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Home My WebLink AboutMINUTES - 06082004 - C25 TO: BOARD OF SUPERVISORS,AS GOVERNING BOARD OF CONTRA COSTA COUNTY AND CONTRA COSTA COUNTY FLOOD CONTROL AND NATER CONSERVATION DISTRICT FROM: MAURICE M. SHIU, CHIEF ENGINEER DATE: June 8, 2004 SUBJECT: DETERMINE that the Drainage Area 30C, Line A Outfall Structure Modification project is a California Environmental Quality Act (CEQA) Class 2 Categorical Exemption; APPROVE the project and AUTHORIZE the Chief Engineer to advertise the project,Brentwood area. [CDD-CP# 03-58] DA30C Funds (100%), (District III) Project No. 7558-6D8488 Specific Request(s)or Recommendation(s)&Background&Justification L RECOMMENDED ACTION: DETERMINE that the Drainage Area 30C, Line A Outfall Structure Modification project is a California Environmental Quality Act(CEQA) Class 2 Categorical Exemption, and APPROVE the project, and AUTHORIZE the Chief Engineer to advertise the project, and DIRECT the Director of Community Development to file a Notice of Exemption with the County Clerk,and AUTHORIZE the Chief Engineer to arrange for payment of a $25 fee to Community Development for processing, and a$25 fee to the County Clerk for filing the Notice of Exemption. .01 Continued on Attachment: X SIGNATURE: ,-RECOMMENDATION OF COUNTY ADMINISTRATOR RECOMMENDATION OF BOARD COMMITTEE APPROVE OTHER SIGNATURE(S) ACTION OF BO ON , 2004 APPROVED AS RECOMMENDED xx OTHER VOTE OF SUPERVISORS xx UNANIMOUS(ABSENT NONE ) I hereby certify that this is a true and correct AYES: NOES: copy of an action taken and entered on the ABSENT: ABSTAIN: minutes of the Board of Supervisors on the date shown. TT: G:\Grpdata\EngSvc\ENVIRO\BO\2004\(06-08-04)CEQA-DA30CLineA-0utfallStr.doc Orig.Div: Public Works(Environmental) JUNE 08 2004 Contact: Leigh Chavez(3-2236) ATTESTED: s cc: Administrator-E.Kuevor JOHN SWEETEN, Clerk of the Board of Auditor-Controller Supervisors and County Administrator Community Development—M.Whigham Public Works: Accounting Construction -P.Edwards j Flood Control -K.Emigh By rR ,Deputy -R.Urbina Eng.Serv. -L.Chavez -T.Torres SUBJECT: DETERMINE that the Drainage Area 30C, Line A Outfall Structure Modification project is a California Environmental Quality Act (CEQA) Class 2 Categorical Exemption; APPROVE the project and AUTHORIZE the Chief Engineer to advertise the project, Brentwood area. [CDD-CP# 03-58] DA30C (100%), (District III)Project No. 755$-6D8488 DATE: June 8, 2004 PAGE: 2 II. FINANCIAL IMPACT: The estimated project cost for the project is $45,000 funded by Drainage Area 30C (100%). III. REASONS FOR RECOMMENDATION/BACKGROUND: The project is located along Line A of DA 30C in the city of Brentwood,west of Brentwood Boulevard and north of Marsh Creek Channel. The purpose of the project is to modify the existing outlet structure in order to accommodate higher flows during high intensity storms. The project consists of lengthening the existing outlet structure by approximately sixteen feet and slightly angling the structure to allow flows to move through the outlet more efficiently.The existing structure will be trimmed to remove the front wall and parts of the floor slab to provide a clean surface to connect the new section of the structure with dowels. In addition, the top six feet of the side walls of the existing structure will be trimmed off. The new structure will sit on a 12-inch thick reinforced concrete slab. A perforated 4-inch plastic pipe will be buried around the concrete section of the floor slab to provide underground drainage. The pipes will be connected to weep holes at the base of the walls,which will drain into the structure. The perforated pipe will be surrounded by pervious material from the top of the slab to approximately five feet above the slab to improve subsurface drainage into the structure. Construction activities will be in the immediate vicinity of the structure and conducted from top of bank. The project has been determined to be in compliance with the General Plan and is exempt from CEQA. IV. CONSEQUENCES OF NEGATIVE ACTION: Delay in approving the projects may result in a delay of design and construction and may jeopardize funding. CONTRA PUBLIC WORKS DEPARTMENT COSTA INITIAL STUDY COUNTY OF ENVIRONMENTAL SIGNIFICANCE 'PROJECT# 7558-6D8488 CP# 03-58 PROJECT NAME: Drainage Area 30C Line A, Outlet Structure Modification PREPARED BY: Trina. TorresDATE: April 16, 2004 APPROVED BY: 44?54 u&, �e s`' DATE: 5-112,/CYZ/ RECOMMENDATIONS: (X) Categorical Exemption (Class 