EFFECTS OF RELOCATING STATE ROUTE 151 ON THE FLOOD
PROFILES OF CONOTTON CREEK AND ITS TRIBUTARIES BETWEEN BOWERSTON AND SCIO, OHIO
By William P. Bartlett, Jr., Bruce E. Krejmas, Ronald I. Mayo f and S. William Wandle, Jr.
U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 83-4130
Prepared in cooperation with the OHIO DEPARTMENT OF TRANSPORTATION
Columbus, Onio 1984 UNITED STATES DEPARTMENT OF THE INTERIOR WILLIAM P. CLARK, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director
For additional information Copies of this report can write to: be purchased from: District Chief Open-File Services Section Water Resources Division Western Distribution Branch U.S. Geological Survey U.S. Geological Survey 975 West Third Avenue Box 25425, Federal Center Columbus, Ohio 43212 Denver, Colorado 80225 (Telephone: (303) 234-5888) CONTENTS Page Abstract ...... 1 Introduction ...... 2 Acknowledgments ...... 2 Basin characteristics ...... 5 Study area description ...... 5 Hydrology ...... 7 Flood-profile computation existing conditions ...... 7 Basic hydraulic data ...... 10 Cross sections and bridge geometry ...... 10 Roughness coefficients ...... 10 Hydraulic analysis ...... 10 Flood-profile computation modified conditions ...... 12 Basic hydraulic data ...... 13 Hydraulic analysis ...... 13 Summary ...... 15 References ...... 16
ILLUSTRATIONS Figure 1. Map showing location of study area Highway Project HAS-151-4.97 ...... 2. Map showing study area and location of cross sections, Conotton Creek between Bowerston and Scio, Ohio ...... 3. Map of drainage basin of Conotton Creek above Bowerston r Ohio, and limits of study area .. 4. Flood-frequency curves, Conotton Creek and tributaries near Scio, Ohio ...... 5. Profiles for existing and modified conditions, Conotton Creek between Bowerston and Scio, Ohio: A. Cross sections A-J ...... 18 B. Cross sections J-Q ...... 19 C. Cross sections Q-W ...... 20 D. Cross sections W-AC ...... 21 E. Cross sections AC-AG ...... 22 F. Cross sections AG-AO ...... 23 G. Cross sections AN-AV ...... 24 H. Cross sections AT-BE, 10-year flood ...... 25 I. Cross sections AT-BE, 25-year flood ...... 26 J. Cross sections AT-BE, 50-year flood ...... 27 K. Cross sections AT-BE, 100-year flood ..... 28 L. Cross sections BE-BJ, 10-year flood ...... 29 M. Cross sections BE-BJ, 25-year flood ...... 30 N. Cross sections BE-BJ, 50-year flood ...... 31 0. Cross sections BE-BJ, 100-year flood ..... 32
111 ILLUSTRATIONS Continued Page 6. Profiles for existing and modified conditions r Scott Run at mouth: A. Cross sections GA-GFM, 10-year flood ...... 33 B. Cross sections GA-GF, 25-year flood ...... 34 C. Cross sections GA-GF, 50-year flood ...... 35 D. Cross sections GA-GF, 100-year flood ...... 36 7. Profiles for existing and modified conditions, Dining Fork at mouth ...... 37 8. Profiles for existing and modified conditions, Irish Creek at mouth ...... 38 9. Maps showing inundation on Conotton Creek and its tributaries by 100-year flood under existing and modified conditions: A. Cross sections A-G ...... In pocket B. Cross sections Q-T ...... In pocket C. Cross sections U-Y, GA ...... In pocket D. Cross sections AI-AO ...... In pocket E. Cross sections AO-AR, HC-HE ...... In pocket F. Cross sections AS-AW ...... In pocket G. Cross sections AX-BE ...... In pocket H. Cross sections BF-BJ, IA ...... In pocket I. Cross sections GB-GF ...... In pocket J. Cross sections AQ-AT, HC-HF ...... In pocket K. Cross sections BE-BH, IA-IC ...... In pocket 10. Profiles for SR 151 and 100-year flood under modified conditions: A. Cross sections U-X ...... 39 B. Cross sections AJ-AX ...... 40 C. Cross sections BA-BJ ...... 41
TABLES Tables 1. Summary of basin characteristics and hydro- logic data for Conotton Creek, Scott Run, Dining Fork, and Irish Creek ...... 8 2. Water-surface elevations for design floods along Conotton Creek ...... 42 3. Water-surface elevations for design floods along Scott Run, Dining Fork and Irish Creek ...... 46
IV CONVERSION FACTORS For readers who prefer to use the International System of units (SI), conversion factors for terms used in this report are listed below: Multiply * By To obtain foot (ft) 0.3048 meter (m) mile (mi) 1.609 kilometer (km) square mile(mi2 ) 2.590 square kilometer (km 2 ) cubic foot per 0.02832 cubic meter per second second (ft3/s) (m3/s) foot per mile 0.1894 meter per kilometer (ft/mi) (m/km)
v EFFECTS OF RELOCATING STATE ROUTE 151 ON THE FLOOD PROFILES OF CONOTTON CREEK AND ITS TRIBUTARIES BETWEEN BOWERSTON AND SCIO r OHIO
By William P. Bartlett, Jr., Bruce E. Krejmas, Ronald I. Mayo, and S. William Wandle, Jr.
ABSTRACT
The Ohio Department of Transportation proposes to relocate an 8-mile segment of State Route 151 between Bowerston and Scio, Harrison County, Ohio. About 3.1 miles of this relocated highway will be within the flood plain of Conotton Creek or its tribu taries. Water-surface profiles of the 100-year flood along Conotton Creek before and after the highway relocation are virtually the same between Bowerston and the western corporation limit of Scio. Upstream from that point to the upper end of the study reach, the modified profile would be about 1 foot lower than for existing conditions. Design-flood profiles on the three studied tribu taries showed that Dining Fork profiles will be unaffected, Irish Creek profiles will be 0.7 to 0.9 foot lower, and Scott Run pro files will be 0.1 to 0.5 foot lower. INTRODUCTION The Ohio Department of Transportation (ODOT) is planning to relocate State Route 151 between Bowerston and Scio in Harrison County, Ohio (fig. 1). This realignment will be within the flood plain of Conotton Creek or its tributaries for approximately 3.1 mi of the 7.5-mi proposed highway route. As part of the highway construction project, 1.1 mi of Conotton Creek and short reaches of Dining Fork and Scott Run will be relocated. As part of a con tinuing cooperative program with ODOT, the U.S. Geological Survey (USGS) determined the effect of this highway construction pro ject on elevations of the 10-, 25-, 50-, and 100-year-frequency flood discharges along Conotton Creek and its tributaries. The purpose of this report is to present the results of a detailed hydraulic study of flood-surface profiles along Conotton Creek and its tributaries in the reach between Bowerston and Scio before and after the proposed relocation of State Route 151 (fig. 2). The ground-elevation and bridge-geometry data provided by ODOT were used to compute water-surface profiles for existing and modified conditions for the 10-, 25-, 50-, and 100-year floods in the study reach. Profiles were also computed in the downstream reaches of Scott Run, Dining Fork, and Irish Creek, all of which are tributaries of Conotton Creek. Elevations of the design floods before and after the highway construction project are presented in tabular and graphic form. Maps are also included showing the area inundated by the 100-year flood under existing and modified conditions. Elevations given in this report refer to the National Geodetic Vertical Datum of 1929 (NGVD of 1929), formerly called mean sea level.
