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HomeMy WebLinkAboutMINUTES - 01162001 - D5 Recorded at the request of: ,� �f Contra Costa County Public Works Department CONTRA COSTA Co Recorder Office STEPHEN �. Engineering Services Division WEIR t Clerk-Recorder Return to: CCC— 2001-0024900-00 Public works Department Thursday, FEB 01, 2001 15:03:34 Engineering Services Division FRE so,00 Ttl Rd $0.00 Nor-0I rc/RS 1.16 THE BOARD OF SUPERVISORS OF CONTRA COSTA COUNTY, CALIFORNIA Adopted this Resolution on January 16, 2001 by the following vote: AYES: SUP'ERVISOR'S 'GIOIA, GERBER, DeSAULNIER, GLOVER and UILKEMA NOES: NONE ABSENT: NONE ABSTAIN: NONE RESOLUTION NO.: 2001/23 SUBJECT: Accept Completion of Improvements MS 64-90,Marsh Creek area. The Public Works Director has notified this Board that the improvements in Sgbdivision MS 64- 90 have been completed. The improvements have been inspected by county staff(both Public Warks and Building Inspection). The improvements as constructed do satisfy the County's minimum standards and are shown on the improvement plans(and all subsequent revisions). The original plans dated May 29, 1992 were designed by Mr. Andrew. Palffy (RCE #43704). Subsequent revisions(reducing the costs)were designed by Mr.Robert J.Costa(RCE#14230). The original plans contained road and drainage improvements that were superior to the revised plans and exceeded both the County's minimum standards and the minor subdivision's conditions of approval. I hereby certify that this is a true and correct copy of an action taken and entered on the minutes of the Board of Supervisors on the date shown. ATTESTED: January 16, 2001 PHIL BATCHELOR,Clerk of the Board of Supervisors and Counv Administrator By ADeputy RESOLUTION NO.2001/ 2 3 SUBJECT: Accept Completion of Improvements MS 64-90,Marsh Creek area. DATE: January 16, 2001 PAGE: 2 The revised plans result in a road much more rural in nature and a road that will likely require increased long-term maintenance costs. But those revised plans meet the County's and general accepted minimum engineering standards. The Parcel Map for this development was approved by this Board on June 22, 1993 and the road and drainage improvements were constructed without the need for agreements or bonds. NOW THEREFORE BE IT RESOLVED that the improvements have been COMPLETED as of January 16,2001 and improvements are private and therefore,no warranty period is required. RL:Iap G:\GrpData\EngSvc\BO\2001lTenip\NlS 64-90.doc Originator: Public Works(ES) Contact Rich Lierly(313-2348) cc: Public Works Tax I.D. or SSN Accounting R.Bruno,Construction Div. 1.Florin,M&T Lab Maintenance Div. Recorder(via Clerk),then PW Engineering Services Sheriff-Patrol Div.Commander CAP,c%Al CSAA—Cartog Bradford Financial,345 Lorton Avenue,Ste.304,Burlingame,CA 94010 Robert Costa,2388 Todds Creat Dr.,Bend,OR 97701 Andrew Paiffy,1440 Maria Lane,Ste.200,walnut Creek,CA 94596 RESOLUTION NO. 2001/ 2 3 REC 1VEY JAN 16 2001 CLERK TRAC TSTA r-0. 3Rs 1/16/01 TO: Board of Supervisors Contra Costa County RE: Construction of Bragdon Way Load To all perspective board members: The Homeowners Association of Bragdon Way, respectfully request that the subdivision road of Bragdon;Way,not be approved at this time due to concerns with the following: ■ Collect&Convey of Surface Water ■ Compaction ■ The Homeowners have independently hired two separate civil& structural engineers to assess the road. The homeowners have sent the board a copy of their findings. The findings are evidence that the proper compaction and the proper catch&convey of surface water was not implemented in the construction of Bragdon Way. If the county fails to address these issues,the result could lead to a failure in this road and"County Liability." This road has already had two FAILURES to date. ■ If the county is truly convinced that this road has been built by county standards and specifications,the county should