B-04 (SP-2020-0228D - Brushy Creek Regional Utility Authority Raw Water Pump Station).pdf — original pdf

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SITE PLAN REVIEW SHEET ENVIRONMENTAL VARIANCE REQUEST ONLY ZAP COMMISSION DATE: 01/05/2021 CASE: SP-2020-0228D PROJECT NAME: Brushy Creek Regional Utility Authority Raw Water Pump Station APPLICANT: Brushy Creek Regional Utility Authority ADDRESS OF SITE: 9416 Lime Creek Road, Leander, TX 78641 COUNTY: Travis WATERSHED: Lake Travis EXISTING ZONING: N/A (2-Mile ETJ) PROPOSED DEVELOPMENT: The applicant proposes a building, parking, water quality controls, and JURISDICTION: 2-Mile ETJ AGENT: Karen Bondy AREA: 1.65 acres construction staging area for raw water pump station. DESCRIPTION OF VARIANCE: The applicant requests the following: 1. Request to vary from LDC 25-8-301 to construct private driveways crossing slopes in excess of 15 percent 2. Request to vary from LDC 25-8-302(A) to construct a surface parking lot on slopes in excess of 15 percent 3. Request to vary from LDC 25-8-302(B) to construct a building on slopes in excess of 25 percent gradient, and exceed impervious cover allowance on slopes with a gradient of more than 15 percent. 4. Request to vary from LDC 25-8-342 to allow fill in excess of four feet in the Drinking Water Protection 5. Request to vary from LDC 25-8-453(D)(1) to allow impervious cover in excess of 20 percent Net Site gradient. gradient. Zone. Area. STAFF RECOMMENDATION: Staff recommends that the required findings of fact have been met. ENVIRONMENTAL BOARD ACTION: 12/02/2020: The Environmental Board voted in (8) favor, (0) against, (0) absentia ZONING AND PLATTING COMMISSION ACTION: ENVIRONMENTAL REVIEW STAFF: Jonathan Garner CASE MANAGER: Robert Anderson PHONE: 512-974-3026 PHONE: 512-974-1665 1 of 39B-04ENVIRONMENTAL COMMISSION MOTION 20201202 002a Subject: Brushy Creek Regional Utility Authority Raw Water Pump Station, SP-2020-0228D Motion by: Katie Coyne Seconded by: Wendy Gordon Date: December 2, 2020 RATIONALE: 2. WHEREAS, the Environmental Commission recognizes the applicant is requesting five variances from code including: 1. Request to vary from LDC 25-8-301 to construct private driveways crossing slopes in excess of 15 percent gradient Request to vary from LDC 25-8-302(A) to construct a surface parking lot on slopes in excess of 15 percent gradient Request to vary from LDC 25-8-302(B) to construct a building on slopes in excess of 25 percent gradient and exceed impervious cover allowance on slopes with a gradient of more than 15 percent Request to vary from LDC 25-8-342 to allow fill in excess of four feet in the Drinking Water Protection Zone Request to vary from LDC 25-8-453(D)(1) to allow impervious cover in excess of 20 percent Net Site Area 5. 4. 3. WHEREAS, the Environmental Commission recognizes the site is located at 9416 Lime Creek Road, Leander, Texas in the City of Austin Extraterritorial Jurisdiction; and WHEREAS, the Environmental Commission recognizes that staff recommends this variance (with conditions) having determined the required Findings of Fact have been met. THEREFORE, the Environmental Commission recommends the variance request with the following; Staff Condition: 1. Restoration of disturbed areas within the 40% Natural Area Buffer shall be subject to ECM Appendix A criteria Provide robust temporary and permanent erosion and sedimentation controls downgradient of the proposed development beyond the minimum standard Provide dense screening vegetation in compliance with ECM 2.9.0 for all pervious areas between the building and mechanical equipment and the right-of-way. 3. 2. 1 2 of 39B-04VOTE 8-0 For: Gordon, Neely, Bedford, Thompson, Smith, Guerrero, Coyne, Maceo Against: None Abstain: None Recuse: Ramberg Absent: Creel, Nill Approved By: Linda Guerrero, Environmental Commission Chair 2 3 of 39B-04 Staff Findings of Fact 4 of 39B-04 Development Services Department Staff Recommendations Concerning Required Findings Project Name: Brushy Creek Regional Utility Authority Raw Water Pump Station Ordinance Standard: Watershed Protection Ordinance Variance Request: 1. Request to vary from LDC 25-8-301 to construct private driveways crossing slopes in excess of 15 percent gradient. 2. Request to vary from LDC 25-8-302(A) to construct a surface parking lot on slopes in excess of 15 percent gradient. 3. Request to vary from LDC 25-8-302(B) to construct a building on slopes in excess of 25 percent gradient, and exceed impervious cover allowance on slopes with a gradient of more than 15 percent. 4. Request to vary from LDC 25-8-342 to allow fill in excess of four feet in the Drinking Water Protection Zone. 5. Request to vary from LDC 25-8-453(D)(1) to allow impervious cover in excess of 20 percent Net Site Area. Include an explanation with each applicable finding of fact. A. Land Use Commission variance determinations from Chapter 25-8-41 of the City Code: 1. The requirement will deprive the applicant of a privilege available to owners of similarly situated property with approximately contemporaneous development subject to similar code requirements. Yes. Brushy Creek Regional Utility Authority (BCRUA) is a non-profit local government corporation and a partnership of the cities of Cedar Park, Leander, and Round Rock that treats and distributes water from the Lower Colorado River Authority (LCRA) to residents and businesses of the partner cities. The Lower Colorado River Authority (LCRA) was the original owner of the property, and in planning the expansion of services, the subject property was the largest and least sloped property that LCRA would convey to BCRUA (see aerial exhibit, page 32). Due to the unique engineering and other features associated with treatment of raw water, the facility must be located within certain proximity to Lake Travis. There is not another available property along Lake Travis in this vicinity that is larger in area or flatter in topography that would allow the proposed raw water pump station to be relocated. Conversely, relocating the raw water pump station significantly away from Lake Travis to provide for larger site area and flatter topography would require more extensive engineering, a larger carbon footprint for operations, and tunneling that has 5 of 39B-04potential to cause greater overall environmental disturbance; both during construction and long-term operations and maintenance. 2. The variance: a) b) Is not necessitated by the scale, layout, construction method, or other design decision made by the applicant, unless the design decision provides greater overall environmental protection than is achievable without the variance; Yes. All the proposed construction on the site requiring the variances is necessitated by the scale of the property and the site constraints of the existing topography (see Overall Existing Conditions exhibit, page 33). The relative small area of the site is due to the parceling of the site by LCRA, and is the only property along Lake Travis that was conveyed to BCRUA for this facility. Despite the topographic challenges of the property, the site plan provides for greater overall environmental protection by reducing the amount of parking spaces, drive/fire lanes, and fill to construct these features to only the minimum required for the functioning of the facility or that allowed by Travis County fire regulations (see Dimensioned Site Plan exhibit, page 34). The location of the parking lot and the building take advantage of natural topography and are located on the least sloped areas of the site; maintaining natural drainage patterns to the best extent feasible and minimizing the total amount of fill required to provide a level construction area. This facility will capture and treat rainwater from the building to add to the raw water processing, and all other impervious cover will be conveyed and treated in biofiltration media in the water quality ponds allowing for infiltration draw down of the water quality pond rather than only treatment and release into Lake Travis. Is the minimum deviation from the code requirement necessary to allow a reasonable use of the property; Yes. The pump station building, electric transformer yard, surface parking lot, two drive/fire lanes, and sidewalk are the minimum