ACKNOWLEDGMENTS The Ohio Department of Transportation (ODOT) provided cross sections of the stream valley in the study reach and the geometry of existing bridges. Cross-sectional data at locations specified by the USGS were obtained by a combination of photogrammetric methods and ground survey of the river channels and adjacent flood plains. Topographic maps showing limited 3-ft contours were fur nished by ODOT at scales of 1 in. = 200 ft and 1 in. = 80 ft. These maps, compiled in 1978, show the location of cross sections and the centerline of the proposed highway. They cover the study reaches of Conotton Creek, Scott Run, Dining Fork, and Irish Creek. Topographic maps (scale 1 in. = 50 ft, 2-ft contour in terval) showing plans for the proposed highway route between Bowerston and Scio were also provided by ODOT. The ground data for both series of topographic maps were compiled by ODOT from aerial photographs taken in April 1969. 81°05'
CARROLL T.R.207 HARRISON
40°25/
t N OHIO *J , J^ Study area
3 MILES EXPLANATION Base from the Ohio Department of Highways, 1970 Section of State Route 151 to be improved
Figure 1. Location of study area Highway Project HAS-151-4.97. 81 05 81 10'
ttM imn UAOMtogtoM «ww« Sete.Mtl. and mnnton.lMI EXPLANATION Proposed highway 151 Cross section 9A Plate numbers (see figures 9A-9K) Figure 2.«Study area showing location of cross sections, Conotton Creek between Bowerston and Scio, Ohio. BASIN CHARACTERISTICS Conotton Creek r a tributary of the Tuscarawas River r is located in Harrison County in eastern Ohio (fig. 1). The Conotton Creek basin drains an area of 81.9 mi 2 above Bowerston (fig. 3) in the unglaciated area of the State. The creek flows northwestward through the villages of Jewettr Scior Conotton r and Bowerston r and joins the Tuscarawas River in Dover Lake.
Study Area Description In the 8.8-mi study reach between Bowerston and Scior Conotton Creek follows a meandering course through fine material in a broad valley. This valley meanders in a general northwest erly direction. The flood plain ranges from 160 to I r 700 ft wide except in four reaches totaling 1.2 mi where it is confined to less than 120 ft by railway embankments. Embankments of two parallel railways confine Conotton Creek in a 0.9-mi reach down stream from Scio; one railway embankment borders one side of the flood plain in the remaining 7.9-mi reach. Land use within the Conotton Creek flood plain is primarily agricultural, although there is some urban use in the villages of Scio, Conotton and Bowerston. Within these villages, land is mainly residential; there are some scattered industrial, munici pal, and recreational areas. The remaining flood plain is forested or wooded swampland. A part of the flood plain of Scott Run is cropland, the re maining area being either grass, brush, or wooded swampland. The entire Dining Fork flood plain is used for pasture. Except for a small baseball field, the Irish Creek flood plain is occupied by weeds, brush, and a few trees. There are five roadway and six railway bridges along the Conotton Creek channel. Existing State Route 151 crosses over Scott Run by a culvert and crosses Dining Fork and Irish Creek by small bridges. The Conotton Creek channel has a fairly uniform trapezoidal shape throughout the study reach. In areas where the channel meanders excessively, there is a greater variation in the channel shape because of unstable banks. The channel banks are from 6 to 9 ft high where the flood plain is unconfined. Brush and trees line most of the flood plain adjacent to the main channel and the channel banks. The vegetation ranges from scattered trees and grass in the open areas to heavy brush and trees in the forested areas. Outside the urban areas several fallen trees were noted in the Conotton Creek channel. But from U.S.Geological Survty Cidl«,1941 lndSdo,1S31
Figure 3. Drainage basin of Conotton Creek above Bowerston, Ohio and limits of study area. Valley cross-sectional shape varies considerably along the reach. The main channel meanders within the flood plain, and this flood plain is confined at least on one side by railway embankments along most of the study reach. The channel is con fined between two railway embankments in a 0.9-mi reach down stream from Scio. Stream channels of Scott Run, Dining Fork and Irish Creek are trapezoidal in shape; their banks are 1 to 3 ft high, 4 to 8 ft high, and 4 to 9 ft high, respectively. Valley cross sections of Scott Run and Irish Creek are typically broad flood plains on either side of narrow channels. The cross-sectional geometry of Dining Fork changes as the stream channel diagonally crosses the flood plain of pasture land. The banks and the adjacent flood plains of Irish Creek and Scott Run are lined with brush.
Hydrology Peak discharges for the design floods were calculated according to the latest flood-frequency report for Ohio by Webber and Bartlett (1977). Flood magnitudes having recurrence inter vals of 10, 25, 50, and 100 years were computed using the region al regression equations for geographic area 5. The peak dis charges for Conotton Creek, Scott Run, Dining Fork, and Irish Creek are given in table 1, and shown graphically in figure 4. Flood-frequency information based on data collected since 1947 at the gaging station on Conotton Creek at Jewett (03119700) compared favorably with the regional data. The drainage area at the gage site (14.3 mi 2 ) is too small for direct transfer of peak data to the study site (upstream drainage area, 27.8 mi 2 ).
