Stormwater Management Study Lake DeNeveu Fond du Lac County, Wisconsin Prepared For
FOND DU LAC COUNTY, WISCONSIN
AUGUST 18, 2017 McM. No. F0983-9-17-00160.02 NAV/JDH:
Stormwater Management Study Lake DeNeveu
Fond du Lac County, Wisconsin
Prepared For
FOND DU LAC COUNTY, WISCONSIN AUGUST 18, 2017 McM. No. F0983-9-17-00160.02
TABLE OF CONTENTS I. INTRODUCTION II.
STUDY AREA
III.
HYDROLOGIC & HYDRAULIC ANALYSIS
IV.
WATER QUALITY ANALYSIS
V.
ALTERNATIVES ANALYSIS
VI.
SUMMARY
ID;W:\PROJECTS\F0983\91700160\Documents\Reports\Stormwater Study\LakeDeNeveuSWStudy (NAV).docx
Stormwater Management Study Lake DeNeveu Fond du Lac County, Wisconsin
Prepared For
FOND DU LAC COUNTY, WISCONSIN AUGUST 18, 2017 McM. No. F0983-9-17-00160.02
I.
INTRODUCTION
Fond du Lac County retained McMahon Associates, Inc. (McMAHON) to evaluate stormwater runoff and identify implementation strategies to mitigate flooding concerns along the northeast shore of Lake DeNeveu. Lake DeNeveu is an 80 acre lake located along USH 45 in the Town of Empire. The lake shoreline is developed with residential homes and cottages, except the south portion which is wetlands and woodlands. Exhibit 1 depicts recent flooding of private property at the northeast corner of the lake, just downstream of the northern most USH 45 culvert.
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Exhibit 1 – Flooding Downstream of USH 45 Culvert
Source: www.lakedeneveu.com
During 2018, the Wisconsin Department of Transportation (WisDOT) plans to resurface USH 45 between the City of Fond du Lac and Village of Eden, which includes the portion of USH 45 located east of Lake DeNeveu. The proposed resurfacing project does not widen the pavement or realign the highway, except at the intersection of CTH H and USH 45, which is being realigned in order to improve public safety and function. As part of the project, the WisDOT plans to replace culvert crossings along USH 45, which is a rural highway. On behalf of the Town of Empire, the East Central Wisconsin Regional Planning Commission (ECWRPC) prepared a report to assist with assessing the causes and potential strategies for flooding improvements along the northeast shore of Lake DeNeveu. The report summarizes the issues and identifies some potential flood mitigation strategies to consider for the watershed. ECWRPC did not evaluate the flooding concerns, water quality concerns, or potential flood mitigation strategies. The ECWRPC report is titled “Lake DeNeveu Drainage Study and Action Plan” and is dated July 2015. The purpose of this stormwater management study is to evaluate the feasibility and effectiveness of strategies identified in the ECWRPC report, including other strategies not identified in the ECWRPC report. The ECWRPC report identifies three (3) strategies: infrastructure and mitigation, watershed restoration, and policy / planning practices. Fond du Lac County desires that McMAHON’s scope of recommendations be limited to flood and runoff mitigation at the northeast side of the lake. When evaluating the strategies, the County wants McMAHON to consider the ability to permit and receive approval for the projects. To assist with the study, Fond du Lac County assembled a stakeholder group to assist with information gathering, observations, perspectives, expertise, and public input. The stakeholder group includes representatives from Fond du Lac County, Town of Empire, Wisconsin
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Department of Natural Resources (DNR), WisDOT, Lake DeNeveu Association, and McMAHON. The stakeholder group includes the following individuals: Allen Buechel, County Executive – Fond du Lac County Erin Gerred, Director of Administration – Fond du Lac County Paul Tollard, County Conservationist – Fond du Lac County LWCD Fred Christ, Board Member – Lake DeNeveu Association Mary Toriello, Board Member – Lake DeNeveu Association Bryan Learst, Project Manager – WisDOT David Bolha, Water Resources Management Specialist – DNR Heidi Bunk, Water Resources Management Specialist – DNR Jared Seidl, Water Regulations and Zoning Specialist – DNR Jay Schiefelbein, Env. Analysis and Review Specialist – DNR Rob McLennan, NR Basin Supervisor – DNR Joe Hoechst, Project Engineer – McMAHON Nick Vande Hey, Project Manager – McMAHON
II.
STUDY AREA
Figure 1 depicts the study area and watershed draining into Lake DeNeveu. The study area contains 649.6 acres or 1.02 square miles of property. A. Lake DeNeveu The DNR identifies Lake DeNeveu as a seepage lake. While a seepage lake typically does not have an outlet, Lake DeNeveu is drained by an unnamed tributary to DeNeveu Creek, which is located on the west side of the lake. As shown in Exhibit 2, the lake has a maximum depth of 67 feet.
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Exhibit 2 – Lake DeNeveu Bathymetric Map
Source: Wisconsin DNR
B.
The DNR indicates the lake bottom consists of 30% sand, 20% gravel, 0% rock, and 50% muck. Fish within Lake DeNeveu include Panfish (abundant), Largemouth Bass (common), Northern Pike (present), and Walleye (present). Navigable Streams McMAHON requested a navigability determination from DNR for waterways draining into and out of Lake DeNeveu. Exhibit 3 depicts the navigability map provided by the DNR. In Exhibit 3, the blue waterway segments are navigable streams and the red waterway segments are not navigable streams. DNR navigability determinations are typically valid for five (5) years.
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Exhibit 3 – Navigable Streams
Source: DNR (2017)
C.
Historic Drainage Patterns As part of the study, available documents were gathered to evaluate historical drainage patterns within the watershed. Documents included aerial photographs, United States Geological Survey (USGS) maps, DNR maps, WisDOT highway plans, County highway plans, and subdivision plans. Determining the historic stream channel alignment at the northeast corner of Lake DeNeveu was of particular interest to stakeholders. Below is a chronology of documents and associated observations. 1937 – Figure 6 depicts a 1937 photograph. Based on the 1937 photograph, a road surface is located within the USH 45 and CTH H right‐of‐ways, no road surface is located within the Ledgetop Drive and Overland Trail right‐of‐ways, very few residential homes are located along the east shore of Lake DeNeveu, no gravel pit is located along Ledgetop Drive, and an east‐west farmstead driveway is located just east of the USH 45 and Reinhardt Road intersection. 1944 – Exhibit 4 depicts the WisDOT highway plans for USH 45, which are dated 1944. Based on the highway plans, an existing USH 45 cross culvert is located at station 170+69 (yellow circle), which is about 400 feet southeast of the USH 45 and Reinhardt Road intersection. At this location, a 36‐inch diameter corrugated culvert Stormwater Management Study
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with a 16 foot length was identified for removal on the plans. The 36‐inch culvert was replaced with a 6 foot by 4 foot concrete culvert with a 30 foot length. The USH 45 plans indicate the stream passing through the USH 45 culvert at station 170+69 flows to Lake DeNeveu. The USH 45 plans also indicate an east‐west farmstead driveway is located just east of the USH 45 and Reinhardt Road intersection. Exhibit 4 – USH 45 Plans (1944)
Source: WisDOT (1944)
Based on the highway plans, an existing USH 45 cross culvert was located at station 187+18, which is about 2,000 feet southeast of the USH 45 and Reinhardt Road intersection. The 14‐inch diameter corrugated culvert is shown to be eliminated, such that runoff flows along the highway ditch to station 170+69. Based on the highway plans, an existing USH 45 cross culvert is located at station 193+64, which is about 2,700 feet southeast of the USH 45 and Reinhardt Road intersection. The 12‐inch diameter corrugated culvert is identified for removal and replacement with a 2 foot by 2 foot concrete culvert with a 28 foot length. Based on the highway plans, a new USH 45 cross culvert is proposed at station 204+50, which is about 3,800 feet southeast of the USH 45 and Reinhardt Road intersection. The culvert is a 2 foot by 2 foot concrete culvert with a 28 foot length. 1972 – Figure 5 depicts a 1972 photograph. Based on the 1972 photograph, no road surface is located within the Overland Trail right‐of‐way, a road is located within the south portion of the Ledgetop Drive right‐of‐way, a gravel pit is located north of the houses along Ledgetop Drive, many residential homes are now located along the east shore of Lake DeNeveu, and an east‐west farmstead driveway is located just east of the USH 45 and Reinhardt Road intersection (same driveway as 1937 photo). Stormwater Management Study
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1974 – Exhibit 5 depicts the 1974 USGS map. Based on the map, the northeast waterway flows north across the farmstead driveway and into Devils Lake, rather than through the USH 45 culvert and into Lake DeNeveu. A gravel pit is depicted.
Exhibit 5 – USGS Quadrangle Map (1974)
Source: USGS (1974)
1978 – Exhibit 6 depicts the preliminary plat for the Overland Heights Subdivision. Based on the preliminary plat, the ground elevations to the south of the farmstead driveway are ± 1.5 feet higher than the adjacent driveway in 1978. The ground elevations also indicate a swale paralleled the south side of the farmstead driveway. No farmstead driveway culverts are shown on the preliminary plat.
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Exhibit 6 – Overland Heights Preliminary Plat (1978)
Source: Fond du Lac County (1978)
1990 – Figure 4 depicts a 1990 photograph. Based on the 1990 photograph, a road surface is located within the Overland Trail and Ledgetop Drive right‐of‐ways. A pond is located within the former gravel pit along Ledgetop Drive. Low areas are visible within the cropland that is located east of Ledgetop Drive. 2000 – Figure 3 depicts a 2000 photograph. Based on the 2000 photograph, a road surface is located along the cul de sac associated with the Overland Trail right‐of‐ way, including new residences. In addition, a new residential driveway and home are located east of the USH 45 and Reinhardt Road intersection. Low areas are visible within the cropland that is located east of Ledgetop Drive.
2010 – Figure 2 depicts a 2010 photograph. Based on the 2010 photograph, a road surface is located along the Lac Vue Court right‐of‐way, including new residences. In addition, a new residential home is located along the east side of Ledgetop Drive, just south of the pond. Low areas are visible within the cropland that is located east of Ledgetop Drive.
2015 – Exhibit 7 depicts the 2015 USGS map. Based on the map, the waterway at the northeast corner of Lake DeNeveu flows north across a residential driveway and into Devils Lake, rather than through the USH 45 culvert and into Lake DeNeveu.
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Exhibit 7 – USGS Quadrangle Map (2015)
Source: USGS
Based on the above chronology, it is McMAHON’s opinion that the stream at the northeast corner of Lake DeNeveu is not depicted correctly on the 1974 and 2015 USGS maps. It is McMAHON’s opinion that the USH 45 plans clearly indicate that a large cross culvert was removed and replaced at station 170+69 in 1944 and that the stream flowed through the USH 45 culvert to Lake DeNeveu, rather than to Devils Lake. Also, stakeholders agree that the northeast stream flowed through the USH 45 culvert to Lake DeNeveu during 2015, despite being depicted on the 2015 USGS map as flowing to Devils Lake. In other communities, McMAHON has observed streams incorrectly depicted on USGS maps as well. D.
Watershed 1972 was selected as the historical point of reference for this study. The 1972 drainage areas are based on the 1972 aerial photograph and the contours provided on 1974 USGS quadrangle map. The drainage areas for DeNeveu Creek are based on the Total Maximum Daily Load (TMDL) sub‐basin boundary provided by the DNR. The 1972 drainage areas are depicted in Figure 7. 2015 was selected as the current condition for this study. Within the study area, the 2015 drainage areas are based on the LiDAR contours provided by Fond du Lac County. The drainage areas for DeNeveu Creek are based on the Total Maximum Daily Load (TMDL) sub‐basin boundary provided by the DNR. The 2015 drainage areas are depicted in Figure 8.
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Culverts currently located within the watershed are depicted in Figure 8. More detailed information for six of these culverts is summarized in Table 1. The Table 1 information was derived from field observations, LiDAR, and available plans. About 1 foot sediment has accumulated in Culvert CV‐D2a since 1944. Culvert ID CV‐D2a CV‐D2b CV‐D2d CV‐D3 CV‐D4 CV‐D5 E.
Location USH 45 Ledgetop Dr Ledgetop Dr USH 45 USH 45 USH 45
Table 1 – Culverts Culvert Culvert Top Road Size Material Elev. (ft) 6'x3' Conc. Box 887.5 24" CMP 1021.2 36" CMP 1035.7 30" CMP 953.5 24" CMP 964.5 30" CMP 975.8
US Invert DS Invert Elev. (ft) Elev. (ft) 881.0 880.5 1015.8 1015.0 1020.8 1019.5 950.8 950.0 961.0 960.8 970.0 968.0
Soils Soil information was obtained from the U.S. Department of Agriculture, National Resource Conservation Service (NRCS) Soil Survey. NRCS hydrologic soil groups are depicted in Figure 9. Soils within the study area are summarized in Table 2. The NRCS has classified soil types into four (4) Hydrologic Soil Groups (HSG). The four (4) hydrologic soil groups (i.e. A, B, C, and D) are classified according to the minimum infiltration rate of the soil column. Group A soils have the highest infiltration rate or lowest runoff potential, whereas Group D soils have the lowest infiltration rate or highest runoff potential.
