2003-07-29_HYDROLOGY - M1977493

• Permit No: M1977493
• IBM Index Class Name: HYDROLOGY
• Doc Date: 7/29/2003
• Doc Name: Robinson Dam
• From: DWR
• To: Climax
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

DAM NAME: ROBINSON
W
U �
ZQ
Zw
LU cc.
1- 0
Z
QQ
O)
J2
O
E-
a
2
• O
U
PROBLEMS NOTED: J(60 NONE ❑ (61) ACCESS ROAD NEEDS MAINTENANCE ❑ (62) CATTLE DAMAGE
0(63) BRUSH ON UPSTREAM SLOPE, CREST, DOWNSTREAM SLOPE, TOE 0(64) TREES ON UPSTREAM SLOPE, CREST, DOWNSTREAM SLOPE, TOE
J(67) GATE AND OPERATING MECHANISM NEED MAINTENANCE 0(68) OTHER
Usual rodent activity in area at the toe of the downstream slope between the spillway and maximum
section of dam. See page 3.
0 (71) SATISFACTORY
O
p, y 01 4
o 0 p
N y • 0 5 0
Go . D a
a
OA 0 N , s
, ▪ 6 2
d v O O E
o • b u. N O
O d 4 BIZ
N 01 O
U N 4 E C
N -C S q a
v 4
0 . E
d 0 - y
N N o. .a--•
E O o O
v V E .E
CI e y N
C r
O
11 2
YI a O
. � • .
d % v W Y
< Ito
'.i.
W N= V ••
y•
ip
to 0 N=
Go H .c
• , o 3O
Engineer's
Signature
EXISTING INSTRUMENTATION FOUND 7(110) NONE i [1(111) GAGE ROD L(112) PIEZOMETERS *(113) SEEPAGE WEIRS / FLUMES
(114) SURVEY MONUMENTS [ (115) OTHER
MONITORING OF INSTRUMENTATION C] (116) NO *(117) YES PERIODIC INSPECTIONS BY: � / (118) OWNER *(119 ENGINEER
Monuments need to be resurveyed and report submitted to our office.
(65) RODENT ACTIVITY ON UPSTREAM SLOPE, CREST, DOWNSTREAM SLOPE mg ❑ (66) DETERIORATED CONCRETE - FACING, OUTLET SPILLWAY
Dam is in satisfactory condition, but unknown condition of old outlet, with its intake buried in silt, has been
neglected for many years warrants conditionally satisfactory rating. Also condition of siphon is unknown.
Based on this Safety Inspection and recent file review, the overall condition is determined to be:
MAINTENANCE • MINOR REPAIR • MONITORING
❑ (80) PROVIDE ADDITIONAL RIPRAP:
O (81) LUBRICATE AND OPERATE OUTLET GATES THROUGH FULL CYCLE
0(82) CLEAR TREES AND /OR BRUSH FROM:
(83) INITIATE RODENT CONTROL PROGRAM AND PROPERLY BACKFILL EXISTING HOLES: downstream slope & toe
V (84) GRADE CREST TO A UNIFORM ELEVATION WITH DRAINAGE TO THE UPSTREAM SLOPE:. Add more road base to make it easier to maintain
[1(85) PROVIDE SURFACE DRAINAGE FOR:
0 (86) MONITOR:
(88) OTHER
J(89) OTHER
ENGINEERING • EMPLOY AN ENGINEER EXPERIENCED IN DESIGN AND CONSTRUCTION OF DAMS TO: (Plans and Specifications must be approved by State Engineer prior to construction.)
❑ (90) PREPARE PLANS AND SPECIFICATIONS FOR REHABILITATION OF THE DAM:
0(91) PREPARE AS -BUILT DRAWINGS OF:
El (92) PERFORM A GEOTECHNICAL INVESTIGATION TO EVALUATE THE STABILITY OF THE DAM:
0 (93) PERFORM A HYDROLOGIC STUDY TO DETERMINE REQUIRED SPILLWAY SIZE:
0 (94) PREPARE PLANS AND SPECIFICATIONS FOR AN ADEQUATE SPILLWAY:
❑ (95) SET UP A MONITORING SYSTEM INCLUDING WORK SHEETS, REDUCED DATA AND GRAPHED RESULTS:
n (96) PERFORM AN INTERNAL INSPECTION OF THE OUTLET:
L� (99) OTHER:
SAFE STORAGE LEVEL RECOMMENDED AS A RESULT OF THIS INSPECTION
0(101) FULL STORAGE
* (102) CONDITIONAL FULL STORAGE
ID (103) RECOMMENDED RESTRICTION
El (104) CONTINUE EXISTING RESTRICTION
REASON FOR RESTRICTION
ACTIONS REQUIRED FOR CONDITIONAL FULL STORAGE P^
Items (97) and (96)
(87) DEVELOP AND SUBMIT AN EMERGENCY PREPAREDNESS PLAN: Update plan as changes occur
remove old pipeline from dam crest near the spillway to make crest regrading easier.
Uncover outlet Intake
(97) OTHER: For outlet inspection, construct cofferdam as planned under direction of engineer
(98) OTHER: The submittal of plans and specs for item (97) are not required
Page 2
ITEMS REQUIRING ACTION BY OWNER
TO IMPROVE THE SAFETY OF THE DAM
DAM I.D.: 370107
(72) CONDITIONALLY SATISFACTORY 0(73) UNSATISFACTORY
Both old pipe & siphon. Keep us aprised of inspection & submit report
Owner's
Signature
FT. BELOW DAM CREST
FT. BELOW SPILLWAY CREST
FT. GAGE HEIGHT
NO STORAGE - MAINTAIN OUTLET FULLY OPEN
INSPECTED BY OWNER/OWNER'S REPRESENTATIVE
DATE. 7/17/2003 7
DATE:
pp 2 of