FLOOD PROFILE COMPUTATION EXISTING CONDITIONS Water-surface profiles for the 10-, 25-, 50-, and 100-year design floods were determined using the standard step-backwater method (Chow, 1959), by which profiles in a reach are computed upstream from a previously determined water-surface elevation. The U.S. Geological Survey's computer program E431 (Shearman, 1976) was used in the step-backwater analysis. This analysis assumes that flow in the reach is unobstructed and that struc tures do not fail. Table 1. Summary of basin characteristics and hvdroloaic data for Conotton Creek, Scott Run, Dining Fork and Irish Creek
Peak discharge, in ftVs Drainage Main-chanilei for indicated recurrence Stream and area slope interval, in vears location (mi^\ f ft/mi) 10 25 50 100 Conotton Creek at 14.3 20.9 a920 1,100 1,390 1,610 Jewett (03119700) bl,080 1,400 1,670 1,940 Conotton Creek above Irish Creek 27.8 14.1 1,520 1,960 2,310 2,680 Conotton Creek below 00 Irish Creek 46.6 14.1 2,220 2,830 3,320 3,810 Conotton Creek below Dining Fork 62.8 11.8 2,600 3,290 3,840 4,400 Conotton Creek at SR 151 at Bowerston 81.9 7.54 2,690 3,390 3,960 4,540 Scott Run at mouth 3.31 41.6 470 630 760 900 Dining Fork at mouth 14.7 29.3 1,240 1,610 1,910 2,220 Irish Creek at mouth 18.8 4.62 770 1,000 1,200 1,410
Station records (1947-75) Computed by regression equation EXCEEDENCE PROBABILITY 0.1 0.04 0.02 0.01 10,000 [
O z O O Ul CC UJ a. i- UJ Ul u. O 1,000 - m S O Z
* Ul (3 CC < X O
100 10 25 50 100
RECURRENCE INTERVAL, IN YEARS EXPLANATION 1 Conotton Creek at State Route 151 at Bowerston 2 Conotton Creek below Dining Fork 3 Conotton Creek below Irish Creek 4 Conotton Creek above Irish Creek 5 Dining Fork at mouth 6 Conotton Creek at Jewett (Bulletin 45) 7 Conotton Creek at Jewett (Station records) 8 Irish Creek at mouth 9 Scott Run at mouth
Figure 4. Flood-frequency curves, Conotton Creek and tributaries near Sclo, Ohio. Basic Hydraulic Data Cross Sections and Bridge Geometry Cross-section data along Conotton Creek, Scott Run r Dining Fork, and Irish Creek within the study area (fig. 2) were pro vided by ODOT. The cross-section locations had been selected by Geological Survey personnel following a field inspection. Over- bank data were compiled by ODOT by photogrammetric methods from aerial photographs taken in April 1969. Geometry of the main channel, adjacent flood plain, and bridges were obtained from ground survey by ODOT field survey parties during the summer and fall of 1978. For each cross section, the flood-plain and channel-section data were merged into a composite valley cross section. Only the cross sections in the Scott Run reach were compiled entirely by photogrammetry; this narrow, shallow channel could be defined from the aerial photographs. The cross-section locations are indicated on the study area map (fig. 2), on the profiles (figs. 5-8 and 10, at the end of report) and on the flood inundation maps (fig. 9, in pocket at the back of report).
Roughness Coefficients Manning's roughness coefficient "n" was used to compute the hydraulic property (conveyance) of each cross section and to compute friction loss in the reach between adjacent sections. Roughness coefficients for existing conditions were evaluated on the basis of the field reconnaissance during August 1978. Infor mation on roughness characteristics in Barnes (1967) and Chow (1959) aided in selecting the n nn values. Summer foliage condi tions were assumed. Roughness values for the Conotton Creek channel range from 0.035 to 0.064. For the flood plain, the range is from 0.016 to 0.100. Roughness values in the channel of Irish Creek range from 0.026 to 0.040 and, in the flood plain, from 0.030 to 0.065. In the Dining Fork reach, the roughness ranges from 0.028 to 0.034 in the main channel and is 0.038 at all stages in the flood plain. Roughness values for Scott Run range from 0.028 to 0.38 in the main channel and from 0.035 to 0.085 on the flood plain.
Hydraulic Analysis A stage-discharge relationship was developed for Conotton Creek below State Route 151 in Bowerston using the convergence reach method discused by Davidian (1976). The initial section was located several thousand feet downstream from the study reach in order that normal depths would be defined at the beginning of the study reach.
10 Flooding in the tributary reaches is caused by a combination of backwater from Conotton Creek and peak flows in the tributary basins. Initial water-surface elevations for Scott Run r Dining Fork, and Irish Creek were computed by the slope-conveyance method (Wiitala and others, 1961). Profiles computed by routing flood discharges upstream from these starting elevations were compared with backwater profiles from flooding by Conotton Creek; the profile with the highest elevations was used for the design flood. The cross sections located by ODOT on the work maps (1 in. = 80 ft and 1 in. = 200 ft, 3-ft limited contours) were adjusted to maintain each cross section perpendicular to the flow line. Cross sections were extended, shortened, or added to define changes in the reach geometry or roughness. A few cross sections were relo cated horizontally to improve the agreement between the photo- grammetric and ground-survey sections. In the profile computations, flow distances between cross sections upstream from the starting point were required. Where the main channel meanders across the flood plain or where the flood plain is curvilinear, an effective reach length between cross sections was used. In these situations the flow distance was weighted according to the relative flow distance and convey ance of the main channel versus the relative flow distance and conveyance of the overbank of the flood plain. An initial flow distance of 0 ft was assumed at the Carroll-Harrison County line, which is about 2,100 ft downstream from the SR 151 bridge in Bowerston. The geometry of two irregular bridge openings was adjusted to avoid computational problems. The double-arch railway bridge in Bowerston (between sections C and D) was treated as an equiva lent type I bridge opening as defined by Matthai (1967). The Bridge Street bridge in Bowerston between sections E and F was analyzed as a series of valley cross sections because most of the flood flow goes over the low road embankment rather than through the bridge. Under low and medium flow conditions the entire discharge of Conotton Creek is confined between two railway embankments in an 0.9-mi reach downstream from the railway bridge just east of Eastport Road in Scio (sections AT to AZ). During high flood flows when the water surface upstream from Eastport Road is higher than 965.7 ft, the stream overtops Eastport Road and flows through a flood-plain channel north of the railway embankments. This flow rejoins Conotton Creek 0.9 mi downstream, below the railway bridge at section AS.
11 An elevation-discharge relationship was computed by the flow-around-island method (Davidian, 1976) for both the main channel and the overflow channel at Eastport Road to apportion the flood flows between the two routes. These ratings were combined for a total flow rating to continue computation of the flood profiles upstream from this point. The computed water-surface elevations for existing condi tions for the 10-, 25-, 50-, and 100-year floods are summarized for Conotton Creek in table 2 (at the end of report). The flood elevations for Scott Run, Dining Fork, and Irish Creek are given in table 3 (at the end of report). Profiles of the design floods along Conotton Creek are shown in figure 5 (A-H). Profiles of the design floods in the tributary reaches are shown in figures 6, 7, and 8 for Scott Run, Dining Fork, and Irish Creek, respec tively. Boundaries of the 100-year flood under existing conditions are delineated in figure 9 (A-K). The area inundated by the 100- year flood along Conotton Creek is shown in figure 9 (A-H). Limits of the 100-year flood on the tributary streams are shown in figure 91 for Scott Run, figure 9J for Dining Fork, and figure 9K for Irish Creek. Small areas within the flood boundaries that may lie above the flood elevations are not delineated owing to a lack of detailed topographical information. Inundation at spec ific sites should be determined on the basis of the elevations given in the profiles rather than from the flood maps.
