 150.8 158.0 152.4 145.3 139.9 115.1 100.0 146 163,600 148.0 151.5 158.7 153.2 146.3 141.0 115.2 99.5 147 165,050 148.8 152.3 159.6 154.0 147.2 141.9 115.4 100.4 148 165,970 150.0 153.5 161.3 155.4 148.4 143.0 115.5 102.8
149 167,020 150.8 154.3 162.2 156.2 149.2 143.8 115.6 106.5 150 168,440 151.4 154.9 162.9 156.8 149.8 144.5 115.6 99.5 151 169,460 152.0 155.3 163.4 157.3 150.3 145.0 115.9 99.3 152 170,760 152.7 156.0 164.1 158.0 151.0 145.7 116.3 104.7 153 171,970 153.5 156.7 164.9 158.7 151.8 146.5 117.0 105.4
154 172,960 154.0 157.1 165.4 159.2 152.2 147.9 117.8 103.1 155 173,905 155.0 158.2 166.7 160.3 153.3 148.0 120.4 107.2 156 175,090 155.6 158.7 167.2 160.8 153.9 148.7 122.2 106. 5 157 176,615 156.4 159.5 168.0 161.7 154.7 149.6 124.0 112.8 158 177,790 157.1 160.3 168.7 162.5 155.5 150.3 124.2 108.0
159 179,010 157.8 160.9 169.2 163.0 156.1 151.0 124.5 109.8 160 179,865 159.6 162.7 171.4 165.0 157.9 152.7 124.7 111.0 161 181,080 160.2 163.4 172.0 165.7 158.6 153.4 125.5 104.8 162 182,255 161.5 164.6 173.5 167.0 159.9 154.8 129.3 123.6 163 183,275 162.1 165.2 174.2 167.6 160.5 155.5 131.5 125.3
164 184,320 162.7 165.9 174.7 168.2 161.2 156.3 133.2 121.5 165 185,435 163.5 166.5 175.3 168.9 162.0 157.2 134.5 128.3 166 186,445 165.2 168.3 177.3 170.7 163.8 159.0 136.6 128.9 167 187,500 167.2 170.2 179.4 172.6 165.8 161.1 137.8 118.1 168 188,550 168.6 171.5 180.6 173.8 167.1 162.6 138.5 129.3
169 189,495 169.2 172.0 181.0 174.3 167.7 163.4 139.3 130.1 170 190,525 170.4 173.1 181.9 175.4 169.0 164.7 139.8 129.1 171 191,585 171.3 174.0 182.8 176.3 169.8 165.6 140.2 124.5 172 192,730 172.5 175.2 183.8 177.4 171.0 166.7 140.5 132.9 173 193,895 173.8 176.5 185.0 178.7 172.4 168.2 140.7 129.3
174 194,805 175.1 177.7 186.5 180.0 173.0 169.4 140.8 126.6 175 196,070 175.8 178.4 187.2 180.7 174.4 170.0 141.0 130.5 176 196,920 176.6 179.3 188.2 181.6 175.2 170.8 141.2 127.4 177 197,905 177.8 180.6 189.9 183.0 176.4 171.8 141.4 126.4 178 198,715 178.6 181.4 190.8 183.8 177.0 172.5 141.6 133.7 Footnotes at end of table.
22 Table5.--Ptofile elevationsor the Jmpqua River ii,ove Scotsbur--Continued
Distance up- Stream from Elevationinfeet above mean sea level Scottsburg 100-year December Cross bridge fLood 1964 500-year 100-year 25-year 10-year Low section (feet) (adjusted)11' flood flood flood flood flood water ThalwegV
179 199,960 179.4 182.1 191.4 184.5 177.8 173.4 141.8 131.4 180 200,830 180.8 182.5 192.1 185.0 178.2 173.8 141.9 121.4 181 201,740 180.7 183.4 192.9 185.9 179.1 174.6 142.2 130.6 182 202,540 181.0 183.8 193.1 186.2 179.5 175.0 143.2 129.6 183 203,415 181.7 184.4 193.5 186.8 180.2 175.6 144.2 131.0 184 204,405 182.3 185.1 194.1 187.5 180.8 176.2 146.0 136.2 185 205,370 182.9 185.6 194.6 188.0 181.3 176.8 146.9 130.5 186 206,335 183.4 186.0 195.0 188.5 181.8 177.3 148.0 142.5 187 207,345 184.3 187.0 196.2 189.5 182.7 178.1 149.0 143.0 188 209,055 185.4 188.1 197.5 190.6 183.9 179.4 151.4 141.3 189 210,450 186.3 189.0 198.3 191.5 184.8 180.3 152.6 138.0 190 211,670 187.1 189.8 199.0 192.2 185.6 181.0 153.6 135.0 191 213,545 189.2 191.4 200.4 193.8 187.6 182.9 154.0 133.4 192 214,310 189.6 192.3 201.4 194.8 188.1 183.5 154.7 137.2 193 215,100 190.3 193.0 202.2 195.5 188.7 184.2 156.0 137.3 194 216,305 192.0 194.8 204.2 197.3 190.4 185.9 156.8 143.6 195 217,235 193.0 195.7 205.1 198.2 191.4 187.0 157.2 145.5 19 218,545 194.5 197.3 206.6 199.7 193.0 188.6 157.6 144.9 197 219,640 195.4 198.0 207.2 200.4 194.0 189.6 158.2 147. 5 198 220,760 197.2 199.7 208.7 202.1 195.8 191.5 159.3 152.5 199 221,750 198.2 200.7 209.5 203.1 196.9 192.5 159.8 154.5 200 222,900 198.9 201.4 210.0 203.6 197 .5 193.2 160.6 143.8 201 224,050 199.6 202.0 210.9 204.3 198.2 193.8 161.9 146.6 202 225,460 200.7 203.1 211.8 205.4 199.3 194.8 162.4 142.6 Kellogg Bridge 225,770
203 226,805 202.8 205.4 214.7 207.9 201.3 196.3 163.2 152.4 204 227.845 203.2 205.7 215.0 208.1 201.8 196.9 163.7 155.0 205 228,980 203.7 206.2 215.3 208.6 202.3 197.5 164.0 153.9 206 230.245 204.5 207.0 215.8 209.2 203.0 198.2 164.5 155.8 207 231,525 205.2 207.6 216.3 209.8 203.7 199.0 165.3 157.9 208 232,740 206.0 208.4 216.7 210.5 204.4 199.8 166.7 156.8 209 234,270 207.3 209.7 218.2 211.9 205.7 200.9 167.6 162.7 210 235,385 207.6 210.0 218.4 212.2 206.0 201.2 168.7 158.8 211 236,340 208.0 210.4 219.0 212.6 206.4 201.6 169.7 162.2 212 238,085 209.0 211.6 220.6 213.9 207.5 202.6 170.3 162.7 213 239,405 209.5 212.0 220.9 214.3 208.0 203.4 170.4 161.7 214 240,625 210.1 212.6 221.2 214.8 208.7 204.0 170.8 163.0 215 242,078 211.0 213.5 221.7 215.6 209.7 204.8 171.2 153.8 216 243,325 211.7 214.0 221.8 216.0 210.4 205.4 171.6 153.2 217 245,045 213.7 216.1 223.5 218.2 212.3 207.0 172.0 160.2 218 245,835 214.3 216.8 224.3 219.0 213.0 207.7 172.8 161.8 219 246,620 214.5 217.0 224.5 219.1 213.1 207.9 175.2 164.5 220 247,700 215.7 218.3 226.0 220.4 214.3 208.9 177.3 171.2 221 248,880 216.2 218.8 226.6 221.0 214.8 209.5 183.2 171.6 222 249,340 216.3 219.0 226.7 221.1 215.0 209.6 183.5 171.0
223 250,455 216.5 219.1 226.6 221.2 215.2 210.2 184.5 174.5 224 251,585 218.3 220.9 228.8 223.1 217.0 212.0 184.6 177.0 225 252,740 219.6 222.3 230.4 224.5 218.3 213.4 184.8 180.5 226 253,845 220.6 223.4 232.2 225.8 219.2 214.2 184.8 179.7 227 255,675 221.7 224.5 233.3 226.8 220.4 215.4 184.9 176.1 228 257,343 222.6 225.2 233.7 227.5 221.2 216.3 185.1 171.2 229 258,905 223.7 226.4 234.9 228.7 222.4 217.3 186.0 168.6 230 260,055 225.2 228.0 236.7 230.3 223.8 218.6 186.4 177.9 231 260,779 225.7 228.4 237.0 230.7 224.3 219.0 186.7 177.2 232 261,564 226.0 228.8 237.3 231.0 224.7 219.4 187.0 167.5
233 262,349 226.3 229.0 237.6 231.3 225.0 219.8 190.6 181.0 234 263,436 227.1 229.8 238.3 232.0 225.8 220.7 194.3 181.7 235 264,393 228.0 230.7 239.1 232.9 226.7 221.7 195.6 175.0 236 265,388 228.7 231.4 240.4 233.7 227.4 222.3 195.8 180.7 Yellow Creek 265,540
237 266,728 230.4 233.1 242.0 235.4 229.0 223.9 195.9 188.3 238 267,600 231.0 233,7 242.6 236.0 229.7 224.7 197.9 181,2 239 268,935 231.7 234.4 243.2 236.7 230.5 225.5 198.6 185.8 240 270,063 252.8 235.6 244.5 237.9 231.5 226.6 201.2 194.2 Bullock Bridge 270,295 Footnotes at end of table.
23 Table5.-Profi1e eiev.tons tor ththnpqa aiver above Scottslrnr--Coot inued
Distance up- Elevation, in feet above mean sea level stream from Scottsburg 100-year December Cross bridge flood 1964 500-year 100-year 25-year 10-year Low Section (feet) (adjusted) flood flood flood flood flood water Thalwe-
241 270,395 233.5 236.2 245.3 238.5 232.2 227.3 202.2 194.2 242 271,160 235.0 237.8 247.0 240.2 233.7 228.8 203.4 198.4 243 271,880 236.5 239.2 248.3 241.6 235.1 230.2 204.2 201.0 244 272,752 237.5 240.3 249.4 242.6 236.1 231.3 207.3 201.5 245 273,747 239.7 242.3 251.2 244.5 238.4 233.9 207.6 190.0
246 274,744 239.7 242.3 251,2 244.5 238.4 233.9 208.0 190.0 247 275,774 241.7 244.3 253.1 246.5 240.4 235.9 208.5 199.0 248 276,934 243.1 245.7 254.5 247.9 241.7 237.3 209.0 201.6 249 278,184 243.5 246.0 254.7 248.2 242.1 237.7 210.2 201.0 250 279,274 244.3 246.8 255.3 249.0 243.0 238.5 210.5 202.7
251 280,119 244.8 247.3 255.8 249.5 243.5 239.0 210.7 193.4 252 281,194 246.2 248.9 257.8 251.4 244.9 240.2 211.0 200.7 253 282,307 247.2 249.9 259.4 252.4 245.9 241.2 211.9 202.0 254 283,429 248.4 251.0 260.0 253.3 247.1 242.4 212.2 207.0 255 284,429 249.3 251.8 260.4 254.0 248.0 243.3 212.3 199.5
256 285,317 250.2 252.8 261.5 255.0 248.9 244.0 212.6 201.0 257 286,277 251.8 254.5 263.6 256.8 250.4 245.5 213.6 204.4 258 287,662 253.3 256.1 265.4 258.5 251.9 246.7 218.3 202.3 259 288,712 253.9 256.7 266.2 259.1 252.5 247.4 220.7 210.0 260 289,767 254.5 257.2 266.6 259.6 253.0 248.2 220.9 212.8
261 290,882 255.4 258.0 267.2 260.4 254.0 249.2 221.0 202.4 262 292,177 256.6 259.2 268.1 261.5 255.3 250.7 221.6 209.0 263 293,307 258.0 260.5 269.4 262.8 256.7 252.1 222.7 208.2 264 294,515 259.7 262.1 270.8 264.3 258.3 253.8 224.6 208.0 265 295,580 260.0 262.5 271.0 264.7 258.8 254.3 229.6 217.5
266 296,870 261.4 263.8 272.0 266.0 260.1 255.5 230.6 219.0 267 298,815 262.5 264.9 273.2 267.1 261.2 256.6 231.0 213.3 268 300,440 264.0 266.6 275.4 268.9 262.7 257.9 231.2 220.4 269 301,548 265.0 267.5 276.3 269.9 263.6 258.8 232.0 219.7 270 303,238 266.8 269.3 277.8 271.5 265.5 260.9 233.0 212.0
271 304,543 267.9 270.4 278.9 272.6 266.6 262.0 233.5 217.0 272 305,408 269.0 271.5 279.9 273.7 267.7 263.2 235.2 226.0 273 306,023 269.5 272.0 280.3 274.2 268.2 263.8 236.2 230.0 274 306,997 270.9 273.3 281.5 275.4 269.6 265.4 236.8 228.5 275 308,097 271.8 274.3 282.3 276.4 270.6 266.4 240.2 236.0
276 309,197 273.6 276.0 284.5 278.2 272.3 268.0 241.8 237.0 277 310,157 274.9 277.4 285.8 279.6 273.6 269.4 243.0 238.0 278 311,015 276.1 278.6 287.0 280.8 274.8 270.6 245.2 236.0 279 312,021 276.8 279.2 287.7 281.4 275.5 271.4 245.5 226.0 280 313,166 277.3 279.8 288.3 282.0 276.0 271.9 245.8 224.0
281 314,016 278.1 280.6 289.0 282.8 276.8 272.7 246.0 233.0 282 314,888 279.3 281.8 290.3 284.0 278.0 273.7 246.3 236.8 283 315,953 280.9 283.4 291.8 285.6 279.5 275.1 247.5 240.0 284 317,060 282.2 284.6 292.7 286.7 280.8 276.5 249.0 241.0 285 318,230 283.0 285.4 293.2 287.5 281.7 277.3 249.2 236.7
286 319,073 283.6 286.0 293.7 288.0 282.3 278.0 249.5 234.0 287 319,893 285.0 287.5 295.4 289.6 283.6 279.2 250.5 244.5 288 320,758 285.7 288.2 296.2 290.4 284.4 279.8 250.6 239.0 289 321,758 286.0 288.5 296.5 290.7 284.6 280.2 251.2 240.0 290 322,795 286.7 289.3 297.8 291.5 285.2 280.8 251.2 236.0
291 323,835 287.3 289.8 298.2 292.0 285.9 281.4 251.2 240.0 292 324,802 287.8 290.2 298.5 292.4 286.4 282.0 251.2 242.0 Wolf Creek 325,520 293 326,087 289.0 291.2 298.9 293.1 287.7 283.4 251.4 237.4 294 326,977 289.7 292.0 300.0 294.0 288.4 284.0 251.8 241.3
295 327,872 290.4 292.7 300.5 294.6 289.0 284.6 352.2 39.4 296 329,622 292.3 294.6 301.9 296.5 290.9 286.4 255.4 240.5 Tyee access bridge 330,470 297 330,632 292.8 295.0 302.5 297.0 291.4 287.0 257.6 241.5
298 331,782 293.7 296.0 303.6 298.0 292.4 288.0 259.0 243.0 299 333,022 296.3 298.7 307.0 300.9 294.9 290.4 262.7 250.2 30 333,947 297.3 299.8 308.1 302.0 295.9 291.5 263.6 245.6 301 334,957 298.8 301.3 309.9 303.6 297.4 293.0 264.0 256.0 302 336,169 299.7 302.2 310.9 304.5 298.3 293.9 265.7 258.7 Footnotes at end of table.
