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Home My WebLink AboutEngineer's Field Report - PLN General - 10/18/2007 (10/1WON) Mark Core 100907FLDRPTadd 1.pdf Page 1 `WARNER C:/V/!ENG/NEEA'/NG a 01 A^JN/NC:7 ENGINEER'S FIELD REPORT-ADDENDUM PROJECT: Hood Canal K-8 School FIELD 2 REPORT NO.: (Addendum) CONTRACTOR: Jones&Roberts(General) PROJECT NO.: 019064 SECO(Civil Sub-contractor) DATE: October 18,2007 WEATHER: — TIME: — TEMP. RANGE: PRESENT AT SITE: DISCUSSION/OBSERVATION The following is an Addendum to Field Report#2,dated October 9,2007: The contractor shall add the following interim temporary erosion and sediment control measure to field report#2,effective immediately: Item(5)Install tiprap protection on the spillway between the wet pond and the infiltration pond. If there are any questions or clarifications needed,please contact me. End of Report f AIVA •o 0. SroIVAL �' EXPIRES 08 10 6 Report By:Trent A.Ward,PE 2709 JAHN AVE NW SUITE H-5•GIG HARBOR,WA 98335 TEL(253)858-8577•FAX(253)858-8579 low (Yw li ��Iu a I i CU � Page L �'V�MATAWMAW ENGINEER'S FIELD REPORT --- —-------...- -.- PROJECT: I-food Canal K-8 School Flk-LV 2 i REPORT NO.: Jones&- Roberts(General) 019064 CONTRACTOR: SECO(Civil Sub-contractor) PROJECT NO.: IJATE: October 9, 2007 WEATHER: Overcast TINM: 1.00 PM '1713MP. 60 deg F+/- RANGE: Gay Larson, GALCo Engr- PRESENT AT Steve Brannon,Jones&c Roberts SITE: Keith Tibbets, SECO _ John Sliva, Mason Cty PW DISCUSSI O MOBSERVATION Onsite meeting with John Sliva, Mason County, Gary Larson, GAI.Cu Hngr., Steve Brannon, Jones &c Roberts, and Keith Tibbets, SECO, to inspect the onsite stormwater wet-pond, infiltration pond and biofiltration Swale. These facilities are not complete at this time. The wet pond liner is installed and the wet pond is full of stormwater, but the wet pond berm/gravel filter berm has not been constructed yet,the bottoms and side slopes of the pond facilities have not been seeded and no vegetation has been established, and the biofiltration swale has not been finish graded and properly vegetated. Given the current wet weather conditions and give", we are starting the wet season, it was agreed by all parties present that it is impractical to attempt to complete the wet pond berm construction and biofiltration construction at this time,and completion may be deferred until the dry season 2008. John Sliva, Mason County, indicated that the County would uccept the current, incomplete condition that the pond facilities and biofiltration facility are in with the provision that written temporary erosion &c sediment control installation requirements (TESL) and maintenance; requirements be provided to the County outlining the temporary measures to be put in place at this time in order to prevent wet season erosion and degradation of the facilities, until such time next year (2008) when these facilities are completed, during the dry season. Therefore, the fallowing is an outline of interim requirements the Contractor is required to perlbrm, efTectively immediately: (1) Apply temporary erosion control seed ntix and ntinitnum 2"-3" thickness of straw mulch to promote grass establishment, on all areas between access road and pond. Alternatively,apply seed mix and cover awith plastic cover to promote grass establishment. (Note: mulch or plastic cover are required until 75% grass cover is established); H 1 Report By: Trent A. Ward, PE —- 2709 JAHN AVE NW SUI1M H-5•GIG HARBOR,WA 98335"►TEL(253)858-8577 to FAX(253)858-8579 LL O O 10 1 i w j I1) C . 0 O f0 a Page2 (2) Apply temporary erosion control seed niix and tight-woven,jute netting or matting on all pond side- slopes to promote grass establishment (Caution - care must be exercised when staking jute netting/matting so as to not puncture the PVC liner installed with the wet pond side slopes). Alternatively, apply seed alix and eover with plastic to promote grass establishment. (Note: jute netting/nlatting or plastic cover are required until 7504.grass cover is established); (3)Install two rock check-dams,evenly spaced along the biofiltration Swale bottom, perpendicular to the flow of water. Check darns are to be minimum 12" in height and constructed of crushed rock with slopes of2.:1 maximum; (4)Remove all sediment within infiltration pond and scarify bottom to restore infiltration function; Upon completion of initial installation of the above measures, the contractor shall maintain these measures throughout the wet season as follows: (A) Inspect all measures on a weekly basis, and after all runoff-producing storm events between October 1" and April 30", (inspect all measures on a monthly basis (minimum) and within 48 hours of a storm event, between May 1"and September 30".) (13) All mulched areas must have mulch added as required to maintain minimum cover thickness until grass cover is established. (C)Remove sediment fi-om rock check dams when sediment height equals one-half the check danl height. (0) Remove sediment from infiltration pond facility immediately upon observing, and maintain a scarified pond bottom surface. The contractor is to exercise extra care when working within the infiltration pond so as to not compact the pond bottom and adversely affect its infiltration function. (E)Maintain all pipe out-fall protections, and remove:sediment buildup as required. All pond and bioflln•atiorl swale facilities construction shall be completed, inspected and accepted, per contract documents, within the dry season of 2008, and all permanent erosion and sediment control provisions will be required to be installed and established prior to the start of the 2009 wet season. If there are any questions or clarifications needed,please contact me. Ei:d of Report pF,tYA9 9� 0 5 SIONAI. �o to tTj�p j Q EXPIRES 08 10/0 1 Report'By:Trent A. Ward,PE 2709 JAHN AVE NW SUITE H-5 o GIG