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CM-10-04-100PBS1 An employee-owned company April 23, 2010 Heather Beatty, P.G. Edwards Aquifer Protection Program 2800 South IH 35 Austin, Texas 78704 Re: Exception Request for Evaluation of a Geologic Assessment for Proposed Creek Bend Boulevard Extension, Williamson County, Texas Dear Heather: PBS&J is submitting this exception request on behalf of the City of Round Rock. The City of Round Rock is requesting the Edwards Aquifer Protection Program (EAPP) of the Texas Commission on Environmental Quality (TCEQ) to evaluate the geologic assessment and the findings prepared by PBS&J in advance of completion of the Water Pollution Abatement Plan (WAPP). This exception is being requested in order to provide EAPP an opportunity to review the findings of the geologic assessment and to seek concurrence on the findings. The concurrence, if granted, will be provided to the City of Round Rock in the form of a letter of acceptance from the EAPP for the project to proceed in its current alignment. The Creek Bend Boulevard extension project proposes to extend the existing Creek Bend Boulevard from Creek Bend Circle to Wyoming Springs Drive. The project also includes possible modifications to and realignment of Hairy Man Road (Brushy Creek Road). The project has completed an alternatives analysis of three separate alignments (see attached figure). The alternatives analysis resulted in the selection of the preferred alternative which resulted in a negligible impact to environmental and economic constraints. One alternative alignment impacted the landowner's residence, while the other alternative alignment impacted a cave which functions as a sensitive recharge feature. The preferred alignment does not impact either of these identified constraints. The environmental study area of this roadway extension is defined as 500 feet on either side of the centerline of the right-of-way (ROW). The landowner provided a limited right of access to this environmental study area on two separate occasions. During the first right of entry, PBS&J conducted a Phase I karst survey and a Phase II karst investigation within this defined study area. The Phase I survey revealed 16 karst features. The Phase II investigation of site karst features was conducted on June 20-22, 2007. The objectives of the investigation were to define the subsurface development of each feature and to determine the potential environmental significance of each of the 16 features identified during the Phase I survey. bw-ku-o4-10065044Bridge Point Parkway • Suite 200 • Austin, Texas 78730 • Telephone: 512.327.6840 • Fax: 512.327.2453 • www.pbsj.com Ms. Heather Beatty, P.G. April 23, 2010 Page 2 The results of the Phase II investigation indicate that of the 16 geologic features found within the project area, one feature (identified as F-8 "Creek Bend Cave") meets the criteria to be classified as "sensitive" in terms of aquifer point recharge. The remaining karst features do not meet the criteria and therefore are not classified as sensitive to recharge. Appropriate best management practices and stormwater runoff design will be used to protect Creek Bend Cave. Surface water discharge from the roadway will be contained and prevented from entering Creek Bend Cave which is located on adjoining and restricted property. Three of the fifteen remaining features (F -3G, F -3H, and F-31) are located within the proposed right of way and will require appropriate closure. This closure requires the excavation of each feature to bring the ground surface to proposed grade. The remaining 12 features will not be disturbed by the project and may remain in their current condition. Appropriate best management practices adjacent to these features will be maintained during construction activities. A second right of entry was obtained in March 2010 by the City of Round Rock from the landowner. This right of entry permitted access for EAPP staff to personally inspect each karst feature to evaluate sensitivity. The site visit also gave EAPP staff the opportunity to see the alignment of the proposed roadway relative to the location of each of the karst features. This site visit provided a critical step in the process to request TCEQ concurrence with the findings of our extensive karst investigations. In conclusion, the City of Round Rock is asking the EAPP to review the enclosed geologic assessment and with your newly acquired perspective of the nature and condition of the karst features provide a concurrence of the results so that the project may proceed to meet the purpose and need of the Round Rock community. On behalf of the City of Round Rock, PBS&J wishes to thank the EAPP for the opportunity to review this documentation in advance of the WPAP completion. Please contact me at 342- 3400 if you have any questions concerning our findings or our request for concurrence. Sincerely, Steve McVey, P.G. Attachment xc: David Bartels, City of Round Rock Recharge and Transition Zone Exception Request Form Checklist ✓ General Information Form (TCEQ-0587) ATTACHMENT A - Road Map ATTACHMENT B - USGS / Edwards Recharge Zone Map ATTACHMENT C - Project Description ✓ Geologic Assessment Form (TCEQ-0585), if necessary ATTACHMENT A - Geologic Assessment Table (TCEQ-0585-Table) Comments to the Geologic Assessment Table ATTACHMENT B - Soil Profile and Narrative of Soil Units ATTACHMENT C - Stratigraphic Column ATTACHMENT D - Narrative of Site Specific Geology Site Geologic Map(s) Table or list for the position of features' latitude/longitude (if mapped using GPS) Recharge and Transition Zone Exception Request Form (TCEQ-0628) ATTACHMENT A - Nature of Exception ATTACHMENT B - Documentation of Equivalent Water Quality Protection Temporary Stormwater Section (TCEQ-0602), if necessary ATTACHMENT A - Spill Response Actions ATTACHMENT B - Potential Sources of Contamination ATTACHMENT C - Sequence of Major Activities ATTACHMENT D - Temporary Best Management Practices and Measures ATTACHMENT E - Request to Temporarily Seal a Feature (if sealing a feature) ATTACHMENT F - Structural Practices ATTACHMENT G - Drainage Area Map ATTACHMENT H - Temporary Sediment Pond(s) Plans and Calculations ATTACHMENT I - Inspection and Maintenance for BMPs ATTACHMENT J - Schedule of Interim and Permanent Soil Stabilization Practices Permanent Stormwater Section (TCEQ-0600), if necessary ATTACHMENT A - 20% or Less Impervious Cover Waiver, if project is multi -family residential, a school, or a small business and 20% or less impervious cover is proposed for the site ATTACHMENT B - BMPs for Upgradient Stormwater ATTACHMENT C - BMPs for On-site Stormwater ATTACHMENT D - BMPs for Surface Streams ATTACHMENT E - Request to Seal Features, if sealing a feature ATTACHMENT F - Construction Plans ATTACHMENT G - Inspection, Maintenance, Repair and Retrofit Plan ATTACHMENT H -Pilot-Scale Field Testing Plan, if BMPs not based on Complying with the Edwards Aquifer Rules: Technical Guidance for BMPs ATTACHMENT I -Measures for Minimizing Surface Stream Contamination Agent Authorization Form (TCEQ-0599), if application submitted by agent Application Fee Form (TCEQ-0574) Check Payable to the "Texas Commission on Environmental Quality" ✓ Core Data(TCEQ-10400) Form (TCEQ 10400) TCEQ-0588 (Rev. 03/02/09) Page 8 of 13 General Information Form For Regulated Activities on the Edwards Aquifer Recharge and Transition Zones and Relating to 30 TAC §213.4(b) & §213.5(b)(2)(A), (B) Effective June 1, 1999 REGULATED ENTITY NAME: Creek Bend Boulevard Extension Project COUNTY: Williamson STREAM BASIN: Brush Creek EDWARDS AQUIFER: X RECHARGE ZONE _ TRANSITION ZONE PLAN TYPE: X WPAP _ AST _ EXCEPTION SCS _ UST _ MODIFICATION CUSTOMER INFORMATION 1. Customer (Applicant): Contact Person: David Bartels Entity: City of Round Rock, Public Works Operations Mailing Address: 2008 Enterprise Drive City, State: Round Rock, Texas Zip: 78664 Telephone: 512.218.5555 FAX: 512.218.5563 Agent/Representative (If any): Contact Person: Steve McVey, PG Entity: PBS&J Mailing Address: 6504 Bridge Point Parkway, Suite 200 City, State: Austin, Texas Zip: 78730 Telephone: 512.342.3400 FAX: 512.327.2453 2. X This project is inside the city limits of Round Rock, Texas This project is outside the city limits but inside the ETJ (extra -territorial jurisdiction) of This project is not located within any city's limits or ETJ. 3. The location of the project site is described below. The description provides sufficient detail and clarity so that the TCEQ's Regional staff can easily locate the project and site boundaries for a field investigation. From Creek Bend Circle to Wyoming Springs Drive, an undeveloped tract located between these roads for an extension of Creek Bend Boulevard; Round Rock, Williamson County, Texas. 