24 Table5.--Profile elevations for the Umpqua River above Scottsburg--Continued
Distance up- Elevation, in feet above mean sea level stream from Scottsburg 100-year December Cross bridge flood 1964 500-year 100-year 25-year 10-year Low SectiOn (feet) (adjusted)l flood flood flood flood flood water Thalwee2/
303 337,309 300.6 303.0 311.8 305.4 299.2 294.8 266.4 257.4 304 338,584 301.9 304.4 313.2 306.8 300.5 296.1 269.8 262.3 305 339,739 303.2 305.6 314.3 308.0 301.8 297.4 272.0 265.0 306 340,794 304.3 306.8 315.7 309.2 302.9 298.5 273.5 267.5 307 341,794 305.3 307.8 316.7 310.2 303.9 299.5 275.4 260.4 308 343,519 306.4 308.9 317.8 311.3 305.0 300.6 276.4 261.5 309 344,976 308.3 310.7 319.3 313.0 306.9 302.5 276.8 267.0 310 346,194 309.8 312.3 320.7 314.5 308.5 304.1 277.6 267.0 311 347,339 311.5 314.0 322.5 316.4 310.1 305.5 278.2 265.7 312 348,462 312.2 314.8 323.2 317.0 310.8 306.2 278.8 265.8 313 349,542 313.2 315.8 324.3 318.0 311.7 307.0 279.6 267.6 314 350,367 314.2 316.8 325.5 319.0 312.7 307.9 280.3 269.0 315 351,597 314.6 317.2 326.0 319.4 313.2 308.4 280.8 272.3 316 352,809 315.4 318.0 326.8 320.3 314.0 309.0 281.4 272.6 317 353,926 316.6 319.3 328.1 321.6 315.3 310.2 282.2 272.6 318 355,038 317.9 320.6 329.5 322.9 316.6 311.6 282.7 274.1 319 356,213 318.8 321.4 330.2 323.7 317.4 312.5 283.8 272.3 320 357,413 319.6 322.2 331.1 324.5 318.2 313.4 285.6 278.6 321 358,808 320.7 323.2 332.0 325.5 319.3 314.7 290.5 285.5 322 359,638 321.0 323.6 332.3 325.8 319.7 315.2 292.3 284.0 323 360,884 322.2 324.8 333.4 327.0 320.9 316.3 293.0 268.6 324 361,939 322.7 325.3 333.9 327.5 321.4 316.8 294.0 281.0 325 363,299 323.4 326.0 334.6 328.2 322.2 317.6 295.5 285.5 326 364,852 324.8 327.3 335.8 329.6 323.5 319.1 296.5 279.5 327 366,445 326.5 329.0 337.7 331.3 325.2 320.8 297.0 287.0 328 367,480 328.4 331.0 339.9 333.4 327.0 322.7 p97.4 272.7 329 368,305 329.9 332.5 341.4 335.0 328.6 324.0 297.9 287.7 330 369,145 330.8 333.5 342.3 335.9 329.5 325.0 298.2 290.0 331 369,803 331.0 333.6 342.4 336.0 329.6 325.2 299.2 283.5 332 370,603 331.4 333.9 342.6 336.3 330.0 325.6 299.6 286.0 3/333 371,355 332.4 334.9 343.5 337.3 331.1 326.7 300.9 282.7 3/334 32,355 333.7 336.0 345.3 338.7 332.0 327.5 -- -- 3/335 373,465 335.8 338.3 347.5 340.5 334.1 329.4 3/336 374,355 337.9 340.3 349.3 342.2 335.8 331.3
1/ Adjusted for storage in proposed Days Creek Lake. 2/ Thalweg, low point in channel. 3/ Cross sections 333-336 correspond to cross Sections 1-4 ofpart 1 (1972) and supersede those shown in part 1.
25 Table 6.--Profile elevations for the North Umpqoa River. Winchester Dam to Idleyld Park
Distance up- Elevation, in feet above mean sea level stream from December Cross Winchester Dam 1964 500-year 100-year 25-year 10-year Low section (in feet) flood flood flood flood flood water Thalweg-
V1 135 454.2 458.5 453.4 449.8 447.6 437.6 423.0 2 680 455.0 459.1 454.0 450.2 448.0 437.6 423 . 5 3 2,680 457.5 461.6 456.6 452.6 450.2 438.0 426.5 2Ji 4,280 459.7 464.0 459.0 454.7 452.0 438.2 429.0 5 5,216 461.0 465.2 460.2 456.0 453.2 438.3 430.0 V6 6,290 462.4 466.4 461.0 456.9 454.2 438.5 428.0 7 6,784 463.0 467.3 461.6 457.5 454.7 438.6 425.6 V8 7,630 465.4 469.9 464.0 459.5 456.5 439.0 429.0 V9 8,500 466.1 470.5 464.7 460.3 457.3 440.0 434.0 10 9,304 466.8 471.0 465.4 461.2 458.3 443.0 436.7 Il 10,627 469.4 473.1 468.2 464.1 461.1 447.6 439.0 11,560 477.8 482.7 476.2 471.1 467.7 450.5 441.0 13 12,312 478.3 483.0 476.8 471.7 468.3 451.5 433.5 14 13,997 479.8 484.6 478.3 473.2 469.8 455.3 449.0 V15 15,114 481.4 486.0 480.0 475.3 472.1 458.6 451.0
16 16,569 484.9 489.0 483.7 479.4 476.2 459.6 451.0 a'17 17,660 486.6 490.7 485.4 481.0 478.0 463.2 458.0 18 18,424 487.5 491.4 486.3 482.0 479.0 464.0 455.0 19 19,609 489.7 493.7 488.5 484.1 481.1 464.3 447.5 20 21,059 492.1 495.9 491.0 486.9 484.0 469.8 459.5
21 22,279 493.9 497.8 492.9 488.8 485.9 470.7 461.0 22 23,564 495.6 499.6 494.6 490.5 487.6 471.3 466.0 23 24,739 497.7 501.7 496.7 492.4 489.5 472.5 464.5 24 25,809 499.9 504.0 498.9 494.6 49L.6 477.2 472.2 25 27,254 502.9 506.9 501.9 497.9 495.3 480.3 475.3 V26 28,300 504.5 508.3 503.5 499.8 497.4 484.5 480.0 27 29,184 506.5 509.8 505.2 501.6 499.5 485.6 475.6 28 30,464 509.7 513.4 508.8 505.0 502.5 486.4 478.4 29 31,459 511.5 515.2 510.6 506.8 504.2 487.0 482.5 30 32,454 514.3 518.2 513.3 509.2 506.3 489.8 470.0
31 33,699 516.0 519.9 515.0 510.9 508.1 491.8 480.3 32 35,069 519.3 523.1 518.3 514.4 511.7 495.5 480.0 33 35,994 521.3 525.3 520.3 516.3 513.6 497.0 483.5 34 37,117 523.2 526.9 522.2 518.3 515.6 497.5 490.0 35 38,572 526.7 530.5 525.8 521.6 518.7 500.9 497.0
36 39,702 528.6 532.2 527.7 523.6 520.7 503.2 497.7 37 40,916 531.3 535.0 530.4 526.4 523.4 508.2 499.7 38 42,171 536.0 540.2 535.1 530.9 527.7 510.8 503.8 V39 43,325 540.0 544.1 539.0 534.4 531.0 511.4 504.0 40 44,840 542.0 546.1 541.1 536.7 533.5 515.5 508.5
41 46,400 544.2 548.4 543.2 538.8 535.6 518.5 507.5 42 47,405 546.3 550.5 545.2 540.7 537.6 521.0 512.5 43 48,553 549.3 553.6 548.2 543.7 540.8 523.8 517.0 44 49,883 552.1 556.4 551.1 546.6 543.8 526.8 519.0 Dixon Creek
45 51,413 554.2 558.2 553.3 549.2 546.3 528.0 518.5 a'46 52,730 556.6 560.2 555.6 551.5 548.6 533.0 528.0 47 53,678 558.5 562.3 557.6 553.4 550.6 535.5 528.0 48 55,018 563.7 567.8 562.3 557.7 554.4 536.8 510.0 Clover Creek
49 55,865 565.5 570.1 564.7 560.1 556.9 540.6 535.6 Vs0 56,700 569.1 573.4 568.4 564.0 561.0 543.0 540.0 51 57,500 570.8 575.2 570.1 565.8 562.8 545.3 520.0 52 58,500 572.0 576.0 571.0 566.6 563.6 545.6 527.0 53 59,858 573.0 577.2 572.2 567.8 564.7 545.8 531.3
54 61,476 576.7 580.2 576.1 572.2 569.2 548.3 543.3 V55 62,560 578.1 581.6 577.5 573.7 570.7 550.0 545.0 56 63,596 579.5 583.0 578.8 574.9 571.8 551.0 545.0 57 64,606 581.5 585.4 580.8 576.8 573.6 552.6 544.0 Oak Creek 64,800
58 65,724 584.1 588.4 583.9 579.4 576.2 553.0 548.5 59 66,784 585.8 590.3 585.5 580.9 577.6 556.8 553.0 68,116 588.5 593.2 588.2 583.6 580.5 566.2 557.7 61 69,166 591.1 595.8 590,8 586.5 583.8 567.1 562. 5 62 70,116 592.9 597.6 592.7 588.6 586.2 571.2 565.0
See footnotes at end of table.
26 Table 6.--Prof lie elevations for the North Umpqua River. Winchester Dais to Idlevid Park--Continued
Distance up- Elevation, In feet above mean sea level stream from December Cross Winchester Dam 1964 500-year 100-year 25-year 10-year Low 1/ section (in feet) flood flood flood flood flood water Thalweg-
63 71,336 596.3 601.0 596.0 592.1 589.8 573.1 569.0 64 72,626 600.1 605.0 599.8 595.7 593.0 575.8 568.3 65 73,606 602.3 607.2 602.0 597.6 594.9 577.2 569.0 66 74,771 605.0 610.0 604.7 600.2 597.5 580.3 576.0 67 75,791 607.4 612.4 607.1 602.5 599.8 584.0 575.5
68 76,773 610.1 615.4 609.7 604.9 602.0 586.0 572.0 69 77,940 611.9 617.1 611.5 606.8 604.0 588.6 580.0 70 79,072 617.4 622.7 617.0 612.1 609.1 590.6 583.0 80,000 619.4 624.7 619.1 614.3 611.4 595.0 591.0 72 80,625 619.9 625.0 619.5 614.9 612.0 596.0 564.0
73 81,910 622.2 628.0 621.8 616.7 613.6 598.0 592.3 74 82,770 623.2 628.9 622.8 617.8 614.8 599.7 587.0 75 83.565 624.6 630.1 624.2 619.3 616.3 602.0 587.0 76 84,640 627.8 633.8 627.5 622.4 619.3 603.5 589.3 Cooper Creek
77 85,670 630.4 636.0 630.1 625.0 621.8 606.0 597.0 78 86,600 632.4 638.1 632.0 626.8 623.7 608.1 595.4 79 87,865 634.2 639.8 633.9 629.0 626.0 610.5 603.0 80 88,885 636.7 642.2 636.4 631.3 628.3 611.0 603.4 81 89,615 638.5 643.8 638.2 633.1 630.1 612.1 604.5
82 90,945 640.7 646.1 640.4 635.5 632.6 615.6 610.5 83 91,770 641.8 647.1 641.5 636.7 633.9 617.5 610.0 84 92,837 643.9 649.2 643.6 638.9 636.1 621.8 608.7 85 94,054 646.7 652.0 646.4 641.9 639.2 624.4 614.3 86 94,954 648.8 654.0 648.4 644.1 641.5 626.3 611.0
87 96,504 651.6 657.0 651.3 647.0 644.3 630.2 619.3 Huntley Creek 88 97,394 653.0 658.5 652.7 648.7 646.2 630.6 615.0 89 98,634 656.6 660.4 656.4 652.3 649.5 631.0 625.2 90 99,624 658.1 661.8 657.9 653.5 650.6 634.8 630.0
91 100,644 659.0 662.6 658.8 654.5 651.6 634.8 627.0 92 101,519 660.5 664.1 660.3 656.0 653.0 635.2 630.5 93 102,545 662.2 665.8 662.0 657.7 654.8 636.0 629.5 94 103,402 663.5 667.0 663.3 659.0 655.8 637.0 633.0 95 104,567 665.2 668.7 665.0 660.7 657.5 641.9 635.5
96 105,782 667.6 671.6 667.4 663.1 660.1 644.6 639.3 97 106,764 669.5 673.4 669.3 665.2 662.4 649.5 643.3 98 107,727 672.3 676.2 672.0 668.1 665.5 651.3 638.0 Floyd Frear Bridge 107,800
99 108,259 673.7 677.6 673.4 669.5 666.9 651.5 643.8 Gaging station 3185 108,580 100 109,374 676.2 680.5 675.9 671.7 668.9 651.7 642.0 101 110,435 678.3 683.1 678.0 673.4 670.4 651.9 643.0
102 111,498 680.5 685.4 680.2 675.1 671.9 652.1 646.6 103 112,548 682.9 687.9 682.5 677.1 673.5 652.8 629.0 104 113,255 683.7 688.6 683.4 678.1 674.5 657.3 652.5 105 113,868 685.0 689.9 684.7 679.5 676.0 658,2 631.4 106 114,888 688.4 694.6 688.0 681.8 677.9 659.5 643.6
Little River 115,340 107 115,783 693.0 697.0 692.8 688.5 685.5 664.9 6530 108 116,580 695.6 700.3 695.4 690.7 687.5 667.0 659.0 109 117,524 697.7 702.6 697.4 692.5 689.1 667.8 659.0 110 118,314 700.1 705.6 699.8 694.5 690.9 670.7 655.4
111 119,259 701.0 706.8 700.8 695.4 691.8 671.5 660.7 112 120,159 702.7 708.2 702.4 696.8 693.0 672.8 666.1 113 120,883 703.5 709.0 703.2 697.6 694.0 674.5 659.0 114 121,928 704.7 710.5 704.4 698.8 695.0 675.8 671.2 115 123,443 707.4 713.2 707.1 701.6 697.7 677.6 668.5
French Creek 116 124,697 708.5 714.4 708.2 702.8 699.0 684.6 675.6 117 125,637 709.6 715.4 709.4 704.0 700.3 686.0 665.5 Lone Rock Bridge 125,870
See footnotes at end of table.
