| #projects |
#Risks |
type |
delivery method |
size |
|
| 20 |
2084 |
All |
DB |
All |
|
| Number |
Risk |
Frequency |
Prob |
Cost |
Schedule |
| 1 |
additional cost for utility relocation |
100 |
0.33 |
0.44 |
0.60 |
| 2 |
differing site conditions |
100.00 |
0.35 |
7.67 |
0.50 |
| 3 |
delays in right of way acquisition |
100.00 |
0.26 |
1.03 |
0.98 |
| 4 |
market condition |
90.00 |
0.19 |
3.63 |
|
| 5 |
additional preconstruction costs (administration and design extended overheads) due to schedule delays |
85.00 |
0.25 |
1.09 |
1.80 |
| 6 |
additional project costs incurred due to current accelerated base schedule |
85.00 |
0.30 |
0.82 |
0.75 |
| 7 |
refinement in wetland mitigation due to change in ponds |
85.00 |
0.05 |
0.07 |
0.03 |
| 8 |
construction change orders |
80.00 |
0.67 |
21.84 |
|
| 9 |
weather days and holidays |
70.00 |
0.42 |
11.94 |
2.53 |
| 10 |
encounter significant archaeological resources |
70.00 |
0.20 |
1.07 |
1.87 |
| 11 |
additional construction easements formerly labeled r-4 |
70.00 |
0.40 |
3.89 |
2.00 |
| 12 |
changes to design standards |
65.00 |
0.75 |
3.56 |
|
| 13 |
hazardous materials |
65.00 |
0.16 |
0.04 |
0.04 |
| 14 |
opportunity to reduce wildlife mitigation costs |
65.00 |
0.14 |
0.14 |
0.18 |
| 15 |
design exceptions not approved |
65.00 |
0.40 |
1.87 |
5.03 |
| 16 |
change in design during construction |
65.00 |
0.08 |
0.04 |
|
| 17 |
bridge design refinement |
60.00 |
0.65 |
2.13 |
-2.30 |
| 18 |
additional noise reduction elements are required |
60.00 |
-0.04 |
0.35 |
0.00 |
| 19 |
delays in utility relocations |
55.00 |
0.69 |
0.69 |
3.00 |
| 20 |
landscaping and aesthetics cost may be reduced |
55.00 |
-0.36 |
0.59 |
|
| 21 |
right of way |
55.00 |
0.10 |
0.03 |
|
| 22 |
labor and material constraints due to other projects in region |
55.00 |
0.60 |
0.48 |
|
| 23 |
additional refinements to floating bridge design require more wind/wave analysis (construction impact) |
55.00 |
0.40 |
-0.80 |
0.00 |
| 24 |
right of way base cost adjustment |
50.00 |
|
|
|
| 25 |
maintenance of traffic |
50.00 |
0.30 |
0.10 |
0.25 |
| 26 |
construction noise |
50.00 |
0.30 |
|
0.45 |
| 27 |
unanticipated contaminated or hazardous materials discovered during construction (other than captured separately) |
50.00 |
0.26 |
0.75 |
0.14 |
| 28 |
utility coordination |
50.00 |
0.20 |
0.01 |
1.50 |
| 29 |
change in environmental regulations |
50.00 |
0.05 |
0.01 |
|
| 30 |
delay in environmental process |
50.00 |
0.20 |
|
0.16 |
| 31 |
change in configuration of one or more interchange |
50.00 |
|
|
|
| 32 |
general project delays |
45.00 |
0.30 |
|
1.42 |
| 33 |
electric utility relocation |
45.00 |
0.40 |
2.20 |
-0.75 |
| 34 |
additional right of way required |
45.00 |
0.35 |
|
0.75 |
| 35 |
construction delay in kg contract impacts first pontoon delivery - pontoon construction |
45.00 |
0.53 |
|
1.31 |
| 36 |
unsuitable soils and muck |
45.00 |
0.39 |
0.39 |
0.75 |
| 37 |
design quality control - dbc task |
40.00 |
|
|
|
| 38 |
environmental compliance - known permit conditions/restrictions - unexpected permit conditions |
40.00 |
0.23 |
1.00 |
0.25 |
| 39 |
maintaining/damaging existing its during construction |
40.00 |
|
|
|
| 40 |
federal funding making all utilities compensable |
40.00 |
0.57 |
2.55 |
1.82 |
| 41 |
delay in right of way document internal approval process |
40.00 |
0.05 |
|
0.04 |
| 42 |
underestimating timing and process to finalize octa/rctc cooperative agreement (orca) in order to meet rfp document preparation |
40.00 |
|
|
|
| 43 |
material availability |
40.00 |
0.10 |
0.05 |
|
| 44 |
erosion control |
40.00 |
0.33 |
0.56 |
|
| 45 |
constructability issues associated with the west approach structure |
40.00 |
0.50 |
0.43 |
|
| 46 |
delays to finish of feis from programmatic enviromental delays |
40.00 |
0.60 |
|
0.60 |
| 47 |
safety issues |
35.00 |
0.55 |
0.20 |
3.00 |
| 48 |
design exceptions |
35.00 |
0.10 |
0.20 |
|
| 49 |
reuse pond excavation as fill |
35.00 |
0.00 |
0.18 |
|
| 50 |
design schedule constraints |
35.00 |
0.50 |
1.00 |
|
| 51 |
additional cost associated with anchors |
35.00 |
|
0.23 |
