STATE OF CALIFORNIA I CALIFORNIA NATURAL RESOURCES AGENCY DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Cedar Springs Darn No. 1-63 County San Bernardino Type of Dam Earth Type of Spillway Concrete weir and lined Open channel Water is 6.1 feet DOIOW spillway crest and 29.1 feet darn crest. Weather Conditions ?arm and sunny Contacts Made See list Of participants at the end of this report__ Reason for Inspection Periodic Maintenance Inspection Im ortant Observations Recommendations or Actions Taken - The transverse cracks in the channel near the grade breaks need to be sealed. . The void at base of the left spillway wall located at the joint immediately upstream of the access ladder needs to be cleaned and patched. Areas of prior patchwork appear to be failing and will need re lacement. Gates 1, 3, and 5 were all fully cycled 100% during the inspection. A couple of drains?appeared to be about 90% obstructed and will need to be Cleared. Conclusions From the known information and visuel inspection, the dam, 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, level, and in good condition- Cracking to the curb and asphalt at the right abutment appear unchanged with no signs of further cracking or additional movement. The visible portion Of the rip-rap covered upstream slope was stable, uniform, and in good condition. The rip-rap covered slope was also in good condition with no signs of distress or instability. Vegetation control was excellent. Rodent control appeared satisfactory with bait stations installed on the slope and toe. None Of the bait traps appeared to be stocked. Sgillway The approach. weir. 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 void at base of the left spillway well located at the joint immediately upstream of the access ladder needs to be cleaned and patched. Areas of prior patchwork appear to be failing and will need replacement. Several Of the drains that enter through the spillway walls are misaligned, but do not drain often. and do not pose a safety concern to the walls at this time. The transverse cracking in the spillway invert slabs are greatest at the grade breaks and need to be sealed. Outlet was inspected and found to remain in good condition. Most of the drains and weep holes were flowing clear and unobstructed. The outlet -was also inspected, which remains in normal condition. The drains appeared to be functioning correctly and flowing clear. A couple of drains appeared to be about 90% obstructed and will need to be cleared. Inspected by JOE: Boyde /?il33 i'hrj Photos taken? res _x No Date of Inspection ooze/2017 91;; If cc for Date of Report 04/26/2017 DWR 1251 (Rev. 10(09) Sheet 1 Of 6 E351 INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Darn Cedar Springs Dam No. 1.63 Date of Inspection 04/20/2017 Observations and Comments Seepage Other DWR 1261 At the outtet - there are?gates? and valve. - gates 1, 3, and 5 were all fully cycled 100% during the inspection. The va ve an -gates 2 and 4 were fully operated earlier in the day to provide lock out tag out clearance for entering- We last saw the-valve and - gates 2 and 4 fully operated during the July 13, 2016 inspection. There were no signs of visible seepage located on the slope or at the groins. The toe area seepage (measured at Weir F) was flowing clear and vegetation was adequately cleared. The seepage readings were recorded as: Weir Reading Flow A 0.175? 89 0.12? 11.5 0.17? 28.7 0.19? 3.6 0.23? 16.9 013? 2.8 0.05? 2.9 The seepage readings taken were normal for the reservoir level. Monitored instrumentation for this dam consists of 22 piezometers, 17 survey monuments, 87 monitoring pins, 7 seepage points, 3 accelerometers, and rain gauge. The latest instrumentation report was dated March 29, 2016 and includes data up through September 30, 2015 for Cedar Springs Dam. The data was reviewed and commented on in the July 3, 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 Olivia Virgadamo, Domingo Cardoza, Nicholas George SFD: Joseph Salazar, Maurice Rubio, Marc Sparks, Hamid Eshraghi (rev. 10/09) Sheet 2 of 6 Name of Dam INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Cedar Springs Dam No. 1-63 Date of Inspection 04/20/2017 Ila-Infh.? ?19 . a. 1' . n.1t The spiilway weir was in satisfactory Izoditioh. Shaat 3 of INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS NameofDan1_ Cedar Springs DamNo. 