4. X ATTACHMENT A - ROAD MAP. A road map showing directions to and the location of the project site is attached at the end of this form. TCEQ-0587 (Rev. 10/01/2004) Page 1 of 3 5. X ATTACHMENT B - USGS / EDWARDS RECHARGE ZONE MAP. A copy of the official 7.5 -minute USGS Quadrangle Map (Scale: 1" = 2000') of the Edwards Recharge Zone is attached behind this sheet. The map(s) should clearly show: X Project site. X USGS Quadrangle Name(s). X Boundaries of the Recharge Zone (and Transition Zone, if applicable). X Drainage path from the project to the boundary of the Recharge Zone. 6. X Sufficient survey staking is provided on the project to allow TCEQ regional staff to locate the boundaries and alignment of the regulated activities and the geologic or manmade features noted in the Geologic Assessment. The TCEQ must be able to inspect the project site or the application will be returned. 7. X ATTACHMENT C - PROJECT DESCRIPTION. Attached at the end of this form is a detailed narrative description of the proposed project. 8. Existing project site conditions are noted below: Existing commercial site Existing industrial site Existing residential site Existing paved and/or unpaved roads _ Undeveloped (Cleared) X Undeveloped (Undisturbed/Uncleared) Other: PROHIBITED ACTIVITIES 9. X I am aware that the following activities are prohibited on the Recharge Zone and are not proposed for this project: (1) waste disposal wells regulated under 30 TAC Chapter 331 of this title (relating to Underground Injection Control); (2) new feedlot/concentrated animal feeding operations, as defined in 30 TAC §213.3; (3) land disposal of Class I wastes, as defined in 30 TAC §335.1; (4) the use of sewage holding tanks as parts of organized collection systems; and (5) new municipal solid waste landfill facilities required to meet and comply with Type I standards which are defined in §330.41(b), (c), and (d) of this title (relating to Types of Municipal Solid Waste Facilities). 10. X I am aware that the following activities are prohibited on the Transition Zone and are not proposed for this project: (1) waste disposal wells regulated under 30 TAC Chapter 331 (relating to Underground Injection Control); (2) land disposal of Class I wastes, as defined in 30 TAC §335.1; and (3) new municipal solid waste landfill facilities required to meet and comply with Type I standards which are defined in §330.41 (b), (c), and (d) of this title. TCEQ-0587 (Rev. 10/01/2004) Page 2 of 3 ADMINISTRATIVE INFORMATION 11. The fee for the plan(s) is based on: X For a Water Pollution Abatement Plan and Modifications, the total acreage of the site where regulated activities will occur. For an Organized Sewage Collection System Plans and Modifications, the total linear footage of all collection system lines. For a UST Facility Plan or an AST Facility Plan, the total number of tanks or piping systems. A Contributing Zone Plan. A request for an exception to any substantive portion of the regulations related to the protection of water quality. A request for an extension to a previously approved plan. 12. Application fees are due and payable at the time the application is filed. If the correct fee is not submitted, the TCEQ is not required to consider the application until the correct fee is submitted. Both the fee and the Edwards Aquifer Fee Form have been sent to the Commission's: _ TCEQ cashier X Austin Regional Office (for projects in Hays, Travis, and Williamson Counties) San Antonio Regional Office (for projects in Bexar, Comal, Kinney, Medina, and Uvalde Counties) 13. X Submit one (1) original and three (3) copies of the completed application to the appropriate regional office for distribution by the TCEQ to the local municipality or county, groundwater conservation districts, and the TCEQ's Central Office. 14. X No person shall commence any regulated activity until the Edwards Aquifer Protection Plan(s) for the activity has been filed with and approved by the executive director. X No person shall commence any regulated activity until the Contributing Zone Plan for the activity has been filed with the executive director. To the best of my knowledge, the responses to this form accurately reflect all information requested concerning the proposed regulated activities and methods to protect the Edwards Aquifer. This GENERAL INFORMATION FORM is hereby submitted for TCEQ review. The application was prepared by: Steve McVey, PG, PBS&J Print Name of Customer/Agent Signature of Customer/Agent Date If you have questions on how to fill out this form or about the Edwards Aquifer protection program, please contact us at 210/490- 3096 for projects located in the San Antonio Region or 512/339-2929 for projects located in the Austin Region. Individuals are entitled to request and review their personal information that the agency gathers on its forms. They may also have any errors in their information corrected. To review such information, contact us at 512/239-3282. TCEQ-0587 (Rev. 10/01/2004) Page 3 of 3 Attachment A Road Map Creek Bend Boulevard Extension Project Location Map Creek Bend Cir. to Wyoming Springs Dr. (0.44 miles) Round Rock, Williamson County, Texas CSJ: 0914-05-150 Source(s): CORR GAS Scale:1 inch equals 2,000 feet Date: 14 Juane 2007 0 2.000 4.000 i eel State Plane, Texas Central, NAD83, Feet Attachment B USGS/Edwards Recharge Zone Map Sewage Disposal 0 FLOW DIRECTION north 2000 4000 feet Base Map: USGS 7.5' Quadrangle; Round Rock, Texas PBS, • Engineering • Environmental Consulting • Surveying EDWARDS AQUIFER RECHARGE ZONE MAP CREEK BEND BOULEVARD EXTENSION WILLIAMSON COUNTY, TEXAS File: I:\projects\hcl\city of round rock\creek bend\441200.01\cad\recharge_fig.ai Attachment C Project Description The City of Round Rock is requesting that the Edwards Aquifer Protection Program (EAPP) of the Texas Commission on Environmental Quality (TCEQ) evaluate the geologic assessment and the findings prepared by PBS&J in advance of completion of the Water Pollution Abatement Plan. This exception is being requested in order to allow EAPP to review the findings of the geologic assessment and to seek concurrence on the conclusions and recommendations prepared by PBS&J. The concurrence, if granted, will come to the City of Round Rock in the form of a letter of acceptance from the EAPP for the project to proceed in its current alignment. The City of Round Rock in cooperation with the Texas Department of Transportation (TxDOT) proposes to extend the existing Creek Bend Boulevard from Creek Bend Circle to Wyoming Springs Drive (CSJ 0914-05-150). The project corridor (defined as the Creek Bend Boulevard extension) is approximately 0.44 mile in length and is located in Williamson County in central Texas (see Attachment A). The proposed new location roadway would consist of extending the existing four -lane divided arterial with a bridge over Brushy Creek. Creek Bend Boulevard would connect to Brightwater Boulevard, which has an identical section, a four -lane divided roadway with a raised median. The project also includes possible modifications to and realignment of Hairy Man Road/Brushy Creek Road (hereafter referred to as Hairy Man Road). The proposed Hairy Man Road realignment would run approximately 970 feet northwest from the proposed Creek Bend Boulevard extension and would transition into the existing Hairy Man Road. The existing Hairy Man Road bridge is to be removed and a section of Hairy Man Road permanently closed to vehicular traffic via a cul-de-sac at the proposed terminus. The proposed project is included in the Capital Area Metropolitan Planning Organization (CAMPO) 2008-2011 Transportation Improvement Program (TIP) (CAMPO, 2006 [adopted February 12, 2007]). The funding category is 7 — Surface Transportation Program (STP) Metropolitan Mobility, which consists of transportation projects intended to improve mobility. Traffic projections for the proposed Creek Bend Boulevard extension were obtained from the CAMPO Model Estimate: Model Version 2006-2030 Amended Plan. The traffic volumes along this roadway indicates the average daily traffic (ADT) for the base year 2007 as being 25,000 vehicles per day (VPD) and 2030 traffic is projected to be approximately 40,000 VPD. Geologic Assessment For Regulated Activities on The Edwards Aquifer Recharge/transition Zones and Relating to 30 TAC §213.5(b)(3), Effective June 1, 1999 REGULATED ENTITY NAME: Creek Bend Boulevard Extension Project, Williamson County, Texas TYPE OF PROJECT: X WPAP AST SCS UST LOCATION OF PROJECT: X Recharge Zone PROJECT INFORMATION Transition Zone Contributing Zone within the Transition Zone 1. X Geologic or manmade features are described and evaluated using the attached GEOLOGIC ASSESSMENT TABLE. 2. Soil cover on the project site is summarized in the table below and uses the SCS Hydrologic Soil Groups* (Urban Hydrology for Small Watersheds, Technical Release No. 55, Appendix A, Soil Conservation Service, 1986). If there is more than one soil type on the project site, show each soil type on the site Geologic Map or a separate soils map. Soil Units, Infiltration Characteristics & Thickness Soil Name Group* Thickness (feet) Eckrant cobbly clay D 0.5 Eckrant extremely stony clay D 0.5 Eckrant rock outcrop complex N/A 0.5 Georgetown stony clay loam C 1 Oakalla B 2 * Soil Group Definitions (Abbreviated) A. Soils having a high infiltration rate when thoroughly wetted. B. Soils having a moderate infiltration rate when thoroughly wetted. C. Soils having a slow infiltration rate when thoroughly wetted. D. Soils having a very slow infiltration rate when thoroughly wetted. 