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HomeMy WebLinkAbout3.2 ITEM 3.2 TOWN OF LOS ALTOS HILLS April 7, 2016 Staff Report to the Planning Commission SUBJECT: REVIEW AND CONSIDERATION OF A PERMIT MODIFICATION AND ADDENDUM TO A MITIGATED NEGATIVE DECLARATION FOR BARRON CREEK RESTORATION PROJECT, 26170 AND 26240 FREMONT ROAD; FILE#89-16-PM FROM: Richard Chiu, City Engineer/Public Works Director Suzanne Avila, Planning Director SA RECOMMENDATION: That the Planning Commission: Recommend that the City Council approve the modification to the Site Development Peri it;acid Addendum to the Mitigated Negative Declaration for restoration:of a segment of Barron,Creek,located;between Q6170 and 26240 Fremont Road. BACKGROUND On March 14,'2012 theity'Council' approved a Variance to allow•hardscape'in the setback and fencing within'25'feet of a creek; and a Site Development Permit for the restoration of a section of Barroii Creek located between properties at 26170 and 26240 Fremont Road. The Council adopted a Mitigated Negative Declaration (MND) and Mitigation Monitoring Plan as part of the project approval. On July 19, 2012 the Planning Commission approved a modification to the permit and an Addendum to the MND. Thescope of the project changed only in the alignment of the creek channel and none of the adopted mitigation measures were affected. The applicant has since'reduced the scope of the project. A second Addendum to the MND has been prepared(see Attachment 1). DISCUSSION: The revised Barron Creek;restoration project includes the following objectives: 1. Recreate, a creek:channel.:with,geomorphic characteristics similar to other creeks in the area (low-flow channel, flood plain and bed slope to equilibrate sediment transport through the reach). 2. Increase the capacity,of thecreek to covey flood flows as high as the 100-year recurrence intervalstorm event. 3. Enhance the value of the creek where practicable. Vegetation that is removed will be replaced with plants from a more robust native plant palette. 4. Two small bridges will connect the two properties. 5. Culvert inlets and outfalls will be stabilized with rock rip-rap where erosion potential exists due to contraction and expansion. Staff Report to the Planning Commission Barron Creek Restoration April 7,2016 Page 2 of 2 The changes from the 2012 approved project are as follows: • The creek will stay in its exiting alignment (previously it was to be relocated 231/2 feet to the west). • Reduction in the number of tree removals above the top of bank (originally 21, now 13). • No fence setback variance required. • Paving within setbacks reduced from 780 to 480 square feet. • Two creek crossings instead of three (pedestrian bridges). • Elimination of a driveway connection between the two properties. The extent of potential impacts identified in 2012 has been reduced through project revisions. The project will still be subject to the mitigation measures identified for the original project design(see Exhibit 1 to the Addendum). CEQA REVIEW In conformance with CEQA requirements, an Initial Study and Mitigated Negative Declaration (MND) were prepared for the project. The MND was adopted by the City Council on March 14, 2012. An Addendum to the MND was approved by the Planning Commission on July 19, 2012. Addendum #2 has been prepared to describe the changes to the project and demonstrates that the reduced project scope will result in reductions to potentially significant impacts from the project. There are no changes to the adopted mitigation measures. ATTACHMENTS 1. Addendum to Mitigated Negative Declaration and Mitigation Measures (11 pages total) 2. Barron Creek restoration plans (nine sheets) ATTACHMENT 1 ADDENDUM TO THE MITIGATED NEGATIVE DECLARATION BARRON CREEK RESTORATION PROJECT 26170 FREMONT ROAD IN THE TOWN OF Los ALTOS HILLS Introduction This document is an Addendum that has been prepared to address changes in the Barron Creek Restoration project since approval of the Mitigated Negative Declaration (MND) for the project in 2012. Since the 2012 approval, the applicant has refined the project and submitted an application to amend the Town permits required, e.g. Heritage Tree Removal permit(s), etc., and for other related site improvements.The Town, as lead agency for the project under the California Environmental Quality Act (CEQA), has determined that the current project proposal differs sufficiently from the project evaluated in the MND and includes necessary minor technical changes that, in accordance with Section 15164 of the State CEQA Guidelines, warrant preparation of an addendum to the adopted MND as amended by Addendum#1 to the MND. The currently proposed CEQA Addendum (hereafter referred to as the"Addendum") is supported by the information and analysis contained in original Initial Study and MND for the project (approved March 14, 2012), the first Addendum to the MND approved on July 19, 2012, the "Technical Basis of Design Report for the Barron Creek Restoration"plan by ENGEO, Inc. dated October 30, 2015, and the updated "Barron Creek Restoration Biological Evaluation, Town of Los Altos Hills, California"dated December 1,2015. Once a project or program EIR has been certified or a Negative Declaration adopted for a project, a subsequent EIR or Negative Declaration may be prepared if there is substantial evidence that there are substantial changes to the project or the project circumstances as outlined pursuant to Sections 15162 of the State CEQA Guidelines. Pursuant to State CEQA Guidelines Section 15164, an addendum may be prepared if"some changes or additions are necessary but none of the conditions described in Section 15162 calling for preparation of a subsequent EIR have occurred." As noted above, the Town has determined that the minor project changes do not require a subsequent EIR or negative declaration under State CEQA Guidelines Section 15162, and the Town has further determined that the previously prepared original Mitigated Negative Declaration(MND) and the revised project proposal as amended under Addendum#1 adequately incorporates habitat restoration, water quality improvement measures, and best management practices (BMPs) during construction to address the potential environmental impacts of the proposed project. Background Mitigated Negative Declaration means all potential adverse environmental impacts, which could be caused by the project, can be brought to a less than significant level with the implementation of mitigation measures. On March 1,2012,the Planning Commission recommended approval of the project and on March 14, 2012 the City Council approved the Barron Creek restoration and relocation project along with associated variances and fence exceptions.The project evaluated by the Initial Study and the subject of the Mitigated Negative Declaration proposed to re-align the creek channel to the west of its current location, involving extensive excavation and grading along with filling of the ADDENDUM TO THE MITIGATED NEGATIVE DECLARATION BARRON CREEK RESTORATION PROJECT current channel. In addition, a technical study prepared by Live Oak Associates (LOA) in support of the Initial Study examined the potential loss of vegetation and habitat in the project area and attendant effects of the project on other biological resources at the subject property. Site studies recognized that the existing creek channel has historically been modified from its original location and has been constructed with man-made materials. The existing channel is lined with rip-rap that is significantly overgrown with non-native vegetation. The Town unanimously approved the proposed project adopted the Mitigated Negative Declaration and approved the three requested site development permits for flood control and realignment project based on the environmental document and subject to the conditions of approval and mitigation measures as shown in the initial study, including the modifications revising Conditions of Approval, and approval of a requested variance to locate three, eight-foot wide bridges and hardscape paths within the 30-foot property line setback based on the fmdings. After the