1?63 Date of Inspection DWR1261 (rev.10.?09) 311881 01' i INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Darn Cedar Springs Dam No. 1-63 Date of Inspection 04120l2017 Transverse cracking in the epiliway channel invert at the grade break needs to be sealed. i More transverse cracking that needs to be repaired. DWR1261(rev.10l09} Sheet 5 of INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Dam No. 1-63 Date of Inspection DWR1261 (re-v.10l09) Sheet_ 6 of STATE OF CALIFORNIA tv CALIFORNIA NATURAL RESOURCES AGENCY DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS It i. Name oi Dam Cedar Springs Dam No. 1?63 County San ?ernardino Type of Dam ?rth/Rock Type of Spillway Concrete Lined Open (Shawl Water is 5 feet Below spillway crest and 28 feet Below darn crest. ewe?3350 Weather Conditions Clear, and WinY.__ Contacts Made ?ee Below Reason for Inspection Periodic Maintenance Inspection Important Observations. Recommendations or Actions Taken Investigate and remediate if necessary, the potential for exhaust from the standby emergency generator entering-chamber. Conclusions From the known information and visual inspection, the dam, reservoir, and the appurtenances are judged safe for continued use. Observations and C_omments Da_rn The paved dam crest appeared to be in good condition, and was found to be level and well aligned. The visible portion of the upstream slope showed no signs of instability; however, disturbance of the upstream riprap rock by the public continues to be issue. The Slopes appeared uniform with no signs of instability or distress noted. The abutments appeared to be in good contact with the dam; caverns observed at the upstream left abutment during pervious inspections had been filled in with large rock to prevent progressive erosion. The toe area where seepage is monitored was free of vegetation and seepage only visible in the seepage collection ditches. Vegetation control overall was very good and only minimal rodent activity was observed. Spillway The spillway approach, control section, concrete channel, and stilling basin were clear of objectionable debris. The log boom was in-place. The Spillway concrete appeared to be in generally good condition, structurally sound, and unchanged from previous inspections. Outlet The ui ll maintained. The all appeared to be in good con Hon. ollowing table lists the gates cycled during this inspection: cled 100% Opened but not closed 100% 100% 100% It was discussed during the inspection that Gates #1 and #3 should be cled durin the next inSpection Inspected by 8-0. Photos taken? YES N0 Date of Inspection 7/1 3115 Ot/t?h? CC: for OWUEITBODR Date of Report 9/13/16 DWR1261 (Rev mics) Sheet 1 of 6 INSPECTION Or DAM AND RESERVOIR IN CERTII STATUS Name of Darn Cedar Springs Dam No. 1?63 Date of Inspection 773/18 Qbservations and Comments Seepage Contacts There were no signs of seepage on the face or along the groins. Seepage is monitored at several locations and were recorded as follows: Site A - ~6 Site 8 ~10 Site 0 ~15 Site - Not Measured Site 5 to 10 (Estimated) Site ~2 Site - *2 Seepage at the above locations was flowing clear and within historic norms. Currently monitored instrumentation at this dam consists of 17 survey monuments, 22 pneumatic piezometers. 7 seepage points and 87 monitoring pins. There are also three accelerometers. one seismometer, three rain gauges, and a gauge to monitor reservoir elevation. The most recent instrumentation report is dated December 2015 and covers the period of October 1, 2014 through September 30, 2015. The piezometer pore pressure data indicates that the core, filters, and drains are functioning as designed. Readings from the piezometers have been fairly stable, indicate no adverse conditions, and suggest a reasonable phreatic surface through the dam. No concerning or developing conditions are noted. Seepage readings continue to be consistent with past trends with the exception that due to draught conditions the readings have been lower on average. Toe seepage, which has a historical average reading of 47 has only averaged 22 during the period covered by this report; all other seepage reading show similar reductions during the report period. The most