2) ( ) Negative Declaration ( ) Environment Impact Report Required ( ) Mitigated Negative Declaration The project will not have a significant effect on the environment. The recommendation is based on the following: This project consists of the reconstruction of an existing pudic facility. The new facility will be located on the same site as the existing facility and will ha ve substantially the same purpose and capacity as the facility replaced. What changes to the project would mitigate the identified impacts: N/A USES Quad Sheet: Brentwood Base Map Sheet #K-25 Parcel # N/A GENERAL CONSIDERATIONS: 1. Location: The project is located along Line A of DA 30C in the city of Brentwood, west of Brentwood Boulevard and north of Marsh Creek Channel (.figures 1-4). 2. Project Description: The purpose of the project is to modify the existing outlet structure in order to accommodate higher flows during high intensity storms. The project consists of lengthening the existing outlet structure by approximately sixteen feet and slightly angling the structure to allow flows to move through the outlet more efficiently (Fig. 4). The existing structure will be trimmed to remove the front wall and parts of the floor slab to provide a clean surface to connect the new section of the structure with dowels. In addition, the top six feet of the side walls of the existing structure will be trimmed off. The new structure will sit on a 12-inch thick reinforced concrete slab. A perforated 4-inch plastic pipe will be buried around the concrete section of the floor slab to provide underground drainage. The pipes will be connected to weep holes at the base of the walls, which will drain into the structure. The perforated pipe will be surrounded by pervious material from the top of the slab to approximately five feet above the slab to improve subsurface drainage into the structure. Construction activities will be in the immediate vicinity of the structure and conducted from top of bank. During construction, the contractor will implement a dewatering system. The design of the system will be at the discretion of the contractor, but will be reviewed by the County and the California Department of Fish and Game. The repair activity will be kept to the minimum necessary to accomplish the repair, and the work site will be kept clear of construction debris. Environmentally Sensitive Area (ESA) fencing will be installed to clearly define the project limits and impact area. Standard Best Management Practices (BMPs) will be implemented such as locating stockpiles outside of the streamzone, fueling and maintaining equipment at designated staging areas, and maintaining a clean worksite will be employed. Any exposed slopes will be seeded with a mix of native grasses upon completion of the project. G:\GrpData\EngSvc\ENVIRO\Piood Control\DA 30C Line A-Outlet Struct\CEQA\Initiai Study.doc (Page "I of 2) Although Burrowing Owls (Athene cunicularia) are known from the general area, the project is located in the immediate vicinity of Brentwood Boulevard and is surrounded by homes; therefore, occupied burrows are not expected in the area. Nevertheless, in order to ensure potential impacts are minimized, the District will conduct preconstruction surveys for Burrowing Owls. In order to minimize damage to trees, any roots exposed during excavation will be cut cleanly and tree branches and shrubbery may need trimming throughout the project. Real property transactions, including right-of-way acquisition may be necessary in support of this project. General Plan Conformance will be obtained from the City of Brentwood. 3. Does it appear that any feature of the project will generate significant public concern? [ ] yes [x) no [ ].maybe (Nature of concern): 4. Will the project require approval or permits by other than a County agency? [X] yes [ ] no agency Name(s). ➢ California Department of Fish and Game (1501 Permit) ➢ Regional Water Quality Control Board Water Quality Certification (401 Permit) ➢ City of Brentwood — General Plan Conformance (GPC) 5. Is the project within the Sphere of Influence of any city? Yes; City of Brentwood G:1GrpData\EngSvc\ENVIRO\,food Control\DA 30C Line A-Outlet Struct\CEQA\initial Study.doc (Page 2 of 2) Notice of Exemption Contra Costa County Community Development Department 651 Pine Street, 4th Floor- North Wing, McBrien Administration Building Martinez,CA 94553-0095 Telephone:{925)313-2296 contact Person:Cece Selig -Pu iic Works Dept. Project Description, Common Name (if any)and Location:Drainage