20130909 Ver 1_Site Plan_20130826

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01 100, 200' 400'
SCALE I" = 200'
, A,
I ,
7
/CULVERT I
----------
121
Length of Stream Impacted (ft)
Ponded Water
45
Width of Boulder Dam
12
Total
57
CMP
3
52
0.16
YES
NO
2A
WHOM
5
44
0.15
YES
NO
213
CMP
N(_' L
41
0.16
YES
NO
3
CPP
1.5
20
0.17
NO
YES
4
CMP
3
_jV
0.35
NO
YES
5
CMP
01 100, 200' 400'
SCALE I" = 200'
, A,
I ,
7
/CULVERT I
----------
CULVERT 6
-- ----------- ---------
.... --- -----
.ULVERT 5
Pond Impacts in Jurisdictional Areas to be Removed
121
Length of Stream Impacted (ft)
Ponded Water
45
Width of Boulder Dam
12
Total
57
CMP
3
52
0.16
YES
NO
2A
WHOM
5
44
0.15
YES
NO
213
CMP
5
41
0.16
YES
NO
3
CPP
1.5
20
0.17
NO
CULVERT 6
-- ----------- ---------
.... --- -----
.ULVERT 5
Pond Impacts in Jurisdictional Areas to be Removed
Impact Description
Length of Stream Impacted (ft)
Ponded Water
45
Width of Boulder Dam
12
Total
57
Culvert Impacts in Jurisdictional Areas
Culvert ID
Type
Diameter
(ft)
Length
(ft)
Slope
(ft/ft)
Used to provide
access to current
residents
To be
removed
1
CMP
3
52
0.16
YES
NO
2A
CMP
5
44
0.15
YES
NO
213
CMP
5
41
0.16
YES
NO
3
CPP
1.5
20
0.17
NO
YES
4
CMP
3
41
0.35
NO
YES
5
CMP
3
Unknown
Unknown
NO
YES
6
CMP
2
30
0.33
NO
YES
7
CMP
3
44
0.19
NO
YES
Total Existing Measured Length 272
Total Measured Length to Remain 137
NOTES:
I. CMP = CORRUGATED METAL PIPE.
2. CPP = CORRUGATED PLASTIC PIPE.
3. FT = FEET.
4. CULVERTS 1, 2A, AND 2B TO REMAIN IN PLACE.
5. CULVERTS 3, 4, 5, 61 AND 7 TO BE REMOVED AND ASSOCIATED STREAM IMPACTS
RESTORED.
6. POND IMPACTS TO BE REMOVED AND ASSOCIATED STREAM IMPACTS RESTORED.
7. SLOPES MEASURED IN THE FIELD WITH A LASER LEVEL.
8. CULVERT LENGTHS MEASURED IN THE FIELD WITH A 100-FT TAPE.
9. INVERT OF CULVERT 2B BURIED AND BLOCKED WITH SLIDE DEBRIS. TOP OF CULVERT
WAS CUT OUT 9-FT FROM PRE-SLIDE INLET LOCATION TO CONVEY STREAM FLOW AFTER
THE SLIDE. CURRENT CULVERT LENGTH CONVEYING FLOW IS 41-FT.
10. CULVERT 5 LOCATED IN THE SLIDE AREA. CULVERT INLET BURIED WITH SLIDE
DEBRIS AND NOT CURRENTLY CONVEYING STREAM FLOW. UNABLE TO MEASURE CULVERT
LENGTH AND SLOPE IN THE FIELD.
11. IMPACT LENGTHS MEASURED IN THE FIELD WITH 100-FT TAPE.
12. HEIGHT OF DAM FROM CREST TO DOWNSTREAM CHANNEL THALWEG IS
APPROXIMATELY 10.5 FT.
13. WIDTH OF DAM MEASURED FROM DOWNSTREAM TOE OF DAM TO ASSUMED UPSTREAM
TOE OF DAM. UPSTREAM TOE OF DAM BURIED WITH SEDIMENT.
14. DAM MATERIAL CONSISTS OF STACKED BOULDERS WITH A POND LINER.
15. SITE VISIT CONDUCTED ON MAY 21, 2013.