27 Table 6, --Prof lie elevations for the North Umpqua River. Winchester Dam to Idleyld Park--Continued
Distance up- Elevation. in feet above mean sea level stream from December Cross Winchester Dam 1964 500-year 100-year 25-year 10-year Low section (in feet) flood flood flood flood flood water Thaiweg-1,
118 126,382 711.0 717.0 710.7 705.2 701.4 686.4 678.4 119 127,320 712.4 718.2 712.1 706.9 703.4 687.1 678.0 120 127,990 714.1 719.9 713.8 708.5 705.0 687.5 680.5 121 128,748 716.0 721.9 715.8 710.3 706.9 687.9 682.4 122 129,500 718.6 724.8 718.3 712.6 709.1 689.2 677.2
123 130,100 720.4 727.0 720.1 714.2 710.4 691.6 676.0 124 130,800 721.0 727.6 720.7 714.7 711.0 692.0 677.5 125 131,415 721.6 728.1 721.3 715.3 711.6 692.3 685.4 126 132,465 724.0 730.7 723.7 717.8 714.1 695.8 691.0 &1127 133,200 726.5 733.3 726.2 720.2 716.6 697.5 693.0
128 134,170 730.3 736.8 730.0 724.0 720.2 703.8 684.5 Private foot- bridge 135,100 129 135,112 732.5 739.0 732.2 726.4 722.6 704.2 693.2 130 135,988 734.9 742.0 734.6 728.4 724.5 705.5 693.0
131 136,663 736.7 744.0 736.4 730.0 726.0 706.5 699.0 132 137,058 737.0 744.3 736.7 73D.4 726.4 706.7 695.2 133 137,730 738.1 745,4 737.8 731.6 727.6 708.4 690.0 134 138,620 739.3 746.6 739.0 732.7 728.7 710.6 699.0 135 139,770 741.1 748.4 740.8 734.9 731.0 711.2 705.0
136 140,910 743.6 750.7 743.3 737.5 733.8 712.0 693.0 137 141,800 745.6 753,0 745.2 739.2 735.3 715.4 686.5 138 143,003 746,3 753.9 746.0 740.0 736.2 716.7 710.0 139 144,005 750.0 757.6 749.6 743.6 739.8 719,7 710.0
1/ Thalweg, low point in channel. 2/ Section not shown on orthophoto map. 3/ Section revised for step-backwater computation.
28 Table 7. --Revised profile elevations for the South Utnpua River
Distance up- Elevation, in feet above mean sea level Station stream from 100-year December Report Map mouth fled 1964 500-year 100-year 25-year 10-year Low reference referencell (feet) (adjigsted)a' flood flood flood flood flood water Thalweg
1 3+40 0 399.3 400.6 404.7 401.5 398.3 395.3 363.4 356.0 2 8+75 535 363.5 351.7 3 13+05 965 363.6 357.3 4 25+15 2,175 400.4 401.6 405.9 402.5 399.0 396.0 363.8 356.5 5 38+55 3,515 366.1 363.8
6 50+10 4,670 -- 366.7 365.5 7 64+10 6,070 400.7 402.5 406.7 403.5 400.3 397.4 366.9 366.0 8 78+10 7,470 -- 371.8 371.0 9 84+75 8,135 372.5 369.5 10 95+60 9,220 373.0 370.7
11 100+15 9,675 401.0 403.0 407.0 404.0 401.2 399.1 373.1 370.0 12 112+60 10,920 373.2 369.0 13 124+80 12,140 373.5 371.7 14 132+65 12,925 375.4 373.0 15 138+90 13,550 40l2 3/403.6 407.3 404.4 401.8 399.9 375.6 372.3
16 151+20 14.780 -- 375.8 375.0 17 156+35 15,295 -- 377.1 376.0 18 166+65 16,325 401.4 J404.2 407.5 404.7 402.3 400.5 377.7 374.2 19 177+35 17,395 -- 378.5 376.0 20 182+40 17,900 401.7 31404.9 407.8 405.2 403.2 401.9 380.0 377.5
21 190+60 18,720 380.2 378.0 22 198+40 19,500 380.2 380.0 23 207+75 20,435 380.2 379.5 24 2254-25 22,185 403.2 3/406.8 408.8 407.0 405.8 405.0 380.4 379.0 25 239+45 23,605 404.0 3/4082 409.5 408.2 407.4 406.4 381.8 379.5
26 249+80 24,640 404.8 3/409.0 410.0 409.0 408.3 407.5 381.8 380.0 27, 28 259+60 25,620 405.1 j409.7 410.4 409.8 409.0 408.1 381.9 379.0 Conn Ford Bride 25,620 29 262+30 25,890 405.2 3/409.7 410.3 409.7 408.9 408.1 381.9 378.5 30 274+60 27,120 406.0 3/411.1 411.8 411.2 410.3 409.5 382.0 380.0
31 283+50 28,010 406.4 3/412.0 412.6 412.0 411.0 410.2 383.8 382.0 32 295+20 29,180 407.1 3/413.2 413.9 413.2 412.1 411.2 385.2 380.0 33 306+20 30,280 407.8 3/414.1 414.9 414.1 413.0 412.0 386.9 385.0 34 317+20 31,380 408.6 3/415.2 416.0 415.3 414.0 413.0 387.1 379.0 35 328+20 32.480 409.4 3/416.9 417.9 417.0 415.5 414.3 387.2 380.7
36 339+35 33,595 410.0 3/417.8 418.8 417.9 416.4 415.0 387.2 381.0 37 349+15 34,575 411.0 3/419.4 420.5 419.5 417.8 416.3 387.3 363.0 38 358+95 35,555 411.5 3/419.9 421.0 420.0 418.3 416.8 389.0 381.0 39 368+95 36,555 412.2 3/421.1 422.3 421.2 419.4 417.8 389.6 376.6 40 378+35 37,495 413.2 3/422.7 423.8 422.8 420.9 419.2 391.0 389.0
41 387+65 38,425 415.1 3/424.7 426.0 424.8 422.9 421.0 394.0 393.0 42 3951-90 39,250 416.6 3/426.5 427.7 426.6 424.6 422.8 396.0 387.0 43 4051-70 40,230 418.1 3/428.3 429.7 428.4 426.4 424.4 396.1 391.0 44 415+25 41,185 418.6 3/428.9 430.2 429.0 426.9 425.0 396.5 387.0 45 424+05 42,065 419.4 3/429.7 431.0 429.8 427.7 425.8 396.6 389.0 46 435+05 43,165 420.7 3/431.6 433.0 431.7 429.4 427.3 397.8 395.8 47 447+80 44,440 421.6 3/432.4 433.8 432.5 430.3 428.2 398.0 380.5 48 457+10 45,370 422.2 3/433.1 434.4 433.2 431.0 428.8 398.0 390.0 49 470+90 46,750 423.2 3/434.2 435.7 434.3 432.0 429.8 400.6 392.6 50 478+70 47,530 423.9 3/435.2 436.7 435.4 433.0 4307 400.8 386.3
51 487+45 48,405 424.5 3/436.4 437.9 436.5 434.0 431. 401.0 392.0 52 496+55 49,315 425.7 3/437.0 438.5 437.1 434.7 432.: 401.1 397.0 53 502+05 49,865 426.4 3/437.7 439.3 437.8 435.4 433.0 402.2 398.0 54 509+30 50,590 427.2 3/438.4 440.0 438.6 436.2 433.8 407.0 399.0 55 518+40 51,500 428.2 3/439.4 440.9 439.5 437.2 434.9 407 .5 393. 5
56 531+00 52,760 429.2 3/440.8 442.2 440.9 438.6 436.2 407.6 399.0 57 5401-60 53720 430.4 3/442.2 443.7 442.4 440.0 437.6 408.1 402.6 58 555+50 55,210 432.2 3/444.2 445.7 444.3 441.8 439.4 408.2 399.2 59 564+60 56,120 433.1 3/445.3 446.9 445.4 442.9 440.4 409.5 404.0 60 572+30 56,890 434.3 3/446.5 448.2 446.7 444.1 441.6 411.0 407. 5
61 582+95 57,955 435.3 3/447.3 449.0 447.4 444.9 442.4 415.3 410.8 Deer Creek -- 58,035 62 596+75 9,335 436.5 3/448.3 449.7 448.2 445.8 443.4 415.5 408.0 63 611+50 60,810 436.3 3/449.5 452.1 449.3 446.2 443.4 415.6 411.6 64 625+25 62,185 437.9 3/450.8 453.2 450.6 447.6 444.8 415.8 407.3 Footnotes at end of table.
29 Table 7.--Revised profile elevations for the South Umpqua River--Continued
Elevation, in feet above mean sea level Station Distance up- stream from 100-year December Report Map mouth flood 1964 500-year 100-year 25-year 10-year Low reference reference-1/ (feet) (adjusted)a' flood flood flood flood flood water Thalweg
65 635+20 63,180 438.7 3/451,5 454.0 451.3 448.4 445.6 415.9 407.0 66 643+55 64,015 439.2 3/451.9 454.3 451.7 448.8 446.0 417.0 409.0 67 651+70 64,830 439.9 3/452.7 455.0 452.5 449.7 446.9 417.4 411.5 68 661+80 65,840 440.9 j453.7 456.0 453.5 450.6 447.9 417.8 412.8 69 6751-90 67,250 442.1 3/454.8 457.0 454.6 451.8 449.0 423.1 421.8
70 683+70 68,030 442.9 3/455.4 457.7 455.2 452.4 449.7 423.8 416.0 71 694+65 69,125 4-43.7 3/456.0 458.1 455.8 453.0 450.4 425.2 422.2 72 703+00 69,960 445.3 3/457_I 459.2 457.0 454.3 451.8 426.0 423.0 73 712+85 70,945 446.9 3/458.1 460.0 458.0 455.5 453.1 426.7 423.2 74 722+95 71,955 449.7 3/461.6 463.5 461.5 458.9 456.4 427.5 425.0
75 136+85 73,345 452.1 3/464.2 466.1 464.1 461.5 458.9 431.0 427.0 76 748+65 74,525 453.4 j465.8 467.7 465.7 463.0 460.4 431.2 424.7 77 759+65 75,625 454.6 3/467.1 469.0 467.0 464.3 461.7 432.5 430.5 78 771+85 76,845 455.2 3/467.6 469.4 467.4 464.8 462.2 433.8 431.3 79 788+75 78,535 456.8 3/468.9 470.8 468.8 466.1 463.5 439.3 437.0
80 801+10 79,770 457.4 3/469.1 471.0 469.0 466.4 463.9 440.6 432.0 81 807+15 80,375 457.8 3/469.4 471.3 469.3 466.7 464.3 440.7 428.0 82, 83 817+50 81,410 459.2 3/471.4 473.1 471.2 468.6 466.1 441.5 428.5 Highway I-S bridge 81,410 ------84 8281-20 82,480 459.5 3/471.9 473.7 471.8 469.2 466.5 441.6 434.0
85 840+10 83,670 460.8 3/473.4 475.1 473.2 470.6 467.9 441.8 436.8 86 850+50 84,710 462.0 3/474.1 476.0 474.0 471.5 468.9 442.0 437.0 87 855+40 85,200 462.6 3/474.6 476.4 474.4 472.0 469.4 443.1 438.0 88 863+70 86,030 463.5 3/475.3 477.0 475.2 472.8 470.3 443.1 437.0 89 876+75 87,335 464.9 3/476.9 478.6 476.8 474.3 471.8 443.2 437.0
90 890+65 88,725 466.4 3/478.6 480.3 478.5 476.0 473.4 443.3 432.6 91 905+60 90,220 467.4 3/479.1 480.9 479.0 476.6 474.1 448.2 446.4 92 915+35 91,195 468.3 3/479.6 481.3 479.5 477.2 474.8 450.5 448.5 93 922+35 91,895 469.0 3/480.1 481.7 480.0 477.7 475.4 450.7 447.5 94 932+75 92,935 470.3 3/481.1 482.6 481.0 478.8 476.6 450.8 446.0
95 943+90 94,050 471.3 3/481.9 483.4 481.8 479.5 477.3 454.8 452.0 96 949+55 94,615 471.6 3/481.9 483.4 481.8 479.6 477.5 454.8 445.0 97 961+85 95,845 472.2 3/482.8 484.2 482.7 480.4 478.2 454.9 448.0 98 980+90' 97,750 473.7 3/484.8 486.3 484.7 482.4 480.1 455.2 439.5 99 995+00 99,160 475.1 3/486.3 487.6 486.2 484.1 481.9 455.3 445.8
100 1011+10 100,770 477.1 3/488.3 489.5 488.2 486.1 483.9 455.3 447.8 101 1020+55 101,715 478.2 3/489.1 490.3 489.0 487.1 484.9 456.8 451.0 102 1030+25 102,685 479.3 3/490.1 491.3 490.0 488.4 486.2 456.8 444.0 103 1048+30 104,490 480.1 3/490.8 492.0 490.7 489.0 487.0 457.0 454.0 104 10591-55 105,615 481.2 3/491.6 492.7 491.5 489.8 487.8 458.1 453.0
105 1067+85 106,445 482.5 3/492.6 493.7 492.5 490.9 489.2 460.8 455.0 106 1077+85 107,445 484.0 /493.6 494.7 493.5 492.0 490.5 461.1 457.0 107 1091+40 108,800 484.5 3/495.9 3/496.6 3/495.5 3/494,0 3/492.5 465.3 458.5 108, 1091096+50 109,310 485.7 3/496.8 3/497.5 3/496.4 3/495.0 3/493.5 465.6 462.5 Gaging station 3120 and Highway 99 bridge 109,430
110 1103+40 110,000 487.3 3/499.5 3/500.4 3/499.4 3/497.2 3/495.2 466.0 463.0 Ill 1111+10 110,770 488.7 3/500.0 3/500.9 3/499.9 3/498.0 3/496.1 466.1 460.0 112 1122+75 111,935 489.8 3/500.5 3/501.4 3/500.4 3/498.8 497.1 466.9 448.5 113 1134+55 113,115 490.5 3/501.0 3/501.9 3/500.9 3/499.2 497.7 467.0 464.0 114 1145+20 114,180 491.7 3/501.8 3/502.8 3/501.8 3/500.2 498.7 467.2 462.0 115 1152+70 114,930 492.3 3/502.6 3/503.5 3/502.5 501.0 499.6 467.4 462.5 116 1162+00 115,860 493.7 3/503.4 3/504.4 3/503.4 502.0 500.5 468.5 461.0 117 1172+00 116,860 494.7 3/504.3 3/505.2 3/504.2 502.9 501.5 470.1 462.0 118 1185+60 118,220 495.6 3/505.4 3/506.4 3/505.4 504.0 502.5 470.4 464.0 119 1196+45 119,305 496.7 3/506.8 3/507.8 3/506.7 505.2 503.6 470.5 464.5 120 1204+70 120,130 497.7 3/508.0 3/509.1 508.0 506.3 504.6 470.7 467.2 121 1216+95 121,355 499.3 3/509.2 3/510.3 509.2 507.6 506.0 473.8 463.5 122 1227+80 122,440 500.0 3/510.1 3/511.1 510.0 508.4 506.7 474.6 472.5 123 1236+80 123,340 501.2 3/511.1 3/512.0 511.0 509.3 507.6 474.9 468.5 124 1246+65 124,325 501.8 3/511.5 3/512.5 511.4 509.7 508.0 475.4 468.5 125 1258+00 125,460 502.9 3/512.9 3/513.9 512.8 511.0 509.3 476.3 466.5 126 1267+20 126,380 504.2 3/513.8 3/514.8 513.7 512.0 510.5 478.5 476.5 127 1274+80 127,140 505.9 /s14.9 3/515.8 514.8 513.3 511.9 479.8 478.3 128 1285+00 128,160 507.6 3/516.8 3/517.6 3/516.8 3/515.5 3/513.9 484.2 480.5 129 1293+00 128,960 508.5 3/517.4 3/518.2 3/517.4 3/516.0 3/514.5 484.5 482.0 Footnotes at end of table.
