STATE OF CALIFORNIA A . CALIFORNIA NATURAL RESOURCES AGENCY I DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Pyramid Darn No. 1-56 County L03 Angeles Type of Dam [Earth/Rock Type of SpillWay Concrete weir and open channel Water is 27.7 feet_ above spillway crest and 30.3_ feet dam-crest. Weather Conditions Light rain Contacts Made See list of participants at the end of this report for Inspection_ Periodic Maintenance Inspection Im ortant Observations Recommendations or Actions Taken . The pajama cracked with a hole and the broken panet should be replaced. . The suiiort sistem for the ventilation system is heavily corroded and falling down? Conclusions From the known information and visual inspection, the darn, reservoir, and the appurtenances are judged safe for continued use. Observations and Comments The asphalt road on the crest of the dam remains well aligned and in good condition. The upstream and slopes were uniform, stable and in good condition. The minor erosion at the access road near the midsection of the dam is in satisfactory condition; rock material continues to be added as the erosion increases. Vegetation control was excellent and rodent control appeared satisfactory. Bait traps are installed on the embankment. but none of the bait traps appeared to be stocked. Spillway There is an auxiliary spillway and primary spillway with radial gate. The auxiliary spillway was open and clear and the ages weir remains in good condition. The unlined shale channel of the auxiliary spillway was traversed and appears weathered with more eroded material in the channel than compared to my last inspection 5 years ago. The two sections of shale bands of the auxiliary channel appeared normal. The radial gate at the primary spillway was full closed with some minor see a passing under the left and right sides of the gate. The bcx? was cracked with a hole and the broken panel should be replaced. The 45 degree stress crack at the left wall of the gated spillway near the trunnion connection appeared unchanged. It was reported that a special inspection of the radial gate and primary spillway channel are scheduled to occur in the nearfuture. The approach, channel, and exit to the spillway were open and clear. The concrete that comprises the spillway remains in satisfactory condition. The joints appeared to be well aligned and in normal condition. The seepage at the left joint of the flip bucket was seeping. Water seeps through the invert joint and out through the corresponding vertical joint of the left spillway wall. This area was previously patched and the patchWork appears to be degrading. If the patchwork at outside bottom left spillway wall near the flip bucket is replaced it is recommended to reseal the corresponding invert joint. Inspected by JOE: Boy Photos taken? N0 Date of Inspection cc for Owner/Book Date of Report 041271201? i" own 1261 (Rev. toms) Sheet ?1 of 7 3357571"? INSPECTION O. DAM AND RESERVOIR IN CERTI: STATUS Name of Dam Pyramid Dam No. 1-55 Date of Inspection 04/ 1 8/201 7 Observations and Comments Outlet Seepage Other The outlet of? None ofthe valves were operated during this inspection The outiet controls appeared to remain in good operating condition. All the valves were cled during the July 12, 2016 inspection with no difficulties reported except for the- valve only opened 67% and was scheduled for restoration to open 100%.- were traversed. The upper had heavily corroded supports for the venti ation em; some areas of the ventilation were a Ing down and needs replacement with composite material that will not corrode. The- had an increase in spalls_ but seepage appeared low and normal. There were no signs of visible seepage located on the slope or at the groins. The seepage weirs had the following flows: Weir Flow ?4 Vt 0.6 11.5 The weirs were flowing clear and normal for the reservoir level. The instrumentation for this dam consists of 8 plezometers, 38 survey monuments, 54 crack monitoring pins (no longer monitored), 4 seepage points, 3 inclinometers (no longer monitored), 2 accelerometers, and rain gauge. The latest instrumentation report was transmitted on March 4, 2016 and includes data up through September 30, 2015 for Pyramid Dam. The data was reviewed and commented on in the July 12, 2016 inspection report and found to show no concerning trends or conditions. The instrumentation data shows that the dam is performing satisfactorily and no new instrumentation is needed at this time. The following personnel participated during the inspection: FERC: Arthur Reis David Panec, Olivia Virgadamo, Amber Haddox, Vanessa lVlorenes SFD: Joseph Salazar, Joel Quintero, Mark Kellog, Hamid Eshraghi DWR1261(rev.10109) Sheet 2 of 7 INSPECTION o. DAM AND RESERVOIR IN CERTI. .513 STATUS Name ofDai-n Pyramid Darn No. 1-66 Dale of Inspection 04/18/2017 . View of the rest. . a View of the upstream slope. DWR 1261 (rev. 101'09) Sheet 3 of INSPECTION DAM AND RESERVOIR IN .Eo STATUS Name of Dam Pyramid Dam No. 1-66 Date of Inspection 04/185301? .. . 