readily be willing to dedicate this road. The homeowners expect and are willing to provide routine and expected"normal maintenance"for Bragdon Way. The homeowners also expect that the county does not accept and approve a subdivision road that does not meet county standards and that is in danger of failing. ■ RECOMINIENDED PROPOSAL: The homeowners suggest that an impartial and independent engineer be hired by the county or developer to assess the above-mentioned concerns regarding Bragdon Way. This engineer should be approved by all parties concerned. There are other concerns regarding this road that have been previously discussed with the county but not thoroughly looked into. These include the retaining walls,width of the road,etc. The homeowners feel that these are also important and relevant issues. Due to time constraints,our engineers were unable to assess these issues. Based on the Evidence that the homeowners have presented to the board,via engineers' reports &photographs,we respectfully ask that Bragdon Way not be accepted at this time. Please do not allow this road to FAIL! Homeowner's Association of Bragdon Way 1 RECEIVED 5 JAN 10 2001 WAYNE ING & CLERK B AR ' CONTRACC�5T ASSOCIATES, INC. GEOTECHNICAL ENGINEERS Project No. 1485-01 7 October 2000 Ms. Marlene Michaud 5433K Clayton Road##PMB 352 Clayton, CA 94517-1039 Subject: RESPONSE TO THE CONCERN OF EARTH MOVEMENT Proposed Access Roadway Off Marsh Creek Road Clayton, California References: 11 Site Feasibility Study By ENGEO, Inc. Dated November 29, 1989 21 Preliminary Engineering Geology Study of Proposed Access Road By ENGEO, Inc. Dated August 9, 1990 31 Geotechnical Risk Assessment By Purcell,Rhoades&Associates Dated November 28, 1997 Dear Ms. Michaud: At your request, Wayne Ting & Associates, Inc. (WTAI) has performed a reconnaissance and drilled 8 exploratory borings, at the distressed roadway locations, at the subject site. The purpose of this study was to investigate the thickness and relative density of the engineered fill under the access roadway. The thickness and relative density of the engineered fall are presented in the boring logs and Tables I and II, respectively. Besides drilling exploratory borings, WTAI also reviewed the referenced reports. According to reference 1,a portion of the proposed access road, on Parcel B, is in a landslide area. This landslide is considered to be an active earthflow. References 2 and 3 recommended subsurface borings be performed along the proposed access roadway to allow for engineering recommendations and design. This subsurface study should include the depth to slide planes,nature of slide materials and thickness of the existing fill. Surface drainage control measures were also recommended to be constructed along the entire roadway alignment. In addition,the roadway should be sloping into the hill. Surface runoff should be collected with drainage ditches and diverted to culverts extending under the road. Runoff must not be allowed to flow across the.face of cut and fall slopes. 44360 S. Grimmer Blvd. . Fremont:CA 94638 +T,&(510)623-7768 m Fax: (510)6237861 * E-mail:wt1ng46272*ao1.com Project No. 1485-01 7 October 2000 Furthermore, pages 10 and 11 of Reference 3 recommended the keyways be extended at least 4 feet into stiff to dense soil and sloped at a minimum gradient of 5 percent into the hillside. The width of keyways must be at least 12-foot wide. Engineered fills within the keyways must be compacted to at least 95 percent relative compaction at about 3 percent over optimum moisture content. Engineered fill above the keyways or in benched areas should be compacted to a minimum of 90 percent relative compaction. Fill slopes should not exceed a slope gradient of 2:1 (MV). Also,the top 12 inches of the subgrade soil must be compacted.to at least 95 percent at 2 percent above the optimum moisture content. Additionally, subdrains must be constructed in the keyway during the