site construction features for the functioning of the facility. The raw water pipelines are located under the building and tunneled into the lake at an elevation about 200 feet below the shoreline of Lake Travis. The water quality and storm water detention controls are located on the site in a way that takes advantage of the natural topography for both overland drainage and outfall disbursement. The building will be constructed with stem walls that minimize the depth of backslope away from the building foundation to less than four feet. The surface parking and drive/fire lanes are the only site features that require the excess fill material, to the extent as needed to satisfy the 6 of 39B-04maximum allowed gradient set by Travis County fire regulations (see Fill Exhibit, page 35). The surface parking lot and the building are sited on the least sloped areas of the site, and only propose the amount of square footage necessary for the functioning of the facility to meet the projected water demands and provide safe accommodations for the employees (see Slope Exhibit, page 36). This property was the largest and least sloped property that LCRA would convey to BCRUA. Because the property is small and severely sloped, the Net Site Area calculation significantly reduces the available uplands for the purposes of calculating impervious cover. The size of the building is necessitated by the operational requirements of the proposed public water supply, and the parking lot and driveways are the minimum necessary for the number of employees required for the functioning of the facility. However, with the construction of this project, three existing floating raw water intake structures on barges will be removed from Lake Travis, and the half-acre roof of the pump station will be used to capture rainwater that will be used in the processing of the raw water for the available public drinking water supply. If rainwater harvesting credits were allowed to offset the proposed impervious cover, the project’s proposed impervious cover could be calculated as 34 percent Net Site Area rather than 90 percent Net Site Area. Additionally, with the construction of this project, an adjacent 2,500 s.f. portion of existing impervious cover on Lime Creek Road will be treated for water quality on-site rather than draining directly into Lake Travis untreated. Does not create a significant probability of harmful environmental consequences. Yes. During construction of the site features, existing and proposed slopes will be structurally contained or restored to the extent feasible, and additional temporary and permanent erosion controls beyond the minimum requirement will be used. The site will treat adjacent untreated impervious cover from Lime Creek Road, the building roof runoff will be captured, treated, and included in the processing of the raw water for water supply, and the water quality pond proposes biofiltration media that provides for additional infiltration benefits. c) 3. Development with the variance will result in water quality that is at least equal to the water quality achievable without the variance. Yes. The proposed development will be treating stormwater runoff from the impervious cover on-site, providing permanent erosion and sedimentation controls to minimize or eliminate erosion downgradient of the proposed development from entering Lake Travis, and will be providing water quality treatment and detention for a 2,500 s.f. area of off-site impervious cover from Lime Creek Road. The site will comply with the 40 percent natural area buffer located in the uplands and downgradient of the proposed site construction. This 7 of 39B-04buffer preserves and/or restores natural vegetation, soils, and topography to serve receive overland drainage from the developed areas for water quality benefits, and provides a natural vegetative buffer and setting for the developed area to fit more naturally into the landscape and be screened from lake users (see Restoration Exhibit, page 37). B. The Land Use Commission may grant a variance from a requirement of Section 25-8-422 (Water Supply Suburban Water Quality Transition Zone), Section 25-8-452 (Water Supply Rural Water Quality Transition Zone), Section 25-8-482 (Barton Springs Zone Water Quality Transition Zone), Section 25-8-368 (Restrictions on Development Impacting Lake Austin, Lady Bird Lake, and Lake Walter E. Long), or Article 7, Division 1 ( Critical Water Quality Zone Restrictions ), after determining that:: The criteria for granting a variance in Subsection (A) are met; N/A. 1. 2. 3. The requirement for which a variance is requested prevents a reasonable, economic use of the entire property; N/A. The variance is the minimum deviation from the code requirement necessary to allow a reasonable, economic use of the entire property. N/A. Staff Determination: Staff determines that the findings of fact have been met. Staff recommends the following conditions: 8 of 39B-04 Application Form 9 of 39B-04November 9, 2020 ENVIRONMENTAL COMMISSION VARIANCE APPLICATION FORM PROJECT DESCRIPTION Applicant Contact Information Name of Applicant Karen Bondy, General Manager Brushy Creek Regional Utility Authority Street Address 221 E Main Street City State ZIP Code Work Phone E-Mail Address Round Rock, Texas 78664 512-215-9151 kbondy@bcrua.org Variance Case Information Case Name Case Number Address or Location Environmental Reviewer Name Environmental Resource Management Reviewer Name Applicable Ordinance SP-2020-0228D Jonathan Garner Michael Markowski Brushy Creek Regional Utility Authority Raw Water Pump Station 9416 Lime Creek Road, Leander, Texas 78641 Watershed Protection Ordinance Watershed Name Lake Travis Watershed Classification ☐Urban ☐ Suburban ☐Water Supply Suburban ☑Water Supply Rural ☐ Barton Springs Zone City of Austin | Environmental Commission Variance Application Guide 1 10 of 39B-04November 9, 2020 Edwards Aquifer Recharge Zone ☐ Barton Springs Segment ☐ Northern Edwards Segment ☑ Not in Edwards Aquifer Zones Edwards Aquifer Contributing Zone Distance to Nearest Classified Waterway ☐ Yes ☑ No The west property line is within 300 feet of the Elevation 681 contour of Lake Travis. Water and Waste Water service to be provided by City of Cedar Park (water), No sanitary wastewater will be generated. Greywater from floor drains will be pumped from a holding tank. Request The variance request is as follows (Cite code references): 25-8-301, to construct private driveways crossing slopes in excess of 15 percent gradient. Impervious cover square footage: acreage: percentage: Provide general description of the property (slope range, elevation range, summary of vegetation / trees, summary of the geology, CWQZ, WQTZ, CEFs, floodplain, heritage trees, any other notable or outstanding characteristics of the property) Existing 1,100 s.f. 0.025 ac 1.50 % Proposed 33,787 s.f 0.776 ac 46.04 % BCRUA is a non-profit local government corporation that provides treated water to the cities of Cedar Park, Leander and Round Rock. The partnership between these three cities provides a regional water supply for the community. The Raw Water Pump Station (RWPS) site contains 1.685 acres and is located east of the Sandy Creek arm of Lake Travis on Lime Creek Road. This size is the largest and flattest area that LCRA would convey to BCRUA in 2014. By comparison, the proposed RWPS buildings occupy over 0.6 acres. Over 60% of the site is steeper than 15% slope and over 20% of the site is steeper than 35% slope. The elevation ranges from 792 at Lime Creek Road to 745 at the southwest corner of the site. The existing land use includes part of Travis County’s Sandy Creek Park and PEC electric distribution lines and transformer. The adjacent site to the south contains the City of Cedar Park’s water treatment plant. The vegetation is a mix of grasses, understory vegetation and mostly Ashe juniper trees with some live oak trees. None of the live oaks are heritage trees. The Upper Glen Rose limestone formation is exposed on the site. There are no CEFs on the site as determined by the Environmental Resource Inventory prepared last year. About 6% of the western edge of the site is within 300 feet of the Elevation 681 contour at Lake Travis and therefore is within the Water Quality Transition