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Soil Name Adrian Ashkum Beecher Brookston Dodge ‐ Hochheim Hochheim Hochheim Hochheim Hochheim Houghton Juneau Knowles Knowles Lamartine Mayville Morley Morley Morley Morley Morley Palms St. Charles Theresa Theresa Theresa Theresa Theresa Theresa Virgil ‐ Total
Table 2 – NRCS Soil Information Soil Map Area Soil Texture HSG Symbol (acres) Ak Mucky peat D 22.7 AtA Silty clay loam D 8.0 BcB Silt loam D 75.3 BsA Silt loam D 1.2 DdB Silt loam C 17.2 GP Gravel pit C 4.6 HmC2 Loam D 11.5 HmD2 Loam D 1.1 HoC3 Soils B 6.3 HoD3 Soils B 12.2 HoE3 Soils B 1.6 Hu Mucky peat D 18.0 JuA Silt loam D 1.3 KwC2 Silt loam C 5.4 KwE2 Silt loam C 3.5 LmB Silt loam B 8.4 MoB Silt loam C 11.6 MzdB Silt loam C 31.5 MzdB2 Silt loam C 32.7 MzdC2 Silt loam C 5.6 MzdD2 Silt loam C 51.0 MzeD3 Soils C 28.9 Pc Mucky peat D 2.4 ScA Silt loam B 12.0 ThB Silt loam C 37.3 ThB2 Silt loam C 72.8 ThC Silt loam C 10.2 ThC2 Silt loam C 58.6 ThD2 Silt loam C 2.9 TrD3 Soils C 1.8 VgA Silt loam D 11.4 W Water D 80.6 649.6
Percent of Study Area (%) 3.5% 1.2% 11.6% 0.2% 2.7% 0.7% 1.8% 0.2% 1.0% 1.9% 0.3% 2.8% 0.2% 0.8% 0.5% 1.3% 1.8% 4.9% 5.0% 0.9% 7.9% 4.5% 0.4% 1.9% 5.7% 11.2% 1.6% 9.0% 0.5% 0.3% 1.8% 12.4% 100.0%
F.
Land Uses Land uses, impervious surfaces (i.e. roofs, driveways, roads, etc.), vegetation, and soil compaction can influence flooding, infiltration volumes, runoff volumes, peak discharge rates, and water quality. For example, the addition of impervious surfaces can reduce infiltration into underlying soils and increase runoff volume. Similar hydrologic changes Stormwater Management Study
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occur when woodlands or wetlands are converted to agriculture or if soils are compacted as compared to historic levels. Exhibit 8 identifies some of these land use changes, such as new subdivisions. Exhibit 8 – Subdivision Plats (1965‐2004)
Source: ECWRPC
Although multiple options existed, year 1972 was selected as the historical point of reference for this study. Year 1972 was selected due to the availability of a good quality aerial photograph that was close in date to the 1974 USGS map, which provided contours. The 1972 land uses are depicted in Figure 10 and summarized in Table 3.
Land Uses Agriculture Commercial Farmstead Grass Road / Highway Residential Water Wetlands Woods Total
Table 3 – Land Uses 1972 (acres) 239.7 2.5 10.2 115.3 19.9 61.1 87.7 32.5 76.5 645.4
2015 (acres) 168.2 2.5 18.6 62.6 30.9 162.9 87.9 32.4 83.6 649.6
Change (%) ‐30% 0% 82% ‐46% 55% 167% 0% 0% 9% 1%
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2015 was selected as the current condition for this study. Within the study area, the 2015 land uses are based on the most recent aerial photograph from Fond du Lac County. The 2015 land uses are depicted in Figure 11 and summarized in Table 3. As shown Table 3, the residential, farmstead, and road land uses increased by 167, 82, and 55 percent, respectively. Grass and agriculture land uses decreased by 46 and 30 percent, respectively. These land use changes increased the amount of impervious surface within the Lake DeNeveu watershed. The Town of Empire adopted a new Comprehensive Plan in 2007. According to the plan, the majority of land uses within the study area are to remain unchanged in the future. G.
FEMA 100‐Year Floodplain As shown in Exhibit 9, the Federal Emergency Management Agency (FEMA) mapped a 100‐year floodplain for Lake DeNeveu, including the stream located west of Lake DeNeveu. No regulatory 100‐year floodplain is mapped along the streams located east of Lake DeNeveu. Exhibit 9 – FEMA 100‐Year Floodplain
Source: FEMA
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H.
Proposed USH 45 Plans The WisDOT intends to resurface USH 45 between the City of Fond du Lac and Village of Eden. The proposed project does not widen the pavement or alignment of the highway, but the intersection of CTH H and USH 45 is to be realigned in order to improve public safety and function. This work by the WisDOT is planned for construction during 2018. Exhibit 10 indicates the existing 6’x3’ concrete box culvert (18 square feet) along USH 45 is to be removed and replaced with a 48‐inch reinforced concrete culvert (12.5 square feet). As indicated in Exhibit 4, the 1944 highway plans indicate this existing culvert is a 6’x4’ concrete box culvert (24 square feet). The proposed 48‐inch culvert is 30% smaller than the 6’x3’ concrete box culvert and 48% smaller than the 6’x4’ concrete box culvert. Exhibit 10 – USH 45 Upgrades
Source: WisDOT Plans Stormwater Management Study Lake DeNeveu FOND DU LAC COUNTY | Fond du Lac County, Wisconsin
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Exhibit 11 – USH 45 Upgrades
Source: WisDOT Plans I.
Groundwater & Bedrock Groundwater interacts with surface water within the study area. An existing spring‐fed pond is located at the top of the escarpment, just east of Ledgetop Drive. Based on stakeholder observations, this spring provides a small, but constant flow of water into the northeast stream. In addition, stakeholders indicated numerous springs and seeps emanate from the bedrock along the Niagara Escarpment. Exhibit 12 depicts areas where groundwater is within 2 feet of the ground surface and bedrock is within 5 feet of the ground surface. No drain tile information is available for the study area. Stormwater Management Study
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Exhibit 12 – Depth to Groundwater & Bedrock
Source: ECWRPC
J.
Groundwater Susceptibility In order to help identify areas sensitive to groundwater contamination, the DNR developed a composite Groundwater Contamination Susceptibility Map, which is depicted in Exhibit 13. The map can be used to determine potential groundwater problems. The map doesn’t show areas that will be contaminated, or areas that cannot be contaminated. Susceptibility of groundwater to pollutants is defined here as the ease with which a contaminant can be transported from the land surface to the top of the groundwater table. Many materials that overlie the groundwater offer good protection from contaminants that might be transported by infiltrating waters. The amount of protection offered by the overlying material varies, however, depending on the materials. Thus, in some areas, the overlying soil and bedrock materials allow contaminants to reach the groundwater more easily than in other areas. Stormwater Management Study
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Exhibit 13 – Groundwater Contamination Susceptibility Map for Fond du Lac County
Source: Protecting Wisconsin's Gro undwater Through Comprehensive Planning
Exhibit 14 identifies residential properties served by public sanitary sewers within the Empire Sanitary District #1. Residential properties located east of USH 45 appear to be served by private septic systems. Exhibit 14 – Empire Sanitary District #1 Sanitary Sewer Service Area
Source: Fond du Lac County GIS
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K.
Surface Water Quality The East Branch of DeNeveu Creek is currently a 303(d) listed water body through the Clean Water Act. The East Branch of DeNeveu Creek is impaired by elevated water temperature and degraded habitat and the pollutant of concern is total phosphorus. Based on information from the DNR, DeNeveu Creek is proposed for 303(d) listing due to excess total phosphorus. The DNR is currently developing a Total Maximum Daily Load (TMDL) for the Upper Fox River Basin to address excess total phosphorus and total suspended solids within DeNeveu Creek, East Branch of DeNeveu Creek, Lake Winnebago, and other water bodies located within the Upper Fox River Basin. The DeNeveu Lake Association and DNR have been monitoring water quality within Lake DeNeveu for the past seven (7) to nine (9) years. Exhibit 15 summarizes the DeNeveu Lake Association’s phosphorus sampling results for the northeast stream at the USH 45 culvert crossing. Exhibit 15 – Lake DeNeveu Water Quality
Source: Lake DeNeveu Association (www.lakedeneveu.com)
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III.
HYDROLOGIC & HYDRAULIC ANALYSIS
A.
Methodology The hydrologic and hydraulic analysis was performed using XP’s Stormwater Management Model (XP‐SWMM version 18.1). XP‐SWMM is a dynamic computer program capable of modeling complex watersheds and stormwater conveyance systems. The XP‐SWMM runoff module and the U.S. Department of Agriculture, Natural Resource Conservation Service (NRCS) Technical Release 55 hydrologic method were used to simulate the rainfall ‐ runoff process. The TR‐55 methodology requires that various hydrologic parameters be developed for each drainage area. These hydrologic parameters include drainage area size, runoff curve number, and time of concentration. Runoff hydrographs were developed for each drainage area. The hydrographs include information such as peak flow rates, time of peak flow rates, and runoff volumes. The XP‐SWMM hydraulics module was used to combine, split, and route each runoff hydrograph through the stormwater conveyance system. The stormwater conveyance system is comprised of a network of streams, ditches, culverts, overland flow paths, and detention facilities. Combined, the individual components convey surface runoff through the stormwater conveyance system.
B.
Rainfall Rainfall information was obtained from Chapter 2 of the USDA Natural Resources Conservation Service (NRCS) Engineering Field Handbook Notice 210‐WI‐132, “Estimating Runoff and Peak Discharges” and represents a mean rainfall depth for Fond du Lac County. The 24‐hour rainfall depths are summarized in Table 4. The NRCS 24‐ hour, MSE4 rainfall distribution was used for this study. Table 4 – 24‐Hour Rainfall Depth Rainfall Event Rainfall Depth (inches) 2‐Year 2.55 10‐Year 3.69 100‐Year 6.16 Runoff Curve Number
C.
A composite runoff curve number was computed for each drainage area and land use condition. Runoff curve number computations were based on land uses, vegetation, percent imperviousness, and hydrologic soil groups. For this study, the following assumptions were used to compute composite runoff curve numbers: average antecedent moisture condition, average runoff condition, good hydrologic condition for pervious areas, and directly connected impervious areas. Impervious areas were assumed to have a curve number of 98 and pervious grass areas were assumed to have Stormwater Management Study Lake DeNeveu FOND DU LAC COUNTY | Fond du Lac County, Wisconsin
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a curve number of 74 (HSG C). Curve numbers for the agriculture land use were determined based upon a seven year dairy crop rotation. The runoff curve numbers (RCN) for each drainage area and land use condition are summarized in Table 5. D.
Time of Concentration Times of concentrations were computed for each drainage area and land use condition. Time of concentration is defined as the time it takes runoff to travel from the hydraulically most distant point of the drainage area to a downslope point of interest. Time of concentration calculations are typically comprised of three (3) segments or flow regimes: sheet flow, shallow concentrated flow, and open channel flow. The time of concentration influences the shape and peak flow rate of the drainage area’s runoff hydrograph. The time of concentrations (Tc) for each drainage area and land use condition are summarized in Table 5.
E.
Hydrologic Parameters The hydrologic parameters for each drainage area and land use condition are summarized in Table 5. As shown in Table 5, the 2015 study area is 4.2 acres larger than the 1972 study area, which is a result of drainage area changes along Overland Trail.
Table 5 – Hydrologic Parameters 1972 Land Use 2015 Land Use Drainage Area Tc Area Tc Area ID (acres) RCN (min) (acres) RCN (min) D1 347.2 83 121 347.2 84 121 D2a 107.5 79 65 57.6 75 44 D2b 20.6 77 30 74.8 80 57 D2c 51.8 82 53 51.8 81 53 D2d 32.4 82 40 32.4 81 40 D2e 31.1 83 33 31.1 82 33 D3 28.5 80 23 28.5 74 23 D4 4.6 80 25 4.6 82 25 D5 21.7 75 37 21.7 79 37 Study Area 645.4 649.6 N1 5,665.6 81 1,140 5,665.6 81 1,140 N2 62.8 83 69 62.8 83 69 V1a 85.2 77 45 85.2 77 45 V1b 63.3 76 47 63.3 76 47
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F.
Peak Water Surface Elevation Results The 1972 peak water surface elevations are based on the 1972 hydrologic parameters and the 1972 hydraulic conveyance system. The upstream (US) peak water surface elevations for the 1972 condition are summarized in Table 6. For reference, the points of interest and flooding limits associated with Table 6 are depicted in Figure 12.