1? . View of the slope. Minor erosion at the slope at the access road. DWR1251 (rev.10109) Sheet 07 4 INSPECTION LI. DAM AND RESERVOIR IN CERTII IED STATUS Name of Darn Pyramid Date of Inspection? 04/18/2017 Tit-"- whiz :5 I bit? *Xc??w ?3 511?? The" ?uxiliary spillway weir was in good condition DWR1261 (rev.1OI?09) Sheet 0f . 7 INSPECTION (J: DAM AND RESERVOIR IN .ED STATUS Name ofDam _F?yramid _Dam NO- Date of nspeclion_ 04/18/2017: DWR 12Ei1 (rev. WIDE) INSPECTION O. DAM AND RESERVOIR IN JED STATUS Name of Darn Eyiamid [Jam No. ?1-66 Date of Inspection Q4fj8f2017 DWR 1251 (rev, DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS STATE OF CALIFORNIA f. a. CALIFORNIA NATURAL RESOURCES AGENCY Name of Dam Pyramid Dam No. 1-55 County L03 Angeles Type of Darn Earth/Rock Type of Spillway Concrete weir and Open Channel Water is 28.7 feet. above spillway crest and 29.3 feet below dam crest. Weather Conditions?afm. sunny, and clear. Contacts Made See below Reason for Inspection Periodic Maintenance Inspection Important Observations. Recommendations or Actions Taken None. Conclusions From the known information and visual inspection. the clam, reservoir. and the appurtenances are judged safe for continued use. 0_bs_ervations_ and Comments Dam The dam crest was well aligned and In overall good condition with no signs of distress Both the upstream and slopes showed no signs of distress and appeared stable uniform with no signs of instability. The minor erosion riles along the crest shoulder and the erosion rile along the access road appeared unchanged from the previous ins action Vegetation control was good and there were no signs of rodent activity. The appeared unchanged from previous inspections; corroded metalwor is scheduled to be addressed by 2018. Spillway Emergency Spiilwav: The concrete ogee was walked and found to be in satisfactory condition. The approach to the spillway was clear of objectionable debris. Control Spillway: The concrete comprising the radial gate control structure, chute, and flip bucket appeared structurally sound and in good condition and unchanged from the previous inspection. The radial gate and its 0 eratin ui ment a eared to be in good overall condition. Iwas informed that gate's% had been replaced and the gate was fully exercised in late 2015; this completes planned maintenance items for the radial gate. The joints between the Plexiglas panels should be sealed with a clearjoint compound to help better protect against the elements as previously recommended. Outlet The outlet_ appeared to be well maintained and in overall good operating condition (see table below or gate cycling during inspection). Corrosion observed during previous inspections? had been satiSfaCthi'Y addressed (cleaned and recoated). cled 100% 100% 100%? 67% 100% 102% Releasin 2cfs Scheduled to for repairs to allow 100% opening Inspected by S. O. Jone?j- Photos taken? YES No Date of Inspection _7 2H 6 alibi/Ira '33 for OWHEIIBODK Date of Report 916/1 6_ own 1251 (Rev. tome) Sheet of 6 Name of Darn Pyramid Qbs?er'vations and Comments Seegage Contacts INSPECTION (Jr DAM AND RESERVOIR IN STATUS _Dam No. Date of Inspection 771316 - No signs of seepage were noted on the face or along the abutment contacts. Seepage measurements were recorded as follows: See 2.?3 s1 s1 31.. . The observed seepage was within historic limits and flowing clear. The instrumentation consists of 8 piezometers. 4 seepage points, and 38 survey monurnents; the 3 inclinometers and the 54 crack monitoring pins are no longer monitored. There are also 2 accelerometers, a precipitation gauge, and a reservoir stage gauge. The most recent instrumentation data report is dated December 2015 and covers the period between October 2014 and September 2015. The eight open tube piezometers,? continue to follow past trends and do not indicate any detrimental trends. Piezometers P-ESD. and show varying levels of responsiveness to precipitation; while no detrimental trends are observed. it could be beneficial to better seal the tops of these piezometers against precipitation intrusion. Peak toe seepage during the review period was ~35 (average ~10 gpm). TUnnel and Adit seepage measurements on average were 1.1 or less. All seepage measurements are highly effected by precipitation. Survey data shows that the settlement along the crest has not exceeded the design camber. Maximum cumulative settlement along the crest is about 2' recent year to year settlement along the dam crest has been Maximum cumulative horizontal crest movement has been about 15" the