recent survey data provided was from a December 1, 2014 survey. Plots of the data show little, or no, progressive vertical or horizontal movement alon the dam crest. A maximum comulative settlement of 10? is observed at Monument with little or no incremental movement in recent years maximum horizontal movement of is a so 0 served near the dams maximum section- with little change between yearly surveys. No alarming trends are noted, the movements observed are reasonable, and the dam is deforming as expected. No data for the monitoring pins was collected during the reporting period. They are surveyed every three years with the most recent occurring December 2013. Past surveys have shown no concerning movements. The data reviewed indicates that the dam and reservoir are performing in a satisfactory manner. The current instrumentation and monitoring schedule is considered adequate. Arthur Reis (FERC). Bonnie Duecker, Joseph Salazar, Victoria Valentine. John Robinson, Jaime DeSantiago, Mike Barrera, Maurice Rubio, Joseph Cruz, David Panec, Amber Haddox, Richard Sandoval, Marcos Moreno Jr., and Raymond Santiago (DWR). DWR12?1trev.10l09) Sheet 2 of 6 INSPECTION Ln- DAM AND RESERVOIR IN STATUS Name of Dam Cedar Springs Dam No. 1-63 Date of Inspection 7(3/16 face and are looking towards the right abutment. 'Photo ?1 DWR1261(rev.1Uf09) Sheet 3 of 6 INSPECTION (Jr DAM AND RESERVOIR IN STATUS Name of Dam Cedar Springs Dam No. 1-63 Date of Inspection 713M 6 I I Iw?ivw-?toe area. Photo a: Photo 4 Upstream left abutment area where caverns have been filled with riprap. Sheet 4 of INSPECTION DAM AND RESERVOIR IN STATUS Name of Darn Cedar Springs Darn No. 1-63 Date of Inspection it?. in Photo 6 4 Spillway exit was clear and free of detrimental debris. DWR1261 Sheet of i INSPECTION (Jr DAM AND RESERVOIR IN CERTII IED STATUS Name ofDam Dam No. 1-53 Date of Inspection 7/3/16 co. 3 STATE oF in CALIFORNIA NATURAL aesounces AGENCY DEPARTMENT OF WATER RESOURCES DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Darn Cedar Springs Dam No. 1-63 County San Bernardino Type of Dam Type ofspillway ,goncrete Lined Open Channel Water is 2.3 feet BEIOW spillway crest and 25.3 feet BEIOW darn crest. - 3352.7' Weather Conditions Hot. clear, and windy. Contacts Made dainge?antiago. Maurice Rublo, DavidSarkisia'ny Nic George, Domingo Cardoza, and others. Reason for Inspection Periodic Maintenance Inspection important Observations. Recommendations or Actions Taken The Division of Operations and Maintenance (Dali/l) is working to close off public access to the darn. This is highly encouraged as sheltersfwindbreaks along the upstream slope continua to be created by the public using the riprap rock. Conclusions From the known information and visual inspection, the darn, reservoir, and the appurtenances arejudged safe for continued use. Obserlrations and Comments D_an1 The paved dam crest was found to be level, well aligned, and in good condition. Shelters! windbreaks along the upstream slope continue to be created by the public using the riprap rock and restoring the riprap continues to be ongoing maintenance issue (Photos 2 8t 3). It was reported that is working to close off public access to the dam; this is highly encouraged. The slopes appeared uniform with no signs of instability or distress noted. The grains were walked and the dam found to be in good contact with the abutments. Vegetation control was very good. Bait stations were found to be full and no rodent activity was evident; rodent control efforts should continue. Areas of erosion at the left abutment are reportedly scheduled to be filled with dumped rock to prevent progressive erosion (Photo 7). Sgillway The spillway approach, control section. concrete channel, and stilling basin were clear of objectionable debris (Photos 8 8t 9). The spillway was walked and the concrete appeared to be in generally good condition and structurally sound; there are a few concrete spalls that need to be patched (Photos 10 8t 11). Outlet The four_ gates were not cycled during this inspection but were cycled 100% during the March 2013 inspection. Arrangements should be made to cycle these gates during the next ins action. The ui ment for the ates and valves a cared to be well maintained. all appeared to be in good condition. For