FLOOD-PROFILE COMPUTATIONS MODIFIED CONDITIONS The relocation of State Highway 151 between Bowerston and Scio involves realignment of the stream channels as follows: 6,000 ft of Conotton Creek (sections AI to AN, AQ, and BA to BE), 440 ft of Scott Run, and 410 ft of Dining Fork. The proposed highway route is within the flood plain of Conotton Creek and its tributaries for 3.1 mi. In the encroachment areas the flood plain will be further altered by clearing and seeding the land within the defined work limits. There are additional crossings of Conotton Creek proposed in the Scio area. An additional bridge is planned over Dining Fork. The existing structures over Conotton Creek in Bowerston and over Scott Run will be replaced by structures with wider spans. No construction is planned within the flood plain of Irish Creek. The location of the proposed highway route through Scio would cut off the right-bank overflow channel at a point about 1,800 ft downstream from Eastport Road, forming a storage area. Under existing conditions, 55 percent of the 100-year flood was carried by this overflow channel. The modified plans include a 22-ft-wide concrete flume that will convey 70 percent of the 100- year flood. The flume will divert the flood flow from a point
12 upstream from the railway bridge, about 400 ft upstream from Eastport Road, to a point about 2,200 ft downstream. At this point a dredged channel is to carry the flow from the flume to a point opposite the railway bridge at section AS, where it rejoins Conotton Creek. The concrete flume will be placed between the existing northernmost railway embankment and the proposed highway embankment.
Basic Hydraulic Data Highway plans for the proposed project were used to define the roadway encroachment pattern and to determine the extent of channel relocation. Revised channel sections were combined with existing overbank data to form complete valley sections. Exist ing overbank data were revised to include the relocated roadway embankment, the location of which was determined from the 3-foot contour interval map provided by ODOT. Sections that were relo cated are indicated in the tables and figures with an "m" in the identifier. The geometry for each of the proposed bridges and culverts was available from the roadway plans. Roughness coefficients were revised for areas where the field conditions would be altered by the proposed highway. Roughness values for the Conotton Creek channel under modified conditions range from 0.030 to 0.064, and range in the flood plain from 0.016 to 0.100. Roughness in the main channel of Din ing Fork ranges from 0.028 to 0.034; the flood plain roughness is equal to 0.038 under modified conditions. In the Scott Run reach, the revised roughness coefficient of the channel ranges from 0.018 to 0.038, and in the flood plain, from 0.030 to 0.085. Roughness coefficients for Irish Creek range from 0.026 to 0.040 in the main channel and from 0.030 to 0.065 in the flood plain.
Hydraulic Analysis Water-surface profiles for modified conditions of Conotton Creek were computed by routing the design floods upstream from the previously determined elevations at Bowerston. The modified cross sections and bridge sections were used in the step- backwater computations. The reach beween sections A and AI was not reanalyzed because it was not modified by the design plans. Profile computations were continued from section AI to the up stream end of the study reach of Conotton Creek using the modi fied cross sections and revised flow distances. The design-flood elevations are lowered as much as 1.1 ft by improving and lower ing the stream bed in the reach between sections AI and AO.
13 The reach from AS to AZ where the flume and dredged channel will carry the previous Eastport Road overflow was treated by the flow-around-island method (Davidian, 1976). In the reach between the railway bridge at section AS and Eastport Road at section AZ, water-surface elevations in the main channel are lowered as much as 2.1 ft. This is due to a diversion of a large part of the flow into a flume north of the railway. (Note: For this reach, the flood profiles shown in table 2 and figure 5 are for the main channel.) Flood flows were divided between the flume and the main Conotton Creek reach between sections AS and BA on the basis of relative conveyance of the two channels. Flows in the two channels were combined above the point of diversion, a combined elevation-discharge rating was computed, and the total flood flows were routed upstream to the upper end of the study reach. The computed water-surface profile elevations for the 10-, 25-, 50-, and 100-year floods along Conotton Creek under modified conditions are summarized in table 2 and shown graphically in figure 5. The area inundated by the 100-year flood under modi fied conditions is shown in figure 9 (A-K). The profiles of the new SR 151 and the modified 100-year flood elevations are shown in figure 10. Water-surface elevations on the tributary streams were determined by the same procedures used in the analysis of exist ing conditions. In the Scott Run reach, the backwater and peak- flow profiles were merged to form the maximum profile for each frequency discharge. Scott Run will be conveyed through the pro posed highway fill by two culverts. The existing roadway fill will not be leveled, but its culverts are to be removed. Up stream from the proposed roadway the water-surface elevations will be increased by 0.1 to 0.5 ft above existing conditions. Downstream from the proposed roadway the modified water-surface elevations are about the same as those for existing conditions. Backwater from Conotton Creek controls the water-surface elevations in the entire Dining Fork and Irish Run reaches in the study area. The proposed route for State Highway 151 is down stream from the existing highway at the crossing of Dining Fork. The highway project involves relocating the channel of Dining Fork between the mouth and existing highway. The entire Dining Fork study reach will be in backwater from flooding on Conotton Creek. There is no essential difference between the existing and modified flood profiles on Conotton Creek at its confluence with Dining Fork.
14 Water-surface elevations on Irish Creek are also under back water from Conotton Creek. The elevations for the design floods on Conotton Creek in this area are 0.7 to 0.9 ft lower under modified conditions than under existing conditions. The water-surface elevations for the 10-, 25-, 50-, and 100- year floods along the tributary streams are summarized in table 3. The profiles of the design floods for modified conditions are shown in figures 6, 7, and 8 for Scott Run, Dining Fork, and Irish Creek, respectively. The area inundated by the 100-year flood on the tributary streams is shown in figure 91 for Scott Run, figure 9J for Dining Fork, and figure 9K for Irish Creek.
SUMMARY Relocation of State Highway 151 will either reduce or have little effect on the design-flood profiles in the 8.8-mi reach of Conotton Creek between Bowerston and Scio. The 100-year flood profiles from Bowerston to the western corporate boundary of Scio will be virtually unchanged, and upstream from that point to the end of the study reach, the modified profile will average 1 foot lower. The design-flood profiles for the three tributaries that were studied indicated that Dining Fork profiles will be unaffected, Irish Creek profiles will be 0.7 to 0.8 ft lower, and Scott Run profiles will be 0.1 to 0.5 ft higher.