Area 30C Line A, Outlet Structure Modification, County File CP# 173-38. Project Description: The project is located along Line A of DA 30C in the city of Brentwood, west of Brentwood Boulevard and north of Marsh Creek Channel. The purpose of the project is to modify the existing outlet structure in order to accommodate higher flows during high intensity storms. The project consists of lengthening the existing outlet structure by approximately sixteen feet and slightly angling the structure to allow flows to move through the outiet more efficiently(Fig.4).The existing structure will be trimmed to remove the front wail and parts of the floor slab to provide a clean surface to connect the new section of the structure with dowels. In addition,the top six feet of the side walls of the existing structure will be trimmed off. The new structure will sit on a 12-inch thick reinforced concrete slab. A perforated 4-inch plastic pipe will be buried around the concrete section of the floor slab to provide underground drainage. The pipes will be connected to weep holes at the base of the walls,which will drain into the structure. The perforated pipe will be surrounded by pervious material from the top of the slab to approximately five feet above the stab to improve subsurface drainage into the structure. Construction activities will be in the immediate vicinity of the structure and conducted from top of bank. During construction,the contractor will implement a dewatering system.The design of the system will be at the discretion of the contractor, but will be reviewed by the County and the California Department of Fish and Game. The repair activity will be kept to the minimum necessary to accomplish the repair, and the work site will be kept clear of construction debris. Environmentally Sensitive Area (ESA)fencing will be installed to clearly define the .project limits and impact area. Standard Best Management Practices (BMPs)will be x implemented such as locating stockpiles outside of the streamzone,fueling and maintaining equipment at designated staging areas,and maintaining a clean worksite will be employed. Any exposed slopes will be seeded with a mix of native grasses upon completion of the project. Although Burrowing Owls(Athene cunicularia)are known from the general area,the project is located in the immediate vicinity of Brentwood Boulevard and is surrounded by homes;therefore,occupied burrows are not expected in the area: Nevertheless, in order to ensure potential Impacts are minimized, the District will conduct preconstrvction surveys for Burrowing Owls. } t In order to minimize damage to trees, any roots exposed during excavation will be cut cleanly and tree ° branches and shrubbery may need trimming throughout the project. Deal property transactions,including • (F,:' right-of-way acquisition may be necessary in support of this project. General Plan Conformance will be obtained from the City of Brentwood. fir This project is exempt from CEQA as a: Ministerial Project(Sec.15268) _ Other Statutory Exemption,Section r Declared Emergency(Sec.15269(x)) _ General Rule of Applicability[Section 15061(b)(3)) Emergency Project(Sec. 15269(b)or(c)) � ' ✓ Categorical Exemption, Class.2 for the following reason(s). Tbis ro'ectctnsistsofthereconstruction of'sn existinP ublicfacilit . Thenewfacilrty willbelocatedonthe samesiteasthe aristin fecalithandwdllbevesubstantiallythesamepurposeandwpacitJ, as the Iscility replaced. S Date: By: Community Development Department Representative AFFIDAVIT OF PILING AND POSTING I declare that on I received and posted this notice as required by California Public Resources Code Section 21152(c). Said notice will remain posted for 30 days from the fling date. Signature Title Applicant: County Public Works Department 255 Glacier Drive Martinez,CA 94553 Attn: Trina Torres County Clerk Fee$50 Due G:\GrpData\EngSvc\ENVIROI,food Centrol\DA 30C Line A-Outlet Snuet\CEQA\NOE.doc yr-t..n w \t vit" t..t vv7nVivlvleiYltlL 4t Ul'.Lf! Y Hl✓.i. .... .. ... ... Notice of Exemption Contra Costa County Community Development Department 651 (cine Street, 4th Floor- North Wing, McBrien Administration Building Martinez, CA 94553-0095 Telephone:(925)3.13-2296 contact Person:Cece Selloren - Public Works Debt. Project Description', Common Name (if any) and Location: Drainage Area 30C Dine A, Outlet Structure Modification, County File CP# 113-58. Project Description: The project is located along Line A of DA 30C in the city of Brentwood, west of Brentwood Boulevard and north of