30 Table 7.--Revised profile elevations for the South Umpgua River--Continued
Station Distance - Elevation, in feet above mean sea level stream from 100-yeas December Report Nap muth flood 1964 500-year 100-year 25-year 10-year Low reference referenceJi (feet) (adiusted)V flood flood flood flood flood water Thaiwee [30 1301+65 129,825 509.4 3/517.9 3/518.7 3/517.9 3/516.5 3/515.0 484.8 480.8 [31 1310+85 130,745 510.4 3/518.5 3/519.2 3/518.4 3/517.0 3/515.6 485.4 481.5 Lookingglass Creek 130,800 ------132 1323+20 131,980 511.4 j5192 3/520.0 /5l9.0 3/517.7 /5l6.3 486.5 481.5 133 1335+95 133,255 512.2 3/520.0 3/521.0 3/519.8 3/518.5 3/517.2 488.8 484.3 134 1346+80 134,340 512.8 3/520.6 3/521.6 3/520.5 3/519.1 3/517.8 489.8 483.8 135 1357+25 135,385 513.4 3/521.4 3/522.4 3/521.2 3/519.8 3/518.5 490.4 489.5 136 1366+90 136,350 514.1 3/5220 3/523.0 3/521.8 3/520.4 j5l9.1 491.5 489.0 137 1378-40 137,500 514.6 3/523.0 523.9 522.6 521.2 519.7 497.5 494.5 138 1386+55 138,315 515.1 j523.8 524.7 523.4 522.0 520.4 498.3 497.0 139 1396+85 139,345 516.0 3/524.6 525.6 524.2 523.0 521.3 499.0 497.5 140 14054-05 140,165 516.8 3/525.6 526.6 525.3 524.0 522.3 499.2 496.0 141 1414+60 141,120 518.4 3/528.1 529.3 527.8 526.2 524.3 499.4 494.5 142 14281-35 142,495 520.8 3/531,8 533.4 531.4 529.5 527.4 500.6 498.4 143 1437+05 143,365 521.5 3/533.0 534.6 532.5 530.4 528.3 500.8 500.0 144 1447+65 144,425 522.2 3/534.2 535.9 533.7 531.4 529.2 501.0 496.0 145 1458+15 144,475 523.0 3/535.0 536.8 534.5 532.2 530.0 501.2 499.5 146 14701-20 146,680 524.4 3/537.3 539.2 536.8 534.2 531.9 501.6 497.5 147 1478+80 147,540 525.4 3/538.9 541.0 538.3 535.5 533.1 503.8 496.5 148 1489+70 148,630 526.7 3/540.3 542.3 539.8 537.1 534.6 504.7 502.0 149 1498+25 149,485 527.4 3/541.2 543.1 540.7 538.0 535.4 505.5 501.0 150 1506+25 150,285 528.1 3/542.0 544.0 541.6 538.9 536.2 505.9 501.0 151 1517+60 151,420 529.6 3/543.8 546.1 543.3 540.4 537.6 510.7 505.0 152 1528+15 152,475 531.1 3/544.8 547.4 544.3 541.3 538.6 510.8 502.0 153 1536+80 153.340 532.8 3/546.5 548.9 545.9 543.0 540.4 513.0 505.0 154 1551+65 154,825 534.8 3/548.3 550.6 547.7 544.8 542.4 515.2 509.0 155 1557+80 155,440 535.0 3/548.4 550.9 548.0 545.0 542.5 515.4 511.5 156 1571+20 156,780 537.2 3/550.7 552.9 550.2 547.3 544.9 515.6 506.5 157 1579+75 157,635 538.6 3/551.4 553.5 550.9 548.0 545.7 516.0 508.0 158 15901-75 158,735 540.2 3/552.4 554.4 552.0 549.4 547.2 516.2 511.7 159 16051-10 160,170 541.2 3/552.8 554.8 552.4 550.0 547.8 520.2 519.0 160 1613+10 160,970 542.0 /553.3 555.1 552.8 550.6 548.4 520.4 517.4 161 1618+60 161,520 542.4 3/553.6 555.4 553.2 551.0 548.8 522.6 516.0 162 1629+85 162,645 543.4 3/554.4 556.1 554.0 551.8 549.7 523.0 518.5 163 1636+25 163,285 543.9 3/554.4 556.1 554.0 552.0 549.9 524.0 522.5 164 1644+40 164,100 544.5 3/555.4 557.0 555.0 552.8 550.7 524.3 517.0 165 1654+25 165,085 545.5 3/556.8 558.6 556.4 554.1 551.9 524.4 522.0 166, 1671661+85 165,845 546.7 3/558.2 560.0 557.8 555.4 553.1 524.9 523.0 Nary Moore Bridge 165,845 168 1667+80 166,440 547.8 3/559.6 561.6 559.2 556.7 554.4 527.6 525.0 169 1677+15 167,375 548.7 3/560.5 562.4 560.0 557.5 555.2 528.0 527.0 170 1691+75 168,835 550.0 3/562.0 564.0 561.6 559.0 556.7 531.7 530.7 171 1703+65 170,025 550.9 3/562.6 564.6 562.1 559.6 557.4 533.6 528.5 172 1720-1-55 171,715 552.4 3/563.7 565.6 563.2 560.8 558.7 536.8 516.0 173 1736+40 173,300 553.9 3/564.9 566.7 564.4 562.2 560.1 537.0 531.0 174 1-750+80 174,740 555.5 3/566.5 568.1 566.1 563.9 561.9 537.2 534.7 175 1764+65 176,125 556.5 3/567.8 569.4 567.4 565.1 563.0 537.5 536.0 176 1780+45 177,70-5 557.6 3/569.1 570.8 568.7 566.3 564.1 537.8 529.0 177 1785+65 178,225 558.6 3/570.1 571.8 569.7 567.2 565.0 537.9 530.0 178 1793+05 178,965 560.5 3/572.9 575.0 572.4 569.7 567.3 540.2 539.0 179 1811+50 180,810 562.5 3/575.2 577.4 574.7 571.9 569.5 540.4 535.6 180 1824+80 182,140 563.8 3/576.4 578.5 575.9 573.2 570.8 540.6 538.4 181 18301-80 182,740 564.6 3/577.3 579.3 576.9 574.2 571.8 540.7 539.5 182 1846+35 184,295 566.1 3/579.2 581.2 578.7 576.1 573.6 541.0 537. 5 183 1858+60 185,520 567.3 3/581.0 583.2 580.5 577.6 575.0 541.8 534.0 184 1867+00 L86,360 568.5 3/582.4 584.7 581.9 579.0 576.3 543.0 526.0 185 1879+25 187,585 570.2 3/584.5 586.8 583.9 580.9 578.2 543.1 537.0 186 1885+55 188,215 571.0 3/585.5 587.9 585.0 581.9 579.1 546.3 541.0 187 1894+80 189,140 572.0 3/586.6 589.0 586.0 582.9 580.1 549.5 546.5 188 1905+95 190,255 573.5 3/588.0 590.4 587.4 584.2 581.5 550.8 548.5 189 1920+50 191,710 575.2 3/590.0 592.7 589.4 586.1 583.2 552.2 549.0 190 1932+80 192,940 577.0 3/592.2 594.9 591.5 588.1 585.2 554.6 538.5 191 1946+60 194,320 579.6 3/594,1 596.6 593.5 590.4 587.8 555.1 549.0 192 1958+00 195,460 581.9 3/596.4 598.8 595.8 592.7 590.2 555.2 552.0 193 1968+90 196,550 583.8 3/598.5 601.0 597.9 594.6 591.9 556.9 555.0
Footnotes at end of table.
31 Table 7.--Revised proeile e1.evatiois for the SouththupquaRiver--Continued
Station Distance up- Elevation, in feet above mean sea level stream from 100-year December Report Map mouth flood 1964 500-year 100-year 25-year 10-year Low referencereferenceJ (feet) (adjusted)J flood flood flood flood flood water Thaiweg
194 1981+65 197,825 585.2 3/600.4 602.9 599.6 596.3 593.5 559. 5 552.5 195 1993+45 199,005 585.5 3/600.6 603.2 600.0 596.6 593.8 565.7 556.5 196 2002+25 199,885 586.2 3/601.1 603.7 600.5 597.1 594.1 570.2 555.0 197 2012+20 200,880 587.0 3/602.0 604.5 601.4 598.0 595.2 570.4 566. 5 198 2026+80 202,340 591.8 3/606.1 608.8 605.4 602.0 599.3 571.3 568.5
199 2035+55 203,215 594.2 3/607.2 611.2 607.9 604.4 601.7 573.0 572.0 Myrtle Creek 203,265 200 2047+45 204,405 597.0 3/608.9 613.7 610.4 607.1 604.6 574.4 571.0 201 2062+60 205,920 599.4 3/612.6 616.3 613.1 609.9 607.2 578.2 564.0 202 2086+65 208,325 601.7 3/615.0 618.9 615.5 612.1 609.3 579.5 577.5
203 2102+35 209,895 603.0 3/615.5 619.2 616.0 612.6 610.0 579.7 576.5 204 2114+70 211,130 604.2 3/616.5 620.1 617.0 613.9 611.5 579.9 577. 5 205 2126+80 212,340 605.0 3/617.5 621.0 618.0 615.0 612. 5 581. 5 579.0 206 2139+85 213,645 605.9 3/619.0 622.5 619.5 616.3 613.7 582.5 580,5 207 2153+15 214,975 607.0 3/620.0 623.1 620.4 617.6 615.1 582.6 578.0
208 2166+10 216,270 608.1 3/620.8 623.7 621.2 618.8 616.5 582.6 579.5 209 2179+05 217,565 609.4 3/621.8 624.4 622.1 620.0 617.9 583.3 582.0 210 2189+20 218,580 610.2 3/622.7 625.2 623.0 620.9 618.8 583.5 582.5 211 2204+55 220,115 611.5 3/624.2 626.5 624.5 622.6 620.5 5?9.3 586.5 212 2211+70 220,830 612.3 3/624.9 627.4 625.3 623.3 621.2 589.3 588.5
213 2224+85 222,145 613.1 3/625.6 628.2 626.2 624.0 622.0 589.8 582.0 214 22401-20 223,680 614.5 3/627.6 630.2 628.3 625.9 623.8 590.2 586.0 215 2254+80 225,140 615.9 3/629.2 631.8 629.9 627.5 625.1 592.5 591.0 216 2272+55 226,915 617.4 3/631.1 633.9 631.9 629.4 626.7 594.5 590.5 217 2282+75 227,935 618.2 3/631.8 634.8 632.7 630.2 627.5 596.0 593.0
218 2294+45 229,105 619.8 3/633.5 636.9 634.8 632.0 629.2 600.0 598.5 219 2303+20 229,980 620.7 634.1 637,8 635.6 632.8 629.9 600.2 596.0 220 2312+05 230,865 622.2 635.1 638.8 636.8 634.2 631.2 601.0 597. 5 Pruner Bridge 230,965 221 2329+65 232,625 624.4 637.3 640.5 638.6 635.9 632.8 603.8 601.5
222 2341+50 233,810 625.7 638.2 641.5 639.6 636.9 633.9 607.0 604.5 223 2349+90 234,650 627.3 639,6 643.3 641.1 638.3 635.3 607.5 601.5 224 2363+15 235,975 630.2 641.8 645.5 643.4 640.6 637.8 610.7 603.5 225 2380+25 237,685 634.5 644.2 647.8 645.6 643.1 640.7 619.6 614.5 226 23901-15 238,675 637.0 647.1 651.4 648.7 645.8 643.4 620.2 613.0
227 2402+80 239,940 639.6 648.8 652.9 650.4 647,8 645.6 621.1 618.5 228 2411+45 240,805 641.0 650.0 654.0 651.4 649.0 647.0 621.2 619.0 229 2417+45 241,405 641.7 650.6 654.6 652.0 649.6 647.7 622.0 620.0 230 2422+55 241,915 642.0 651.0 655.0 652.4 650.0 648.0 622.5 618.5 231 24354-65 243,225 642.9 652.0 656.0 653.4 651.0 649.0 625.4 621.5
232 2445+25 244,185 643.6 652.7 656.7 654.1 651.7 649.6 626.6 623.5 233 2461+15 245,775 645.4 654.5 658.3 655.9 653.5 651.4 627.6 621.5 Cow Creek 245,830 234 2469+15 246,575 646.4 655.4 659.2 656.8 654.4 652.3 634.1 632.0 235 2480+10 247,670 648.0 657.3 661.8 - 658.8 656.1 654.0 634.2 630.0
236 24904-10 248,670 649.1 658.1 662.7 659.6 656.8 654.7 635.6 634.0 237 2498+10 249,470 651.1 660.8 665.4 662.2 659.4 657.2 637.7 636.0 238 2505+15 250,175 652.3 662.5 667.2 664.0 661.0 658.7 637.8 631.0 239 2520+75 251,735 654.2 664.0 668.7 665.4 662.5 660.2 640.5 636.0 240 2530+15 252,675 655.5 665.6 670.7 667.2 664.0 661.7 642.2 636.0
241 2542+70 253,930 657.2 666.7 671.7 668.2 665.1 662.8 649.1 648.0 242 2561+75 255,835 660.7 669.8 674.4 671.3 668.3 666.0 649.2 643.0 243 2575+80 257,240 664.9 675.9 679.8 677.2 674.2 671.7 649.4 640.5 244 2588+75 258,535 668.4 679.7 684.2 681.0 678.1 675.9 650.2 649.0 245 2601+05 259,765 670.9 682.2 686.8 683.6 680.8 678.6 651:2 644.0
246 2612+85 260,945 673.7 684.7 689.4 686.1 683.3 680.9 658.9 658.0 247 2621+20 261,780 675.3 685.8 690.6 687.3 684.3 681.9 660.8 659.5 248 2633+50 263,010 677.6 687.4 692.2 688.8 685.8 683.6 666.6 658.5 249 2643+00 263,960 679.0 689.0 694.2 690.6 687.4 685.2 666.8 661.0 250 2653+75 265,035 681.6 690.9 695.4 692.1 689.6 687.7 667.0 664.5
251 2658+90 265,550 682.7 692.1 696.3 693.3 691.0 689.1 668.0 665.0 252 2666+90 266,350 684.4 693.5 697.4 694.6 692.4 690.6 670.8 669.0 Canyon Creek 266,550 253 2671+60 266,820 685.4 694.0 697.8 695.7 693.0 691.3 672.0 670.5 254 2679+10 267,570 687.1 696.1 699.8 69 7.2 695.0 693.2 672.1 669.5 255 2699+10 269,570 691.2 700.8 704.6 701.9 699.4 697.4 679.6 678.0
Footnotes at end of table. 32 Table 7. --Revised profile elevations for the South Umpqua River--Continued
Station Distance - Elevationinfeet abovemean sea level stream from lOO-year December Report Map mouth flood 1964 500-year 100-year 25-year 10-year Low reference referenceL' (feet) (adjusted)L/ flood flood flood flood flood water Thalweg 256 2703+40 270,000 692.0 701.4 705.4 702.6 700.0 697.8 679.8 676.5 257 27201-70 271,730 697.3 704.4 708.5 705.6 703.2 702.0 681.2 679.0 258 2728+45 272,505 698.0 705.2 709.2 706.4 704.0 702.6 685.5 684.0 259 2744+30 274,090 699.4 707.0 710.9 708.1 705.8 704.3 685.6 683.0 260 2766+35 276,295 701.7 710.3 714.0 711.4 709.0 707.2 685.8 684.0 261 27751-95 277,255 703.3 712.7 716.0 713.6 711.3 709.6 686.7 684.5 262 2786+90 278,350 705.4 715.6 719.2 716.7 714.2 712.2 690.7 688.5 263 2801+45 279,805 708.6 717.1 720.8 718.3 716.0 714.0 699.7 699.0 264 2813+10 280,970 711.8 718.7 722.2 719.8 717.5 715.8 701.5 700.0 265 2825+95 282,255 714.0 721.3 724.6 722.3 720.2 718.5 702.2 700.0 266 28401-30 283,690 716.2 725.0 728.3 726.0 723.6 721.5 702.3 700.5 267 2849+45 284,605 717.7 726.6 730.3 727.6 725.2 723.2 703.0 701.5 268 2858+85 285,545 721.2 730.7 734.1 731.8 729.2 727.0 704.8 703.0
1/ Identification number on photogrammetric slap. 2/ Adjusted for storage in proposed Days Creek Lake. 3/ Profile revised April 1973.