stream releases, there is a gate? valve The valve of the gate) had been removed for needed maintenance (Photo 11). There had been significant leakage from this valve noted during past inspection. Seegage There were no signs of seepage on the face or along the groins. Sespage is monitored at several locations and were recorded as follows: Ms?) . Inspected by 50. Jones Photos taken? Yes No Date of Inspection 8t27I15 cc for Owner/Book Date of Report 19(23/15 Ti?l own 1251 (av-torus) Sheet 1 of 8 INSPECTION OF DAM AND RESERVOIR IN STATUS NameofDam Cedar Springs Darn No. 1-63 Date of Inspection 8/27f15 Observations and Comments Instr. DWR 1261 - 8.9 Site A Site Ei - 11.4 Site 0 9-5 9pm Site Not Measured Site ?19.7 Site 0.8 Site 2.9 Seepage at the above locations was flowing clear and within historic norms. Currently monitored instrumentation at this dam consists of 17 survey monuments, 22 pneumatic piezometers, 7 seepage points and 87 monitoring pins. There are also three accelerometers, one seismometer, three rain gauges, and a gaUQe to monitor reservoir elevation. The most recent instrumentation data was submitted on December 23, 2014 and covered the period of October 1. 2013 through September 30, 2014. The data was reviewed as part of the previous inspection report. . 5' it} hoto1? Upstream face and crest looking towards the left abutment. (rev. 10mg) Sheet 2 of INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Cedar Springs Darn No- 1-63 Date of Inspection 8/27715 Area of Disturbad Rlprap Area of Disturbed Riprap DWR1261(rev.10i09) Sheet 3 of INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Cedar Springs Darn No. 1-63 Date of Inapection $27715 I I Eli?- I1 - . . . 11-5-31; toe and seepage collectio trenches. WW. Photo 5 Looking at the Sheet 4 of INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name ofDarn Cedar Springs Dam No. 1-53 Date of Inspection '4 .. Photo 6 - slope looking towards the right abutment92.4154 mis?t??! I Photo 7 Areas at the leftabu'tment to be filled dumped rook prevent progressive erosion. Sheet 5 of INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Cedar Spri?gs Darn No. 1-63 Data of Inspection 3/27/15 Photo 8 Spillway looking upstream towards the ages weir. HhotQ Iookng DWR 1261 (rev. 10I09) Sheet 6 of INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name ofDam Cedar Springs Dam No. 1-53 Date of Inspection-? -. 8/27/15 Photo 10 Concrete epall on the right epillway wall of the ogee weir. Photo 11 Concrete epall at the epillway left wall near the access ladder. DWR 1251 (rev. 10mg) Sheet 7 of STATE OF CALIFORNIA [:53 II CALIFORNIA NATURAL RESOURCES AGENCY . . . . DEPARTMENT OF WATER RESOURCES I DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Cedar Springs Darn No. 1-63 County San Bernardino Type of Dam Eartthock Type or Spiilway Concrete Lined Open Channel Water is 5 feet Below crest and 28 feet BBIOW dam crest. RWS - 3350' Weather Conditions Sunny, clear and windy. Contacts Made See list below Reason for Inspection Maintenance and Board Inspection Important Observations. Recommendations or Actions Taken None. Conclusions From the known information and visual inspection, the dam, reservoir, and the appurtenances are judged safe for continued use. Observations and Comments Dam The paved dam crest was walked and found to be level, well aligned, and in good condition. Both upstream and slopes appeared uniform with no signs of instability or distress noted. Additional riprap has been placed in the area of the upstream right groin to repair damage caused by public access and beaching (Photo 1). There were a few sheltersrwindbreaks along the upstream slope that the public has created using the riprap rock; removing the shelters and restoring the riprap continues to be ongoing maintenance issue. The groins- and the dam found to be in good contact with the abutments. Vegetation control was very good. Bait stations were found to be full but some rodent activity was evident; rodent control efforts should continue. A cavern at the left abutment is to be filled with riprap to prevent progressive erosion (Photo environmental permitting has held up this work. The erosion observed is not considered to be a darn safety problem but needs to be addressed. Sgillway The spillway approach, control