Town Council approved the project on March 14, 2012, the applicant began the site planning studies for two properties adjoining Barron Creek to the west and discovered that site design needs for those two properties would be better suited to a wider building envelope. Therefore, the applicant requested to move the creek 16.5 feet back towards the east(towards its original and existing location) to gain a wider building envelope. The project remained the same in most every other aspect. An Addendum (#1) was prepared for the proposed changes to the project design and reviewed by the Planning Commission. The Planning Commission was the fmal acting authority on the modification because no increased environmental effects were identified by the biological consultant, LOA, in a letter dated July 5, 2012. The letter from LOA indicated that no new impacts to trees and wetland vegetation would occur as a result of the proposed project changes addressed by Addendum#1. Town staff reviewed the revised project's potential for significant environmental impacts to other resources as required by CEQA and determined that the revised project would not have additional potentially significant effects nor any increases in the severity of the significant impacts originally identified by the IS/MND. With the progression of site planning for the Barron Creek Restoration project, the applicant has become aware of project design changes that would further reduce the potential impacts of the project on the environmental resources associated with Barron Creek. In particular, the applicant retained an engineering firm, ENGEO, Inc.,that proposed a new creek channel design to increase the stability and biological function in the creek channel, meeting the multiple objectives of the project and regulatory agencies involved in the approval process for the restoration of Barron Creek. The revised Barron Creek Restoration project design that is the subject of this Addendum (#2) includes the following objectives: 1. Recreate, to the maximum extent, a creek channel with geomorphic characteristics similar to other creeks in the area with a low-flow channel, flood plain, and bed slope in order to equilibrate sediment transport through the reach. 2. Increase the capacity of the creek as necessary to convey flood flows as high as the 100- year recurrence interval storm event. 3. Enhance the habitat values of the creek where practicable. For this reach of creek, the removal and replanting of vegetation will be required after much of the rock rip-rap placed in the channel is removed. Plants will be replaced with a more robust and appropriate native plant palette. Ultimately, the root architecture of the plant species will provide protection against excessive erosion. JANUARY 12,2016 2 ADDENDUM TO THE MITIGATED NEGATIVE DECLARATION BARRON CREEK RESTORATION PROJECT 4. Two new small bridges will cross the creek to connect the Red and Blue Orchid parcels (merged and under one address at 26240 Fremont Road) and the Shalimar property. 5. Culvert inlets and outfalls will be stabilized with rock rip-rap where erosion potential exist due to contraction and expansion. The focus of the revised project design is to restore Barron Creek to conditions that maximize its habitat values while achieving physical conditions that accommodate flood flows and stabilize channel conditions that prevent on-site erosion and enhance downstream water quality. Analysis of Proposed Revisions in Relation to CEQA Guidelines and the Adopted Mitigated Negative Declaration The 2012 Initial Study and project review did not anticipate alteration to the stream bank and removal of the three adjacent oak trees. The affected oaks are 7 to 11-inch diameters and would not qualify as Heritage Trees in the Town of Los Altos Hills. The proposed tree removal, creek bank stabilization, and site drainage improvements would be implemented using Best Management Practices (BMPs) and other bioengineering methods, as indicated in the 2012 Mitigated Negative Declaration and the first Addendum.However,the extent of potential impacts from the project has been diminished through project revisions since 2012. The current project proposal has been modified from the original proposal as follows: Project Design Original First Current Project Addendum Addendum Creek Relocation Move creek 40 Move creek 23.5 Leave creek in feet to the west feet to the west existing alignment Tree Removal Below Top of Bank 42 trees 42 trees 42 trees Above Top of Bank 21 trees 17 trees 13 trees Temporary Wetlands 0.12 acre 0.12 acre 0.12 acre Disturbance Rip-rap Removal 820 tons 820 tons 820 tons Soil Import(Cubic Yards) 130 CY 165 CY 140 CY Fence Setback 15 feet on east 15 feet on east No fence setback side of creek side of creek variance required Variance for Paving 780 s.f. 719 s.f. 480 s.f. in Setback(Square Feet) Number of Bridges 3 3 2 As indicated in the above comparative table, the currently proposed project would reduce the scale of various project elements from those proposed by the original project design and under the previous Addendum(#1).The reduction of project scale would result in corresponding reductions JANUARY 12,2016 3 ADDENDUM TO THE MITIGATED NEGATIVE DECLARATION BARRON CREEK RESTORATION PROJECT in potentially significant environmental impacts from the project, as described in the Initial Study and Mitigated Negative Declaration,and first Addendum prepared for the originally proposed and revised projects.While correlating reduction in mitigation may be feasible,the currently proposed project would be subject to all of the Mitigation Measures identified by the IS and MND for the original project design.Those Mitigation Measures are listed as follows: 1. Aesthetic Measure 1 2. Air Quality Measure 1 3. Biologic Resource Measures 1 and 2 4. Cultural Resource Measure 1 5. Hydrology and Water Quality Measure 1 6. Land Use and Planning Measures 1 and 2 7. Noise Measure 1 The full text of these Mitigation Measures are included in this Addendum as Exhibit 1. It should be noted that the currently proposed project would preclude certain biological resource impacts such as potentially significant impacts to bats and one avian species, the white- tailed kite (Elanus leucurus), as indicated in the updated Biological Evaluation (LOA, 2015). No Subsequent Review Required per State CEQA Guidelines Section 15162. State CEQA Guidelines Section 15162 identifies the conditions requiring subsequent environmental review. If, after certification of a Mitigated Negative Declaration, altered conditions or changes or additions to a project occur, CEQA provides three mechanisms to address these changes: a subsequent EIR, a supplement to an EIR,and an addendum to an EIR. Section 15162 of the State CEQA Guidelines describes the conditions under which a subsequent EIR would be prepared. In summary,when an EIR has been certified for a project, no subsequent EIR shall be prepared for that project unless the lead agency determines, on the basis of substantial evidence in light of the whole record,one or more of the following: (1) Substantial changes are proposed in the project which will require major revisions of the previous EIR/ND due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) Substantial changes occur with respect to the circumstances under which the project is undertaken which will require major revisions of the previous EIR/ND due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified significant effects; or (3)New information of substantial importance,which was not known and could not have been known with the exercise of reasonable diligence at the time the previous EIR/ND was certified as complete, shows any of the following: (A) The project will have one or more significant effects not discussed in the previous EIR/ND; (B) Significant effects previously examined will be substantially more severe than shown in the previous EIR/ND; JANUARY 12,2016 4 ADDENDUM TO THE MITIGATED NEGATIVE DECLARATION BARRON CREEK RESTORATION PROJECT (C)Mitigation measures or alternatives previously found not to be feasible would in fact be feasible, and would substantially reduce one