33 Table 8.--Revised profile elevations for the North IJmpqua River. mouth to Winchester DaisY
Elevation, in feet above mean sea level Station Distance up- stream from Dec ember Cross Map mouth 1964 500-year 100-year 25-year [0-year Low ThalwegV section referenceí (feet> flood flood flood flood flood water
1 4+00 100 400.6 404.7 401.5 398.3 395.3 363.4 360.4 2 18+35 1,535 401.5 405.5 402.1 398.8 395.6 363.8 360.0 3 29+45 2,645 402.5 406.2 402.7 399.3 395.8 364.2 359.0 4 42+05 3,905 403.3 406.9 403.5 399.8 396.0 366.8 361.0 5 57+25 5,425 404.5 407.8 404.4 400.4 396.4 367.2 363.0
6 63+65 6,065 405.0 408.2 404.7 400.7 396.6 375.2 370.5 7 77+90 7,490 406.0 409.0 405.5 401.2 396.8 375.3 370.2 8 89+85 8,685 406.8 409.7 406.1 401.7 397.2 375.4 369.0 Caging statio,n 3195 9,250 407.2 410.0 406.5 402.0 397.5 375.4 -- '9, 10 99+50 9,650 408.3 411.2 407.7 403.0 398.2 375.4 367.4
Brown's Bridge -- 9,650 11 105+00 10,200 409.7 412.8 409.0 404.1 399.2 375.4 366.0 12 113+45 11,045 410.5 414.0 409.9 405.0 400.0 375.5 363.3 13 124+05 12,105 412.3 415.6 411.7 406.8 402.2 380.3 375.5 14 135+95 13,295 413.7 416.9 413.0 408.5 404.6 382.4 373.0
15 159+30 15,630 416.3 419.9 415.6 411.1 407.4 389.0 376.0 16 170+35 16,735 417.9 421.6 417.2 412.6 409.1 389.7 382.2 17 1794-40 17,640 419.9 423.5 419.2 414.8 411.5 390.3 384.8 18 188+85 18,585 421.8 425.4 421.1 416.7 413.3 392.2 386.2 19 203+35 20,035 423.7 427.1 423.0 418.6 415.4 394.3 383.3
20 212+50 20,950 425.2 428.8 424.4 420.0 416.6 394.8 384.0 21 222+60 21,960 426.7 430.6 425.9 421.3 417.8 397.2 391.7 22 232+75 22,975 428.0 432.1 427.2 422.5 419.1 397.8 394.0 23 242+75 23,975 430.8 435.0 429.9 425.1 421.7 403.2 397.7 24 251+05 24,805 432.0 436.0 431.2 426.6 423.4 405.1 400.0
Sutherlin Creek -- 24,900 25 264+35 26,135 433.6 437.4 432.9 428.7 425.7 405.7 399.0 26 276+30 27,330 435.3 438.9 434.5 430.3 427.3 406.6 401.5 27 286+75 28,375 436.3 439.9 435.6 431.5 428.5 407.7 401.2 28 298+65 29,565 438.3 442.2 437.6 432.9 429.9 408.1 400.0
29 307+15 30,415 438.3 442.2 437.6 433.7 430.5 408.7 403.7 30 322+00 31,900 439.9 444.3 439.2 435.3 432.3 411.6 407.0 31 333+80 33,080 442.4 444.8 441.6 437.3 434.2 413.9 406.4 32 3454-30 34,230 445.7 449.2 444.9 440.3 437.1 417.1 409.0 33 353+95 35,095 447.4 450.7 446.7 442.3 439.1 419.5 413.5
Southern Pacific Railroad bridge -- 35,250 Highway 1-5 bridge 35,680 Highway 99 bridge 35,780
34 3651-20 36,220 448.3 451.6 447.6 443.5 440.4 421.5 416.5 Winchester Dam 36,460
1/ Supersedes table 8 in Part 1, 1972, because of new frequency analysis. 2/ Identification number on photograimsetric map. 3/ Thalweg, low point in channel.
34 W Cnek - 500-year100-year flOOd flood 964 flood EXPLAN4 TION3r95 r Go2in Cross sections stoflon \__// Thweg - Low25-yearomrted wafer flood 0-year flood o SCALE, IN FEET End ot profile Shown000 2010 SCOTTS8URG /W. /A ® ® I eo: 20 4-- pc ISTANCE UPSTREAM FROM SCOTTSBURG BR DGE, N FEET 2,000 4,000 6,000 2000 4000 F GURE 7. - - Profi es of Umpqua R ver *ornee/y &eek \ ® Creed ® 60 0 40 21 500-year100-year964 flood flood flood EXPLA NATION Cross scfons 20 25-yearTOolwegLow 0-yearfloodwater flood __0,20?0w--O End of Erolile shown SCALE, IN FtET 28,000 30,000 32,000 34,000 8,000 20,000 22,000 DSTAN CE UPSTREAM FIGURE 8.- -P rofiles of UmpquaFROM SCOTTSBURG River BRDGE, N FEET 80 -r - 60 rr' r-.- 500-year100-year flood964 flood flood EXPLA NATION W Cross sectons 40 - 25-yearThoiwegLow0-year waterflood flood o..o rrd o profile SFrOwfl SCALE IN FEET CDO 20?O 20 ___ 38,000 D STANCE UPSTREAM40,000 FROM SCOTTSBURG BR DGE, N FEET 42,000 48,000 50,000 I0 34,000 36,000 F GURE 9 - - Prof es of Umpqua R ver ar"ii .ø - -. - - 100-year flood 500-year19S4 flood E)PLANATt0N Cross Oecti005 - - - - Loo water - - 25-year flood Thalweg0-year flood 0 a--o End of profIle sf.own SCALE, IN FEET 000 2000 100 LU>-JuJ (jJ LU 80 LU - LUH 60 - - - - - zU- T _ - 9 I 0 - - LU>-J 40 /. - - _____ -_____ - -_____ 44 I 64,000 66,000 68,00 ANCE UPSTREAM FROM SCOTTSBURG BR DGE, N FEET 2 52,000 54,000 56,000 DI F GURE 0-- Profi es of Ump qua R ver - -.------. 964 flood - - 100-ynor flood 50Oyeor flood EXPLANATION o---o End of profIle shown Cross saclons - - - Low wolOr- - 25-poOr flood Tfloweç0-year flood 0 SCALE, IN FEET 000 1 I 2000 00 = -. - 80 ------© i 64 - - - - 60 4 4 D STANCE UPSTREAM FROM - - - - SCOTTSBURG BR DGE, N FEET 78,0 - - 00 - - 80 ,000 - - - - 82,000 I 444 I L ver -_- - 9, F GURE --Prof es of Umpqua R ii 84,000 68,000 70,000 72,000 -_- 0 100 0 SI 0 - - - - 00-year flood 500.yeor flood flood EXPLANATION Cross sections 4 4 - - - - Lao odler - - 25-year flood TrlarqlO-yrOr964 flood e--o End of profile shown SCALE, !N FEET Go0 20f0 60 90,000 92,000 94,000 96,000 98,000 00,000 02,000 86,000 88,000 D STANCE UPSTREAM FROM SCOTTSBURG BR DGE, N FEET F GURE 12.-- Profiles of Umpqua River _0UOQ - ELKTO 0 uJ>w-J wz(/)-J - - - w 00 - - - - - I - - aD - - - I-uJ I zLLI-u - 80 4 - 4 II 4 z ------08,000 - - - 0,000- - - 2,000 - - DI lANCE UPSTREAM/ FROM SCOTTSBURG BR DOE, N FEETF GURE 13.- -Profiles of Umpqua River I o 20 I ___ -.-. _._._._._._._._._.---L::- 00 ------500 -yeaf 0 EXPLAUAflONflood 2i Onos sec?lons 0 o - - - - 00-year -- - 25-year- - -.flood 964 foo 0-year flood ? -_ SCALE, N FEET End of profile shownco 20?O - 80 - - - 6 20,000 22,000 24,000 26,000 28,000 30, 4,000 U D STANCE UPSTREAM FROM F GURE 14.-- Profiles of Umpquc River SCOTTSBURG BR DGE, N FEET 500-year96400-year flood flood flood EXPLA NATION Cross sections 40 25-yearThalwegLow10-year waterflood flood I it 7I I2 34,000 136,000 138,000 40,000 42,000 I 44,000 146,000 60 , 30,000 132,000 D STANCE UPSTREAM FROM S F GURE 15--Profiles of COTTSBURGUmpquo Rive r BR DGE, IN FEET 140 120 500-year100-year flood964 flood flood EXPLANATION 3I95 (_) Cross sections Gaging station 00 25-yearThaiwegLow flood0-year water hood n--n End of profile shown 58,000 60000 DSTANCE F rofiles ofFROM SCOTTSBURG BRDGE, N FEET Umpquo River 100$ Cree* -. - - - 100-year flood 500-year1964 flood EXPLANATION Cross sections 80 ------25-year- Low water flood ThaIwegJO-year flood ? SCALE, IN FEET End of pmAle slSown10(0 29)0 01 60 40 20 100 64,000 66,000 68,000 DSTANCE 70,000 FGURE 7--Profies ofUPSTREAM Umpqua Rver FR 172,000 OM SCOTTSBURG BRDGE 74,000 NI76,000 FEET 178,000 EXPLANATION - - - - 00-year flood 500-year flood964 flood Croos sectoes oflle shows - - - 25-year flood - - - Low water Tha?we0-year flood o.o En4 of SCALE, IN1 FEET 000 1 20
82,000 84,000 86,000 88,000 90,000 92,000 94,000 96,000 98,000 D STANCE UPSTREAM F GURE i a- - p rofiles of UmpquFROM SCOTTS aBURG River BR DGE, N FEET -. - - - 00-year flood 500year flood964 flOod EXPLANATfON C,oss sccfior,s - - - - LOW wafer - - 25-year flood l0yCarTIoIweç flood o----o fled of profIle sf,own SCALE, IN FEET 000 20?0 200 80 60 0 + 0 0 0 C C 0 40 DISTANCE204,000 FGURE 9--Profies of UPSTREAMUmpqua Rver FROM SCOTTSBURG BR OGE, N FEET 206,000 / 208,000 2 0,000 20 98,000 200,000 'V 202,000 / 500-year. flood EXPLA NATION 25-year 96400-yearflood flood flood EndCross of seclions profile r?ow n 220 KeI4ogBrld,e ThalwegLow water0-year flood 9 --o SCALE, IN FEET KOj2O?O 80 - 60 0 0 0 0 0 DSTANCE UPSTREAMF 222,0c50 ROM SCOTTSB 224,000 URG BRIDGE, N FEET 226,000 228,000 230,000 232,000 40 216,000 218,000 220,000 FGURE 2Q--Profies of Umpquo Rver 'ii JwJ 220 wz(1) 200 ! *! L.L...I- 180 500-year1964100-year flood flood EXPLA NATION () Cross sections -uJQzZ 25-yearThaiwegLow10-year waterflood Iood ---o End 01 profIle shown SCALE, IN FEET COO 29)0 Jw 160 232,00 234,000 236,000 238,000 240,000 242,000 244 000 246,000 248,000 -- D STANCE UPSTREAM FROM SCOTTSBURG BR DGE, N FEET F GURE 2 - - Profi es of Umpqua R ver -U 1964lOO-yeor floodCO-year flood flood EXPLA Crosc sector$ 240 25-yearThalwegLow10-year waterflood flood 0 o.o End & profile 5(A E, IN FEET 000 20 f1own - - - 200 ------4 + 4 4 4 80 258,000 260,000 262,00 264,000 266,000 250,000 252,000 254,000 DSTANCE UPSTREAM FROM SCOTTSBURG BRDGE, N FEET F GURE256,000 22 - Profiles of Umpqua River !LitI Cw'yr Boliw Br - - -. - 100-year0 flood 500_year1964 flood EXPLANATIONflood Cross eCI,orrs - - - Low wotr- - 5-yeor flood- Tholweg 0-year flood 0 o.o End of profile shown SCALE, IN FEET COO 29)0 -J 260 k 0 0 Ui-J>I-uLu V.'. 01 UiLUz 240 U-UIUiF- 220 4 4 0 4 z 200 0 0 180 270 00.: DISTANCE272,000 UPST REAM FROM 274,000 S COTTSBURG 276,000 BRDGE, IN FEET I 278,000 280,000 282,000 266,000 268,000 ii FGURE I 23--Profes of Umpqua Rve r Lost Ce'eefr - - 00-year flood 5r0.yearI%4 flood flood EXPLANATION Cross sections - -- - 25-yearLow10-year TEolereSfloodwoler flood 0 o--o End of profile Spawn SCALE, 01 FEET lOGO I 20?O u-i I ci)u-iJ 260 u-i4zuJ 240 ilUWi wu-i40> ------zU- 220 I 4 4 4 >U-i0z uJ 200 2 90,000 292,000 294,000 296,000 298,000 300,000 U. 284,000 286,000 288, OOC DSTANCE Fl GUREUPSTRE4M 24--Profiles FROM of Umpqu SCOTTS aBURG River BRIDGE, N FEET ____?05iiF Crass sect ens Lii-J ____ ci)Lii-J 280 ______0zLii> 260 ------L--___------I-Lii 0zU-Liiz 240 4 - - _____ - - - - 4o UJw>-J 220 _ 306,000 312,000 316,000 300 000 302,000 304,000 DISTANCE UPST FGURE 25-- Profiles of Umpqua Rive MOTTG BR DGE, IN FEET ------IOO-yer fiood 5OOyeor fIo EXPLAN#TION Cross sections - - - -25-yeor Low water flood ThaiwegIO-eo964 lood flood w----o End of protHe shown SCALE, IN FEET 000 20?0 uJ-JLJJ-J> (J Z 4(I-)LU 40>uJ 0zU-LUF-z LU-J> ,000 326,000 328,000 332,000 334,000 3 8,000 320,000 322, OOC D STANCE UPSTREAM FROM F GURE 26 - Profiles of SCOTTSBURG UmpBR DGE,qua River N FEET - - - - IOU-year flood 500-year flood954 flood EXPLANATION Cross SOCti000 - - - - Low eater - - 25-year flood Tholweg10-year flood SCALE, IN FEET o End of pfoti!e shown )Oi2O?o LU-J Cr)LU-J> ()Z LU zco I-LU0> 0zCL 280 -JLU> 260 38,000 340,000 336,O00 ...___-3 DSTANCE UPSTREAM FROM F GURE342,000 27-- Profi es of Ump qua R ver 344,000 SCOTTSBURG BRIDGE, N FEET 346,000 348,000 350,000 352,000 )1MM\W // 4 EEEL j0fQo yeQ' flQQ 'iN:E C'° tjJ-Jw> 340 UJ 320 300 ------I 280 354,000 356,000 358 000 0 STANCE UPSTREAM FROM SCOTTSBURG BRIDGE, N FEET 360 000 362 000 364 000 366,000 \ 368,000 370,000 372,000 III- - - . F GURE 28--ProfI_ es of Umpquo R ver ---5--i',II / WINCI-4ESTER 490------tOO_yeor ffSOO 500-yearg64 f rood I100d E X FL AN ATf ON Cross sectoos 480 - - 25-year Food CO-year Food 0 I a.o End of profile Shown lOGO I 20p0 460 0 ___:U SCALE IN FEET / ------. 440 -- 420 0 2000 4000 6000 8000 0,000 t 2,000 4,000 16P00 DSTANCE F IGURE 29.-UPSTREAM - Profiles of FROM WINCHESTERNorth Umpqua DAM, NRiver FEET EXPLANATION ------25-year IOOyeor- 964 flood flood flood 5OO-yer tIooO -o End of OrofiJ Cross oeCtor's shown 520 - - - - Low wOfer TfaIwe0-year flood SCALE, IN FEET 1)00 20?O 0' 500 /cIL - 480 . 4 - -__ 460 4 4 8,000 'W' 22,000 DSTANCE UPSTREAM24,000 FROM WINCHESTER DAM, N FEET 26 000 28 000 30 000 32 000 34 000 P".. F IGURE 30--P rofiles of North Umpqua River - - - - - 00-year flood 500-year964 ftaod tood EXPLANATION Cross seCtows - - - - Low water - - 25-year flood Ttrotweq0-year flood °-.--- Erd of DeoIiIe showrr SCALE IN EEET 00090