section, concrete channel, and stilling basin were clear of any objectionable debris. The spillway?and the concrete appeared to be in good condition and structurally sound. Outlet The outlet consist of gates, a gate, and a-cone valve. -gate were not cycled during this inspection but were cycled 100% unng preVI ction. The- equipment for the gates and valves appeared to be well maintained. The* ?also appeared to be in good condition. The W0 hydrogen sulfide concerns (elevated levels had been recently noted by personnel)- Seegage There were no signs of seepage on the face or along the groins. Seepage is monitored at several locations and were recorded as follows: Site A Site 8.9 -12.9 Site 23.? Inspected by 8.0. Jones Photos taken? Yes No Date of Inspection 11/20/14 so for Owner/Book Date of Report ?21/15 own 1261 (Rev. 10/09) Sheet 1 at 5 INSPECTIOP DAM AND RESERVOIR IN CElx .FIED STATUS Name of Dam Cedar Springs Dam No. 1.53 :1 u?I? i. Contacts Observations and Comments Date of Inspection '1 1/20i14 Site ?4 Site 16 Site 2.3 Site Seepage at the above location was flowing clear and the measured readings are within historic norms. The drainage-was inspected; 2.5 cubic feet of material that had accumulated upstream of Weir had been reportedly removed two weeks previous. The source of the material is likely spoil material dumped against the dam along the left toe. Some newireoccurring wet areas were noted on the left abutment. st of the illwa and away from the consideration should be given to cleaning out the drain& to see if this has any effect on the wet areas. Currently monitored instrumentation at this dam consists of 1? survey monuments, 22 pneumatic piezometers, 7 seepage points and 87 monitoring pins. There are also three accelerometers, one seismometer, three rain gauges, and a gauge to monitor reservoir elevation. The most recent instrumentation data was submitted on December 23, 2014 and covered the period of October 1, 2013 through September 30, 2014. Pore pressures in the dam and foundation are monitored by 22 gas piezometers (most of these piezometers are located_. The piezometers data indicates that the filters and drains are functioning as designed. While some of the core piezometers show slight increasing or decreasing trends, during the past 10 years, readings from the piezometers have been fairly stable and no adverse conditions are noted. The most recent survey data provided was from a December 5, 2013 survey. Plots of the data show little, or no, progressive vertical or horizontal movement along the dam crest. No alarming trends are noted and the data indicates that the dam is deforming as expected. Seepage readings continue to be fairly consistent with past trends. Toe seepage, which averages around 25 gpm, shows a slight decreasing trend which likely due to the lack of significant yearly precipitation. No data for the monitoring pins was collected during the reporting period. They were to be survey in December 2014 and the data provided in the next instrumentation submittal. The data reviewed indicates that the dam and reservoir are performing in a satisfactory manner. The current instrumentation and monitoring schedule is considered adequate. Jaime De Santiago, Bonnie Dueker, Maurice Rubia, Mitch Tyler, Domingo Cardoza, Dllvia Virgadamo (DWR). Jeff Bair, David Ford, and Bob Wright (FERCIDSR Board Members) Vinh Tran (FERC) DWR 1261 (rev. toms} Sheet 2 of 5 INSPECTIOI DAM AND RESERVOIR IN STATUS Name of [Item Cedar Springs Darn No. 1-63 1 20/ 1 4 Date of Inspection - I mutt-*- H't.1 I 119? anal-?1??. It.- -3 . .. .. Eta-Mun. an- . Photo 1 Upstream face and right grcin. Not the eltgh cf the newly placed riprap. fly lighter - - l5!" 