direction with recent movements within the error of the survey. All other survey monument show littleino progressive movements or developing detrimental trends. The data reviewed indicates that the dam and reservoir are performing in a satisfactory manner. The col-rent instrumentation and monitoring schedule is considered adequate. Arthur Reis (FERC). Bonnie Duecker, Joseph Salazar, Victoria Valentine, Joel Quintero, Willie Castillo, Jaime De Santiago. Mike Barrera, Joseph Cruz, Hamid Eshraghi. Olivia Virgadamo. Amber Haddox, Richard Sandoval, Eduardo Trejo, Vanesa Morones. and Curtis Green (DWR). Sheet 2 of 6 INSPECTION or? DAM AND RESERVOIR IN STATUS Name of Dam Pyramid Dam No. 1-65 Date of Inspection 7112/16 a y'jtPhoto 1 Crest and face looking towards the right abutment. u. [v I .w ?Rf t1.? Inf Erosion rile to monitor DWH 1251 (rev. 10.109) Sheet 3 Of INSPECTION Ur' AND RESERVOIR IN CERTIHED STATUS Name of Dam . . . Dam NO. Date of Inspection 7712/15 DWR 1251 (mu, ?1:09) Sheet 4 INSPECTION OF DAM AND RESERVOIR IN STATUS Name of Dam Pyramid Darn No. 1-56 Date of Inspection 2?16 Photo 4 Emergency spillway ogee weir. DWR 1261 (rev. 10(09) Sheet 5 0f INSPECTION OF DAM AND RESERVOIR IN STATUS Name DI Dam Dam No. 1'66 DWR 1261 (rev. 10"09} STATE OF CALIFORNIA . CALIFORNIA NATURAL RESOURCES AGENCY DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Darn Dam No. 1-55? --.. County LDS Angeleis? . Type of Darn Earth/Rock Type ofSpiliway Concretewt?t?tand Open Channel Water is 2&6? feet above spillway crest and 2_9_.4 . feet dam crest. ?El. 2575.8 Weather and Cool Contacts Made Amoerno?t?f?o?ioon Mono. Loon 'eoofi?gojgoao Alt-redo Rodrigu_e_z Jr. of own osu_ Reason for Inspection-Exercising lm ortant Observations Recommendations or Actions Taken 1. All bolts were removed. inspected, and reinstalled. All the bolts were in sound and serviceable condition and no problems were encountered during this exercise. 2. The bolts are located in a corrosive environment, and they should be exercised and maintained on a consistent basis. 3. For safety, all ?valves were locked out during the entire shutdown period and the valves could not be cycled. Conclusions From the known information and visual inspection. tit?o judged safe for continued USE. Observations an_c_I_Co_n_1_n_1_ents Outlet The operation went Without incident and the bolts, nuts, and washers were in sound and serviceable condition. The bolt threads were coated with Loctite nicltel anti?seize compound. LII . if: Inspected by .. l7? Photos taken? NU Date of lnspection cc for Date of Report 12/15/2015 owe-1251 (Rev toms) Sheet 1 . of if) N5 N. 1-: INSPECTION UH DAM AND RESERVOIR IN CERTII-IED STATUS Name of Dam Pyramid DmnN?_ 1435 Date of Inspection 12/032015 Qbservatigns and Comments As noted during previous inspections. the location is a corrosive environment. Although conditions as compared with previo us re orts a eared similar. continued monitoring is needed. The-bolts on the right side?had more corrosion as compared with the left side. According to Mr. Madrid, the ri ht side bolts are continuously Sprayed by weed Due to the corrosive environment. it is important that these bolts be exercised on a consistent schedule and replaced if necessary. Due to safety considerations, the valves were not cycled during this inspection. Ms. Haddox informed me that she soul the valves during the spring, or during the next annual inspection. schedule the ing of DWR1261 (rev. Sheet 2 of 4 INSPECTION OF DAM AND RESERVOIR IN CERTII-IED STATUS Name of Dam?y?ramid Dam No. 1-58 Dale of Inspeciion 130212915 DWR 126'1 (rev. 10;an INSPECTION OF DAM AND RESERVOIR IN STATUS Name of Dam "nyamjd Darn No_ 1-66 DWR1261 Sheet of CALIFORNIA NATURAL RESOURCES AGENCY DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS STATE oF CALIFORNIA II I II Name oiDarn Pyramid Dam No. 1-65 County Los Angeles Type of Dam EarthiRock Type of Spillway and Open Water is 28.8 feet above spillway crest and 29.2 _reet below dam crest. RWS- Weather Conditions Clear hot and windy with periods of lite rain. Contacts Made Jaim?e De Santiago, Joel Quintero David Panec Amber Haddox, Nic George and others. Reason for Inspection Periodic Maintenance Inspection Important Observations, Recommendations or Actions Taken It was reported that the bolts?will be exercised' In November of this year All- valves should also be cycled at this time and advanced notification provided so that arrangements can be made for DSOD personnel to attend. Conclusions From the known information and visual inspection, the dam. reservoir, and the appurtenances are judged safe for continued use. Observations and Comments [lam The dam crest was well aligned and in overall good condition with no signs of distress noted; however, there were some minor erosion riles along