Marsh geek Channel. The purpose of the project is to modify the existing outlet structure in order to accommodate higher flows during high intensity storms. The project consists of lengthening the existing outlet structure by approximately sixteen feet and slightly angling the structure to allow flows to move through the outlet more efficiently(Fig.4).The existing structure will be trimmed to remove the frontwall and parts of the floor slab to provide a clean surface to connect the new section of the structure with dowels. In addition, the top six feet of the side walls of the existing structure will be trimmed off. The new structure will sit on a 12-inch thick reinforced concrete slab. A perforated 4-inch plastic pipe will be buried around the concrete section of the floor slab to provide underground drainage. The pipes will be connected to weep holes at the base of the walls,which will drain into the structure. The perforated pipe will be surrounded by pervious material from the top of the slab to approximately five feet above the slab to improve subsurface drainage into the structure. Construction activities will] be in the immediate vicinity of the structure and conducted from top of bank. During construction,the contractor will implement a dewatering system.The design of the system will be at the discretion of the contractor, but will be reviewed by the County and the California Department of Fish and Game. The repair activity will be kept to the minimum necessary to accomplish the repair,and the work site will be kept clear of construction debris, Environmentally Sensitive Area (ESA)fencing will be installed to clearly define the project limits and impact area. Standard Best Management Practices (BMPs)will be implemented such as locating stockpiles outside'of the streamzone, fueling and maintaining equipment at designated staging areas,and maintaining a clean worksite will be employed. Any exposed slopes will be seeded with a mix of native grasses upon completion of the project. Although Burrowing Owls(Athene cunlcularia)are known from the general area,the project is located in the immediate vicinity of Brentwood Boulevard and is surrounded by homes;therefore,occupied burrows are not expected in the area. Nevertheless, in order to ensure potential impacts are minimized, the District will conduct preconstruction surveys for Burrowing Owls. In order to minimize damage to trees, any roots exposed during excavation will be cut cleanly and tree ` s t ', . branches and shrubbery may need trimming throughout the project, Real property transactions, including aa` right-o€-way acquisition may be necessary in support of this project. General Plan Conformance will be ` obtained from the City of Brentwood. r� This project is exempt from CEQA as a: a Ministerial Project(Sec. 15268) Other Statutory Exemption,Section Declared Emergency(Sec.15269(a)) i General Rule of Applicability[Section 15061(b)(3)) Emergency Project(Sec. 15269(b)or(c)) Categorical Exemption, CT µ for the tolloevin-reason(s): TIi sprojectco.nsists of the reconstr-uction ofen existL2gpublrcfadUl y T"12enewfaciYV will be located ori the same site as the existing:acfliotand wid have substantially the same purpose and capacity :;9• t ,;. astheAcrlityreplacad. Date: $y, Community Development Depatttr=t Represewative AFFIDAVIT OF FILING AND POSTING I declare that on I received and posted this notice as required by California Public Resources Code Section 21152(c). Said notice will remain posted for 30 days from the filing date. Signature Title Applicant: County Public Works Department 255 Glacier Drive Martinez,CA 94553 Attn: Trina Torres County Clerk Fee$50 Due v:\GrpData\r-ngSvcl£.NVIRC}Tlood ConrolIDA 30C Line A-Outlet 5truct\CEQAW0E.doc r--1 �1J Q v.� t �+ ds x a 1 r� � i t Lf) 4N; � iyx 'Ey7, NO y a CYJ IN icc MW 00 s y6 s NT y1/1 t .� 3"i' k K sA k Ayi fiCC-�'� rkY std, q � v � � ,• ' 77� +•° r-�i4 � "' "`�+`"'s.,r� ...s^'"- '%.�t :a KC �, .,s � r'`R,�' tip` "�� «�"i)„'t s �e ,r ,.. �, a 4 �4 h• y roc b 'r 2`* l� �,�s��... i4 x ` xy�•+'�r+�Y'�. ::.4.`5�.. e t� � Int.Y # � ��, S 'Yt�` ,q t" ", �'.+-�Y��r 'k*'krf�:�..• #,., ,Mr ew�.x A• ^1 *R >��? c•y�. 4� Y=.• a L-t"�+ {�r rt u .ir6>b .qt R ,•y k 9P 4 1 'r�y' � p� xt i '4�� f S< •nM' tiP �� 3 P ��.�+- �}. Y` .� l .. y �,gg ; y_ r ,x E}� �',• }a Y .e..r. Sr ;°g $IRj Fi3 +1 '±` �,r r 3 � S �`M ', �"1.� � kyr•1L y ••r x t •A S R #' } R } � '.a,�j'Y. !p'Y 4'�"'�'"`! #^�t•°�1"1S �I,r 77. lei ZAAS kC x� Z. 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