3:19 r- Phetez Locking tcwradethe right abutment at the upstream face and ereet. Sheet 3 DWR 1251 (rev. 101'09) cf DAM AND IN . STATUS Name of Dam Cedar Springs Dam No, 1-63 Date of Inspection 1 1I20I14 3% 45 Photo 3? Looking at the toe seepage ootleotion system Photo 4 Typical rodent bait station Sheet 4 DWR1251 (rev. toms) INSPECTIOF DAM AND RESERVOIR IN . IFIED STATUS 1?63 Name of Dem _Cedar Springs Dam No. Date Photo 6 Looking toward left abutment at the upstream slopefhl?ot the oe?iiern that is to be filled with riprep to prevent progressive erosion. DWR1261 (rev.10!09) Sheet 5 a of or CALIFORNIA CALIFORNIA NATURAL RESOURCES AGENCY I: 1? a: - DEPARTMENT OF WATER RESOURCES . .. - DIVISION OF SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Darn ggdar Springs Dam No. 1?63 County San Bernardino Type of Darn Earth Type of Spillway Concrete weir and lined open channel Water is 3-2 feet below spilIWay crest and 26.2 feet below darn crest. Weather Conditions Warm and sunny Contacts Made See list of participants at the end of this report Reason for Inspection Periodic Maintenance Inspection lm ortant Observations Recommendations or Actions Taken - Rip-rap at the upstream slope near the right abutment has been added to restore the slope. hick vegetation at the lower right groin and right toe area was requested to be cleared. . Gates? were all fully cycled 100% during the 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 asphalt road on the crest of the darn remains well aligned. level. and in good condition. Cracking to the curb and asphalt at the right abutment appear unchanged with no signs of further cracking or additional movement. The visible portion of the rip~rap covered upstream slope was stable, uniform, and in good condition. Rip-rap at the upstream slope near the right abutment has been added to restore the slope. The rip-rap covered slope was also in good condition with no signs of distress or instability. The cavern/erosion underneath the access road that leads down to the reservoir at the far left abutment remains but some of the eroded area encroaching on to the asphalt road has been repaired. This is not a dam safety problem at this time. Vegetation control was very good and thick vegetation was requested to be removed along the right toe area. Rodent control appeared satisfactory with bait stations installed on the slope and toe. peaked inside a few of the bait traps and they were fully stocked. The longstanding surface void at the too near the left groin area has been filled in with pea gravel and shows no sign of further settlement. Sgillway The approach, weir, channel, and exit to the spillway were open and clear. The concrete that comprises the spillway remains in good condition. The joints appeared to be well aligned and in normal condition. ?was inspected and found to remain in good condition. Most of the drains and weep holes? were flowing clear and unobstructed. The outlet -was also inspected. which rem-n? utlet was significantly less than past in one. ectl - I cycled 100% durini the insiection. Thehvalve was cycled 100% during the April 2012 inspection. was traversed and found to remain in good condition. Inspected by Joe Boyce 3) S/?z/?wj Photostaken? YES N0 Date 3_I2_3f_2pl3 g?l?a [242015 CD for Files Date of Report era?s/?631 3 ?ax DWR1251 (Rev.10r09) Sheet, 1 of "ff-.5 Name of Dam Cedar Springs INSPECTION. DAM AND RESERVOIR IN CERCI ED STATUS 1?63 Darn No. 3/28/2013 Date of Inspection Observations and Comments Seepage DWR 1261 (rev. 10/09) There were no si ns of visible see age located on the slope or at the groins. The toe area seepagH was flowing clear and vegetation was adequately cleared. The seepage readings were recor ed as: Weir Reading Flow A Not Read - Not Read - 0.14? 23.7 0.22? 5.6 0.25? 20.7 Not Read - Not Read - Weirs A G, and were not read because _a warning sign was posted indicating insufficient air due to a broken fan. The seepage readings taken were normal and within historical records. The instrumentation for this dam consists of 28 piezometers, 32 survey monuments, 48 gallery/outlet pins, 81 spillway pins, 7 seepage points, 4 accelerometers, and rain gauge. The latest instrumentation report was received on January 23, 2013 and includes data up through September 30, 2012 for Cedar Springs Dam. There are 28 gas piezometers at this dam, 3 have been abandoned (GP1, GP2, GP3), and 1 maifunctioned (GP13) during the monitoring period. The piezometers located in the upstream foundation track reservoir levels closely and normally. The piezometers in the core historically show a slight decreasing trend and continue to do so in the current instrumentation report. The piezometers located in the shell and foundation are relatively constant showing low levels. This indicates that the drains and grout curtain are working as designed. The phreatic surface through the embankment remains