3. X A STRATIGRAPHIC COLUMN is attached at the end of this form that shows formations, members, and thicknesses. The outcropping unit should be at the top of the stratigraphic column. 4. X A NARRATIVE DESCRIPTION OF SITE SPECIFIC GEOLOGY is attached at the end of this form. The description must include a discussion of the potential for fluid movement to the Edwards Aquifer, stratigraphy, structure, and karst characteristics of the site. 5. X Appropriate SITE GEOLOGIC MAP(S) are attached: The Site Geologic Map must be the same scale as the applicant's Site Plan. The minimum scale is 1" : 400' Applicant's Site Plan Scale Site Geologic Map Scale Site Soils Map Scale (if more than 1 soil type) 1" = 250' 1" = 250' 1"= 400' TCEQ-0585 (Rev. 10-01-04) Page 1 of 2 X Global Positioning System (GPS) technology. Other method(s). 7. X The project site is shown and labeled on the Site Geologic Map. 8. X Surface geologic units are shown and labeled on the Site Geologic Map. 9. X Geologic or manmade features were discovered on the project site during the field investigation. They are shown and labeled on the Site Geologic Map and are described in the attached Geologic Assessment Table. Geologic or manmade features were not discovered on the project site during the field investigation. 10. The Recharge Zone boundary is shown and labeled, if appropriate. 11. All known wells (test holes, water, oil, unplugged, capped and/or abandoned, etc.): There are (#) wells present on the project site and the locations are shown and labeled. (Check all of the following that apply.) - The wells are not in use and have been properly abandoned. The wells are not in use and will be properly abandoned. _ The wells are in use and comply with 16 TAC Chapter 76. X There are no wells or test holes of any kind known to exist on the project site. ADMINISTRATIVE INFORMATION 12. X One (1) original and three (3) copies of the completed assessment has been provided. Date(s) Geologic Assessment was performed: April 2010 Date To the best of my knowledge, the responses to this form accurately reflect all information requested concerning the proposed regulated activities and methods to protect the Edwards Aquifer. My signature certifies that I am qualified as a geologist as defined by 30 TAC Chapter 213. James P. Killian Print Name of Geologist gnature of Geologist Representing: PBS&J 512/342-3359 Telephone 512/327-2453 Fax 3 17 ate (Name of Company) If you have questions on how to fill out this form or about the Edwards Aquifer protection program, please projects located in the San Antonio Region or 512/339-2929 for projects located in the Austin Region. Individuals are entitled to request and review their personal information that the agency gathers on its forms. They information corrected. To review such information, contact us at 512/239-3282. TCEQ-0585 (Rev. 10-01-04) contact us at 210/4 0-3096 for may also have any errors in their Page 2 of 2 Attachment A Geologic Assessment Table AAV, a w �F+ w w O m d U 2 z 0 U w I.L a w z ''w^^ v/ w N N -J O 0 'w V z 0 V 0 PHYSICAL SETTING z 0 1- 0 O 0 p 0 0 p 4) 2 a) y 2 0 N 0 a (1) 0 N -o .y o N 2 0 N 2 0 2 0 N 2 0 0 a) 241 2 X X X X X X X X X X X X X X X X SENSITIVITY of X X X X X X X X X X X X X X X X rn M N 0 -J O O O J M CO J N. M 0 J M (C) 0 J (f) M 0 -J (C) M (f) J CO O 1 J M 1.00 -J O -J U) O J O M (D O J O M co M CN O -J op 0) CO 0 -J M L O 2 LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL U �LL w Z M M z Z C N M Z Z O M Z M Z 0) N Z O) N Z w O Z DIMENSIONS (FEET) C) I N N M CO tt N U) N ([) M �t co >- (-.4 ao M CO (C) M co N LS N CO CO X M O N CN M W N (C) N O O M n N N O O 0 0 LL Y ami 0 Y Y 0 Y a) a) Y 0 Y Y 0 0 Y a') FL) 0 O N O N O M O M O M CO0 O M 0 O M O M O M O M O N O N O N O co N U F- O m a U 97°43'00.98206"W 30°31'16.10328'N LL LL 97°43'00.64862"W 30°31'16.08402"N N LL N 97°43'00.27810"W 30°31'16.35793"N LL N 97°42'59.93982"W 30°31'16.26648"N N 97°43'00.01362"W 30°31'16.21345"N N 97°43'00.28577"W 30°31'16.06042"N N 97°42'59.89105"W 30°31'16.33854"N 0 M LL N 97°42'59.94794"W 30°31'16.42154"N N 97°42'59.65883"W 30°3116.41688"N LL r) LL N 97°42'59.85646"W 30°3116.06789"N N 97°42'59.90423"W 30°31'16.01225"N N 97°42'59.56098"W 30°31'15.79787"N 2 97°42'59.30635"W 30°31'18.13421"N LL 2 97°42'59.50614"W 30°31'18.24472"N 2 97°43'00.92804"W 30°31'17.51839"N LL U 97°42'59.40112"W 30°31'12.60612"N O LL 8A INFILLING None, exposed bedrock Z U O LL> LCL. X 12 TOPOGRAPHY O O 0 O (f) O O O (f) O M N N N M M N M r.1)? a) L 4- .N V) 04 O O o • 0 (n .L • C C O. 2 O o c w N O O C N O (4y E c O • U O c 0 0 m c O �p _M C O 0 voi O U p. f- 00 N O CO N O T o C0 m o m (n c Z m 0 0 c m rn f 3 0 oo o O) ° O L N o 3 m > ami w _(0 c a -o- oE c U N (0(0- 00 L o N (9-E O o U - O. 0 _O �o 65 - C TNRCC-0585-Table (Rev. 5-1-02) Attachment B Surface Soils Description Attachment B Surface Soils Description Naturally occurring surface soils within the proposed Creek Bend Boulevard Extension Project, referred to herein as the project area, are very thin and contain limestone cobbles. This layer (2-8 inches thick) is formed over a soft to hard limestone bedrock, and is typical in the upland areas. Engineering and hydrologic properties of these soils are presented in Table B-1. According to the Soil Survey of Williamson County (Soil Conservation Service [SCS], 1983) the project area is situated on the Eckrant cobbly clay (EaD), Eckrant extremely stony clay (EeB), Eckrant-rock outcrop complex (ErE), Georgetown stony clay loam (GsB), and Oakalla soils (Oc). A soils map is presented as Figure B-1. The EaD soil has a 1 to 8 percent slope and is on undulating uplands. Typically, the surface layer is about 13 inches thick. The lower part is dark brown cobbly clay and the underlying material is coarsely fractured indurated limestone. The EaD soil is calcareous and moderately alkaline. The surface has approximately 50 percent cover of fragments of limestone that are mostly 4 to 8 inches across. This soil well drained and permeability is moderately slow with rapid runoff. The available water capacity is very low. The EeB soil has a 0 to 3 percent slope and is on nearly level to gently sloping areas with broad ridges and shallow valleys on uplands. Typically, this soil has an extremely stony, very dark gray clay surface layer about 11 inches thick. The underlying material is indurated limestone with approximately 25 percent of the surface covered with fragments of limestone that are about 6 inches across but range from 3 inches to 3 feet across and are as much as 10 inches thick. This soil is calcareous and moderately alkaline. This soil well drained and permeability is moderately slow with rapid runoff. The available water capacity is very low because of the shallowness of the soil and stones in the soil. The ErE rock outcrop complex is found on uplands consisting of Eckrant soils and rock outcrop found on hills, ridges, and drainage ways. The soils and rock outcrop are so intricately mixed or so small in area, that mapping them separately was not practical. The slopes range from 5 to 16 percent. This complex is made up of 70 percent Eckrant soils, 15 percent rock outcrop, and 15 percent other soils. Typically, the surface layer of the Eckrant soils is calcareous moderately alkaline, dark grayish brown extremely stony clay about 8 inches thick. The underlying material is fractured indurated limestone. Fragments of limestone from 6 inches to 2 feet across cover about 35 percent of the surface. The rock outcrop consists of exposed limestone bedrock. Loose cobbles and stones on the surface are common. Permeability is moderately slow with rapid runoff. The available water capacity is very low. The GsB soil has a 0 to 2 percent slope and is on nearly level to gently sloping areas on uplands. Typically, the surface layer is slightly acid brown clay loam approximately 7 inches thick. The subsoil 441200/080168 B-1 1134 W coZ (n 0 U W < • O L L. (J) L Q U) J Z O U 0 o `� ▪ Z - I— _H m W O U CO CC L11 H ap U 2 3 0- 0 O z O O CK i/) O Z i- H 0 W Z o a z > - W WD W � Z O m 3 0 Z Z W W CO W W U 441200/080168 2 9- 20 (0 0 c J -J co CO 0 0) o c LLM A 0 I ti O LO LO NN co co I 1 N- ,ct of A 4 0 • LO A ✓ r 2 L0 J U USDA Texture Q c a) U O c 0 c0 2 0 Eckrant, 1 to 8% slopes 0 (0 W 4 I 0 1 z 1 1 U 1 1 m 1 I * N 00) I I I Z 1 1 I 2 1 I 7 1 1 O O Lc) O O O I 1 1 1 1 1 1 1 1 1 1 1 1 Ln 10 10 LO O8 1O M CO I I I CO In I co M LO ' NL NL ' ti ti '' u o 1 10 cb A '1- d' co 0 N N N I I C3) 0 0 0 4. d A 10 10 LO LC) 1 8I d 141)I ' I 7 ' o d d 0 2 m Extremely stony clay Eckrant, 0 to 3% slopes m a) W Y 0 2 D a) m CO Extremely stony clay 1 I U V I U U U U U 0 0 0 0 m m 0 0 c 0 2 L 0 L Q a0 2o L Y (O W f: 0 o co L11 m w CD U Stony clay loam c Z, 0 in E .N ca U o U 0 a) ▪ E >' (1) ▪ va T to >, U 0C t3 Lf) M ti B-2 N/A - Not available. Source: Taylor, Hailey, and Richmond, 1991. EaD - Eckrant cobbly clay EeB - Eckrant extremely stony clay ErE - Eckrant rock outcrop complex GsB - Georgetown stony clay Oc - Oakalla north 0 400 8000 feet Source: SCS 1983 lllllllll11 File: I:\projects\hcl\city