|
| 52 |
tunnel cross-section immersed tube tunnel (itt) vs. bored tunnel |
35.00 |
0.25 |
5.00 |
|
| 53 |
identify potential staging areas and dry dock availability |
35.00 |
|
|
|
| 54 |
cost premium associated with availability of materials and equipment |
35.00 |
|
|
|
| 55 |
delays in utility agreements |
35.00 |
0.38 |
|
1.52 |
| 56 |
construction contract duration uncertainty |
35.00 |
0.10 |
0.05 |
|
| 57 |
change in drainage design |
35.00 |
0.00 |
85.00 |
|
| 58 |
utility relocation may not happen in time |
35.00 |
0.48 |
75.00 |
1.52 |
| 59 |
utility work windows |
35.00 |
|
|
|
| 60 |
additional third party agreements and/or mitigation (other than addressed separately) |
35.00 |
0.38 |
5.47 |
|
| 61 |
third party utility relocation |
35.00 |
0.35 |
1.00 |
4.00 |
| 62 |
risk that there are issues with pontoons after they are accepted from gray's harbor. |
35.00 |
0.32 |
0.45 |
0.77 |
| 63 |
finding new sinkholes in geotech investigation (for section 1a) |
35.00 |
0.05 |
0.02 |
|
| 64 |
issues gaining city of seattle and city of medina street use permit |
35.00 |
|
|
|
| 65 |
delay of funding |
35.00 |
0.30 |
10.00 |
1.50 |
| 66 |
condemnation takeslonger than expected (for section 1a) |
35.00 |
0.11 |
|
0.24 |
| 67 |
change in tolling equipment technology |
30.00 |
0.40 |
0.80 |
|
| 68 |
dredged material disposal - not to hars |
30.00 |
0.40 |
20.12 |
|
| 69 |
federal highway administration approval |
30.00 |
0.21 |
|
0.19 |
| 70 |
market conditions: bid prices may differ from base estimate (considering uncertain contract packaging and competition)formerly labeled c-3 |
30.00 |
|
|
|
| 71 |
constructability of design |
30.00 |
0.90 |
-0.16 |
1.50 |
| 72 |
delays due to unknowns |
30.00 |
0.73 |
1.00 |
8.00 |
| 73 |
additional mitigation for section 4(f) impacts |
30.00 |
0.20 |
0.03 |
0.23 |
| 74 |
imr approval - pending fhwa approval - |
30.00 |
0.30 |
|
0.75 |
| 75 |
change in critical staffing during the project |
30.00 |
0.50 |
50.00 |
0.50 |
| 76 |
contaminations is a risk. soil waste on the west side, contamination on the east side |
30.00 |
0.03 |
32.89 |
0.02 |
| 77 |
coordination with local agencies (for section 2a) |
30.00 |
|
0.02 |
|
| 78 |
work restrictions |
30.00 |
|
|
|
| 79 |
existing its fiber optic backbone |
30.00 |
|
0.10 |
|
| 80 |
coordination between i-95 and the fce project |
30.00 |
1.00 |
50.00 |
3.00 |
| 81 |
delays in utility agreements |
25.00 |
0.05 |
|
0.03 |
| 82 |
change to lid substructure design assumptions |
25.00 |
0.50 |
12.50 |
-3.80 |
| 83 |
constructability challenges near the fishing bridge |
25.00 |
0.90 |
0.07 |
|
| 84 |
changed delivery method (design-build vs. design-bid-build) |
25.00 |
|
|
|
| 85 |
change to design assumptions for retaining walls |
25.00 |
|
13.80 |
|
| 86 |
issue in design concept is discovered during questions from bidders require additional time |
25.00 |
1.00 |
25.00 |
3.00 |
| 87 |
changed assumptions for ventilation, fire life safety and other systems in the montlake lid |
25.00 |
|
11.25 |
|
| 88 |
opportunity associated with the maintenance facility |
25.00 |
|
|
|
| 89 |
suicide prevention measures-netting |
25.00 |
|
0.86 |
|
| 90 |
design-builder innovations |
25.00 |
0.25 |
0.30 |
|
| 91 |
management decisions/ priorities delay the project |
25.00 |
0.3825 |
10.00 |
1.13125 |
| 92 |
additional work restrictions (e.g. noise, vibration, work hours) |
25.00 |
1 |
50.00 |
3 |
| 93 |
power connections for tolling and its |
25.00 |
|
1.28 |
|
| 94 |
connections between segments (for section 6) |
25.00 |
|
0.18 |
|
| 95 |
water table higher than estimated |
25.00 |
|
0.48 |
|
| 96 |
delay to wetland permits (or challenge to permit, such as from public opposition) |
25.00 |
1 |
0.05 |
4.5 |
| 97 |
caltrans may deny the approval of encroachment permit of utility relocations-highway easement dry standpipes |
25.00 |
|
|
|
| 98 |
additional aquatic mitigation resources are required beyond those specified elsewhere |
25.00 |
0.13 |
0.26 |
0.325 |
| 99 |
cost premium associated with availability of labor |
25.00 |
|
|
|
| 100 |
replacement of existing culverts |
25.00 |
|
|
|