Table 6 – Peak Water Surface Elevations (1972 Condition) Point of US Culvert Overland US Peak Water Elev. (ft) Interest Location Elev. (ft) Elev. (ft) 2‐Year 10‐Year 100‐Year 1 Reinhardt Rd. 815.7 827.0 820.6 821.8 822.7 2 CTH K 832.3 845.8 833.6 834.0 834.6 3 Lake DeNeveu ‐ ‐ 862.6 863.0 864.0 4 USH 45 881.0 886.0 884.1 887.0 887.4 5 Ledgetop Dr. ‐ ‐ 1009.6 1010.0 1010.5 6 Low Area ‐ 1062.5 1063.1 1063.4 1063.8 7 Ledgetop Dr. 1020.8 1034.0 1022.4 1024.4 1029.7 8 Low Area ‐ 1051.5 1051.7 1051.9 1052.2 9 USH 45 950.8 953.5 953.3 953.4 953.6 10 USH 45 961.0 963.0 962.0 962.4 963.8 11 USH 45 970.0 976.3 971.4 972.6 974.5 12 Devils Lake ‐ 850.0 845.9 848.0 850.2 The 2015 peak water surface elevations are based on the 2015 hydrologic parameters and the 2015 hydraulic conveyance system. The upstream peak water surface elevations for the 2015 condition are summarized in Table 7. For reference, the points of interest and flooding limits associated with Table 7 are depicted in Figure 13.
Point of Interest 1 2 3 4 5 6 7 8 9 10 11 12
Table 7 – Peak Water Surface Elevations (2015 Condition) US Culvert Overland Peak Water Surface Elev. (ft) Location Elev. (ft) Elev. (ft) 2‐Year 10‐Year 100‐Year Reinhardt Rd. 815.7 827.0 820.6 821.8 822.7 CTH K 832.3 845.8 833.6 834.0 834.6 Lake DeNeveu ‐ ‐ 862.6 863.1 864.1 USH 45 881.0 886.0 883.3 886.6 887.4 Ledgetop Dr. ‐ 1021.2 1020.9 1021.7 1022.2 Low Area ‐ 1062.5 1063.1 1063.4 1063.8 Ledgetop Dr. 1020.8 1034.0 1022.2 1024.2 1029.6 Low Area ‐ 1051.5 1051.7 1051.9 1052.2 USH 45 950.8 953.5 952.6 953.4 953.5 USH 45 961.0 963.0 962.0 962.5 963.8 USH 45 970.0 976.3 971.7 973.1 974.5 Devils Lake ‐ 850.0 845.9 848.0 850.2 Stormwater Management Study
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G.
Peak Discharge Results The 1972 peak discharges are based on the 1972 hydrologic parameters and the 1972 hydraulic conveyance system. Similarly, the 2015 peak discharges are based on the 2015 hydrologic parameters and the 2015 hydraulic conveyance system. A comparison of downstream peak discharges for the 1972 and 2015 conditions are summarized in Table 8. For reference, the points of interest and flooding limits associated with Table 8 are depicted in Figures 12 and 13.
Table 8 – Peak Discharge Comparison (1972 vs. 2015) Point of 1972 Peak Discharge (cfs) 2015 Peak Discharge (cfs) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 1 Reinhardt Rd. 282 559 1,254 282 559 1,255 2 CTH K 31 60 127 31 60 127 3 Lake DeNeveu 1 6 26 1 6 27 4 USH 45 84 169 360 56 125 361 5 Ledgetop Dr. 11 25 60 30 76 266 6 Low Area 19 43 99 17 41 96 7 Ledgetop Dr. 25 66 97 21 63 97 8 Low Area 12 31 51 10 30 50 9 USH 45 23 47 104 14 35 88 10 USH 45 4 7 16 4 8 17 11 USH 45 9 21 53 12 26 59 12 Devils Lake 0 0 32 0 0 18 H.
Peak Velocity Results The 1972 peak stream velocities are based on the 1972 hydrologic parameters and the 1972 hydraulic conveyance system. Similarly, the 2015 peak velocities are based on the 2015 hydrologic parameters and the 2015 hydraulic conveyance system. A comparison of downstream peak velocities for the 1972 and 2015 conditions are summarized in Table 9. For reference, the points of interest and flooding limits associated with Table 9 are depicted in Figures 12 and 13.
Table 9 – Peak Stream Velocity Comparison (1972 vs. 2015) Point of 1972 Peak Velocity (fps) 2015 Peak Velocity (fps) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 1 Reinhardt Rd. 1.6 2.1 3.1 1.6 2.1 3.1 2 CTH K 2.8 2.9 3.6 2.8 2.9 3.6 4 USH 45 5.3 6.6 8.7 4.6 6.0 8.7
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I.
Peak Storage Volume Results The 1972 peak storage volumes are based on the 1972 hydrologic parameters and the 1972 hydraulic conveyance system. Similarly, the 2015 peak storage volumes are based on the 2015 hydrologic parameters and the 2015 hydraulic conveyance system. A comparison of upstream peak storage volumes for the 1972 and 2015 conditions are summarized in Table 10. For reference, the points of interest and flooding limits associated with Table 10 are depicted in Figures 12 and 13.
Table 10 – Peak Storage Volume Comparison (1972 vs. 2015) Point of 1972 Storage Vol. (ac‐ft) 2015 Storage Vol. (ac‐ft) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 3 Lake DeNeveu 48.9 90.6 184.9 49.7 93.1 186.8 5 Ledgetop Dr. ‐ ‐ ‐ 2.1 4.7 6.4 6 Low Area 1.1 1.8 3.2 1.1 1.8 3.2 8 Low Area 1.1 1.4 2.0 1.0 1.4 2.0 J.
Results Comparison (1972 vs. 2015) Below are a few observations when comparing the 1972 and 2015 results: At Point of Interest 4, the 2‐year and 10‐year peak discharges are lower during 2015, as compared to 1972, due to construction of the pond along the east side of Ledgetop Drive. The 100‐year peak discharge is essentially unchanged at this location since the Ledgetop Drive road surface is overtopped during the 100‐year rainfall event. At Point of Interest 9, the 2‐year, 10‐year and 100‐year peak discharges are lower during 2015, as compared to 1972, due to conversion of cropland to grassland within Drainage Area D3.
IV.
WATER QUALITY ANALYSIS
A.
Methodology The SNAP‐Plus (Soil Nutrient Application Planner) software was used to evaluate phosphorus reductions for cropland best management practices (BMPs). The SNAP‐Plus software is used by cropland producers to manage nutrients, particularly as it relates to manure and fertilizer applications. SNAP‐Plus is also used to estimate potential phosphorus discharges associated with surface runoff and evaluate phosphorus reduction benefits of BMPs such as tillage (conventional, mulch till, zone till, and no till) and cover crops. Stormwater Management Study
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V.
ALTERNATIVES ANALYSIS For this Lake DeNeveu study, three (3) stormwater alternatives were evaluated with computer models. The three (3) alternatives were selected after considering Fond du Lac County goals, stakeholder concerns, implementation costs, and the feasibility of obtaining regulatory permits. Other alternatives were considered for the study, but were not modeled. Each of the three (3) alternatives is summarized herein, including modeling results. A. Alternative 1 Alternative 1 is depicted in Figure 14. Alternative 1 consists of 3,600 feet of 54‐inch storm sewer along Reinhardt Road. The 54‐inch storm sewer is a high flow by‐pass for the stream located at the northeast corner of Lake DeNeveu. At USH 45, high stream flows are diverted into the 54‐inch storm sewer and then discharged into the Reinhardt Road stream crossing, which is located 1,400 feet west of CTH K. Low stream flows are to continue through the USH 45 culvert crossing, which is a navigable stream based on Exhibit 3. Maintaining low flows in the stream channel will likely be a DNR Chapter 30 Permit requirement. The 54‐inch storm sewer is proposed to be 1 foot higher than the stream bed elevation on the east side of the USH 45 culvert and then drop several feet into a storm manhole. Along Reinhardt Road, the 54‐inch storm sewer is anticipated to be about 8 feet below the ditch bottom. Alternative 1 also includes 1,700 linear feet of 24‐inch storm sewer along USH 45, between culvert CV‐D2a and culvert CV‐D3. The 24‐ inch storm sewer is designed to convey stormwater runoff to the 54‐inch storm sewer. Lastly, Alternative 1 assumes cropland located within the study area (168 acres) is converted from conventional tillage to mulch tillage with cover crops. Table 11 summarizes peak water surfaces elevations for Alternative 1.
Table 11 – Peak Water Surface Elevations (Alternative 1) Point of US Culvert Overland Peak Water Surface Elev. (ft) Interest Location Elev. (ft) Elev. (ft) 2‐Year 10‐Year 100‐Year 1 Reinhardt Rd. 815.7 827.0 820.6 821.8 822.7 2 CTH K 832.3 845.8 833.6 834.0 834.6 3 Lake DeNeveu ‐ ‐ 862.5 862.9 863.8 4 USH 45‐D2a 881.0 886.0 882.6 883.3 886.8 5 Ledgetop‐D2b ‐ 1021.2 1020.8 1021.7 1022.2 6 Low Area ‐ 1062.5 1063.0 1063.3 1063.7 7 Ledgetop‐D2d 1020.8 1034.0 1022.1 1023.7 1029.4 8 Low Area ‐ 1051.5 1051.7 1051.9 1052.2 9 USH 45‐D3 950.8 953.5 946.5 947.0 953.4 10 USH 45‐D4 961.0 963.0 962.0 962.5 963.8 11 USH 45‐D5 970.0 976.3 971.7 973.1 974.5 12 Devils Lake ‐ 850.0 845.9 847.5 850.0 Stormwater Management Study Lake DeNeveu FOND DU LAC COUNTY | Fond du Lac County, Wisconsin
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Table 12 compares peak water surface elevations for Alternative 1 to the peak water surface elevations for the 2015 condition. As shown in Table 12, peak water elevations are lower at several locations, particularly Points of Interest 4 and 9. Point of Interest 12 is lower due to less overland flow from culvert CV‐D2a (Point of Interest 4). Also, Table 12 indicates that each 10‐year peak water surface elevation is unchanged or decreased. Table 12 – Peak Water Surface Elevation Comparison (2015 vs. Alternative 1 Point of US Culvert Overland 10‐Year Peak Water Elev. (ft) Interest Location Elev. (ft) Elev. (ft) 2015 Alt. 1 Change 1 Reinhardt Rd. 815.7 827.0 821.8 821.8 0.0 2 CTH K 832.3 845.8 834.0 834.0 0.0 3 Lake DeNeveu ‐ ‐ 863.1 862.9 ‐0.2 4 USH 45‐D2a 881.0 886.0 886.6 883.3 ‐3.3 5 Ledgetop‐D2b ‐ 1021.2 1021.7 1021.7 0.0 6 Low Area ‐ 1062.5 1063.4 1063.3 ‐0.1 7 Ledgetop‐D2d 1020.8 1034.0 1024.2 1023.7 ‐0.5 8 Low Area ‐ 1051.5 1051.9 1051.9 0.0 9 USH 45‐D3 950.8 953.5 953.4 947.0 ‐6.4 10 USH 45‐D4 961.0 963.0 962.5 962.5 0.0 11 USH 45‐D5 970.0 976.3 973.1 973.1 0.0 12 Devils Lake ‐ 850.0 848.0 847.5 ‐0.5 Table 13 compares the Alternative 1 peak discharges to the 2015 peak discharges. As shown in Table 13, the peak discharges are lower at several locations, particularly Points of Interest 4 and 9. Also, Table 13 indicates that each peak discharge is unchanged or decreased.
Table 13 – Peak Discharge Comparison (2015 vs. Alternative 1) Point of 2015 Peak Discharge (cfs) Alt. 1 Peak Discharge (cfs) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 1 Reinhardt Rd. 282 559 1,255 282 557 1,244 2 CTH K 31 60 127 31 60 127 3 Lake DeNeveu 1 6 27 1 4 16 4 USH 45‐D2a 56 125 361 33 55 181 5 Ledgetop‐D2b 30 76 266 27 66 254 6 Low Area 17 41 96 14 36 91 7 Ledgetop‐D2d 21 63 97 19 62 96 8 Low Area 10 30 50 9 28 50 9 USH 45‐D3 14 35 88 0 0 38 10 USH 45‐D4 4 8 17 4 8 17 11 USH 45‐D5 12 26 59 12 26 59 12 Devils Lake 0 0 18 0 0 0 Stormwater Management Study Lake DeNeveu FOND DU LAC COUNTY | Fond du Lac County, Wisconsin
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Table 14 compares the Alternative 1 flow velocities to the 2015 flow velocities. As shown in Table 14, the flow velocities are lower at Point of Interest 4. Also, Table 14 indicates that each peak flow velocity is unchanged or decreased.
Table 14 – Peak Stream Velocity Comparison (2015 vs. Alternative 1) Point of 2015 Peak Velocity (fps) Alt. 1 Peak Velocity (fps) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 1 Reinhardt Rd. 1.6 2.1 3.1 1.6 2.1 3.1 2 CTH K 2.8 2.9 3.6 2.8 2.8 3.6 4 USH 45‐D2a 4.6 6.0 8.7 3.7 4.3 6.5 Table 15 compares the Alternative 1 peak storage volumes to the 2015 peak storage volumes. As shown in Table 15, the peak storage volumes are lower at several locations, particularly Point of Interest 3. The lower storage volumes are a direct result of the cropland BMPs and storm sewer by‐pass. Also, Table 14 indicates that each peak storage volume is unchanged or decreased.