or more significant effects of the project, but the project proponents decline to adopt the mitigation measures or alternatives; or (D) Mitigation measures or alternatives which are considerably different from those analyzed in the previous EIR/ND would substantially reduce one or more significant effects on the environment, but the project proponents decline to adopt the mitigation measure or alternative. Section 15164 of the State CEQA Guidelines states that a lead agency may prepare an addendum to a previously adopted Mitigated Negative Declaration if some changes or additions are necessary but none of the conditions described above for Section 15162 calling for preparation of an EIR or Negative Declaration have occurred. After a review of these conditions, the Town has determined that no subsequent EIR or negative declaration is required for this project.This is based on the following analysis: a) Are there substantial changes to the project involving new or more severe significant impacts? The proposed project has not substantially changed and will result in less on-site building improvements than previously proposed. The retention of the creek's current alignment and the reduction in: 1) temporary wetlands disturbance, 2) soil import, 3) paving in setback area, and 4) number of bridges will result in fewer potentially significant impacts and/or reduce the severity of potentially significant impacts as identified in the Initial Study. Remaining impacts will be mitigated as required under the adopted Mitigation Measures listed above and detailed in Attachment 1. The proposed stream bank stabilization and creek restoration will improve habitat and water quality in the creek area. These project changes will not involve new or more severe significant impacts than previously identified and will be subject to all previously adopted mitigation measures. b) Are there substantial changes in the conditions under which the project is undertaken involving new or more severe significant impacts? There are no substantial changes in the conditions assumed in the previously adopted MND. All project changes are designed to improve habitat and water quality. c) Is there new information of substantial importance, which was not known and could not have been known at the time of the previous EIR that shows the project will have a significant effect not addressed in the previous EIR; or previous effects are more severe; or, previously infeasible mitigation measures are now feasible but the applicant declined to adopt them; or mitigation measures considerably different from those in the previous EIR would substantially reduce significant effects but the applicant declines to adopt them? There is no new information that indicates that new or more severe significant effects would occur and there are no new mitigation measures required. The applicant's plans for the Barron Creek Restoration will be consistent with the mitigation measures previously adopted. JANUARY 12,2016 5 ADDENDUM TO THE MITIGATED NEGATIVE DECLARATION BARRON CREEK RESTORATION PROJECT d) If no subsequent EIR-level review is required, should a subsequent negative declaration be prepared? No subsequent negative declaration or mitigated negative declaration is required because there are no significant or potentially significant impacts of the project beyond those previously identified in the MND. No new or revised mitigation measures would be required to reduce the environmental impacts of the project. Conclusion This Addendum is adopted pursuant to State CEQA Guidelines Section 15164 based on the application materials for the proposed creek stabilization and restoration improvements as discussed above. Through the adoption of this Addendum, the Town determines that the above project changes do not require a subsequent EIR or negative declaration under State CEQA Guidelines Section 15162. The Town further determines that the MND and this Addendum adequately address the potential environmental impacts of the proposed project. As provided in Section 15164 of the State CEQA Guidelines, the addendum need not be circulated for public review, but shall be considered with the prior environmental documents before making a decision on this project. The adopted IS/MND and related Addendum are available for public review at the Town of Los Altos Hills Planning and Building Department, 26379 Fremont Road, Los Altos Hills, CA. The documents are also available for review on the Town's Web site: http://www.losaltoshills.ca.gov/. JANUARY 12,2016 6 EXHIBIT 1 MITIGATION MEASURES REQUIRED BY INITIAL STUDY AND MITIGATED NEGATIVE DECLARATION FOR BARRON CREEK REALIGNMENT PROJECT MARCH 14,2012 Barron Creek Channel Flood Control and Realignment Project Initial Study January 26,2012 Page 33 of 47 NIITIGATION MEASURES INCLUDED IN THE PROJECT TO AVOID POTENTIALLY SIGNIFICANT EFFECTS: Aesthetic Measure 1: A revegetation plan shall be prepared and implemented to compensate for the loss of approximately forty-two willow trees and 21 other various trees required for removal due to the new driveway and pathways. . For trees occurring within the riparian habitat of Barron Creek which are being removed, a minimum 1:1 replacement-to-removal ratio along the upper banks of the same reach of the creek where the willows are being removed is required. For the trees being removed outside of the riparian habitat a minimum of 2:1 replacement-to-removal ratio shall be used. For all trees located near the construction, tree protection measures shall be installed around the drip-line prior to construction and throughout the construction phase of the project. Biologic Resource Measure 1: Trees and other structures (i.e.,birdhouses)planned for removal shall be removed during the non-breeding season(September 1 through January 31). If it is not possible to avoid tree removal during the breeding season(February 1 through August 31),a qualified biologist shall conduct a pre-disturbance survey for tree-nesting raptors and migratory birds in all trees and other structures planned for removal and immediately adjacent to the disturbance zone no more than 30 days from the onset of the removal activities,if such disturbance will occur during the breeding season. If nesting raptors and migratory birds are detected on the site during the survey,a suitable activity-free buffer shall be established around all active nests. The precise dimension of the buffer(up to 250 feet)would be determined at that time and may vary depending on location and species.Buffers shall remain in place for the duration of the breeding season or until it has been confirmed by a qualified biologist that all chicks have fledged and are independent of their parents. Pre-disturbance surveys during the non-breeding season are not necessary for tree-nesting raptors and migratory birds, as they are expected to abandon their roosts during disturbance activities. Implementation of the above measure would mitigate impacts to tree-nesting raptors and migratory birds to a less-than-significant leveL Biologic Resource Measure 2: A qualified biologist shall conduct a pre-construction survey of the bat boxes for bats within 30 days prior to the onset of ground disturbance,if such disturbance will occur during • the roosting season(March 1.through August 31).If active maternity roosts are detected during the survey, then a construction-free buffer shall be established around all active roosts. The buffer radius would be established at the time work is to be carried out and would be determined by the extent and duration of construction activities scheduled to occur as well as the location of any roosts at that time. An onsite biological monitor would be necessary during construction when construction activities would be performed near these features during the roosting season. The monitor would have authority to issue a cease and desist order if construction activities disturb any bat roosts. If demolition of the bat boxes is to occur,then pre-demolition bat surveys shall be conducted to determine if special status bat species are present. If no bats are observed to be roosting in the boxes,then no