construction of the engineered fill slopes. Mage 10 ofR.eference2 also recommended the landslide hazard should be mitigated by construction of a drained engineered buttress fill keyed into firm bedrock. Lite Qbse tions and CoMments During our site visit,we observed cracks up to 1-inch wide along the roadway. Two sections of the roadway had slid and been repaired with rip rapping. These locations are indicated on the attached plan. Moreover,many sections ofthe roadway are riot sloping into the hill. Surface drainage control measures have not been constructed. We also had a discus9tofi With one ofthe horneoWners,Ms. Darlene Michaud, regarding to the earth movement of the access roadway according to Ms. Michaud's information, abovementioned additional'subsurface borings were not,performed:along the proposed access road asrecommended in References 1'and 3;° The rdIad*ay'started to show signs of cracking after it was pawed for about one week. WTAI conducted soil sampling at the distressed locations. Detailed'description of the materials encountered at these'Wiiions and relative density'of the engineered fill and native soil are shown in Figures 2 through 10. Based on our observations,laboratory testing results and the information provided by Mrs.Michaud,: it'is our opinion that the causes of distress of the access roadway are provided as follows: 1). Inadequate compactioft'ofenAineered fill slopes: Some locations of fills were not compacted to the required aninirriurn relative compaction of 90%. 2). We to the access roan is located in the slide area;(see siteplan;Figure 1),the recommended slide niti atiori°irieassi t'es'ncludina the excavation of`keyways below the`existing slide plane, bench engineered' i1is intci fi trative.rnaterials;and installation of subdrains might have not been properly constructed. 3). Poor surface drainage g ontrol and runoff:, Mage 2 WAYNE TING ASSOCUTEs;INC. Project No. 1485-01 7 October 2000 4�. Page 12 of reference 2, recommends that the pavement sections should have 3.0 inches of asphaltic concrete 'over 9 inches of aggregate base. However, in boring 2, the existing pavement section only consisted of 2.5 inches of asphaltic concrete and 6.5 inches of aggregate base. mitaticrns and L niformit,-of Con&hons Qur client should recognize that this report is prepared to assist in evaluating the likely causes of distress of the access roadway off Marsh Creek Road. This report has been prepared for the exclusive use of the client. The opinions and conclusions contained in this report are based on: a site visit by Mr. Minh Le on August 30,2000;exploratory borings;and the information provided by one ofthe homeowners,Mrs. Darlene Michaud. The exploratory borings were performed to determine the thickness and relative density of the engineered fill. They should not be used for access roadway recommendations. The items discussed in this report are subject to revision should more information become available. Cour professional services,findings,and recommendations were prepared in accordance with generally accepted engineering principles and practices. No other warranty, expressed or implied, is made. Should you have any questions relating to the contents of this letter,please contact our office at your convenience. Very truly yours, G WAYNE TING& ASSOCIATES,INC. FESSI 'W Wayne L. Ting, C.E. ft Principal Engineer No. 46276 . Exp. / - Copies: 3 to Ms. Michaud ter 1V14 �" Page 3 WAYNE TING do ASSOCIATE'S,INC. FroSec't No.1700-M 7 October 2000 „ Mokoh Crmk RD".contra Cc>etfi county,Calfforrria� r• ' j• '� ;fie r! ' .! ` �. �,�#se z�.`5° '. 3" 1 t, rift �• `;. �' • i � •.7�. i�`.�j r ~ •.t rad.' S t ,�a. � t 7 y � •'4 W� d 4��Y. r• ., •t a 1 r � h 100. . � �!, . � 5I IIS �`•v,, a w• �u�aa " � ` tri t 5.. r*�r• �Y��s i •��'. s i'. .t•.' ''.ra �x��" 5. CJS °`,. Ir „�e`y;,{_ f5�. iJ��� ` ,li�a a h. '3" ''i;' J' a, t �,ri r•� • i aw�°'.�•�r• f ',x .r� `tn�t%e. � `,�' - .'t"t. ;" ^' k�a �� .: •��x r. .l.