of round rock\creek bend\441200.01\cad\soils.ai PBS,' • Engineering • Environmental Consulting • Surveying SOILS MAP - B1 CREEK BEND BOULEVARD EXTENSION ROUND ROCK, WILLIAMSON COUNTY, TEXAS extends to about 35 inches and it is neutral to slightly acid reddish brown clay in the upper part and cobbly clay in the lower part. The underlying material is indurated limestone that has limy earth imbedded in the crevices. This soil is well drained and permeability is slow with medium runoff. The available water capacity is low. The Oc soils, channeled, are on bottom lands in narrow stream valleys. The bottom lands are dissected by numerous channels that are 2 to 6 feet deep, 10 to 30 feet wide and 50 to 500 feet apart. The side slopes of the channels range from approximately 8 percent in gradient to nearly vertical. The soil has a slope of 0 to 1 percent. Typically, the surface layer is dark brown loam about 7 inches thick. The layer below is dark brown clay loam about 16 inches thick. The underlying soil layer to 66 inches is dark brown sandy clay loam. The soil is calcareous and moderately alkaline. These soils are flooded for very brief to brief periods in most years. These soils are well drained and permeability is slow with medium runoff. The available water capacity is high. 441200/080168 B-4 Attachment C Stratigraphic Column Attachment C Stratigraphic Column Creek Bend Boulevard Extension Project Round Rock, Williamson County, Texas Age Unit Description Max Thickness Edwards Limestone (Ked), includes Georgetown Limestone at top. Fine to coarse-grained, medium gray to grayish brown limestone with abundant chert. Lower EdwardsLs. Fossils include rudistids as reefs and individuals, miliolids, and shell fragments; solution zones and collapse breccia are common. Approximately 150-175 feet Cretaceous Upper Glen Rose (Kgru), consists of alternating thin beds of limestone, dolomite and marl. Limestone beds are coarse to fine-grained, hard to soft, light gray to Upper Glen Rose yellowish -gray, and fossiliferous Approximately 400 feet (steinkerns, rudistids, oysters, and echinoids). Dolomite beds are fine-grained, porous, yellowish -brown, and less fossiliferous. 441200/080168 C-1 Attachment D Narrative of Site Specific Geology Attachment D Narrative of Site Specific Geology Creek Bend Boulevard Extension Project Round Rock, Williamson County, Texas 1.0 INTRODUCTION A geologic assessment of the proposed Creek Bend Boulevard Extension Project was conducted by PBS&J pursuant to Texas rules for regulated activities on the Edwards Aquifer Recharge Zone (30 TAC 213). Assessment findings were used to develop recommendations for site construction measures intended to be protective of water resources at the site and adjacent areas. Sixteen geologic features were identified within the project site. No man-made features were found. 1.1 PROJECT DESCRIPTION The proposed site development application is for an extension of Creek Bend Boulevard from Creek Bend Circle to Brightwater Boulevard. The project would consist of continuing the four -lane divided arterial street with a proposed bridge over Brushy Creek and the proposed realignment of Hairy Man Road. The project area is located within an undeveloped tract immediately northeast of the intersection of Wyoming Springs and Brightwater Boulevard in Round Rock, Williamson County, Texas. 1.2 GEOLOGIC ASSESSMENT SCOPE The geologic assessment was conducted in July 2008 and included the following data collection and evaluation tasks: • Published geological and/or hydrological reports for the Williamson County area were reviewed. • Texas Water Development Board records were reviewed for information about water wells at the project site. • A field survey was conducted by a registered professional PBS&J geologist in March and April 2007 to identify hydrologically sensitive geologic and manmade features at the site. The survey consisted of walking the entire project site. Additionally, a Phase II Karst Survey was performed by PBS&J geologists in June 2007 to further define each feature's sensitivity. • An additional field effort was conducted by PBS&J staff in March 2010 to re -excavate the karst features as needed to permit the staff of the Edwards Aquifer Protection Program to conduct a visual evaluation to determine sensitivity to recharge. The original right of entry included a requirement by the landowner to backfill nonsensitive karst features to prevent injury to livestock. 441200/100094 D-1 2.0 SITE GEOLOGY The project site is located within the Edwards Aquifer Recharge Zone (EARZ) defined by the Texas Commission on Environmental Quality (TCEQ). The EARZ occurs where surface water enters the subsurface through exposed limestone bedrock containing faults, fractures, sinkholes, and caves. The project area is underlain by approximately 150 to 175 feet of the Edwards Limestone Formation. The Edwards Limestone Formation (Ked) is the thickest and most permeable of several stratigraphic units that comprise the Edwards aquifer. Composed of relatively pure limestone and dolomite, the Edwards Formation weathers mainly by dissolution and contains solution features such as honeycombing, sinkholes, and caves. In some areas, the formation is extensively faulted. These characteristics allow for rapid infiltration of surface water on the outcrop, and for rapid movement of groundwater within the aquifer. The Edwards Limestone Formation (Ked) is fine- to coarse-grained, gray to grayish -brown, fossiliferous (rudistids, milliolids and shell fragments), thick -bedded to massive, and cherty. Solution zones and collapse breccias are common. 2.1 TOPOGRAPHY AND SURFACE DRAINAGE The project site is located on gently to moderately sloping terrain, which drains primarily to the north- northeast toward Brushy Creek. Surface elevations in the project site vary from a minimum of approximately 730 feet above mean sea level (msl) along Brushy Creek to a maximum of approximately 805 feet msl at the southwest end (Wyoming Springs Drive). 2.2 STRUCTURAL GEOLOGY The structural geology of the region is dominated by normal faults of the Balcones fault zone, which have a predominant northeast strike. The rock strata beneath the site dip to the east-northeast at about 50 feet per mile (less than 1°), and the northeast -trending Balcones Fault Zone is located about 1 mile east of the site. Mapping by the Bureau of Economic Geology (BEG) indicates one, geologically inactive normal fault located about 0.25 mile northeast of the project area (BEG, 1974). A normal fault is an inclined fault in which the hanging wall appears to have slipped downward relative to the footwall. Additional faults are located further to the northeast and southeast of the project site within the Balcones Fault Zone. There is no evidence of faulting within the project site; however, a series of surface fractures in the exposed bedrock is visible along primary and secondary orientations. 2.3 STRATIGRAPHY The Edwards Limestone outcrop at the site's surface within knoll -like upland contours and is underlain by the Upper Glen Rose. A stratigraphic column is included as Attachment C to the geologic assessment. 441200/100094 D-2 The Edwards Limestone which outcrops at the site has been determined to be the Grainstone Member of the Kainer Formation. This member is estimated to be 15-20 feet in thickness and is underlain by the Kirschberg Member. Due to the relative thickness of the Grainstone Member the potential for karst development from surface influence is very limited. 2.4 GEOLOGIC AND MAN-MADE FEATURES A field survey of the project site was conducted by PBS&J geologists in March and April 2007. A total of 16 geologic features occur within the project site. No man-made features were identified within the project site. As previously discussed, a Phase II investigation of known site karst features was conducted in June 2007 by qualified PBS&J geologists (Figure D-1). An excavation of each feature was performed using hand tools only. These features would have been left open after excavation; however, the features (except F-8) were backfilled at the landowners request with rocks to prevent injury to his livestock. At the request of the TCEQ, the features (except F-8) were re -excavated and inspected in March 2010 before being backfilled (April 2010) with soil and rocks. The results of these investigations are as follows: F-1: This feature was excavated to a maximum depth of 3.5 feet when the excavation was terminated upon encountering massive, hard clay packed infilling containing a thick root matrix (Appendix, Photograph F-1). A heavy metal bar, which was used to probe the fill, encountered a solid rock bottom at 4 feet below ground level. Closure of this feature consisted of backfilling with variable size stones level with the surrounding ground surface. F-2: This feature was excavated to a depth of 3.5 feet, encountering a massive infilling of hard packed clay containing a thick root matrix (Appendix, Photograph F-2). A solid rock bottom was detected by probing with the bar at 4 feet, as the walls of the joint beneath the fill taper inward to joint closure at the center. Closure was by clay and stone backfilling to surrounding ground level. F-3: An attempt to excavate this solution -enlarged fracture was made; however, narrowing solid walls of the fracture prevented reaching the fill materials beyond a depth of 3.5 feet (Appendix, Photograph F-3). The fill was compacted clay with a thick root matrix. The bar probe indicated joint closure at approximately 4 feet. Closure was by clay and stone backfilling to level grade. F -3A: This solution -enlarged fracture was excavated to a maximum depth of 3.5 feet, to reveal the rock joint closed to a thin fracture (Appendix, Photograph F -3A). Closure was clay and stone backfilling to level grade. F -3B: This solution -enlarged fracture was excavated to a depth of 2.5 feet to reveal a solid floor and the closure of the rock joint (Appendix, Photograph F -3B). Closure was by clay and stone backfilling to level grade. 