Adobe Creek Upper Reach 5
Proposed Project Elements Table
May 17, 2006
No.
1
2
3
4
Project Element
Construction staging area at Edith Park
Existing sanitary sewer line upstream of West
Edith Avenue Bridge.
Channel invert between existing sewer line and
upstream face of West Edith Avenue Bridge.
Sediment removal under West Edith Avenue
Bridge
5
Existing wing wall on Los Altos creek
6
Existing wing wall on Los Altos Hills creekside.
7
Construct one step pool downstream of West Edith
Avenue Bridge.
8
Construct new channel with 1:1 slopes on LAH
side. Cross section will intersect existing ground
on LA side (see typical section A).
9
Abandon existing channel on Thies property (see
typical section B).
10
Construct new channel with 1:1 slopes on LAH
side with bank protection due to truncated cross
section (see typical section C)
11
Construct new channel with 1:1 slopes on LAH
side. Cross section will be a truncated cross
section (see typical section C)
12
13
Temporary creek access from Fremont Road
Construction staging area on Los Altos Hills
creekside.
by: Tony Ndah
May 17, 2006
Page 1 of 2
Status
Resolution
Sewer line to remain
Regrade channel invert
Remove 1.5 feet of sediment underneath
West Edith Avenue Bridge.
Existing wing wall to remain. Extend
wing wall to Millar/Levis property line.
Remove existing wing wall and construct
new retaining wall from downstream
face of West Edith Avenue bridge to
limits of blue line on Los Altos Hills
creek bank.
Existing hardscape on Los Altos
creekside to remain. Cutoff walls for the
existing gunite will be reinforced.
Existing wood bank protection at Millar
and Wittner property to be removed.
Chain link fence at Lippe property to be
removed.
Construct new channel with 1:1 bank
slopes and abandon existing channel on
Thies property. Need TCE from Thies
prior to performing work.
Cross section at this location is
constricted i.e. 2 BF width is NOT
achieved. This section needs bank slope
protection for the LAH side. Staff to
discuss impacts of bank slope protection
on trees of value with property owner
and resource agencies.
Cross section at this location is
constricted i.e. 2 BF width is NOT
achieved. Bank slope protection to be
provided on LAH creekside. Type of
protection to be discussed with property
owner and resource agencies.
No.
Project Element
14
Construct new channel with step pools (see typical
section D).
15
16
17
18
19
20
21
22
23
24
Remove portion of storm drain and reconstruct
outlet.
Planting limits outside of blue line on Los Altos
Hills side
Modify invert from existing concrete drop structure
to 160 feet downstream. Existing concrete block to
remain.
Protect bank toe on Moos property between
existing rock slope protection and existing
sackcrete protection.
Fill cavity behind existing gunite at Remmel
property with concrete material or similar.
Repair bank erosion at Remmel property with rock
slope protection from end of existing gunite to
property boundary with Robinwood Pool.
Bank slope protection at Robinwood Pool property
Reinforce cutoff wall at existing sackcrete slope
protection on Moos property.
Reinforce cutoff wall at existing sackcrete slope
protection on Robinwood pool property.
Reinforce cutoff wall at existing sackcrete slope
protection on Van Horne property.
25
Repair bank erosion at Van Horne property
downstream of existing sackcrete slope protection.
26
Repair bank erosion at Van Horne property at
existing storm drain on property.
27
28
29
Crib wall at Ward property
Temporary access for creek downstream of
Robleda storm drain outlet
Assarson's erosion concerns at patio
by: Tony Ndah
May 17, 2006
Page 2 of 2
Status
Resolution
Existing bank on LA side to remain.
Reinforce cutoff wall for existing gunite.
Cross section exceeds blue line near
storm drain outlet. Issue has been
resolved with property owner.
Portion of storm drain to be removed to
match proposed channel banks.
Pending review by District biologist to
determine ecological benefit. Provide
equivalent level of protection at existing
rock slope protection along Moos
property.
Provide toe protection up to 3 feet above
channel invert (2 BF height).
Height of rock slope protection to
resolved with property owner and
resource agencies.
Protect creek invert and provide toe
protection 3 feet above creek invert (2
BF height)
Use concrete material or similar
Use concrete material or similar
Use concrete material or similar
Height of rock slope protection to
resolved with property owner and
resource agencies.
Height of rock slope protection to
resolved with property owner and
resource agencies.
Crib wall to be replanted, and irrigated.