Zone. No part of the site is within the Critical Water Quality Zone. City of Austin | Environmental Commission Variance Application Guide 2 11 of 39B-04November 9, 2020 Clearly indicate in what way the proposed project does not comply with current Code (include maps and exhibits) FINDINGS OF FACT § 25-8-301 - CONSTRUCTION OF A ROADWAY OR DRIVEWAY About 0.03 acres (1,260 s.f.) of fire lanes must be constructed on slopes greater than 15% on the north and south sides of the proposed RWPS building to comply with Travis County fire regulations. As required in LDC Section 25-8-41, in order to grant a variance the Land Use Commission must make the following findings of fact: Include an explanation with each applicable finding of fact. Project: Brushy Creek Regional Utility Authority Raw Water Pump Station Ordinance: 25-8-301 - CONSTRUCTION OF A ROADWAY OR DRIVEWAY A. 1. Land Use Commission variance determinations from Chapter 25-8-41 of the City Code: The requirement will deprive the applicant of a privilege available to owners of similarly situated property with approximately contemporaneous development subject to similar code requirements. Yes / No BCRUA used its best efforts to locate and acquire a property larger in size with flatter terrain in 2014. This site is the largest and flattest site available that LCRA would convey to BCRUA. This project is a raw water pump station, which has unique engineering and other features and requires close proximity to Lake Travis. On behalf of the cities of Cedar Park, Leander and Round Rock, the BCRUA is working diligently with the LCRA to provide the community with water. Similarly situated property with flatter terrain would not be subject to the same limitations imposed by Section 25-8-301. 2. The variance: a) Is not necessitated by the scale, layout, construction method, or other design decision made by the applicant, unless the design decision provides greater overall environmental protection than is achievable without the variance; Yes / No the proposed regional public water supply use. The variance is necessitated by the operational requirements of City of Austin | Environmental Commission Variance Application Guide 3 12 of 39B-04November 9, 2020 b) c) Is the minimum deviation from the code requirement necessary to allow a reasonable use of the property; Yes / No County fire regulations are proposed. The minimum extent of fire lanes which comply with Travis Does not create a significant probability of harmful environmental consequences. Yes / No using permanent erosion control and soil retention blankets. All proposed slopes will be structurally contained or restored Development with the variance will result in water quality that is at least equal to the water quality achievable without the variance. Yes / No the site that complies with the City of Austin Environmental Criteria Manual. Structural water quality control (bio-filtration) is proposed for B. Additional Land Use Commission variance determinations for a requirement of Section 25-8-422 (Water Quality Transition Zone), Section 25-8-452 (Water Quality Transition Zone), Article 7, Division 1 (Critical Water Quality Zone Restrictions), or Section 25-8-368 (Restrictions on Development Impacting Lake Austin, Lady Bird Lake, and Lake Walter E. Long): The criteria for granting a variance in Subsection (A) are met; Yes / No No variances for Part B are requested. The requirement for which a variance is requested prevents a reasonable, economic use of the entire property; Yes / No No variances for Part B are requested. The variance is the minimum deviation from the code requirement necessary to allow a reasonable, economic use of the entire property. Yes / No No variances for Part B are requested. **Variance approval requires all above affirmative findings. 3. 1. 2. 3. City of Austin | Environmental Commission Variance Application Guide 4 13 of 39B-04 Application Form Variance to LDC 25-8-302(A) 14 of 39B-04November 9, 2020 ENVIRONMENTAL COMMISSION VARIANCE APPLICATION FORM PROJECT DESCRIPTION Applicant Contact Information Name of Applicant Karen Bondy, General Manager Brushy Creek Regional Utility Authority Street Address 221 E Main Street City State ZIP Code Work Phone E-Mail Address Round Rock, Texas 78664 512-215-9151 kbondy@bcrua.org Variance Case Information Case Name Case Number Address or Location Environmental Reviewer Name Environmental Resource Management Reviewer Name Applicable Ordinance SP-2020-0228D Jonathan Garner Michael Markowski Brushy Creek Regional Utility Authority Raw Water Pump Station 9416 Lime Creek Road, Leander, Texas 78641 Watershed Protection Ordinance Watershed Name Lake Travis Watershed Classification ☐Urban ☐ Suburban ☐Water Supply Suburban ☑Water Supply Rural ☐ Barton Springs Zone City of Austin | Environmental Commission Variance Application Guide 1 15 of 39B-04November 9, 2020 Edwards Aquifer Recharge Zone ☐ Barton Springs Segment ☐ Northern Edwards Segment ☑ Not in Edwards Aquifer Zones Edwards Aquifer Contributing Zone Distance to Nearest Classified Waterway ☐ Yes ☑ No The west property line is within 300 feet of the Elevation 681 contour of Lake Travis. Water and Waste Water service to be provided by City of Cedar Park (water), No sanitary wastewater will be generated. Greywater from floor drains will be pumped from holding tank. Request The variance request is as follows (Cite code references): 25-8-302(A), to construct a surface parking lot on slopes in excess of 15 percent gradient. Impervious cover square footage: acreage: percentage: Provide general description of the property (slope range, elevation range, summary of vegetation / trees, summary of the geology, CWQZ, WQTZ, CEFs, floodplain, heritage trees, any other notable or outstanding characteristics of the property) Existing 1,100 s.f. 0.025 ac 1.50 % Proposed 33,787 s.f 0.776 ac 46.04 % BCRUA is a non-profit local government corporation that provides treated water to the cities of Cedar Park, Leander and Round Rock. The partnership between these three cities provides a regional water supply for the community. The Raw Water Pump Station (RWPS) site contains 1.685 acres and is located east of the Sandy Creek arm of Lake Travis on Lime Creek Road. This size is the largest and flattest area that LCRA would convey to BCRUA in 2014. By comparison, the proposed RWPS buildings occupy 0.63 acres. Over 60% of the site is steeper than 15% slope and over 20% of the site is steeper than 35% slope. The elevation ranges from 792 at Lime Creek Road to 745 at the southwest corner of the site. The existing land use includes part of Travis County’s Sandy Creek Park and PEC electric distribution lines and transformer. The adjacent site to the south contains the City of Cedar Park’s water treatment plant. The vegetation is a mix of grasses, understory vegetation and mostly Ashe juniper trees with some live oak trees. None of the live oaks are heritage trees. The Upper Glen Rose limestone formation is exposed on the site. There are no CEFs on the site as determined by the Environmental Resource Inventory prepared last year. About 6% of the western edge of the site is within 300 feet of the Elevation 681 contour at Lake Travis and therefore is within the Water Quality Transition Zone. No part of the site is within the Critical Water Quality Zone. City of Austin | Environmental Commission Variance Application Guide 2 16 of 39B-04November 9, 2020 Clearly indicate in what way the proposed project does not comply with current Code (include maps and exhibits) § 25-8-302 - CONSTRUCTION OF A BUILDING OR PARKING AREA (A) A person may not construct: (1) a building or parking structure on a slope with a gradient of more than 25 percent; A maximum depth of 32’ along the west side of the main RWPS building must be constructed on slopes greater than 25%. This equals 0.16 acres, or about 27% of the main building area. FINDINGS OF FACT As required in LDC Section 25-8-41, in order to grant a variance the Land Use Commission must make the following findings of fact: Include an explanation with each applicable finding of fact. Project: Brushy Creek Regional Utility Authority Raw Water Pump Station Ordinance: 25-8-302 (A) - CONSTRUCTION OF A BUILDING OR PARKING AREA Land Use Commission variance determinations from Chapter 25-8-41 of the City Code: A. 1. The requirement will deprive the applicant of a privilege available to owners of similarly situated property with approximately contemporaneous development subject to similar code requirements. Yes / No BCRUA used its best efforts to locate and acquire a property larger in size with flatter terrain in 2014. This site is the largest and flattest site available that LCRA would convey to BCRUA. This project is a raw water pump station, which has unique engineering and other features and requires close proximity to Lake Travis. On behalf of the cities of Cedar Park, Leander and Round Rock, the BCRUA is working diligently with the LCRA to provide the community with water. Similarly situated property with flatter terrain would not be subject to the same limitations imposed by Section 25-8-302(A). 