441200/100094 D-3 ri - � r t • .. k t , f F it � r , , • I " f �. ' .. _<,t. •'ra ._`.'•f,^:: - � ill , F-R �♦ II � v 6A IC ♦♦ II F-7 F-3E ♦ �I F-3C F-3D II •� I'� F-31 F-3B _ � I < Aw II R i' u x • ^ n { 1 4 yyn F x s. w , v t t n �j I, r JI - 90s sirs I V pl r r I • • Preliminary Centerline Engineering Environmental Consulting • Surveying Environmental Study Limits north GEOLOGY MAP-D1 0 250 500 feet F-1 o I<arst Feature CREEK BEND BOULEVARD EXTENSION Ked Edwards Limesotne Formation ROUND ROCK, WILLIAMSON COUNTY, TEXAS Source: City of Round Rock File: 1:\projects\hc1\city of round rock\cedar bend\441200.01\cad\geology_fig.ai F -3C: This solution -enlarged fracture was excavated to a depth of 3.5 feet to reveal a solid rock bottom and closure of the rock joint at 4 feet (Appendix, Photograph F -3C). Closure was by clay and stone backfilling to level grade. F -3D: This solution -enlarged fracture was excavated to a maximum depth of 1.75 feet, when further probing revealed a solid rock bottom at 2 feet below grade (Appendix, Photograph F -3D). Closure was by clay and stone backfilling to level grade. Two smaller adjacent sink depressions were also excavated revealing identical results, and were stone backfilled. F -3E: This solution -enlarged fracture was excavated at the northwest end to a depth of 2.5 feet, and further probing in the massive fill revealed a solid rock bottom and closure of the rock joint at 3 feet (Appendix, Photograph F -3E). Closure was by stone backfilling to level grade. F -3F: This solution -enlarged fracture was excavated to a depth of 3 feet, revealing a solid rock bottom and closure of the rock joint (Appendix, Photograph F -3F). Closure was by stone backfilling to level grade. F -3G: This solution -enlarged fracture was excavated to a depth of 3.75 feet, through a hard packed clay infilling with thick root matrix (Appendix, Photograph F -3G). Probing revealed a narrowing angular rock joint at 4 feet. Closure was by clay and stone backfilling to level grade. F -3H: This solution -enlarged fracture was excavated to a depth of 1.75 feet, through hard packed clay infilling with thick root matrix (Appendix, Photograph F -3H). The remaining fill was probed to a solid rock bottom at 2 feet. Closure was by clay and stone backfilling to level grade. F -3I: This solution -enlarged fracture was excavated to a depth of 2.5 feet at which a solid rock bottom was encountered and exposed (Appendix, Photograph F -3I). All rock jointing was tightly closed. Closure was by clay and stone backfilling to level grade. F-6: This sinkhole was excavated to a depth of 1 foot at which point the partially exposed portal through solid bedrock was exposed and revealed to be too small to pursue further (Appendix, Photograph F-6). At this point, the feature's interior was probed vertically with the bar to reveal a thick infilling to the 3.5 feet depth and narrow rock sides. The excavation was terminated and the feature was closed by stone backfilling to level grade. F -6A: This adjacent (northwest) sinkhole was excavated to a depth of 1 foot at which point the rock joint portal narrowed to only 1 inch wide (Appendix, Photograph F -6A). Probing in the joint revealed a clay infilling and joint closure at 1.5 feet depth. Closure was by stone backfilling to level grade. F-7: This sinkhole was excavated near the west side to a depth of 1.5 feet at which a solid bedrock bottom was encountered (Appendix, Photograph F-7). The excavation was extended over towards the center of the surface depression, which revealed a very small portal (6 -inch -diameter). This area was excavated to 2 441200/100094 D-5 feet where a rock bottom with small clay filled fracture only 0.5 inch wide was observed. At this point, this excavation point was abandoned, and a new hole was dug directly over the center low point of the surface sink depression. This excavation went down through massive hard -packed clay with thick root matrix to the 3 -foot depth level and encountered the top of a rock -lined portal only 8 inches in diameter at the top of the bedrock. This portal remained massively filled and the excavation was terminated at a point where fill removal by hand was no longer possible. The portal was probed to the 4 -foot depth level, and remained massively filled. Closure of both excavation points were by clay and stone backfilling to level grade. F-8: The excavation of this sinkhole was conducted after a large volume of brush debris was removed to reveal the natural surface expression of the karst feature (Appendix, Photograph F-8). The feature was excavated to a depth of 7 feet when a breakthrough into an underlying open void space occurred. The opening into the void space is surrounded by solid rock beneath and at the center of the headwall (south) side of the sink. This portal opens into a low room approximately 30 feet wide, which stair steps down at an angle to the southeast. Access is difficult due to the narrow horizontal passage between the floor and the ceiling. The initial exploration extended short distances to each side and about 12 feet downslope to a narrow constriction. Beyond this constriction is another low wide room that was not accessed at this point of the investigation. A second trip to the sinkhole on June 27, 2007, resumed the investigation with a lengthy, but successful in -cave dig, which opened an access to the lower room. This room extended another 15 feet ahead as a low -wide area to a central point at the back where a small drain portal continues through a constriction too low to follow. A well-defined wash path in the center of the floor of the lower room leads directly to the constriction. Slight to moderate airflow conductivity issuing from the portal indicates that the cave continues for an unknown distance beyond. An underground survey of the cave was performed using a Suuntos magnetic compass/inclinometer and tape measure. This feature has been given the name Creek Bend Cave for identification purposes. The karst features F -3A to F -3I were classified in the initial karst survey as a cluster as defined by Edwards Aquifer Protection Program guidance. However, after further investigation, these features were found to lack subsurface development and do not appear to warrant designation as a cluster. Therefore, these features, which are predominantly epi-karsts and appear to exhibit slow to background infiltration, are now classified as not sensitive. Sensitive recharge features should be protected from the potential impacts of stormwater runoff derived from any type of construction that disturbs the ground surface. The best protection of these features is provided by a natural buffer area size based on the catchment area for the feature. Temporary runoff protection measures should be installed as near the construction as possible to minimize disturbance within buffer zones and drainage areas. According to the Texas Water Development Board (TWDB) electronic database, no water wells were found within the subject property (TWDB, 2008). 441200/100094 D-6 3.0 CONCLUSIONS Sixteen geologic features were found within the site boundaries. One feature, identified as F-8 (Creek Bend Cave), is classified as sensitive in terms of aquifer point recharge. The remaining karst features are not classified as sensitive. Creek Bend Cave is located approximately 130 feet away from the edge of right-of-way/project boundary and, as a result, does not encroach on a protective setback sufficient to provide appropriate protection. However, since the cave is located on property that is not controlled by the project owner, additional measures will be taken within the project boundaries to direct stormwater runoff from the project away from the cave. Project design includes a curb -and -gutter system that will convey stormwater to two on-site retention ponds. Three features (F -3G, F -3H, and F -3I) are located within the proposed right-of-way. The remaining features are located outside of the right-of-way and will not be disturbed by the project. The site generally appears suitable for the proposed development. It should be noted that soil and drainage erosion would increase with ground disturbance. Native grasses and the cobbly content of the soil aid to prevent erosion. Best management practices (BMPs), including soil and sedimentation fencing, will be placed in all appropriate areas prior to any site construction activities. BMPs will be installed adjacent to the right-of-way and upslope from karst feature F-8. Because the project site is located over the Edwards Aquifer Recharge Zone, it is possible that subsurface voids underlie the site. The nature of the subgrade is fault influenced, which can result with variable sized voids in materials that may otherwise not be noted as void or cave forming. If any subsurface voids are encountered during subsurface activities, construction should halt immediately so a geologist may assess potential for the void(s) to provide meaningful recharge to the Edwards Aquifer. 