further action would be required, and dismantling of the boxes can proceed. However, if bats are found to be roosting on the site,the project proponents shall exclude bats prior to dismantling to ensure no harm or take would occur to any special status bats as a result of demolition activities. Dismantling of the boxes shall occur after August 31 and before March 1 to avoid interfering with an active nursery.If a non-breeding bat colony is found in the boxes, the individuals shall be safely evicted under the direction of a qualified bat biologist through a `partial dismantle" process, whereby the roosting area is opened to allow air flow through and sunlight into the structure,making it unsuitable habitat and undesirable for the bats to return to the site.Full dismantling shall then follow no later than the following day(i.e.,there shall be no less than one night between initial disturbance for airflow and the demolition). This action shall allow bats to leave during the night,thus increasing their chances of finding new roosts with a minimum of potential predation during daylight hours. Barron Creek Channel Flood Control and Realignment Project Initial Study January 26,2012 Page 34 of 47 Biologic Resource Measure 3: Due to the nature of the proposed project activities, full avoidance of jurisdictional waters and sensitive habitats on the site is not possible.Therefore,the project proponent shall implement minimization and compensation measures to reduce impacts to jurisdictional waters and sensitive habitats to a less-than-significant level Minimization.Because full avoidance is not possible,actions shall be taken to minimi,'e impacts to aquatic and riparian habitats. Measures taken during construction activities shall include placing construction fencing around the aquatic features or riparian areas to be preserved to ensure that construction activities do not inadvertently impact these areas. Any proposed future lighting on the property(e.g., footpath lighting) shall be designed to minimize light and glare impacts to the riparian corridor. To the maximum extent practicable,light sources shall not be visible from riparian areas and shall not illuminate riparian areas or cause glare on the opposite side of the channel(e.g.,to neighboring properties).Additionally,with the exception of the willows to be removed at the upstream end of the channel,proposed realignment activities shall be designed and situated to avoid the loss of trees within and adjacent to the channel to the maximum extent practicable. The Town's creek protection ordinance requires all structures to be set back a minimum of 25 ft.from the top of bank of all creeks.The existing Wadhwani estate fence is located within approximately 10 ft.of the top of bank along the east side of the channel.The proposed revegetation for the channel realignment will provide increased riparian habitat function and value over the channel's existing condition. Therefore, rather than conforming strictly with the Town's creek protection ordinance, the new estate fence shall be set back in a manner that accommodates the intended function and value of the channel revegetation plan. This includes a minimum setback of 15 ft. from the center'of any planted riparian trees or 15 IL from the top of bank of the realigned channel,whichever is greater. Compensation. An onsite revegetation plan has been developed to compensate for temporary impacts to 0.12 acres of wetlands occurring within the channel and the loss of the approximately forty-two willows and other riparian trees.A formal tree survey shall be completed to determine the actual number of trees to be removed. It is expected that all compensation measures can be accommodated within the proposed channel alignment, as the channel is proposed to be planted with native wetland vegetation. If the new channel alignment cannot fully accommodate the compensation measures,then offsite restoration would be necessary.Compensation measures shall include: • Creation of at least 0.12 acres of wetlands within the channel. Replacement of all willows removed from anywhere below the top of bank alongthe existing channel alignment at a minimum 1:1 replacement-to-removal ratio. Replacement of the nineteen willows removed from the upstream end of the channel shall occur along the upper banks of this same reach of the creek. The willows occurring in the creek were originally planted as pole cuttings and occurred as natural recruits.Because they have become a nuisance by obstructing the flow of water through the channel, the Town has indicated its desire to have these trees removed. Therefore,the recommended replacement-to-removal ratio for willow impacts as described above was developed with the Town and through informal conversations with the USACE and CDFG (Paula Gill, pers. comm., February 2011; Dave Johnston, pers. comm., February 2011). This mitigation is consistent with the requirements of these regulatory agencies. To the maximum extent practicable,removed trees shall be replaced with like species.Due to the flow obstructions created by the existing willows and the project's objective to prevent future obstructions, other riparian tree species(e.g., coast live oaks and California sycamores) may be substituted in consultation with a qualified biologist. • Replacement of all other native riparian trees(i.e.,riparian trees occurring beyond the top of bank) at a minimum 2:1 replacement-to-removal ratio as agreed upon with USACE and CDFG. To the maximum extent practicable,removed trees shall be replaced with like species. • Reseeding or replanting of riparian or wetland vegetation(i.e.,a combination of trees, shrubs,and herbaceous vegetation)along the channel benches and banks. • Barron Creek Channel Flood Control and Realignment Project Initial Study January 26,2012 Page 35 of 47 These measures shall be implemented according to a site-specific revegetation plan that would be prepared for agency review. This mitigation plan would need to be approved by the responsible agency prior to the start of project activities.The revegetation plan shall: 1. Designate suitable replanting areas. 2. Describe the methods by which the revegetation will occur, including species to be planted and plant installation guidelines. 3. Develop a timetable for implementation of the plan. 4. Outline a monitoring methodology and establish appropriate performance criteria. 5. Describe remedial measures to be performed in the event that initial revegetation measures are unsuccessful in meeting the performance criteria. 6. Describe site maintenance activities to follow revegetation activities. These may include weed control,irrigation,and control of herbivory. Compliance with Regulatory Agency Requirements. The applicant shall also comply with all state and federal regulations related to work that will impact jurisdictional waters occurring on the site, which includes Barron Creek and may also include the wetland patch abutting the creek,should it be regulated by the agencies. This may require obtaining a Section 404 Clean Water Act permit from the USACE,Section 401 Water Quality Certification from the RWQCB,and Section 1600 Stream Alteration Agreement from the CDFG prior to initiating any realignment and maintenance activities, if deemed necessary. Permit conditions typically require a mitigation plan outlining compensatory measures for impacts to all jurisdictional features. A small amount of additional mitigation may be required by the agencies for impacts to the abutting wetland in order to comply with their permit conditions. It is expected that the agencies would seek mitigation in the form of onsite wetland creation or enhancement. The project proposes to plant the channel of the new alignment with wetland vegetation.This would accommodate both temporary impacts to wetlands occurring within the existing channel and permanent impacts to the wetland patch abutting the creek. Biologic Resource Measure 4: For mitigation measures related to the removal of trees within the riparian habitat of Barron Creek,refer to Biologic Resource Measure 3.The following measures are recommended for trees occurring outside