Table 15 – Peak Storage Volume Comparison (2015 vs. Alternative 1) Point of 2015 Storage Vol. (ac‐ft) Alt. 1 Storage Vol. (ac‐ft) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 3 Lake DeNeveu 49.7 93.1 186.8 45.1 79.6 158.3 5 Ledgetop‐D2b 2.1 4.7 6.4 1.8 4.5 6.3 6 Low Area 1.1 1.8 3.2 1.0 1.6 3.0 8 Low Area 1.0 1.4 2.0 1.0 1.3 1.9
B.
The proposed cropland management practices (mulch tillage and cover crops) are anticipated to reduce cropland phosphorus discharges by approximately 57%, as compared to conventional tillage. Conversion of cropland to grassland or woodland is estimated to reduce cropland phosphorus discharges by approximately 96%, as compared to conventional tillage. The opinion of probable cost for Alternative 1 is $1.4 million. If the WisDOT installs the storm sewer along USH 45 as part of the 2018 highway resurfacing project, the costs are anticipated to be less. This opinion of probable cost does not include the cropland BMPs since it is assumed that NRCS and/or DATCP will provide cost sharing for the cropland BMPs. Alternative 2 Alternative 2 is depicted in Figure 15. Alternative 2 consists of a ravine dam structure upslope of USH 45 and 3,000 feet of 24‐inch storm sewer or grass ditch along Reinhardt Road and CTH K. The 24‐inch storm sewer is a high flow by‐pass for the stream located at the northeast corner of Lake DeNeveu. At USH 45, high stream flows are diverted into the 24‐inch storm sewer and then discharged into the CTH K stream crossing, which Stormwater Management Study
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is located 500 feet south of Reinhardt Road. Low stream flows are to continue through the USH 45 culvert crossing, which is a navigable stream based on Exhibit 3. Maintaining low flows in the stream channel will likely be a DNR Chapter 30 Permit requirement. The 24‐inch storm sewer is proposed to be 1 foot higher than the stream bed elevation on the east side of the USH 45 culvert and then drop several feet into a storm manhole. Along Reinhardt Road, the 24‐inch storm sewer is anticipated to be about 5 feet below the ditch bottom. Alternative 2 also includes 1,700 linear feet of 24‐inch storm sewer along USH 45, between culvert CV‐D2a and culvert CV‐D3. The 24‐inch storm sewer is designed to convey stormwater runoff to the 24‐inch storm sewer along Reinhardt Road. Lastly, Alternative 2 assumes cropland located within the study area (168 acres) is converted from conventional tillage to mulch tillage with cover crops. Table 16 summarizes peak water surfaces elevations for Alternative 2.
Table 16 – Peak Water Surface Elevations (Alternative 2) Point of US Culvert Overland Peak Water Surface Elev. (ft) Interest Location Elev. (ft) Elev. (ft) 2‐Year 10‐Year 100‐Year 1 Reinhardt Rd. 815.7 827.0 820.6 821.8 822.7 2 CTH K 832.3 845.8 833.8 834.3 834.9 3 Lake DeNeveu ‐ ‐ 862.5 863.0 863.9 4 USH 45‐D2a 881.0 886.0 882.7 883.5 886.2 5 Ledgetop‐D2b ‐ 1021.2 1020.8 1021.7 1022.2 6 Low Area ‐ 1062.5 1063.0 1063.3 1063.7 7 Ledgetop‐D2d 1020.8 1034.0 1022.1 1023.7 1029.4 8 Low Area ‐ 1051.5 1051.7 1051.9 1052.2 9 USH 45‐D3 950.8 953.5 946.5 947.0 953.4 10 USH 45‐D4 961.0 963.0 962.0 962.5 963.8 11 USH 45‐D5 970.0 976.3 971.7 973.1 974.5 12 Devils Lake ‐ 850.0 845.9 847.5 849.9
Table 17 compares peak water surface elevations for Alternative 2 to the peak water surface elevations for the 2015 condition. As shown in Table 17, peak water elevations are lower at several locations, particularly Points of Interest 4 and 9. Point of Interest 12 is lower due to less overland flow from culvert CV‐D2a (Point of Interest 4). Also, Table 17 indicates that each 10‐year peak water surface elevation is decreased, except at CTH K, which is a concern.
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Table 17 – Peak Water Surface Elevation Comparison (2015 vs. Alternative 2) Point of US Culvert Overland 10‐Year Peak Water Elev. (ft) Interest Location Elev. (ft) Elev. (ft) 2015 Alt. 2 Change 1 Reinhardt Rd. 815.7 827.0 821.8 821.8 0.0 2 CTH K 832.3 845.8 834.0 834.3 +0.3 3 Lake DeNeveu ‐ ‐ 863.1 863.0 ‐0.1 4 USH 45‐D2a 881.0 886.0 886.6 883.5 ‐3.1 5 Ledgetop‐D2b ‐ 1021.2 1021.7 1021.7 0.0 6 Low Area ‐ 1062.5 1063.4 1063.3 ‐0.1 7 Ledgetop‐D2d 1020.8 1034.0 1024.2 1023.7 ‐0.5 8 Low Area ‐ 1051.5 1051.9 1051.9 0.0 9 USH 45‐D3 950.8 953.5 953.4 947.0 ‐6.4 10 USH 45‐D4 961.0 963.0 962.5 962.5 0.0 11 USH 45‐D5 970.0 976.3 973.1 973.1 0.0 12 Devils Lake ‐ 850.0 848.0 847.5 ‐0.5 Table 18 compares the Alternative 2 peak discharges to the 2015 peak discharges. As shown in Table 18, the peak discharges are lower at several locations, particularly Points of Interest 4 and 9. Also, Table 18 indicates that each peak discharge is decreased, except at CTH K, which is a concern.
Table 18 – Peak Discharge Comparison (2015 vs. Alternative 2) Point of 2015 Peak Discharge (cfs) Alt. 2 Peak Discharge (cfs) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 1 Reinhardt Rd. 282 559 1,255 282 558 1,252 2 CTH K 31 60 127 46 89 157 3 Lake DeNeveu 1 6 27 1 5 21 4 USH 45‐D2a 56 125 361 34 63 136 5 Ledgetop‐D2b 30 76 266 27 66 254 6 Low Area 17 41 96 14 36 91 7 Ledgetop‐D2d 21 63 97 19 62 96 8 Low Area 10 30 50 9 28 50 9 USH 45‐D3 14 35 88 0 0 41 10 USH 45‐D4 4 8 17 4 8 17 11 USH 45‐D5 12 26 59 12 26 59 12 Devils Lake 0 0 18 0 0 0 Table 19 compares the Alternative 2 flow velocities to the 2015 flow velocities. As shown in Table 19, the flow velocities are lower at Point of Interest 4. Also, Table 19 indicates that each peak flow velocity is decreased, except at CTH K, which is a concern. Higher stream velocities can result in future erosion.
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Table 19 – Peak Stream Velocity Comparison (2015 vs. Alternative 2) Point of 2015 Peak Velocity (fps) Alt. 2 Peak Velocity (fps) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 1 Reinhardt Rd. 1.6 2.1 3.1 1.6 2.1 3.1 2 CTH K 2.8 2.9 3.6 2.8 3.2 3.8 4 USH 45‐D2a 4.6 6.0 8.7 3.8 4.5 5.9 Table 20 compares the Alternative 2 peak storage volumes to the 2015 peak storage volumes. As shown in Table 20, the peak storage volumes are lower at several locations, particularly Point of Interest 3. The lower storage volumes are a direct result of the cropland BMPs and storm sewer by‐pass. Also, Table 20 indicates that each peak storage volume is decreased, except at Ravine Dam, which is not a concern since the storage area is proposed to be located within a permanent easement. The Ravine Dam is proposed to have a 30.6 acre‐foot storage volume and an 18.5 foot structural height.
Table 20 – Peak Storage Volume Comparison (2015 vs. Alternative 2) Point of 2015 Storage Vol. (ac‐ft) Alt. 2 Storage Vol. (ac‐ft) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 3 Lake DeNeveu 49.7 93.1 186.8 45.9 84.1 175.3 Ravine Dam ‐ ‐ ‐ 0.6 6.4 30.6 5 Ledgetop‐D2b 2.1 4.7 6.4 1.8 4.5 6.3 6 Low Area 1.1 1.8 3.2 1.0 1.6 3.0 8 Low Area 1.0 1.4 2.0 1.0 1.3 1.9
C.
The proposed cropland management practices (mulch tillage and cover crops) are anticipated to reduce cropland phosphorus discharges by approximately 57%, as compared to conventional tillage. Conversion of cropland to grassland or woodland is estimated to reduce cropland phosphorus discharges by approximately 96%, as compared to conventional tillage. The opinion of probable cost for Alternative 2 is $1.2 million with storm sewer along Reinhardt Road and CTH K and $1.0 million with a grass ditch along portions of Reinhardt Road and CTH K. The opinion of probable cost includes an allowance to acquire a permanent easement for the ravine dam and associated flood storage. If the WisDOT installs the storm sewer along USH 45 as part of the 2018 highway resurfacing project, the costs are anticipated to be less. This opinion of probable cost does not include the cropland BMPs since it is assumed that NRCS and/or DATCP will provide cost sharing for the cropland BMPs. Alternative 3 Alternative 3 is depicted in Figure 16. Alternative 3 consists of lowering the Quarry pond, converting the Quarry Pond to a Code 1001 Wet Detention Pond, and installing Stormwater Management Study
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500 feet of 30‐inch storm sewer at the northeast corner of Lake DeNeveu. The 30‐inch storm sewer is a high flow by‐pass for the stream located at the northeast corner of Lake DeNeveu. At USH 45, high stream flows are diverted into the 30‐inch storm sewer and then discharged directly into Lake DeNeveu. Low stream flows are to continue through the USH 45 culvert crossing, which is a navigable stream based on Exhibit 3. Maintaining low flows in the stream channel will likely be a DNR Chapter 30 Permit requirement. The 30‐inch storm sewer is proposed to be 1 foot higher than the stream bed elevation on the east side of the USH 45 culvert and then drop several feet into a storm manhole. The 30‐inch storm sewer is anticipated to be about 6 feet below the ground. Alternative 3 also includes 1,100 feet of 24‐inch storm sewer on private property, between culvert CV‐D3 and Lake DeNeveu. Table 21 summarizes peak water surfaces elevations for Alternative 3.
Table 21 – Peak Water Surface Elevations (Alternative 3) Point of US Culvert Overland Peak Water Surface Elev. (ft) Interest Location Elev. (ft) Elev. (ft) 2‐Year 10‐Year 100‐Year 1 Reinhardt Rd. 815.7 827.0 820.6 821.8 822.8 2 CTH K 832.3 845.8 833.6 834.0 834.6 3 Lake DeNeveu ‐ ‐ 862.6 863.1 864.2 4 USH 45‐D2a 881.0 886.0 882.6 883.6 886.7 5 Ledgetop‐D2b ‐ 1021.2 1017.1 1018.8 1022.0 6 Low Area ‐ 1062.5 1063.1 1063.4 1063.8 7 Ledgetop‐D2d 1020.8 1034.0 1022.2 1024.1 1029.6 8 Low Area ‐ 1051.5 1051.7 1051.9 1052.2 9 USH 45‐D3 950.8 953.5 945.6 946.1 953.3 10 USH 45‐D4 961.0 963.0 962.0 962.5 963.8 11 USH 45‐D5 970.0 976.3 971.7 973.1 974.5 12 Devils Lake ‐ 850.0 845.9 847.5 850.0
Table 22 compares peak water surface elevations for Alternative 3 to the peak water surface elevations for the 2015 condition. As shown in Table 22, peak water elevations are lower at several locations, particularly Points of Interest 4, 5 and 9. Point of Interest 12 is lower due to less overland flow from culvert CV‐D2a (Point of Interest 4). Also, Table 22 indicates that each 10‐year peak water surface elevation is unchanged or decreased.