lower than the design level and presents no concerns to dam safety. There are a total of 32 survey monuments: 17 monuments are located on the crest, and 25 monuments are located on the upstream slope that are typically under water and not read. The survey data shows typical small movements during the monitoring period. The crest monuments show a very slight settlement comparing the most recent survey performed in 2011 to the prior survey performed in 2010 that was about 0.2 inches or smaller. The lar est cumulative vertical movement since construction has been a settlement of 10 inchesh which has leveled off. Horizontal movements also remain small (under Vi inch) and show no concerning trends or conditions. The pins show no alarming trends or movements with a sli ht 0.08 inch heave at the No. 1 fault since construction (1971). The majority ofthe pin have settled up to 0.2 inches since 1971. The gap between the pins (horizontai movement) at the No. 1 fault (Station 24+46) is 0.04 inches. It was reported that the spillway monitoring was on standby and the monitoring will resume if visual inspections detect movement or cracking of concrete. There were no concerning movements or Sheet of 5 INSPECTION DAM AND RESERVOIR IN CER- IEI STATUS Name of Dam Cedar Springs Dam No. 1-63 Date of Inspection 3/28/2013 Observations and Comments cracking detected at the spillway. The seepage for the monitoring period was lower than usual. All the seepage readings were normal for this dam. The total seepage ranged from 25.5 to 269.3 during the monitoring period. The historical maximum total seepage is 877 gpm. The instrumentation at this reservoir indicates that the dam is performing in a satisfactory manner and no new instrumentation is needed at this time. Other The following personnel participated during the inspection: Domingo Cardoza, Vanesa Morones SFD: Jaime Desantiago, Maurice Rubio, Gene Bueil, Jeff Winchester Sheet 3 of 5 INSPECTION Name of Dam Cedar Springs DAM AND RESERVOIR IN ED STATUS Dam No. 1-63 DWR1261 (rev. IUIUQ) Date of Inspection Sheet 4 of INSPECTION DAM AND RESERVOIR IN ED STATUS Name Of DEIITI Cedar Dam No, 1-63 Date of Inspection 3123(201 3 The spillway was open and clear. DWR1261 [rev.10!09) Sheet 5_ of 5 STATE OF CALIFORNIA CALIFORNIA NATURAL RESOURCES AGENCY DEPARTMENT or WATER RESOURCES DIVISION or SAFETY OF DAMS INSPECTION OF DAM AND RESERVOIR IN CERTIFIED STATUS Name of Dam Cedar Springs Dam No. 1-63 County Riverside Type of Dam Earth Type of Spillway Concrete weir and lined open channel Water is 2.1 feet below spiilway crest and 25.1 feet darn crest. Weather Conditions Windy Contacts Made See list of participants at the end of this report Reason for InSpecticn Periodic Maintenance Inspection Important Observations, Recommendations or Actions Taken it was reported that a program to restore rip-rap at bare and beaching areas at the upstream Slope near the right abutment is anticipated in the near future. The erosion at the far left abutment at the access road that slopes down into the reservoir will also be repaired. Conclusions From the known information and visual inspection. the dam, reservoir. and the appurtenances are judged safe for continued use. Observations and Comments D_an1 The asphalt road on the crest of the dam remains well aligned. level, and in good condition. Cracking to the curb and asphalt at the right abutment appear unchanged with no signs of fresh cracks or additional movement. The visible portion of the rip-rap covered upstream slope was stable. uniform, and in good condition. The reservoir level was high (El. 3352.9') and covered the beaching of rip-rap on the upstream slope nearthe right abutment. Along the upstream right groin, people who have visited for fishing/recreation have moved the riprap on the dam creating a path for access to the water. It was reported that additional rip-rap will be restored to bare areas of the slope and added rip-rap in the beaching areas. The cavernl'erosion underneath the access road that leads down to the reservoir at the far left abutment will also be repaired. The rip-rap covered slope was also in good condition with no signs of distress or instability. Vegetation control was excellent. There was little rodent activity detected during the inspection. Bait stations are