HARBOR.WA 98335+TEL(253)858-8577 a FAX(253)858-8579 LL r O O O O I� � lid O a � { f 2001 Page 1 �WA R I V EI� 1�AAsOr!COUNTY PUBLIC 1,(-v'0 s;s E/VG/VEER//VG C/lam/L ENGINEER/NG S PIANN/NG ENGINEER'S FIELD REPORT PROJECT: Hood Canal K-8 School FIELD 2 REPORT NO.: CONTRACTOR: Jones&Roberts(General) PROJECT NO.: 019064 SECO(Civil Sub-contractor) DATE: October 9,2007 WEATHER: Overcast TIME: 1:00 PM TEMP. 60 deg F+/- RANGE: Gary Larson,GALCo Engr. PRESENT AT Steve Brannon,Jones &Roberts SITE: Keith Tibbets, SECO John Sliva, Mason Cty PW DISCUSSION/OBSERVATION Onsite meeting with John Sliva, Mason County, Gary Larson, GALCo Engr., Steve Brannon, Jones & Roberts, and Keith Tibbets, SECO, to inspect the onsite stormwater wet-pond, infiltration pond and biofiltration swale. These facilities are not complete at this time. The wet pond liner is installed and the wet pond is full of storunvater, but the wet pond berm/gravel filter berm has not been constructed yet,the bottoms and side slopes of the pond facilities have not been seeded and no vegetation has been established, and the biofiltration swale has not been finish graded and properly vegetated. Given the j current wet weather conditions and given we are starting the wet season, it was agreed by all parties present that it is impractical to attempt to complete the wet pond berm construction and biofiltration construction at this time,and completion may be deferred until the dry season 2008. i John Sliva, Mason County, indicated that the County would accept the current, incomplete condition that the pond facilities and biofiltration facility are in with the provision that written temporary erosion & sediment control installation requirements (TESC) and maintenance requirements be provided to the County outlining the temporary measures to be put in place at this time in order to prevent wet season erosion and degradation of the facilities, until such time next year (2008) when these facilities are { completed, during the dry season. Therefore, the following is an outline of interim requirements the Contractor is required to perform, effectively immediately: I I (1) Apply temporary erosion control seed mix and minimum 2"-3" thickness of straw mulch to promote grass establishment,on all areas between access road and pond. Alternatively,apply seed mix and cover with plastic cover to promote grass establishment. (Note: mulch or plastic cover are required until 75% grass cover is established); Report By: Trent A. Ward, PE 2709 JAHN AVE NW SUITE H-5 9 GIG HARBOR,WA 98335•TEL(253)858-8577• FAX(253)858-8579 f I Paget i i (2) Apply temporary erosion control seed mix and tight-woven jute netting or matting on all pond side- slopes to promote grass establishment (Caution - care must be exercised when staking jute netting/matting so as to not puncture the PVC liner installed with the wet pond side slopes). Alternatively, apply seed mix and cover with plastic to promote grass establishment. (Note: jute nettinghnatting or plastic cover are required until 75%grass cover is established); (3) Install two rock check-dams,evenly spaced along the biofiltration swale bottom, perpendicular to the flow of water. Check dams are to be minimum 12" in height and constructed of crushed rock with slopes of 2:1 maximum; (4)Remove all sediment within infiltration pond and scarify bottom to restore infiltration function; Upon completion of initial installation of the above measures, the contractor shall maintain these measures throughout the wet season as follows: i (A) Inspect all measures on a weekly basis, and after all runoff-producing storm events between October I" and April 30' (inspect all measures on a monthly basis (minimum) and within 48 hours of a storm event, between May I"and September 30'".) (B) All mulched areas must have mulch added as required to maintain minimum cover thickness until grass cover is established. (C)Remove sediment from rock check daps when sediment height equals one-half the check dam height. (D) Remove sediment from infiltration pond facility immediately upon observing, and maintain a scarified pond bottom surface. The contractor is to exercise extra care when working within the infiltration pond so as to not compact the pond bottom and adversely affect its infiltration flnuction. (E)Maintain all pipe outfall protections,and remove sediment buildup as required. I i All pond and biofiltration swale facilities construction shall be completed, inspected and accepted, per I contract documents, within the dry season of 2008, and all permanent erosion and sediment control provisions will be required to be installed and established prior to the start of the 2008 wet season. 1 If there are any questions or clarifications needed, please contact me. End of Report WAS y� i •e 0 SIGNAL to t�o� i EXPIRES 08/10/o i Report By: Trent A. Ward, PE 2709 JAHN AVE NW SUITE H-5 9 GIG HARBOR,WA 98335 TEL(253)858-8577 FAX(253)858-8579 RECEIVE'D, ArAr', aL'E � � ��f Page 1 �A!�Ef�E/�/ t tk,S0N COUM PUBLIC WORKS GY✓/! ENG/KEEP/NG B PLANK/NG ENGINEER'S FIELD REPORT-ADDENDUM Hood Canal K-8 School FIELD 2 PROJECT: REPORT NO.: (Addendum) CONTRACTOR: Jones&Roberts(General) PROJECT NO.: 019064 SECO(Civil Sub-contractor) DATE: October 18,2007 WEATHER: -- TPAE: -- TEMP. -- RANGE: PRESENT AT SITE: DISCUSSION/OBSERVATION The following is an Addendum to Field Report#2,dated October 9, 2007: The contractor shall add the following interim temporary erosion and sediment control measure to field report#2,effective immediately: and the infiltration pond. Item 5 Install ri ra protection on the spillway between the wet pond a p O rip rap P If there are any questions or clarifications needed,please contact me. End of Report A . WAS o ��ISTE� C,ti SIGNAL c0 1q0? EXPIRES 08/10 O Report By: Trent A. 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