4.0 RECOMMENDATIONS Based on the results of the Phase II karst investigation and this geologic assessment, it is the opinion of PBS&J that the three karst features (F -3G, F -3H, and F -3I) located within the right-of-way be removed to permit the construction of the Preferred Alternative. According to the current design, the proposed grade at feature F3 -I is 10 feet below existing grade and the proposed grade at features F -3G and F -3H is 4 feet below existing grade. The project requires that these features and the surrounding area within the ROW be excavated to achieve required grade. The justification to permanently remove features F -3G, F -3H, and F -3I is based on the following observations: 1) The features have minimal (low) point recharge function due to slow or background infiltration and are therefore classified as "not sensitive." There is no visible evidence of piping soils into the subsurface. 2) The features have developed along secondary fractures and have formed as epi -karst features limited to surface dissolution. 441200/100094 D-7 3) The features do not contain suitable conditions for sustaining habitat for endangered karst invertebrates. PBS&J requests TCEQ to concur with the justification to excavate the three karst features located within the project ROW to proposed grade. These features have been evaluated and are determined to be not sensitive to recharge and therefore do not require protection. The project has successfully avoided impacts to the only sensitive recharge feature in the project area. The project owner will establish and observe a protective setback for Creek Bend Cave for the duration of the construction of this project. The project does not encroach on the sensitive buffer for this feature and therefore is not expected to result in an impact to the feature. 5M REFERENCES Bureau of Economic Geology (BEG). 1974. Geologic Atlas of Texas — Austin Sheet. The University of Texas at Austin, Austin, Texas. Taylor, Hailey, and Richmond, 1991. Soil survey of Williamson County, Texas. Soil Conservation Service, U.S. Department of Agriculture, Washington, D.C. Texas Commission on Environmental Quality, Complying with Edwards Aquifer Rules — Technical Guidance on Best Management Practices, RG -348, Revised July 2005 Texas Water Development Board (TWDB). 2008. Groundwater reports. Retrieved August 6, 2008, from http.// www.twdb.state.tx.us/publications/reports/GroundWaterReports/GWDatabaseReport U.S. Geological Survey (USGS). 1987. Round Rock, Texas 7.5 -minute topographic map. U.S. Department of the Interior, Washington, D.C. 441200/100094 D-8 Appendix Feature Photographs F-1: Sinkhole solution cavity with soil infilling at the base of large exposed bedrock area. F-2: Linear rock joint solution sink with soil infilling (cap on bush for scale). I:\projects\hcl\city of round rock\creek bend\441200.01\cad\photof1-f2.ai F-3: Rock joint solution sink partially soil and root filled. F -3A: (Fracture Zone features): Rock joint solution sink with soil and cobble infilling. I:lprojectslhcl\city of round rock\creek bend\441200.01\cad\photof3-f3a.ai F -3B: Rock joint solution sink (right) with soil infilling, and parallel joint (closed fracture) to the left. F -3C: Linear rock joint solution sink with soil infilling. I:\projects\hcl\city of round rock\creek bend \441200.01\cad\photof3b-f3c.ai F -3D: Rock joint solution sink with soil and leaf litter infilling with cedar branches overlying. F -3E: Rock joint solution sink with heavy soil infilling (center of photo). !:\projects\hcl\city of round rock\creek bend\441200.01\cud\photof3d•f3e.ai F -3F: Linear narrow rock joint sink with loose rock and soil infillinig. A small drainage portal is present by the dislodged surface rock. F -3G: Linear rock joint solution sink with soil infilling, and ground mammal burrows at each end. I:\projecis\hc1\city of round rock\creek bend\441200.01\cad\photof3f•f3g.ai F -3H: Rock joint solution sink with soil infilling. F -3I: Linear rock joint solution sink with partial massive infilling, and partially open at far end. I:\projects\het\city of round rock\creek bead\441200.01\cad\photof3fh-f3i.ai F-6: Small linear rock joint sink with drain portal amidst loose surface cobbles, and small yaupon tree growing out (red hand clippers for scale). F -6A: Small linear rock joint sink (same joint as F-6) with drain portal and loose surface rocks (red hand clippers for scale). I:\projects\hcl\city of round rock\creek bend \441200.01\cad\photof6-f6a.ai F-7: Close-up view of drain portal issuing airflow conductivity from within a large diameter surface sinkhole depression (strong indicator of potential cave). F-8: Cut brush pile placed over a large diameter surface sinkhole (small openings visible through the brush appear to be open holes suggesting a potential semi -open cave entrance). I:\projects\hcl\city of round rock\creek bend\441200.01\cad\photof7-f8.ai Recharge And Transition Zone Exception Request Form 30 TAC §213.9 Effective June 1, 1999 Regulated Entity Name: Creek Bend Boulevard Extension Proiect, Williamson County, Texas 1. X ATTACHMENT A - Nature of Exception. A narrative description of the nature of each exception requested is provided as ATTACHMENT A at the end of this form. All provisions of 30 TAC §213 Subchapter A for which an exception is being requested have been identified in the description. 2. ATTACHMENT B - Documentation of Equivalent Water Quality Protection. Documentation demonstrating equivalent water quality protection for the Edwards Aquifer is provided as ATTACHMENT B at the end of this form. ADMINISTRATIVE INFORMATION 3. X One (1) original and three (3) copies of the completed application has been submitted to the appropriate regional office of the TCEQ. 4. X The applicant understands that no exception will be granted for a prohibited activity in Chapter 213. 5. X The applicant understands that prior approval under this section must be obtained from the executive director for the exception to be authorized. To the best of my knowledge, the responses to this form accurately reflect all information requested concerning the proposed regulated activities and methods to protect the Edwards Aquifer. This RECHARGE AND TRANSITION ZONE EXCEPTION REQUEST FORM application is hereby submitted for TCEQ review and executive director approval. The request was prepared by: Steve McVey, PG, PBS&J Print Name of Customer/Agent t 1 Signature of Customer/Agent % / Date TCEQ-0628 (Rev. 10/01/04) Attachment A Nature of Exception The City of Round Rock is requesting that the Edwards Aquifer Protection Program (EAPP) of the Texas Commission on Environmental Quality (TCEQ) evaluate the geologic assessment and the findings prepared by PBS&J in advance of completion of the Water Pollution Abatement Plan. This exception is being requested in order to allow EAPP to review the findings of the geologic assessment and to seek concurrence on the conclusions and recommendations prepared by PBS&J. The concurrence, if granted, will come to the City of Round Rock in the form of a letter of acceptance from the EAPP for the project to proceed in its current alignment. Attachment B Documentation of Equivalent Water Quality Protection The Creek Bend Boulevard extension project proposes to extend the existing Creek Bend Boulevard from Creek Bend Circle to Wyoming Springs Drive. The project also includes possible modifications to and realignment of Hairy Man Road (Brushy Creek Road). The project has completed an alternatives analysis of three separate alignments (see attached figure). All three alignments have the same starting point (Brightwater Boulevard) and end point (Creek Bend Circle) as those are fixed and cannot move. An alternatives analysis indicated that Alternative Alignment 1 would result in a direct impact to Creek Bend Cave (F-8) which functions as a sensitive recharge feature. The analysis also determined that Alternative Alignment 2 would result in an undesirable impact to the landowner's residence. A third alternative alignment was designed that carefully avoided impacts to both the sensitive recharge feature and to the landowner's residence. However due to the physical restrictions of the starting and ending points, and the highway safety requirements, this alignment directly impacts three karst features identified as F -3G, F -3H, and F -3I. As the