01 40,000 42,000 46,000 34,000 36,000 DSTANCE UPSTREAM FROM F GURE 31.-- Profiles of WINCHESTERNorth Umpqua 44 000 DAM, IN FEETRiver 48 000 50 000 I' -J ® ® 1964 and 00 year flood combined (I)uJ-Jw 580 0LUw> 560 4 4 4 4 uJLLI- .. z - 54C >tJ0z shown LU-J 54,000 56,000 58,000 60,000 62,000 64,000 yrfd 0 66,000SCALE,I IN FEET 1000 I 2000 I I 52,000 D STANCE Fl UPSTREAM rofiles of NorthFROM Umpqua WINCHESTER River DAM, IN FEET - - - - 'L1964 flood 1l00_yeoe flood5CC-year flood EXPLANATION Cross sections - - - - Low water - - 25-year flood Teal WC90-year flood o. - End of profile shown SCAII, IN FEET pO12O0 -J U)uJIii-J 620 0>zLU 600 zUiI- 580 ...... :.. 4 4 UJ-J>LU0 ¶ ¶' - 560 70,000 72,000 ...... 74,000 76,000 78,000 80,000 82,000 84,000 _ppp-__ DSTANCE UPSTREAM FROM WINCHESTER DAM, N FEET _ _ F GURE 33 - Profiles of North Umpqua River 68,000 ______11 - Ii S o 0 0 0 - o ® ®® -J 660 ® Cross sections ______uJ _____(0d 25_yecrLowlOyeor floodflood o.---o End of profile stown I I uJ>zcr j 640 SCALE, nj FEET -- 4 4 wI-LiJ0 ----T-.-;::-- zLi 620 T------T T 0 ------0 4 - _ 88,000 :- 90,000 94,000 A 02, CX ------p86,000 DSTANCE FROM WINCHESTER DAM, N FEET 96,000 98,000 00,000 F IGURE 34--P rofiles of North Umpqua River 700 >LU-J 5C0 eo flood Cross LU-J - - - 25-year- - - Tholwegl0-yeor oo?er floodflood 0 n--o End of profile shown 1000 2000 ______-- ...... LU 680 - - - - Low SCALE, IN FEET ,' LU ...... 0> - .... - - I 0 -- - LUI- 660 ...... zLU.U- A 1; 0 LU-J 640 OU 4 40 106,000 08,000 0,000 II 2,000 114,000 116,000 118,000 auu D STANCE F IGURE 35-UPSTREAM -P - rofiles- of NorthFROM Umpqua WINCHESTER River DAM, N FEET \19641-lO0-year flood flood500-year flood EXPLANAT ON () Cross secf ons _JLU 720 - - - -25-year Low water flood Tholweg10-year flood SCALE, S4 FEET 000 2OO zLJc-nLU 00Lii 700 I-LU zU-0z - 68C JLU> 20,000 22000 24,000 DSTANCE UPSTREAM FROM WINCHESTER DAM, N FEET F GURE, 36 - Profiles26,0(X) of North Umpqua River 28,000 30,000 32,000 I3 000 36, 000 0 0 ,-IOO-yeor500-yeorI964 flood EXPLANATIONflood Cross secIors LJ-J 760 - - - - 25-yecr flood - Thwe o.o End of profile Shw SCALEJN FEET 2000 uJ-J> 740 >uJw U-uJF-0 720 0z 700 -- Ui-J 32,000 -- 44 ----- 4 136,000 - 38,000 40,000 42000'4' AR 44,000 DSTANCE UPSTREAM FROM WINCHESTER DAM, N FEET F GURE 37--Profiles of North Umpqua River A Left bank R.gh? bank 90Left bank Rgb OOnb 480 4 48
460 460 4
440 440 44
420CROSS SECTION 420CROSS SECTION 2 CROSS SECTION
500 500 50 n80 480 48
460 46U 46
440 44Li 44
42 420CROSS SECTION 420CROSS SECTION 5 CROSS SECTION
50 50U 500 0 / (I 480 480 480
460 460 460 -7r 44a 4110 440
42Oo SECTION SECTION 8 420CROSs SECTION 9
50 50 520 \ 48 48
46 46 48
44 44 16
20 440 420ROSSSECTION 10 CROSS SECTION 11 CROSS SECTION 12
520 54U
500 52
EXPLANATION 48C' 500 500-year flood 100-year f load -964 flood 460 480 25-year flood 10-year flood Low wafer
44U 460 0 8
HORIZONTAL SCALE, IN FEET 4 U 20CROSSSECTION 13 CROSS SECTION H
FIGURE 38--North Umpqua River cross-sections
66 Left Rightbard Left bank Rightbonk Leftbark Rightbank 5 52 520
50 500 500
480 480 483
46 4611 460
0 3 CROSSSECTION 15 CROSSSECTION 16 CROSS SECTION 17
520 52 520
500 50U 50ci
480 48 480 460 460 ii 60 44 0 0 J CROSSSECTION 19 4CROSS SECTION 19 CROSSSECTION 20 >w uJ _J 540 54 504 w (I_) 20 52 520 w 500 50 500 uJ - m 80 48 480 w 460CROSS SECTION 21 CROSSSECTION 22 60CROSS SECTION 23 z z 54 54 54
52 52 520 uJ 500 50 500
48 48 80 CROSSSECTION 26
4 CROSS SECTION 24 SECTION 25
54 540 EXPLANATION 500-year flood 52 520 ---.-.-.-.- 100-year flood 1964flood 25-year flood 50 500 10-year flood Lowwater
48 480 800 I60 I HORIZONTAL SCALE, IN FEET
4 460 SECTION CROSSSECTION 28
FIGURE 39--North Umpqua River cross-sections
67 Right bank Right bank 0LetI honk Right bank Left bank 540Lgtt bank 54 54
520 520 520
500 500 500
480 480 31 CROSSSECTION 29 480CROSS SECTION
460CROSS SECTION 30
560 560 56
54U 540 54
20 520 520 5
500 500 500
80 48 480 SECTION 34 CROSSSECTION 32 CROSS SECTION 33 0CROSS
56 560
54 54 540
520 52 520
5 50 500
80 480CRQS SECTION 35 CROSSSECTION 36 CROSSSECTION 37
58 58 58 I
56 56 56
54 54 54 7,
52 52 52
00 CROSSSECTION 38 CROSSSECTION 39 500CROSSSECTION 40
58 58 \ 56 56U EXPLANATION \ 500-yearflood 100-year flood 54 54 1964 flood 25year flood 10-year flood 52 520 Low water
0 800 O0 00 CROSSSECTION 41 CROSSSECTION 42 HORIZONTAL SCALE, IN FEET
FIGURE 40--North Umpqua River cross-sections
68 Rfçht bank Fghl bcetk Left brnk 5 580
560 560
54 540
52 520
50 CROSSSECTION 43 500CROSSSECTION 44
580 58
560 56
540 / 54
52 2 0 CROSSSECTION 46
-J 500CR05S SECTION 45 >LU 58 580 580
LU 60 60 z 56 uJ 54 54U 540 LU
20 20 52CRQSSSECTION 4? CROSSSECTION 49
500 CROSSSECTION 48 z 620 z 620 C 600 600 I 580 / 580 El 560 560 / 54 540 0CROSSSECTION 50
52U CROSSSECTION 51
60
58 EXPLANATION 500-year flood 00-year flood 56 1964 flood - 25-year flood 10-year flood 54 Low water
0 800 90 2 CROSSSECTION 52 HORIZONTAL SCALE IN FEET
FIGURE 41 --North Umpqua River cross-Sections
69 03LOfl biik Rçh! nk Let? ban Rht bank 6 60
5 I 80 580 --- 560 / 560 yr 540 54 CROSS SECTION 5'!
520CROSS SECTION 53
62 6 62
60 60 60
58 58 58 -
56 / 56 56
CROSS SECTION 55 CROSS SECTION 56 CROSS SECTION 5?
620 6211 620
Cc,nOIrod wdh 00 flood 600 Combined with 00 yew 600 Combined with 00yearHood 600
580 500 580
56 560
540 CROSS SECTION 58 CROSS SECTION 59 540CROSS SECTION 60
64 64 640
620 620 6211
Cornbned wh 100 yecr hOod. Ccnnbl,ed wh 00 yoticod, Ccarflodd
60 C00 600
58 58a 58
560 560CROSS SECTION 61 CROSS SECTION 62 CROSS SECTION 63
66 66
6'!0 64 Coiddnd wdh 00 ye thood
C20 6 EXPLANATION 500-year flood -. -- -.-. - - 00-year flood GO 6 - -- 1964 flood 25-year flood 10-year flood 58 58 Low water
0 800 600 I I CROSS SECTION 64 60CRUSS SECTION 85 HORIZONTOL SCALE, IN FEET
FIGURE 42--North Umpqua River cross-sections
70 640Left bank Rgh1 bik Left bank Right bank bai Right bank 64
620 620 620
600 600 608
580 7 58 580
560 56 5 CROSS SECTION 66 0CROSS SECTION 6? 60CROSSSECTION 68
660 660 660
640 640 640
620 620 620
600 600 600
58 580 80 0CROSS SECTION 69 CROSS SECTION 70 CROSS SECTION 71
66 660 660
64 640 / 040
62 620 020
600 600 600
580 80 580 CROSS SECTION 73 CROSS SECTION Itt
5 60CROSS SECTION 72
66 660 66
64 640 64
62 620 620
GO 6CO 600
80 80 580CROSS SECTON 75 CROSS SECTION 76 CROSS SECTION 77
60
0 EXPLANATION 500-year flood _[ 00-year flood 0 I. 1964 flood 25-year flood 10-year flood 0 Low water
0 800 6c0
580CROSS SECTION 18 600'CROSS SECTION 19 HORIZONTAL SCALE, IN FEET
FIGURE 43--North Umpqua River cross-sections Rigbi boiTh 680Left bor RIçh bank bank RNht bcab 680Left bak 6
660 I 660 660'
60 6q 64
620 620 620
600CR09S SECTION 80 600CROSS SECTION 81 600CROSS SECTION 82
680 680 £80
660 660 £60
640 64 604
£2 620 £20
600 600 600' CROSS SECTION 83 CROSS SECTION 84 CROSS SECTION 85
80
60
0 Ui 8 620 62 I- Lii 00 CROSS SECTION 86 SECTION 87 z 680 2 0 EXPLANATION 660 500-year flood rIOO-year flood 1964 flood J 25-year flood 640 10-year flood Low water
620 800 1690 I HORIZONTAL SCALE. IN FEET 600 CROSS SECTION 88
70C ( 68
660
640
620 CROSS SECTION 89
FIGURE 44--North Umpquu River cross-sections
72 0LfI bon 70 Right banh
680
660 -;______- 640
620CROSS SECTION 90
700
680
660
640
620 CROSS SECTION 91
720
700
1 680
8 860 Th. H- 64 0
620 CROSS SECTION 92
TOO
80
66
64
CROSS SECTION 9
70
680 EXPLANATION 500-year flood 66 _[ 100-yew flood I.. 164 flood 25-year flood 10-year flood 64 Low water
0 800 00 I I I I I 620CROSS SECTION 94 HORIZONTAL SCALE, Fr
FIGURE 45--North Umpqua River cross-sections
73 Ri.ht bank 1Left bor* Rht ba,,k 00Left bark 70 7
680 68
66 66
64 64
620 6 96 20CROSSSECTION 95 CROSSSECTION
720 720
10a Ia
68a S80
660 660
0 640 CROSSSECTION 97
62 0 CROSS SECT tON 98
720 I 700 r
680
660
640 CROSSSECTION 99
72a 700 J 680
660
64 0CROSSSECTION 100
720 / 700 / EXPLANATION 500-year flood [100-year flood 680 l 964 flood 25-year flood 10-year flood 660 I Low water
SIC 90 0 CROSSSECTION 101 HORIZONTAL SCALE, IN FEET
FiGURE 46-- North Umpquo River cross-sections
74 )0Left bark 7 Right bk Left txrnk Rht book 72
70 7
690 68
66 660
0CROSS SECTION 102 64
82 CROSS SECTION 103
740 740 74
120 7 20 720
70 700 700
GO0 680 88
660 660 66
64 0 640 CROSS SECTION lOLl 7 60CROSS SECTION 106
620CROSS SECTION 105
ILl 14
720 I20
70 70
GO 680
860 66
0CRQSS SECTION 10? CROSS SECTION 108
74
720
EXPLAI4ATION 10 500-year flood - f100-year flood 1964 flood 25-year flood GO0 Low water
GE 0 800 1600
HORIZONTAL SCALE, IN FEET 84 CROSS SECTION 109
FIGURE 47--North Umpqua River cross-sections
75 RlQht bank Left bunk Left bunk Right bunk 74 740
72 720
700 700
680 680
66 CROSS SECTION
60CROSS SECTION 110
760 7
740 74
120 72
700 70
68 68
660 660CROSS SECTION 112
640 CROSS SECTION
740
72
700
680
660CROSS SECTION 114
76
74 EXPLANATION 500-year flood 720 [ 00-year flood l 1964 flood 25-year flood 700 10-year flood Low water
68 800 600
HORIZONTAL SCALE, IN FEET 66 0CROSSSECTION 115
FIGURE 18-- North Umpqua River cross-sections
76 Left bank Right bank Left bunk Rçh bank 740 74
72 720
70 70
68 68
0 66 CROSS SECTION 116 CROSS SECTION 117
740 740
720 720
700 720
680 680
60CROSSSECTION 118 CROSS SECTION 119
760 760
7Lf0 7';
720 7'20
700 700
80 680CROSS SECTtJN 120 CROSS SECTION 121
760 7 760
74 7'; 140
720 72 720
70 70 100
68 68 680
660CROSS SECTION 122 060CROSS SECTION 123 660CROSS SECTION 124
760 760
740 740 EXPLANATION 500-year flood rIOO-yr flood 72U 7,20 i 964 flood 25-year flood 10-year flood 700 700 Low water