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Table 22 – Peak Water Surface Elevation Comparison (2015 vs. Alternative 3) Point of US Culvert Overland 10‐Year Peak Water Elev. (ft) Interest Location Elev. (ft) Elev. (ft) 2015 Alt. 3 Change 1 Reinhardt Rd. 815.7 827.0 821.8 821.8 0.0 2 CTH K 832.3 845.8 834.0 834.0 0.0 3 Lake DeNeveu ‐ ‐ 863.1 863.1 0.0 4 USH 45‐D2a 881.0 886.0 886.6 883.6 ‐3.0 5 Ledgetop‐D2b ‐ 1021.2 1021.7 1018.8 ‐2.9 6 Low Area ‐ 1062.5 1063.4 1063.4 0.0 7 Ledgetop‐D2d 1020.8 1034.0 1024.2 1024.1 ‐0.1 8 Low Area ‐ 1051.5 1051.9 1051.9 0.0 9 USH 45‐D3 950.8 953.5 953.4 946.1 ‐7.3 10 USH 45‐D4 961.0 963.0 962.5 962.5 0.0 11 USH 45‐D5 970.0 976.3 973.1 973.1 0.0 12 Devils Lake ‐ 850.0 848.0 847.5 ‐0.5 Table 23 compares the Alternative 3 peak discharges to the 2015 peak discharges. As shown in Table 23, the peak discharges are lower at several locations, particularly Points of Interest 4, 5, and 9. Also, Table 23 indicates that each peak discharge is unchanged or decreased, except the 100‐year peak discharge at Reinhardt Road and the Lake DeNeveu outlet, which are a slight concern. These peak discharge increases can likely be mitigated with a larger Quarry Pond or some cropland BMPs.
Table 23 – Peak Discharge Comparison (2015 vs. Alternative 3) Point of 2015 Peak Discharge (cfs) Alt. 3 Peak Discharge (cfs) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 1 Reinhardt Rd. 282 559 1,255 282 559 1,260 2 CTH K 31 60 127 31 60 127 3 Lake DeNeveu 1 6 27 1 6 33 4 USH 45‐D2a 56 125 361 34 69 177 5 Ledgetop‐D2b 30 76 266 22 39 160 6 Low Area 17 41 96 17 41 96 7 Ledgetop‐D2d 21 63 97 21 64 97 8 Low Area 10 30 50 10 30 50 9 USH 45‐D3 14 35 88 0 0 26 10 USH 45‐D4 4 8 17 4 8 17 11 USH 45‐D5 12 26 59 12 26 59 12 Devils Lake 0 0 18 0 0 0 Table 24 compares the Alternative 3 flow velocities to the 2015 flow velocities. As shown in Table 24, the flow velocities are lower at Point of Interest 4. Also, Table 24 indicates that each peak flow velocity is unchanged or decreased.
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Table 24 – Peak Velocity Comparison (2015 vs. Alternative 3) Point of 2015 Peak Velocity (fps) Alt. 3 Peak Velocity (fps) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 1 Reinhardt Rd. 1.6 2.1 3.1 1.6 2.1 3.1 2 CTH K 2.8 2.9 3.6 2.8 2.9 3.6 4 USH 45‐D2a 4.6 6.0 8.7 3.8 4.7 6.4 Table 25 compares the Alternative 3 peak storage volumes to the 2015 peak storage volumes. As shown in Table 25, the peak storage volumes are higher within Lake DeNeveu (Point of Interest 3), which is a slight concern. The peak storage volume increases in Lake DeNeveu can likely be mitigated with a larger Quarry Pond or some cropland BMPs. The higher storage volumes in Quarry Pond (Point of Interest 5) are a direct result of lowering the pond’s normal water surface elevation about 5 feet and increasing the storage capacity, as compared to current conditions. The Quarry Pond is proposed to have a 17.2 acre‐foot storage volume.
Table 25 – Peak Storage Volume Comparison (2015 vs. Alternative 3) Point of 2015 Storage Vol. (ac‐ft) Alt. 3 Storage Vol. (ac‐ft) Interest Location 2‐Year 10‐Yr 100‐Yr 2‐Year 10‐Yr 100‐Yr 3 Lake DeNeveu 49.7 93.1 186.8 52.0 93.5 195.8 5 Ledgetop‐D2b 2.1 4.7 6.4 3.3 7.4 17.2 6 Low Area 1.1 1.8 3.2 1.1 1.8 3.2 8 Low Area 1.0 1.4 2.0 1.0 1.4 2.0 Conversion of the Quarry Pond to a Code 1001 Wet Detention Pond is anticipated to reduce cropland phosphorus discharges located upslope of the wet detention pond by approximately 60%, as compared to conventional tillage. The opinion of probable cost for Alternative 3 is $750,000. If the WisDOT installs the storm sewer along USH 45 as part of the 2018 highway resurfacing project, the costs are anticipated to be less. The opinion of probable cost assumes no additional easement or land acquisition is needed, since the Quarry Pond is assumed to already be located within a permanent easement.
VI.
SUMMARY For this study, the County requested that McMAHON’s scope be limited to flood and runoff mitigation at the north and east side of Lake DeNeveu. When evaluating strategies, the County requested that McMAHON consider the ability to permit and obtain approval for the alternatives. Current drainage system performance was a consideration when the alternatives were identified and evaluated. Changing a drainage system has the potential to create new problems Stormwater Management Study
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or merely push an existing problem to a new location. For example, if the stream at the northeast corner of Lake DeNeveu was rerouted away from Lake DeNeveu and into Devils Lake, McMAHON anticipates that runoff volumes and consequently, water levels within Devils Lake will increase, which may create problems for a new group of landowners. Bedrock was a consideration when the alternatives were identified and evaluated. For example, the USH 45 and CTH H triangle intersection appears to have a shallow depth to bedrock, which can significantly increase wet detention pond costs due to the required rock blasting. Groundwater protection was a consideration when the alternatives were identified and evaluated. The USH 45 corridor appears to contain shallow bedrock and groundwater. Stormwater treatment systems located within bedrock or groundwater have the potential to contaminate groundwater, unless liners are used to protect groundwater. Bioretention and other structural treatment systems that rely on infiltration are not effective at phosphorus removal if a clay or synthetic liner is needed to protect groundwater. Failing septic systems can be source of phosphorus. Exhibit 14 identifies residential properties served by public sanitary sewers owned by the Empire Sanitary District #1. Residential properties located east of USH 45 appear to be served by private septic systems. Private septic systems in close proximity to bedrock or groundwater have the potential to contribute phosphorus to Lake DeNeveu, particularly if the septic system is leaking or failing. For this study, three (3) alternatives were evaluated. Costs ranged from $750,000 to $1.4 million. Below are various recommendations for the County to consider when selecting an alternative. A. Implementation It is recommended that the County select one (1) alternative for implementation. The County can select one (1) of the study alternatives or assemble a new alternative. Each alternative has pros and cons. Also, each stakeholder may prefer a different alternative. As such, public education and involvement are recommended when selecting an alternative for implementation. Although this stormwater study provides opinions of probable cost and performance summaries, the study does not take into consideration intangibles such as public sentiment, public opinion, land availability, etc. McMAHON can facilitate a discussion during the presentation and provide expertise to assist with selecting an alternative. B. Inter‐Governmental Agreements It is recommended that the County consider inter‐governmental agreements when implementing the selected alternative. For example, it may be more cost effective to work with the WisDOT to implement specific components as part of the USH 45 resurfacing project. Stormwater Management Study Lake DeNeveu FOND DU LAC COUNTY | Fond du Lac County, Wisconsin
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C.
Water Quality Trading It is recommended that the County evaluate water quality trading opportunities before implementing cropland practices. The costs for achieving compliance with state‐wide phosphorus criteria are not uniform among dischargers. For example, a wastewater treatment plant discharger may find compliance with phosphorus criteria more cost‐ effectively achieved by trading with cropland landowners. Water quality trading is allowed between wastewater treatment facilities, agricultural landowners, and urban dischargers. Water quality trading may provide a funding source to assist with implementation of cropland practices.
D.
Funding Sources Below is a discussion of various funding sources which may be available to the County. Depending on the project, funding options may be used individually or in combination.
Debt / Bonds: General obligation and revenue bonds may be used to secure funding for stormwater projects. Property taxes and revenue fees are used for debt payments.
Special Assessments: Special assessments may be used to generate funds for a specific project. Property owners that benefit from the project pay the assessment fee. Typically, other funding sources are needed until property owners pay the assessment.
Impact Fees: Impact fees may be charged to developers for stormwater projects that benefit the development. Impact fees are usually paid during initial stages of development. Typically, projects include regional stormwater facilities or improvements to deficient downstream infrastructure. Often, other funding sources are needed to pay for project costs until developers and property owners are required to pay the impact fee. Impact fees are recommended as needed to fund the municipal stormwater program.
Stormwater Utility / Lake District: Stormwater utilities generate revenue for stormwater related projects by charging property owners an annual service fee. Annual fees are based upon the amount of runoff generated by a property. Properties with more impervious area (i.e. roofs, driveways, etc.) are charged a higher fee as compared to properties with less impervious area. All properties, including tax exempt properties, pay the service fee.
Grants / Loans: State and federal grant / loans are available for certain stormwater projects. Typically, only a certain percent of the total project cost is eligible for grant / loan money with remaining revenues to be generated by the applicant. Stormwater Management Study
Lake DeNeveu FOND DU LAC COUNTY | Fond du Lac County, Wisconsin
Page 34
Below are a few grant / loan programs which the Town may or may not be familiar with. Grant applications are recommended. Urban Non‐Point Source and Stormwater Construction Grant Targeted Runoff Management Construction Grant Community Development Block Grant Clean Water Fund
Stormwater Management Study Lake DeNeveu FOND DU LAC COUNTY | Fond du Lac County, Wisconsin
Page 35
DR
ING
SHEILA ST
WENDY LA
DONDOR DR
LA
DE NE VE U
Mapped Features St ud y AreaBound ary Munic ipalBound ary Parc elLine
VUE DR
EMERY LA
V UE CT
LEDGETOP DR
GLEN ECHO RD
L AC
KAREN CT
AND TR RL E OV
RE DW
GLACI ER CT
RADE
REINHARDT RD
R TI M B E R D RI DG E
ANN DR M
W INNVUE CT
W
DR
P CT ETO DG LE
BOYK E
De N Cr eve ee u k
HITETAIL CT
Devils Lake
St ream ( DNR)
SEE
K
MEI
" ) Lake De Neveu OAK
Surfac eWat er
H
" )
SUMMIT DR
Sourc e:Fond d uLac Count y,201516;WDNR,2013.
GRANDVIEW RD
SUM
T CT MI
DR
HILL RD
Augus t1 1,2017 kpk
" )
Town of Empire
H
HN EJO KL
VALLEY DR
£ ¤ L MIL
V
" )
Town of Byron
Town of Eden
Dis c laim er:Thepropert y lines ,right ofway lines ,and ot her propert y inform at ion on t his d rawing wered eveloped or ob t ained as partoft he Count y Geographic I nform at ion Sys t em or t hrough t heCount y propert yt axm apping func t ion.Mc MAHO NASSO CI ATES,I NC.d oes not guarant eet his inform at ion t o b ec orrec t ,c urrent ,or c om plet e. Thepropert y and right ofway inform at ion areonly int end ed for us eas a generalreferenc eand arenotint end ed or s uit ab lefor s it es pec ific us es . Any us et ot hec ont rary oft heab ov es t at ed us es is t heres pons ib ilit y oft heus er and s uc h us eis att heus er’s own ris k .
0
45
RD
BAUDRY LA
w: \PRO J ECTS\F0983\91700160\CADD\GI S\LakeDeNeveu\SWMP_Maps \Figure1_B. mx d
CLUB DENEVEU DR
Town of Fond du Lac
BIRCH RD
I 1, 000
2, 000
Feet
FI GURE1 STUDY AREA LAKEDENEVEU STO RMWATERMANAGEMENTPLAN TO WNO FEMPI RE FO NDDULACCO UNTY ,WI SCO NSI N
R ED
AND TR ERL OV
REINHARDT RD
Low Area
£ ¤ 45
NO
S
H
K " )
OR
L AC
GRANDVIEW RD
WINNVUE CT
GLAC IER CT
I DG
ETOP CT DG LE
TIMBE R R
BOYKE DR
V UE C T
Stud yAre a Bound ary
RTH
EL
A
Are aof I nte re s t
Gravel Pit 1960's-1980's
Cul ve rt
EU
LA
Munic ipal Bound ary
P arc e lLine Stre am ( DNR)
Augus t 1 1,2017 kpk
DE
LEDGETOP DR
NE V
Low Area
Surf ac e Wate r
£ ¤ 45
Sourc e :Fond d uLac County ,201016;WDNR,2013.
K " )
Lake De Neveu
H " )
Town of Empire
SUMMIT CT
CLUB DENEVEU DR
H " )
Dis c l aime r:The prope rtyl ine s ,rightof wayl ine s ,and othe r prope rty inf ormation on this d rawing we re d e ve l ope d or obtaine d as part ofthe CountyGe ographic I nf ormation Sy s te m or through the County prope rtytaxmapping f unc tion.Mc MAHONASSOCI ATES,I NC.d oe s not guarante e this inf ormation to be c orre c t,c urre nt,or c ompl e te . The prope rtyand rightof wayinf ormation are onl yinte nd e d f or us e as a ge ne ral re f e re nc e and are not inte nd e d or s uitabl e f or s ite s pe c if ic us e s . Anyus e to the c ontraryofthe abov e s tate d us e s is the re s pons ibil ity ofthe us e r and s uc h us e is at the us e r’s own ris k.