identification of these features suggest, they are included as a "cluster" of karst features labeled F-3. According to TCEQ Guidance document "Instruction to Geologist for Geologic Assessments on the Edwards Aquifer Recharge/Transition Zone", a cluster (or zone) is an area in which any type of karst feature occurs along a trend or in a cluster where clustered or aligned features are more likely to be an indicator of an integrated flow system at depth than isolated features. The point value system utilized to evaluate sensitivity to recharge assigns a "zone or cluster" 30 points due to the increased potential to provide integrated flow to the subsurface. The point value system also assigns points relative to the probability for rapid infiltration. The total points assigned the F-3 cluster could reasonably be approaching 40 which the system suggests is considered sensitive to recharge. However, each of the individual features located within the F-3 cluster (F -3A — F3 -I) were hand excavated and inspected for the probability for rapid infiltration. The results of this assessment revealed that all of the F-3 features have infiltration rates classified as "slow" or approaching "background" rates and are therefore not considered to be sensitive despite the categorical point value. In fact, it was observed that several of the excavated features retained storm water for several hours after a recent rain event which confirms the slow infiltration rates for the features. Therefore, the proposed excavation and closure of these three features will not result in a negative effect of recharge to the Edwards Aquifer. As mentioned previously, features F -3G, F -3H, and F-31 are located within the project right-of- way. Feature F -3I is located at the edge of the roadway where the proposed grade is 10 feet below existing grade. Features F -3G and F -3H are located approximately 30 feet outside of the edge of the roadway where the proposed grade is about four feet below existing grade. The project owner will acknowledge a protective setback for Creek Bend Cave. The attached figure illustrates the protective setback and the surface drainage area. The project does not encroach on the sensitive buffer for this feature and therefore is not expected to result in an impact to the feature. The results of the alternatives analysis indicate that Alternative Alignment 3 avoids a sensitive recharge feature (F-8) and the landowner's residence, and meets design criteria for highway safety. Therefore, after careful consideration, Alternative Alignment 3 is classified as the Preferred Alternative. SCHEMATIC ALTERNATIVES LAYOUT CITY OF ROUND ROCK. TEXAS CREEK BEND BLVD EXTENSION SCHEMATIC ALTERNATIVES Yom, �^�'r .; .�� w.. ".% �� yr� PREPARE CI B• : . t c � 4 � z . t f:. SOME ]M' LEGEND �. ALTERNATIVE 1 „. + ALTERNATIVE 2 ALTERNATIVE 3 ! 4 x r! l i Yvp; , a , r. G,5 E. - 0J Creek Bend Cave Creek Bend Boulevard Extension Proposed Protective Setback Creek Bend Cir. to Wyoming Springs Dr. (0.44 miles) Round Rock, Williamson County, Texas CSJ: 0914-05-150 Source s : CORR GIS/ CAPCOG Scale: 1 inch = 100 feet Date: 13 A. ril 2010 Legend Karst Feature Creek Bend Cave Footprint Protective Setback Project Centerline Project ROW Boundary 2ft Contour —1> Surface Flow Surface Drainage Area 0 50 100 150 Feet State Plane, Texas Central, NAD83, Feet NJClients/4_R/RoundRock_City/044120001Marst Location.mxd Agent Authorization Form For Required Signature Edwards Aquifer Protection Program Relating to 30 TAC Chapter 213 Effective June 1, 1999 James R. Nuse, PE Print Name City Manager Title - Owner/President/Other of City of Round Rock, Texas Corporation/Partnership/Entity Name have authorized Steve McVey, PG Print Name of Agent/Engineer of PBS&J Print Name of Firm to represent and act on the behalf of the above named Corporation, Partnership, or Entity for the purpose of preparing and submitting this plan application to the Texas Commission on Environmental Quality (TCEQ) for the review and approval consideration of regulated activities. I also understand that: 1. The applicant is responsible for compliance with 30 Texas Administrative Code Chapter 213 and any condition of the TCEQ's approval letter. The TCEQ is authorized to assess administrative penalties of up to $10,000 per day per violation. 2. For applicants who are not the property owner, but who have the right to control and possess the property, additional authorization is required from the owner. 3. Application fees are due and payable at the time the application is submitted. The application fee must be sent to the TCEQ cashier or to the appropriate regional office. The application will not be considered until the correct fee is received by the commission. TCEQ-0599 (Rev.10/01/04) Page 1 of 2 4. A notarized copy of the Agent Authorization Form must be provided for the person preparing the application, and this form must accompany the completed application. "/-3O-/0 ,appicant's Sic'nature Date THE STATE OF l-etr § County of William § BEFORE ME, the undersigned authority, on this day personally appeared ThM %-2.111f4Q it.known to me to be the person whose name is subscribed to the foregoing instrument, and ackn6wledged to me that (s)he executed same for the purpose and consideration therein expressed. GIVEN under my hand and seal of office on this iday of i 1 ,21A0 . SARA L. WHITE MY COMMISSION EXPIRES July 11, 2012 .274444k. eat NOTARY PUBLIC SAY14 L. Whrl-Q, Typed or Printed Name of Notary MY COMMISSION EXPIRES:(!] I (,Z)i2 . TCEQ-0599 (Rev.10/01/04) Page 2 of 2 Texas Commission on Environmental Quality Edwards Aquifer Protection Program Application Fee Form NAME OF PROPOSED REGULATED ENTITY: Creek Bend Boulevard Extension Project REGULATED ENTITY LOCATION: Round Rock, Williamson County, Texas NAME OF CUSTOMER: City of Round Rock Public Works Operations CONTACT PERSON: James R. Nuse, P.E. PHONE: 512.218.5401 (Please Print) Customer Reference Number (if issued): CN 600413181 (nine digits) Regulated Entity Reference Number(if issued): RN (nine digits) Austin Regional Office (3373) ❑ Hays ❑ Travis ❑x Williamson San Antonio Regional Office (3362) ❑ Bexar ❑ Comal ❑ Medina ❑ Kinney ❑ Uvalde Application fees must be paid by check, certified check, or money order, payable to the Texas Commission on Environmental Quality. Your canceled check will serve as your receipt. This form must be submitted with your fee payment. This payment is being submitted to (Check One): El Austin Regional Office ❑ Mailed to TCEQ: TCEQ — Cashier Revenues Section Mail Code 214 P.O. Box 13088 Austin, TX 78711-3088 ❑ San Antonio Regional Office ❑ Overnight Delivery to TCEQ: TCEQ - Cashier 12100 Park 35 Circle Building A, 3rd Floor Austin, TX 78753 512/239-0347 Site Location (Check All That Apply): ❑x Recharge Zone ❑ Contributing Zone ❑ Transition Zone Type of Plan Size Fee Due Water Pollution Abatement Plan, Contributing Zone Plan: One Single Family Residential Dwelling Acres $ Water Pollution Abatement Plan, Contributing Zone Plan: Multiple Single Family Residential and Parks Acres $ Water Pollution Abatement Plan, Contributing Zone Plan: Non-residential Acres $ Sewage Collection System L.F. $ Lift Stations without sewer lines Acres $ Underground or Aboveground Storage Tank Facility Tanks $ Piping System(s)(only) Each $ Exception 1 Each $ 500.00 Extension of Time Each $ Signa(tu If you havE questions on how to fill out this form or about the Edwards Aquifer protection program, please contact us at 2101490- 3096 for projects located in the San Antonio Region or 512/339-2929 for projects located in the Austin Region. Individuals are entitled to request and review their personal information that the agency gathers on its forms. They may also have any errors in their information corrected. To review such information, contact us at 512/239-3282. TCEQ-0574 (Rev. 4/25/08) 4- 30-r0 Date Page 1 of 1 Texas Commission on Environmental Quality Edwards Aquifer Protection Program Application Fee Schedule 30 TAC Chapter 213 (effective 05/01/2008) Water Pollution Abatement Plans and Modifications Contributing Zone P PROJECT PROJECT AREA IN ACRES FEE One Single Family Residential Dwelling < 5 $650 Multiple Single Family Residential and Parks < 5 $1,500 5 < 10 $3,000 10 < 40 $4,000 40 < 100 $6,500 100 < 500 $8,000 ?. 