58 Colorado Public Works Journal ACEC ENGINEERING FORWARD Andrew Sylvest The author Andrew Sylvest is Utility Engineering Manager at SAM Companies. ASCE38 Subsurface Utility Engineering – Part II ACEC Colorado Executive Director Note: This is Part II of an article about the ASCE38 Subsurface Utility Engineering bill. To learn more about this bill and how it could affect your firm, join us for the Colorado Chapter APWA fall con- ference October 29 and 30 where Dana Bijold, PE with Goodbee will provide a presentation on this topic. Governor John Hickenlooper signed Senate Bill 18-167 – concerning increased enforcement of requirements related to the location of underground facilities - into law. The intent of this law is to improve and protect the health, safety, and welfare of the public by accomplishing three key changes to existing policy: 1) Eliminate tier two membership of utility companies in Colorado 811 and establish a true One Call system 2) Establish a Safety Committee to enforce the law universally and fairly 3) To improve the quality of utility data on construction plans by requiring the use of ASCE 38 during design. Owners will be required by the new law to use professionally licensed consultants rather than “utility locating and potholing contractors” and will in turn receive a professional product that is backed by professional liability insurance and suitable for design rather than questionable data that is disclaimed leading to the liability subsequently being passed on to the contractor resulting in higher bids. By performing Quality Level “B” designating concurrent with the topographic sur- vey, the designer will have a surface base map and a subsur- face utility base map suitable for design that is backed by professional liability insurance against errors and omissions. By performing Quality Level “A” test holes only at conflict points identified later during design we will eliminate exces- sive excavations which will reduce costs and disturbances to the pavement on our roads while providing precise horizontal and vertical location at critical points of potential conflict. CDOT made the decision to adopt ASCE 38 prior to the signature of Senate Bill 18-167, but all public project owners must now adopt this standard as of August 8, 2018 for all horizontal projects that require a Professional Engineer for the design and have a construction excavation footprint over 2’ in depth and over 1000 contiguous square feet in area. An FHWA sanctioned study on $1B in transportation projects found a savings of $4.62 per $1 spent during design on Sub- surface Utility Engineering Services. Numerous other studies show savings ranging from $3.41 to $22.21 per $1 spent. The adoption of this standard will reduce construction costs and schedule durations by reducing or eliminating surprises in the field requiring emergency redesign or relocation as well as delay claims due to differing site conditions. If applied properly, this risk based depiction of utility data will allow contractors to reduce utility contingencies and perform excavation faster by reducing uncertainty regarding the position of the utilities.