15 REFERENCES Barnes, H. H. f Jr., 1967, Roughness characteristics of natural channels: U.S. Geological Survey Water-Supply Paper 1849, 213 p. Benson, M. A. and Dalrymple, Tate, 1967, General field and office procedures for indirect discharge measurements: U.S. Geo logical Survey Techniques of Water-Resources Investigations, Book 3, chap. Al, 30 p. Bodhaine, G. L., 1968, Measurement of peak discharge at culverts by indirect methods: U.S. Geological Survey Techniques of Water-Resources Investigations, Book 3, chap. A3, 60 p. Bradley, J. N., 1970, Hydraulics of bridge waterways: U.S. Department of Commerce, Bureau of Public Roads, Hydraulic Design Series no. 1, 111 p. Chow, V. T., 1959, Open-channel hydraulics: New York, McGraw- Hill, 680 p. Davidian, Jacob, 1976, Computation of water-surface profiles in open channels: U.S. Geological Survey Techniques of Water Resources Investigations, Book 3, chap. A15, unpublished. Matthai, H. P., 1967, Measurement of peak discharge at width contractions by indirect methods: U.S. Geological Survey Techniques of Water-Resources Investigations, Book 3, chap. A4, 44 p. Shearman, J. 0., 1976, Computer applications for step-backwater and floodway analyses, computer program E431 user's manual: U.S. Geological Survey Open-File Report 76-499, 103 p.
16 Webber, E. E., and Bartlett, W. P. Jr., 1977, Floods in Ohio, magnitude and frequency: Ohio Department of Natural Resources Division of Water Bulletin 45, 74 p. Wiitala, S. W., Jetter, K. R., and Sommerville, A. J., 1961, Hydraulic and hydrologic aspects of flood-plain planning: U.S. Geological Survey Water-Supply Paper 1526, 69 p.
17 ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET
SR-151 bridge Bowerston
V \ X N V \ :«<»:* « " ±3--Bi»0 So2S oo
O O 9 O ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET
to B» a3 3 o a o o 3 a o o 3 O *» r+ O 3 O O1 r+ * V o tt 3 a CO 5"o o 94 1 I I I I I I I O) CM O) u. O 992 H Q _l 91 O H CC Ul 90 O UJ O 949 ui O 48 EXPLANATION O - 100 yaar flood 03 --- 50 yaar flood < " " ?9 yaar flood Z -- 10 y«cr flood 2 946 Low chord and road H I vorflow at brldgo Craaa a act I on UI location u! 949 I I I I I 1 I I I I I I ! I 13,000 14,000 19,000 16,000 17,000 19,000 10,000 19,500 DISTANCE UPSTREAM FROM CARROLL-HARRISON COUNTY LINE, IN FEET Flguro 5c.~Profll«8 for oxlatlng and modified conditions, Conotton Croak batwaan Bowaraton and 8clo, Ohio. ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET 01 'ia 3 o a O o 9 0 * * 0 9 0) O O 5"ar zz ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET CD (0 (0 CO CO CO Ol Ol Ol o o O) a OB CO o to 1 I T I 01 "l o o a3 O o 3 O *» *» O 3 O ye cr CD O * O 3 tt 3 a (0 o o o I I I I I 963 ui "I I I T 1 I I T 1 I I I I T u. 0» 962 o> u. O 961 D K- X x^ x 960 s '/*-'',* O flC iu 959 ui g ui ro O w channel ebortened 1,000 feet 957 KOI JJJ 956 EXPLANATION O 100 year flood flO --- 50 year flood - - 25 year flood O 955 - 10 year flood __ Modified xk Cross section UI IAG] location -i 954 I I I 30,000 31,000I I I 32,000 33,000 34,000 ui 29, 000 35,000 35*500 DISTANCE UPSTREAM FROM CARROLL-HARRISON COUNTY LINE, IN FEET Figure 5f. Profiles for existing and modified conditions, Conotton Creek between Bowerston and Scio, Ohio. ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET Tl tt O O 3 a o o 3 O * v+ o 9 V O t O 3 0» a3 5"o 3-o ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET <0 Tl ^ O \ (0 H \ o m ^C \ « M r- \ \ 3 o a. o K o O o > 3 a a. V « O O o o Eastport c i Road bridge z bridge m railroad a o m m H V\ (0 5"o \ o ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET k® <0 <0<0<0<0 n o f^ § e Ol "i _®~\ \ ! \ \ o i N a ti \ \ 2" o * « o V' \ ! : 2 § ? 3 - '« \ ? « z \ \ i 5. o » * a m Z I % * it S 3 o- \ \ 1 a S S i S a ^ : \ \ i 2 a \ * 3 e o a B 0 « * -®~ \ \ 1 3 > W a So ^ \ a =1 o ° o po 3 J. : \ \ \ \ ;* ." I Z 0 3D ? 2 \ x ft 2 w ' - ' \ \ « ° t \ x s 3 Z ^ N \ « 0 0 g ^ o5 N \\ sa Eastport 9 z * H \x/~ V v o 1 bridge! V < \ \ * ~_ * ® v YV .railroad v/ brldflo I* *.- /5V II ', ®~ "** ^^ * - o 2 ~ I | m * » : s c - o r «»» 2 ^~ v \ 5 H pj oo o» r \ \ »* o °" S* S'* 5 /1\_ V v _ 3 J0 55- «* > \ \ 3 § 2S a H H \ \ a ^ ± a o O /SV_ V N (0 « o *» 2 z \9/~ \ \ 2. o 3 3 ft v v __ o o CTo, _ \ \ o O ^ s° ^^ S £ 0 -Ol 1 *°1 1 I o o iu 971 IU u. oT 970 iu CM 0) U. modified flow divided-part of flow carrlad by flume and open ditch X O 969 968 o oc 967 o IU o o IU o Z 965 o 964 EXPLANATION 50 year flood Modified O 963 Low chord an d road H overflow at bridge AT (AU) Cross section IU location I I I I I I 40,000 41,000 42,000 43,000 44,000 45,000 46,000 46,500 DISTANCE UPSTREAM FROM CARROLL-HARRISON COUNTY LINE, IN FEET Figure 5j. Profiles for existing and modified conditions, Conotton Craak batwaan Bowarston and Sclo, Ohio. ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET o ^ O tt a3 3 o a o 3 CO < O O 3 O o ^ o DO O O ^ Cft < * o tt a3 o"o o 7 o ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET jt<0 i >« 5: 3 o 2 00 o r o s r- _ CO I I 0 > _ o M o3 30 S- co i * zo oen ?9 8C 1 % * * H o- < * z * m _ S 1 2 /OB\_| __1 . ». Z - \[n/ 1 1 CO o o "n g ~~ m X - 0 r-S- -0 S H - ; oo o o r CO OO <« Q.^. -fci F+ oto «* < <^ O 3 * "*S S"* w tt 5^» oo o.