of the riparian habitat. Tree removal shall occur pursuant to relevant Town ordinances, including securing a tree removal permit and complying with the permit conditions. All trees to be removed shall be replaced onsite at a minimum 2:1 replacement-to-removal'ratio (two trees planted for each tree removed). A monitoring plan for the replacement trees shall be developed and submitted to the Town during the permit process. The basic components of the monitoring plan shall consist of final success criteria, specific performance criteria, monitoring methods, data analysis, monitoring schedule, contingency/remedial measures, and reporting requirements. For trees to be retained, impacts to any retained trees during the construction and operation phases of the project can be reduced to a less-than-significant level by conforming to the following guidelines. These measures shall remain in place for the duration of construction activities at the project site: • The project proponent shall retain a consulting arborist prior to any ground disturbance activities. The consulting arborist would develop a tree-protection plan outlining specific procedures to ensure that retained trees are protected during the construction phase. • Prior to any ground disturbance activities, fencing shall be installed around the drip-line of all retained trees occurring within the development envelope, and the fencing shall remain in place throughout the construction phase of the project.The type of fencing to be utilized would be at the direction of the consulting arborist. • Any limb or root pruning to be conducted on retained trees shall be approved and supervised by the consulting arborist and shall follow best management practices developed by the International Society of Arboriculture. • Supplemental irrigation to retained trees shall be applied as determined by the consulting arborist. Barron Creek Channel Flood Control and Realignment Project Initial Study Jannary 26,2012 Page 36 of 47 • If any of the retained trees are damaged during the construction phase,they shall be evaluated at the earliest possible time by the consulting arborist so that appropriate measures can be identified and implemented by the applicant. Cultural Resource Measure 1: Upon discovering or unearthing any possible burial site as evidenced by human skeletal remains or artifacts,the person making such discovery shall immediately notify the County of Santa Clara Coroner and no further disturbance of the site may be made except as authorized by the County Coordinator of Indian Affairs. Hydrology and Water Quality Measure 1: The new creek channel and bridges shall be designed and constructed to meet the 100 year flood event. Land Use and Planning Measure 1: The Planning Commission shall review and approve the proposed new common driveway which crosses from the existing driveway on the Wadhwani property(26170 W. Fremont Road) onto the Red Orchid Property(26238 W.Fremont Road). An easement chall be recorded on the Red Orchid property allowing the ingress-egress and stipulating that no other driveway access will be granted on this property. Land Use and Planning Measure 2: A variance must be obtained from the Planning Commission to allow walkways and bridges greater than 4 feet wide to be located within the property line setbacks on the Wadhwani property(26170 W.Fremont Road),Red Orchid property(26238 W. Fremont Road) and Blue Orchid property(26240 W.Fremont Road). If the variance is not granted then the walkways and bridges must be reduced to no greater than 4 feet wide. Noise Measure 1: Noise generating construction activities shall be limited to Monday through Saturday between the hours of 8:00 am and 5:30 pm. No heavy noise generating equipment is allowed to be used on Saturdays and no construction is allowed on Sundays or holidays as noted per Chapter 7,Sec.5-7-01 of the Los Altos Hills Municipal Code. 1 7.41, 4 Lk`� , fi ^ . . BARRON CREEK RESTORATION L � '�{ )._.5-.,1);,1:6� ', �W,I41-1-1141-, ' `'^� LOS ALTOS HILLS, CALIFORNIA �� it' ; \--,,,54s,6, ', ,,_-3-STIR s1"' J{ ]{,.,ilm� �`� 1 �,7 J.-1-,,,,,..., '�—I-' +; BENCHMARK STATEMENT SHEET INDEX C ,.J ..,-,,,,,,,,,k,.�.g / L ` .1 L. TOWN OF LOS ALTOS WITS BENCHMARK 23R(ELEVATION 207.70 NAV088)IS SHEET ,1.;,;..r.,` -1yR' }1 La ) ,t,' y�� \ 1-0� -`-L. REFERENCED FOR ALL VERTICAL DATUM SEE CML NOTESSHEET 2FOR NUMBER 10000 \ V p Y� DESCRIPTION f '���/ !,.V.,;;;,. /.4:‘,:-'41.,:% 1 J �F [ {`+Ly }Ok a '77�T 1 COVER SHEET � � ( �\ �(r 1 �'\` % fr \ � � 2 GENERAL NOTES } / J1:/ .,-,1-;:1,''',.' �' -`," 4 3 DEMOLITION PLAN C ' I'L—, 1 d_ (J '-''�(l ..'� 1 I�`3r 4 GRADING PUN '1, 'ri`^ V 1 1 /T ^\��<�^/'��I (((�/ }.2'1'1, �' ` �T` S EROSION CONTROL PUN ' 1� ' V �. ` 4 TS AL7'O�� 7 1 !le 1/� ` 1\ 44 S EROSION CONTROL DETAILS j 4o utbB^ '' ,� 1' �i A? , '% 7 EROSION CONTROL FABRIC CHANNEL DETALS t / ^ TRP.1 TREE REMOVAL PUN Oft `u` \ Y�=1' '_ \.„ CRP.1 CONCEPTUAL REVE8ETAPON PIAN VICINITY MAP SCALE:I'c 2000 ! 1 II i mm° IMB�R A'4.1:1:1) ' `��``., -\ PASTING PEDESTRIAN BRIDGE (11�I� l"-\ J �� ���� 711 %k .�- � p LIMIT OF GRADING CONFO' i . TO EXISTING GRADE I _ s BRIDGE \1� _ fl • --Ln_ ROPD3ED PEDfiS'IAN BRIDGE 1 IIS^_^ /PROPOSEDPEDESTRIAN BRIDGE,--____ - �I ij \ �_ ' Ni ��•- n _ , \ �[mo �1 _ - FEB Z .7016- _ _ 1 ` — -- =T_____ i 7. '7` j SITE PLAN • SCALE I'=40' I • I I PRELIMINARY NOT FOR CONSTRUCTION 10W110WGMWIRAfE 000700 R:SC COVER SHEET SHEET NUMBER ENGEO � N.�I 1 IA4 AAMOILCAIPoR2AYW OROR➢R:IB BARRON CREEK RESTORATION TA%(Mq F®To1S OpROJECT NO AEY. PATE 000000710N BT xn ...Ho. ""^�'�`O m• AS�SHONt1 LOS ALTOS HILLS.CALIFORNIA 13082.000.000 • AOSMOCILEEM TOWN NOTES R.sro15 I MOBPRATION 1. ALL WORN SILL BE PFRPORNED I.CONFBRNANCEWITH THE TOILWORN I.ASA PART OF RECONSTRUCTION OF MESE FACILITIES.1E CONTRACTOR WU.BE 1 UBSTA...EFFORTS PAVE BEEN EMENDED TOACCOMMODATE ALL I. GENTFAL MODnPATION • TO PROVIDE OLE. ,INSTALL=LUZ.FENCNOPROWDEA MATER4180N1wB OR TIE IMMEDIATELY MACE. SECTIONS OF MC STATE OPGLagtIAOEPARTMEM OF TRANSPORTATION STANDARD SPECS-CAPONS. TIEEP OECTONRICESBUNE TREES FOR CONSTRUCTOR ONPRSMCMC¢0WIIPLEST NOOFFMA IS EISECTEO.MOULD MATERIALS. CONDUCTOR 6RLLL BERESPONSDIC TO SUBMIT NO ADMRETO APROJECT A LATEST EDSION,HEREINAFTER REFERREDTO AS rALTR., ES TO PROTECT UPPER WACHVAMPEBWICE CANNEL FROM CONSTRUCTION DEBRIS REMAIN MINE COILEIION OF IPE WON( SCHEDULE TINTKW RHDEED TO ACCOMMODATE BIG00OAMADAJMMENTST. _ SOILS, THE CONDUCTOR AND UE TO EMARONMPNTAL ORHEOUUTORY B.T OF LOS ALTOS RILLS STANDARD SPEC:PC.0 RM DETAILS F.PUBLIC WOWS CONSTRUCTION.MIME THECREEK S1DEGLOPET,PROVDEOEOFAMIC COVER FOR DIMMED SWILL BEECCOOME THEPROPEMYOFMECUOTRACTO. REQUIRFN0NTS CONTMCTgi SIAL RAN ON PROFEDNGWITN THE SITE APR6ASIE INSTALL RANTING,INSTALL EROSION CONTROL SFIDwOPVOVDE CONTRACTOR SILL THEN UNE PRONSIONSTNATAM SIM( SUCH AUANER AS TO BE MDT°MDERDE ANUOEM®LJE - IRRIGATION.AND OTHER MISCELLANEOUS SRTEWORK DESCRIBED.THEAND ALL REMAINING DEBRIS IS TOSE REMOVED FROMTLIE .. Wim0M ADDITIONAL COMPENSATION MONTLE TOW/1URCT C.AAS,DETAILS,AND MCDAM SPECIFICATIONS ARROGATED WITXTHESE CONSTRUCTOR DOCUMENTS CONSTRUCTION OCCIDENT& WORK SITED,'THE CONTRACTOR AND DISPOSED OF OFFIDDE NA ' BnATION D.STANDARDS OF ME TUNITED STATES DEPARTMENT OF USSR OCCUPATIONAL SAFETY AND IffAL1NADLmaMTpN2 41 ..RCE PYLpuDAYTNPPMaI UWFN.MNaIIR. 