the crest shoulder that should be monitored for progression during future inspections. Both the upstream and slopes showed no signs of distress and they appeared stable, uniform, with no signs of instability noted. There is a larger erosion rile below the access road and it appears attempts have been made to remediate this but dumping rock fill; this should also be monitored during future inspections. Th_were traversed and they appeared unchanged from previous inspections. Vegetation control was good and there were no signs of rodent activity. Spiliwav Emergency Spillwav: The concrete ogee remains in satisfactory condition and the spillway was clear of any objectionable debris. Control Sgillway: The concrete comprising the radial gate control structure, chute, and flip bucket appeared structurally sound and in good condition. The radial gate and its operating equipment appeared to be in good overall condition. During the inspection. the radial gate was cracked open a small amount to provide required stream releases. As re uested durin the revious inspection. the sheet metal boxes installed to protect *have been replaced with Plexiglas boxes to allow for visual inspection. The joints between the Plexiglas panels need to be sealed with a clear joint compound to help better protect against the elements. An April 16. 2013 Memorandum from listed planned actions (maintenance items) for the radial gate and noted that these actions were to be completed by December 31. 2014. While many of the actions had been completed, replacement of the gate's?have not been completed. Ms- Haddox informed me that this work is expected to be completed by October of this year. Outlet appeared to be well maintained and in overall good operating condition. Corrosion was observed during the previous inspection? this appeared unchanged Inspected by 8-0- Jones Photos taken? Yes No Date 8/2315 cc for OwnerIBook Date of Report 9/2315 DWR1261 (Rev. wrest Sheet 1 of 4 INSPECTION Ol- DAM AND RESERVOIR IN STATUS Name of Dam Pyramid Dam No. 1-66 Date of inspection 3/25/15 Observations and Comments but should continue to be monitored and ared to remove the corrosion and was walked with no signs of distress noted. I was informed that bolts were scheduled to be exercised in November of this year. Arrangements should be also be made to cycle all of thlalves at this time and advanced notice provided for DSOD personnel to plan an inspection. Seegage No signs of seepage were noted on the face or along the abutment contacts. Seepage measurements were recorded as follows: Weir tlon 5.6 Trickle Trickle Trickle The observed seepage was within historic limits and flowing clear. Instr. The instrumentation consists of piezometers, 4 seepage points, 3 38 survey monuments, 54 crack and joint pins. and three inclinometers. There are also 2 accelerometers, a precipitation gauge, and a reservoir stage gauge. The most recent instrumentation data was submitted on December 23, 2014 and reviewed as part of the previous periodic maintenance inspection. of the-dam Photo 1 Upsetramface DWR1261{rev.1Uf09} Sheet 2 of 4 INSPECTION DAM AND RESERVOIR IN STATUS Name of Dam Pyr'an?lid Dam NO. Dale of Inspection__ 895/15 Erosion rile to . . monitor .- . . slope I'boki'ng I?ft I I DWR1261 (rev. 10109) SheetI 3 of 4 INSPECTION OI- DAM AND RESERVOIR IN CERTIFIED STATUS Name ofDam Ey?lmid Darn No. 1?66 Date of Ins ion OQEE weir. DWR 1251 (rev. -1 mg) Sheet 4 STATE OF CALIFORNIA CALIFORNIA NATURAL RESOURCES AGENCY DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Pyramid Darn No. 1-66 County LOS Angeles Type of Dam Earth/Rock Type of Spillway Concrete weir and Open Channel Water is 2.4 feet below spillway crest and 29.4 feet below dam crest. Weather Conditions Sunny, clear, and windy Contacts Made See list Reason for inspection Maintenance Inspection and Board Inspection Important Observations, Recommendations or Actions Taken Consideration should be given to providing a means to inspect?s the newly installed sheet metal boxes do not allow for visual inspection. Conclusions From the known information and visual inspection, the dam, reservoir, and the appurtenances are judged safe for continued use. Observations and Comments Da_m The paved dam crest was found to be well aligned and in overall good condition. Other than typical asphalt cracking, no signs of distress were noted along crest road or the access road. Both the upstream and slopes showed no si ns of distress and they appeared stable, uniform, with no signs of instability noted. Th?were traversed; no signs of distress were noted and conditions appeared unchanged from what has been noted during previous inspections. Vegetation control was good and there were no discernable signs of rodent activity. Spillwav Emergency Spillwav: The emergency