+G �'"b # .. �t Pt �. �W,,.,M✓��'!tE a. + •' rk »t".d"!.. ., .. rys�.'':'.,.•.w�'"'..Y•r�� �j 4 ,ye . rel.' �' �C.' •�r .i �t "v..i * �..rL: F OSx �_� .•:�. t ACTIVE LANDSLIDE y-�`.4r'�'"i.0�'9Pci:� y ......�.•...,....,-•w.•te.+:6.kthiri�i.s�'.ra..La rt�"d`'�."". �i �.st ts,.s��k�ri i�•� ..r i h'i''.'t y. 'ti, f '{ t •w`�':•'.. '.t i&k', �'�'r ,r,sat 5 ,e'•f q ' GURE b OF jVXERENCE j a , t•" ' « 5w' .�, ti i sa YtrSt'1e•�.,a. �.A � � 1'+x 3W1'#Sr tei t N �51G i a F� I Ili I � T• a.rr r��'4'.�nl �'� .' ar �y,'k ... ,re�� "t .1'.. 'at��i}'�I ��''�hTtx'dr' t. X. N� .¢ ri�+,�i`tri:Y �11'f, i•7 a�r ��w�.��.�a'�'• ''+.�i x.. 4r��' _ A• d 'j�,l p•'K ��1^t Y•.:�� J"�5 f r•�, �a i• �5•�h'" r,•a-i4.a+'a}' ',,ae'i,�'Y!� y4 .•r,;•:8:�. 5;}�t.SGe`\,F. ri. •2Y'. rya `+.5 'r +� n �y�, . i�t k1 ''.s'A. 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C j r ,t •C�` .• 'y W aT' .• .V t! t��?t'.�q $ra"w1� !'�'$ � :•$(=it bx� r A`5+S,"'�•r t s 4. t+a. i _ .p, `x'gSr "+•` it i Y�i•�s,ttY _ i '}t;9'.ki :. ,•. x"? } .:;'" '"`yr %4?`.4tP. .•'3'. + rxw.na jy>.,.ya waYrvE� 1hj� � OME PLAIN F4ura NO-4 ASSOCIATES, INC. page No. ¢ �GAId:1'y=�� GEprectINtCAL&4GI EE'RS Marsh Creek road,Contra Costa County,California Project#1700-01 12 5eptcmber 2000 Description . z 0 u � � �. ur Remarks Z' cs a . B1 Light gray aggregate baeerock,11 inches(fill)- 2 Dark brown and reddish brown slaty clay,very 1-1 15 104.9 21.7 3 molst,stiff(fie) 4 Brown silty clay with sand,varymolet,very stiff 1-2 28 106.4 19.7 5 arm na a FI ure No.2 FIo groundwater encountered 6 7 8 9 10 . 11 12 - 132 Tvf 1 Light gray aggregate baeerock,.6.5,inches(fill) 2 Light brown silty clay with sand,very moist (fill) 3 Liglif Frown 611rY CIATFM aan ,very M010t, (native' 2-1 13 108.5 18.4 4 5 6 7 firm 2-2 8 99.5 23.8 8 ` Light Drown oury clay,s ama vay mos , na ve 10 1i 2-3 14 100.9 21.0 12 arming AT No groundwater encountered WAYRE NG $c BC?RINCS L0051 & 2 ' Figura No.3 ASSOCIATES, INC. GEOTECHNICAL SEN+ IWXRs ©ate Drilled: 30 August 2000 0y: M.L. Page Nq.5 Marelh Creek Koad,Contra Costa County,California Project#1700-01 12 5apCember 2000 LL L ' x, poscriptionLt p a Kemarks u B gray c Brown silty clay,moietand stiff(fill) 2 light Drowns clay,moIR an s , na va 3 Brown siltstone, 3-1 15 100.9 15.6 orminatea at 6.5Figure No groundwater encountered 5 6 7 8 9 10 - 11 12 134 1 Brown silty clay with sand,very moist and soft to 2 firm(fill) 41 10 59.6 21.4 3 4 5MgffirFrowm ailTy clay,very moeft M Ott(nativ7e 6 4-2 16 105.9 19.3 7 ermina a . 70 No groundwater encountered 8 9 10 11 12 WAYNE LTING & 13ORINO L063 3 & 4 Figure No.4 ASSOCIATES, INC. GEOTECHNICAL ENGINEERS Date Driited: 30 August 2000 By. M.L. Page No.107 Marsh Creek load,Contra Costa CoumtG6 California Project#1700-01 12 5eptamber 2000 4 Description � tri 1 U. � 8 to I 1Zemarke i, v .0 csi LlenT, r g aserocK, Drown silty clay,moist,and danse 5-1 16 105.4 12.0 2 Light brown sandstone,moist,moderately da ea 3 arm na a gure No groundwater encountered 4 5 ' 6 7 8 9 10 11 12 MN 10 Incorlm V1117 1 rown ollfy7 coy,9-fliT ama mosT(maTlv7a 2 0-1 10 113.1 13.3 3 4 g-2 8 107.5 14.7 erminaTM a No groundwater encountered 7 S 9 10 11 12 TINAYNE IN ( w 00RING L005 5 & 6 Figure No.0 ASSOCIATES, INC. GE07LCHNICAL ENGINEERS ipate oriiled. 30 August 2000 t3y: M.L. Wage No. 7 Mar6h Crack Road,Contra Costa County,Californla i'roject#1700•01 12 5qtember 2000 U. Description z cri � � � � Karnarke J c: �- it ! 'Llcty c� ar s L a; 0 X37 Drown aiq clay wim eam ama can a ne fragment",moist and atiff(fill) 2 7-1 14 110.4 14.5 3 4 5 . 6 7 8 FM35h Frowm e7y-clay,very moa a e (native) 10 wct 7-2 12 111.8 31.2 11 arminata AT . ours 12 No groundwatar encountered B� 1 rown Filty clay WM 604 and McF; 2 eandatona fragments,moist,firm,(fill) 3 8.1 9 109.7 12.8 4 5 6 7 FOdish Orown s c ay,moa an s , na ve 8 9 arml mateA at.Ob 10 No groundwater encountered 11 12 iNAYNE ING ,$c OORING LDG5 7& 6 Flgure No.8 .ASSOCIATES, INC. GEOTECHNICAL-ENGINEERS Date Orflle .