2 LANDSCAPE N00 OP STANDARDS AND RICES OF THE STATE DIVISION OF INDUSTRIAL SAFETY. FRIDAY WON NO CONSTRUCTION OR PICKUPS OR DEMMER WINO RAMAT INE2 CONTRACTOR SHALL ONLY STOCKPILE CLEW EXCESS MATERIAL AT CONTACTOR UNDERSTANDS VAT LANDSCAPEACTIVMES MAY NOT NES: TOLLOWO TODESIGNATED STOCKPILE SITES ANYEMCESS MATER.CONTAINING OW COUPLETS..OP THE CONSTRUCTION ACTIVITIES NO 1 COMPACTOR SHALL SUPPLY ALL EwPUENT,LASORAND INTERNS NECESSVti TOPHSORU THE WORK SHOW/.THESE OftEfMS°.ORGANIC OR OTHER UNUSABLE MATERIAL SILL BE /DDITDRL ALLOWANCE YELL BE GIVEN FORUNOSCAFELNeMATpM RADS. ABEFORE SMALL CR AFTER 6.90 P.M MONDAYDOM/PM FRIDAY CONSIDERED PART OF MATERIAL TO BE REMOVED MOODIE SITEAD 1 TE WALL BE TE RESPONSIBILITY OF TVARIOUS COMPACTORS TO COORDINATETI4R7WORK SOPS TO EMANATE CONFLICTS B.SATURDAYS OR SUNDAYS SHALL DEDISPOSED WAUWFMADTaELY WINNER AND WORK TOWARD THE OMER.COCOA.COLFIETIXI CP TM ENTIRE PROJECT. PRIOR.PLACING EXCESSµTEN.,THEIR Aro RECFNETNE A TIE CONTRACTOR SILL BS MERINO AND QUALITY DESCREED MITRE C.JARWRYI(MW YEARS DAY) SOILSMALLBE STRIPPED OFANYDELETER0000a0SUNLESSANIC LISONSIRUCTDN BOPS SPECIv PICADDN 1110 RIFEST GINewuD SWASSO .ME SHALL BE MST CUSS NHROWXWT.MTIERMULACORWORONOR S/CP. AYMNf MINE TOWN O.]O MDNDAYdJANIAM BY11.CORTARSENGAR TO PREVENT MOON CONSTRICTION EXPUNGE MALL PF1EVETECOAPACT.OFRESPoxSOIIrtYF.fALLTYINTENALe.WONOWN9P. 0.01 TO ANY WATER DOOR TAUZI. FR090NOP •I. B. LATHE EVEMOFANYCaNNCT OFNFOPMAT.BROWN ONMESE RAMS.NIYCOTLICTBEIWFFNIHESEPAV9AOTHE E.]RD MONDAYWFFBRVARY TWT LATERAL TO AM WATERCOURSE 00.FACILTIEI YARITARLI PRINT OP A CONESTENTAND PUNCPO AL PRODUCT.TILE CONTRACTOR DIP. WOmYPC FNGNEFR NWRIRNOCHOIC IN F.LAST MONDAY dµv CO STEEIRNUCTION LEOPH CCESS TO CTOIRAT00 DURATION..OF WOIRO.SITED UPON lE6ALLBEUEEpTDAILOw NOTICE.TRTPE ENGINEER SHALL RESOLVE THEASPS =BEL TXE ISSL1ANLP OF AWITEN ORDER REVISED PLANS OR BOM THE III EROSION CONTRM OwNET ECT.AU.FENCING SRL.BE REMW®10T9 .SHALL BEAR FULL COST APO RESPONSIBILITY FOR WORNAFELTED BY SIMI CONFLICTS AND PERFORMED BY 0.NLYM(INDEPENDENCE OAn - • COMPLETION OF PROJECT. CONTRACTOR PRIOR TO SVC.NOTICETO THE EHGwEFRAND ISSUANCE OF SUCH ORDER ARDOR REVISED PUNS I ONGINAC.DTI.UMES9%APPPOVEDBYTMEONUER 8 CR CHANGES APIECE P1.5!WTN.f WRRIENAPPROVAL OPTIEFNGPlEER6HALBEATMECON T0000TTi IL DBT NCH UT N 6EPTEIMER(.1301:10.1OEOfCASICTOBEGEOCO.ILIO ORMPPWEDEOUAI OWN RISK LNOVEUBER II(VEIFILVl6DAn BEDG OTE ANCHBRINO OF THEREOF..SHALL BE DONE BYLINE.THE 2 COFFEROAN ANO BYPASS TOM OFA I]-(410/11ME BY I2-DIM DEEP DIEN.MITRE CONTRACTORCOANDS THAT COFFER CANARD BYPASSRRAOO WILLTAB T. COMPACTOR WW1 PROVIDE ADEQUATE DIM COTROLATALL TRO. ARM THURSDAY N MOVENOERRI.NKSOIVOM DM) JUC,FILLING MEMEN.MOM.]RBIX(PACLTMN9 BE REQUIRED MEM/101M CAIRN CMSITES.AND TATNOTEIE SPECIFICATIONSSTANDARD SECTION IIA TIENFOLDINH AND STAGINGS WIT(.EACH SITE NAY BE NECESSARY TOACCO MOATEME S CONTRACTORW EXERCISE ALL NECESSARY CAUTION TO AVOID DAMAGE TO ANYEOM°TREES.OR SURFACE K DECEMBER ES(CIMISTMAS DM) • OVERLAPPING THEACONBNAL FABRIC IYPOST TRENCH CUT. GINNER ROWSAND SITE WORN.NO ADDTION4ALOWANCEWLLL BE TO AMP EXISTING DRAINAGE STRUCTURE,WATER BTRUCRaq SEWER OEWOTTe,MA0WF9.CR A.CTMM ATOCEOC FABRIC MULL BE SECURED THROWN WIDSUPNO .LIDDED OR YN. COHDPI.CT AOV®TATSTACMNNEL IN I BOXES FOR UNDERGROUND ELECTRIC.OAS,TLEPICNE CABLE PC STORK 6ATARY,WATER OR OTHER DfMIESWNEH ARE AMTOWN HOLEAYe S Oµ9 CAN VARY MRW.dTANNOR PACO EVFNW RAGE ARORLlBEAR NLLRBPoNMBWPfONANYDAdUDEINFIRETO. ROWS EKFFl PRECIPITATION.LOCAL RUN.MD GROUNDWATER } R. CONTRACTOR SHILL POST EMERGENCY TELEPHONE MIMERS FOR POLICE,Pok 80CSJANCE,AO0I06EAGENCR9 It/N]'OAYS.TPNE9 xOTFDBVFNGIEA IOVNATE0WO EASUREOWS THE E CONTRACTORS w SPONSOO ITOMAIPASZ MAIN°THTAIN PI eF I RESPONSIBLE TOR MN ITENANCE OF UTILITIES.THE VICINITYOFME CS 611E TIB TE RESPONSIBILITY OF TM CONTRACTOR O RTHEPECONRCroR9 MIS.NSELmTOM.1PNfA.ME TO FILL OMAN REPORTSAVOCWID WTTACCOENTSOR SRLLSTWTOCCUR WRNS CONSTRUCTOR.CONTRACTOR SHALL I WATER INCLUDING RANNATEICEN000MEDEO DEMO NTEGMYOG THE PROhM6RDEAND MIS. S SPILL PREVENON WON UTE m 1 PLANS AND MATERLLS6PECIFlEDARE BILEDONCOHvrtiONS OBSERVED.T¢CWTRCTORMV11vEaIv ,MPS,DRAINS,ANDTIERAPPROVEDDMEDICOS.COSOV®LOUtgN BY I. ROO69LEBIOlOSOILS CONFORMANCE OF ME PLANS AND SPEC.GTION9 WDM COSMO CONDNONS AND NOM TM&MI®R E CONDITIONS IN I. NO CAMINO SHALL COMMENCEWITHOUT iNST NDTGYNOME ENEINEEET11.A AREA FREE FRdWATER. S. THE GELD OPER FROM THE CONDITIONS MOWN ON THESE RAIL PRE.GRADING MEMINGATME SITE I9 REQUEFDABHR9 BEFORE STATE 2 NEEP MAILROOM SITETO GRADING WTN TE FOUDWINO PEOPLE PRESENT:OWNER GRAMM PRMPADTHE roHEHA FICIAL 00OBLALILE A�dM SOOICONDUCTOR 11 EXISTING UNDERGROUND MUTES.).IMPROVEMENTS ARE SHOWN N TEIRAPROAMAIE NOPROTALMIOR VERTICAL CONDUCTOR, GRAMMENNONEER.GEOTECIMIGL ENGINEER V.RBG SHALL LMMONITOR UNSURE CONTENT AND ROTATED-1E SO.MSS LOCATIONS RASED UPON RECORD INFORMATION AVAILARE TO THE ENGINEER AT TNEA1E OF PEPARADONGTE.SE RANI AND CITY MO INSPECTORS OR TIIERREPRESEMATIVED DwNATE COMPOSTING ACTIVITY. L E IE .CATIONS MAY NOT HAVE BEEN PERMED PITMELD AND TACCURACY OR COM11TECA TI ESS EN . MASS NO. FORNATI SHOWN IS I USA 011Rs.lERTOB00 AT LEAST NB HOURS PRIOR TO START OF WORK FOR ME OE WRON AREAS OF EARTHWORK PRIMP)RAMO ill OR USE SECTION 72.2.02 MOORS.TURALREMIN/TAME OF RECONSTRUCTED CCN NELP . MLITT LOCATION NARKPMS:REMOVE TEMPORARY CONSTRUCTION MAMMON PAVEMENT AND BOEWALJ¢IT SNAIL BETE STARTING GRADING OPERATORS. SLOPE.ROCKS SLOT.Ni].]S]61LNUPRUCH SHAPE AS FORA STABLE OR 6RALLNGOVETXETOPO.OFSSOE TM TO EH REDUCER.dRICI CCMRCTORSNESPONSOITTY TO DETFAUNETHEEAAIFME AND LOCATION OF PIE UTILITIES SNOW.ON MESE RANSOR 2 BSC,.SUCHREWIRED TOTIONROADE EEDBALKBFBE STNDUONNATAEePECE SITE THE INDICATED 21 TNE FIELD BY USA ANY ASA RESULT O'COTRACTORSFMURRY°VERFY 1 IUP. CONFORM CRO OR Ci�LS SNAILE OF NOT BE USD.ANGUL R6WFDW 6rtPECSWV THE PROJECIDOLOIST PRN TO PUCBUT SHOUIDBE TIONS EXISTING UTILITIES PRIOR TB BBEONNNG OF CONSTRUCTION W.Fw VICINITY,SHALL BE BONE BY THE REQUIREMENTS OF THE 6058 REPORT ANDO.PLANS BPEt6µTI.9. SEDOEPS.c B SNAIL NOT REUSED.ANGULAR SHAPES ITS SUITABILITY.THE PROJECT BIOLOGIST PRORTOPIACEA'ENTTOOEfERMdC 12. CONDESSHO IRCLRMTOTAS CRE TOCCEVASOSOPARRM ACpgUEDTFRTIµp,IOMEON ANY PLANNED 6L1 EMTOOP NEEDLE NYFEDVAILNOTBEE COBEALL FURNISH NTRACTOR PROYDESIPPI GRADE OOAITAL GIUD1AT E STAKES. ODENSEF.TERROJE 0IROTT OENTB ARODIMRRMTOTHE SAE%IS&VASOIR0 S. C MEBIDNORLL PIECES IS ,AB DR'S EXP.SE.FORME ROJECTWTTOTEMIeBAO CONTRACTOR SNAIL TNESPELENGTH.aOPKINYBEUIID FROM GRADES.SECTIONS ARO DIMENSIONS °RCM MATERIAL VAM APPROVAL FROM GFDTEC1wNXENGNEER. GRAOEBSHOWX.IJEFW. W1TONa 010 FOOTOFFlNSRGPADE.WYIREGPM®uREASOp NOT • IS. WORE__UPPER OIL MO �EOWEFAW SDEPMTMFNTAWMEExGNFEAOFRECORD1101 w6PCf COMORS SHALL SE RERUN. TO DD�CORRECTIVE GRADWSTO THESE A NO ELORA THE COST TOILE OWNER ON OF WORK_ It MEDICINE.s BURRORESPONSIBILITYFOR UEMOOOS ME TO I. UPON U ZY RDMZ -LEAN THE ROCKS CA REMAINING SETIONS,TM C A. GEOTECHNICAL ENGMEEFLSRAM BEOTFlED ATLF/.ST1wDR1YDRDIdO CONSTRUCTOR DMZ SLOPE WIER. ANDPROCFDUpF9K PORK BYTECONTUCTOR. FMOP GPADINGOPEUTax1 TREE PRESERVATION S. THE GEDo00OG1 ENGINEER WILL ILLON REIN GRAMSAOVEROTIN. MIG UPON c.o.-Poo CINCLUOMPLIANCE,SOIL TESTS'TNO.AND DETERMINING WE QUALITY OF ME GRAOwa TOR. NS eIALLBETRAxSJORTFDOPF I. A TREE PROTECTION AND PRESERVATION BMTIED M THE CONTRACTOR FOR APROJA.AD=MEETS WTIEWORK, ME SITE BYMECONITADTO0. , PROJECT BOLOOSTAND TIETOVN ARBV • wST,PRORTO"ESTAT OF CORSTRUCOONACTHTE, COIPECTNEE GUFASVRESTOEOTECMCCAL ENGNEFAWILLRROVDEIECNOEFIDFD TIE CONTRACT.. INE TREE PROTECTION PLAN SHALL FOLLOW..STANDARDS AND SPECIFICATIONS DESCRIBED d THETOWN OF LOS ALTOS RILLS TIME PT RQUup CUTSLOPES ro BLEND RAYON TIEµl111 VB.TESTING 2 PRESERVATION GUIDELINES DATED FEBRUARY 2004 AND AM SUBSEQUENT N0.01ENTS R6FRENCESTOVROPETY OWNER'. 0. G ROUND ALL INIER.DAO6OL9 TE9ONOSNALLBEPFAFDRLEDBYAV CONSTRUCTION m.VIENTS=W TIETPEEPRBIECIEN WIDEIaIES6NAl110AVMNTRACTOR-PoRTERIRosEOiIINEOE INDEPENDENT SERVICE COTPALTEDBYTECONfPACT00. DOCTIL91T5 EA6UPEB SRAM BE EMPLOYED QUIEHS CONSTRUCTION LABORATORY RESULTS AND REPoRTSBµLLBEFORWARDED BYTE I 1 COMPACTOR SWILL ACCORD..OTE NAEPACW11IOEIDN AND VERR.121MM. TPAT xE�RF SINNE�� APR. pEYMEFNOw FA CONTRACTORM ECONTRACTOR SNAIL 6UBYrt EBfENGINEER roRFbR6 OTER REVIEW A003 rosA CION OF 4 S. PRIOR TO COMIENCINO ANY GRAMM ON T AR®RST. TIE STETS E LTFROR TEMOWEM BOUNDARIES SHALL BE WORMS.BOUNDARY KARIM.SINCL OR MIETANED THROUT GRADIN.OFFRATgY T CIVIL NOTED I PROTECTAE FENCINGMICR BANNERSEMIL SEP./ZED WHEN STRUCTURES WM.PM WIT OF CONSTREMIDN SHALL BE D NECESSARY. ORANGEC STRUCTiONHMCTECT ADJACENT O PROPERTIES Mir NG PROTECTED BY ADmnTmm IST. roxrt f 'REBroREDTDTHENOP1a.ALcprDmaN.A9 DEDERIHEDBYT¢EOIEflt AREI SSHAlBE/➢PROVfiNMSFIELD BYFRaacTBELaclsr. • ' 2.COxTPACTOR MILL SUBMT PRODUCT CUT BMUS OP PIP ENOVEERFORALµPERILS USED.THE NTE 11.TIE GEOTFOIOCAM ENONEER9MFA OF RESPOD0¢INY SHALL NCIIOE OR/SPAT OF ME EECUION OPTS CONSTUCT1ON OOCULEMS.SUBMITTALS MIN BE APPROVED BYTEEMGNEER PRIOR BUT MED NOT BE LOOTED TO,THE PROFESSIONALOBSFAVATIONAND i TO USE BY THE CONTRACTOR.CONTRACTOR SHALL PROVIDE MATER.SAMPLES PGP MIROAS DETEMOZDBYTE EDUAPPROVA CONCERNINGMOEPPFPNUTON OF GROUND TORECENEFILS, EER INCLUDING NATIVE MATER.REVETMENTS.AMNPIESPOD MATER.WIRED TESTING FOR REOLMED UP TON,STABRPOF ALL MESH SLOPES, DESIGN OF BUTTRESS PILE,SUBORN ESTALIAT ION AD INCORPORATION OP B IME PROTECT WORN SHALL GENERALLY CONSIST OF PROJECT DEBCRPION, DATA SUPPLIED BY ME ENGINEER AND PROJECT=COMM. • ].