^ ^ 3 °- 01 ?: » a ® O CO M o *2 2 z 2. o _ P a a * 0 0 2. o ttS ? ~ 2» a o ,M * 01 i o o 0£ : *^ ye » ^ 3D o- w * O « < z o ! « g 5 o g ? - S H J ^ 5 E * z ' 1 o m II 3 01 /W\_|__ 1 | 1 09 Z ,"* W^M , 0 _ O * m O '! Xm ~ 5 3° or m*» TI * o7 25 o £' zH 0 _ _ r+ ~ I z 2 m -II1 1 S" 1* §; < m f i i m o m ° ^% M{|| ** ^ H » AA S *^ « r* oTo (0 H o m CO 0 H 3 9 a m 3 o * a o o O 4 2> o« o O 3 r 0> r i O O 3J <0 o 3 g O 1 o 0 o H -< 0 0 m 3 09 O m m x 0 m O r- » H CB -^ 00 o o r r* tt ^ O S2 ^ 3 0 3 a CO o IS o a o 7 o ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET (0(0(0(0 «0(0CO «0 o CO H O) tt O m co ; 2 ° S o > Tl 39 o z 2 « SR-151 bridge I s low chord st««l 970. 9 CD 2 o 3 a 3 o CO o a z \ o o 2 o 3 i ° z H < O 3 C* CO o o T1 i m Or- JE-* 1 5 oo o oo s "s ao COCB a 958 u. 957 CM O) U. O 956 2 D I- // 955 /'' I- tc 954 I- IU O O 953 IU O Z 952 O Hi 951 O EXPLANATION - - 25 year flood ---- Modified O 950 Low chord and road" P overflow at bridge Cross section (GE) (GF location 949 HI 1,000 2,000 3,000 4,000 5,000 6,000 6,500 DISTANCE UPSTREAM FROM CARROLL-HARRISON COUNTY LINE, IN FEET Figure 6b. Profiles for existing and modified conditions, Scott Run. ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET «0(0 I mi n b *c 20 o° a w _ * H i 0) > o z i I »" s"° ic >o _ * _/5>y_ - e" «* o 0 0> HI Q n * S _ x O /w\__ i 5" 3C \O/ x^ _ = 0 3 > CO ^ i SR-151 bridge » 0 ^>. low chord steel S o ° ~ N>X 970.9 a r- ° \2/ x A 3 ' \ i f \m/ ^v\ i" M X - a 04. (TI^~ ^ o Z o \ 3 0 § a 00 - c . z 0 H 3 < w z o m I 2 "- « /C)\ I__ I | z o \^/ I I ! 39 TlO I m c mo 1 X 3 m O r sw "O H ^ oo o o i- oo <* Z L _o» * S< > -§2 ^S ± 5 0) b °" ** 2 z _ 0 3 0-Q. * 0 "0 0) «* ~ Tl o o £ o o Cft H 0) > a o ^ o Cft » H O a o in TI a o 2 SR-151 bridge a o a 3 S § a r 3 i a Cft o o z o 3 o a o H < CO Z O m z a T1 e m m H S 967 u. 9 z TJ oT 966 A 0» IL ° 965 <0 £ 4* "O .2 s X U) 964 O -a - Existing & modified oc 963 Existing & modified Existing & modified 111 o o 962 111 o Existing & modified 961 JJ 960 EXPLANATION O 100 year flood to 50 year flood 25 year flood z 10 year flood O 959 Low chord and road" I overflow at bridge Cross section Ul location 958 1,000 2,000 3,000 4,000 DISTANCE UPSTREAM FROM CONOTTON CREEK, IN FEET Figure 7.--Profiles for existing and modified conditions, Dining Fork. 37 974 UL Z O 0*1 973I "o CM 0) UL O 972 10 D I- 971 oc 100 year modified Ul 970 I- __ 50 year modified 114 O O 969 Ul 25 year modified O _l < z 968 10 year modified o z EXPLANATION Ul 967 100 year flood o ._ 50 ycar f| O od m - 25 year flood 10 year flood z ~~ ~ Modified O 966 Low chord and road I overflow at bridge Cross section Ul location -I Ul 965 1,000 2,000 3,000 4,000 DISTANCE UPSTREAM FROM CONOTTON CREEK, IN FEET Figure 8.--Profiles for existing and modified conditions, Irish Creek. 38 O 970 9 U. O \ IU \ P 960 IU O O IU O z O 955 IU Conotton Creek 100 - year flood O 0) IU Cross section locations IU 945 U- 380 390 400 410 420 DISTANCE, IN 100-FOOT STATIONS Figure 10A. Profit* of State Rout* 151 and 100-year flood under modified conditions. 39 ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET ID e O 00 o ^ O 7 - (ft»» - J"O (ft _ 01 - § O o o o ? o < H 5 80> oO a e (ft 3 a 3 o a \ o o 3 / a ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET o o Vt H o O o c* m a r a a o o so 2» nI 3 a O O (ft 2 H o O O O Z I 0) o o a e 3 a Table 2. Water-surface elevations for design floods along Conotton Creek Water-surface profiles, present and modified conditions (Elevation in feet, National Geodetic Vertical Datum of 1929) River distance (feet) 10-year 25-year 50-Year lOO-Year Section Present Modified Present Modified Present Modified Present Modified Present Modified A Initial section 1,580 1,580 935.3 935.3 935.9 935.9 936 .4 936.4 936.8 936.8 B 2,070 2,070 935.5 935.5 936.1 936.1 936 .5 936.5 936.9 936.9 SR 151 bridge C 2,280 2,280 935.8 935.8 936.5 936.5 937 .0 937.0 937.5 937.5 RR. bridge 2,360 2,360 D 2,530 2,530 937.0 937.0 938.2 938.2 938 .9 938.9 939.8 939.8 E 2,930 2,930 937.2 937.2 938.3 938.3 939 .0 939.0 939.9 939.9 Bridge Street bridge F 3,010 3,010 937.3 937.3 938.4 938.4 939 .0 939.0 939.9 939.9 G 3,340 3,340 937.6 937.6 938.6 938.6 939 .2 939.2 940.0 940.0 H 5,200 5,200 938.4 938.4 939.3 939.3 939 .8 939.8 940.5 940.5 I 6,690 6,690 940.9 940.9 942.1 942.1 943 .0 943.0 943.8 943.8 J 7,030 7,030 941.0 941.0 942.2 942.2 943 .1 943.1 944.0 944.0 K 8,560 8,560 941.2 941.2 942.3 942.3 943 .2 943.2 944.1 944.1 L 9,610 9,610 942.4 942.4 943.5 943.5 944 .3 944.3 945.2 945.2 M 10,610 10,610 943.8 943.8 945.2 945.2 946 .2 946.2 947.2 947.2 N 11,350 11,350 945.0 945.0 946.5 946.5 947 .6 947.6 948.6 948.6 0 11,870 11,870 945.9 945.9 947.4 947.4 948 .5 948.5 949.0 949.0 P 12,440 12,440 946.1 946.1 947.7 947.7 948 .8 948.8 949.9 949.9 Q 13,280 13,280 946.2 946.2 947.7 947.7 948 .8 948.8 949.9 949.9 Table 2. Water-surface elevations for design floods along Conotton Creek Continued Water-surface profiles, present and modified conditions (Elevation in feet, National Geodetic Vertical Datum of 1929) River distance (feet) 10-year 25-year 50-year lOO-year Section Present Modified Present Modified Present Modified Present Modified Present Modified R 14, 200 14,200 946.2 946.2 947.8 947.8 948.8 948.8 949.9 949.9 S 15, 600 15,600 946.7 946.7 948.0 948.0 949.0 949.0 950.0 950.0 T 17, 170 17,170 948.2 948.2 948.9 948.9 949.6 949.6 950.4 950.4 U 18, 510 18,510 949.4 949.4 950.1 950.1 950.6 950.6 951.3 951.3 V 19, 140 19,140 950.1 950.1 950.8 950.8 951.4 951.4 951.9 951.9 Co. Rd. 25 bridge W 19, 260 19,260 951.1 951.1 952.2 952.2 953.1 953.1 