spillway entrance, ogee control section, and plunge pool were clear of any objectionable debris. The concrete ogee remains in satisfactory condition. The shotcreted shale bands in the spillway appear to be holding up well and appear unchanged from previous inspections. Control Spillway: During the inspection, the radial gate was slightiy cracked and releasing approximately 2 cfs. The concrete comprising the radial gate control structure, chute, and flip bucket appeared to be structurally sound and in good condition. The radial gate and its operating equipment appeared to be in good overali condition; the iongstanding crack on the left pier wall appeared unchanged from past inspections. The Plexiglas boxes previously used to protect- from the elements have been replaced by sheet metal boxes Photo 5). Consideration should be given to providing a means to visually inspect? without removing the boxes. Outlet appeared to be weil maintained and in cod 0 eratin condition? however, corrosion was beginning to be observed* The should be monitored and plans should be prepared to remove the corrosion and recoat affected areas. W88 walked and no signs of distress were noted. A large amount of vegetation -has been removed. I Inspected by 3.0. Jones?m A3 Photos taken? Yes N0 Date of inspection 11/18/14 cc for Owner/Book Date of Report 1/15/15 DWR 1261 (Rev. 10/09) Sheet 1 of 6 INSPECTION (1. DAM AND RESERVOIR IN .ED STATUS Name of Dam ?f??tid Dam No. 1-66 Date of Inspection 11/18/14 Observations and Comments Seegage The following table lists when the-gates were last cycled: cled @2ng (typically in service) Oct 23. 2014 Oct 23 2014 All Bolts removed and repla_oe_d.p_evc_29_1_3* No signs of seepage were noted on the face or along the abutment contacts. Seepage measurements were recorded as follows: Weir Location ?es etgpm? 2 Trickle Trickle Trickle The observed seepage was within historic limits and flowing clear. The instrumentation consists of 8 piezometers, 4 seepage points, 3 inolinometers, 38 survey monuments. 54 crack and joint pins. and three inclinometers. There are also 2 accelerometers, a precipitation gauge, and a reservoir stage gauge. The most recent instrumentation data was submitted on December 23, 2014 and covered the period of October 1, 2013 through September 30. 2014. The eight piezometers.? continue to follow past trends and do not indicate any detrimental trends. The reservoir does not vary in elevation much so it is difficult to tell how responsive the piezcmeters are to reservoir elevation; however. some of the piezorneters readings are affected by seasonal precipitation. Given the size of the dam, measured seepage is considered to be relatively low. Maximum toe seepage during the review period was ~18 (average ~62 gpm); toe seepage is very responsive to precipitation. ?seepage measurements on average were 1 gpm. While the inclinometers continue to be monitored, their data is no longer actively analyzed. The data will only be used to obtain before and after measurements following significant earthquakes. This is considered to be satisfactory as darn movements under static conditions have leveled off (very little or no year to year changes). Survey data shows that the settlement along the crest has not exceeded the design camber. Both vertical and horizontal movements vary little between yearly surveys but no adverse trends are noted. Crack pins used to monitor cracks along the crest roadway?are no longer monitored. Historically, these readings have shown littlelno movement and discontinuing their monitoring is not considered to be detrimental to the dam surveillance program. The data reviewed indicates that the dam and reservoir are performing in a satisfactory manner. The current instrumentation and monitoring schedule is considered adequate. Sheet_ 2 of 6 INSPECTION (J: DAM AND RESERVOIR IN CERTI. STATUS Name of Dam _Dam No. 436 Date of inspection _Qbiariajisana and Comma? - Contacts Jaime De Santiago. Joel Quintana. Bonnie Duelter. Mitch TylerT Dan Garcia, Amber Orloffand, Olivia Virgadamo (DWR). Jeff Bair, David Ford and Bob Wright Board Members) Vinh Tran (FERC) UWR1261 {re-moms); Sheet 3 of INSPECTION Or DAM AND RESERVOIR IN CERTI: STATUS Name of Dam Pyramid Dam No. 1?66 Date of Inspection 111?! 8H4 . -. 4 .- Photo 3 slope looking towards the left abutment along} tit-te- access toad. owmsm {rev.10l09) Sheet 4 of INSPECTION 0r DAM AND RESERVOIR IN CERTI. .ED STATUS Name of Dam Pyramid Darn No. Date of Inspection 8/14 Photo 4 Upstream face of the dam looking towards the right abutment. DWR1261 (rev.10f09) Sheet 5. 