# Line Extension

**Citation:** 4 CCR 723-4 Rule 4210  
**Type / status:** regulation / current  
**Agency:** Colorado Public Utilities Commission  
**Effective:** Not stated  
**Published:** Not stated

(a) A utility shall have tariffs which set out its line extension policies, procedures, and conditions. (b) In its tariff a utility shall include the following provisions for gas main extensions and service lateral extensions from its distribution system: (I) the terms and conditions, by customer cl

## Document text

(a) A utility shall have tariffs which set out its line extension policies, procedures, and
conditions.
(b) In its tariff a utility shall include the following provisions for gas main extensions
and service lateral extensions from its distribution system:
(I) the terms and conditions, by customer class, under which an extension
will be made;
(II) provisions requiring the utility to provide to a customer or to a potential
customer, upon request, service lateral connection information necessary
to allow the customer's or potential customer's facilities to be connected to
the utility's system;
(III) provisions requiring the utility to exercise due diligence in providing the
customer or potential customer with an estimate of the anticipated cost of
a connection or extension; and
(IV) provisions addressing steps to ameliorate the rate and service impact
upon existing customers, including stating in the tariff the procedures by
which future customers would share costs incurred by the initial or existing
customers served by a connection or extension (as, for example, by
including the procedures by which a refund of customer connection or
extension payments would be made when appropriate).
(c) Line extension policies, procedures, and conditions shall be based on the
principle that the connecting customer pays its share of the estimated full
incremental cost of growth, including any costs associated with increases in
design peak demand.
(d) Line extension allowances shall be updated pursuant to paragraph 4210(c) in a
base rate proceeding, or in a separately filed application, as required, but should
be implemented no later than December 31, 2024. If a utility utilizes standardized
costs in calculating one or more portions of its line extension policies, the
standardized costs must be updated in a base rate proceeding, utilizing the
average actual cost across the applicable customer class and line extension type

for the most recent consecutive 12-month period for which compiled cost data is
available at the time it initiates a base rate proceeding. Exemptions from updated
line extension allowances and standardized costs shall not extend to applications
for line extensions submitted after May 1,2023, unless otherwise ordered by the
Commission.
(e) Line extension policies, procedures, and conditions shall generally align with the
greenhouse gas emission reduction goals established in § 25-7-102(2)(g), C.R.S.

## Provenance

- Official: Yes
- Source: <https://www.sos.state.co.us/CCR/DisplayRule.do?action=ruleinfo&ruleId=2260&deptID=18&agencyID=96&deptName=Department%20of%20Regulatory%20Agencies&agencyName=Public%20Utilities%20Commission&seriesNum=4%20CCR%20723-4>
- Source ID: `co-sos-ccr`
- SHA-256: `34f4b78250c8bfb95ee98f97481273b355dce5f9ef83fcc7aa422d95933ac484`
- Retrieved: 2026-08-12T04:36:48.096Z
- Exported: 2026-08-24T04:44:33.402Z
- Document slug: `co-ccr-4-723-4-4210`

### Source metadata

```json
{
  "jurisdiction": "US-CO",
  "code": "4 CCR 723-4",
  "ruleKey": "4210",
  "pipelineScope": "colorado-jurisdictional-gas-utilities",
  "legalScope": "Current 4 CCR 723-4 rules regulating Colorado jurisdictional gas utilities and gas master-meter operators, including construction, operation, system safety, gas infrastructure planning, metering, service, and enforcement provisions. This is an adjacent gas-utility corpus, not a replacement for the repealed dedicated 4900-series pipeline-safety rules.",
  "applicabilityCaveat": "Part 4 applies according to Colorado Public Utilities Commission jurisdiction and each rule's scope. The former dedicated pipeline-safety rules 4900 through 4975 are reserved after repeal; this connector does not represent them as current. Part 4 does not replace federal pipeline-safety requirements, determine whether a facility is interstate or intrastate, or resolve operator-specific orders, waivers, tariffs, or later rulemaking.",
  "references": [],
  "ruleInfoUrl": "https://www.sos.state.co.us/CCR/DisplayRule.do?action=ruleinfo&ruleId=2260&deptID=18&agencyID=96&deptName=Department%20of%20Regulatory%20Agencies&agencyName=Public%20Utilities%20Commission&seriesNum=4%20CCR%20723-4",
  "pucRulesUrl": "https://puc.colorado.gov/gasrulesandregulations",
  "ruleVersionId": "12549",
  "editionEffectiveOn": "2026-06-14",
  "publicationStatus": "The Colorado Secretary of State identifies the source as the official publication of state administrative rules. The edition date applies to the compiled rule version and is not represented as the effective date of every provision.",
  "rights": "Official state rule text is preserved with attribution and source links. Public accessibility does not imply rights in agency marks, third-party material, or incorporated standards; commercial redistribution requires review.",
  "region": "CO"
}
```