0
I 600
1, 200
Fe e t
ME IKL EJO HN
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Mapped Features
DR
£ ¤
SUMMIT DR
45
O AK
H ILL
RD
FI GURE2 HISTORIC PHOTO (2010) LAKEDENEVEU STORMWATERMANAGEMENTP LAN TOWNOFEMP I RE FONDDULACCOUNTY,WI SCONSI N
TO P
DR
R ED
AND TR ERL OV
LED GE
REINHARDT RD
£ ¤ 45
NO
S
H
K " )
OR
LA C
Low Area
GRANDVIEW RD
WINNVUE CT
GLAC IER CT
I DG
ETOP CT DG LE
TIMBE R R
BOYKE DR
RTH
EL
A
Are aof I nte re s t
Gravel Pit 1960's-1980's
Cul ve rt
EU
LA
Munic ipal Bound ary
Low Area
P arc e lLine Stre am ( DNR)
DE
NE V
Mapped Features
Stud yAre a Bound ary
V UE CT
£ ¤ 45
Sourc e :Fond d uLac County ,200016;WDNR,2013. .
K " )
Lake De Neveu
H " )
Town of Empire
SUMMIT CT
CLUB DENEVEU DR
H " )
Dis c l aime r:The prope rtyl ine s ,rightof wayl ine s ,and othe r prope rty inf ormation on this d rawing we re d e ve l ope d or obtaine d as part ofthe CountyGe ographic I nf ormation Sy s te m or through the County prope rtytaxmapping f unc tion.Mc MAHONASSOCI ATES,I NC.d oe s not guarante e this inf ormation to be c orre c t,c urre nt,or c ompl e te . The prope rtyand rightof wayinf ormation are onl yinte nd e d f or us e as a ge ne ral re f e re nc e and are not inte nd e d or s uitabl e f or s ite s pe c if ic us e s . Anyus e to the c ontraryofthe abov e s tate d us e s is the re s pons ibil ity ofthe us e r and s uc h us e is at the us e r’s own ris k.
0
I 600
1, 200
Fe e t
ME IKL EJO HN
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Augus t 1 1,2017 kpk
Surf ac e Wate r
DR
£ ¤
SUMMIT DR
45
O AK
H ILL
RD
FI GURE3 HISTORIC PHOTO (2000) LAKEDENEVEU STORMWATERMANAGEMENTP LAN TOWNOFEMP I RE FONDDULACCOUNTY,WI SCONSI N
LED GE
REINHARDT RD
£ ¤ 45
NO
S
H
K " )
OR E
Low Area LA C
VUE C
GRANDVIEW RD
WINNVUE CT
TO P
R ED
AND TR ERL OV
DR
GLAC IER CT
I DG
TOP CT DGE LE
TIMBE R R
BOYKE DR
RT H
LA
Areaof I nt eres t
Gravel Pit 1960's-1980's
Cul vert
EU
LA
Munic ipal Bound ary
Parc elLine St ream ( DNR)
DE
NE V
Low Area
EMERY
Surfac eWat er
LA
Augus t1 1,2017 kpk
£ ¤ 45
Sourc e:Fond d uLac Count y,19902016;WDNR,2013.
K " )
Lake De Neveu
H " )
Town of Empire
SUMMIT CT
CLUB DENEVEU DR
H " )
Dis c l aim er:Thepropert yl ines ,right ofway l ines ,and ot her propert y inform at ion on t his d rawing wered evel oped or ob t ained as partoft he Count y Geographic I nform at ion Sys t em or t hrough t heCount y propert yt axm apping func t ion.Mc MAHO NASSO CI ATES,I NC.d oes not guarant eet his inform at ion t o b ec orrec t ,c urrent ,or c om pl et e. Thepropert y and right ofway inform at ion areonl y int end ed for us eas a general referenc eand arenotint end ed or s uit ab l efor s it es pec ific us es . Any us et ot hec ont rary oft heab ov es t at ed us es is t heres pons ib il it y oft heus er and s uc h us eis att heus er’s own ris k.
0
I 600
1, 200
Feet
ME IKL EJO HN
w: \PRO JECTS\F0983\91700160\CADD\GI S\LakeDeNeveu\SWMP_Maps \Figure4_B. mx d
Mapped Features
St ud y Area Bound ary
T
DR
£ ¤
SUMMIT DR
45
O AK
HILL
RD
FI GURE4 HISTORIC PHOTO (1990) LAKEDENEVEU STO RMWATERMANAGEMENTPLAN TO WNO FEMPI RE FO NDDULACCO UNTY ,WI SCO NSI N
T
Driveway 1930's-1980's
AND TR ERL OV
CT
GLAC IER CT
Farmstead Building 1930's-1980's
WI NNVUE C
BOYKE DR
TOP DGE LE
Farmstead Building 1930's-1980's
REINHARDT RD
Low Area L AC
K " )
RE
TH
LA
£ ¤ 45
GRANDVIEW RD
NO R SH O
Mapped Features
V UE C T
EU
LA
Gravel Pit 1960's-1980's
Culvert
Munic ipal Bound ary
Parc elLine St ream ( DNR)
Sourc e:Fond d uLac Count y,19722016;WDNR,2013.
K " )
Lake De Neveu
SUMMIT CT
CLUB DENEVEU DR
H " )
ME
H " )
Dis c laim er:Thepropert y lines ,right ofway lines ,and ot her propert y inform at ion on t his d rawing wered eveloped or ob t ained as partoft he Count y Geographic I nform at ion Sys t em or t hrough t heCount y propert yt axm apping func t ion.Mc MAHO NASSO CI ATES,I NC.d oes not guarant eet his inform at ion t o b ec orrec t ,c urrent ,or c om plet e. Thepropert y and right ofway inform at ion areonly int end ed for us eas a generalreferenc eand arenotint end ed or s uit ab lefor s it es pec ific us es . Any us et ot hec ont rary oft heab ov es t at ed us es is t heres pons ib ilit y oft heus er and s uc h us eis att heus er’s own ris k .
0
I 600
1, 200
Feet
£ ¤ 45
IKL EJO HN
w: \PRO JECTS\F0983\91700160\CADD\GI S\LakeDeNeveu\SWMP_Maps \Figure5_B. mx d
Areaof I nt eres t
Surfac eWat er
Augus t1 1,2017 k pk
DE
Town of Empire
LEDGETOP DR
NE V
Low Area
St ud y Area Bound ary
SUMMIT DR
DR
O AK
H ILL
RD
FI GURE5 HISTORIC PHOTO (1972) LAKEDENEVEU STO RMWATERMANAGEMENTPLAN TO WNO FEMPI RE FO NDDULACCO UNTY ,WI SCO NSI N
GLACIER CT
T
AND TR ERL V O
CT
Driveway 1930's-1980's
Farmstead Building 1930's-1980's
WI NNVUE C
BOYKE DR
TOP DGE LE
Farmstead Building 1930's-1980's
REINHARDT RD
Low Area
Mapped Features
UE CT
GRANDVIEW RD
LA C V
VE
U
LA
Gravel Pit 1960's-1980's
£ ¤
" )
Culvert
Munic ipal Bound ary
Surfac eWat er
Sourc e:Fond d uLac Count y,201516;WDNR,2013;USDA,1937
" ) H
" ) H
Lake De Neveu
Dis c laim er:Thepropert y lines ,right ofway lines ,and ot her propert y inform at ion on t his d rawing wered eveloped or ob t ained as partoft he Count y Geographic I nform at ion Sys t em or t hrough t heCount y propert yt axm apping func t ion.Mc MAHO NASSO CI ATES,I NC.d oes not guarant eet his inform at ion t o b ec orrec t ,c urrent ,or c om plet e. Thepropert y and right ofway inform at ion areonly int end ed for us eas a generalreferenc eand arenotint end ed or s uit ab lefor s it es pec ific us es . Any us et ot hec ont rary oft heab ov es t at ed us es is t heres pons ib ilit y oft heus er and s uc h us eis att heus er’s own ris k .
0
SUMMIT CT
CLUB DENEVEU DR
Augus t1 1,2017 k pk
K
I 600
1, 200
Feet
OAK
IKL EJO HN
DR
L RD H IL
ME
w: \PRO JECTS\F0983\91700160\CADD\GI S\LakeDeNeveu\SWMP_Maps \Figure6_B. mx d
Town of Empire
45
Areaof I nt eres t
Parc elLine St ream ( DNR)
LEDGETOP DR
DE
NE
Low Area
St ud y Area Bound ary
SUMMIT DR
FI GURE6 HISTORIC PHOTO (1937) LAKEDENEVEU STO RMWATERMANAGEMENTPLAN TO WNO FEMPI RE FO NDDULACCO UNTY ,WI SCO NSI N
LA
CV-D5
45
H
" ) D5
DR
ING
KAREN CT
" )
St ream ( DNR) Surfac eWat er
SUMMIT DR
Sourc e:Fond d uLac Count y,201516;WDNR,2013.
N1
VALLEY DR
Dis c laim er:Thepropert y lines ,right ofway lines ,and ot her propert y inform at ion on t his d rawing wered eveloped or ob t ained as partoft he Count y Geographic I nform at ion Sys t em or t hrough t heCount y propert yt axm apping func t ion.Mc MAHO NASSO CI ATES,I NC.d oes not guarant eet his inform at ion t o b ec orrec t ,c urrent ,or c om plet e. Thepropert y and right ofway inform at ion areonly int end ed for us eas a generalreferenc eand arenotint end ed or s uit ab lefor s it es pec ific us es . Any us et ot hec ont rary oft heab ov es t at ed us es is t heres pons ib ilit y oft heus er and s uc h us eis att heus er’s own ris k .
0
V
" )
Town of Byron
Town of Eden
RD
BAUDRY LA
L MIL
Culv ertand I D Parc elLine
H
Town of Empire
DrainageAreaand I D
Munic ipalBound ary
SEE
SUM
T CT MI
DR
CV-D3
D2e
D3
HILL RD
£ ¤
D1
D1
St ud y AreaBound ary
GRANDVIEW RD
Lake De Neveu
Mapped Features
VUE DR
DE NE VE U MEI
D4
D2d
OAK
Augus t1 1,2017 kpk
" )
D2c
D2b
CV-D3
HN EJO KL
w: \PRO J ECTS\F0983\91700160\CADD\GI S\LakeDeNeveu\SWMP_Maps \Figure7_B. mx d
CLUB DENEVEU DR
K
WENDY LA
CV-D2d
CV-D4
Town of Fond du Lac
V UE CT
SHEILA ST
D2a
TR
RE DW
GLACI ER CT
L AC
CV-D2a
N2
EMERY LA
OVERLAN D
DONDOR DR
GLEN ECHO RD
REINHARDT RD
HITETAIL CT
WI NNV UECT
De N Cr eve ee u k RADE
BOYKE DR
R TI M B E R D RI DG E
ANN DR M
V1b
P CT ETO DG LE
Filled Driveway Culvert
Devils Lake
W
V1a
BIRCH RD
I
1, 000
2, 000
Feet
FI GURE7 1972 DRAINAGE AREAS LAKEDENEVEU STO RMWATERMANAGEMENTPLAN TO WNO FEMPI RE FO NDDULACCO UNTY ,WI SCO NSI N
CVD2a
V UE CT
DR
ING
WENDY LA
D2b
N2
CV-D2b
LA
D2a
DE NE VE U
CV-D2d LEDGETOP DR
CVD3
CV-D3
D3
D2d
" )
Town of Empire
St rea m ( DN R) Surfa c e W a t er
CV-D5
Sourc e:FondduLa c Count y,201516;W DN R,2013.
N1
SUM
T CT MI
HILL RD
SUMMIT DR
VALLEY DR
£ ¤
Town of Byron
Town of Eden
RD
BAUDRY LA
V
" )
Discla im er:The p rop ert y lines,right ofwa y lines ,a ndot her p rop ert y inform a t ion on t hisdra wing were develop edor ob t a ineda sp a rtoft he Count y Geogra p hic I nform a t ion Syst em or t hrough t he Count y p rop ert yt a x m a p p ing func t ion.Mc MAHON ASSOCI ATES,I N C.doesnot gua ra nt ee t hisinform a t ion t o b e c orrec t ,c urrent ,or c om p let e. The p rop ert y a ndright ofwa y inform a t ion a re only int endedfor use a sa genera lreferenc e a nda re notint endedor s uit a b le for s it es p ec ific us es. Any use t ot he c ont ra ry oft he a b ov e st at edus esist he resp onsib ilit y oft he us er a nds uc h use isa tt he us er’ sown risk.