- 30 Auguet 2000 f jy M.L. Page Not 43 Marsh,Creek Road Project No. 1485.01 Clayton City,California 7 October 2000 TABLE I Summnary.of Laboratory Teat Results soil im 29 +, Mme.Dry Density Moisture (1) BRsilty clay with traces of gravel,(fin) 118.7 p.c.f. 13.90/6 (2) h brown silty clay with,sand 118.3 p.c.f 10.6% TABLE H Summary of Field Density Teat Rmdts Rquired Test Date of Approx. Max Dry Test Dry Moisture Relative Miniamum Curve .No TSg Test Location g 041114111 COM29WOR C=NGdU b (fed) ( a)d) (%) Cyo) (%) 1 8/30/2000 B 1 -2.5 118.5 104.9 21.7 89 90 1&2 2 8/30/2000 B1 -4.0 118.7 106.4 19.7 90 90 1 3 8/30/2000 1 B2 -15 118.3 106.5 18.4 90 90 2 4 8/30/2000 B2 -6.5 118.3 99.5 23.8 84 90 2 5 8/30!2000 B2 -10.5 118.7 106.9 21.0 90 90 1 6 8/30/2000 B3 -2.5 118.7 106.9 15.6 90 90 1 7 8/30/2000 B4 -2A 118.3 89.6 21.4 76 90 2 8 8/30/2000 B4 -5.5 118.3 108.9 19.3 92 90 2 9 8/30/2000 B5 -1.5 118.7 105.4 12.6 89 90 1 10 8/30/2000 B6 -1.5 118.3 113.1 13.3 96 90 2 11 8/30/2000 B6 -4.5 118.3 107.5 14.7 91 90 2 12 8/30/2000 B7 -1.5 118.3 116.4 14.5 98 90 2 13 8/30/2000 B7 -10.0 118.7 111.8 31.2 94 90 1 14 8/30/2000 B7 -3.5 118.3 109.7 12.8 93 90 2 i 9 WAYNE TING&ASSOC`IATES,INC. NEW & NEW ENGINEERING,G, iNC. CIVIL A STRUCTURAL. ENGINEERING $SURVEYING 0 PROJECT MANAGEMENT 7181 Tbamdkle Chive,Oakhmd,CA 94611-1030 TEC.510-339-98'87.EAX 339AM Bragdon Way Home Owners Association February 28, 2000 F.O. Box 326 R.nightsen, CA. 94548 Attention: Mr. &Mrs. Rodger Habig Re: Storm Water Damage Bragdon Way Road Surface. In accordance with your request, New &New Engineering,Inc. inspected the Storm Water damage to Bragdon Way Road that resulted form the recent storms. Bragdon Way is located approximately six miles,East from Clayton,CA. on Marsh Greek Road and is the main access road to the various properties owned by the members of the Bragdon Way Home Owners Association. The road is approximately 6,400 fin. ft. in length and is paved with Asphaltic Concrete in various sections lengths with grades of 10%or greater, and in graveled surface in various sections length with grades less than 10%. Road grades vary from 00/a to 15%for the total length of the roadway. There are eight sections with A.C. pavement„ estimated to be 3300 lin. ft. in total length and eight sections with gravel surface, estimated to be 3 10 0 lin. ft. in total length. There is one-30" diameter Concrete Drainage Culvert in a dry creek channel located about 2000-ft up the road from the intersection with Marsh Creek Road. New &New Engineering,Inc. inspection on February 24, 2000 of the roadway, indicated some surface damage(nothing major) in several of the roadway sections, both AC paved and Gravel surfaced sections. There is evidence of storm water erosion along the uphill side in the ditch area, and where the storm water has flowed across the roadway, erosion was noticed along the outer or lower side of the roadway, in bath graveled and AC paved sections. In some cases the storm water has flowed across several of the graveled surface sections and has resulted in serious surface erosion. In the AG paved sections the storm water flow has deposited gravel debris on the paved surfaces,which makes it very difficult and dangerous for ream wheel drive vehicles to travel up some of the steep roadway grades. Page No. 1 of 3 Bragdon'Way(Continued) The section of the roadway just above the intersection with Marsh Creek Road is eroded on the uphill or right side and the gravel debris has washed down onto the Marsh Creek road. It is obvious than travel on Bragdon Way roadway in its existing condition can potentially be disrupted unless a maintenance program is started, especially during the winter storm periods. This activity has not been performed with the exception of diverting some of the water flow with sandbags in a couple of areas. It is our recommendation that a maintenance program be initiated immediately to perform the fallowing activities. Phase No. 1 Recommended to prevent finther damage and possible travel disruption. 