2. The variance: a) Is not necessitated by the scale, layout, construction method, or other design decision made by the applicant, unless the design decision provides greater overall environmental protection than is achievable without the variance; City of Austin | Environmental Commission Variance Application Guide 3 17 of 39B-04November 9, 2020 Yes / No the proposed regional public water supply use. The variance is necessitated by the operational requirements of Is the minimum deviation from the code requirement necessary to allow a reasonable use of the property; Yes / No The building is positioned as close to Lime Creek Road and away from the steepest slopes on the site as possible. Only six parking spaces and the approach for a truck loading dock are located between the building and the right of way of Lime Creek Road. Does not create a significant probability of harmful environmental consequences. Yes / No to the slopes exceeding 15%. The main RWPS building will be structurally contained adjacent Development with the variance will result in water quality that is at least equal to the water quality achievable without the variance. Yes / No be harvested and pumped to the BCRUA water treatment plant. All rainfall runoff from the roof of the main RWPS building will b) c) B. Additional Land Use Commission variance determinations for a requirement of Section 25-8-422 (Water Quality Transition Zone), Section 25-8-452 (Water Quality Transition Zone), Article 7, Division 1 (Critical Water Quality Zone Restrictions), or Section 25-8-368 (Restrictions on Development Impacting Lake Austin, Lady Bird Lake, and Lake Walter E. Long): The criteria for granting a variance in Subsection (A) are met; Yes / No No variances for Part B are requested. The requirement for which a variance is requested prevents a reasonable, economic use of the entire property; Yes / No No variances for Part B are requested. The variance is the minimum deviation from the code requirement necessary to allow a reasonable, economic use of the entire property. Yes / No No variances for Part B are requested. **Variance approval requires all above affirmative findings. City of Austin | Environmental Commission Variance Application Guide 4 3. 1. 2. 3. 18 of 39B-04 Application Form 19 of 39B-04November 9, 2020 ENVIRONMENTAL COMMISSION VARIANCE APPLICATION FORM PROJECT DESCRIPTION Applicant Contact Information Name of Applicant Karen Bondy, General Manager Brushy Creek Regional Utility Authority Street Address 221 E Main Street City State ZIP Code Work Phone E-Mail Address Round Rock, Texas 78664 512-215-9151 kbondy@bcrua.org Variance Case Information Case Name Case Number Address or Location Environmental Reviewer Name Environmental Resource Management Reviewer Name Applicable Ordinance SP-2020-0228D Jonathan Garner Michael Markowski Brushy Creek Regional Utility Authority Raw Water Pump Station 9416 Lime Creek Road, Leander, Texas 78641 Watershed Protection Ordinance Watershed Name Lake Travis Watershed Classification ☐Urban ☐ Suburban ☐Water Supply Suburban ☑Water Supply Rural ☐ Barton Springs Zone City of Austin | Environmental Commission Variance Application Guide 1 20 of 39B-04November 9, 2020 Edwards Aquifer Recharge Zone ☐ Barton Springs Segment ☐ Northern Edwards Segment ☑ Not in Edwards Aquifer Zones Edwards Aquifer Contributing Zone Distance to Nearest Classified Waterway ☐ Yes ☑ No The west property line is within 300 feet of the Elevation 681 contour of Lake Travis. Water and Waste Water service to be provided by City of Cedar Park (water), No sanitary wastewater will be generated. Greywater from floor drains will be pumped from holding tank. The variance request is as follows (Cite code references): 25-8-302(B), to construct a building on slopes in excess of 25 percent gradient, and exceed impervious cover allowance on slopes with a gradient of more than 15 percent. Existing 1,100 s.f. 0.025 ac 1.50 % Proposed 33,787 s.f 0.776 ac 46.04 % BCRUA is a non-profit local government corporation that provides treated water to the cities of Cedar Park, Leander and Round Rock. The partnership between these three cities provides a regional water supply for the community. The Raw Water Pump Station (RWPS) site contains 1.685 acres and is located east of the Sandy Creek arm of Lake Travis on Lime Creek Road. This size is the largest and flattest area that LCRA would convey to BCRUA in 2014. By comparison, the proposed RWPS buildings occupy 0.63 acres. Over 60% of the site is steeper than 15% slope and over 20% of the site is steeper than 35% slope. The elevation ranges from 792 at Lime Creek Road to 745 at the southwest corner of the site. The existing land use includes part of Travis County’s Sandy Creek Park and PEC electric distribution lines and transformer. The adjacent site to the south contains the City of Cedar Park’s water treatment plant. The vegetation is a mix of grasses, understory vegetation and mostly Ashe juniper trees with some live oak trees. None of the live oaks are heritage trees. The Upper Glen Rose limestone formation is exposed on the site. There are no CEFs on the site as determined by the Environmental Resource Inventory prepared last year. About 6% of the western edge of the site is within 300 feet of the Elevation 681 contour at Lake Travis and therefore is within the Water Quality Transition Zone. No part City of Austin | Environmental Commission Variance Application Guide 2 Request Impervious cover square footage: acreage: percentage: Provide general description of the property (slope range, elevation range, summary of vegetation / trees, summary of the geology, CWQZ, WQTZ, CEFs, floodplain, heritage trees, any other notable or outstanding characteristics of the property) 21 of 39B-04November 9, 2020 of the site is within the Critical Water Quality Zone. § 25-8-302 - CONSTRUCTION OF A BUILDING OR PARKING AREA (B) A person may construct a building or parking structure on a slope with a gradient of more than 15 percent and not more than 25 percent if the requirements of this subsection are met. (1) Impervious cover on slopes with a gradient of more than 15 percent may not exceed 10 percent of the total area of the slopes. About 0.26 acres of the main RWPS building, or 54% of the main building area, must be constructed on slopes greater than 15%. Impervious cover on slopes steeper than 15% is 0.29 acres. Ten percent of the total area of the slopes is 0.025 acres. As required in LDC Section 25-8-41, in order to grant a variance the Land Use Commission must make the following findings of fact: Include an explanation with each applicable finding of fact. Project: Brushy Creek Regional Utility Authority Raw Water Pump Station Ordinance: 25-8-302 - CONSTRUCTION OF A BUILDING OR PARKING AREA Land Use Commission variance determinations from Chapter 25-8-41 of the City Code: The requirement will deprive the applicant of a privilege available to owners of similarly situated property with approximately contemporaneous development subject to similar code requirements. Yes / No BCRUA used its best efforts to locate and acquire a property larger in size with flatter terrain in 2014. This site is the largest and flattest site available that LCRA would convey to BCRUA. This project is a raw water pump station, which has unique engineering and other features and requires close proximity to Lake Travis. On behalf of the cities of Cedar Park, Leander and Round Rock, the BCRUA is working diligently with the LCRA to provide the community with water. Similarly situated property with flatter terrain would not be subject to the same limitations imposed by Section 25-8-302(B). City of Austin | Environmental Commission Variance Application Guide 3 Clearly indicate in what way the proposed project does not comply with current Code (include maps and exhibits) FINDINGS OF FACT A. 1. 