810 l6O 80 I i CROSS SECTION 125 CROSS SECTION 126 HORIZONTAL 5GALE IN FEET
FIGURE 49--North Urnpqua River cross-sections
77 760LMft bw* Ibght bx* bank Right bank LO bank Rtght bik 7 760 740 / 74 74
720 720 720
700 700 700
680 6 68 CROSS SECTION 127 80CR0SSSECTION 128 0CROSSSECTION 129
760 760 760
740 740 740 720 720 J 720 700 700 700
680 80 CROSS SECTION 130 CROSS SECTION 131 680CROSSSECTION 132
760 760 780 740 740 L 760 720 720 740
700 700 720
7 680CROSS SECTION 133 680CR0S5 SECTION 134 00CROSSSECTION 135
780 780 780
760 760 760
740 740 740
720 720 720
700 700 700CROSSSECTION 138
6 6 80CROSSSECTION 136 80CROSSSECTION 137
780
760 EXPLANJVflON 500-year fcc _f100-year flcd 704 L 964 flood 25-year floed -....-..---.-- IO-yecr lcod 720 La,e:er
0 600 16C3 700 I I I CROSS SECTION 139 1-cRIZONTAL SCALE, IN FEET
FIGURE 50--North Umpqua River cross-sections
78 Left bach Right bank Left bank Right back Lnft bank Right borh 60 61) 60
40 40 40
20 20 20
0 0 0
20 20CROSSSECTION CROSS SECTION CROSS SECTION
80 80 80
I 60 60 so
40 40 40
20 20 20
0 0 0
20' -2 20 CROSS SECTION CROSS SECTION CROSS SECTION 6
80 80 80
60 60 60
40 40 40
20 20 20
0 0 0
-20 20 a CROSS SECTION CROSS SECTION 8 -CROSS SECTION 9
80 80 80
L 60 60 60
40 40 40
20 20 20 /
0 0 / 0 CROSS SECTION 12
-2 20CROSS SECTION 11
EXPLANATION -CROSS SECTION 10 500-year flood 100-year flood 1964 flood 25-year flood 0-year flood Low wafer
1690 9 I I HORIZONTAL SCALE IN FEET FIGURE 51 -- Umpqua River cross-sectionS
79 Left beak tght bock Left bonk Ri8ht bank 80 80
60 60
40 Ito
20 20
0 0 CROSS SECTION 14
2 CROSS SECTION 13
80 80
60 7/ 00
40 40
20 70 4
0 U CROSS SECTION 15
CROSS SECTI0N 16
80 80
60 60
40
20 20 / I 0 0 CROSS SECTION 17 CROSS SECTION 18
80 80
EXPLANATION 60 60 I 500-year flood -7- 00-year flood -7 - 1964 flood 40 40 25-year flood 0-year flood Low water 20 0 800 600
I I I I-RtZONTAL SCALE, IN FEET 0 0
20 CROSS SECTION 19 CROSS SECTION 20
FIGURE 2 -- IJmpquo River cross-sections
so Rq1iI bonk Left bank Aght bank Left bank Rght bank 80 80 80
60 60 60
'tO 40 40
20 20 20
0 0 0
-20 -2 CROSS SECTION 21 20CROSSSECTION 22 CROSS SECTION 23
80 80 80
60 60 60
40 40 40
20 20 20 \ Ni7
0 0 CROSS SECTION 24 CROSSSECTION 25 CROSSSECTION 26
80 80 80 A 7-J L 60 60 -J 60 7T7 (
40 40 40 20 'I 20 20 0 0 0 CROSSSECTION 2? CROSSSECTION 28 CROSS SECTION 29
100
80 80
60 60
'10 40
20 20
0 CROSSSECTION 30 CROSSSECTION 31
EXPLANATION 500-year flood 00-year flood 1964 flood 25-year flood 0 year flood Low water
0 800 I60 I I HORIZONTAL SCALE; FEET
FIGURE 53. --LJrnpqia River cross-sections
81 Left bck Right bank 001af1 berth Right boric 100 1
80 80
60 60
40 'tO
20 20
0 0 CROSS SECTION 32 CROSS SECTION 33
100 100
80 80
60 60
J 40 40 Ui ..j 20 20
0 CROSS SECTION 34 CROSS SECTION 35 Ui 100 100 >Ui 80 80
60 60
40 40 0z 20 20 y
U_I , 0 CROSS SECTION 36 CROSS SECTION 37
00
80 EXPLANATION 500-year flood 100-year flood -1964 flood 60 25-year flood 10-year flood Low water 40
0 800 600 I I 20 HORIZONTAL SCALE, IN FEET
CROSS SECTION 38
FIGURE 54 --Umpquo River cross-secIs
82 Left bank Right bank 00Left ba'J Ri?ht bank 1 0 1
80 80
60 60
40 40
20 20 L
0 0 CROSS SECTION 39 CROSSSECTION 40
00 00
:
So 60 60
0 0 0 CROSS SECTION 41 CROSS SECTION 42 CROSS SECTION 43
100 100 100
80 80 80
60 60 60 7
40 '10 'tO
20 20 20 CROSS SECTION 46
0 0 CROSS SECTION 44 CROSS SECTION 45
100
EXPLANATION 80 500-year flood 00-year flood - 1964 flood 25-year flood 60 0-year flood Low water 40 80 I HORIZONTAL SCALE, IN FEET 20 CROSS SECTION 4;7
FIGURE 55--UmpquaRiver cross-sections 00Lft bark Rr.h bank Leftbank Fght ban 1 100
80I!__ 80 80
60 60 60
40iiii-- I0 40
20 '-V 20 20 CROSS SECTION '48 _. CROSS SECTION 49 CROSS SECTION 50
100 100- 100
\ -:1 80 80 80
60 60 60
'10 *0 '40
20 20' 20 CROSS SECTION 51 CROSS SECTION 52 CROSS SECTION 53
LU I -J 100 100 10
LU z 80 80 80 LU 60 60 60 LU 40 40 40 V I- 20 20 20 CROSS SECTION 54 CROSS SECTION 55 CROSS SECTION 56 z 120 z 120
00 00
80 80
60 60
40 '40 (
20 20 CROSS SECTION 5? CROSS SECTION 58
EXPLANATION 500-year flood 100-year flood 1964 flood 25-year flood 0-year flood Low wafer
800 I 16(?0 HORIZONTAL SCALE IN FEET
FIGURE 56-- Umpqua River cross-sections
84 20LEf! bonk Left bank Ribt bank 1 12
100 10
80 80
60 60
40 40
20 CROSS SECTION 59 CROSSSECTION 60
120 120 120
100 100 100
80 80 80
60 60 60
40 40 40
20 CROSS SECTION 61 CROSSSECTION 62 CROSSSECTION 63
120 12U 120
100 100 100
80 80 80
60 60 60
40 40 CROSS SECTION 65 CROSS SECTION 66
20 CROSS SECTION 64
120 12 / /
100 L 10 / EXPLANATION 500-year flood / 00-year flood 80 80 964 flood r 25-year flood I" 0-year flood 60 60 Low wafer
) 0 800 600 40 I CROSS SECTION 6? CROSS'SECTION 68 HORIZONTAL SCALE, IN FEET
FIGURE 57 --Umpqua River cross-sections
85 Left hank Right hank bQr 12
10 00
80 80
60 60
40 40 CROSS SECTION 69 CROSS SECTION 70 CROSS SECTION 71
20 12 120
10 10 00
80 80 80
60 60 60
40 40 40 CROSS SECTION 72 CROSS SECTION 73 CROSS SECTION 74
1 1:20 20
00 00
80 80
60 60
40 CROSS SECTION 75 CROSS SECTION 76
140 r 120 / 100
80
4" 60
CROSS SECTION 77
EXPLANATION 500-year flood 100-year flood -1964 flood 25-year flood -.-. -0-year flood Law water
0 800 600
HORIZONTAL SCALE, IN FEET
FIGURE 58.--Umpqua River CrOSS-SeCtiOnS
86 Left bk Right bon3 14
120
100
80
60
0 CROSS SECTION 18
140
120
00
80
60
CROSS SECTION 19
140
120
C 100
80
60 U
CROSS SECTION 80
140 EXPLANATION 500-year flood 120 100-year flood 1964 flood 25-year flood 100 10-year flood Low wafer
80 0 800 600
I I I I HORIZONTAL SCALE, IN FEET 60 /
CROSS SECTION 81
FiGURE 59-- Umpquo River crosS-sections
87 140Left bank Rht bck EXPLANATION 500-year flood 120 100-year flood - -964 flood ___! 25-year flood 100 10-year flood Low wafer
80 0 800 600
HDRZ0NTAL SCALE, IN FEET
EQ
40 CROSS SECTION 82
140 140
120 120
100 10
J 80 80
IiJ 60 60
40' 40 z CROSS SECTION 83 CROSS SECTION 84 w 140 140
120 120 1 / 100 100 -
80 80
N 60 60
40 40 CROSS SECTION 85 CROSS SECTION 86
140 1'I0 J 120 / 120 - 100 100
80 80
60 60
40 10 CROSS SECTION 8? CROSS SECTION 88
FIGURE 60 --Umpquo River cross-seclions
88 Left bGnk R bank Left bank Rjh bank 14 140
120 120
100 100 '7
80 80
60 60
'10 CROSS SECTION 89 CROSS SECTION 90
140 140
20 120
100 00
80 80
60 CROSS SECTION 92
40 CROSS SECTION 91
14 0 1'40 140
120 20 120
00 00 100
80 80 80
60 60 CROSS SECTION 93 CROSS SECTION 95
40 CROSS SECTION 94 i;o
120 EXPLANATION 500-year flood -. -.- 100-year flood 100 -1964 flood 25-year flood
----. ... 10-year flood 80 Low water
0 800 0O
CROSS SECTION 96 HORIZONTAL SCALE, IN FEET
FIGURE 6 -- Umpqua River crosS-sections
89 Right kank Left bank Rqht bonk Left bank 14
120 12
100 00
80 80
60 60 CROSSSECTION 9? CROSS SECTION 98 plo
120
00 80 \/ CROSS SECTION 99
140 140
20 120
00 100
80 80
60 60 CROSS SECTION 100 CROSS SECTION 101
140 140
120 20
100 00
80 80
60 U 60
40 CROSS SECTION 102 CROSS SECTION 103
EXPLANATION 500-year flood 100-year flood 1964 flood 25-year flood 10-year flood Low wafer
8Ij)O 190 I I HORIZONTAL SCALE, IN FEET
FIGURE 62-- Umpqua River cross-sections
90 140Lett bank RhI txa$c
120
100 \ 80
go CROSS SECTION 105
40 CROSS SECTION iO#
160 / 140
120
100
80
CROSS SECTION 106
160
140
120
100
80
60 CROSS SECTION 101
160
140
120
100
80 EXPLANATION 500-year flood 100-year flood 60 CROSS SECTION 108 1964 flood 25-year flood 10-year flood Low water
0 800 6(X)
HORIZONTAL SCALE, IN FFET
FIGURE 63 --Lpqua River cross-sections
91 0Left bank Rigflt bank 6
40
EXPLANATION 120 / 500-year flood -. 100-year flood -1964 flood -- 25-year flood 100 0-year flood Low wafer 80 C 800
HORIZONTAL SCALE, FEET 60 CROSS SECTION109
160 60
140 140
120- 20 ---
J 100 00 w J 80 80 uJ 60' 60 CROSS SECTION 110 CROSS SECTION 111 uJ 160 16
140 140
120 120
100 100
80 80
60' CROSS SECTION 112 CROSS SECTION 113
160 16
140 140
-- 0 120 12
100 100
/ 80 80 \J 60 CROSS SECTION 114 CROSS SECTION 115
FIGURE 64-- Umpqua River cross-sections
92 1.aU bank Rgh bank 16 Left bank Rnht bank 160
14 14
2C 120
0 100
80 80
60 CROSS SECTION 117
CROSSSECTION 116
16 160
14 140
120
100
80 80
60 CROSS SECTION 118 CROSS SECTION 119
160
140 I 7
120
100 I
80 CROSS SECTION 120
160
140
120 EXPLANATION 500-year flood 100 00-year flood 964 flood 25-year flood 80 0-year flood CROSS SECTION 121 Low wafer
800 1600 I I HORIZONTAL SCALE IN FEET
FIGURE 65 --Umpqua River cross-sections
93 Rihl bonk 160Lpft bon
140
120
100
80 CROSS SECTION 122
160 I 140
20
100
80 CROSS SECTION 123
40 1 z - LiJ 12 Ui
10 I- 80 \V U- 60' CROSS SECTION 124 0z. 160
Ui 140
120
100
80 CROSS SECTION 125
EXPLANATION 500-year flood 100-year flood 1964 flood 12 25-year flood 10-year flood Low water 10
80 CROSS SECTION 126 HORIZONTAL SCALE, IN FEET
FIGURE 66 --U'npqua River cross-sections
94 160Left bank Rjh rk Left bunk Rkght bunk 60
HO 140
120 12U
100 100
80 80 CROSS SECTION 127
60 CROSS SECTION 128
00 160
0 14 140
0 12 120
00 00
80 80
CROSS SECTION 12$ CROSS SECTION 130
160 160
140 14U
120 20 Ti
100 00
80 I- 80 CROSS SECTION 131 ___
160 CROSS SECTION 132
140
120 EXPLANATION 500-year flood 100-year thod 100 1964 flood 25-year flood 10-year flood 80 Low wafer CROSS SECTION 133 800
I HORIZONThL SCALE, FJ FEET
FIGURE 67-- Umpqua River Cross-seCtions
95 160Lnft bank Rçh1 bank \ y 16 14 14
120
100 r 10
80 80 'CROSSSECTION 134 CROSS SECTION 135 CROSS SECTION 136
160 1SO 180 180
160 1 140 160 ¼.,
12 120 140 140
100 100 120 12U
80 80 100 100
60 60 80 80 CROSS SECTION 13? CROSS SECTION 138 CROSS SECTION 139 CROSS SECTION 140
0 160 180 16
14 60 14U
20 14 12
00 12 10
80 10 80 CROSS SECTION 141 0CROSSSECTION 142 CROSS SECTION 143
180 200 80
160 80 16
140 1SD 14
12 120 / 140 100 12 100
80 10 80 CROSS SECTION 144 0CROSSSECTION 1'IS CROSS SECTION 146
EXPLANA11ON 500-year flood 100-year figod 1964 flood 25-year flood 0-year flood Low water
0 81?0 l6O
HORIZONTAL SCALE, IN FEET
FIGURE 68--Umpquo River cross-sections
96 Lnf bank Rgh bank Lef I bank R,t bank Lnft bank Right bank 180 180 180
160 160 160
140 140 140
120 120 120
10U 00CROSSSECTION 147 100CROSSSECTION 148 CROSSSECTION 149
180 180 200
160 160 80
140 140 60
120 120 140
100 100 120 /
80 1001 I I I CROSS SECTION 150 CROSS SECTION 151 CROSSSECTION 152
18 18& 180
16 16 160
14 14 140
120 12 120
1 10CROSSSECTION 153 CROSSSECTION 154 100CROSSSECTION 155
180 18
160 60
140 140
120 120
10 10 CROSSSECTION 156 0CROSSSECTION 157