(SLE TOWN OF LO HILLS I I.0111 CUSHTRNC SHEETS.7.TSRAN SET REFERENCE TOWN O"LnsATOS REFERIINI t WYAEERCED MEVERSCA.TROVFM IN 1299.MGM AFDR ALL TCALTOPOGRAGIVC 30 S0119 OGIEDTWTTE00NPETEWNG I IN D1LS PLAN SET.1021311 .ET s0UT]BLV MUS BERCI-RPM 2211 RO.T.uwmS IFREMONT ROAD.POSTE DONHDON PACE / 1 p0OLO0GE NOTED' CECT PERIOD COTRACTOR EHALACCODOOM E E 1 AL PERMIT CONDITIONSUPONISSUANCE OfPERERMITSOM.. BY TE MOILATORY ADDICES ONAGER APOOR 1,1006GTONNST0 . TNE PLANS uLENTS SHALL SPECIFICATIONS MA LENT CARD OT BBASED ONE TM AWWARDDEER E BOD REPRESENT A NNEEWWTEw OR PROCEFRO/nu1HRED.SO !i COST AS NEGOTIATED MP.TOWN WITH THECONTRACTOR OR AS COORDINATED BY THE TVWMWIMTx010 PARTY 1 ENDO,COORDINATION Of ME WONKWITH ANY MND PARTY VENDORS MIAMI.MILITATED BY TRE COMPPLTORAT xOCOSTTTNEOOL 1 2.CONTRACTOR WALL NARK THE CMOS OP CONSTRICTOR ACTIVITY AS SNOW/.TNEmmRUCTON DOCVMENTSAID APPROVED BY TM ENGINEER. 4 3.ACCESS TOP.sap BY MERCED OR TRACKED EQUIPMENT ONPROJECT ME WM.TMENE OFT1EWARUNr , • BE MARKED DIME E RIID FOR APPROVAL OP ME PROJECT B BIOLOGIST PRIOR TOM STAN OF C9xsTRHCTIOI f ACTIVITIES ACCESS PATHS TO CONSTRUCT.AREAS SILL BE REPAIRED.IND UPON CONFLETO.OF CONSTRUCTION 1 ACTMTED I PRELIMINARY NOT FOR CONSTRUCTION 21106RWOWVON RACE BTR(.HE SC SHEET NUMBER s -ENGEO M Mos AO PG GENERAL NOTES 2 SLYRAM'IRGLPgSMS661 Q¢®fA Je • vORRR aT�- BARRON CREEK RESTORATION -09.e2E.M..m FAX%179.291 P®]OLS RPROJECTHNOS E - Fw TDI LOS ALTOS HILLS,CALIFORNIA RODE 80.XO RE, DATE DESCRIPTION DT uXu .....,. 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IMPTNEk'VVATION TO BE eINED BY ElGRLE7IMF.3 i I TYPICAL CHANNEL SECTION 6 No 84.1.E 1 PRELIMINARY NOT FOR CONSTRUCTION �'B"°" R"" sm..M.tr SC DEMOLITION PLAN SHEET NUMBER ENGEO D ....... __: 3 OQLRD IT JB cmaasmB BARRON CREEK RESTORATION 1 EM �_—E]pec}EX tlDRo9— MxaTmDy6. UMOF9 SHEETS ,;,, �-� LOS ALTOS HILLS,CALIFORNIA PROJECT N0. REY- DATE DESCRIPTION BY AB IWV/N 120PR 000 ORO . j i • I12'CMP(INV EL.211.89) ( I •.... 20 L.F.OF 200 LB.RIP-RFP • S H A L I M A R C'.� 'S- I I I � I I� �, , [v 20 LF.OF 200 LB.RIP-RAP \ �1. PROPOSED PEDESTRIANS /� ,—, RIDGE ��[J' c _ �-/ I -;/ 3-2'.22iLS.ROCK ... `�'\ _�'\ _ _ `r- -, ,'/ OUTFALLS AT GUBDRNN I ^^ DISCHARGE LOCATIONS i/i I, / - / --- 8.00 //� i -'/ ia;, ' __ ------- -- ---ss -;._� 7 g? iii. -___-- ' S5--55 SS 55 ;'---ps • J LIMIT OF{iRADIND CONFORM PROPOSED PEDESTRIAN BRIDGE TOE%IgRoar RADE \ _ �;; •ti '�"� l /i /LANDS OF THE RED ORCHID /� r I// I / ,--•/ 20 0 2O i — '',I 1 SCALE IN FEET -SITE PLAN FOR BARRON CREEK RESTORATION • I RRT wm wnm PLNNTOIO BYDB�AB FOR GRAM! IDMwL WB muua4TDDamw°oRmm I _ • 700 2 crtEEE 2 i ; ub I _ -__I-_ mom. . . 171 EmsR°PaBm I �_ I--Ar FOw �—I 11 PPE. • Il L a --m....n.,wo TYPICAL CHANNEL SECTION <210 -/ T - E xo seas s. {.. R•''''' - ._._ ... "t''1 ema 10*201"m¢.Ip O • PERMANENT IMPACTS ..:'f - `ILTFI —- 11.06 B2M=wATr • .'.. L ) AFTER CONSTRUCTION n----- -- ---- - - - - -- - - -- -- - • ErmmrOasxaa° 00 R0 pG0 ,.. 2.00 a. nm wm WO e• lDSO ngoS RT HNNWATEB STATION IE1.0',... F_ CHANNEL PROFILE - 1 .o • ri'v. o,— s°ME:,.:i(HORR TW - , MINI OUTFALLS B0.0W 70F BMOC . PRELIMINARYT� NOT FOR CONSTRUCTION MEWED BOIL WPM _ m77CSlA'ONiDNRAR .....u GRADING PLAN SHEET NURSER BEELLOOW TOCP F Su".1.10 GUM vAlw LWRN/LNflJrma\v6ef wnim Pc 4 1 ° ENOEO ,A,� °�E*1B BARRON CREEK RESTORATION OF 9 SHEETS — � � � �WO9P� PROJECT N0. . Rev. GATE OESCRPRON BP SSHOPIN LOS ALTOS HILLS,CALIFORNIA 12082.000.000 i _,„---2 �^\ / 20 LF.OF 200 LB.RU'iIPP S H A L I M A R fir••♦ tdrZ G• A.atin,.i;,"»:• COFFER DAM 4 1139 Q COFFER DPM I b.r.•1'%li rt 0 J/\ L`.SILT PENCE WITH �0••••qi J'♦•1ff1 20 LF.OF 200 LB.FUSRAP ITBERROLL PROPOSED PEDESTRIAN BRIDGE j.4 4.�i(• :V• MQ \ - _ II 1� -_�_ 2 Y .....,. 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IJ� 9 F0.��Y fR�� 5 .....♦♦♦:=♦5r....„♦....� f ..u.• - M1 " TLIMIT OF OEMSGRADINGCONFORN" Y SF-FB---9'- -• SPQR-�51 :♦ J I ^7 M TO EKISPNO GRPIIE PROPOSED PEDESTRIAN BRIDGE 11 ` •. / '�..r ..r 1 Q TREE PROTECTION(Tr.) \S". /' '�� ` •1~ u LANDS 0F THE RED ORCHID 1 �N p.,„.. /1;--- f zD to o zo K f \ j �1 y ©ST GING AREA AND 1 j' SCALE IN FEET I„- iy: .,..,r �7 J� .w Q STOCKPILE MANAGEMENT AREA OZ " g r ' i' \ f IL j: QCONSTRUCTION• CE1I' \L. ) I .'"'" 1 I •• • ....' 1 \Nc,_,,/ ,.//,•/ �ti•� •-•••• �f'"� l } �. _= — { .�_� -- 'C- I , EXPLANATION E f y ( �— —^ �_^--I - — CONSTRUCTION ENTRANCE /�"...._�, — _-----------•:::11-• e- '-•----k-s. EROSION CONTROL FABRIC -...,,Y..��rL ...... 41--/:---- _.-.•,--_ _--811) vv} • • m —SF-m—SILT FENCE WITH FIBERROLL i• 4 1 TB DETAIL REFERENCE ic 1 ,y,r SHEET REFERENCE I 1 1 PRELIMINARY NOT FOR CONSTRUCTION AIOCED.1'CNNONRACF RV WO rt:sC SHEET NUMBER a � EROSION CONTROL PLA OMMR PD N ENGEO YNRNKKD010M196205 • ——�y�T �U��_ wee '�rt BARRON Ri CREEK RESTORATION OF 9 SHEETS yA =arose PROJECT N0. REV. DATE OLSCRmnox BT •0U0• rt+•R.f'U RowN LOS ALTOS HILLS,CALIFORNIA 12081.000,000 • 4felti e'FIB.ROLL J/A'X]/1'N]6' E8•gn1.CC R:APO S ArSEUD i0 BE USED Fd STIR. CLATa AND ORT RHO AP S ONLY. I��N Sly[ CPViRACTOR SMALL SUBUIT.W ERASION LONiP0.PLAIT Fd CGMCNIS AND APPPovl.1 BY ME i NA%'. SPACNG ENTRni N RUNOFF WATER WITH SEOIYEHi FM1IFAEO WATER 2.NS PLAN MAY NOT COKER ALL MESS TONS THAT ARISE DURING CONSTRUCTS WE. �� \) o nOPATED REVD CONDOMS. GENERAL.THE CONTRACTOR IS RESPONABLE FOR KEEPING 5'RAD. SE ENT-LADEN STORMY/AT.RUNOFF FROM LEAVING THE 91E,STRAW WATTLES SAND BAGS,AND AROUND C)� A yAX SILT FENCES 9441 BBVEEU BY THE CONTRAClM ON An AS NEEDED BASS TO INHIBIT SILT IRON • TREE SHfO _ LEARNER ME SITE. SING.TEMPORARY, EAS OF CONCENTRATED OVERLAND FLOW.SHALL • GRApE I SE ONE OF ME SEDIMENT BARRIERS SHOWN UNTIL UPSTREAM SOILS ARE STABILIZED. MI ler: %J;(j.;q 1 THE CONTRACTOR SHALL BE RESPONSIBLE FOP ANY AND ALL DAMAGES TO PUBLIC AND/OR %k!ri5s'i"Y?JIS?C PRIVATELY OWNED AND LINNTNNCD ROADS CAUSED BY ME CONTRACTOR'S ACTIVITIES AND ALL BE RESPORSIME FOR THE CLEANUP OF ANY YATCNO SPNLED ON ANY PUBLIC ROAD ROUTE. NOTES. NOTTS. ON THE HAIR ROUTE. ADJACENT PUBLIC ROADS SHALL BE CLEANED AT THE ENO OF EA. • 1. TREE PROTECTION SHALL AERC TO TOWN OF LOS 1. PREPARE SLOPE BEFORE ME FIBER ROLL PROCEDURE IS WORKING DAY. ON ALTOS HILLS REOUIRfMCNIi STARI[D. A EROSION OVEGVCONEOPERABLE OCTOBER THROUGH APL IS OR UNTIL VEGETATION IS ESTABLISHED ON UPSTREAM CA ..SURFACES. 2. TREE PROTECTION FENONG SNWL BE CRAW LIN(AND 3. RTCR Pal.WSiaWTION REWIRES THE PLA4YCNT:',N ND STAKED AS APPROVED BY THE ENONEEU .1CONTOURM THEA SNIN�A FLANS ]'TO 1'DEEP. p S BORROW AND TEMPORARY STOCKPILES SHALL BE PROTECTED STM APPROPRIATE EROSION CONTROL MEASURES(TARPS.FIBER ROLL BARRIERS CIC)10 ENSURE SET DOES NOT LEAVE THE 1 USE A STRAIGHT BAR TO DRIVE HOLES THROUGH ME DOER (` SITE OR ENTER THE STORM ORNN STONIER. 11 TREE PROTECTION DETAIL ROLL AND INTO THE San.OR 500000 STAKES. ryd 6.ALL TRU.TIRES SHALL BE CLEANED PRIOR TO EATING THE PROPERTY. NOl TO SCALE A,DRIVE ME STAKE THROUGH ME PREPARED HOLE INTO THE NG PERIODS WHEN STORMS ARE FORECAST- �L LEAVE ORNLY ONE ON IWO RISES Al STAKE EXPOSED L 111f'V*`.-y- #.Y a EXCAVATED SOILS SHOULD NOT BE PLACED N STREETS S ON PAVED AREAS • E STO.PUNG IS NECESSARY,USE A TARPMNN AND SURROUND THE STOCKPILED MATERIAL 5.INSTALL STAKES THREE FEET ON CENTER THROUGH ME17 'JJJD V I ] (SO-TIGHT 1 y B WITH A FIBER AE BARRIEROROTHER RUNOFF CONTROLS. LENGTH OF ME LIBER ROLL Y ' 1 AWP S E tE E�1 W C.MORdIdLY SWEEP ALL PAVED AREAS EXPOSED 10 SOIL EXCAVATION AND PLACEMENT. YIR/JT 1AON CR AS APPROVED TARP. —• ( )IIIA y(1610) DURING PERMS WEN STORMS ARE HOT FORECAST SEE NOTE J 6.ADJAC[ BER ROLLS SHALL TIGHTLY ABUT AND OVERLAP A Y) a REVLNT SIOKPL LE MATERAL FROM ENTERING THE STORM SAW SYSTEM. GRAVEL SA. 'ST(}p�LEI FIBER ROLL a NINIMUN OP']FEET. .-'.