22 of 39B-04November 9, 2020 2. The variance: a) Is not necessitated by the scale, layout, construction method, or other design decision made by the applicant, unless the design decision provides greater overall environmental protection than is achievable without the variance; Yes / No the proposed regional public water supply use. The variance is necessitated by the operational requirements of Is the minimum deviation from the code requirement necessary to allow a reasonable use of the property; The building is positioned as close to Lime Creek Road and away Yes / No from the steepest slopes on the site as possible. Only six parking spaces and the approach for a truck loading dock are located between the building and the right of way of Lime Creek Road. Does not create a significant probability of harmful environmental consequences. Yes / No to the slopes exceeding 15%. The main RWPS building will be structurally contained adjacent Development with the variance will result in water quality that is at least equal to the water quality achievable without the variance. Yes / No be harvested and pumped to the BCRUA water treatment plant. All rainfall runoff from the roof of the main RWPS building will b) c) B. Additional Land Use Commission variance determinations for a requirement of Section 25-8-422 (Water Quality Transition Zone), Section 25-8-452 (Water Quality Transition Zone), Article 7, Division 1 (Critical Water Quality Zone Restrictions), or Section 25-8-368 (Restrictions on Development Impacting Lake Austin, Lady Bird Lake, and Lake Walter E. Long): The criteria for granting a variance in Subsection (A) are met; Yes / No No variances for Part B are requested. The requirement for which a variance is requested prevents a reasonable, economic use of the entire property; Yes / No No variances for Part B are requested. The variance is the minimum deviation from the code requirement necessary to allow a reasonable, economic use of the entire property. Yes / No No variances for Part B are requested. City of Austin | Environmental Commission Variance Application Guide 4 3. 1. 2. 3. 23 of 39B-04 Applicant Exhibits 24 of 39B-04November 9, 2020 ENVIRONMENTAL COMMISSION VARIANCE APPLICATION FORM PROJECT DESCRIPTION Applicant Contact Information Name of Applicant Karen Bondy, General Manager Brushy Creek Regional Utility Authority Street Address 221 E Main Street City State ZIP Code Work Phone E-Mail Address Round Rock, Texas 78664 512-215-9151 kbondy@bcrua.org Variance Case Information Case Name Case Number Address or Location Environmental Reviewer Name Environmental Resource Management Reviewer Name Applicable Ordinance SP-2020-0228D Jonathan Garner Michael Markowski Brushy Creek Regional Utility Authority Raw Water Pump Station 9416 Lime Creek Road, Leander, Texas 78641 Watershed Protection Ordinance Watershed Name Lake Travis Watershed Classification ☐Urban ☐ Suburban ☐Water Supply Suburban ☑Water Supply Rural ☐ Barton Springs Zone City of Austin | Environmental Commission Variance Application Guide 1 25 of 39B-04November 9, 2020 Edwards Aquifer Recharge Zone ☐ Barton Springs Segment ☐ Northern Edwards Segment ☑ Not in Edwards Aquifer Zones Edwards Aquifer Contributing Zone Distance to Nearest Classified Waterway ☐ Yes ☑ No The west property line is within 300 feet of the Elevation 681 contour of Lake Travis. Water and Waste Water service to be provided by City of Cedar Park (water), No sanitary wastewater will be generated. Greywater from floor drains will be pumped from a holding tank. Request The variance request is as follows (Cite code references): 25-8-342, to allow fill in excess of four feet in the Drinking Water Protection Zone. Impervious cover square footage: acreage: percentage: Provide general description of the property (slope range, elevation range, summary of vegetation / trees, summary of the geology, CWQZ, WQTZ, CEFs, floodplain, heritage trees, any other notable or outstanding characteristics of the property) Existing 1,100 s.f. 0.025 ac 1.50 % Proposed 33,787 s.f 0.776 ac 46.04 % BCRUA is a non-profit local government corporation that provides treated water to the cities of Cedar Park, Leander and Round Rock. The partnership between these three cities provides a regional water supply for the community. The Raw Water Pump Station (RWPS) site contains 1.685 acres and is located east of the Sandy Creek arm of Lake Travis on Lime Creek Road. This size is the largest and flattest area that LCRA would convey to BCRUA in 2014. By comparison, the proposed RWPS buildings occupy over 0.6 acres. Over 60% of the site is steeper than 15% slope and over 20% of the site is steeper than 35% slope. The elevation ranges from 792 at Lime Creek Road to 745 at the southwest corner of the site. The existing land use includes part of Travis County’s Sandy Creek Park and PEC electric distribution lines and transformer. The adjacent site to the south contains the City of Cedar Park’s water treatment plant. The vegetation is a mix of grasses, understory vegetation and mostly Ashe juniper trees with some live oak trees. None of the live oaks are heritage trees. The Upper Glen Rose limestone formation is exposed on the site. There are no CEFs on the site as determined by the Environmental Resource Inventory prepared last year. About 6% of the western edge of the site is within 300 feet of the Elevation 681 contour at Lake Travis and therefore is within the Water Quality Transition Zone. No part of the site is within the Critical Water Quality Zone. City of Austin | Environmental Commission Variance Application Guide 2 26 of 39B-04November 9, 2020 Clearly indicate in what way the proposed project does not comply with current Code (include maps and exhibits) FINDINGS OF FACT § 25-8-342 - FILL REQUIREMENTS (A) Fill on a tract of land may not exceed four feet of depth. Most of the north fire lane and the west half of the south fire lane must exceed four feet of fill depth to comply with Travis County fire regulations. The area of fill greater than four feet of depth is 6,710 s.f. (A) As required in LDC Section 25-8-41, in order to grant a variance the Land Use Commission must make the following findings of fact: Include an explanation with each applicable finding of fact. Project: Brushy Creek Regional Utility Authority Raw Water Pump Station Ordinance: 25-8-342 - FILL REQUIREMENTS Land Use Commission variance determinations from Chapter 25-8-41 of the City Code: A. 1. The requirement will deprive the applicant of a privilege available to owners of similarly situated property with approximately contemporaneous development subject to similar code requirements. Yes / No BCRUA used its best efforts to locate and acquire a property larger in size with flatter terrain in 2014. This site is the largest and flattest site available that LCRA would convey to BCRUA. This project is a raw water pump station, which has unique engineering and other features and requires close proximity to Lake Travis. On behalf of the cities of Cedar Park, Leander and Round Rock, the BCRUA is working diligently with the LCRA to provide the community with water. Similarly situated property with flatter terrain would not be subject to the same limitations imposed by Section 25-8-342. 