953.8 953.8 X 20, 030 20,030 952.0 952.0 953.2 953.2 954.1 954.1 954.8 954.8 Y 20, 620 20,620 952.6 952.6 953.8 953.8 954.7 954.7 955.5 955.5 Scott Run 21, 580 Z 22, 280 22,280 952.9 952.9 954.1 954.1 955.0 955.0 955.7 955.7 AA 23, 240 23,240 953.3 953.3 954.4 954.4 955.2 955.2 956.0 956.0 AB 23, 830 23,830 953.8 953.8 954.9 954.9 955.7 955.7 956.4 956.4 AC 24, 300 24,300 954.0 954.0 955.1 955.1 955.9 955.9 956.6 956.6 AD 25, 980 25,980 954.2 954.2 955.3 955.3 956.0 956.0 956.8 956.8 RR. bridge AE 26, 140 26,140 954.2 954.2 955.3 955.3 956.1 956.1 959.5 959.5 RR. bridge AF 26, 400 26,400 955.3 955.3 956.5 956.5 957.4 957.4 960.4 960.4 AG 29, 300 29,300 955.7 955.7 956.8 956.8 957.6 957.6 960.4 960.4 AH 30, 780 30,780 956.7 956.7 957.4 957.4 958.0 958.0 960.5 960.5 Table 2. Water-surface elevations for design floods along Conotton Creek Continued Water-surface profiles, present and modified conditions (Elevation in feet, National Geodetic Vertical Datum of 1929) River distance (feet) 10-year 25-year 5O-year lOO-vear Section Present Modified Present Modified Present Modified Present Modified Present Modified AI 31 r 640 31 ,640 957.7 957.7 958.4 958.4 959.0 959.0 961.0 961.0 AJ 32,010 32 ,010 958.0 958.0 958.7 958.7 959.3 959.3 961.1 961.1 AK 32,330 32 ,330 958.0 958.0 958.8 958.7 959.4 959.3 961.2 961.1 AL 33,630 33 ,030 958.2 957.9 958.9 958.7 959.5 959.3 961.2 961.1 AM 34,010 33 ,530 958.4 958.1 959.1 958.9 959.6 959.6 961.3 961.3 AN 34,650 33 ,930 959.2 958.1 959.8 959.0 960.2 959.6 961.6 961.4 AO 35,270 34 ,260 960.0 959.5 960.5 959.8 961.0 960.2 962.1 961.7 AP 36,340 35 ,330 961.3 961.2 961.9 961.7 962.4 962.2 963.2 963.0 AQ 37,110 36 ,060 961.5 961.5 962.2 962.2 962.7 962.7 963.4 963.4 Dining Fork 37,400 AR 37,700 36 ,510 961.7 961.7 962.3 962.3 962.8 962.8 963.5 963.5 ASa 39,990 38 ,800 962.1 962.1 962.6 962.6 962.9 962.9 963.6 963.6 RR. bridge AT 40,040 38 ,850 962.1 962.1 962.6 962.6 963.3 963.0 964.1 963.8 AU 40,320 39 ,130 962.7 962.2 963.2 962.8 963.7 963.2 964.5 964.0 AV 40,980 39 ,790 963.6 962.5 964.0 963.1 964.4 963.6 965.0 964.4 AW 42,670 41 ,480 964.8 963.1 965.1 963.8 965.5 964.4 966.1 965.1 AX 44,290 43 ,100 966.0 963.9 966.4 964.8 966.7 965.4 967.2 966.1 Eastport Road bridge AY 44,520 43 ,330 966.5 964.1 966.9 965.0 967.3 965.7 967.8 966.4 Table 2. Water-surface elevatiops for design floods along Conotton Creek Continued Water-surface profiles, present and modified conditions (Elevation in feet, National Geodetic Vertical Datum of 1929) River distance (feet) 10-year 25-year 50-vear 100-year Section Present Modified Present Modified Present Modified Present Modified Present Modified AZ a 44 ,730 43,540 966.6 964.2 967.0 965.1 967.4 965.8 967.9 966.5 RR. bridge BA 44 f 820 43,630 967.2 964.4 967.6 965.4 968.1 966.2 968.6 966.9 BB 45 ,170 43,990 967.2 964.6 967.7 965.6 968.1 966.4 968.6 967.2 BC 45 ,510 44,330 967.3 964.8 967.8 965.8 968.2 966.6 968.7 967.4 BD 45 ,860 44,690 967.8 965.2 968.4 966.2 968.8 966.9 969.3 967.7 BE 46 ,160 44,980 968.2 965.4 968.8 966.4 969.3 967.1 969.8 967.9 SR 646 bridge BF 46 ,260 45,080 968.6 967.1 969.3 968.0 969.9 968.8 970.5 969.7 BG 46 ,640 45,460 969.0 967.9 969.8 968.7 970.4 969.5 971.0 970.2 Irish Creek 47 ,100 45,920 BH 47 ,390 46,210 969.2 968.3 969.9 969.1 970.5 969.8 971.1 970.5 BI 48 ,070 46,900 969.3 968.7 970.1 969.4 970.6 970.0 971.6 970.7 BJ 48 ,650 47,510 969.7 969.7 970.5 970.3 971.0 970.8 971.6 971.3 a Stream channel divided into two channels between AS and AZ Table 3. Water-surface elevations for design floods along Scott Run, Dining Fork and Irish Creek Distance Water-surface profiles, present and modified conditions upstream from (Elevation in feet, National Geodetic Vertical Datum of 1929) Conotton Creek Stream and (feet) 10-vear 25-vear 50-year lOO-vear section Present Modified Present Modified Present Modified Present Modified Present Modified SCOTT RUN GA 400 400 951.8 951.8 953.0 953.0 953. 9 953.9 954.6 954.6 GB 2,000 2,000 951.8 951.8 953.0 953.0 953. 9 953.9 954.6 954.6 GC 2,680 2,680 951.8 951.8 953.0 953.0 953. 9 953.9 954.6 954.6 SR 151 2,900 2,900 GD 3,140 955.6 955.7 955. 8 955.9 GE 3,530 955.9 956.1 956. 2 956.4 GF 3,820 956.6 956.8 957. 0 957.1 GDM 3,180 955.4 955.6 955.7 955.7 GEM 3,630 956.0 956.3 956.6 956.9 GFM 3,920 956.9 957.1 957.3 957.5 DINING FORK HA 0 0 961.5 961.5 962.3 962.3 962. 7 962.7 963.5 963.5 HB (Proposed SR 151) 105 105 961.5 961.5 962.3 962.3 962. 7 962.7 963.5 963.5 HC 180 180 961.5 961.5 962.3 962.3 962. 7 962.7 963.5 963.5 HD (Existing SR 151) 350 350 961.5 961.5 962.3 962.3 962. 7 962.7 963.5 963.5 HE 1,530 1,530 961.5 961.5 962.3 962.3 962. 