0f 5 INSPECTION 0r DAM AND RESERVOIR IN CERTI. .ED STATUS Name of Darn Pyramid Dam No. 1-65 DWR 1261 (rev. 10x09) Date of Inspection 11f18/14 Ln Photo 6 Emergency spillwey ogee. Sheet 60f STATE oF CALIFORNIA CALIFORNIA NATURAL nesouecss AGE DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Pyramid Dam No. 1-55 County LOS- Angeles Type or Darn Earthj?gck Type of Spiltway Concrete weir and Open Channel Water Is 4. r_feet below spillway crest and 31.5 feet below dam crest. Weather Conditions Sunny and clear Contacts Made See list__below Reason for Inspection Maintenangelnspection Important Observations. Recommendations or Actions Taken Future instrumentation submittals should expand upon why instrumentation data was not included (see inclinometers in the instrumentation section of this report). Conclusions From the known information and visual inspection. the darn, reservoir, and the appurtenances are judged safe for continued use. Observations and Comments gem The paved dam crest was walked and found to be well aligned and in overall good condition. The upstream slope showed no signs of distress and the riprap appeared to be in good condition. The slope appeared stable, uniform, and no signs of instability were noted. Other than typical asphalt cracking, no signs of distress were noted along access road located the slope bench. Vegetation control was good and there were no discernable signs of rodent activity. Th_were entered and fully traversed; no signs of distress were noted and conditions appear to be unchanged from what has been noted in previous inspection reports. Sgillway Emergency Sgillway: The emergency spillway entrance, ogee control section. and plunge pool were clear of any objectionable debris. The concrete ogee remains in satisfactory condition. The shotcreted shale bands in the spillway appear to be holding up well; the small tree growing at the base of the upper shotcreted band has not been removed as previously requested. Control Sgillway: During the inspection, the radial gate was cracked open for fish releases. The concrete comprising the radial gate control structure, chute. and flip bucket appeared to be structurally sound and in good condition. The radial gate and its operating equipment appeared to be in good overall condition. During the inspection I was informed that plans are in the works to replace the spillways? floating buoy line. Outlet Areas of concrete in the access tunnel continue show signs of surface deterioration utt IS IS not considered a darn safety issue. Gate?appeared to be well maintained and in ?ood Operating condition.- All valves were operated in presence during the ?31113 maintenance inspection. The ?was walked and no signs of distress were noted. Vegetation of the outlet tunnel is planned to be removed in the near future. Inspectect by Photos taken? Yes Ho_ Date of Inspection 3129? 3 cc for Owner/Book Date of Report 9117??) Ia owe 1251 (Rev. torus} Sheet 1 of INSPECTION i. DAM AND RESERVOIR IN .ED STATUS Name of Dam Pyrem?_ 7 [Jam No. 1-66 Date of inspection 8f29f13 Observations a_r_1_i:l_C_on_tn_i_ents Seegage No signs of seepage were noted on the face or along the abutment contacts. Seepage measurements were recorded as follows: See 4.5 Trickle (as 1) Twit?) 0.2 The observed seepage was within historic limits and flowing clear. The instrumentation consists of 8 piezometers, 4 seepage points, 3 inclinometers (water levels are also measured in the inclinometer casings), 38 survey monuments, 54 crack and joint pins. and three inclinometers. There are also 2 accelerometers. a precipitation gauge, and a reservoir stage gauge. The most recent instrumentation data was submitted on January 14, 2013 and covered the period of October 1, 2011 through September 30, 2012. The 8 piezometers are located through the darn crest and only monitor pore pressures Piezometers and show very little fluctua Ion uring the past ten years and do not appear responsive to reservoir elevation or precipitation. Piezometers P-26, P-EBD, P-27. and P-27D continue to show fluctuations associated with precipitation. While use of the piezometers data in evaluating the darn limited, no detrimental or developing conditions are noted. Seepage is monitored Excluding precipitation induced spikes (all seepage readings are influenced by precipitation), no increasing seepage trends are noted. There are 14 survey monuments along the centerline of the dam crest, 12 monuments along the shoulder, and 12 monuments on the face. No adverse trends are observed and the data shows that the settlement along the crest has not exceeded the design camber. Plots of data from these pins continue 0 ow no progressive movemen . There are 3 inclinometers? to the instrumentation data report, inclinometer data was reviewed but not included in the report due to uncertainties regarding the instrumentation. Additional information should be included in future submittals where data is not included. The data reviewed indicates that the dam and