2. The variance: a) Is not necessitated by the scale, layout, construction method, or other design decision made by the applicant, unless the design decision provides greater overall environmental protection than is achievable without the variance; Yes / No the proposed regional public water supply use. The variance is necessitated by the operational requirements of City of Austin | Environmental Commission Variance Application Guide 3 27 of 39B-04November 9, 2020 b) Is the minimum deviation from the code requirement necessary to allow a reasonable use of the property; The gradient of the south fire lane will be at the maximum Yes / No allowed by Travis County fire regulations and will be structurally contained on two sides to minimize the amount of fill required. The north fire lane will be structurally contained on three sides. Does not create a significant probability of harmful environmental consequences. Yes / No using permanent erosion control and soil retention blankets. All proposed slopes will be structurally contained or restored Development with the variance will result in water quality that is at least equal to the water quality achievable without the variance. Yes / No the site that complies with the City of Austin Environmental Criteria Manual. Structural water quality control (bio-filtration) is proposed for c) B. Additional Land Use Commission variance determinations for a requirement of Section 25-8-422 (Water Quality Transition Zone), Section 25-8-452 (Water Quality Transition Zone), Article 7, Division 1 (Critical Water Quality Zone Restrictions), or Section 25-8-368 (Restrictions on Development Impacting Lake Austin, Lady Bird Lake, and Lake Walter E. Long): The criteria for granting a variance in Subsection (A) are met; Yes / No No variances for Part B are requested. The requirement for which a variance is requested prevents a reasonable, economic use of the entire property; Yes / No No variances for Part B are requested. The variance is the minimum deviation from the code requirement necessary to allow a reasonable, economic use of the entire property. Yes / No No variances for Part B are requested. **Variance approval requires all above affirmative findings. 3. 1. 2. 3. City of Austin | Environmental Commission Variance Application Guide 4 28 of 39B-04 Applicant Exhibits 29 of 39B-04November 9, 2020 ENVIRONMENTAL COMMISSION VARIANCE APPLICATION FORM PROJECT DESCRIPTION Applicant Contact Information Name of Applicant Karen Bondy, General Manager Brushy Creek Regional Utility Authority Street Address 221 E Main Street City State ZIP Code Work Phone E-Mail Address Round Rock, Texas 78664 512-215-9151 kbondy@bcrua.org Variance Case Information Case Name Case Number Address or Location Environmental Reviewer Name Environmental Resource Management Reviewer Name Applicable Ordinance SP-2020-0228D Jonathan Garner Michael Markowski Brushy Creek Regional Utility Authority Raw Water Pump Station 9416 Lime Creek Road, Leander, Texas 78641 Watershed Protection Ordinance Watershed Name Lake Travis Watershed Classification ☐Urban ☐ Suburban ☐Water Supply Suburban ☑Water Supply Rural ☐ Barton Springs Zone City of Austin | Environmental Commission Variance Application Guide 1 30 of 39B-04November 9, 2020 Edwards Aquifer Recharge Zone ☐ Barton Springs Segment ☐ Northern Edwards Segment ☑ Not in Edwards Aquifer Zones Edwards Aquifer Contributing Zone Distance to Nearest Classified Waterway ☐ Yes ☑ No The west property line is within 300 feet of the Elevation 681 contour of Lake Travis. Water and Waste Water service to be provided by City of Cedar Park (water), No sanitary wastewater will be generated. Greywater from floor drains will be pumped from a holding tank. Request The variance request is as follows (Cite code references): 25-8- 453(D)(1), to allow impervious cover in excess of 20 percent Net Site Area. Impervious cover square footage: acreage: percentage: Provide general description of the property (slope range, elevation range, summary of vegetation / trees, summary of the geology, CWQZ, WQTZ, CEFs, floodplain, heritage trees, any other notable or outstanding characteristics of the property) Existing 1,100 s.f. 0.025 ac 1.50 % Proposed 33,787 s.f 0.776 ac 46.04 % BCRUA is a non-profit local government corporation that provides treated water to the cities of Cedar Park, Leander and Round Rock. The partnership between these three cities provides a regional water supply for the community. The Raw Water Pump Station (RWPS) site contains 1.685 acres and is located east of the Sandy Creek arm of Lake Travis on Lime Creek Road. This size is the largest and flattest area that LCRA would convey to BCRUA in 2014. By comparison, the proposed RWPS buildings occupy over 0.6 acres. Over 60% of the site is steeper than 15% slope and over 20% of the site is steeper than 35% slope. The elevation ranges from 792 at Lime Creek Road to 745 at the southwest corner of the site. The existing land use includes part of Travis County’s Sandy Creek Park and PEC electric distribution lines and transformer. The adjacent site to the south contains the City of Cedar Park’s water treatment plant. The vegetation is a mix of grasses, understory vegetation and mostly Ashe juniper trees with some live oak trees. None of the live oaks are heritage trees. The Upper Glen Rose limestone formation is exposed on the site. There are no CEFs on the site as determined by the Environmental Resource Inventory prepared last year. About 6% of the western edge of the site is within 300 feet of the Elevation 681 contour at Lake Travis and therefore is within the Water Quality Transition Zone. No part of the site is within the Critical Water Quality Zone. City of Austin | Environmental Commission Variance Application Guide 2 31 of 39B-04November 9, 2020 Clearly indicate in what way the proposed project does not comply with current Code (include maps and exhibits) § 25-8-453 - UPLANDS ZONE (D) This subsection applies to a commercial, multifamily residential use, or mixed use. (1) Impervious cover may not exceed: (a) 20 percent The RWPS site is proposing 90.92% impervious cover (0.776 acres) based on a net site area of 0.854 acres. FINDINGS OF FACT As required in LDC Section 25-8-41, in order to grant a variance the Land Use Commission must make the following findings of fact: Include an explanation with each applicable finding of fact. Project: Brushy Creek Regional Utility Authority Raw Water Pump Station Ordinance: 25-8-453 - UPLANDS ZONE Land Use Commission variance determinations from Chapter 25-8-41 of the City Code: A. 1. The requirement will deprive the applicant of a privilege available to owners of similarly situated property with approximately contemporaneous development subject to similar code requirements. Yes / No BCRUA attempted to acquire property larger in size with flatter terrain in 2014. BCRUA used its best efforts to locate and acquire a property larger in size with flatter terrain in 2014. This site is the largest and flattest site available that LCRA would convey to BCRUA. This project is a raw water pump station, which has unique engineering and other features and requires close proximity to Lake Travis. On behalf of the cities of Cedar Park, Leander and Round Rock, the BCRUA is working diligently with the LCRA to provide the community with water. Similarly situated property with flatter terrain would not be subject to the same limitations imposed by Section 25-8-453(D)(1). 2. The variance: a) Is not necessitated by the scale, layout, construction method, or other design decision made by the applicant, unless the design decision provides greater overall environmental protection than is achievable without the variance; City of Austin | Environmental Commission Variance Application Guide 3 32 of 39B-04November 9, 2020 b) c) Yes / No the proposed regional public water supply use. The variance is necessitated by the operational requirements of Is the minimum deviation from the code requirement necessary to allow a reasonable use of the property; Yes / No Only six parking spaces and the minimum amount of fire lanes required by Travis County fire regulations are proposed. The size of the RWPS main building is necessitated by the operational requirements of the proposed regional public water supply use. Does not create a significant probability of harmful environmental consequences. Yes / No using permanent erosion control and soil retention blankets. All proposed slopes will be structurally contained or restored 3. Development with the variance will result in water quality that is at least equal to the water quality achievable without the variance. All rainfall runoff from the roof of the main RWPS building will Yes / No be harvested and pumped to the BCRUA water treatment plant. Structural water quality control (bio-filtration) is proposed for the site that complies with the City of Austin Environmental Criteria Manual. B. Additional Land Use Commission variance determinations for a requirement of Section 25-8-422 (Water Quality Transition Zone), Section 25-8-452 (Water Quality Transition Zone), Article 7, Division 1 (Critical Water Quality Zone Restrictions), or Section 25-8-368 (Restrictions on Development Impacting Lake Austin, Lady Bird Lake, and Lake Walter E. Long): 1. 