500 $10,000 Non-residential (Commercial, industrial, institutional, multi -family residential, schools, and other sites where < 1 < 1 5 $3,000 $4,000 regulated activities will occur) 5 < 10 $5,000 10 < 40 $6,500 40 < 100 $8,000 >_ 100 $10,000 Organized Sewage CoI PROJECT COST PER LINEAR FOOT MINIMUM FEE MAXIMUM FEE Sewage Collection Systems $0.50 $650 - $6,500 Underground and Aboveground St PROJECT COST PER TANK OR PIPING SYSTEM MINIMUM FEE MAXIMUM FEE Underground and Aboveground Storage Tank Facility $650 $650 - $6,500 Exception Requests PROJECT FEE Exception Request $500 PROJECT Extension of Time Requests FEE Extension of Time Request $150 TCEQ-0574 (Rev. 4/25/08) Page 2 of 2 !mm® -71iftsj TCEQ TCEQ Core Data Form TCEQ Use Only For detailed instructions regarding completion of this form, please read the Core Data Form Instructions or call 512-239-5175. SECTION I: General Information 1. ►1 Reason for Submission (If other is checked please describe in space provided) New Permit, Registration or Authorization (Core Data Form should be submitted with the program application) ❑ Renewal (Core Data Form should be submitted with the renewal form) ❑ Other ❑ /1 2. Attachments Describe Any Attachments: (ex. Title VApplication, Waste Transporter Application, etc.) ❑Yes No ❑ New Customer ❑ Update to Customer Information ❑Change in Legal Name (Verifiable with the Texas Secretary of State) 3. Customer Reference Number (if issued) Follow this link to search 4. Regulated Entity Reference Number (if issued) CN 600413181 for CN or RN numbers in RN Central Registry*" SECTION II: Customer Information 5. Effective Date for Customer Information Updates (mm/ddlyyyy) ' New Regulated Entity ❑ Update to Regulated Entity Name ❑ Update to Regulated Entity Information ❑ No Change*" (See below) 6. Customer Role (Proposed or Actual) - as it relates to the Regulated Entity listed on this form. Please check only one of the following: Owner ❑Occupational Licensee ❑ /1 Operator ❑ Owner & Operator Responsible Party ❑ Voluntary Cleanup Applicant ❑Other: 7. General Customer Information ❑ New Customer ❑ Update to Customer Information ❑Change in Legal Name (Verifiable with the Texas Secretary of State) ❑ ' Change in Regulated Entity Ownership No Change" **If "No Change" and Section ! is complete, skip to Section ll! - Regulated Entity Information. 8. Type of Customer: ❑ Corporation ❑ Individual ❑ Sole Proprietorship- D.B.A ►� City Government ❑ County Government ❑ Federal Government ❑ State Government ❑ Other Government ❑ General Partnership ❑ Limited Partnership ❑ Other: 9. Customer Legal Name (If an individual, last first: If new Customer, enter previous Customer Doe, print name ex: John) End Date: below City of Round Rock 10. Mailing Address: City of Round Rock Public Works Operations 2008 Enterprise Drive City Round Rock State TX ZIP 78664 ZIP + 4 11. Country Mailing Information (if outside USA) 12. E -Mail Address (if applicable) dbartels@round-rock.tx.us 13. Telephone Number ( 512 ) 218-5555 14. Extension or Code 1 15. Fax Number (if applicable) 1 ( 512) 218-5563 16. Federal Tax ID (sdigits) 746017485 17. TX State Franchise Tax ID (it digits) NA 18. DUNS Number(irapplicable) 19. TX SOS Filing Number (if applicable) 20. Number of Employees ❑ 0-20 ❑ 21-100 ❑ 101-250 ❑ 251-500 501 and higher 21. Independently Owned and Operated? I ❑ Yes ❑ No SECTION III: Regulated Entity Information 22. General Regulated Entity Information (If 'New Regulated Entity" is selected below this form should be accompanied by a permit application) ' New Regulated Entity ❑ Update to Regulated Entity Name ❑ Update to Regulated Entity Information ❑ No Change*" (See below) **If "NO CHANGE" is checked and Section 1 is complete, skip to Section IV, Preparer Information. 23. Regulated Entity Name (name of the site where the regulated action is taking place) Creek Bend Boulevard Extension Project TCEQ-10400 (09/07) Page 1 of 2 24. Street Address of the Regulated Entity: (No P.O. Boxes) No address available; approximately 8.1417 acres of undeveloped land between Creek Bend Circle and Wyoming Springs, Williamson County, Texas City Round Rock State TX ZIP ■ ZIP + 4 Degrees 25. Mailing Address: Seconds Degrees Minutes Seconds City 31 State 97 ZIP 59.56098 ZIP + 4 • 26. E -Mail Address: ■ 27. Telephone Number 28. Extension or Code 29. Fax Number (ifapplicable) ( ) - Sludge ( ) - 30. Primary SIC Code (4 digits) 31. Secondary SIC Code (4 digits) 32. Primary NAICS Code 33. Secondary NAICS Code (5 or 6 digits) (5 or 6 digits) 1611 237310 34. What is the Primary Business of this entity? (Please do not repeat the SIC or NAICS description.) Road extension Questions 34 - 37 address geographic location. Please refer to the inst 35. Description to Physical Location: Located between Creek Bend Circle and Wyoming Springs, Round Rock, Texas 36. Nearest City County State Nearest ZIP Code Round Rock Williamson TX ■ 37. Latitude (N) In Decimal: ■ 38. Longitude (W) In Decimal: Degrees Minutes Seconds Degrees Minutes Seconds 30 31 15.79787 97 42 59.56098 39. TCEQ Programs and ID Numbers Check all P ograms and write in the permits/registration numbers that will be affected by the updates submitted on this form or the updates may not be made. If your Program is not listed, check other and write it in. See the Core Data Form instructions for additional guidance. • Dam Safety • Districts ►/ Edwards Aquifer ■ Industrial Hazardous Waste ■ Municipal Solid Waste Date: LI - 50-10 ■ New Source Review - Air • OSSF • Petroleum Storage Tank ■ PWS ■ Sludge • Stormwater ■ Title V - Air IN Tires ■ Used Oil ■ Utilities ■ Voluntary Cleanup • Waste Water • Wastewater Agriculture ■ Water Rights • Other: SECTION IV: Preparer Information 40. Name: Steve McVey, PG 41. Title: 42. Telephone Number 43. Ext./Code Group Manager 44. Fax Number 45. E -Mail Address ( 512) 342-3400 ( 512 ) 327-2453 srmcvey @pbsj.com SECTION V: Authorized Signature 46. By my signature below, I certify, to the best of my knowledge, that the information provided in this form is true and complete, and that I have signature authority to submit this form on behalf of the entity specified in Section II, Field 9 and/or as required for the updates to the ID numbers identified in field 39. (See the Core Data Form instructions for more information on who should sign this form. Company: James R. Nuse, P.E. Job Title: City Manager NamepnPrint): City of Round Rock, Texas Phone: ( 512 ) 218-5401 Signature: • ,,----_._-_. Date: LI - 50-10 TCEQ-10400 (09/07) Page 2 of 2 a) > 0 cn cn c c ._ o 8_ cn (f) c U)0) I -U E -0 o >>.l Fo -00 a) (D m i7.2 . — a) 0 2 - 0 0 g co ... a) 2 0 ROUND ROCK, TEXAS PURPOSE. PASSION. PROSPERITY. City Manager Approval Summary Sheet Consider executing a Recharge and Transition Zone Exception Request with TCEQ for the Item Caption: Creek Bend Blvd Extension Project Approval Date: April 30, 2010 Department: Transportation Services Project Manager: David Bartels Item Summary: The Texas Commission on Environmental Quality (TCEQ) is requiring the City to submit an exception request for review of the Geologic Assessment in advance of the Water Pollution Abatement Plan (WPAP). TCEQ will determine if recharge of the Karst features discovered in the proposed project right-of-way will affect the roadway alignment. The extension of Creek Bend Blvd from Creek Bend Circle to Wyoming Springs Drive includes construction of a 4 -lane divided arterial roadway with curb and gutter, a bridge over Brushy Creek, bicycle/pedestrian facilities within the right-of-way and drainage and adjustments to utilities. This roadway extension will provide a new north -south crossing of Brushy Creek west of IH 35, which will improve mobility, add travel capacity, improve safety by providing an all-weather crossing of Brushy Creek between IH 35 and Parmer Lane and improve emergency response times. Strategic Plan Relevance: Cost: $ 500.00 Source of Funds: 2002, 2004 and 2007 GO Bonds and Federal Funds REV. 3/8/10 10.1909 Request for City Council/City Manager Action IM City Council MI City Manager Submit completed form for all City Manager and City Council approvals. Department Name: Transportation Services Contact Person: Chaz Gordon / Kathy Michna Project Mgr/Resource: David Bartels Project Coordinator: Assigned Attorney: Steve Sheets City Council or City Manager Approval Date: Agenda Wording For HUmintra on © ie ONLY Receiv : APR 2 8 2010 hn,,.16.- Tag#: _ 04A -loo Original Documents Received: Project Name: Creek Bend Blvd Extension ContractorNendor: TCEQ Funding Source: 2002 General Obligation Bonds Additional funding Source: 2004 and 2007 GO Bonds and Federal Funds Amount: $ Account Number. 4/30/2010 Consider executing a Recharge and Transition Zone Exception Request with TCEQ for the Creek Bend Blvd Extension Project. 500.00 1 Finance Information Is Funding Required? Initial Construction Contract Construction Contract Amendment Change Order Change in Quantity Initial Professional Services Agreement Supplemental Professional Service Agreement Purchasing/Service Agreement Purchase Order Item(s) to be purchased Yes Q No 0 EUnforeseen Circumstances Other (Please clearly identify action below) TCEQ Exception Request Fee Amount $ 500.00 Project Mgr. Signature: Dept. Director Signature: *City Attomey Signature: City Manager Signature: (Z(.1 (o -4/tqz... i Date: 'City Attorney signature is required for all items. REVISED 4/26/2010 LEGAL DEPARTMENT APPROVAL FOR CITY COUNCIL/CITY MANAGER ACTION Required for Submission of ALL City Council and City Manager Items Department Name: Public Works Project Mgr/Resource: David Bartels [JCouncil Action: 1 ORDINANCE Agenda Wording Project Name: Creek Bend Blvd Extension Proj ContractorNendor: TCEQ RESOLUTION FICity Manager Approval CMA Wording Consider executing a Recharge and Transition Zone Exception Request with TCEQ for the Creek Bend Blvd. Extension Project. Attorney Approval ED/Attorney Notes/Comments Date fl 4'4 , /0 0:lwdox1S CC In tsto 127110001M IS Ct00190845. XLS Updated 6/3/08