0
45
L MIL
Culv erta ndI D Pa rc elLine
CVD5
D1
DR
D5
OAK
MEI
H
" )
Dra ina ge Area a ndI D
Munic ip a lBounda ry
H
GRANDVIEW RD
CLUB DENEVEU DR
" )
Lake De Neveu
HN EJO KL
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K
CV-D3
SEE
CV-D4
Town of Fond du Lac
D1
St udy Area Bounda ry
D2e
CVD4
D4
Mapped Features
VUE DR
EMERY LA
CVD2d
D2c
DONDOR DR
CVD2b
KAREN CT
L AC
CV-D2a
RE DW
GLACI ER CT
AND TR RL E OV
SHEILA ST
GLEN ECHO RD
REINHARDT RD
W INNVUE CT
De N Cr eve ee u k RADE
BOYKE DR
R TI M B E R D RI DG E
ANN DR M
HITETAIL CT
P CT ETO DG LE
Filled Driveway Culvert
V1b
Devils Lake
W
V1a
BIRCH RD
I 1, 000
2, 000
Feet
FI GURE8 2015 DRAINAGE AREAS LAKEDEN EVEU STORMW ATERMAN AGEMEN TPLAN TOW N OFEMPI RE FON DDULACCOUN TY ,W I SCON SI N
DR
ING
Hydrologic Soil Group (HSG) HSGA( NA)
KAREN CT
WENDY LA
DONDOR DR
LA
DE NE VE U
HSG B HSG C HSG D
VUE DR
EMERY LA
V UE CT
LEDGETOP DR
GLEN ECHO RD
L AC
SHEILA ST
REINHARDT RD
AND TR RL E OV
RE DW
RADE
ANN DR M
R TI M B E R D RI DG E
GLACI ER CT
DR
W INNVUE CT
De N Cr eve ee u k
W
HITETAIL CT
P CT ETO DG LE
BOYK E
Devils Lake
Other Mapped Features
St ud y AreaBound ary
SEE
K
MEI
Lake De Neveu OAK
Parc elLine
St ream ( DNR)
SUMMIT DR
Sourc e:Fond d uLac Count y,201516;WDNR,2013;USDA,2015.
GRANDVIEW RD
SUM
T CT MI
DR
VALLEY DR
£ ¤
Town of Byron
Town of Eden
RD
BAUDRY LA
V
" )
Dis c laim er:Thepropert y lines ,right ofway lines ,and ot her propert y inform at ion on t his d rawing wered eveloped or ob t ained as partoft he Count y Geographic I nform at ion Sys t em or t hrough t heCount y propert yt axm apping func t ion.Mc MAHO NASSO CI ATES,I NC.d oes not guarant eet his inform at ion t o b ec orrec t ,c urrent ,or c om plet e. Thepropert y and right ofway inform at ion areonly int end ed for us eas a generalreferenc eand arenotint end ed or s uit ab lefor s it es pec ific us es . Any us et ot hec ont rary oft heab ov es t at ed us es is t heres pons ib ilit y oft heus er and s uc h us eis att heus er’s own ris k .
0
45
L MIL
Munic ipalBound ary
H
" )
Surfac eWat er HILL RD
Augus t1 1,2017 kpk
" )
Town of Empire
H
" )
HN EJO KL
w: \PRO J ECTS\F0983\91700160\CADD\GI S\LakeDeNeveu\SWMP_Maps \Figure9_B. mx d
CLUB DENEVEU DR
Town of Fond du Lac
BIRCH RD
I
1, 000
2, 000
Feet
FI GURE9 SOILS LAKEDENEVEU STO RMWATERMANAGEMENTPLAN TO WNO FEMPI RE FO NDDULACCO UNTY ,WI SCO NSI N
TH EL A
DR
ING
LDR -Low Dens i t y Si ngle Fa m i ly Resi dent i a l( 0. 5a c re t o 1. 5a c re lot s )
WENDY LA
DONDOR DR
LA
DE NE VE U
EMERY LA
V UE CT
LEDGETOP DR
R
Residential
MFR -Mult i Fa m i ly Resi dent i a l( 3or m ore fa m i li es,13st ory hei ght )
KAREN CT
GLEN ECHO RD
R NO O SH
L AC
SLAMM Standard Land Uses
SHEILA ST
REINHARDT RD
AND TR ERL V O
RE DW
RADE
ANN DR M
R TI M B E R D RI DG E
GLACI ER CT
DR
WI NNV UECT
De N Cr eve ee u k
W
HITETAIL CT
P CT ETO DG LE
BOYK E
Devils Lake
Institutional
SCHO O L-Pub li c or Pri va t e Sc hool UNI V-Uni vers i t y,College,Tec hni c a lSc hool,et c. MI SC -Mi sc ella neousFa c i li t i es( Churc hes,I nst i t ut i ona lProp ert y)
Commercial
CSTRI P-St ri p Com m erc i a lArea s( Court houses,Poli c e St at i ons,et c. )
Industrial
LI GHTI-Li ghtI ndust ri a lArea s( st ora ge a nd di st ri b ut i on ofgoodsfor ret ai lor s a le)
VUE DR
QUARRY -Aggrega t e Ext ra c t i on a ndExc a va t i on ( Exc ludesroa dRO W )
SEE
CLUB DENEVEU DR
K
" )
" ) Lake De Neveu
CEM -Cem et eri es,i nc ludi ng grounds ,roa ds,a ndb ui ldi ngs)
PARK-O ut door Rec rea t i ona lArea s( golfc ourse,a rb oret um s, b ot a ni c a lga rdens,m uni ci p a lp la ygrounds,a ndna t ura la rea s) RAI L-Ra i lroa dRO W ( Exc ludesroa dRO W ,st ora ge ya rds )
H
" )
FRMSTD-Fa rm st ea ds,i nc ludi ng li mi t edhouses, b ui ldi ngs,dri vewa ysa ndp a rki ng a rea s AGRI C -Agri c ult ure fi elds GRASS-Undevelop edla ndt ha ti sveget at ed( Exc ludesroa dRO W ) W O O DS-Fores t edor W oodedArea swi t h Lea f Li t t er W ETLND -DNR W et la ndI nvent ory Ma p W ATER-W a t ersoft he St at e a ndO t her O p en W a t ers
45
W ATER_SW PO ND -O p en wa t er a ssoc i at edwi t h st orm wa t er p ond
Transportation
HW Y -St at e or Count y Hi ghwa y
SUMMIT DR
Other Mapped Features
St udy Area Bounda ry Muni ci p a lBounda ry Pa rc elLi ne
GRANDVIEW RD
SUM
T CT MI
DR
HILL RD
£ ¤
OAK
MEI
Town of Empire
H
HN EJO KL
VALLEY DR
St rea m ( DNR) Surfa c e W a t er
0
L MIL
V
" )
Town of Byron
Town of Eden
RD
Sourc e:FondduLa c Count y,197216;W DNR,2013.
BAUDRY LA
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Town of Fond du Lac
Open Space
Di scla i m er:The p rop ert y li nes,ri ght ofwa y li nes ,a ndot her p rop ert y i nform a t i on on t hi sdra wi ng were develop edor ob t ai neda sp a rtoft he Count y Geogra p hi c I nform a t i on Syst em or t hrough t he Count y p rop ert yt a xm a p p i ng func t i on.Mc MAHO NASSO CI ATES,I NC.doesnot BIRCH RD gua ra nt ee t hi si nform a t i on t o b e c orrec t ,c urrent ,or c om p let e. The p rop ert y a ndri ght ofwa y i nform a t i on a re only i nt endedfor use a sa genera lreferenc e a nda re noti nt endedor s ui t a b le for s i t es p ec i fi c us es. Any use t ot he c ont ra ry oft he a b ov e st at edus esi st he resp onsi bi li t y oft he us er a nds uc h use i sa tt he us er’ sown ri sk.
I 1, 000
2, 000
Feet
FI GURE10 1972 LAND USE LAKEDENEVEU STO RMW ATERMANAGEMENTPLAN TO W NO FEMPI RE FO NDDULACCO UNTY ,W I SCO NSI N
AND TR RL E OV
DR
ING
Residential
V UE CT
MFR -Mult i Fa m i ly Resi dent i a l( 3or m ore fa m i li es,13st ory hei ght ) MO BR-Mob i le hom e or t ra i ler p a rk resi dent i al
KAREN CT
SHEILA ST
WENDY LA
DONDOR DR
LA
DE NE VE U
CLUB DENEVEU DR
MEI
H
" )
Town of Empire
Lake De Neveu
CSTRI P-St ri p Com m erc i a lArea s( Court houses,Poli c e St at i ons,et c. )
Industrial
CEM -Cem et eri es,i nc ludi ng grounds ,roa ds,a ndb ui ldi ngs)
PARK-O ut door Rec rea t i ona lArea s( golfc ourse,a rb oret um s, b ot a ni c a lga rdens,m uni ci p a lp la ygrounds,a ndna t ura la rea s) RAI L-Ra i lroa dRO W ( Exc ludesroa dRO W ,st ora ge ya rds )
H
" )
FRMSTD-Fa rm st ea ds,i nc ludi ng li mi t edhouses, b ui ldi ngs,dri vewa ysa ndp a rki ng a rea s AGRI C -Agri c ult ure fi elds
GRASS-Undevelop edla ndt ha ti sveget at ed( Exc ludesroa dRO W ) W ETLND -DNR W et la ndI nvent ory Ma p
OAK
HILL RD
SUMMIT DR
HW Y -St at e or Count y Hi ghwa y
Other Mapped Features
St udy Area Bounda ry Muni ci p a lBounda ry Pa rc elLi ne
GRANDVIEW RD
SUM
T CT MI
W ATER_SW PO ND -O p en wa t er a ssoc i at edwi t h st orm wa t er p ond
Transportation
£ ¤
Town of Eden
RD
Sourc e:FondduLa c Count y,201516;W DNR,2013.
BAUDRY LA
L MIL
St rea m ( DNR) Surfa c e W a t er
0
45
Town of Byron
QUARRY -Aggrega t e Ext ra c t i on a ndExc a va t i on ( Exc ludesroa dRO W )
Open Space
W O O DS-Fores t edor W oodedArea swi t h Lea f Li t t er
VALLEY DR
V
HO SP-Medi c a lfa c i li t i es,i nc ludi ng nurs i ng hom es,hosp i t a ls,et c.
W ATER-W a t ersoft he St at e a ndO t her O p en W a t ers
DR
" )
UNI V-Uni vers i t y,College,Tec hni c a lSc hool,et c.
LI GHTI-Li ghtI ndust ri a lArea s( st ora ge a nd di st ri b ut i on ofgoodsfor ret ai lor s a le)
HN EJO KL
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K
" )
SCHO O L-Pub li c or Pri va t e Sc hool
MI SC -Mi sc ella neousFa c i li t i es( Churc hes,I nst i t ut i ona lProp ert y)
SEE
Town of Fond du Lac
Institutional
Commercial
VUE DR
EMERY LA
SLAMM Standard Land Uses LDR -Low Dens i t y Si ngle Fa m i ly Resi dent i a l( 0. 5a c re t o 1. 5a c re lot s )
LEDGETOP DR
GLEN ECHO RD
L AC
RE DW
GLACI ER CT
RADE
REINHARDT RD
R TI M B E R D RI DG E
ANN DR M
P CT ETO DG LE
DR
W INNVUE CT
De N Cr eve ee u k
HITETAIL CT
W
BOYK E
Devils Lake
Di scla i m er:The p rop ert y li nes,ri ght ofwa y li nes ,a ndot her p rop ert y i nform a t i on on t hi sdra wi ng were develop edor ob t ai neda sp a rtoft he Count y Geogra p hi c I nform a t i on Syst em or t hrough t he Count y p rop ert yt a xm a p p i ng func t i on.Mc MAHO NASSO CI ATES,I NC.doesnot BIRCH RD gua ra nt ee t hi si nform a t i on t o b e c orrec t ,c urrent ,or c om p let e. The p rop ert y a ndri ght ofwa y i nform a t i on a re only i nt endedfor use a sa genera lreferenc e a nda re noti nt endedor s ui t a b le for s i t es p ec i fi c us es. Any use t ot he c ont ra ry oft he a b ov e st at edus esi st he resp onsi bi li t y oft he us er a nds uc h use i sa tt he us er’ sown ri sk.
I 1, 000
2, 000
Feet
FI GURE1 1 2015 LAND USE LAKEDENEVEU STO RMW ATERMANAGEMENTPLAN TO W NO FEMPI RE FO NDDULACCO UNTY ,W I SCO NSI N
ALL A
NC
13
_ ^
T
151 ¬ « K
M ANSKE DR
" )
GLACIER CT
_ ^
VUE CT
6
5
D2a
DE NE VE U
LA
Town of Empire
3
9
_ ^
_ ^
_ ^
_ ^
D2c
D2b 8
^7 _
_ ^ D2d
D2e
D3
10
P arc e l Line
DONDORD
Stre am ( DNR) Surf ac e Wate r Sourc e :Fond d uLac County ,19722016;WDNR,2013. Dis c l aime r:The prope rtyl ine s ,rightof wayl ine s ,and othe r prope rty inf ormation on this d rawing we re d e ve l ope d or obtaine d as part ofthe CountyGe ographic I nf ormation Sy s te m or through the County prope rtytaxmapping f unc tion.Mc MAHONASSOCI ATES,I NC.d oe s not guarante e this inf ormation to be c orre c t,c urre nt,or c ompl e te . The prope rtyand rightof wayinf ormation are onl yinte nd e d f or us e as a ge ne ralre f e re nc e and are not inte nd e d or s uitabl e f or s ite s pe c if ic us e s . Anyus e to the c ontraryofthe abov e s tate d us e s is the re s pons ibil ity ofthe us e r and s uc h us e is at the us e r’s own ris k.