• }?Y�5A..11-}-$. % 1�.tfl�(A1,-4 i:.1l D.THOROUGHLY REMOVE LOOSE SOIL NA SWEEPING FO LOWNO REMOVAL OF DIRT. • T.RUNOFF MUST NOT BE ALLOWED TO PUN UNDER S AROUND S DIE CONTRACTS SHALL IMPLEMENT BEST YARASEMENI PRACTICES LISTED ON TNS SHEET. - RBCR ROLL MEASURES REGARDING THE MOOR.a NON-STORM WATER RUNOFF SHALL APPLY ttAR-RWKO. STALL.LOTIONS SHOVM ON PLANS W SLOPE AREAS DIVERSION RIDGE e `\\ 6 SPACE CB.ROLLS EVERY 10 VERTICJL FEET ON SLOPE. . THE EROSION CONTROL PLAN AND ACCOMPANYING PLANS SHALL BE ON-SITE AT ALL PLIES `EAS 50'(110)NN. 10.IME RAYL MSC55 ANO RA-MAR lEL£PNONE HUMBER(#TEL PEPSIS RESPON90LE FOR TI O FIBER ROLL DETAIL PAN CONTROL AY SHALL BE PROVIDED TO THE CITY,INCLUDING ME EROSION ANO SEONENTATIDN tl9II5. NG sat NOT TO SCALE NOTTS. . MIME 1. THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION THAT WILL PREVENT TRACKING ADDRESS: I. STOCKPILED CONSTRUCTION NATEMRE TE0 ON EALL BE E CONS WITTN THE LIMITS a OR FLOWNG OF SEDIMENT ONTO PUBLIC RIGHT-OF-WAYS MS MAY SE TOP TELEPHONE NUMBER: SOILS FROM ME RICO..SHALL BE SELF CSN N D ABHP S DEPICTED DRESSING,REPAIR AND/OR CLEANOUT OF ANY MEASJRCS USED i0 TRAP SEDIMENT. EMERGENCY TELEPHONE NUMBER ABOVE AND REMAIN COMPLETELY SEPARATE Al ALL TINES I.WHEN NECESSARY,ARMS SHALL BE CLEANED PRIOR TO ENTRANCE ONTO PUBLIC • Z. CONTRACTOR SHALL INSTALL FIBER ROLLS PROMO ME PUDUETER OF METAL T-PAST.TIP ERE SEDUM CONTROL POST-OF-WAY. BLIP'S FOR PRObONANO'FOMENT rMTRa STOaPILE. FABRIC OVERL.S,FASTEN TO ENSURE NO GARS 1 CRUSHED STONEST T DRSIRST TO AR APPROVEDNSERYENTATRAPBLKR SED PENT I. PROPOSED BEST MANAGEMENT PRACTICES TO REDUCE PTLUTANTS IN STORM WATER WSCHARGES 1 STOCKPILES SHALL BE COVERCO WTH MWM RAM S-zona TARP OASN LL BE IMPLLYENTD ON SITE,INCLUDING MINIMIZATION AND STMUTATION a DISTURBED SIS SECURELY SDdIED MOM➢ME OIRRD PRIIJEI. /, SEDO4NT CONTROL FABRIC TALL PROTECTOR OF ASHES AND CHANNELS.PERIMETER CONTRAS.WiERNAL EROSION NTH GRAVEL .S ISE FA A.CONTRACTOR SHALL PLACE MIRAR 16TH OR APPROVED EQUAL UNDER ALL AGGREGATE AND OL AND SPCORC BEST MMAGDCNT PRACTIa£ I, ,-GRADE i-POST,TP. 1i1- 3. TRAMS OF INSECT.PERSONNEL WILL BE CMOUCIEO PRIOR TO WftEMENTATION OF THE O2 STOCKPILEu % RFP PROGRAM.ME MONITORING PROLAAM SHALL INCLUDE PEaAAP SIE WSEECTONS (TYP) KENT ONTRa OVE CONSTRUCTOR.MMCF T COMPLETION OF PROJECT ARTS MONITORING FORMS AND COYPUANCR C.IFI.TDN SHALL BE PROVIDED TO THE D ESTE TO PRE-CONSTRUCTS CONDITIONS.RESEEDING NTH NATIVE NIX MAY ERIC BE REWIND AT ME DISCRETION a ME ENGINEER. OWI.AND ENGINEER BY ALLY 1 FOR ME PREVIOUS TEARS ACTIVITIES i PTR I 8' I GRADE 1 ME 1M115 CF GRADING SHALL BC STAKED.IFt1aD MM SIT FENCE AND APPROVED BY ME N L. �-I UPROPf TOWN PLANNER PRIOR TO GRACING OPERATIONS.VEHICLES AND EWIPNENI SHALL BE UNITED (,}`'Ai1O O CONSTRUCTION ACCESS DETAIL M THE EASING R.A.AND i0 MINN PROJECT UNITS. i FENCE SHALL REMAIN 1µ00T p,J AT ALL TWE£W ME EVENT OF DAMAGE 114 FENCE SHALL BE REPMRE°IMMDIATELYM T,-3. • B• NOT TO SCALE E INCIDENT REPORTED TO ME PROJECT ENONEER MO Tam TANNER.VEHICLE UYP DISdARGE �` apo. SHALL BE ALLOWED IN DESIGNATED N.C.STORAGE AREAS ONLY. TO OOWSSMEA I 1155 4. FIBER POLL BARRIER-FIBER ROLL BARRIERS SHALL BE PROVIDED(I)NEAR THE BASE OF FILL SLOPES(I)ALONG ME BASE OF WT SLOPES(EXCELLING ONE ACRE OF DISTURBED GRADING I •••••••••••48.11.4.8 44 EXCLUSION FENCE AREA).AND(J)AT THE BASE OF ALL GEOTE.NICAL REPAIR SITES.FIBER ROLL BARDS AIRRN--_-__ NOT r0 SCALE WALL BE PULLED ON CONTOURS FOR RLL SLOPE CMWnONS AND GEOTECHNICAL REPNP SIES. dims AH�V (>_ E. PAR./DAG ME EDGE OfT SLOFE SHALL f PAVEMENT(ADEN TE T uENTCSTORAfGEE SHOU D BE PROVIDDED I Y"�� O,9 BETWEEN ME FIBER ROLL BARRIER AND TOE OF SLOPE AT ALL'WES). EAST.PROFILE OF Rik%•u9ON N• S. SIABIUIED 1MSTRUCIION ENTRANCE-A STABILIZED CONSTRUCTOR ENTRANCE SHALLBE I , CHANNEL(VANES) PROPOSED We BMASN PIPE AT CHANNEL 0 PRO D 10 EUNINA E SST HACKED ROY ME 9 F ME CONTRAC S IS RE9 MSB E FON PROPOSED GRAVEL HOOTERS OVERLAP 19'NN.E A C MIAMI/ r..2.=STARILRED CONSMUCTIM ENTRA c AS CM ffo PHASES DICTATE TILLED 5A.5(TTP) ARDWARE OLOM TO OOVMSTREA/ ffCTON B-B 15 NSWECN CLAMP PENCL6. CONTRACTSHALL SUBMIT A DEWATERING TA. TO ME ENGINEER FOR APPROVAL. VEPROWRAnMIPE S P rA OAAuf STRING SELL IP EXTRA STRENOTR FILTER FABRIC PERFSATON5 Ai f E D MOVE NEEDED PATROL?lilRE MESH SUPPORT 1lv C ST G BADE EXISTING EDGE PROPOSEDSTEEL OR OF BARK(VARIES) GRAVEL FILLED ,1/t I1■ R ROT\ I: B4 � ss1 1 .41011111111 I 1110.0O�IIlk00.4 O�/� - .�... - u .... SECUATE4CRELY FILTER FABRIC PSTRE i I i, B SECURELY i0 UPSTREW I I 1 ' 0-0-11P41.01.e•� I SIDE OF POST I IIe� ��19�itl����EI IIID��� rnAtn , ��I V111III I ILII,i 'I III • • [ASTNO BOTTOM . 1 111111r111161111/11 1 II 1 VLOAT°[WATERINGOUMP aCHANxC1(VAPES) NOTF, ` I gill I�IiIII�����iII�..�I. ,� STILLING.1 A PLANE ENT a EAd OFifli DAM AND -'J I `7 `� 1 NE TE OPNRAnON SHALL BE - IiI Il I III III L ' . . .. • • RIMOSE➢ZI's BMA55 PIPf Ai STALLED B L CONTRACiM 10 THE , OVER NMP SATISFACTION OF THE ENGINEER -.•L- x Nab Dwarf CLAM• y pWMP DISCHARGE TO DOWNSTREAM I _/� IO (9 f MAXI/dU/A SP.IL/A1i Iii 1 A p A SHALL BE THROUGH HARD PIPE - BOAT CONIRaIlD / / D \1� 1 {Y/RE SUPPO.4T fEAYE 14 M LT SA.DISCHARGE aEzr.RINc PUMP \e�C v f 6 /F B)oza SPALL„,.NITNLV/T [FrnHTS A-A ON4 SUPPORT FENCE 1 PAN VIFW i N15 5 COFFER DAM DETAIL 7 SILT FENCE DETAIL ' _ NOT i0 SCALE PRELIMINARY NOT'FOR CONSTRUCTION l) NOT TO S.LE SID VCNN%PIES mmD..SL SHE ET NUMBER RI4a0 a1XBT PL EROSION CONTROL DETAILS 6 ENGEG EAHRAMOILG9WPEAS�X ce®R,IB __���//��_ Lvgmvm mlt: BARRONCREEKRESTORATION OF 9 SHEETS FAYL�9P� PEBR011 PROJECT NO- - MATADXD F0 L - Tom- LOS ALTOS HILLS.CALIFORNIA ROJEIAD.DIA REV. DATE DES[RNTDN BY - AS SHOWN SOIL PILE FROM TRENCH FLDW �� SEE SHEET B FOR SLOPE INSTALLATION METHOD "••, .../411° *\7.1 -- �j\"I�j� �1 Z�/N 1Row OF STAPLES, p��1 .1' 12'0.C. FOR CHANNEL TRENCHING METHOD, ` L���/4�%v� 2 ROWS OF STAPLES, SEE DETAILS 8 69,THIS SHEEP •v41A STAGGERED,6'O.C., SIDE SEAM FABRIC OVERLAP.. 11 FADER SEE DETAIL 6,THIS SHEET . STEP 1 OF ROLL OFABVERLAP, FLOW `v/, 2ROWS OF STAPLES, SEE* ETTHISSHEST # F-� ET STAGGERED,6'0.C.. • $' '!• SOIL RUED ♦• � 2DJ �/_Z/1�/ FROM SOIL PILE, - - \ /0/ COMPACT WITH FOOT STEP 2 SEE DETAILS N`'`•`•:,. -.4411tItell4100'.",, CHANNEL TRENCHING //. _ METHOD^A" C) I NO SCALE I \/ '` • � _ '1 ` TRENCH APPROIL SOIL PIE _ I NOTES: - 1o•WIDE:e•DEEP FROM TRENCH 1.SEE CURLEJPSLOPE APPLICATION DETAILS ON SHEET B FOR _ �� PROPER SLOPE INSTALLATION. �18•'� _ !•- •"FOR FABRIC TERMINATION, 1 av��'�\V\•� / 2.STAPLE PATTERNS ARE DEPENDENT ON sat CONDITIONS. _ • • • • • • SEE DETAlL3a66,THIS SHEEP `\ \�( �`�yJ� SEE CURLEAOSTAPLE PATTERN GUIDE FOR DETAILS(SHEET S). • • • • • • • • • \ • _ >Y/��♦I/��/,'��\G„ G _ - vL�+J•4t. 1ROW OF STARES, 1 2 ROWS CF STAPLES • CHANNEL DETAIL O STAGGERED 6'STAPLES, CS FABRIC OVERLAP,Yi' 4'APART,STAGGERm, EA.DIR. S.O.C.,STAPLESTOBE NO SCALE ] I r PLACED CLOSETO EDGE 6'OVERLAP UPSLOPE RIC OVERLAPS DOWNSLOPE FABRIC \,1���'`�,1��\\ STEP1 OWS OF STAPLES i =ON OF FABRIC IN A SHINGLE AFFECT. -�'at.�11i$ltOl0.4 It.. 4R APART,STAGGERED, !+ ♦` ~,...-1Pir%/),v`.�, i \\\ 6.0.C.,STAPLES TO BE { .�\\j/'`/\' \j//�\\ JPLAERVEEXCO !\ \�� ,���/./Y): PARALLEL WITSTAPLES SHOULD H\ �\ . ANICET lW '\�,��/♦�V'�5.§1{�/�v/�\/�♦• DIRECTION OF ROW�..I r6• STAPLES ARE THROUGH •� /shy •\-(I FABRIC TERMINATION 0 ♦v j�/\2/'/\,��♦t1. BOTH BLANKETS. �..- h,rO�'Q�• ND SCALE I t�✓�!*A.,!r5 ♦`I 2ROW5OF STIPPLES ,—I F3' \/��� 1�,`aT•,�;,/ a•APART,STAGGERED, SIDE SEAM FABRIC "\\`,L.- ,�q� SOIL FILLED s•o.c. OVERLAP STAPLE DETAIL O O•Ic /'�Q•' FROM SOIL PILE, I FABRIC TERMINATION PLAN 4O NO SCALEp3 COMPACT WITH FOOT FABRIC END NO SCALE I OF ROLL OVERLAP O STEP NO SCALE CHANNEL TRENCHING ' I SEE SHEETS SEE SHEETS METHOD"B" O FOR SLOPE FOR SLOPE NO SCALE INSTALLATION CHANNEL INSTALLATION METHOD INSTALLATION METHOD METHOD STAPLE 12'O.C.ALONG 9 FABRIC AT SLOPE -SLOPE FABRIC TO BE INSTALLED FIRST AND EXTENDED MND BENCH CHANGE TaY B�YOND THE TOE OF THE SLOPE(SEE SHEETS FOR �” L_ "`,` SLOPE INSTALLATION) 3.,0. J\%�i�i_J 3'-0•MIN.� /;'. MIN. ,��i>H, STAPLE W.O.C.ALONG O• ��' !�•!!/pl BOTTOM OF FABRIC -.4.f.,4% L BLANKET TO BE CENTERED \ S� AT THE END OF SLOPE ;//t�/�I/., . /" / TTO O OFFSET A SEAM IN / i '//( \// ,a��;/`�s'/'// I• CHANNEL / i/�i i�p��pi/iiGr!i GO/,, I ".ay;1\�,`i/I�//` MN. 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