reservoir are performing in a satisfactory manner. The current instrumentation and monitoring schedule is considered adequate. own 1261 (rev. toros} Sheet 2 of 5 INSPECTION . DAM AND RESERVOIR IN STATUS Name of Dam _Pyramid Dam No. 1-55 Date of Inapection 3 Observations and Comments Jaime De Santiago, Joel Quintero. Amber Orloffand Don Walker (DWR). Gloria Wu Vinh Tran (FERC) Contacts Photo 1 slope taken from the entrance to the valve chamber. DWR 1261 (rev. tome) Sheet 3 of INSPECTION DAM AND RESERVOIR IN STATUS Name of Dam Pyramid Dam No. 1-66 Date of Inspection 8/2913 Photo 3 Brush near the exit to the outlet that is nlanned to be removedPhoto 4 Upper shotcreted shale band and small tree that still needs to be removed. Sheet 4 of INSPECTION Name of Dam Pyramid DAM AND RESERVOIR IN .ED STATUS Dam No. 1-66 Date of Inspection .. . . . Photo 5 Looking along the dam crest towards the right abutment. DWR1261 (rev. 1OIOQSheet 8l29l1 3 5 of STATE OF CALIFORNIA '4 I .- - CALIFORNIA NATURAL RESOURCES AGENCY ?l . DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Darn _Pyramid_d Dam No. __County Los _Angeles Type of Darn Earth Type of Spillway Concrete Weir and Open Channel Water is 27.1 feet above spillway crest and 30.9 feet below dam crest. The radial gate was closed Weather Conditions Moderate Contacts Made See list of participants at the end of this report Reason for Inspection Periodic Maintenance Inspection Important Observations. Recommendations or Actions Taken The objectionable vegetation growing on the embankment and in the spillway was removed as requested during the last inspection. Conclusions From the known information and visual inspection, the dam, reservoir. and the appurtenances are judged safe for continued use. Qbservations and Comments Eta?m The crest was well aligned, level, and in good condition. The asphalt road on the crest was in good condition. The riprrap covered upstream slope appeared uniform, stable, and normal. The slope was also stable and uniform. The bench on the slope was in satisfactory condition and the minor erosion nearthe midpoint will be filled with additional rock. The abutments and roins were stable. Vegetation and rodent control on the dam embankment was excellent. Thehremain relatively dry and in good condition. The drains appeared to be unobstructed and some were slowly dripping. There was evidence of a few more popeouts Sgillway The entrance, channel, and exit to both the overflow weir and gated weir were clear of objectionable debris and vegetation. The concrete for both spillways remain in satisfactory condition. The 45 degree stress crack at the left wall of the gated spillway trunnion appeared unchanged from previous inspections The a eared stable and in satisfactor condition. The radial gate was bumped open a few inches to maintain a stream release - The control spillway channel behind the radial gate was not walked due to the flow release down the channel. valves were full 0 erated durin this ins ection. - Outlet valve and all he valve was walked and remains in good condition. There was minor cavitation to the steel transition section from the constant releases through the-valves, but does not show any concerning signs of wear. Inspected by Joe Boyge l3 Photos taken? YES ND Date of Inspection 1/31/2013 Files in rt 3/14h?2013 own 1261 (Rev. mics) Sheet INSPECTION C. DAM AND RESERVOIR IN CERTEI. .ED STATUS Name of Dam Pyramid Darn No. 1-66 Date of inspection 1/31/2013 Observations and Comments Seepage There were no signs of seepage located on the slope, groins, ortoe of the dam. The weir readings had the following flows: FM Trickle Trickle 2 11.5 Flows were normal and within historical limits. The instrumentation for this dam consists of a reservoir gage, 8 piezometers, 4 seepage points, 38 survey monuments, 3 slope indicators (also monitored as observation wells), 2 accelerographs, and 24 crack and joint pins. The latest instrumentation data was dated March 19, 2012 covering the period of October 1, 2010 through September 30, 2011. There are 8 standpipe piezometers located in?the dam. Piezometers P22, P23, P24, and P25 continue to show constant trends that are unaffected from precipitation or reservoir levels. Piezometers P26, P26D, P27, and P27D are highly infiuenced by precipitation, but are not influenced by reservoir levels. The standpipe piezometers continue to show normal trends consistent with past data and are below the threshold levels developed by The seepage is monitored? All seepage points are highly influenced by precipitation and spike during peak storms. All seepage flows during the monitoring period were within historical readings and normal for this dam. Besides the typical spikes during peak rainfall, the seepage data remains low and shows no concerning