1. Excavate the major eroded ditch areas for a V-ditch, 2-ft wide and I-ft deep, and fill the V-ditch with 8" x 3"rock rip rap to channel the storm water and to prevent further erosion to the roadway surface. Channel the storm water by sandbag diversion dikes so the water will flow over the top of the asphalt pavement sections. Be prepared to place the rip rap rock in any road shoulder erosion areas that may develop by the above diversion effort. Place rock rip rap in the existing road shoulder areas that are eroded. 2. Sweep the gravel debris off the AC paved roadway back into the ditch area or the adjacent graveled surface area. 3. Any and all surface cracks developing within the AC surface areas should be sealed to prevent water from entering the roadway subbase. 4. Any roadway cut slope slides that may block the roadway surface drainage should be removed immediately. Phase No. 2 Recommended to minimize future maintenance work . The permanent solution to minimized the storm water problem on Bragdon Way is more complex. In the first place, outside of roadway maintenance,no construction can take plane during the winter storm season. Page No. 2 of 3 5 . Bragdon Way(Continued) In our opinion, all storm water should be contained on the cut slope or right side of the roadway and channeled under the roadway via 12" diameter cross drain culverts at locations along the roadway that can handle the flow without causing erosion on the downhill side. Each Culvert would have a redwood plank or Concrete Block inlet, structure and all ditch channels should be excavated and rock rip rap lined. It appears that 6 to 8 cross-drain culvert may be required. In addition,the gravel surface area should be paved with asphalt concrete. To design and construct the required storm drainage system for Bmgdon Way will require design layout and details drawing for review and approval by the County of Contra Costa and construction by a Civil Construction Company. To develop the design drawings will require a field survey of the existing Road way and an Engineering study to locate the cross-drain culverts at locations to prevent downslope erosion and disturbance to downslope property owners. New&New Engineering,Inc. would be please to prepare a cost proposal to the Bragdon Way Home Owners Association for the'above field survey and design work. Sincerely yours, G New &New Engineering, Inc. 7181 norndale Drive Oakland, CA. 94611-1031 RM ' ua Na C 303716 OF CAUf Page No. 3 of 3 ADDENDUM TO ITEM D.5 January 16, 2001 Agenda On this date, the Board of Supervisors considered accepting the completion of improvements for Minor Subdivision 64-90, Marsh Creek, Area. Mike Carlson, Construction, Public Works presented the staff report. The Board opened the public hearing, and the following people appeared to speak: John Pound, representing the Bragdon Homeowners Assoc.; Wayne Ting and Associates, Geotechnical Engineers, 44360 S. Grimmer Blvd., Fremont, for Bragdon Homeowners; Steve Pollak, Attorney for Bradford Financial (developers), 700 El Camino Real, Ste 201, Millbrae; Dean Affeldt, Geotechnical firm of Purcell, Rhoades & Associates, 1041 Hook Avenue, Pleasant Hill; Steven Schulhauser, Schulhauser Engineering, Inc., 426 Donegal Way, Lafayette; The following people presented speaker cards, but did not chose to speak: Joe Ambrosin, Geotechnical firm Purcell, Rhoades & Associates, 1041 Hook Avenue, Pleasant Hill; Kandy Habig, Bragdon Homeowners Assoc., 3000 Bragdon Way, Clayton. Those desiring to speak having been heard, the Board considered the matter. Following further discussion, the Board took the following action: Supervisor Glover moved to accept the completion of the improvements for MS 64-90, in the Marsh Creek area. Supervisor Gioia seconded the motion, and the Board voted unanimously to accept it.