80 80 EXPLANATION 500-year fk)od 160 160 100-year flaod 1964 flood 25-year flood 140 140 10-year flood Low water
20 20 0 800 1600 I I I I HORIZONThL '1Q41 F, IN FEET
1 00CROSS SECTION 158 00CROSSSECTION 159
FIGURE 69 --U-npqua River cross-sections
97 Raht br,b RhI bank Let I bank bank Riqht bonk bcbac 20 2 220
200 180 18
180 160 16
160 140 14
14 12 120 0
20 100 CROSSSECTION 162 CROSSSECTION 160 CROSSSECTION 161
22 22
200 200
180 180
160 16 uJ _j 140 14 uJ (I) z '20CROSS SECTION 163 120CROSS SECTION 164 Ui 220 220 200 >UJ 200 200 80 I- UJ 180 180 60
lEo 160 14U z
140 140 120
120 120 00 CROSSSECTION 165 CROSSSECTION 166 CROSSSECTION 167
200 2
EXPLANATION 180 1 500-year flood -. - -.- 100-year flood 1964 flood 160 1 25-year flood 10-year flood Low water 140 /-/ 14
HORIZONTAL SCALE, IN FEET 120 CROSSSECTION 168 SECTION 169
FIGURE 70-- Umpquo River CrOSS-SeCtiOnS
98 La1 bank Ri9hf bank Lef I ba,k Left bank R8hI bank 200 200 200
180 180 180
160 'so 60
140 140 140
120 120CROSS SECTION 170 CROSSSECTION 171 SECTION 172
200 200 200
80 180 180
so 160 160
iLl0 140 10'I
120 120 _J SECTION 173 CROSSSECTION 174 CROSSSECTION 175 >LiJ 200 200 200 uJ 180 I t 180 180 -i j w 160 100 160 Ui
140 140 140
H- Ui 120 120 CROSSSECTION 176 120CR0S5 SECTION 1?? CROSSSECTION 178 z 220 220 0 00 200
LU 18 0 180
160 160
140 140
120 120 CROSSSECTION 179 CROSSSECTION 180
EXPLANATION 500-year flood .-100-year flood - 1964 flood 25-year flood 10-year flood Low wafer
0 800 0O
I I I HORIZONTAL SCALE, IN FEET
FIGURE 71-- Umpqua River cross-sections
99 0Lef I bank Rnht ba,k LeN bank Ri8ht bank 22 220
200 200
180 180
160 160
140 jLJ0
20 120CROSS SECTION181 CROSS SECTION 182
220 220 220
200 200 200
180 180 180
60 160 160
14 140 140
1 SECTION 183 120CROSS SECTION 184 120CROSS SECTION 185
22 220 \ 20 200
180 80
160 60
140 140 "F CROSS SECTION 186 CROSS SECTION 187 CROSS SECTION 188
220
200 EXPLANATION 500-year flood TTEE 100-year flood 180 I 1964 flood 25-year flood lU-year flood 160 Low water 90 I 90 I 140 HORIZONTAL SCALE, IN FEET
120CROSS SECTION 190
FIGURE 72 --LJmpqua River cross-sections
100 Left bank RIgb bank Lef I bank Righ? bark Left bank Right kink 220 220 220
200 200 200
180 180 180
160 160 160
14 140 140
120CROSSSECTION 191 120CROSSSECTION 192 120CROSS SECTION 193
220 220
200 20
180 180
160 16a
14 1'10CROSS SECTION 19'l 0CROSS SECTION 195
220 220
200 I 200
18 180
160 160
0CROSS SECTION 196 140CROSSSECTION 197
220 220 22
200 200 20
18 180 18
60 16
lii 14 140CROSSSECTION 198 0CROSSSECTION 199 CROSS SECTION/200
220 220
EXPLANATION 200 200 §00 year flood 00-year flood -964 flood 180 80 25-year flood 10-year flood Low wafer 160 60 0 800 600
140 HORIZONTAL SCALE, IN FEET CROSS SECTION201 140CROSSSECTION202
FIGURE 73 -- Umpqua River cross-sections
I0I Left bank Right bank Left bank Rih bank 24 240
220 220
200 200
80 too
60 160
U 140 14CROSS SECTION 203 CROSS SECTION204
24 24U
220 220
200 200 p
180 180 r w
_J 160 160
LU 140 140 CROSS SECTION 205 CROSS SECTION206
LU 240 240 > 20 220 /
LU 200 LU 200 U- z z 180 180
60 160
140 140 CROSS SECTION207 CROSS SECTION208
240 240
220 220 EXPLANATION 500-year flood 20U 200 00-year flood -1964 flood 25-year flood 80 180 10-year flood Low water
60 160 0 800 600 CROSS SECTION 209 I I HORIZONTAL SCALE, IN FEET
CROSS SECTION210
FIGURE 74 --Umpqua River cross-sections
102 Left bon Right honk Lplt bark Right bank 240 24
22 22
20 20
18 80
160 CROSS SECTION 211 CROSS SECTION212
24 \ 22 - 200 7 / r 80 EXPLANATION 500-year flood 160 00-year flood CROSS SECTION 213 -1964 flood 25-year flood 240 10-year flood Low water /
220 0 800 00 z I I I / HORIZONTAL SCALE, FEET Lu 200 Lu
80
160 CROSS SECTION 214 z 20 2140
220 220
20 200
80 80
60 160
14 140CROSS SECTION215 0CROSSSECTION 218
24 240 240
22 220 220
200 200 200
80 180 180
160 CROSS SECTION 217 160CROSSSECTION 218 160CROSS SECTION219
FIGURE 75 -- Umpqua River CrOSS-SeCtiOnS
03 Left bank Rbt bank Left bon1 RQht bti¼ Left bank Ri9ht beak 2'0 240 240
220 220 1 IL - 220
200 20' 200
180 180 180
060 160 SECTION 222 CROSSSECTION 220 CROSSSECTIONii221. CROSS 240 240 240
220 220 220
200 200 200
180 180 180
160 160 CROSSSECTION 223 CROSSSECTION 224 160CROSS SCTI0N 225
260 260' 260
240 2q 240
220 220' 220
200 20 200
180 80 180
160' ii - CROSSSECTION 226 60CROSSSECTION227 16CROSS SECTION 228
260 260 26 240 24 -' 240 220 220 22
200 200 20
180 80 18
160 16 160CROSSSECTION229 CROSSSECTION230 CROSS SECTION 231
EXPLANAflON 50Oyeor flood 00-year flood 1964 flood 25-year flood 0-year flood Low wafer 0 80 II6so HORIZONTAL SCALE, IN FEET
FIGURE 76 -- Umpqua River cross-sections
04 Left bank Right bank Left bank RihI bank 260Lett bank bah? bank 260 260
24 24C 240
220 20 220
200 200 200
80 80 CROSS SECTION233 180CR09SSECTION 2314
60 CROSS SECTION232
260 260 260
240 240 240
220 220 220
200 IT! 203 200 LU
j 180 180 CROSS SECTION236 CROSS SECTION23? uJ 60 CROSS SECTION235 I LU 26 260 260 >LU 24 240 240
22 0 220
00 0 200
80 80 CROSS SECTION238 CROSS SECTION239 180CR0S5 JLii SECTION 2140 LU 260 260 260
240 2.0 240
220 220 220
200 200 200CROSSSECTION 2143
180 '80CROSS SECTION241 CROSS SECTION 2142 EXPLANATION 500-year flood 00-year flood - 1964 flood 25-year flood 10-year flood Low water
HORIZONTAL SCALE, IN FEET
FIGURE 77-- Umpqua River cross-sections Rht bk Lf bcnk RII bonk Left bok Rht book 260Left book 260 260
240 2140 240
220 220 220
200 200 200
180CROSS SECTION 2'14 80CROSSSECTION245 180CROSS SECTION 246
260 28U 282
24 260 260
220 240 24
200 220 220
200 J 80CROSSSECTION24? CROSS SECTION 248 °CROSS SECTION 249
Ui -J 280 280 280
UJ 2bO z 26 260 Ui 24 240 240 >UJ 22 220 220
20 200 200
80 180CR0S5 SECTION250 °CROSSSECTION251 CROSS SECTION252
280 280 280
I 260 26 260
240 24 240
220 22 220
200 200 K 2 CROSS SECTION253 0CROSS SECTION 254
SECTION255 EXPLANATION 500-year flood 100-year flood -1964 flood 25-year flood 0-year flood Low water
0 800 1600
I I I I HORIZONTAL SCALE IN FEET
FIGURE 78 --Umpquo River cross-secons
106 Left bank Right bank Left bonk RIQhI bank 280Lettbank Pigkt bank 28 280
260 260 260
240 240 24 U
220 220 220
200 200CROSS SECTION25? 200CROSSSECTION 258
180CROSS SECTION 256
28 28 28
2 2 60- 2
24 24 24
22 2 220
200 20 CROSS SECTION259 200 SECTION260 CROSS SECTION261
280 280 28U
26 26 260
24 24 240
22 220 220
200 CROSS SECTION262 200 CROSS SECTION 263 200CROSSSECTION 2614
300 300 300
280 280 280
260 J 260 260
24 240 240
220 220 220
00 200 CROSS SECTION265 200 CROSS SECTION266 CROSS SECTION267
EXPLANATION 500-yeor flood -. - ---. - IOO-yeor flood 1964 flood 25-yeor flood 10-year flood Low water
800 1600 I I I HORIZONTAL SCALE IN FEET
FIGURE 79.-- Umpqua River cross-sections
07 Lef bt f49hf btk Left bonk Right bonk 300 300
28 280 28
26 280 260
240 24 24
220 220 2 CROSSSECTION268
20 300 270 200CROSSSECTION269 SECTION
300 280 300
260 280 280
2t0 260 260
240 220 240 -J w 220 _j 200 CROSS SECTION273 CROSSSECTION 271 220CROSS SECTION272
300 300 z 30 Lii 280 280 280
260 260 260
24 240
220 CROSS SECTION276 - CROSS SECTION 274 CROSSSECTION275 0z 30 EXPLANATION > 500-year flood _._._._._..00-year flood UJ 2 28 -964 flood 25-year flood .._...... ---. 10-year flood 2 2 Low water
0 800 1600 24 2 I I I HORIZONTAL SCALE, IN FEET
22 220CROSS SECTION2?? SECTION278
300 30 300-
280 28 280
260- 26 260
240 24 240
SECTION 281 220CROSS SECTION279 220CROSS SECTION 280
FIGURE 80 --Umpqua River cross-sections
108 Right bank Left bank Right bank 3 300
28 28
26 260
240 11 240CROSS SECTION 283
320 20CROSSSECTION282 / 3 / 00 I 30 280
28 260
26 24
2 '0CROSS SECTION28 220RQSSSECTION285
320 34 320
300 32 300
280 -j 300 280
260 280 260
240 260 2 0
220 220 CROSSSECTION 286 240CROSS SECTION 287 CROSSSECTION288
320 320 \ 300 30U r
280 280 -J
260 20 I
240 240CROSSSECTION 289
220 EXPLANATION CROSSSECTION290 500-year f rood IOO-yeor flood 1964 frood 25-year flood 0-year t rood Low water
0 800 I60
HORIZONTAL SCALE, IN FEET
FIGURE 81 -- Umpquo River Cross-SeCtions
109 R,ght bark Ieft bc%J, Right bank 320Left bank 32
300 300
280 28$
260 260
0 CROSS SECTION 291 CROSS SECTION 292
320
300 ____F 1LI1 280 2' 260 2:0 I 2*
320 320 320
30 300 30
280 280 28
260 260 260
24 240CROSS SECTION 296 240CROSSSECTION 29?
22 CROSS SECTION 295
320 320 320 320
300 300 300 300
rr 0 280 280 280 28
260 260 260 260
24' 240 CROSSSECTION 298240CROSSSECTION299 CROSS SECTION300 240CROSSSECTION 301
EXPLANATION 500-year flood 100-year flood - 1964 flood 25-year flood 10-year flood Low water
0 800
HORIZONTAL SCALE, IN FEET
FIGURE 82 --Umpqua River cross-sectcns
hO L&t bc,nk R,ht bor, 20Lftborc Ritit bonk Lifl bonk RIgbt banb 32 3 3"
300 300 320
280 280 30 0
260 260' 280
2140 24 260' CROSS SECTION302 0CROSSSECTION 303 CROSSSECTION 3014
3'40 3 0 3140
32 320 I 320
30 300 300 28 28a / 280 260 2 CROSS SECTION305 SECTION 306 60CROSSSECTION307
340 340
20 320 320 J
00 300 30
2280 280 28 H w 260 0CROSSSECTION308 260CROSSSECTION309 CROSS SECTION310 z - 340 314 340 z
320 32I 320
300 300 300
280 290 280
2 260CROSSSECTION 311 260CROSSSECTION312 CROSSSECTION313
340 340
EXPLANATION 320 320 500-year flood l00-yearflood 300 -964 flood 300 25-year flood 0-year flood Low water 280 280 0 800 600
260 HORIZONTAL SCALE, IN FEET CROSS SECTION314 260CROSSSECTION 315
FIGURE 83.-- Umpqua River crosS-seCtions RghI banK Hi9ht bank Left bank Right ban Lef I bcnk 340Left bank 340 340
320 32 320
300 300 300
280 280 280
260 CROSS SECTION 316 260CROSSSECTION31? 260CROSSSECTION318
340. 340 360
32 320 340
3 300 320
2 280 300
26 321 CROSSSECTION319 260CROSSSECTION 320 280CROSSSECTION
360 360 60
340 340 40
320 320 32
300 300 30
8 280 SECTION 4 ftI 28ORQSSSECTION322 CROSS 32
0 z CROSSSECTION323
60 30 360
340 U310 30
20 320 320 3
0 300 300 3
2 280 SECTION32? 280CROSSSECTION325 I
CROSS SECTION326 EXPLANATION 500-year flood 100-year flood 1964 flood 25-year flood 10 year flood Low water 80
H0R0NTAL SCALE,J FEET
FIGURE 84-- Umpquci River CrOSS-SeCtionS
112 barJ Right bank Lc1t tr bank 360
40 340
320 320
300 300
280 28 280CR0S5 SECTION 328 CROSS SECTION 330
6 CROSS SECTION 328
36 360 360
340 340 340
320 320 320
J 300 300 300
0 28CROSS SECTION 331 2800RO55SECTION 332 280CRO59 SECTION 333
EXPLANATION LU 500-year flood 100-year flood -964 flood 25-year flood 10-year flood Low water
0 800 1600
H I I I I U- z HORIZONTAL SCALE, IN FEET 0
FIGURE 85 --Umpqua River cross-sections
13