trends or conditions. There are 14 crest monuments, 12 monuments along the shoulder, and 12 monuments along the bench. The iatest survey data shows maximum cumulative movements near the maximum section of the dam. There was a maximum cumulative settlements at crest monument 20?00 of 21.08 inches, at shoulder monument 19+90 of 36.8 inches, and at monument 2463 on the bench of 45.35 inches. Historical settlements have been greatest near the maximum section and negligible at the abutments which are ex ected. The settlement alon the crest has not exceeded the camber._ Maximum horizontal movements also occurred near the - maximum section with a cumulative maximum movement of 21 .61 inches- The data shows no adverse trends or conditions. The 3 slope indicators show displacements comparably similar to last year?s readings and show no signs of a shear zone. The 2 accelerometers had no data because there were no significant earthquakes during the monitoring period. Surveying the crack monitoring pins on the crest has been discontinued following the 2010 Part 12 Board Recommendations. Crest movements will be monitored usin the existing monuments. The crack monitoring pins?are still being monitored. The displacements of the monitoring pins?are negligible (<0.02 inches). The instrumentation data indicates the dam is performing satisfactorily and no new instrumentation is required at this time. Sheet 2 of 5 INSPECTION Ln? DAM AND RESERVOIR IN CERTI- IED STATUS Name of Darn Pyramid Dam No. 1-66 Date of Inspection Observations and Comments Other Participants for this inspection included: Don Walker Jaime DeSantiago (SFD) Amber Orloff (SFD) Joel Quintero (SFD) Wilfredo Castillo (SFD) Bonnie Dueoker (SFD) Hamid Eshraghi (SFD) The slope. Sheet 3 of INSPECTION Ln? DAM AND RESERVOIR IN CERTIMED STATUS Name of Dam Dam No. 1-56 Date of Inspection 'I/31i2013 (rely. 10/09) INSPECTION Ln? DAM AND RESERVOIR IN CERTI. IED STATUS _Darn No. 1?66 Name of Dam_ Pyramid Dale of Inspection__1 {31/201 3. DWR1261 (rev. 10/09) Sheet STATE OF CALIFORNIA CALIFORNIA NATURAL RESOURCES AGENCY DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Eyramid Dam No. 1-66 County LOS Angeles Type of Dam Rockfill Type of Spillway Concrete Weir and open channel Water Is feet below spillway crest and feet below dam crest. *Not recorded Weather Conditions Clear, mild, light Wind Contacts Made D. Walker, H. DeSantiago. J. lCluintero. A. Orloff Reason for Inspection Periodic Inspection Important Observations. Recommendations or Actions Taken Climbing crews were inspecting and cleaning the radial gate. Only one floor drain had any significant flow. Conclusions From the known information and the spillway is judged safe for continued use. Observations and Comments Sgillway I arrived at 9:00 am. and met with the above contacts at the spillway. We put on our fall protection gear and then a job hazard assessment briefing was conducted from 9:30 am. until 10:00 am. A local fire department crew was on site for belay duties and in the event that an injury occurred. A bulkhead had been installed across the spillway approach and a climbing team was in the process of inspecting and cleaning the radial gate. At 10:15 am. we entered the spillway and proceeded with the inspection. There were small flows from the weep holes at the upstream end of the channel and a flow of about 3 from the center floor drain at the upstream end. Light vegetation was noted in the upstream vertical joint on the left side. The remainder of the weep holes and joints were tight and dry. The floor drains had standing water from leakage past the gate but no flows other than what was already noted. Both walls were walked to within 50 feet of where the channel begins to descend downslope and no evidence of instability or distress was noted. Inspected by R. G. Draeger Photos taken? Yes No Date of Inspection cc for Book. Date of Report 11'07?120?12 t. Irv?e Sheet 1 5 sh INSPECTION DAM AND RESERVOIR IN CER STATUS Name of Dam Pyramid Daano. 1-66 Date of Inspection August 29, 2012 Observations and Comments DWR 1261 (rev. 1UIUQ) View of left channel wall. Note light vegetation in lower weepholes. Sheet 2 of INSPECTION DAM AND RESERVOIR IN IED STATUS Name of Darn Pyramid Darn No. 1456 Date of Inspection August 29, 2012 Observations and Comments View of right channel wall. DWR 1261 (rev. 10/09) Sheet 3 of INSPECTION DAM AND RESERVOIR IN CER IED STATUS Name of Dam Pyramid Dam No. 1-66 Date of Inspection August 29, 2012 Observations and Comments View of typical minor seepage from upstream joints and weepholes. Sheet 4 of INSPECTION AND RESERVOIR IN CER IED STATUS Name of DamPyramid Dam No. 1-66 Date of Inspection August 29, 2012 Obseryatiqp?nd Comments ,n?iwill" -. HF (-3- (Q "33. - i I. .yAx'y. ?lf?'lDWR 1251 (rev. 10109) Sheet 5 of