7 962.7 963.5 963.5 IRISH CREEK IA (SR 151) 240 240 969.1 968.2 969.9 969.0 970.5 969.7 971.1 970.4 IB 640 640 969.1 968.2 969.9 969.0 970.5 969.7 971.1 970.4 1C 1,380 1,380 969.1 968.2 969.9 969.0 970.5 969.7 971.1 970.4 Figure 9 In its original form, figure 9 consisted of 11 oversized plates (9a-9k). For purposes of microfilming and reproduction, each plate has been subdivided into three page-size sections. Figures 9A1, 9A2, and 9A3, for example, represent the left, middle, and right sections of the original figure 9A. Begin proiect station 262 plus 35 Proposed State Route 15 Figure 9A1 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. Bowerston 3in the OHIO MENT OF TRANSPORTATION Figure 9A2 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. EXPLANATION 1OO-year flood area, existing condition Study area v Cross section cc 1OO-foot stations for proposed highway See figure 2 for location AND LOUIS RAILROAD qr- Figure 9A3 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 50 Figure 9B1 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 51 0 100 200 400 600 FEET I l l l I l i l I State Route 151 Proposed State Route 151 RAILROAD RAILROAD Figure 9B2 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. .375 ,380 EXPLANATION BH 100-year flood area, existing condition Boundary of 100-year flood,modified condition W Cross section -f3-7-0-100-foot stations for proposed highway See figure 2 for location 4 Base from the OHIO DEPARTMENT OF TRANSPORTATION Figure 9B3 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 53 Figure 9C1 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 100 200 400 600 FEET I , I i I Figure 9C2 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. EXPLANATION D 100-year flood area, existing condition Boundary of 100-year flood , modified condition Cross section ,400 100-foot stations for proposed highway Base from the OHIO DEPARTMENT See figure for location OF TRANSPORTATION Figure 9C3 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. Base from the OHIO DEPARTMENT Of TRANSPORTATION Figure 9D1 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 51 EXPLANATION Cross section lOO-year flood area, existing condition lOO-foot stations for proposed highway Boundary of 100-year flood, modified condition See figure 2 for location Figure 9D2 Inundation of Conotton Creek and its tributaries by lOO-year flood under existing and modified conditions. 0 100 200 400 600 FEET i ! , i J Figure 9D3 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. EXPLANATION OHIO -/study area 1OO-year flood area, existing condition Boundary off lOO-year flood, modified condition 520 100-foot stations for proposed highway Cross section See figure 2 for location 0 100 200 400 600 FEET I < i i I I i i I Figure 9E1 - - Inundation of Conotton Creek and its tributaries by lOO-year flood under existing and modified conditions. GO Figure 9E2 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. <0\ Baso from the OHIO DEPARTMENT OF TRANSPORTATION Figure 9E3 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. Figure 9F1 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. EXPLANATION Boundary of 100-y«ar flood, modified condition 100-foot stations for proposed highway 100-y«ar flood ar«a, xlsting condition Cross section S«« figur* for location Figure 9F2 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. Base from the OHIO DEPARTMENT OF TRANSPORTATION Figure 9F3 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. n u <*£'' o U a Li- \ 0 100 200 400 600 I I I I I I I Base from the OHIO DEPARTMENT OF TRANSPORTATION Figure 9G1 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. EXPLANATION vv Cross ctlon 10O-y«ar flood, existing condition 100-foot stations for proposed highway Boundary off 1OO-y«ar flood, modified condition S«« ffigura 2 for location Figure 9G2 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. (ol Figure 9G3 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. Base from the OHIO DEPARTMENT OF TRANSPORTATION Figure 9H1 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 100 200 400 Figure 9H2 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 10 EXPLANATION - Boundary of 1OO- year flood, modified condition +^Q- 100-foot stations for proposed highway LJ lOO-year flood area, existing condition \B? Cross section 600 FEET See figure 2 for location Figure 9H3 Inundation of Conotton Creek and its tributaries by lOO-year flood under existing and modified conditions. Figure 911 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. iz EXPLANATION - - - Boundary of 1OO-year flood, modified condition Hi 1OO-year flood area, existing condition 415 1OO-foot stations for proposed highway Cross section 600 FEET See figure 2 for location Figure 912 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 13 OHIO o / study area Base from the OHIO DEPARTMENT OF TRANSPORTATION Figure 913 inundation of Conotton Creek and its tributaries fl°°d ^'^ eXlStin and "<* EXPLANATION ~~ ~Boundary of 100-year flood, modified condition LJ 100-year flood area , existing condition Study vv Cross section area 530 100-foot stations for proposed highway See figure 2 for location Base from the OHIO DEPARTMENT OF TRANSPORTATION Figure 9J1 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 15 Figure 9J2 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. Figure 9J3 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 11 BLANK (No mapped features of any significance) Figure 9K1 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. Figure 9K2 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. Study area EXPLANATION ~~~~ - 1 Boundary of lOO-year flood, modified condition lOO-year flood area, existing condition lOO-foot stations for proposed highway Cross section See figure 2 for location 0 200 400 600 FEET 1 i i i 1 i 1 i 1 i 1 i 1 Figure 9K3 Inundation of Conotton Creek and its tributaries by 100-year flood under existing and modified conditions. 'SO 3 »* ^o 2« 2 ~ 0 o'^ oo o. 1^ J* 3 _ 30o « A* " 2 .1 a oi 0) M ? * S o 2 o s aj a z o o o & * i s ~ oS ~~ r *** &i i o 1 1 i o o ELEVATION ABOVE NATIONAL GEODETIC VERTICAL DATUM OF 1929, IN FEET