2. 3. The criteria for granting a variance in Subsection (A) are met; Yes / No No variances for Part B are requested. The requirement for which a variance is requested prevents a reasonable, economic use of the entire property; Yes / No No variances for Part B are requested. The variance is the minimum deviation from the code requirement necessary to allow a reasonable, economic use of the entire property. Yes / No No variances for Part B are requested. **Variance approval requires all above affirmative findings. City of Austin | Environmental Commission Variance Application Guide 4 33 of 39B-04© 2020 Google © 2020 Google BCRUA RAW WATER PUMP STATION 9416 LIME CREEK ROAD ➤➤ N N 4000 ft 34 of 39B-041 2 3 4 5 6 7 8 9 10 11 12 13 14 E 15 S N W SIGN SIGN 792 791 PP 785 790 BOLLARD BOLLARD D=10°49'14" R=815.47' L=154.00' CHD=153.78' S 10° 25' 05" E SANDY CREEK PARK 12" CMP 785 BOLLARD 790 REFLECTOR POSTS SIGN LP 785 780 CONCRETE PAD WITH TABLE BBQ GRILL 765 760 775 770 755 CONCRETE PAD WITH TABLE 775 770 765 780 ' 1 1 . 4 9 1 E " 4 5 ' 1 0 ° 3 7 N 775 765 760 WATER QUALITY TRANSITION ZONE 760 750 755 770 775 780 770 765 760 755 745 18" CMP HOSE BIBB 725 PP GW 791 790 770 765 760 S 17°15'00" E 218.71' 785 780 PP 785 TJB PP PP GW XFMR XFMR 2" PW CONTACT CHAMBERS ( 2 ) 2 " P W 2" PW TOWER XFMR ELECTRICAL BUILDING C E L G E U UG ELEC 785 6" DR SIGN 4348 787.12 SFNF UG ELEC C E L G E U EHH 2 " H S UG ELEC UG ELEC 2" SFM EHH LP C E L G E U FH GRINDER PS ' 8 6 . 8 0 1 ' W " 4 0 1 0 ° 2 6 S 770 775 765 760 755 EHH ELECTRICAL BUILDING 7 8 0 1 8 " R C P CEDAR PARK WATER TREATMENT PLANT S 12°37'09" W 37.72' S 28°00'39" E 32.38' S 61°59'21" W 39.39' D S " 6 14" RW 775 ELEC MH 7 7 0 7 6 5 0 5 7 7 4 5 7 5 5 7 6 0 7 5 0 WATER QUALITY TRANSITION ZONE 18" RW 24" RW 4" DR NEUTRALIZATION TANK 4" DR 24" BWW 6" SD OVERFLOW DRAIN BOX EHH 24" FE 4527 775.10 SDFL 15IN STEELP 4511 779.64 WWMH UG ELEC 6" SD EMH 4368 776.72 EJB CONTROL G ELEC U 750 750 N 16°53'48" W 456.22' N 85°16'17" W 22.02' CRITICAL WATER QUALITY ZONE (ELEVATION 681 CONTOUR) Know what's below. Call before you dig. 9416 LIME CREEK ROAD SP-2020-0228D 1 2 3 4 5 6 7 8 9 10 12 13 14 15 6134 678.88 BIRP 1\2 WP 6133 670.38 BIRP 1\2 WP 11 0 15 30 60 GRAPHIC SCALE (FEET) REV. DESCRIPTION DATE JOINT VENTURE T.B.P.E. Registration No. 19893 RAW WATER PUMP STATION OVERALL EXISTING CONDITIONS 9-4-2020 DATE DAVID P. SMITH PM DESIGNED DRAFTED CHECKED ADA DPS TFG DPS PROJECT NO. 3-00670.01 DRAWING NO. CD-4 SHEET OF 35 5 M L K J I H G F E D C B A h t i m s d , M P 9 1 : 6 4 : 2 1 0 2 0 2 / 9 / 9 , N A L P E T I S T S I X E , G W D . E T I S - T S I X E - A O C - S P W R - C \ A U R C B \ : I 35 of 39B-041 2 3 4 5 6 7 8 9 10 11 12 13 14 15 E N W KEY NOTES S 1 2 4" WHITE EDGE STRIPE & RUMBLE STRIP PER TXDOT SPECIFICATIONS 6" RAISED CURB & GUTTER PER COA DETAIL 420S-1 CONCRETE TRAFFIC BARRIER (TxDOT CTB) SIGN SIGN CONCRETE TRAFFIC BARRIER (TxDOT CTB) 18" CMP LAND USE: SANDY CREEK PARK STRUCTURES WITHIN 50 FEET: NONE APPROXIMATE LOCATION OF EXIST. 2" WATER LINE 785 CONSTRUCTION LAYDOWN & STAGING AREA 792 791 LIME CREEK ROAD 60' R.O.W. PP PP GW LOWER COLORADO RIVER AUTHORITY CALLED 2,352.66 ACRES VOL. 1168, PG. 120, D.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 790 R 1 5' BOLLARD BOLLARD R 1 0 ' BOLLARD 12' R 2 0 ' ' 2 R 2 5' REFLECTOR POSTS TRANSFORMER YARD 81.41' 29.33' SWITCHGEAR BUILDING ' 7 6 . 0 3 20' 3.86' 780 ' 7 6 6 9 . 12" CMP ' . 9 3 4 ' SANDY CREEK PARK 9 3 8 5 RELOCATE 2" WATER LINE INSTALL 503 LF 2" SCH. 40 PVC CONNECT TO EXIST. 2" WL 785 . 12.00' PEC LIMITS FOR TRANSFORMER PAD 13.81' 780 LOWER COLORADO RIVER AUTHORITY CALLED 2,352.66 ACRES VOL. 1168, PG. 120, D.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 ' 1 1 . 4 9 1 E " 4 5 ' 1 0 ° 3 7 N CONCRETE PAD WITH TABLE 775 84" RW LINE & 10' TRANSMISSION TUNNEL 770 TEMPORARY CONSTRUCTION EASEMENT 765 775 765 770 PROPOSED DRAINAGE EASEMENT 760 WATER QUALITY TRANSITION ZONE 760 750 755 750 750 770 ' 3 3 . 9 765 760 755 100 LF 14' DIA TAIL TUNNEL 791 R3' R 2 5 ' SIGN 790 (3) FH PRV LP ' 5 7 . D=10°49'14" R=815.47' L=154.00' CHD=153.78' S 10° 25' 05" E PROPOSED DRAINAGE EASEMENT 9' 9' ' 8 1 12" FP-DI/MJ 785 20.46' 9' 9' 9' 9' 9' PIG LAUNCHING STATION 18" SD ' 5 7 . 5 2 R3' W B 4' ' 2 7 . HOLDING TANK 24" FP-DI/MJ 214' 33' 4.33' LIME CREEK ROAD 60' R.O.W. 790 R25' ' 2 RELOCATE 2" WATER LINE INSTALL 503 LF 2" SCH. 40 PVC S 17°15'00" E 218.71' ' 7 6 3 . 48.64' R4.5' ' 3 7 . 1 2 785 ' 8 3 . 7 1 0 . 2 2 ' 785 PP APPROXIMATE LOCATION OF ATO 24' ' 4 2 CHEMICAL STORAGE BUILDING 27.67' 7 CHEMICAL FEED BUILDING 6 ' . 4 1 1 8 " S D 4.1' 20' 780 36" RW-DI/MJ CEDAR PARK RW FLOW METER VAULT WATER QUALITY BASIN ' 8 6 . 8 0 1 ' W " 4 0 1 0 ° 2 6 S DETENTION BASIN 770 775 765 760 UNDERGROUND ELECTRICAL TJB PP PP XFMR 2" PW CONTACT CHAMBERS ( 2 ) 2 " P W 2" PW TOWER XFMR ELECTRICAL BUILDING C E L G E U UG ELEC 785 6" DR GW XFMR UG ELEC C E L G E U SIGN EHH 2 " H S UG ELEC UG ELEC 2" SFM U EHH 5. FH LP GRINDER PS RELOCATE 2" WATER LINE INSTALL 503 LF 2" SCH. 40 PVC CONNECT TO EXIST. 2" WL 7 8 0 EHH ELECTRICAL BUILDING 3 6 " R W - D I / M J 1 8 " R C P S 12°37'09" W 37.72' LOWER COLORADO RIVER AUTHORITY CALLED 2,352.66 ACRES VOL. 1168, PG. 120, D.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 CEDAR PARK WATER TREATMENT PLANT S 28°00'39" E 32.38' LAND USE: WATER TREATMENT & UTILITIES RAW WATER PUMP STATION 775 BRUSHY CREEK REGIONAL UTILITY AUTHORITY, INC. 1.685 ACRES DOC. 2014062484, O.P.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 770 ' 8 765 760 100 LF 14' DIA TUNNEL 755 75' ELECTRICAL POLE 7 7 0 7 6 5 775 3 6 " R W - D I/ M J S 61°59'21" W 39.39' D S " 6 14" RW 7 5 5 7 6 0 RISER POLE 7 5 0 ELEC MH N 85°16'17" W 22.02' WATER QUALITY TRANSITION ZONE PROPERTY LINE 18" RW 24" RW 4" DR 24" BWW 6" SD 36" RW-DI/MJ 7' 3.9 OVERFLOW DRAIN BOX EHH 2' 5.4 2' 2.9 NEUTRALIZATION TANK 4" DR 24" FE UG ELEC 6" SD EMH 24" BWW 2 4" R W EMH C E L G E U G ELEC 24" RW U PROPOSED DRAINAGE EASEMENT 0 5 7 7 4 5 745 N 16°53'48" W 456.22' LOWER COLORADO RIVER AUTHORITY CALLED 2,352.66 ACRES VOL. 1168, PG. 120, D.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 LAND USE: SANDY CREEK PARK STRUCTURES WITHIN 50 FEET: NONE SITE PLAN RELEASE NOTES 1. 2. 3. 4. 8 UG ELEC ALL IMPROVEMENTS SHALL BE MADE IN ACCORDANCE WITH THE RELEASED SITE PLAN. ANY ADDITIONAL U G T E L E IMPROVEMENTS WILL REQUIRE SITE PLAN AMENDMENT AND APPROVAL OF THE DEVELOPMENT " H S SERVICES DEPARTMENT. 1 APPROVAL OF THIS SITE PLAN DOES NOT INCLUDE BUILDING AND FIRE CODE APPROVAL NOR BUILDING R W PERMIT APPROVAL. UG TELE ADDITIONAL ELECTRIC EASEMENTS MAY BE REQUIRED 2 " H S AT A LATER DATE. CAMERA TOWER FOR DRIVEWAY CONSTRUCTION: THE OWNER IS E C RESPONSIBLE FOR ALL COSTS FOR RELOCATION OF, OR L U G E G E DAMAGE TO UTILITIES. 1 6 " B W W R W ( A B A N D O N E D ) 2 0 " 7 8 5 L E C 6 " FOR CONSTRUCTION WITHIN THE RIGHT-OF-WAY, A ROW EXCAVATION PERMIT IS REQUIRED. PP FLUORIDE STORAGE TANK #1 2 2 4 H S EHH " S F M 8 " U G ELEC A L PIPI N G U G E " R W L E C M IC CHEM PIPING EHH H E (3) C " 2 / 1 - 2 C A P CHEM PIPING 8 " B W W U G ELEC EHH CEDAR PARK WATER TREATMENT PLANT ALUM STORAGE TANK #1 BULK CHEMICAL STORAGE FACILITY ALUM STORAGE TANK #2 RAW WATER STANDPIPE 3 " D R 12" 8 " B W R C E L G E U BUILDING 2" SFM 4" W R W 2 4 " 2 4 " E F 2 4 " B W W UG ELEC 8" BWR CAMERA TOWER 2 " S F M FH R " D 6 6 " D R 16" RW EHH XFMR XFMR W R " 4 2 2-1/2" PAC 2 " S F M 24" RW 16" RW (ABANDONED) 96"-120" ID RW INTAKE TUNNEL LAND USE: SANDY CREEK PARK STRUCTURES WITHIN 50 FEET: NONE ELECTRICAL IMPROVEMENTS BY OTHERS (TYP) LEGEND 0 15 30 60 GRAPHIC SCALE (FEET) HOSE BIBB 780 CONCRETE PAD WITH TABLE BBQ GRILL 765 760 775 770 755 725 CRITICAL WATER QUALITY ZONE (ELEVATION 681 CONTOUR) Know what's below. Call before you dig. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 IRON ROD FOUND MONUMENT FOUND LIGHT POLE POWER POLE GUY WIRE TREE EX. EDGE OF PAVEMENT PROPERTY LINE EX. FENCE EX. U.G. ELECTRIC LINE EX. AERIAL ELECTRIC LINE EX. WATER LINE EX. STORM DRAIN REV. DESCRIPTION DATE JOINT VENTURE T.B.P.E. Registration No. 19893 790 EX. CONTOUR LINE RAW WATER PUMP STATION LIMITS OF CONSTRUCTION DIMENSIONED SITE PLAN 9-15-2020 DATE EX. CONCRETE EX. GRAVEL EX. BUILDING PROP. PRECAST CONC. FENCE PROP. RAISED CURB & GUTTER PROP. CONC. WALL DAVID P. SMITH PM DESIGNED DRAFTED CHECKED ADA DPS TFG DPS PROJECT NO. 3-00670.01 DRAWING NO. CD-10 SHEET OF 35 11 9416 LIME CREEK ROAD SP-2020-0228D M L K J I H G F E D C B A h t i m s d , M A 6 1 : 9 3 : 9 0 2 0 2 / 6 1 / 9 , N A L P E T I S D E N O I S N E M I D 0 1 - D C , G W D . E T I S M I D - A O C - S P W R - C \ A U R C B \ : I 36 of 39B-041 2 3 4 5 6 7 8 9 10 11 12 13 14 E 15 S N W LEGEND PP 790 BOLLARD BOLLARD BOLLARD 12.00' TRANSFORMER YARD 791 REFLECTOR POSTS 7 9 0 790 7 9 1 (3) FH PRV LP 790 SIGN D=10°49'14" R=815.47' L=154.00' CHD=153.78' S 10° 25' 05" E 791 PROPOSED DRAINAGE EASEMENT 12" FP-DI/MJ 785 789 SWITCHGEAR BUILDING FF = 789.50 7 8 9 780 ELECTRICAL ROOM ELEV = 791.00 100 LF 14' DIA TAIL TUNNEL 791 PP GW LIME CREEK ROAD 60' R.O.W. 790 0 9 7 PIG LAUNCHING STATION W B HOLDING TANK 24" FP-DI/MJ 790 18" SD 790 790 12" CMP SANDY CREEK PARK 785 PEC LIMITS FOR TRANSFORMER PAD 780 ' 1 1 . 4 9 1 E " 4 5 ' 1 0 ° 3 7 N CONCRETE PAD WITH 84" RW LINE & 10' TRANSMISSION TUNNEL 55 SF ~ 12" DRY ROCK RIPRAP 24" THICK 775 788 F 765 TEMPORARY CONSTRUCTION EASEMENT 25 SF ~ 6" DRY ROCK RIPRAP 12" THICK 770 PROPOSED DRAINAGE EASEMENT 765 WATER QUALITY TRANSITION ZONE 760 755 750 750 775 770 765 760 755 N 16°53'48" W 456.22' 745 MEZZANINE ELEV = 790.50 RAW WATER PUMP STATION PUMP FLOOR ELEV = 770.50 770 765 760 100 LF 14' DIA TUNNEL S 17°15'00" E 218.71' 7 8 9 9 8 7 7 8 8 7 8 8 8 7 7 785 7 6 8 7 8 5 7 8 7 7 8 6 7 8 5 1 8 " S D 7 8 4 7 8 3 7 8 2 DETENTION BASIN 772773774 771 770 CHEMICAL FEED BUILDING FFE = 785.75 780 36" RW-DI/MJ CHEMICAL STORAGE BUILDING FFE = 784.75 784 ' 8 6 . 8 0 1 ' W " 4 0 1 0 ° 2 6 S 7 8 3 2 8 7 7 8 1 CEDAR PARK RW FLOW METER VAULT WATER QUALITY BASIN 776 777 7 7 5 775 770 765 760 UNDERGROUND ELECTRICAL APPROXIMATE LOCATION OF ATO PP 785 TJB PP PP GW XFMR XFMR 2" PW CONTACT CHAMBERS ( 2 ) 2 " P W 2" PW TOWER XFMR ELECTRICAL BUILDING C E L G E U UG ELEC 785 6" DR 7 8 0 3 6 " R W - D I / M J 1 8 " R C P EHH ELECTRICAL BUILDING S 12°37'09" W 37.72' S 28°00'39" E 32.38' CEDAR PARK WATER TREATMENT PLANT 6.2 7 L = 7 L - F E E T 4" S 2 755 75' ELECTRICAL POLE 7 7 0 7 6 5 7 5 5 7 6 0 RISER POLE 7 5 0 WATER QUALITY TRANSITION ZONE PROPERTY LINE 775 3 6 " R 4384 774.20 TRL E W - D I/ M J ELEC MH 4381 770.34 TRL S 61°59'21" W 39.39' 14" RW 40063 778.88 WL PIPE RISER 40064 778.85 WL E PIPE RISER 40068 686.38 BC E BE 40067 686.45 BC 40002 40060 776.91 776.91 SATRV 60 SATRV 60 60 776.91 TRAV 1/2 WP D S " 6 4475 774.55 WL CO 6IN PVC 4387 683.26 FNC LINK 9 N 85°16'17" W 22.02' 4376 770.01 TRL 4379 766.42 TRL 18" RW 24" BWW 6" SD 7' 3.9 36" RW-DI/MJ 4375 682.96 FNC LINK 9 2' 5.4 0 10 20 40 GRAPHIC SCALE (FEET) OVERFLOW DRAIN BOX REV. DESCRIPTION DATE JOINT VENTURE T.B.P.E. Registration No. 19893 PROPOSED DRAINAGE EASEMENT 0 5 7 7 4 5 96"-120" ID RW INTAKE TUNNEL ELECTRICAL IMPROVEMENTS BY OTHERS (TYP) RAW WATER PUMP STATION FILL EXHIBIT 9-4-2020 DATE DAVID P. SMITH PM DESIGNED DRAFTED CHECKED ADA DPS TFG DPS PROJECT NO. 3-00670.01 DRAWING NO. FILL-1 SHEET OF 35 9416 LIME CREEK ROAD SP-2020-0228D Know what's below. Call before you dig. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 M L K J I H G E D C B A h t i m s d , M P 7 2 : 2 2 : 1 0 2 0 2 / 9 / 9 , T I B I H X E L L I F , G W D . T I B I H X E L L I F - A O C - S P W R - C \ A U R C B \ : I 37 of 39B-041 2 3 4 5 6 7 8 9 10 11 12 13 14 15 100 LF 14' DIA TAIL TUNNEL 791 LIME CREEK ROAD 60' R.O.W. APPROXIMATE LOCATION OF ATO 790 G G G 12.00' G G G G TRANSFORMER YARD G G G G G G D=10°49'14" R=815.47' L=154.00' CHD=153.78' S 10° 25' 05" E PROPOSED DRAINAGE EASEMENT 790 790 (3) FH PRV PIG LAUNCHING STATION 12" FP-DI/MJ 785 S-2 P 785 HOLDING TANK 24" FP-DI/MJ 785 PEC LIMITS FOR TRANSFORMER PAD ' 1 1 . 4 9 1 E " 4 5 ' 1 0 ° 3 7 N 780 SWITCHGEAR BUILDING G G G 780 L L E R W O NIT B-8 O M L 780 G 770 84" RW LINE & 10' TRANSMISSION TUNNEL TEMPORARY CONSTRUCTION EASEMENT 765 775 765 770 PROPOSED DRAINAGE EASEMENT 760 WATER QUALITY TRANSITION ZONE 760 755 775 775 770 770 765 765 760 760 755 755 745 745 750 750 750 N 16°53'48" W 456.22' 790 18" SD 3606 3607 EPP WOOD OHEW3 E 3602 3603 EPP WOOD OHEW2 E 3598 3599 EPP WOOD OHEW1 E 3595 OHEW E W B S-3 P RAW WATER PUMP STATION 770 J 765 760 100 LF 14' DIA TUNNEL N E S W 0 10 20 40 GRAPHIC SCALE (FEET) 785 S 17°15'00" E 218.71' 785 785 S-1 P CHEMICAL FEED BUILDING CHEMICAL STORAGE BUILDING 1 8 " S D 780 36" RW-DI/MJ CEDAR PARK RW FLOW METER VAULT WATER QUALITY BASIN ' 8 6 . 8 0 1 ' W " 4 0 1 0 ° 2 6 S 7 8 0 3 6 " R W - D I / M J DETENTION BASIN 770 775 765 760 UNDERGROUND ELECTRICAL 755 S 12°37'09" W 37.72' S 28°00'39" E 32.38' 775 3 6 " R W - D I/ M J S 61°59'21" W 39.39' 40060 40002 776.91 776.91 SATRV 60 SATRV 60 75' ELECTRICAL POLE 7 7 0 7 6 5 7 5 5 7 6 0 RISER POLE 7 5 0 4382 772.55 EMH WATER QUALITY TRANSITION ZONE PROPERTY LINE PROPOSED DRAINAGE EASEMENT 0 5 7 7 4 5 96"-120" ID RW INTAKE TUNNEL N 85°16'17" W 22.02' 7' 3.9 REV. DESCRIPTION DATE ELECTRICAL IMPROVEMENTS BY OTHERS (TYP) JOINT VENTURE T.B.P.E. Registration No. 19893 RAW WATER PUMP STATION SLOPE MAP 9-4-2020 DATE DAVID P. SMITH PM DESIGNED DRAFTED CHECKED ADA DPS TFG DPS PROJECT NO. 3-00670.01 DRAWING NO. CD-5 SHEET OF 35 6 9416 LIME CREEK ROAD SP-2020-0228D 792 791 M L K J I H F E D C B A h t i m s d , M P 1 2 : 8 3 : 3 0 2 0 2 / 2 / 8 , L E D O M , G W D . 6 3 X 4 2 - A O C - T E E H S - G X \ A U R C B \ : I Know what's below. Call before you dig. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 38 of 39B-041 2 3 4 5 6 7 8 9 10 11 12 13 14 LIME CREEK ROAD 60' R.O.W. PP LOWER COLORADO RIVER AUTHORITY CALLED 2,352.66 ACRES VOL. 1168, PG. 120, D.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 790 BOLLARD BOLLARD D=10°49'14" R=815.47' L=154.00' CHD=153.78' S 10° 25' 05" E BOLLARD 790 REFLECTOR POSTS SIGN LP 785 PP GW 791 790 775 765 770 780 770 765 760 755 775 BRUSHY CREEK REGIONAL UTILITY AUTHORITY, INC. 1.685 ACRES DOC. 2014062484, O.P.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 770 765 760 750 750 745 N 16°53'48" W 456.22' LOWER COLORADO RIVER AUTHORITY CALLED 2,352.66 ACRES VOL. 1168, PG. 120, D.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 S 17°15'00" E 218.71' 785 780 PP 785 TJB PP PP GW XFMR XFMR 2" PW CONTACT CHAMBERS ( 2 ) 2 " P W 2" PW TOWER XFMR ELECTRICAL BUILDING C E L G E U UG ELEC 785 6" DR 785 ' 8 6 . 8 0 1 ' W " 4 0 1 0 ° 2 6 S 7 7 0 7 6 5 770 775 765 760 755 0 5 7 7 4 5 7 5 5 7 6 0 7 5 0 WATER QUALITY TRANSITION ZONE 7 8 0 1 8 " R C P EHH ELECTRICAL BUILDING LOWER COLORADO RIVER AUTHORITY CALLED 2,352.66 ACRES VOL. 1168, PG. 120, D.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 CEDAR PARK WATER TREATMENT PLANT S 12°37'09" W 37.72' S 28°00'39" E 32.38' 775 ELEC MH S 61°59'21" W 39.39' D S " 6 14" RW 18" RW 24" BWW 6" SD N 85°16'17" W 22.02' 15 E N S W LEGEND RETAINED IN NATURAL STATE 11,821 S.F. RESTORED TO NATURAL STATE 16,685 S.F. LIMITS OF CONSTRUCTION TOTAL AREA RETAINED IN OR RESTORED TO NATURAL STATE = 28,506 S.F. UPLANDS AREA OF SITE = 69,086 S.F. REQUIRED AREA TO BE RETAINED OR RESTORED TO NATURAL STATE = 0.40 x 69,086 S.F. = 27,634 S.F. 0 10 20 40 GRAPHIC SCALE (FEET) OVERFLOW DRAIN BOX REV. DESCRIPTION DATE JOINT VENTURE T.B.P.E. Registration No. 19893 RAW WATER PUMP STATION RESTORATION EXHIBIT 9-29-2020 DATE DAVID P. SMITH PM DESIGNED DRAFTED CHECKED ADA DPS TFG DPS PROJECT NO. 3-00670.01 DRAWING NO. EX 1 SHEET OF 35 -- SANDY CREEK PARK 12" CMP 785 780 LOWER COLORADO RIVER AUTHORITY CALLED 2,352.66 ACRES VOL. 1168, PG. 120, D.R.T.C.T. EAST TEXAS RAILROAD COMPANY SURVEY NO. 54 CONCRETE PAD WITH ' 1 1 . 4 9 1 E " 4 5 ' 1 0 ° 3 7 N F 765 WATER QUALITY TRANSITION ZONE 760 755 M L K J I H G E D C B A h t i m s d , M A 2 0 : 6 5 : 9 0 2 0 2 / 9 2 / 9 , T I B I H X E N O I T A R O T S E R , . G W D N O I T A R O T S E R \ A U R C B \ : I Know what's below. Call before you dig. 9416 LIME CREEK ROAD SP-2020-0228D 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 39 of 39B-04