Lake De Neveu
11
" )
0
D5
I 800
1, 600
Fe e t
_ ^
SUMMIT CT
L EI K M HN EJO
DR
D1
H
" )
H
OAK HILL RD
CLUB DENEVEU DR
_ ^
D4
Drainage Are aand I D Munic ipal Bound ary
GRANDVIEW RD
De N ev Cree eu k
EE
RAD EM
D2e
R
_ ^
LAC
4
P oint ofI nte re s t Stud yAre aBound ary
RU N
CT
DR
2
K
OVERLA ND TR
_ ^
45
£ ¤ N S ORTH HO RE LA
" )
PHEASA NT
W INNVUE
GE
EMERY LA
ETOP CT DG LE
D BER RI
Augus t 1 1,2017 kpk
1
REINHARDT RD
_ ^
Other Mapped Features
WHITETAIL CT
T IM
1
w: \P ROJ ECTS\F0983\91700160\CADD\GI S\Lake De Ne ve u\SWMP _ Maps \Figure 12_ B. mxd
Devils Lake
N DR AN
Town of Fond du Lac
100Ye ar Fl ood ing Limits
_ ^
K
" ) BOYKE DR
CR VALLEY
10Ye ar Fl ood ing Limits
12
LEDGETOP DR
KR D
VA LLE CT Y
SUMMIT DR
FI GURE12 1972 FLOODING LIMITS LAKEDENEVEU STORMWATERMANAGEMENTP LAN TOWNOFEMP I RE FONDDULACCOUNTY,WI SCONSI N
13
_ ^
T
151 ¬ «
V1b
M ANSKE DR
K
RD De N eveu Cree k
VA LLE CT Y
EE
CR VALLEY
K
" )
45
GLACIER CT
_ ^
EMERY LA
D1
3
7
LA
8
_ ^
St ud y AreaBound ary
RU N
D2e
Munic ipalBound ary Parc elLine
DONDORD
St ream ( DNR)
D2c
Surfac eWat er Sourc e:Fond d uLac Count y,201516;WDNR,2013.
D2e
_ ^ D4
Lake De Neveu
11
H
" )
H
" )
0
D5
DrainageAreaand I D
Dis c laim er:Thepropert y lines ,right ofway lines ,and ot her propert y inform at ion on t his d rawing wered eveloped or ob t ained as partoft he Count y Geographic I nform at ion Sys t em or t hrough t heCount y propert yt axm apping func t ion.Mc MAHO NASSO CI ATES,I NC.d oes not guarant eet his inform at ion t o b ec orrec t ,c urrent ,or c om plet e. Thepropert y and right ofway inform at ion areonly int end ed for us eas a generalreferenc eand arenotint end ed or s uit ab lefor s it es pec ific us es . Any us et ot hec ont rary oft heab ov es t at ed us es is t heres pons ib ilit y oft heus er and s uc h us eis att heus er’s own ris k .
D3
10
DENEVE U HN EJO
DR
D2d
I 800
1, 600
Feet
N1
_ ^
OAK HILL RD
CLUB DENEVEU DR
N1
6
_ ^ _9 ^
PointofI nt eres t
_ ^
_ ^
D2a
_ ^
OV ERLAND TR
D2b
5
N2
L EI K M
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Augus t1 1,2017 k pk
_ ^
VUE CT
PHEASA NT
_ ^
R
2
LAC
4
SUMMIT CT
RAD EM
REINHARDT RD
_ ^
P CT ETO DG LE
K
" )
Other Mapped Features
WHITETAIL CT
1
GE
1
Devils Lake
N DR AN
100Y ear Flood ing Lim it s
Town of Empire
RI D TIMB ER DR
Town of Fond du Lac
10Y ear Flood ing Lim it s
V1a
_ ^
BOYKE DR
£ ¤
12
GRANDVIEW RD
K
" )
EC W INNVU T
NC
LEDGETOP DR
ALL A
SUMMIT DR
FI GURE13 2015 FLOODING LIMITS LAKEDENEVEU STO RMWATERMANAGEMENTPLAN TO WNO FEMPI RE FO NDDULACCO UNTY ,WI SCO NSI N
T
151 ¬ «
V1b
K
!! 2
Discharge at creek at downstream end of Reinhardt Road bridge
45
Town of Empire
K
) £ ¤"
Devils Lake V1a
RADE
N DR AN M
!! 2
54" Storm Sewer
K
" ) !!! 2 2 !
REINHARDT RD
54" Storm Sewer
P CT ETO DG LE
D e C Ne re ve ek u
EE
CR VALLEY
Town of Fond du Lac
GLACI ER CT
KR D
VA LLE CT Y
M ANSKE DR
" )
L AC
CV-D2a
!! 2 @ !
V UE CT
OV ERLAND TR
24" Storm Sewer
!! 2
RU N
D1 CV-D3
D2c
Dra ina ge Area a ndI D Culv erta ndI D
Munic ip a lBounda ry Pa rc elLine
St rea m ( DN R) Surfa c e W a t er
!! 2
CV-D2d
!! 2
CV-D3
LA
EME RY LA
DENEVE U
D4
H
" ) 0
H
" ) CV-D5 SUMMIT CT
HN EJO
DR
Lake De Neveu
Discla im er:The p rop ert y lines,right ofwa y lines ,a ndot her p rop ert y inform a t ion on t hisdra wing were develop edor ob t a ineda sp a rtoft he Count y Geogra p hic I nform a t ion Syst em or t hrough t he Count y p rop ert yt a x m a p p ing func t ion.Mc MAHON ASSOCI ATES,I N C.doesnot gua ra nt ee t hisinform a t ion t o b e c orrec t ,c urrent ,or c om p let e. The p rop ert y a ndright ofwa y inform a t ion a re only int endedfor use a sa genera lreferenc e a nda re notint endedor s uit a b le for s it es p ec ific us es. Any use t ot he c ont ra ry oft he a b ov e st at edus esist he resp onsib ilit y oft he us er a nds uc h use isa tt he us er’ sown risk.
D3
CV-D4
D1
Sourc e:FondduLa c Count y,201516;W DN R,2013.
D2d D2e
D5 OAK H ILL RD
CLUB DENEVEU DR
N1
L EI K M
w: \ PROJ ECTS\ F0983\ 91700160\ CADD\ GI S\ La ke DeN eveu\ SW MP_Ma p s \ Figure14_B. m xd August1 1,2017 kp k
PHEASA NT
DR OR ND DO
N2
Other Mapped Features
WHITETAIL CT
D2b
CV-D2b !! 2
Prop os ed Alt erna t iv e
St udy Area Bounda ry
D2a
!! 2
@ !
GRANDVIEW RD
NC
EC W INNVU T
ALL A
SUMMIT DR
I 800
1, 600
Feet
N1
FI GURE14 ALTERNATIVE 1 LAKEDEN EVEU STORMW ATERMAN AGEMEN TPLAN TOW N OFEMPI RE FON DDULACCOUN TY ,W I SCON SI N
T
151 ¬ «
V1b
M ANSKE DR
KR
De Nev D eu Creek
VA LLE CT Y
EE
CR VALLEY
" )
45
" )
REINHARDT RD !! 2 !! 2
Discharge at creek at downstream end of CTH 'K' culvert
24" Storm Sewer or Culvert
Ravine Dam Max Height = 18.5' Max Storage = 30.6 ac-ft
R
CV-D2a
!@ 2! !
CV-D2b !! 2
N2
D2a
!! 2
LAC
LA
DENEVE U
D1
Lake De Neveu
CV-D5
HN EJO
SUMMIT CT
L EI K M DR
D4
RU N
Other Mapped Features
St ud y AreaBound ary
D1
St ream ( DNR) Surfac eWat er
H
0
D5
Munic ipalBound ary Parc elLine
DONDORD
" )
H
DrainageAreaand I D
Dis c laim er:Thepropert y lines ,right ofway lines ,and ot her propert y inform at ion on t his d rawing wered eveloped or ob t ained as partoft he Count y Geographic I nform at ion Sys t em or t hrough t heCount y propert yt axm apping func t ion.Mc MAHO NASSO CI ATES,I NC.d oes not guarant eet his inform at ion t o b ec orrec t ,c urrent ,or c om plet e. Thepropert y and right ofway inform at ion areonly int end ed for us eas a generalreferenc eand arenotint end ed or s uit ab lefor s it es pec ific us es . Any us et ot hec ont rary oft heab ov es t at ed us es is t heres pons ib ilit y oft heus er and s uc h us eis att heus er’s own ris k .
D3
" )
Culv ertand I D
Sourc e:Fond d uLac Count y,201516;WDNR,2013.
D2d D2e
I 800
1, 600
Feet
N1
OAK HILL RD
CLUB DENEVEU DR
N1
Propos ed Alt ernat iv e Rav ineDam St orage
D2c
CV-D3
CV-D4
D2b
VUE CT
24" Storm CV-D2d Sewer
!! 2
EMERY LA
PHEASA NT
R
24" Storm Sewer or Grass Ditch
!! 2
Augus t1 1,2017 k pk
O VERLAN DT
GE
K
!! 2
w: \PRO J ECTS\F0983\91700160\CADD\GI S\LakeDeNeveu\SWMP_Maps \Figure15_B. m xd
24" Storm Sewer
24" Storm Sewer or Grass Ditch
P CT ETO DG LE
N DR AN
V1a
@ !
CV-D3
WHITETAIL CT
24" Culvert RI D TIMB ER DR
Town of Fond du Lac RAD EM
Devils Lake
BOYKE DR
£ ¤
!! 2
Town of Empire
K
GRANDVIEW RD
K
" )
EC W INNVU T
NC
LEDGETOP DR
ALL A
SUMMIT DR
FI GURE15 ALTERNATIVE 2 LAKEDENEVEU STO RMWATERMANAGEMENTPLAN TO WNO FEMPI RE FO NDDULACCO UNTY ,WI SCO NSI N
T
151 ¬ «
V1b
K
£ ¤
V1a
N DR AN
GE RID DR
RAD EM
Devils Lake
REINHARDT RD
!! 2
D4
D1
Lake De Neveu
CV-D5
WetDet ent ion Pond
RU N
Other Mapped Features
St ud y AreaBound ary
D1
Munic ipalBound ary St ream ( DNR) Surfac eWat er
H
0
HN EJO
SUMMIT DR
DrainageAreaand I D Parc elLine
" ) D5
Culv ertand I D
Dis c laim er:Thepropert y lines ,right ofway lines ,and ot her propert y inform at ion on t his d rawing wered eveloped or ob t ained as partoft he Count y Geographic I nform at ion Sys t em or t hrough t heCount y propert yt axm apping func t ion.Mc MAHO NASSO CI ATES,I NC.d oes not guarant eet his inform at ion t o b ec orrec t ,c urrent ,or c om plet e. Thepropert y and right ofway inform at ion areonly int end ed for us eas a generalreferenc eand arenotint end ed or s uit ab lefor s it es pec ific us es . Any us et ot hec ont rary oft heab ov es t at ed us es is t heres pons ib ilit y oft heus er and s uc h us eis att heus er’s own ris k .
H
" )
Propos ed Alt ernat iv e
Sourc e:Fond d uLac Count y,201516;WDNR,2013.
D2d
D3
CV-D4
SUMMIT CT
LA
24" Storm Sewer or Culvert
OAK H ILL RD
L EI K M DR
Quarry Pond conversion to wet detention pond
!! 2
DENEVE U
N1
D2b
D2e
!! 2
Discharge to Lake De Neveu
PHEASA NT
D2c
CV-D3
EME RY LA
V UE CT
CV-D2b
CV-D2d
CLUB DENEVEU DR
Augus t1 1,2017 k pk
Discharge to Lake De Neveu
!! 2
L AC
CV-D3
WHITETAIL CT
OV ERLAND TR
@ !
DR OR ND DO
! 2 !
w: \PRO J ECTS\F0983\91700160\CADD\GI S\LakeDeNeveu\SWMP_Maps \Figure16_B. m xd
D2a
30" Storm Sewer
CV-D2a
N2
P CT ETO DG LE
" )
" )
TIMB ER
Town of Fond du Lac
K
!! 2
Town of Empire
K
GLACI ER CT
KR
EE
CR VALLEY
45
BOYKE DR
De Nev D eu Creek
VA LLE CT Y
M ANSKE DR
" )
GRANDVIEW RD
NC
EC W INNVU T
ALL A
I 800
1, 600
Feet
N1
FI GURE16 ALTERNATIVE 3 LAKEDENEVEU STO RMWATERMANAGEMENTPLAN TO WNO FEMPI RE FO NDDULACCO UNTY ,WI SCO NSI N