installed on the slope and toe, the bait stations i looked inside were empty and need to be re-stocked. A new rodent abatement program was established in July 2011. It was reported that more bait will be added in the upcoming months when the weather becomes hotter and rodents seek shelter in the rip-rap. Both abutments and groins were stable and in satisfactory condition. The longstanding hole at the toe near the left groin area has been filled in with pea gravel and shows no sign of further settlement. Spillway The approach, weir, channel, and exit to the spillway were adequately clear of debris. The concrete that comprises the spillway remains sound and in good condition. The joints appeared to be satisfactorily aligned and in normal condition. There were no signs of any distress or extreme cracking to warrant any safety issues. Inspected by JOE Boycia. ?925/3 3/29: 2 Photos taken? Yes N0 Date of Inspection 4123153012 52/251]; so for Files Data of Report 5/11/2012 fj? J. fir-tr- DWR1251 (Rev.10!09] Sheet 1 of 1?3 INSPECTION . IAM AND RESERVOIR IN STATUS NameofDam Cedar Springs Dam No. 1-63 Date of Inspection 4/23/2012 Observations and Comments Outlet Seepage was inspected and found to remain in good condition. Most of the drains and weep hole- appeared to be flowing clear and unobstructed. The _was also inspected, which remains in good condition and a eared normal. The drains a eared to be functionin correctl and flowin clear. The amount of water leaking from the was significantly less than durin last ins ection in 2009. were cycled 100% during the inspectio gates and the-valve were cycled 100% during the February 2010 inspection. The valve operated satisfactoril durin that ins ection with no difficulties encountered. The- -was walked& and found to remain in good condition. There were no si ns of visible seepage located on the slope or at the groins. The toe area seepaghwas flowing clear and vegetation was adequately cleared. The seepage readings were recorded as: All the Weir Reading Flow A 0.20' 13.5 0.14? 14.4 0.18? 31.4 0.19? 3.9 0.27? 32.0 014? 3.4 0.09? 7.3 I Seepage readings were normal and within historical records. There was some sandy material near This material comes from 3 oil material placed This is normal during construction and is monitored by The instrumentation for this darn consists of 28 piezometers, 17 survey monuments, 7 seepage points, 2 accelerographs, and rain gauge. The latest instrumentation report was received on January 30, 2012 and includes data through September 30, 2011. The piezometers located in the upstream foundation track reservoir levels closely and normally. The piezometers in the core historically show a slight decreasing trend and relatively constant low levels for the piezometers iocated in the shell and foundation. This indicates that the drains and grout curtain are working as designed. The phreatic surface through the embankment remains lower than design levels and presents no concerns to dam safety. The survey data shows typical small movements during the monitoring period. The crest monuments show a very slight settlement (2010 survey) compared to the prior 2006 survey that was about 0.1 inches or smaller. The lar est vertical movement since construction has been a settlement of 9.9 inches? Horizontal movements also remain small (under 1A. inch) and show no concerning trends or conditions. The pin?show no alarming trends or movements with a slight 0.04 inch heave at the N0. 1 fault since construction (1971). The majority of the pins? have settled up to 0.2 inches since 1971. The gap between the pins (horizontal movement) has increased approximately 0.12 inches since 1971. Sheet 2 of 3 INSPECTION DAM ANI RESERVOIR IN IEI STATUS Name of Dam Cedar Springs Dam No. 1?63 Date of Inspection 4/23/2012 Observations and Comments Instr. Seepage data remains within historical records and spikes in seepage levels correspond to heavy precipitation events. The instrumentation at this reservoir indicates that the dam is performing in a satisfactory manner and no new instrumentation is needed at this time. The following personnel participated in the inspection: Don Walker, Domingo Cardoza, Vanesa Morones SFD: Maurice Rubio Jr., Jaime Desantiago, John Robinson, Hamid Eshraghi, Bonnie Duecker . Sheet 3 of 3